1 Beijing GAONA Materials & Technology Co., Ltd., Beijing 100081, China 2 Beijing Key Laboratory of Advanced High Temperature Materials, Central Iron & Steel Research Institute, Beijing 100081, China 3 AECC South Industry Company Limited, Zhuzhou 410000, Hunan, China 4 AECC Hunan Aviation Powerplant Research Institute, Zhuzhou 412000, Hunan, China
GH4720Li superalloy has been widely employed in high-performance aero engines turbine disks and other rotating component due to the excellent high temperature strength, anti-fatigue, corrosion resistance and long-term structural stability. The mechanism of function and evolution rule of γ'phase in GH4720Li superalloy was summed up in this paper. The relationship between γ'phase and high-temperature properties and the interaction law of γ'phase and residual stress were analyzed. In addition, the research progress of the new superalloy which was designed on the basis of GH4720Li superalloy was summarized, the future application of partitioned cooling technology and dual-organization dual-performance disk preparation technology was prospected.
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2020, Vol. 48 
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