Titanium alloy has high strength and low density, good mechanical properties, toughness and corrosion resistance is very good. In addition, titanium alloys have poor process performance, cutting and processing difficulties, in hot processing, very easy to absorb impurities such as hydrogen, oxygen, nitrogen and carbon. There is also poor abrasion resistance, the production process is complex. The industrialized production of titanium was started in 1948. The needs of the aviation industry development, so that the titanium industry to an average annual growth rate of about 8% development. At present, the world's annual output of titanium alloy processing materials has reached more than 40,000 tons, titanium alloy grade nearly 30 kinds. The most widely used titanium alloy is Ti-6Al-4V (TC4), Ti-5Al-2.5Sn (TA7) and industrial pure titanium (TA1, TA2 and TA3).
Titanium alloys are mainly used to make aircraft engine compressor components, titanium alloys followed by rockets, missiles and high-speed aircraft structural components. in the mid-1960s, titanium and its alloys have been used in general industrial applications, used to make electrodes for the electrolysis industry, condensers for power stations, heaters for petroleum refineries and seawater desalination, and environmental pollution control devices. Titanium and its alloys have become a corrosion-resistant structural material. It is also used to produce hydrogen storage materials and shape memory alloys.
Titanium alloy is a new important structural material used in the aerospace industry, specific gravity, strength and use of temperature between aluminum and steel, but higher than the strength and has excellent resistance to seawater corrosion and ultra-low temperature performance. Titanium alloy in 1950 the United States for the first time in the F-84 fighter-bomber used as the rear fuselage heat shield, wind shield, tail cowl and other non-bearing components. 60 years the beginning of the use of titanium alloys from the rear fuselage to the center fuselage, partially instead of structural steel manufacturing spacer frames, beams, flaps, slide rails, and other important load-bearing components. The use of titanium alloy in military aircraft increased rapidly, reaching 20% to 25% of the weight of the aircraft structure.
Since the 1970s, titanium alloy civil aircraft began to use titanium alloy in large quantities, such as the Boeing 747 airliner with titanium amounted to more than 3640 kilograms. Mach number less than 2.5 aircraft with titanium is mainly to replace steel to reduce structural weight. Another example, the United States SR-71 high-altitude high-speed reconnaissance aircraft (flight Mach 3, flight altitude of 26,212 meters), titanium accounted for 93% of the weight of the structure of the aircraft, known as "all titanium" aircraft. When the aero-engine thrust-to-weight ratio from 4 to 6 to 8 to 10, the pressurized gas outlet temperature correspondingly increased from 200 to 300 ° C to 500 to 600 ° C, titanium alloy originally made of aluminum low-pressure pressurized gas discs and blades must be changed to titanium alloy, or titanium instead of stainless steel to manufacture high-pressure pressurized gas discs and blades, in order to reduce the weight of the structure.
In the 1970s, the amount of titanium alloy in the aviation engine generally accounted for 20% to 30% of the total weight of the structure, mainly used in the manufacture of pressurized parts, such as forged titanium fans, pressurized air discs and blades, cast titanium pressurized air receiver, intermediary receiver, bearing shells, etc.. Spacecraft mainly use titanium alloys of high strength, corrosion resistance and low temperature resistance to manufacture a variety of pressure vessels, fuel storage tanks, fasteners, instrument straps, frames and rocket shells. Artificial Earth satellites, moon landing module, manned spacecraft and space shuttles also use titanium alloy plate weldments.
Your message must be between 20-3,000 characters!