Title:
MARTENSITIC STAINLESS STEEL SHEET HAVING EXCELLENT CORROSION RESISTANCE AND METHOD FOR MANUFACTURING SAME, AND MARTENSITIC STAINLESS BLADED PRODUCT
Document Type and Number:
WIPO Patent Application WO/2022/191085
Kind Code:
A1
Abstract:
The present invention provides a martensitic stainless steel sheet characterized in that: the martensitic stainless steel sheet has a steel composition of, by mass, 0.30 to 0.60% of C, 0.05 to 1.00% of Si, 0.10 to 1.50% of Mn, 11.0 to 15.0% of Cr, 0.01 to 0.60% or less of Ni, 0.01 to 0.50% of Cu, 0.01 to 1.0% of Mo, 0.01 to 0.50% of V, 0.03% or less of Al, 0.01 to 0.05% of N, and 0.01% or less of O; and when a carbide is present as inclusions corresponding to the Group B inclusions defined in JIS G 0555, the carbide cleanliness index of the carbide is 3.0 or below, the carbide area ratio when observed under an optical microscope having a 200-fold magnification is 2% or below, or the amount of coarse carbide recovered by a 10 μm-mesh filter in an extraction residual analysis of the entire thickness is 0.6 mass% or below in terms of the amount of Cr.
Inventors:
TERAOKA SHINICHI (JP)
SAKAIZAWA YUTO (JP)
KAWAUTI DAISUKE (JP)
INOUE YOSHIHARU (JP)
SAKAIZAWA YUTO (JP)
KAWAUTI DAISUKE (JP)
INOUE YOSHIHARU (JP)
Application Number:
PCT/JP2022/009534
Publication Date:
September 15, 2022
Filing Date:
March 04, 2022
Export Citation:
Assignee:
NIPPON STEEL STAINLESS STEEL CORP (JP)
International Classes:
C21D6/00; C21D9/00; C21D9/46; C22C38/00; C22C38/46; C22C38/54
Domestic Patent References:
| WO2015022932A1 | 2015-02-19 |
Foreign References:
| JP2018009231A | 2018-01-18 | |||
| JP2002256397A | 2002-09-11 | |||
| JPH0335890B2 | 1991-05-29 | |||
| JP5645151B1 | 2014-12-24 |
Attorney, Agent or Firm:
KINOSHITA & ASSOCIATES (JP)
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