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Title:
STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2018/138791
Kind Code:
A1
Abstract:
This steel sheet has a prescribed chemical composition, and has a metal structure represented by, in terms of area fraction, 50-95% ferrite, 5-48% granular bainite, 2-30% martensite, and a total of 5% or less of upper bainite, lower bainite, tempered martensite, residual austenite and perlite.

Inventors:
NAKANO KATSUYA (JP)
HAYASHI KUNIO (JP)
TODA YURI (JP)
SAKURADA EISAKU (JP)
UENISHI AKIHIRO (JP)
Application Number:
PCT/JP2017/002472
Publication Date:
August 02, 2018
Filing Date:
January 25, 2017
Export Citation:
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Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
C22C38/00
Domestic Patent References:
WO2013051714A12013-04-11
Foreign References:
JPS54163719A1979-12-26
JP2007070661A2007-03-22
JP2007070659A2007-03-22
JP2007070648A2007-03-22
JP2007070649A2007-03-22
JP2015078398A2015-04-23
Other References:
YURI KITAJIMA ET AL.: "Electron Channeling Contrast-zo o Mochiita Ferrite to Granular Bainite no Shikibetsu", CURRENT ADVANCES IN MATERIALS AND PROCESSES, vol. 26, no. 2, 1 September 2013 (2013-09-01), pages 896, XP009515411
Attorney, Agent or Firm:
KOKUBUN, Takayoshi (JP)
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