Aircraft engine known as the heart of the aircraft, the aircraft's energy conversion. The temperature bearing capability of the blade is the key factor to determine the performance of the engine. In order to shorten the gap between the developed countries in Europe and America China, China has aircraft engine and gas turbine as a major science and technology projects, and in March 2016 formally established the "Chinese Aero Engine Group Co. ltd.".
In June 21, 2016, Nanjing University of Science and Technology held a news conference, the school developed a new titanium Aluminum Alloy professor Chen Guang team the operating temperature can reach 900 DEG C, 150 increase more than -250 DEG C high temperature resistant ability of the existing core engine parts materials. In June 20, 2016, the world's top journals, natural materials, published its relevant results online.
Conference of experts, the core components of China aero engine blades made of material is nickel base alloy, the high temperature resistance at 650 DEG -750 DEG, once the temperature is higher, the material will "creep" is slowly deformation. Compared with nickel base alloy, titanium aluminum alloy not only has its own advantages such as small quality, but also has the characteristics of high strength and high plasticity.
It is understood that the Nanjing University of Science and Technology Department of materials evaluation and Engineering Design Education Research Center Professor Chen Guang team in the national 973 Plan funding, design a new member of the "Ti Aluminum Alloy family polysynthetic twin titanium aluminum single crystal" (PST titanium aluminum single crystal), not only the strength and plasticity is greatly enhanced, the high temperature resistant ability is more than 900 DEG C.
Experts, the United States GE company has developed a code "4822", high temperature resistance at 650 DEG -750 DEG Ti Aluminum Alloy, replace the nickel based superalloy, only made the last two stage low pressure turbine blade of an engine, the single engine weight loss of about 200 pounds of fuel, 20%, nitride 80% reduction in emissions, noise significantly reduced for the Boeing 787 aircraft, 2007 successful test flight, 2009 formally put into commercial operation, in the field of aviation and material was sensational. This material once applied to the leaves of the whole engine, for aircraft engine weight loss, noise reduction, fuel saving effect will be more significant.
Nanjing science and technology next will be completed as soon as possible the comprehensive performance test of the alloy, the real application of Chinese aviation engine blade manufacturing.