titanium alloy plate is a new and important structural

Titanium is a new and important structural materials used in the aerospace industry , the proportion between the aluminum and steel , strength and temperature ranged , Medical grade titanium alloy but has high strength and excellent resistance than seawater corrosion and ultra- low temperature performance. In 1950 the United States for the first time in the F-84 fighter-bombers used after the fuselage insulation panels, wind shield , tail cover other non- load-bearing components. 1960s began using parts from titanium alloy fuselage toward the rear of the fuselage , in part, to replace structural steel bulkheads , beams, rails and other important flap bearing components . The amount of titanium in military aircraft is increasing rapidly , reaching 20 % to 25% by weight of the aircraft structure . Since the 1970s , began extensive use of titanium civilian aircraft such as the Boeing 747 aircraft with a capacity of 3640 kg or more of titanium . Aircraft Mach number of less than 2.5 primarily to replace the titanium steel , to reduce structural weight . Again , the U.S. SR-71 high-altitude reconnaissance aircraft speed ( Mach 3 at an altitude of 26,212 meters ) , 93% titanium by weight of the aircraft structure , known as " all-titanium " aircraft . When the weight ratio of aircraft engines, increased from 4-6 to 8-10 , a corresponding outlet temperature from compressor 200 ~ 300 ° C to 500 ~ 600 ° C , medical grade titanium the original plate is made of aluminum and the blades of the low pressure compressor must switch to titanium , or titanium instead of stainless steel plate and high-pressure compressor blades in order to reduce the structural weight . 1970s, the amount of titanium in the general aviation engines accounted for 20% to 30% of the total weight of the structure is mainly used in the manufacture of compressor components such as forged titanium fan, compressor discs and blades, cast titanium compressor casing , intermediate casing, bearing housing and so on. The main advantage of the spacecraft 's high- strength titanium alloy , corrosion resistance and low temperature performance to manufacture all kinds of pressure vessels, fuel tanks , fasteners, instrument straps, architecture and rocket shells. Sputnik , the lunar module , manned spaceship and space shuttles are also using titanium plates welded .