上海大学学报(自然科学版) ›› 2018, Vol. 24 ›› Issue (6): 955-960.doi: 10.12066/j.issn.1007-2861.1879

• 研究论文 • 上一篇    下一篇

N 含量对 Fe-21Cr-3Ni-1Mo-N 双相不锈钢组织的影响

危志强1,2, 陈湘茹1(), 仲红刚1, 翟启杰1   

  1. 1.上海大学 材料科学与工程学院, 上海 200444
    2.中国瑞林工程技术股份有限公司, 南昌 330031
  • 收稿日期:2017-02-12 出版日期:2018-12-30 发布日期:2018-12-26
  • 通讯作者: 陈湘茹 E-mail:cxr16@shu.edu.cn
  • 基金资助:
    国家自然科学基金资助项目(51404150);国家自然科学基金资助项目(51227803);国家自然科学基金资助项目(51504148)

Effect of N content on microstructure of Fe-21Cr-3Ni-1Mo-N duplex stainless steel

WEI Zhiqiang1,2, CHEN Xiangru1(), ZHONG Honggang1, ZHAI Qijie1   

  1. 1. School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
    2. China Nerin Engineering Co., Ltd., Nanchang 330031, China
  • Received:2017-02-12 Online:2018-12-30 Published:2018-12-26
  • Contact: CHEN Xiangru E-mail:cxr16@shu.edu.cn

摘要:

研究了不同 N 含量对 Fe-21Cr-3Ni-1Mo-N 双相不锈钢凝固组织的影响, 发现N含量对两相比例的影响非常显著. 通过热力学分析发现, N 含量的增加 有利于奥氏体析出、长大和奥氏体比例的增加. 通过对数据拟合分析发现, 当N含量为 1.545${\%}$ 时, Fe-21Cr-3Ni-1Mo-N 双相不锈钢两相比例为 1:1, N元素的奥氏体化作用是 Ni 的 30 倍.

关键词: 双相不锈钢, N, 两相比例

Abstract:

The effects of nitrogen content on the microstructure of Fe-21Cr-3Ni-1Mo-N duplex stainless steel (DSS) are studied. Increase of nitrogen increases the austenite volume fraction, and the effect of N content on the phase ratio is significant. With thermodynamic analysis, it is found that increase of N content is conducive to precipitation and growth of austenite. By fitting the data, it is found that the phase ratio of Fe-21Cr-3Ni-1Mo-N duplex stainless steel is 1:1 when the content of N is 1.545${\%}$.

Key words: duplex stainless steel (DSS), nitrogen, phase ratio

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