Microstructure Characteristics and Microstructure Evolution during Hot and Cold Working Process of GH5188 Superalloy

被引：0

作者：

Gao Yawei ^{[1
]}

Dong Jianxin ^{[1
]}

Yao Zhihao ^{[1
]}

Zhang Maicang ^{[1
]}

Niu Yongji ^{[2
]}

机构：

[1] Univ Sci & Technol Beijing, Beijing 100083, Peoples R China

[2] Beijing Beiye Funct Mat Corp, Beijing 100192, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2017年 / 46卷 / 10期

关键词：

GH5188; microstructure characteristics; microstructure evolution; heat treatment process; FATIGUE;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In order to provide theoretical guidance for production process control and products performance optimization, the microstructure evolution and heat treatment in the production process of GH5188 cobalt-base superalloy were investigated by SEM, EDS and Thermo-Calc software. The result indicates that the main phases of GH5188 alloy include gamma, M6C and M23C6. The 1200 degrees C/20 h homogenization could reduce segregation of as-cast microstructure. Hot-rolled microstructure has a fine grain size, and a large number of aligned carbides precipitating along the rolling direction. In the cold-rolled microstructure with serious grain deformation, granular M6C is found to be the predominant phase. When the annealing temperature is higher than 1170 degrees C, secondary carbides at the grain boundaries dissolve back into gamma and recrystallized grain can grow in normal way.

引用

页码：2922 / 2928

页数：7