Titanium rod has high strength, low density, good mechanical function, good endurance and corrosion resistance. Other, titanium alloy process function is poor, cutting difficult, in hot processing, very simple absorption of hydrogen, oxygen, nitrogen, carbon and other impurities. There is poor resistance to wear, production process is messy. Industrial production of titanium began in 1948. Aviation industry to develop the demand, so that the titanium industry at an average annual growth rate of about 8%.
Currently, the annual output of international titanium alloy processing materials has reached more than 40,000 tons, nearly 30 kinds of titanium alloy trademarks. The more 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 used primarily for aircraft engine compressor components, followed by rocket, missile and high-speed aircraft layouts. By the mid-1960s, titanium and its alloys were in common industrial use, making electrodes for electrolysis, condensers for power stations, heaters for oil extraction and desalination, and pollution control equipment. Titanium and its alloys have become a kind of corrosion resistant layout data.
In addition, it is also used to produce hydrogen storage data and shape recall alloy. Titanium alloy is a new important layout data used in aerospace industry, its specific gravity, strength and application temperature are between aluminum and steel, but it has high specific strength and excellent anti-seawater corrosion function and ultra-low temperature function. The amount of titanium alloy used in aero engine usually accounts for 20% ~ 30% of the total weight of the layout. It is mainly used to make compressor components, such as cast titanium fan, compressor disc and blade, cast titanium compressor casing, intermediate casing, bearing shell, etc. Spacecraft first use of titanium alloy high specific strength, corrosion resistance and low temperature resistance function to make a variety of pressure vessels, fuel storage tanks, fasteners, instrument binding, framework and rocket shell. Artificial earth satellite, lunar module, manned spacecraft and space shuttle are also using titanium alloy plate welding.