Types and application/uses of medical titanium wires and titanium alloy wires in density

Titanium alloy wire is used as a new type of dental material because of its low thermal conductivity and protective effect on the dental pulp. The price is also relatively cheap. Titanium alloy dental implants are more and more widely used in clinical applications at home and abroad. Researchers from the University of Sydney in Australia have made a unique denture that uses titanium as a dental tray material to replace the cobalt-chromium alloy material that has been used in the past. Titanium alloy dental tray is not only light in weight and good in toughness, but also can adapt to the natural movement of teeth in the gums, and will not produce an adverse biological reactions.

The following are the apppliction and process method of titanium alloy wires .

Usage

Types of Titanium Alloy

Processing Methods

artificial tooth root

pure titaniumTi-6Al-4VELI(TC4ELI)titanium-nickel alloy

forgingforging

dental orthodontic wires

titanium-nickel alloy wires

        β titanium alloy

wiredrawing

      crown bridge for molars

pure titaniumtitanium alloy

forging

crown bridge for front teeth

pure titaniumtitanium alloy

forging

gums

TC4 titanium alloypure titanium

deformationimprint

casting

dental plate

titanium-nickel alloy

forging

Jawbone implants

Pure titanium

forming

 

Medical Titanium Wires ASTM F136 Ti 6Al-4V Eli.jpg


Titanium And Titanium Alloy Plates In Chemical Industry

Titanium is an inert metal, its chemical symbol is ti, atomic number is 22 and its a silver metal. The specific gravity is 4.51, the melting point is 1668℃. Because different products in different fields require different titanium and titanium alloy products, people process them into plates, bars, pipes, tapes, wires and other shapes that can be further processed for the majority of demanders to meet the requirements of different fields. Among these, titanium rings and titanium forgings are the mostly widely used. The following are the specifications and performance of commonly used titanium plate in chemical industry.

1、Standard

Executive Standard: GB/T3621-2007

2、Product Standard, Status, Size

Grade

Methods of

Fabrication

Supply Status

Supply Thickness mm

Supply Size

TA0\TA1\TA2

Hot Rolling

R.M

4.1-60

δ0.3-60

Cold Rolling

R.M

0.3-4.0

TC4

Hot Rolling

R.M

4.1-60

Cold Rolling

R.M

0.8-4.0

3Mechanical Properties

(1)Mechanical properties of titanium plate at room temperature

Grade

Thickness of 

Titanium Plates

mm

Mechanical properties at room temperature,≥


Tensile Strength

σbMPa

Yeiled Strength

σ0.2MPa

Elongation

δ5%

Bending Angle

α度 不小于

TA1

0.3~10.0

370-530

250

45-30

140-130

TA2

0.3~110.0

440~620

320

25

100-80

TC4

0.8~10.0

895

830

12-10

35-30

(2)Mechanical properties of titanium plate at high temperature

Grade

Test Temperature

Mechanical properties at high temperature,≥

Tensile Strength  σbMPa

Persistent strength  σ100hMPa

TC4

400

600

550

500

450

200

4、Surface Quality

The surface of titanium plate should be smooth and clean with metal nature color. Plates are allowed to be delivered with a sandblasted surface. Slight dimming/darkening and partial water marks are allowed on the surface; Partial defects, scratches, indentation, pits and other defects without exceeding half of the thickness tolerance are allowed, but the minimum thickness shall be guaranteed. The surface is not allowed to have cracks, peeling, oxide scaling, folding, metal and non-metal inclusions and other macroscopic defects and alkali washing traces. Titanium plate is allowed to clear the partial defects along the rolling direction, but the thickness of the plate after removal is not less than the minimum thickness. In addition, titanium plate should not be layered.



The Grade Choice of Titanium And Titanium Alloy Used In Petroleum And Natural Gas Exploitation

1625034904921303.jpg


In response to the severe well condition with high sulfer content, Nickel-based alloy tubing is currently mostly used, But for the high density of Nickel-based alloy tubing, the safty factor of deep well pipe column is not rich. And it requires higher strength in the ultra deep well. Titanium allloy has become a new choice of the pipeline material, because of its higher corrosion resistance performance, And the density of titanium is only half percent of that of nickel-based alloy.

 

In this few years, a variety of titanium and titanium alloy have been selected for analysis and testing the production of tubing in order to provide new options for deep and ultra-deep wells solutions. The selection of titanium alloy tube, pure titanium and titanium alloy in oil and gas exploitation and production are shown in the following table.



Material

The Lowest Yield Strength/MPa

Application

Industrial Pure Titanium(TA1)

140

plate heat exchanger;

Industrial Pure Titanium(TA2)

275

tubular heat exchanger;  seawater pipeline;

Ti-0.3Mo-0.8Ni(TA10)

345

tubular heat exchanger; ground pipeline; vertical pipe; transmission pipeline;

Ti-3Al-2.5V(TA18)

485

ground pipeline; structure on the drilling tool; vertical pipeline, transmission pipeline;

Ti-6Al-4V Eli

760

Drilling Well Vertical Pipe; Oil extraction and output vertical pipes; fastener

Ti-6Al-4V(TC4)

827


Ti-6Al-4V-0.05Pd(TC22)

827


Ti-6Al-2Si-4Zr-6Mo(TC19)

965

conical stress connectors; Oil extraction and output vertical pipes;

 

 



HUAWEI WATCH 3 Pro's First Hongmeng Watch With Titanium Body And Ceramic Material

HUAWEI WATCH 3 Pro's first Hongmeng watch uses all-titanium metal as the main material of the watch body, which is also a metal material that some high-end watches will consider. Titanium metal looks similar to stainless steel, both with silver-gray luster. Titanium metal can maintain its original color at room temperature. It does not easily turn black and has high acid resistance. It has high hardness, lightness and corrosion resistanceand strong characteristics.


