金属热处理 ›› 2020, Vol. 45 ›› Issue (8): 38-42.DOI: 10.13251/j.issn.0254-6051.2020.08.008

• 组织与性能 • 上一篇    下一篇

38CrMoAl钢的奥氏体晶粒长大行为

刘豪, 张立文, 李飞, 张驰, 毛培刚, 李超群   

  1. 大连理工大学 材料科学与工程学院, 辽宁 大连 116024
  • 收稿日期:2020-01-26 出版日期:2020-08-25 发布日期:2020-09-07
  • 通讯作者: 张立文,教授,博士,E-mail:commat@mail.dlut.edu.cn
  • 作者简介:刘 豪(1994—),男,硕士研究生,主要研究方向为金属材料热变形行为,E-mail:2662065253lh@mail.dlut.edu.cn
  • 基金资助:
    国家自然科学基金(51604058)

Austenite grain growth behavior of 38CrMoAl steel

Liu Hao, Zhang Liwen, Li Fei, Zhang Chi, Mao Peigang, Li Chaoqun   

  1. School of Materials Science and Engineering, Dalian University of Technology, Dalian Liaoning 116024, China
  • Received:2020-01-26 Online:2020-08-25 Published:2020-09-07

摘要: 将38CrMoAl钢加热至1000~1200 ℃ 的奥氏体化温度,保温时间为0~300 s,研究了奥氏体化温度和保温时间对奥氏体晶粒长大行为的影响。试验结果表明,试验钢奥氏体平均晶粒尺寸随奥氏体化温度升高而增大,且晶粒长大速率随着温度的升高而增大。在同一奥氏体化温度下,奥氏体平均晶粒尺寸随保温时间的增加逐渐增大,且晶粒长大速率随时间的延长逐渐减小。根据试验钢奥氏体晶粒尺寸试验数据,建立了38CrMoAl钢奥氏体晶粒尺寸与奥氏体化温度和保温时间关系的Sellars模型,并验证了模型的准确性。

关键词: 38CrMoAl钢, 奥氏体, 晶粒长大, 奥氏体化温度, 保温时间

Abstract: 38CrMoAl steel was austenitized by heating to 1000-1200 ℃ for 0-300 s by different process configurations. The effect of austenitizing temperature and holding time on the austenite grain growth behavior was studied. The results show that the average grain size of austenite in the tested steel increases with the increase of austenitizing temperature, and the grain growth rate increases with the increase of temperature. At the same austenitizing temperature, the average grain size of austenite increases with the increase of holding time, and the grain growth rate decreases with the increase of holding time. According to the test data of austenite grain size of the tested steel, the Sellars model of the austenite grain size and austenitizing temperature and holding time of the 38CrMoAl steel was established, and the accuracy of the model was verified.

Key words: 38CrMoAl steel, austenite, grain growth, austenitizing temperature, holding time

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