Title:
STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2018/030400
Kind Code:
A1
Abstract:
A steel sheet has a specified chemical composition and has a steel structure such that, in area ratio, 5%-80% is ferrite and 20%-95% is a hard structure made of bainite, martensite or retained austenite or a chosen combination of same, and the standard deviation for the hard structure line fraction on a line in a plane orthogonal to the thickness direction is 0.050 or less in the range of depths from the surface of 3t/8 to t/2 when t is the thickness of the steel sheet.
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Inventors:
YABU SHOHEI (JP)
UENISHI AKIHIRO (JP)
HAYASHI KOUTAROU (JP)
UENISHI AKIHIRO (JP)
HAYASHI KOUTAROU (JP)
Application Number:
PCT/JP2017/028750
Publication Date:
February 15, 2018
Filing Date:
August 08, 2017
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
C22C38/00; C22C38/58; C21D9/46
Domestic Patent References:
WO2009119751A1 | 2009-10-01 |
Foreign References:
JP2010196115A | 2010-09-09 | |||
JP2009203548A | 2009-09-10 | |||
JP2016510361A | 2016-04-07 | |||
JP2013241636A | 2013-12-05 | |||
JP2011099149A | 2011-05-19 | |||
JP2002105537A | 2002-04-10 | |||
JP2017088944A | 2017-05-25 |
Other References:
See also references of EP 3460088A4
Attorney, Agent or Firm:
KOKUBUN, Takayoshi (JP)
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