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Excellent properties of titanium metal

Excellent properties of titanium metal

Titanium excellent performance

First, the density of small, high strength

The density of titanium metal is 4.51g / cm3, higher than that of aluminum and lower than that of steel, copper and nickel, but the specific strength lies at the top of metal.

Second, corrosion resistance

Titanium is a very lively metal with a very low equilibrium potential and a high tendency for thermodynamic corrosion in the medium. However, titanium is actually very stable in many media, such as titanium, which is resistant to corrosion in media such as oxidizing, neutral and weakly reducing. This is because titanium and oxygen have a great affinity, in the air or oxygen containing medium, the titanium surface to generate a dense, strong adhesion, inert large oxide film, the titanium substrate is protected from corrosion. Even self-healing or regenerating quickly due to mechanical wear. This shows that titanium is a metal with a strong tendency to passivation. Dielectric temperature below 315 ℃ titanium oxide film has always maintained this feature.

timg.jpgIn order to improve the corrosion resistance of titanium, surface treatment technologies such as oxidation, electroplating, plasma spraying, ion nitriding, ion implantation and laser treatment have been developed to enhance the protective effect of the titanium oxide film and obtain the desired corrosion resistance effect. In response to the needs of metal materials in the production of sulfuric acid, hydrochloric acid, methylamine solution, high temperature wet chlorine and high temperature chlorides, a series of corrosion resistant titanium alloys such as titanium-molybdenum, titanium-palladium and titanium-molybdenum-nickel have been developed. Titanium-32 molybdenum alloy is used for titanium casting, and titanium-0.2 molybdenum-0.8 nickel alloy or titanium equipment is used for titanium-0.2 palladium alloy for the environment where crevice corrosion or pitting corrosion often occurs, and both are well used effect.

Third, good heat resistance

The new titanium alloy can be long-term use at 600 ℃ or higher temperature.

Fourth, low temperature performance is good

Titanium alloy TA7 (Ti-5Al-2.5Sn), TC4 (Ti-6Al-4V) and Ti-2.5Zr-1.5Mo and other low-temperature titanium alloy represented by its strength decreases with decreasing temperature, but the plasticity is not Big. In the -196-253 ℃ low temperature to maintain good ductility and toughness, to avoid the metal cold brittleness, low temperature containers, tanks and other equipment ideal material.

Fifth, anti-damping performance

Titanium metal by mechanical vibration, electrical vibration, compared with steel, copper metal, the longest vibration decay time. The use of titanium for this performance can be used as a tuning fork, medical ultrasonic vibration elements and advanced audio speakers vibrating membrane.

Sixth, non-magnetic, non-toxic

Titanium is a non-magnetic metal that can not be magnetized in a large magnetic field. It is non-toxic and has good compatibility with human tissues and blood. Therefore, titanium is used in the medical field.

Seven, tensile strength and yield strength close to

This property of titanium shows that its yield ratio (tensile strength / yield strength) is high, indicating that the metallic titanium material has poor plastic deformation upon forming. Due to the titanium yield strength and elastic modulus of the ratio of large, the resilience of titanium molding large.

Eight, good heat transfer performance

Although the thermal conductivity of titanium metal than carbon steel and copper is low, but due to titanium excellent corrosion resistance, so the wall thickness can be greatly reduced, and the surface and steam heat transfer mode drops condensate, reducing the heat group, too the surface Not scaling can also reduce the thermal resistance, so that the heat transfer performance of titanium significantly improved.

Nine, low modulus of elasticity

The modulus of elasticity of titanium at room temperature is 106.4GMPa, 57% of steel.

Ten, breathing performance

Titanium is a chemically very reactive metal that reacts with many elements and compounds at high temperatures. Titanium suction mainly refers to high temperature and carbon, hydrogen, nitrogen, oxygen reaction.

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