Thanks to the addition of titanium material, the weight of the watch body of HUAWEI WATCH 3 Pro is about 63g, and it will not feel cumbersome to wear on the hand.

HUAWEI WATCH 3 Pro钛金属表体.jpg

What is needed to fuse titanium screws

Industrial titanium screws do not require special preparation for fusion welding with contact welding. When there is a thicker oxide film layer, you need to use the mechanical cleaning of the party did not or in a 5% solution of hydrofluoric acid will remove it.


Titanium screw manufacturer


  Titanium screws arc welding, in a clean Bai sex gas (helium, argon) gas weave, and with direct current can achieve better results, when the tungsten electrode is the cathode.


  Direct fusion of titanium screws with nickel, brocade chromium alloys and other alloys containing nickel is not suitable because of the formation of harmful fusible eutectic crystals. In this case, between materials of different nature, it is necessary to place spacers with a thickness of 15-20 microns, they are usually molybdenum, tantalum or niobium. In compliance with this condition, titanium screws or parts fused to nickel or nickel alloys can be annealed and degassed very smoothly at temperatures up to 1500°C in vacuum or inert gas.


     Anodes for platinum-plated titanium screws have been in use for many years. The methods of platinum plating on titanium screws are electroplating (molten salt plating) and pyrolysis, but also direct cladding, such as explosive compounding. Platinum plating is usually carried out in a cyanide molten salt bath with a cyanide ratio of 53% sodium cyanide and 47% potassium cyanide at a temperature of 520°C. The platinum sheet is used as a soluble anode. The thickness of the plating is 1500 um and the deposition rate is 20-25 um/h. With aqueous solution plating, the deposition rate is low and a thicker layer is not obtained.


  Aqueous silver plating process is simple and easy to operate, but the thickness of the plating layer - generally can not exceed 2.5um. titanium screw manufacturers if the use of extra-vein plating process, you can get 3-6um thick bright platinum plating. The aqueous solution is H2Pt(NO2)z2S04, containing 5-l0g of platinum per liter of solution, with sulfuric acid pH 1.2-2, the temperature is 50 ℃, the current waveform is cloudy, the break-through ratio is 5-9, the average current density is 50-100A/m2, the anode is the anode. 100A/m2, the anode is pure platinum. Iridium and platinum coatings on titanium have a very low chloride precipitation electrovalence in the chloride, the research and application of this titanium screw anode has received more attention. The use of thermal decomposition method to prepare this type of Chin electrode DingYi and the preparation of rust-oxide electrode is similar to the case: the platinum and iridium chloride dissolved in butanol and anisole volume ratio of 3:1 mixture, tI, its small noble metal content of 2.13mg/cm3, where the mass ratio of platinum and iridium is 6:4; in the titanium specimen brush coated with this mixture, dry at 500 ℃ for heating film formation. This needs to be repeated several times until the required thickness is reached, and the thickness is usually controlled at about 20g/m2.

Low temperature titanium alloy material application status

On the one hand, spacecraft structural materials must have sufficient strength and toughness and excellent thermal properties at low temperatures; on the other hand, considering the complexity of the shape of the spacecraft structural parts, the material must have good machinability.

      Compared with traditional cryogenic materials, titanium alloys have higher yield strength at low temperatures, more than 3 times that of stainless steel, while their density is only 1/4 to 1/2 that of stainless steel. in addition, titanium alloys also have a series of advantages such as low thermal conductivity, low coefficient of expansion, non-magnetic, etc., so they are very suitable as new cryogenic materials for space applications.

      At present, cryogenic titanium alloy has been initially applied in the field of liquid rocket engines, mainly as structural materials for hydrogen and oxygen engine storage tanks, hydrogen pump impellers, etc., which has significantly improved the thrust-to-weight ratio, working life and reliability of liquid rocket engines. The problem of low-temperature titanium alloy application is that the elongation and fracture toughness of titanium alloy in low-temperature environment decreases greatly, showing obvious low-temperature brittleness, therefore, how to reduce the low-temperature brittleness of titanium alloy and improve the toughness and plasticity of titanium alloy under low-temperature conditions become the top priority of low-temperature titanium alloy research.

      Scholars at home and abroad have conducted a lot of research to solve this problem and found that two methods can effectively improve the low-temperature properties of titanium alloys by reducing the content of C, H, O and other interstitial elements, and reducing the content of aluminum elements. Through these two methods, a series of new low-temperature titanium alloys with excellent performance have been developed at home and abroad.

      The former Soviet Union was committed to the development and application of low-temperature titanium alloys. By reducing the content of aluminum elements, the former Soviet Union developed a series of low-aluminum cryogenic titanium alloys, among which OT4 and BT5-1 were widely used. OT4 alloy was used in spacecraft orbital docking parts, liquid rocket piping and combustion chamber structural parts; BT5-1 alloy was used in the manufacture of liquid hydrogen containers. In order to further improve the pulse propulsion ratio of liquid rocket motors, a Russian research institute has conducted research and development of high-strength, high plasticity low-temperature titanium alloys suitable for extremely low temperatures of -253°C. 

