The application of titanium metal in the aerospace

Than the strength of titanium and its alloys (strength and weight ratio) in metal structure material is very high, it has the strength of steel, but its weight is only 57% of the steel.In addition, titanium and its alloy heat resistance is very strong, in the 500 ℃ in the atmosphere can still maintain good strength and stability, short time working temperature is even higher.At 150 ℃, stainless steel and aluminum lose in 310 ℃, its mechanical performance.When aircraft, missiles, rocket speed, the engine and the surface temperature is quite high, aluminum alloy has not up to, at this moment, using titanium alloy is very appropriate.It is because of titanium and its alloys have great strength, light weight, strong comprehensive excellent properties of heat resistance, use it instead of other metals in aircraft manufacturing, not only can prolong the service life of the aircraft, but also can reduce the Weight, there by significantly improve the flight performance.So, titanium is aviation industry and industry one of the most promising structural materials in the universe.Titanium and its alloys in aviation industry is mainly used in the manufacture of aircraft engine and the fuselage.Generally speaking, the Mach number is less than the engine using titanium and its alloys, the fuselage with aluminum alloy.Mach number is equal to 2 aircraft, the engine with titanium content increased, and the fuselage is titanium parts.Mach number is greater than 3.5, the engine inlet temperature is very high, can't use super alloy, titanium alloy and need amount but the fuselage with titanium is increased significantly.
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Titanium production of about 40% ~ 40% for the aviation industry, followed by military and civil.Such as the United States in b-1 bomber body structure of the material, the titanium alloy accounted for about 21%, mainly used in the manufacture of the fuselage, wing, skin and bearing components.A Boeing 747 aircraft, 42.7 tons of titanium, 777 aircraft, 57 tons of titanium, 777 er aircraft with titanium even as high as 68 tons, the F - 15 fighter with titanium, up to 24.5 tons.McDonnell Douglas (Mc - o 'donnell - Dounlas) the company produces the DC10 aircraft, titanium alloy dosage of 5500 kg, accounted for more than 10% by weight of the structure.The dosage of the titanium in high-performance aircraft is very handsome, generally accounts for about 22.5% by weight of the engine, 6% of the airframe.Especially in military aircraft, titanium application a considerable proportion in the whole structure of the material: F - 14 to 15 F, F - 18 hornet, F - 117 nighthawk bombers, B, B - 1-2 bomber in the proportion of titanium, in turn, 24%, 27%, 13%, 25%, 22% and 26%, and F - 22 fighter with titanium content accounted for 42% of the whole aircraft weight.How visible titanium in important position.Use of titanium in supersonic aircraft amount to account for 95% of its total weight structure, reason has "titanium aircraft," said, so, if there is no development of titanium alloys is hard to the supersonic aircraft."Titanium aircraft" that can reduce the body weight of 5 t, carrying more than 100 passengers.In the new type of jet engine, titanium alloy is 18% ~ 25% of the total engine weight.At present, more than about half of the world's titanium, important parts used in the manufacture of aircraft body and the jet engine.