Types and advantages of titanium screws

Titanium screws are a tooling concept with the classification of round head screws, self-tapping screws, hexagonal screws, countersunk head screws, monobloc screws, etc. According to the needs of manufacturers, different specifications and types of titanium screws can be customized to meet the requirements. Generally speaking, as titanium is more expensive, the price of titanium screws is correspondingly a little more expensive than ordinary kinds of metal screws, so why should we choose titanium screws?


  Ordinary stainless steel screws in a high-pressure environment compared with titanium screws, titanium screws are more resistant to pressure, so in the aerospace metal, will choose titanium alloy 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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