      The research on low-temperature titanium alloys in the United States has focused on the α-type titanium alloy TA7 ELI (Extra low interstitial) and the α+β-type titanium alloy TC4 ELI. TA7 ELI is a near-α type titanium alloy with good toughness, low thermal conductivity and notch sensitivity at 20 K. It has been successfully used in cryogenic vessels, cryogenic pipes and liquid rocket motor impellers. In the Apollo program, TC4 ELI was used as the main material for liquid hydrogen vessels and liquid hydrogen conduits and achieved good results. In addition, American scholars have also carried out fundamental research on the fracture mechanism and hydrogen embrittlement of cryogenic titanium alloys, and obtained data on the mechanical properties and fracture mechanism of TA7 ELI, TC4 ELI and other cryogenic titanium alloys, which laid the foundation for the further development and application of cryogenic titanium alloys.

      In the field of low-temperature titanium alloy research and development, compared with the United States and Russia and other developed countries, China started late and relatively backward technology. In recent years, with the development of aerospace industry, China began to carry out research on low-temperature titanium alloys. During the "Ninth Five-Year Plan" period, China has carried out the research and development of Ti-2Al-2.5Zr, Ti-3Al-2.5Zr, CT20 and other low-temperature titanium alloys, and the performance of the low-temperature titanium alloys developed in China is shown in Figure 3. CT20 alloy is a low-temperature titanium alloy with all our own property rights, which can be used at very low temperature of 20 K. The alloy has good mechanical properties at low temperatures, with strength greater than 1100 MPa and elongation greater than 10% at 20 K. The alloy also has excellent forming properties and can be processed into bars, plates, tubes and wires. So far, CT20 alloy has been successfully used in a spacecraft cryogenic piping. At the same time, the influence of interstitial elements on the low-temperature mechanical properties of CT20 alloy has been investigated to provide a reference for the further improvement of CT20 titanium alloy performance.

Titanium Screws

Titanium and titanium alloys are widely used as bone implant and dental restoration materials for medical titanium machined parts in recent years because of their low density, high specific strength, good corrosion resistance and biocompatibility. However, the elastic modulus of titanium and titanium alloys does not match natural bone, and their strength (tensile strength, compressive strength and flexural strength, etc.) is also much higher than that of human bone. Under stress, the material and bone will generate different strains, causing relative displacement at their interfaces, and the load cannot be completely transferred from the implant to the adjacent bone tissue, and the bone lacking sufficient stress stimulation will degrade, atrophy, or even be resorbed, eventually leading to loosening and fracture of the implant, which cannot meet the requirements for long-term use and limits its further application. More and more researchers at home and abroad are exploring ways to reduce the elastic modulus of titanium and titanium alloys in order to reduce or eliminate this "stress shielding" phenomenon and improve the biomechanical compatibility of titanium and titanium alloys.


Titanium alloy processing


In general, there are two ways to reduce the modulus of elasticity of titanium and titanium alloys: one is alloying, where the modulus of elasticity of B-type titanium alloys is lower than that of a-type titanium alloys. The lower elastic modulus available in titanium alloys so far has been reported to be about 40 GPa obtained in Ti-Nb.Sn system alloys, and it is very difficult to reduce it further to below 4 OGPa. However, the elastic modulus of cortical bone is 4.4 to 28.8 GPa, and cancellous bone is only 0.01 to 3.0 GPa_8, and alloying is limited to reduce the elastic modulus of titanium alloys. Another method is to introduce pore structure to obtain porous titanium and titanium alloy, whose mechanical properties such as density, modulus and strength can be adjusted to match the replaced bone tissue by adjusting the pores.




In addition, the unique porous structure and the rough inner and outer surfaces are conducive to the adhesion, proliferation and differentiation of osteoblasts, which promote the growth of new bone tissue into the pores and the formation of a biological fixation between the implant and the bone, and finally the formation of a whole; the open three-dimensional connecting pore structure enables the transfer of body fluids and nutrients in the porous implant, promotes tissue regeneration and reconstruction, and accelerates the healing process. Therefore, porous titanium and titanium alloys with the above characteristics are considered to be the most attractive bio-implant materials, and have become a hot spot for research on biomaterials in recent years.

A few suggestions for titanium plate welding

For general titanium plate, the most commonly used specifications are density 4.5, color silver gray, size 2 meters long and 1 meter wide, thickness is not determined according to actual needs. For the current titanium plate welding situation, the following recommendations are made.


Titanium plate manufacturers


In general, the general titanium plate welding requirements are as follows.


1: The welding surface of the titanium plate does not need oxide skin, no cracks, and the thickness between the mutual welding does not exceed 3 mm.


Secondly, the welding environment of titanium plate requires that the temperature of the welding room should be between 5℃~30℃; the welding room must be clean, dust-free and maintain a dry environment; the shield should try to use titanium plate.


3: titanium plate welding wire needs to pickle the surface, the wire should not have cracks and oxidation, to use the same blank material as the parent material.


4: titanium plate welding argon protection in the welding process requires three layers of protection, namely, the upper protection, lower protection protection and argon containing torch protection. Upper and lower protection personnel should follow the image area of the welding torch to ensure the protection of argon at high temperatures and to prevent oxidation. The purity of argon is 99%.


These are some requirements for titanium plate welding, in order to meet these requirements can be very good welding, so usually we need to pay attention to these areas when welding.

Titanium bar manufacturers introduce TC4 titanium alloy small size bar process

TC4 titanium alloy bar is currently the most mature technology and the most widely used titanium alloy. With the development of science and technology in recent years, the alloy in the aviation, aerospace, medical field has a wider range of applications, especially small-size bars in the medical field applications are increasing.


Small-size bars of titanium and titanium alloys are generally produced by traditional cross-row mills, which have low production efficiency. There is a certain gap between the bar surface size, straightness and other aspects and the advanced level at home and abroad. Some foreign titanium alloy material manufacturers in order to improve production efficiency and product quality and stability. Has begun to use hot rolling technology to produce titanium alloy small-size bars. Baoji TC4 titanium alloy bar manufacturers for the company's small batch, multi-specification, multi-species industrial characteristics of the construction of titanium continuous rolling production line, the use of hot continuous rolling equipment instead of cross-row mills to produce titanium alloy small-size bars.


TC4 titanium rods


Hot strip rolling can improve the appearance quality of titanium and titanium alloy small-size bars, shorten the production cycle, improve the yield rate, stabilize product quality and other advantages. Titanium bar manufacturers through the TC4 titanium alloy bar different temperature rolling process bar organization and properties of the study, aimed at providing technical reference for field production.


(1) TC4 alloy in the B region for continuous rolling process when after 21 times (ф 13.5mm) processing pairs, the original β grain completely disappeared. All for fine recrystallization isometric α. α + β


(2) TC4 alloy in α + β fork for continuous rolling process, when after 19 passes (фmm) processing, the original β grains completely disappeared, and a large number of fine equiaxed α now, with the increase in the amount of passes are all fine recrystallization equiaxed, and equiaxed instrument more fine dispersion, and the same pass plus β domain continuous rolling bar organization more fine dispersion.


(3) β-phase area and α + β two-phase continuous rolling of the squeeze performance are in line with GB / T13810 standard requirements, two-phase rolling than β-phase area rolling bar performance have improved, tensile strength increased by 80 ~ 90MPa, plasticity change is not significant.

Why are all prostheses used in hospitals titanium?


Have you ever noticed that many medical devices in hospitals, such as many prosthetic limbs, hip joints, shoulder joints and bone fixation devices, are made of titanium alloy? I'm sure many attentive partners have noticed this, and some partners with a good knowledge base will tell me that titanium is very compatible with the human body.


Yes, titanium alloys have many excellent properties such as high strength, good thermal strength, good corrosion resistance and good low temperature properties. Titanium alloy has been widely used in many fields such as automotive industry, aviation industry, medical equipment and so on. Nowadays, titanium alloy is also widely used in civilian applications, for example, many people wear glass that may be made of titanium alloy, which is generally a good choice for high strength, light weight and comfortable to wear.


So, back to our original question, why are titanium alloys so compatible with the human body? Why can't other metals, such as stainless steel, do the same?


Titanium is very compatible with the human body. Titanium is a pure metal, and because of its "pure" nature, there is no chemical reaction when titanium comes into contact with it. In other words, because titanium has high corrosion resistance and stability, it does not affect its nature after long-term contact with humans, so it does not cause human allergies, only it has no effect on the human autonomic nerves and taste of the metal.


Specifically, titanium has a very low density, which can greatly reduce the load on the human body after implantation. Titanium also has excellent corrosion resistance. Under specific environment, titanium surface can form a stable corrosion-resistant oxide film, which is an excellent bio-inertial metal material. Titanium is non-toxic and has a low modulus of elasticity. The elastic modulus of titanium alloy is quite close to that of natural bone and has good biocompatibility. Based on these advantages, titanium alloys are widely used in medical materials such as bone trauma products, artificial joints, cardiovascular stents, and dental implants. The research of titanium alloy material is also one of the research hotspots of biomedical materials.


In the area of bone injury, fixed with titanium sheet and titanium screw, the bone will grow on the titanium sheet and the thread of the screw after a few months. The new muscle is wrapped around the titanium piece, and this "titanium bone" resembles a real bone, and it is even possible to use titanium artificial bone instead of human bone to treat fractures.


When titanium is used as an artificial organ, it dissolves with human tissue, which means that there is no major rejection, which makes the body feel not very different from the original tissue, but not really dissolve with each other, but actually similar.


Considering this, I am sure that everyone will be surprised by the fact that titanium can be used as a biological metal.


Translated with www.DeepL.com/Translator (free version)

Titanium Screws Overview of the thread machining process for joints

Titanium pipe coupling is a part of hydraulic system that connects pipelines or puts pipelines on hydraulic components, which is a general name for a connection that can be assembled and disassembled in the fluid path. Pipe fitting is a tool for connecting pipes to pipes, and is a connection point between components and pipes that can be disassembled and assembled.


It plays an integral and important role in pipe fittings, and it is one of the two main components of hydraulic piping. Titanium alloy is an alloy composed of titanium metal elements added to other metal elements. As a special material, titanium alloy is widely used in the aviation industry because of its light weight, high strength, high heat resistance and high corrosion resistance.


Titanium  screws


Especially in the manufacture of aircraft and rocket spacecraft, titanium alloy is used as an important material to make full use of its characteristics. However, for the machining of titanium alloy, its poor processing performance directly affects the processing quality and processing efficiency of titanium alloy parts products, especially in the processing process of titanium screw thread, there are considerable difficulties.


Titanium screw thread processing mostly use the wrong tooth tap for tapping operations, that is, the tap teeth every interval to remove a, staggered arrangement, so that the workpiece and tap contact only one side to reduce the friction between each other, reducing the torque generated by friction. This prevents seizure or damage to the taps and improves the quality of the threads.


For threads made of titanium alloy, the thread tailstock is usually longer than the standard length. Titanium screws are designed with a receding groove so that the taps do not chip when tapped to the bottom. Choose a coolant with good lubrication and high activity for direct cooling of the taps, so that the high temperature generated during the tapping process makes the taps and chips stick together, affecting the speed and accuracy of the taps.


