1.The low density, high specific strength: titanium metal density is 4.51g/cm3, higher than that of aluminum, copper, nickel and less than steel, but in the first metal strength.
2.The corrosion resistance of the: titanium is a kind of very active metal, its equilibrium potential is very low, the corrosion tendency of thermodynamics in the medium high. But in fact the titanium very stable in many media, such as titanium in oxidation resistance, neutral and weak reducing medium is resistant to corrosion.
3.The heat resistant performance is good: the new titanium alloy can be used for a long time at a temperature of 600 DEG C or higher temperature.
4.The good low temperature resistance: TA7 titanium alloy (Ti-5Al-2.5Sn), TC4 (Ti-6Al-4V) cryogenic titanium alloy and Ti-2.5Zr-1.5Mo as the representative, its strength increased with the decrease of temperature, but the plastic has hardly changed. Keep good ductility and toughness in the -196-253 degrees Celsius temperature, avoid metal cold brittleness, is the ideal material for cryogenic vessel, tank and other equipment.
5.The anti damping performances: titanium is affected by mechanical vibration, electric vibration, compared with steel, copper metal, its vibration attenuation for the longest time.
6.The non magnetic, non-toxic: titanium is non-magnetic metal, in a large magnetic field will not be magnetized, non-toxic and human tissue and blood compatibility good, so is the medical community by.
7.The tensile strength and yield strength near: this property of titanium shows its ratio of yield strength (tensile strength / yield strength) high, said metal titanium material in forming poor plastic deformation. The ratio of titanium yield limit and elastic modulus, the springback of titanium forming large.
8.The heat transfer performance is good: the coefficient of thermal conductivity of metallic titanium although than carbon steel and copper is low, but because of the corrosion resistance of titanium excellent, so thin wall thickness can be greatly reduced, and the surface and the steam heat transfer mode for dropwise condensation, reducing the heat group, too surface scaling can also reduce the thermal resistance. The heat transfer performance of titanium was significantly improved.
9.The low elastic modulus: elastic modulus titanium at room temperature for 106.4GMPa, 57% for steel.
10.The inspiratory resistance: titanium is a kind of chemical properties are very active metals, react with many elements and compounds at high temperature. Titanium gettering mainly refers to the high temperature and carbon, hydrogen, nitrogen, oxygen reaction.
The three major functions of titanium
Functional materials is mainly to physical properties of engineering materials, which has special properties in electric, magnetic, acoustic, optical, thermal and other aspects, or in its effect shows special functional materials. Study of titanium and titanium alloy has been the discovery of the three special functions of promising:
1. memory function: titanium nickel alloy with unidirectional, bidirectional and a full range of memory effect in a certain temperature, is recognized as the best memory alloy. Do a pipe joint used for oil pressure system of fighter in engineering; oil pipeline system combined oil enterprises; 500mm diameter parabolic mesh antenna diameter 0.5mm wire mesh used for aerospace vehicle; used for making snoring treatment in medical engineering; made screw for fracture healing. The applications are obtained obvious effect.
2.Function: superconducting niobium - titanium alloy is lower than the critical temperature in temperature, showing a superconducting zero resistance.
3 hydrogen storage function: characteristics of hydrogen absorption of Ti Fe alloy has put a lot of hydrogen safety storage, in a certain environment and the hydrogen release. This in the separation of hydrogen, hydrogen purification, hydrogen storage and transportation, manufacturing to a hydrogen energy heat pump and accumulator aspects of application of promising.
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