Journal of Shanghai University(Natural Science Edition) ›› 2018, Vol. 24 ›› Issue (6): 955-960.doi: 10.12066/j.issn.1007-2861.1879

• Research Paper • Previous Articles     Next Articles

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

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

CLC Number: