金属热处理 ›› 2023, Vol. 48 ›› Issue (7): 38-43.DOI: 10.13251/j.issn.0254-6051.2023.07.007

• 材料研究 • 上一篇    下一篇

马氏体不锈钢回火过程中碳化物的演变规律及其对耐蚀性的影响

陈俊1, 张覃轶1,2,3, 邓锦强1, 袁胜福2, 周鸿锋3, 伍冬1,2   

  1. 1.武汉理工大学 材料科学与工程学院, 湖北 武汉 430070;
    2.阳江合金材料实验室, 广东 阳江 529500;
    3.阳江拓必拓工业技术研究院有限公司, 广东 阳江 529500
  • 收稿日期:2022-12-29 修回日期:2023-05-16 出版日期:2023-07-25 发布日期:2023-09-04
  • 通讯作者: 张覃轶,副教授,博士,E-mail:zhqy@whut.edu.cn
  • 作者简介:陈 俊(1997—),男,硕士研究生,主要研究方向为金属材料热处理, E-mail:303673@whu.edu.cnt。

Carbide evolution and its effect on corrosion resistance of martensitic stainless steel during tempering

Chen Jun1, Zhang Qinyi1,2,3, Deng Jinqiang1, Yuan Shengfu2, Zhou Hongfeng3, Wu Dong1,2   

  1. 1. School of Materials Science and Engineering, Wuhan University of Technology, Wuhan Hubei 430070, China;
    2. Yangjiang Advanced Alloys Laboratory, Yangjiang Guangdong 529500, China;
    3. Yangjiang Tuobituo Industrial Technology Research Institute Co., Ltd., Yangjiang Guangdong 529500, China
  • Received:2022-12-29 Revised:2023-05-16 Online:2023-07-25 Published:2023-09-04

摘要: 通过显微组织观察、能谱分析和硬度测试研究了1.4116马氏体不锈钢回火过程中碳化物的演变规律,采用盐雾腐蚀试验和电化学测试研究了不同温度回火后的耐蚀性。结果表明,回火温度超过500 ℃时,大量富Cr碳化物的析出是耐蚀性下降的根本原因。在580 ℃回火时,自腐蚀电位最低,耐蚀性最差,但回火温度超过600 ℃时,自腐蚀电位升高,耐蚀性得到明显改善。在实际生产中,不建议1.4116马氏体不锈钢在500~600 ℃进行回火。

关键词: 马氏体不锈钢, 回火, 碳化物, 耐蚀性

Abstract: Carbide evolution of 1.4116 martensitic stainless steel during tempering was studied by means of microstructure observation, energy spectrum analysis and hardness test, and the corrosion resistance after tempering at different temperatures was studied through salt spray corrosion test and electrochemical test. The results show that when the tempering temperature exceeds 500 ℃, a large number of Cr-rich carbides are precipitated, which is the main reason for the decrease of corrosion resistance. When tempering at 580 ℃, the self-corrosion potential is the lowest and the corrosion resistance is the worst, however, when the tempering temperature exceeds 600 ℃, the self-corrosion potential increases and the corrosion resistance is significantly improved. In actual production, the 1.4116 martensitic stainless steel should not be tempered at 500-600 ℃.

Key words: martensitic stainless steel, tempering, carbide, corrosion resistance

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