Title:
STEEL MEMBER, STEEL SHEET, AND METHODS FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2020/162509
Kind Code:
A1
Abstract:
The objective of the present invention is to provide a steel member and a steel sheet that have high tensile strength and toughness, and also have excellent hydrogen embrittlement resistance in corrosive environments, and to provide methods for producing the same. A steel member according to the present invention is characterized by having a predetermined chemical composition, wherein the maximum Cu content at a depth range within 0-30 μm from the surface is at least 1.4 times greater than the Cu content at a depth of 200 μm from the surface.
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Inventors:
TABATA SHINICHIRO (JP)
KUSUMI KAZUHISA (JP)
HIKIDA KAZUO (JP)
IRIKAWA HIDEAKI (JP)
KUSUMI KAZUHISA (JP)
HIKIDA KAZUO (JP)
IRIKAWA HIDEAKI (JP)
Application Number:
PCT/JP2020/004421
Publication Date:
August 13, 2020
Filing Date:
February 05, 2020
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C22C38/00; C21D1/18; C21D9/00; C21D9/46; C22C38/60
Domestic Patent References:
| WO2017141953A1 | 2017-08-24 | |||
| WO2017141952A1 | 2017-08-24 |
Foreign References:
| JP2010111950A | 2010-05-20 | |||
| KR20090071163A | 2009-07-01 | |||
| JP2002102980A | 2002-04-09 | |||
| JP2012180594A | 2012-09-20 | |||
| JP2012001802A | 2012-01-05 | |||
| JP2003268489A | 2003-09-25 | |||
| JP2017179589A | 2017-10-05 | |||
| JP2015113500A | 2015-06-22 | |||
| JP2017525849A | 2017-09-07 | |||
| JP2011122207A | 2011-06-23 | |||
| JP2011246801A | 2011-12-08 | |||
| JP2012001816A | 2012-01-05 |
Other References:
See also references of EP 3854900A4
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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