Title:
TWO-PHASE STAINLESS-CLAD STEEL SHEET AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2019/189707
Kind Code:
A1
Abstract:
In order to provide a two-phase stainless-clad steel sheet for which the corrosion resistance of the cladding material as well as the strength and ductility of the base material are excellent, disclosed is a two-phase stainless-clad steel sheet formed by joining a two-phase stainless steel sheet as a cladding material to one or both surfaces of a base material steel sheet, wherein the base material steel sheet has a prescribed component composition in which the Nb/N is 3.0 or greater and the Ceq, represented by formula (1), is 0.35 – 0.45, and the two-phase stainless steel sheet has a prescribed component composition in which the PI as defined in formula (2) is 34.0 – 43.0, and has a structure containing a ferrite phase in an area ratio of 35–65%, the amount of precipitated Cr in the structure being 2.00% or less and the amount of precipitated Mo in the structure being 0.50% or less.
Formula (1): Ceq = C + Mn/6 + (Cu+Ni)/15 + (Cr+Mo+V)/5
Formula (2): PI = Cr + 3.3Mo + 16N
Inventors:
KURONUMA YOTA (JP)
OHTSUBO HIROFUMI (JP)
YOKOTA TOMOYUKI (JP)
OHTSUBO HIROFUMI (JP)
YOKOTA TOMOYUKI (JP)
Application Number:
PCT/JP2019/013897
Publication Date:
October 03, 2019
Filing Date:
March 28, 2019
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C22C38/00; B21B1/22; B21B3/02; B23K20/04; C22C38/12; C22C38/58
Domestic Patent References:
| WO2013132863A1 | 2013-09-12 |
Foreign References:
| JP2010180459A | 2010-08-19 | |||
| JP2014114466A | 2014-06-26 | |||
| JP2000061655A | 2000-02-29 |
Other References:
See also references of EP 3778958A4
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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