Small density, high specific strength
The density of titanium is 4.51g/cm3, higher than aluminum and lower than steel, copper, nickel, but the specific strength is located in the first metal.
Corrosion resistance
Titanium is a very open metal, its equilibrium potential difference is very low, in the medium of thermodynamic corrosion tendency. But in fact titanium is very smooth in many media, such as titanium is corrosion resistant in oxidizing, neutral and weakly reducing media. This is because titanium and oxygen have a great affinity, in the air or oxygen-containing media, titanium surface to form a layer of high-density, strong adhesion, plasticity of the oxidized film, maintenance of the titanium substrate is not corroded. Even if it is damaged by mechanical abrasion, it will soon heal or regenerate again. This shows that titanium tubes are metals with a pronounced tendency to passivate. This characteristic is maintained by the oxide film of titanium up to a medium temperature of 315°C.
In order to improve the corrosion resistance of titanium, we have developed surface treatment technologies such as oxidation, electroplating, plasma spraying, ion nitriding, ion implantation, and laser treatment, which improve the defensive effect of the titanium oxide film, and have obtained the desired corrosion-resistant results. We have developed a series of corrosion-resistant titanium alloys such as titanium-molybdenum, titanium-palladium, and titanium-molybdenum-nickel to meet the needs of metal materials used in the production of hydrochloric acid, hydrochloric acid, methylamine solution, high-temperature wet chlorine gas, and high-temperature chlorine. Titanium casting application of titanium-32 molybdenum aluminum alloy, often produce crevice corrosion or pitting corrosion environment application of titanium-0.3 molybdenum-0.8 nickel-based alloy or titanium equipment, part of the application of titanium-0.2 palladium aluminum alloy, are very good application of the actual results.
Good heat resistance
The new titanium alloys can be used for a long time under the temperature of 600℃ or higher.
Good low-temperature resistance
Titanium alloys TA7 (Ti-5Al-2.5Sn), TC4 (Ti-6Al-4V) and Ti-2.5Zr-1.5Co are ultra-low-temperature titanium alloys, whose compressive strength increases as the temperature decreases, but the plastic transformation is not large. In -196-253 ℃ ultra-low temperature to maintain good ductility and ductility, to prevent the metal cold ductility, is ultra-low-temperature vessels, storage tanks and other machinery and equipment idealization of the material.
Strong anti-vibration performance
When titanium metal is subjected to mechanical and electrical vibration, its vibration decay time is the longest compared to steel and copper. This property of titanium can be used as tuning fork, ultrasonic pulverizer vibration element in medicine and vibration film of high-level audio speakers.
Non-magnetic, non-toxic
Titanium is a non-magnetic metal, in a very large magnetic field is not easy to be magnetized, non-toxic and good compatibility with human tissue and blood night, so by the medical profession to choose.
Tensile strength is similar between the two.
This property of titanium indicates a high flexural strength ratio (tensile strength/tensile strength), which indicates poor plastic deformation of titanium metal during molding. Because the ratio of the yield limit to the modulus of elasticity of titanium is large, it gives titanium a large ability to work with resilience when molding.
Good heat transfer performance
Although the thermal conductivity of titanium metal is lower than that of carbon steel and copper, the wall thickness can be greatly reduced because of the excellent corrosion resistance of titanium, and the heat transfer method between the surface and the vapor is droplet cold suspicion, which reduces the heat group, and the heat transfer coefficient can be reduced by not accumulating the scale on the surface, so the heat transfer performance of titanium can be significantly improved.
Low modulus of elasticity
The modulus of elasticity of titanium is 106.4gMPa at room temperature, which is 57% of that of steel.
Breathing properties
Titanium is a kind of metal with very cheerful physical properties, which can reflect with many elements and chemical substances at high temperature. Titanium breathing key refers to high temperature and carbon, hydrogen, nitrogen, oxygen to produce reflection.
