Title:
STEEL SHEET AND PRESS-MOLDED ARTICLE
Document Type and Number:
WIPO Patent Application WO/2023/026468
Kind Code:
A1
Abstract:
Adopted are: a steel sheet having a chemical composition that comprises, by mass%, 0.040-0.105% of C, 1.00-2.30% of Mn, 0.005-1.500% of Si, 0.005-0.700% of Al, not more than 0.100% of P, not more than 0.0200% of S, not more than 0.0150% of N, and not more than 0.0100% of O, the remainder being Fe and impurities, and having a value of ΔC calculated from formula (1) below, where C20 is the content of C at a depth of 20μm from a surface and C60 is the content of C at a depth of 60 μm from said surface, that is 0.20-0.90 mass%/mm; and a press-molded article obtained by press-molding the steel sheet. (1) ΔC = (C60-C20/(0.04)
Inventors:
ITO YASUHIRO (JP)
NAGANO MAI (JP)
KAWATA HIROYUKI (JP)
HIRONAKA SATOSHI (JP)
NAGANO MAI (JP)
KAWATA HIROYUKI (JP)
HIRONAKA SATOSHI (JP)
Application Number:
PCT/JP2021/031492
Publication Date:
March 02, 2023
Filing Date:
August 27, 2021
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C22C38/00; C22C38/58; C22C38/60
Domestic Patent References:
| WO2016121388A1 | 2016-08-04 | |||
| WO2016121388A1 | 2016-08-04 | |||
| WO2013047820A1 | 2013-04-04 | |||
| WO2015097882A1 | 2015-07-02 |
Foreign References:
| JP2006161064A | 2006-06-22 | |||
| JPH11199991A | 1999-07-27 | |||
| JP2005220430A | 2005-08-18 | |||
| JP2006104546A | 2006-04-20 | |||
| JP2017048412A | 2017-03-09 |
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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