金属热处理 ›› 2023, Vol. 48 ›› Issue (1): 95-99.DOI: 10.13251/j.issn.0254-6051.2023.01.016

• 材料研究 • 上一篇    下一篇

Cr13Ni4Mo钢逆转变奥氏体的形成及其对性能的影响

赵帅1, 李青春1, 安昊瀛2, 陈淑英1, 常国威1   

  1. 1.辽宁工业大学 材料科学与工程学院, 辽宁 锦州 121001;
    2.西安理工大学 材料科学与工程学院, 陕西 西安 710048
  • 收稿日期:2022-08-17 修回日期:2022-11-09 出版日期:2023-01-25 发布日期:2023-02-03
  • 通讯作者: 李青春,教授,博士,E-mail:lqcsusan@126.com
  • 作者简介:赵 帅(1994—),男,博士研究生,主要研究方向为金属组织与性能,E-mail:229301524@qq.com。

Formation of reversed austenite and its effect on properties of Cr13Ni4Mo steel

Zhao Shuai1, Li Qingchun1, An Haoying2, Chen Shuying1, Chang Guowei1   

  1. 1. School of Materials Science and Engineering, Liaoning University of Technology, Jinzhou Liaoning 121001, China;
    2. School of Materials Science and Engineering, Xi'an University of Technology, Xi'an Shaanxi 710048, China
  • Received:2022-08-17 Revised:2022-11-09 Online:2023-01-25 Published:2023-02-03

摘要: 采用XRD、扫描电镜、EBSD、拉伸性能测试等手段研究了Cr13Ni4Mo钢逆转变奥氏体的形成规律、形成机制与力学性能。结果表明,Cr13Ni4Mo钢经550~730 ℃一次回火后并没有逆转变奥氏体产生;经630 ℃一次回火+530~630 ℃二次回火时,随二次回火温度的升高,逆转变奥氏体含量呈先增加后减少的趋势,其抗拉强度、伸长率和强塑积也相应地先增加后减少。当二次回火温度为590 ℃时,逆转变奥氏体的含量达到峰值,综合力学性能最佳。二次回火温度为550 ℃时,逆转变奥氏体主要以切变机制在马氏体板条内部形成,随着二次回火温度升高,逆转变奥氏体逐渐以扩散机制形成为主。

关键词: 逆转变奥氏体, 二次回火, Cr13Ni4Mo钢

Abstract: Formation law, mechanism of reversed austenite and mechanical properties of Cr13Ni4Mo steel were studied by means of XRD, SEM, EBSD and tensile test. The results show that no reversed austeniteis formed in the Cr13Ni4Mo steel after first tempering at 550-730 ℃. When first tempering at 630 ℃ and second tempering at 530-630 ℃, the content of reversed austenite in the steel increases firstly and then decreases with the increase of the second tempering temperature, and the tensile strength, elongation and product of strength and elongation also increase first and then decrease correspondingly. When the second tempering temperature approaches 590 ℃, the content of reversed austenite reaches the peak and the comprehensive mechanical properties are the best. The reversed austenite is mainly formed in the martensite lath with shear mechanism when the second tempering temperature is 550 ℃, and with the increase of second tempering temperature, the formation of reversed austenite is gradually dominated by diffusion mechanism.

Key words: reversed austenite, second tempering, Cr13Ni4Mo steel

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