Aviation has always been the key to large domestic aircraft, and now China has made a major breakthrough in this field. The Titanium-Aluminum alloy engine blade developed by the Institute of Metal Research of the Chinese Academy of Sciences has passed the examination and achieved ideal results. Next, it will be assembled on the Yangtze 1000 engine specially developed for the C919 domestic large aircraft. The C919 has already secured nearly 1,000 international orders and will enter the international market for mass production.
The compressed air engine suction chamber, compressed fuel mix light generated by the hot air temperature is high, the pressure is big, the hot air in the future, drive the combustion chamber at the back of the turbine blade rotation, in front of the turbine blades to drive the compressor blade rotation, the turbine blade is more than 2000 degrees high temperature and high pressure, in order to guarantee the stability of the aircraft engine lasting therefore must be resistant to high temperature and high pressure compressor blade material. Turbine blades can only be made of new titanium alloys.
Aircraft engine blade is the highest part of the engine core technology, but also the most difficult place to manufacture, especially the blade temperature bearing capacity is an important symbol of the advanced degree of a type of engine. Therefore, in a sense, the manufacturing level of aircraft engine blade is a symbol of national aviation industry and even industrial strength. Aircraft engine is working, blade of the combustion chamber temperature over 2000 ℃, the highest pressure is equal to the dozens of normal atmospheric pressure, and the leaf high-speed rotating at a speed of thousands of revolutions per minute, need to carry a strong centrifugal load, so a very bad condition of environment determines the aircraft engine blade this "role" is not ordinary steel or metal to be able to do.
The early aircraft engine blades used deformation superalloy and casting superalloy, but with the increase of the thrust-weight ratio of aircraft engine, these two materials can no longer meet the requirements. In the 1970s, foreign countries began to develop new superalloys. New materials with excellent high temperature properties such as directional solidification superalloy and single crystal superalloy have been introduced successively. In the 1980s, various countries began to develop ceramic blade materials, and began to use anti-corrosion, heat insulation coating technology on the blade to improve the temperature bearing performance of the blade.
