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Titanium Use Alloy In The Field Of Aviation
Sep 14, 2016

What parts use titanium alloy in the field of aviation



Titanium alloy material used in aviation, aerospace area is called titanium alloy castings. Application is very extensive, not only have joint, also have some riveting pieces and casting. Titanium alloy is mainly used for: production of aircraft engine compressor components, followed by the rockets and missiles and high-speed plane structural parts.



In the middle of the 60s, titanium and its alloy has been applied in the general industrial, used for making electrode of electrolysis industry, power plant condenser, oil refining and seawater desalination heater and environmental pollution control devices, etc. Titanium and its alloy has become a corrosion resistant structure materials. In addition, for the production of hydrogen storage material and shape memory alloy, etc. Titanium alloy is used in the aerospace industry and is a new important structural materials, density, the intensity and the temperature is between aluminum and steel, but high strength and have excellent corrosion resistance to seawater and ultra-low temperature performance.



In 1950, the United States for the first time on the F-84 fighter-bombers, used as a body heat insulation board, ventilation hood, and tail fairing, these Non-load-bearing components. In the 60s the use of titanium alloy used parts moved from the aft fuselage to the middle fuselage, partly instead of steel manufacturing frame beam, the flaps slide rail, and other important bearing components. Rapid increase its application in the amount of titanium alloy in military aircraft, reached 20%~25% of the weight of aircraft structure. Since from the 70s, civil aircraft began extensive use titanium alloy, such as the Boeing 747 which use titanium quantity reached 3640kg. Aircraft which Mach number less than 2.5 mainly use titanium to replace steel, in order to reduce the structure weight. As another example, the SR-71 high speed scout (flight Mach number is 3, altitude 26212 meters), titanium accounted for 93% of the plane structure weight, so-called "Full titanium" aircraft.


When aero-engine thrust-weight ratio increased from 4~6 to 8~10, compressor outlet temperature accordingly increased from 200~300°C to 500~600°C, originally made of aluminium low-pressure compressor disk and blade must use titanium alloy material, or use titanium alloy instead the stainless steel high pressure compressor disk and blade, in order to reduce the structure weight.

In the 70s, The amount of titanium in the aviation engines usually accounts 20%~30% for the total weight of the structure, mainly used in the manufacture of compressor parts, such as forging titanium fan, compressor disk and blade, titanium compressor casing, intermediate casing, bearing housing, etc. Spacecraft, which make use of the specific strength of titanium alloy, corrosion resistance and low temperature resistance to manufacture all kinds of pressure vessel, fuel tank, fasteners, instrument strap, architecture and rocket shell. Artificial earth satellite, the lunar module, manned spacecraft and space shuttle uses titanium alloy plate weldments.

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