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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 19    Special 3    December 2009

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Aging precipitation and recrystallization in
high-nitrogen austenitic stainless steel
SHI Feng(石 锋)1,2, WANG Li-jun(王立军)3, CUI Wen-fang(崔文芳)3, QI Yang(祁 阳)1,3, LIU Chun-ming(刘春明)2

1. School of Science, Northeastern University, Shenyang 110004, China;
2. School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China;
3. Key Laboratory for Anisotropy and Texture of Materials, Ministry of Education,
Northeastern University, Shenyang 110004, China

Abstract:The interaction between precipitation and recrystallization in cold deformed Fe-18Cr-12Mn-0.48N high-nitrogen austenitic stainless steel was investigated by means of hardness test, optical microscopy (OM) and transmission electron microscopy (TEM). The results show that the recrystallization of the steel begins at about 750℃. When aging at 750℃, the precipitation occurs prior to recrystallization. Large numbers of the second phases nucleate in dislocation, grain boundary and subgrain boundary. Precipitation of the second-phase particles hinders the formation of recrystallization nucleus.

 

Key words: high-nitrogen austenitic stainless steel; aging; precipitation; recrystallization

ISSN 1672-7029
CN 43-1423/U

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