护环用高氮奥氏体不锈钢的第二相析出

doi:10.13251/j.issn.0254-6051.2024.08.031

金属热处理 ›› 2024, Vol. 49 ›› Issue (8): 178-182.DOI: 10.13251/j.issn.0254-6051.2024.08.031

护环用高氮奥氏体不锈钢的第二相析出

张荣华¹, 宋文志¹, 赵富强², 张世哲², 刘倩¹

1.华北理工大学冶金与能源学院现代冶金技术教育部重点实验室, 河北唐山 063210;
2.中冶沈勘秦皇岛工程设计研究总院有限公司, 河北秦皇岛 066000

收稿日期:2024-02-16 修回日期:2024-05-31 出版日期:2024-08-25 发布日期:2024-09-27
作者简介:张荣华(1980—),女,副教授,博士,主要研究方向为钢的超细化与微合金化,高氮钢、高性能铝合金材料,E-mail:zrh1980@126.com
基金资助:
河北省自然科学基金(E2022209114)

Second phase precipitation of high nitrogen austenitic stainless steel for retaining ring

Zhang Ronghua¹, Song Wenzhi¹, Zhao Fuqiang², Zhang Shizhe², Liu Qian¹

1. Key Laboratory of the Ministry of Education for Modern Metallurgy Technology, College of Metallurgy and Energy, North China University of Science and Technology, Tangshan Hebei 063210, China;
2. MCC Qinhuangdao Engineering Design and Research Institute Co., Ltd., Qinhuangdao Hebei 066000, China

Received:2024-02-16 Revised:2024-05-31 Online:2024-08-25 Published:2024-09-27

摘要/Abstract

摘要： 利用XRD、OM、SEM和TEM试验研究高氮奥氏体不锈钢的第二相析出过程,分析析出相形貌,确定析出相的种类。结果表明,固溶态试样的显微组织由单相奥氏体晶粒和部分孪晶组成。在800~1040 ℃时效2 h,钢中均有Cr₂N相析出,Cr₂N相数量呈先增加后减少的趋势,并且在860 ℃时Cr₂N数量达到峰值。试验钢的析出相主要为碳、氮化物和金属间化合物σ相。800 ℃时效有金属间化合物σ相析出,860 ℃时效有碳化物M₂₃C₆析出,920 ℃时效仅析出Cr₂N,1040 ℃时效有MX相析出。

关键词: 高氮奥氏体不锈钢, 析出相, 时效, 显微组织

Abstract: Second phase precipitation process of high nitrogen austenitic stainless steel was studied by XRD, OM, SEM and TEM. The morphology and the type of precipitated phases were analyzed and determined. The experimental results show that the microstructure of the solution treated specimen is composed of single-phase austenite grains and partial twins. After aging at 800-1040 ℃ for 2 h, Cr₂N precipitates in the steel, and the number of Cr₂N increases first and then decreases, which reaches the peak at 860 ℃. The precipitated phases of the tested steel are mainly carbide, nitride and intermetallic compound σ phase. Aged at 800 ℃, the intermetallic compound σ phase is precipitated, and M₂₃C₆ carbide is precipitated at 860 ℃. Only Cr₂N is precipitated after aging at 920 ℃, and MX phase is precipitated at 1040 ℃.

Key words: high nitrogen austenitic stainless steel, precipitated phase, aging, microstructure

中图分类号:

TG142.71

张荣华, 宋文志, 赵富强, 张世哲, 刘倩. 护环用高氮奥氏体不锈钢的第二相析出[J]. 金属热处理, 2024, 49(8): 178-182.

Zhang Ronghua, Song Wenzhi, Zhao Fuqiang, Zhang Shizhe, Liu Qian. Second phase precipitation of high nitrogen austenitic stainless steel for retaining ring[J]. Heat Treatment of Metals, 2024, 49(8): 178-182.

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护环用高氮奥氏体不锈钢的第二相析出

Second phase precipitation of high nitrogen austenitic stainless steel for retaining ring

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