Title:
FERRITIC STAINLESS STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2021/100687
Kind Code:
A1
Abstract:
A ferritic stainless steel sheet which comprises a base material and a nitrided layer that is formed in the surface of the base material, wherein: the chemical composition of the base material contains, in mass%, from 0.001% to 0.020% of C, from 0.01% to 1.50% of Si, from 0.01% to 1.50% of Mn, from 0.010% to 0.050% of P, from 0.0001% to 0.010% of S, from 16.0% to 25.0% of Cr, from 0.001% to 0.030% of N, from 0.01% to 0.30% of Ti and optional elements, with the balance being made up of Fe and unavoidable impurities; the metal structure of the base material contains 95% by volume or more of a ferrite phase; the nitrided layer ranges from the surface to a depth of 0.05 μm of the rolled surface in the sheet thickness direction; and the average nitrogen concentration in the nitrided layer is 0.80% by mass or more.
Inventors:
NISHIMURA KOU (JP)
INOUE YOSHIHARU (JP)
INOUE YOSHIHARU (JP)
Application Number:
PCT/JP2020/042749
Publication Date:
May 27, 2021
Filing Date:
November 17, 2020
Export Citation:
Assignee:
NIPPON STEEL STAINLESS STEEL CORP (JP)
International Classes:
C21D9/46; C22C38/00; C22C38/60; C23C8/26
Domestic Patent References:
| WO2018180643A1 | 2018-10-04 |
Foreign References:
| JPH10142154A | 1998-05-29 | |||
| JP2017137547A | 2017-08-10 | |||
| JP2014181397A | 2014-09-29 | |||
| JP2006316338A | 2006-11-24 | |||
| JP2012172157A | 2012-09-10 | |||
| JP2013087351A | 2013-05-13 | |||
| JP2005320559A | 2005-11-17 |
Other References:
See also references of EP 4063526A4
Attorney, Agent or Firm:
BRIGHTAS IP ATTORNEYS (JP)
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