金属热处理 ›› 2022, Vol. 47 ›› Issue (4): 46-52.DOI: 10.13251/j.issn.0254-6051.2022.04.007

• 组织与性能 • 上一篇    下一篇

固溶处理对GH4080A高温合金微观组织的影响

连轶博1, 杨春雷2, 王国栋2, 宋威1   

  1. 1.国机金属江苏有限公司, 江苏 江阴 214000;
    2.江苏省产业技术研究院 先进金属材料及应用技术研究所, 江苏 常熟 215506
  • 收稿日期:2021-12-30 修回日期:2022-01-28 出版日期:2022-04-25 发布日期:2022-05-19
  • 作者简介:连轶博(1981—),男,工程师,主要研究方向为镍基高温合金,E-mail:13913685671@163.com

Effect of solution treatment on microstructure of GH4080A superalloy

Lian Yibo1, Yang Chunlei2, Wang Guodong2, Song Wei1   

  1. 1. SINOMACH Jiangsu Co., Ltd., Jiangyin Jiangsu 214000, China;
    2. Institute of Novel Metals and Applied Technologies, Jiangsu Industrial Technology Research Institute, Changshu Jiangsu 215506, China
  • Received:2021-12-30 Revised:2022-01-28 Online:2022-04-25 Published:2022-05-19

摘要: 利用电子背散射衍射(EBSD)技术,研究了不同固溶处理工艺对GH4080A高温合金微观组织的影响。结果表明,初始热轧棒材在轧制过程中动态再结晶不充分,残留有未再结晶的晶粒,晶粒内部有较多的小角度晶界。当固溶温度为1020 ℃时,主要以再结晶的形核为主,随着固溶温度的升高,再结晶形核基本结束,开始进入晶粒长大阶段。再结晶过程伴随着小角度取向差向大角度取向差的转变,且再结晶过程中发现了薄片状的{111}孪晶组织以及大量的Σ3晶界。

关键词: GH4080A合金, 再结晶, 孪晶, 取向差, 晶粒尺寸

Abstract: Effect of different solution treatment on microstructure of GH4080A superalloy was studied by using electron backscatter diffraction (EBSD) technology. The results show that the dynamic recrystallization during the rolling process of the initial hot-rolled bar is insufficient, and there are unrecrystallized grains as well as many inside-grain small-angle grain boundaries. When the solution treatment temperature is 1020 ℃, the recrystallization is mainly in the stage of nucleation. With the increase of solution treatment temperature, the recrystallization nucleation is completed basically and the grain growth stage begins. The recrystallization process is accompanied by the transformation from small-angle misorientation to large-angle misorientation, and lamellar {111} twin structure and a large number of Σ3 grain boundaries are found during the recrystallization process.

Key words: GH4080A alloy, recrystallization, twins, misorientation, grain size

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