Translated with www.DeepL.com/Translator (free version)

The physical and mechanical properties of titanium alloys make cutting and machining more difficult

The abundance of Ti in the earth's crust is 0.56% (mass fraction, the same below), ranking 9th among all the elements, and 4th among the metals that can be used as structural materials, second only to Al, Fe, Mg, and its reserves are more than the sum of the reserves of common metals Cu, Pb, and Zn. China is rich in titanium resources, the reserves of the world's first. Titanium alloy has low density, high specific strength and stiffness, good corrosion resistance, high temperature mechanical properties, fatigue resistance and creep properties, and excellent overall performance, and is a new type of structural material with great potential for development and application prospects.


Titanium screws" titanium alloy physical and mechanical properties of the cutting process has brought greater difficulty


Cutting characteristics of titanium alloy material: some physical and mechanical properties of titanium alloy make cutting and processing more difficult. Titanium alloy cutting deformation coefficient is small, making the chip in the front tool surface sliding friction distance increases, accelerating tool wear. Titanium alloy thermal conductivity is small, the heat generated during cutting is not easily transmitted, concentrated in a small area near the cutting edge. Titanium alloy modulus of elasticity is small, processing in the role of radial force is easy to produce bending deformation, causing vibration, increase tool wear and affect the accuracy of the parts. Due to the strong chemical affinity of titanium alloy to the tool material, the tool is prone to adhesive wear under the conditions of high cutting temperature and high cutting force per unit area.

Based on the understanding of the mechanism of titanium alloy machining and the previous experience, the main process know-how for machining titanium alloy is as follows.

(1) Use inserts with positive angle type geometry to reduce cutting forces, cutting heat and deformation of the workpiece.


The physical and mechanical properties of "titanium screws" titanium alloy make cutting more difficult


(2) Maintain a constant feed to avoid hardening of the workpiece, the tool should always be in the feed state during the cutting process, and the radial feed ae should be 30% of the radius during milling.

(3) Use high pressure and high flow cutting fluid to ensure the thermal stability of the machining process and prevent the workpiece surface from denaturing and tool damage due to high temperature.

(4) Keep the blade edge sharp, dull tools are the cause of heat build-up and wear, which can easily lead to tool failure.

(5) Machine titanium alloys in their softest state possible, as hardening makes the material more difficult to machine and heat treatment increases the strength of the material and increases the wear of the insert.


The physical and mechanical properties of titanium alloy "titanium screws" make cutting more difficult


(6) Use a large tip radius or chamfer cut to bring as much of the cutting edge into the cut as possible. This reduces the cutting force and heat at each point and prevents local breakage. In milling titanium alloy, each cutting parameter cutting speed has the greatest effect on tool life vc, radial draft (milling depth) ae the second.

"Titanium screws" several surface treatment methods of titanium screws

Due to the small density of titanium screws, titanium liquid flow inertia is small, poor mobility, in the process of production, it is easy to lead to the appearance of defects such as air holes on the surface and inside the titanium screws. Want to make the titanium screws bright and colorful, it is necessary to remove the surface reaction layer of titanium screws. There are two ways to remove the surface reaction layer of titanium screws.

1. sandblasting: the use of sandblasting will be sand impact titanium screw surface, thus generating intense sparks, temperature rise and titanium screw surface hair should occur, the formation of secondary pollution, affecting the quality of the surface. Time is 15 ~ 30 seconds, only to remove the casting surface of the sticky sand, surface sintered layer and part and oxide layer can be. The rest of the surface reaction layer structure is appropriate to use the chemical pickling method to quickly remove.

2, pickling: the use of cleaning pickling method can quickly and effectively remove the surface reactive layer of titanium screws clean, and will not produce other metal elements of pollution.

Titanium screws of high chemical reactivity, low thermal conductivity, viscosity, mechanical grinding and grinding ratio is low, and easy to react with abrasives, ordinary abrasives are not suitable for titanium screws grinding and polishing, it is best to use good thermal conductivity of super hard abrasives, such as diamond, cubic boron nitride, etc.


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Chemical polishing: chemical polishing is through the redox reaction of the metal in the chemical medium and achieve the purpose of leveling and polishing. The advantage is that chemical polishing and metal hardness, polishing area and structure shape, where the parts in contact with the polishing solution are polished, do not need to be special complex equipment, easy to operate, more suitable for complex structure of precision titanium screws polishing. However, chemical polishing in the process parameters are more difficult to control, requiring a good polishing effect on titanium screws without affecting the precision of titanium screws.

In order to increase the aesthetics of titanium screws, so that the surface of titanium screws more colorful and bright, but also to prevent titanium screws in natural conditions of continuous oxidation. General screw manufacturers will use surface nitriding treatment, atmospheric oxidation and anodic oxidation method of surface coloring treatment, so that the surface to form a light yellow or golden yellow, to improve the beauty of titanium screws. Anodic oxidation method uses the titanium's oxide film to interfere with light and natural coloring, which can form colorful colors on the titanium surface by changing the tank voltage.


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Of course titanium screw customization is mainly based on the user's different needs for screws to different surface treatment methods. The actual application environment of titanium screws is the main reason why titanium screws use what kind of surface treatment, these above are just the conventional titanium screw fasteners treatment. Titanium screws] What are the advantages of titanium screws over traditional screws?

Arconic develops new titanium alloy for high-temperature aerospace applications

Arconic recently announced that it has developed and commercially licensed an advanced titanium alloy called ARCONIC-THOR. ARCONIC-THOR is a new, lighter and more cost-effective titanium alloy to replace current nickel-based super alloys, which are designed for high-temperature applications in next-generation aerospace engines and adjacent structures. This patented titanium alloy is 50% lighter than current nickel-based alloys, making it more suitable for use in high-temperature resistant aero engines and adjacent structures, and will provide cost savings to customers, allowing the company to capture the needs of the engine and airframe materials market.


