China began to develop GH4169 alloy within the Seventies, primarily utilized in disk elements, and also the use time is comparatively short, therefore the double method of vacuum induction and electrical scum remelting is adopted. within the Eighties, it became the most analysis direction to enhance and improve the standard of materials and improve the excellent performance and reliableness of alloys. the most analysis directions of this GH4169 alloy are:
(1) Improve the smelting method, quantify the smelting parameters, and bring home the bacon stable operation of the program, in order that the microstructure of the alloy is a lot of uniform, thereby getting wonderful yield and fatigue strength, resistance to crack propagation and crack arrest, and improvement of low cycle fatigue strength;
(2) Improve the warmth treatment method. this heat treatment method can't eliminate the segregation within the center of the block, thus it's Associate in Nursing adverse result on the uniformity of the structure. Therefore, employing a cheap blending hardening method to get the fine crystal blank has become one in all the most analysis directions nowadays;
(3) Improve the planning of use. Since the operational temperature of GH4169 can not be above 650 °C, the cooling of parts ought to be reinforced to relinquish full play to the benefits of high performance and low price of the superalloy;
(4) Improve the soundness of the organization. thanks to the long life necessities of aero-engine parts, it's conjointly important to enhance the long aging stability of the GH4169 alloy.