高亚伟,董建新,姚志浩,张麦仓,牛永吉.GH5188高温合金组织特征及冷热加工过程组织演变[J].稀有金属材料与工程,2017,46(10):2922~2928.[Gao Yawei,Dong Jianxin,Yao Zhihao,Zhang Maicang,Niu Yongji.Microstructure evolution during hot and cold working process and microstructure characteristics of GH5188 superalloy[J].Rare Metal Materials and Engineering,2017,46(10):2922~2928.]
GH5188高温合金组织特征及冷热加工过程组织演变
投稿时间:2015-06-21  修订日期:2015-07-27
中文关键词:  GH5188  组织特征  组织演变  热处理工艺
基金项目:国家高技术研究发展计划(863计划)
中文摘要:
      为了给控制生产工艺、优化性能提供理论参考,利用SEM、EDS和Thermo-Calc热力学软件研究了GH5188钴基高温合金生产加工过程中的组织演变及热处理工艺。结果表明:GH5188合金主要相组成为γ相、M6C和 M23C6,采用1200°C/20h的均匀化制度可明显消除铸态组织偏析;热轧态组织晶粒细小且有大量碳化物沿着轧向平行析出;冷轧态组织晶粒扭曲变形严重,颗粒状M6C为主要析出相,当退火温度高于1170℃,晶界处的二次碳化物基本回溶,再结晶晶粒能够正常长大。
Microstructure evolution during hot and cold working process and microstructure characteristics of GH5188 superalloy
英文关键词:GH5188  microstructure characteristics  microstructure evolution  heat treatment process
英文摘要:
      In order to provide theoretical guidance for production process contorl and performance optimization, the microstructure evolution and heat treatment process in the production procecss 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 γ, M6C and M23C6. The 1200°C/20h could reduce segregation of as-cast microstructure. Hot-rolled microstructure have a fine grain size, and a large number of aligned carbides precipitate along rolling direction. In the cold-rolled microstructure with serious grain deformation, granular M6C was found to be predominant phase. when the annealing temperature is higher than 1170°C, secondary carbides at the grain boundaries dissolved back into γ and recrystallized grain can grow in normal way.
作者单位E-mail
高亚伟 北京科技大学材料与科学学院 gaoyw1991@163.com 
董建新 北京科技大学材料与科学学院  
姚志浩 北京科技大学材料与科学学院  
张麦仓 北京科技大学材料与科学学院  
牛永吉 北京北冶功能材料有限公司  
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