ARCONIC-THOR is a breakthrough aerospace material with properties not found in traditional alloys, according to Jeremy Halford, president of Arconic Engineered Structures. The widespread use of next-generation fuel-efficient aero-engines presents a challenge for material selection for exhaust system materials and adjacent structures. Using our materials science expertise, our engineers developed ARCONIC-THOR, a robust titanium solution that can withstand the heat and considerable weight, providing cost savings to our customers.


Within Arconic's proprietary alloy range, the special patented formulation offers a three-fold increase in oxidation resistance compared to existing high-temperature alloys. This improved oxidation resistance prevents material deterioration at elevated temperatures and allows the ARCONIC-THOR alloy to operate better at durable temperatures compared to other conventional titanium alloys on the market.


Arconic has worked with customers on development projects ARCONIC-THOR, including Boeing, a manufacturer of aircraft programs funded by the U.S. Air Force Research Laboratory, and Honeywell, an aircraft engine manufacturer, in which we use ARCONIC-THOR sheet to produce all of our large components. The Joint Materials Affordability Initiative (MAI) project validated ARCONIC-THOR as a producible, high oxidation resistance titanium alloy with acceptable oxidation resistance at temperatures up to and beyond 200°F. The project further concluded that ARCONIC-THOR significantly reduces weight and improves component performance.


The Society of Automotive Engineers - Aerospace Materials Specification Committee on Titanium and Refractory Metals (SAE-AMS) recently approved Standard Aerospace Materials Specification (AMS) 6953 for ARCONIC-THOR sheet.


ARCONIC-THOR can produce thin and thick plates, foils, billets, rolled rings, forgings and extrusions. It is formable (cold, hot, superplastic), heat treatable, forgeable, and weldable.

How to identify titanium alloy?

Accurate identification generally requires professional instruments. The kind that measures the metal components. What is the identification of everyday titanium alloy? The following Jinfu titanium small to introduce you to several major methods of identification methods.


1, specific gravity: the specific gravity of titanium alloy in about 4.55, is usually 57% of the stainless steel, from the feel of the easier to distinguish.


2, color: titanium alloy metal color is off-white, color texture is different from stainless steel, aluminum alloy. Because titanium alloy is more difficult to polish, coloring, so the surface of titanium alloy products are usually mechanical polishing or sanding, only a few high-grade titanium alloy products partially polished mirror light. And mechanical polishing and sanding surface color is titanium alloy unique gray or dark gray.


3, strength: titanium alloy strength is higher than the general stainless steel and aluminum alloy, can reach two times the stainless steel.

What are the main uses of titanium alloy?

Titanium is an important structural metal developed in the 1950s. Titanium alloys are widely used in various fields because of their high strength, good corrosion resistance and high heat resistance. Many countries in the world have recognized the importance of titanium alloy materials, and successively researched and developed them and got practical applications. 1950s to 1960s, mainly the development of high-temperature titanium alloys for aircraft engines and structural titanium alloys for airframes, the 1970s developed a number of corrosion-resistant titanium alloys, since the 1980s, corrosion-resistant titanium alloys and high-strength titanium alloys have been further developed. Titanium alloy is mainly used to make aircraft engine compressor parts, followed by structural parts for rockets, missiles and high-speed aircraft.


Titanium alloy has high strength and low density, good mechanical properties, good toughness and corrosion resistance. In addition, titanium alloys have poor process performance, difficult cutting and machining, and very easy to absorb impurities such as hydrogen, oxygen, nitrogen and carbon in thermal processing. There is also poor anti-wear properties and complex production process. The industrial production of titanium was started in 1948. The need for the development of the aviation industry, the titanium industry to an average annual growth rate of about 8%. The annual output of titanium alloy processing material in the world has reached more than 40,000 tons, and there are nearly 30 kinds of titanium alloy grades. The most widely used titanium alloys are Ti-6Al-4V (TC4), Ti-5Al-2.5Sn (TA7) and industrial pure titanium (TA1, TA2 and TA3).


Titanium alloys are mainly used to make aircraft engine compressor parts, followed by structural parts for rockets, missiles and high-speed aircraft. in the mid-1960s, titanium and its alloys have been used in general industry to make electrodes for the electrolysis industry, condensers for power stations, heaters for petroleum refining and seawater desalination, and environmental pollution control devices. Titanium and its alloys have become a corrosion-resistant structural material. They are also used to produce hydrogen storage materials and shape memory alloys.

Classification, organization and properties of TC4 titanium alloy

Titanium alloy fasteners are the most advantageous trump card industry of Jinfu Titanium Industry. Our standard titanium alloy fasteners are manufactured by adopting national standard, international standard, German standard, Japanese standard and other industry standards, using international advanced equipment and mastering the world's leading process technology. The company has molds for producing various types of fasteners, and the products are of various categories, including machine screws, self-tapping screws, set screws, rivets and welding nails, etc. There are more than ten kinds of fasteners. The quality of titanium alloy fasteners manufactured by Jinfu is unmatched by anyone, and at the same time, we guarantee to provide you with the most favorable price as the first-hand manufacturer, eliminating the middleman's price difference, so as to achieve the real "low price and high quality", welcome new and old customers to inquire.


There are only three types of titanium alloys by organization, namely alpha, (alpha + beta) and beta. Among them, α and β type titanium alloy crystalline shape remains unchanged after heating and cooling, only in the (α + β) type titanium alloy containing a certain range of alloying elements, the heating temperature is higher than the phase transition temperature, rapid cooling β phase with martensite transformation. Due to the different heating temperatures and cooling rates, a variety of different microstructures will be obtained, and therefore have different mechanical properties. This is important, the use of titanium alloys to produce a variety of equipment, parts, such as thermal effects, must consider the issue of phase transformation in the alloy.


