金属热处理 ›› 2020, Vol. 45 ›› Issue (9): 77-80.DOI: 10.13251/j.issn.0254-6051.2020.09.013

• 工艺研究 • 上一篇    下一篇

加热工艺参数对12%Cr钢晶粒长大行为的影响

张学忠, 刘建生, 何文武, 闫霄霞, 杨春鹏   

  1. 太原科技大学 材料科学与工程学院,山西 太原 030024
  • 收稿日期:2020-03-02 出版日期:2020-09-25 发布日期:2020-12-29
  • 通讯作者: 刘建生,教授,博士,博士生导师,E-mail:jiansliu@163.com
  • 作者简介:张学忠(1979—),男,博士研究生,主要研究方向为大型锻件制造理论与技术,E-mail:466945302@qq.com
  • 基金资助:
    国家自然科学基金(51775361);山西省研究生优秀创新项目(2018BY102);太原科技大学博士启动基金(20172011)

Effect of heating parameters on grain growth behavior of 12%Cr steel

Zhang Xuezhong, Liu Jiansheng, He Wenwu, Yan Xiaoxia, Yang Chunpeng   

  1. College of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan Shanxi 030024,China
  • Received:2020-03-02 Online:2020-09-25 Published:2020-12-29

摘要: 研究了不同加热工艺参数下(加热温度1050~1300 ℃,保温时间0.25~24 h)12%Cr超超临界转子钢的奥氏体晶粒长大行为,并通过光学显微镜(OM)观察晶粒尺寸的变化规律,建立晶粒长大数学模型。结果表明:随着加热温度增加,晶粒尺寸逐渐增加,加热温度低于1150 ℃时,晶粒尺寸增加明显,而温度高于1150 ℃后,晶粒尺寸逐渐趋于稳定;随着保温时间的增加,晶粒尺寸逐渐增加,保温时间增加到3 h后,晶粒尺寸增加趋势放缓。采用非线性回归方法和Arrhenius晶粒长大模型,建立了该钢的晶粒长大数学模型。

关键词: 12%Cr转子钢, 奥氏体晶粒, 晶粒长大行为, 晶粒长大模型

Abstract: Austenite grain growth behavior of 12%Cr ultra-supercritical rotor steel with different heating process parameters (heating temperature 1050-1300 ℃,holding time 0.25-24 h) was studied.The change rule of grain size was observed by optical microscope (OM),and the mathematical model of grain growth was established.The results show that with the increase of heating temperature,the grain size increases gradually.When the heating temperature is lower than 1150 ℃,the grain size increases obviously.When the temperature is higher than 1150 ℃,the grain size tends to be stable.With the increase of holding time,the grain size increases gradually,and when the holding time increases to 3 h,the increasing trend of grain size slows down.The mathematical model of grain growth under different heating process parameters is established by using nonlinear regression method and Arrhenius grain growth model.

Key words: 12%Cr rotor steel, austenite grain, grain growth behavior, grain growth model

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