- 专利标题: FERRITIC STAINLESS STEEL AND PROCESS FOR PRODUCING SAME
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申请号: EP15872143申请日: 2015-11-17
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公开(公告)号: EP3239315A4公开(公告)日: 2018-01-24
- 发明人: FUKUDA KUNIO , ISHIKAWA SHIN , FUJISAWA MITSUYUKI , YAMAUCHI KATSUHISA , KAMI CHIKARA
- 申请人: JFE STEEL CORP
- 专利权人: JFE STEEL CORP
- 当前专利权人: JFE STEEL CORP
- 优先权: JP2014260776 2014-12-24
- 主分类号: C22C38/00
- IPC分类号: C22C38/00 ; C21D1/06 ; C21D1/76 ; C21D9/46 ; C22C38/02 ; C22C38/04 ; C22C38/06 ; C22C38/42 ; C22C38/44 ; C22C38/46 ; C22C38/48 ; C22C38/50 ; C22C38/54 ; C23C8/26
摘要:
Provided is a ferritic stainless steel having a chemical composition containing, in mass%: 0.003% to 0.025% of C; 0.05% to 1.00% of Si; 0.05% to 1.00% of Mn; 0.04% or less of P; 0.01% or less of S; 16.0% to 23.0% of Cr; 0.20% to 0.80% of Cu; 0.05% to 0.60% of Ni; 0.20% to 0.70% of Nb; 0.005% to 0.020% of N; and the balance being Fe and incidental impurities, in which a nitrogen-enriched layer is present that has a nitrogen concentration peak value of 0.03 mass% to 0.30 mass% at a depth of within 0.05 µm of a surface of the steel.
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