TC4 titanium alloy heated to 1020 degrees, the high temperature microstructure of the alloy is a single-phase β composition, a solid solution. When quenched at different cooling rates, such as quenching in water, cooling in air and cooling with the furnace, the microstructure obtained is different, quenching in water (WQ) organization for martensite α '+ β phase, cooling in air (AC) organization for the needle α + β phase and the original β grain boundary phase, cooling with the furnace (FC) organization for the strip α + β phase and the original β phase grain boundary.


As in the above case, the microstructure obtained after cooling at different cooling rates differs when heated to 950 and 850 degrees C. At 950 degrees C, the water quenching (WQ) organization is incipient equiaxed α phase and α'+β phase, the cooling in air (AC) organization is incipient equiaxed α phase and needle-like β phase, and the cooling with the furnace (FC) organization is equiaxed α phase At 850 degrees, the water quenching (WQ) organization is incipient equiaxed α-phase and sub-stable β-phase, and the cooling in air (AC) organization is incipient equiaxed α-phase and transformed β-phase.


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Applications, materials and composition of TA9 titanium alloy

Titanium is a new metal, the performance of titanium is related to the content of impurities such as carbon, nitrogen, hydrogen, oxygen, etc. The impurity content of pure titanium iodide is not more than 0.1%, but its strength is low and plasticity is high. 99.5% industrial pure titanium has the following properties: density ρ=4.5g/cm3, melting point 1800℃, thermal conductivity λ=15.24W/(m.K), tensile strength σb=539MPa, elongation δ=25%, sectional shrinkage ψ=25%, modulus of elasticity E=1.078×105MPa, and hardness HB195.


(1)High specific strength


The density of titanium alloy is generally around 4.5g/cm3, only 60% of steel, the strength of pure titanium is close to the strength of ordinary steel, some high strength titanium alloy exceeds the strength of many alloy structural steel. Therefore, the specific strength (strength / density) of titanium alloy is much greater than other metal structural materials, can be made of high strength, good rigidity, light weight parts, components. At present, the aircraft engine components, skeleton, skin, fasteners and landing gear, etc. are used titanium alloy.


(2) High thermal strength


The use of temperature than the aluminum alloy several hundred degrees, in the medium temperature can still maintain the required strength, can be in 450 ~ 500 ℃ temperature long-term work of these two types of titanium alloys in 150 ℃ ~ 500 ℃ range still has a very high than the strength, while the aluminum alloy in 150 ℃ than the strength dropped significantly. The working temperature of titanium alloy can reach 500℃, while aluminum alloy is below 200℃.


(3)Good corrosion resistance


Titanium alloy working in the humid atmosphere and seawater medium, its corrosion resistance is far better than stainless steel; pitting, acid corrosion, stress corrosion resistance is particularly strong; excellent corrosion resistance to alkali, chloride, chlorine organic substances, sulfuric acid, etc.. But titanium has a reduction of oxygen and chromium salt media corrosion resistance is poor.


(4)Good low temperature performance


Titanium alloy in low temperature and ultra-low temperature, can still maintain its mechanical properties. Good low-temperature performance, the gap element is very low titanium alloy, such as TA7, in -253 ℃ can also maintain a certain degree of plasticity. Therefore, titanium alloy is also an important low-temperature structural materials.


(5) Chemical activity is large


The chemical activity of titanium is large, and the atmosphere O, N, H, CO, CO2, water vapor, ammonia, etc. produce strong chemical reaction. When the carbon content is greater than 0.2%, it will form hard TiC in titanium alloy; when the temperature is higher, the action with N will also form TiN hard surface layer; above 600 ℃, titanium absorbs oxygen to form a hardened layer with high hardness; hydrogen content rises, it will also form a brittle layer. Absorption of gas and the resulting hard and brittle surface layer depth of up to 0.1 ~ 0.15 mm, the degree of hardening of 20% to 30%. The chemical affinity of titanium is also large, easy to produce adhesion phenomena with the friction surface.


(6) Small thermal conductivity, small modulus of elasticity


The thermal conductivity of titanium λ=15.24W/(m.K) is about 1/4 of nickel, 1/5 of iron and 1/14 of aluminum, while the thermal conductivity of various titanium alloys is about 50% lower than that of titanium. The modulus of elasticity of titanium alloy is about 2 to 3 times that of stainless steel, causing severe friction, adhesion and bonding wear on the tool's rear face.


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What are the advantages of titanium screws over traditional screws?

Shanghai Jinfu Titanium Manufacturing Factory was established in 2006, is a professional manufacturer of titanium alloy and related products, known for its high technology and high level of craftsmanship, with more than ten years of experience in self-sufficient research and development, production and sales, is "China's first titanium alloy specialty". At present, Jinfu's product line includes titanium alloy standard parts, non-standard parts, surface treatment, kitchenware, household products, etc., involving civil, military, nuclear power, medical and other fields.


Titanium alloy fasteners are the most advantageous trump card industry of Jinfu Titanium Industry. Our standard titanium alloy fasteners are manufactured by adopting national standard, international standard, German standard, Japanese standard and other industry standards, using international advanced equipment and mastering the world's leading process technology. The company has molds for producing various types of fasteners, and the products are of various categories, including machine screws, self-tapping screws, set screws, rivets and welding nails, etc. There are more than ten kinds of fasteners. The quality of titanium alloy fasteners manufactured by Jinfu is unmatched by anyone, and at the same time, we guarantee to provide you with the most favorable price as the first-hand manufacturer, eliminating the middleman's price difference, so as to achieve the real "low price and high quality", welcome new and old customers to inquire.


