含铜超级奥氏体不锈钢的析出行为

doi:10.13251/j.issn.0254-6051.2021.01.035

金属热处理 ›› 2021, Vol. 46 ›› Issue (1): 193-199.DOI: 10.13251/j.issn.0254-6051.2021.01.035

含铜超级奥氏体不锈钢的析出行为

李兵兵^1,2, 陈海涛¹, 郎宇平¹, 屈华鹏¹, 田志凌², 陈清明³

1.钢铁研究总院特殊钢研究所,北京 100081;
2.钢铁研究总院焊接所,北京 100081;
3.昆明理工大学材料科学与工程学院,云南昆明 650093

收稿日期:2020-06-20 出版日期:2021-01-25 发布日期:2021-01-26
通讯作者: 陈海涛,高级工程师,E-mail:chenhaitao@nercast.com
作者简介:李兵兵(1992—),女,博士研究生,主要研究方向为不锈钢及耐蚀合金,E-mail:361226819@qq.com。
基金资助:
国家重点研发计划(2016YFB0300202)

Precipitation behavior of super austenitic stainless steel containing copper

Li Bingbing^1,2, Chen Haitao¹, Lang Yuping¹, Qu Huanpeng¹, Tian Zhiling², Chen Qingming³

1. Institute for Special Steels,Central Iron and Steel Research Institute,Beijing 100081,China;
2. Welding Institute,Central Iron and Steel Research Institute,Beijing 100081,China;
3. Materials Science and Engineering,Kunming University of Science and Technology,Kunming Yunnan 650093,China

Received:2020-06-20 Online:2021-01-25 Published:2021-01-26

摘要/Abstract

摘要： 含Cu超级奥氏体不锈钢经1200 ℃保温2 h固溶后,在600、700、800、900、1000和1100 ℃分别进行2 h时效处理,然后采用Thermo-Calc热力学计算、SEM、EDS及TEM等方法对析出相进行研究。结果表明,所有试验钢在低温600~800 ℃时效时析出相主要为沿晶σ相,在中温900 ℃时效时析出相主要是沿晶的块状σ相和晶内圆棒状的Laves相与长针状、梭状的χ相,在高温1000 ℃时主要是沿晶块状σ相,时效温度升高到1100 ℃时无析出相;随着温度的升高,析出相尺寸增大,析出相总量先增加后减少,在900 ℃时达到峰值;Cu的增加促进了Laves相与χ相的析出。

关键词: 超级奥氏体不锈钢, Cu, 析出相

Abstract: Cu-containing super austenitic stainless steel was solution treated at 1200 ℃ for 2 h and aged at 600,700,800,900,1000 and 1100 ℃ for 2 h respectively,then the precipitated phases were studied by using Thermo-Calc,SEM,EDS and TEM.The results show that the precipitated phases at 600-800 ℃ are mainly intergranular σ phase,that at 1000 ℃ are intergranular bulk σ phase,rod-shaped Laves phase,and the long needle-like and fusiform χ phase,while that at 1100 ℃ no precipitation.As the temperature rises,the size of the precipitates increases,the total amount of precipitates first increases then decreases and reaches its peak value at 900 ℃,and the precipitation of Laves and χ phases is promoted with the increase of Cu content.

Key words: superaustenitic stainless steel, Cu, precipitated phase

中图分类号:

TG161

李兵兵, 陈海涛, 郎宇平, 屈华鹏, 田志凌, 陈清明. 含铜超级奥氏体不锈钢的析出行为[J]. 金属热处理, 2021, 46(1): 193-199.

Li Bingbing, Chen Haitao, Lang Yuping, Qu Huanpeng, Tian Zhiling, Chen Qingming. Precipitation behavior of super austenitic stainless steel containing copper[J]. Heat Treatment of Metals, 2021, 46(1): 193-199.

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含铜超级奥氏体不锈钢的析出行为

Precipitation behavior of super austenitic stainless steel containing copper

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