Invention Grant
- Patent Title: Ferritic stainless steel and method for manufacturing the same
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Application No.: US14437015Application Date: 2013-10-22
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Publication No.: US09863023B2Publication Date: 2018-01-09
- Inventor: Tomohiro Ishii , Shin Ishikawa , Hiroyuki Ogata , Hiroki Ota
- Applicant: JFE STEEL CORPORATION
- Applicant Address: JP Tokyo
- Assignee: JFE Steel Corporation
- Current Assignee: JFE Steel Corporation
- Current Assignee Address: JP Tokyo
- Agency: RatnerPrestia
- Priority: JP2012-232506 20121022; JP2013-038202 20130228; JP2013-046247 20130308
- International Application: PCT/JP2013/006231 WO 20131022
- International Announcement: WO2014/064920 WO 20140501
- Main IPC: C22C38/22
- IPC: C22C38/22 ; C22C38/24 ; C22C38/26 ; C22C38/28 ; C21D7/02 ; C25F1/06 ; C22C38/58 ; C21D9/46 ; C22C38/00 ; C22C38/02 ; C22C38/04 ; C22C38/06 ; C22C38/44 ; C22C38/46 ; C22C38/48 ; C22C38/50 ; C25F1/00 ; B21B1/22 ; C21D1/26 ; C21D6/00 ; C21D8/00 ; C22C38/42 ; C22C38/54

Abstract:
Provided are a ferritic stainless steel having a corrosion resistance at a certain level or more and a temper-color removal performance at a certain level or more and a method for manufacturing the ferritic stainless steel. A ferritic stainless steel has a composition containing, by mass %, C: 0.001% to 0.030%, Si: 0.03% to 0.30%, P: 0.05% or less, S: 0.01% or less, Cr: more than 22.0% to 28.0%, Mo: 0.2% to 3.0%, Al: 0.01% to 0.15%, Ti: more than 0.30% to 0.80%, V: 0.001% to 0.080%, and N: 0.001% to 0.050%; Mn: 0.05% to 0.30% and Ni: 0.01% to 5.00%, or Mn: 0.05% to 2.00% and Ni: 0.01% to 0.30%; Nb: 0.05% or less as an optional component; and the balance being Fe and inevitable impurities, and the steel has a surface where TiN having a grain diameter of 1 μm or more is distributed at a density of 30 particles/mm2 or more.
Public/Granted literature
- US20150275342A1 FERRITIC STAINLESS STEEL AND METHOD FOR MANUFACTURING THE SAME Public/Granted day:2015-10-01
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