There are only three types of titanium alloys by organization, namely alpha, (alpha + beta) and beta.


As a raw material element for the production of titanium screws, titanium is a very active metal, compared with the traditional stainless steel, titanium screws have better flexibility and oxidation resistance.


More widely used in various industries, ordinary stainless steel screws in high-pressure environment compared with titanium screws, titanium screws are more resistant to pressure, so in the aerospace metal, titanium alloy is chosen to make, titanium screws as one of the connections.


Titanium screws and material advantages.


1, low density, high specific strength: titanium metal density of 4.51g/cm3, higher than aluminum and lower than steel, copper, nickel, but the specific strength is located at the top of the metal.


2, corrosion resistance: titanium is a very active metal, its equilibrium potential is very low, the thermodynamic corrosion tendency in the medium. But in fact, titanium in many media is very stable, such as titanium in oxidizing, neutral and weakly reducing media is resistant to corrosion.


3, good heat resistance: the new titanium alloy can be used for a long time at 600 ℃ or higher.


4, good low-temperature resistance: titanium alloy TA7 (Ti-5Al-2.5Sn), TC4 (Ti-6Al-4V) and Ti-2.5Zr-1.5Mo and other low-temperature titanium alloys represented by its strength increases with the decrease in temperature, but the plasticity change is not large. In -196-253 ℃ low temperature to maintain good ductility and toughness, to avoid the metal cold brittleness, is the ideal material for low temperature containers, storage tanks and other equipment.


5, strong damping resistance: titanium metal by mechanical vibration, electrical vibration, compared with steel, copper metal, its own vibration decay time is long.


6, non-magnetic, non-toxic: titanium is a non-magnetic metal, in a large magnetic field will not be magnetized, non-toxic and have good compatibility with human tissue and blood, so the medical community used.


7, tensile strength is close to its yield strength: this property of titanium illustrates its high yield strength ratio (tensile strength / yield strength), indicating the poor plastic deformation of titanium metal materials during forming. Due to the large ratio of the yield limit of titanium to the modulus of elasticity, so that titanium forming when the rebound capacity is large.


8, good heat transfer performance: titanium metal, although the thermal conductivity than carbon steel and copper low, but because of titanium's excellent corrosion resistance, so the wall thickness can be greatly reduced, and the surface and steam heat transfer in the form of drop condensation, reducing the heat group, too the surface does not scale can also reduce thermal resistance, so that the heat transfer performance of titanium significantly improved.


9, low modulus of elasticity: titanium's modulus of elasticity at room temperature is 106.4 high standard a, 57% of steel.


10, gas absorption performance: titanium screw is a chemically very active metal, at high temperatures can react with many elements and compounds. Titanium gas absorption mainly refers to the reaction with carbon, hydrogen, nitrogen and oxygen at high temperatures.


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Research and realization of titanium nut defect

Titanium nut surface defect detection technology is one of the key technologies to improve the competitiveness of enterprise products and improve the production process, while the traditional surface defect detection technology is difficult to meet the high-speed production needs, the implementation of machine vision-based titanium nut online inspection system to ensure the efficiency and accuracy of immediate inspection parts.


  At present, although there are vision inspection systems used in industrial production, the machine vision-based online inspection technology for surface defects of titanium nuts is still in the research and development stage in China.


  This project takes the high-speed inspection of titanium nuts as an example object, and studies the key algorithm of titanium nut defect detection based on machine vision, and deeply studies the titanium nut edge detection and area segmentation algorithm, and conducts experimental analysis of various algorithms.


  The specific research content is divided into the following points.


  1. image pre-processing: this paper firstly conducts a pre-processing study on the titanium nut images obtained online.


  Pre-processing is an important pre-processing work for image processing and analysis, which directly affects the accuracy of image processing.


  Image pre-processing includes two parts: filtering (denoising) and enhancement. In this paper, the classification and model of image noise are introduced, and the classical filtering methods are introduced in detail and analyzed experimentally, and then various image enhancement algorithms such as histogram equalization, Butterworth filtering and fuzzy theory-based image enhancement algorithms are used to process the titanium nut images respectively, and the experimental results are compared and analyzed.


  2. Image segmentation: This paper is divided into two parts: image target segmentation and target region segmentation.


  The image target segmentation aims to extract the whole titanium nut from the background, and the target region segmentation is to accurately segment the extracted titanium nut image to separate the bore, end face and gear parts.


  In the process of image segmentation algorithm research, the image processing to be used are: pre-processing, titanium nut edge detection, titanium nut target extraction, titanium nut region segmentation, defect feature extraction, etc. Among them, pre-processing will use the first part of the experiment to derive part of the pre-processing algorithm and their combination, titanium nut target extraction segmentation using edge detection-based image segmentation technology, titanium nut region segmentation using a combination of fuzzy The final result is the complete extraction of different regional features of the titanium nut, which is the focus of this paper.


  3. Defect detection: titanium nut surface defects including end defects, defects in the hole, gear defects three parts. In this paper, first of all, the detailed defect classification is carried out for different regions.


  Then, combined with SVM theory, for each defect, multiple features and their fusion features are extracted and used in the SVM classifier to detect and identify the corresponding defects.


  Finally, based on the experimental results, the detection rate of each feature is compared, and the optimal solution for titanium nut defect detection is proposed on this basis.


  4. Test experiment: In order to apply the above algorithm theory to the titanium nut appearance defect detection system, this paper combined with the laboratory platform to conduct the corresponding test experiments to verify the effectiveness and real-time algorithm.