Title:
MARTENSITE-BASED STAINLESS STEEL MATERIAL AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2022/153790
Kind Code:
A1
Abstract:
This martensite-based stainless steel material has a compositional makeup which includes, in mass basis, 0.30-0.60% of C, 0.05-1.00% of Si, 0.05-1.50% of Mn, 0.040% or less of P, 0.030% or less of S, 13.0-18.0% of Cr, 0.01-0.30% of Ni, 0.01-1.00% of Mo, 0.030% or less of Al, 0.010-0.350% of N, 0.0001-0.0030% of Ca, and 0.001-0.010% of O, and in which 2.5C+N equals 1.10% or more and the remaining portion is Fe and impurities. In this martensite-based stainless steel material, the average particle diameter of carbides is 0.50 μm or less. Further, carbides having a size equal to or more than 10 μm are included in an amount of 0.20 particles/cm2 or less.
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Inventors:
NISHIMURA KOU (JP)
ISHIMARU EIICHIRO (JP)
TSUBOI KOICHI (JP)
ISHIMARU EIICHIRO (JP)
TSUBOI KOICHI (JP)
Application Number:
PCT/JP2021/046879
Publication Date:
July 21, 2022
Filing Date:
December 17, 2021
Export Citation:
Assignee:
NIPPON STEEL STAINLESS STEEL CORP (JP)
International Classes:
C21D9/18; C21D9/46; C22C38/00; C22C38/44; C22C38/54
Domestic Patent References:
| WO2021124511A1 | 2021-06-24 |
Foreign References:
| JP2020094275A | 2020-06-18 | |||
| JP2019014916A | 2019-01-31 | |||
| US20020162614A1 | 2002-11-07 | |||
| JP2000273587A | 2000-10-03 | |||
| JP2018009231A | 2018-01-18 | |||
| JP2003313612A | 2003-11-06 |
Attorney, Agent or Firm:
AXIS PATENT INTERNATIONAL (JP)
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