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Gas turbine is the modern manufacturing "power source", one of the turbine high temperature blade is one of the core of the gas turbine components. A few days ago, Shanghai science and technology commission major special subject "high temperature alloy blade manufacturing technology research" through the experts acceptance.
Gas turbine is a large passenger plane, special ship and civil power and other areas of one of the main source of power, and high temperature turbine blade and its manufacturing technology is the core of gas turbine, but also to restrict China's gas turbine main bottleneck. Foreign matter strictly confidential, which make China's large aircraft, ground gas turbine and the important engineering are disciplined by others. Established in 2008, Shanghai science and technology commission major research special topic, in view of the current on the most advanced international F class 256 mw heavy duty gas turbine turbine high temperature blade in technology research and research, by the Shanghai university is given priority to bear.
Turbine blade manufacturing principle, it is nickel fund of solution casting in the mold, again carries on the cooling crystallization, the process is similar to water vapor in the winter window encounter cold crystallization "ice". Turbine blade can withstand high temperature, do you have enough strength, and in the process of crystallization temperature and crystal formation of quantity, and even in all directions relation. Generally speaking, grain number is less, the blade of high temperature resistant property better and more capable of generator gas turbine contour power equipment use. At present the most difficult in the industry technology, is to let the whole blade become a grain, namely "single" technology. In addition, if let grain orderly arranged in one direction, also can improve the blade intensity, avoid fracture, this kind of technology for "orientation" technology. Through the four years of hard work, task group in the above two kinds of technical path are breakthrough, formed its own unique process route.
The project's success, not only help to our country in gas turbine key components aspects breakthrough foreign blockade, for the domestic power plant is also big good news. With heavy duty gas turbine primary turbine as an example, a total of 96 piece of high temperature alloy blade, if the foreign manufacturers of products, a piece of blade manufacturing cost is controlled in 400000 yuan, the market price amounts to 1 million yuan; But if the domestic blade, the manufacturing cost is only a quarter of the price abroad.