金属热处理 ›› 2020, Vol. 45 ›› Issue (2): 23-28.DOI: 10.13251/j.issn.0254-6051.2020.02.005

• 组织与性能 • 上一篇    下一篇

GH4169合金的冷变形行为

温博1,2, 吕旭东1,2, 杜金辉1   

  1. 1. 钢铁研究总院 高温材料研究所, 北京 100081;
    2. 北京市高温合金新材料重点实验室, 北京 100081
  • 收稿日期:2019-08-10 出版日期:2020-02-25 发布日期:2020-04-03
  • 通讯作者: 吕旭东,教授级高工,博士,主要从事高温合金相关研究,E-mail:lxdong0700@163.com
  • 作者简介:温 博(1994—),男,硕士研究生,主要从事高温合金相关研究,已发表论文1篇,联系电话:18801033903,E-mail:694607114@qq.com。

Cold deformation behavior of GH4169 alloy

Wen Bo1,2, Lü Xudong1,2, Du Jinhui1   

  1. 1. Institute of High Temperature Materials Research, Central Iron and Steel Research Institute, Beijing 100081, China;
    2. Beijing Key Laboratory of Advanced High Temperature Materials, Beijing 100081, China
  • Received:2019-08-10 Online:2020-02-25 Published:2020-04-03

摘要:

通过室温压缩试验、数学模型拟合、光学显微镜(OM)、电子背散射衍射(EBSD)和显微硬度等手段,建立GH4169合金冷变形本构方程,研究了冷变形量及应变速率对GH4169合金组织和性能的影响。结果表明,GH4169合金冷变形加工硬化规律基本符合Hollomon方程,其中应变速率对加工硬化影响较小,变形量是影响加工硬化的主要因素;随着变形量的增大,晶粒的变形程度增大,晶粒内部的小角度晶界随着变形量的增大逐渐增多,并有部分向大角度晶界转化;合金的显微硬度也随着变形量的增大而逐渐增大。

关键词: GH4169合金, 冷变形, 组织, 性能

Abstract:

The constitutive equation of GH4169 alloy during cold deformation was established by means of room temperature compression test, mathematical model fitting, optical microscope (OM), electron backscatter diffraction (EBSD) and microhardness test. The effect of cold deformation rate and deformation amount on the microstructure and properties of GH4169 alloy were studied. The results show that the work hardening law of GH4169 alloy basically conforms to Hollomon equation during cold deformation, in which the deformation rate has little effect on work hardening, and the deformation amount is the main factor affecting work hardening; with the increase of deformation, the deformation degree of grain increases; the low-angle grain boundary within grain increases with the deformation amount, and some low-angle boundaries change to high-angle ones. The microhardness of the alloy increases with the increase of deformation.

Key words: GH4169 alloy, cold deformation, microstructure, properties

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