Title:
HIGH-STRENGTH STEEL SHEET AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2016/125463
Kind Code:
A1
Abstract:
This steel sheet has a prescribed component composition, and a microstructure which has a ferrite area ratio of at least 20%, a martensite area ratio of at least 5%, and a tempered martensite area ratio of at least 5%. In the microstructure, the average crystal grain size of the ferrite is not more than 20.0 µm, and the inverse intensity ratios of γ-fibers to α-fibers in the ferrite and the martensite including the tempered martensite respectively are at least 1.00.
Inventors:
MINAMI HIDEKAZU (JP)
KANEKO SHINJIRO (JP)
YOKOTA TAKESHI (JP)
SETO KAZUHIRO (JP)
KANEKO SHINJIRO (JP)
YOKOTA TAKESHI (JP)
SETO KAZUHIRO (JP)
Application Number:
PCT/JP2016/000410
Publication Date:
August 11, 2016
Filing Date:
January 27, 2016
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C22C38/00; C21D9/46; C22C38/14; C22C38/60; C23C2/02; C23C2/06; C23C2/28
Domestic Patent References:
| WO2013073136A1 | 2013-05-23 | |||
| WO2005095663A1 | 2005-10-13 | |||
| WO2008123267A1 | 2008-10-16 | |||
| WO2015015739A1 | 2015-02-05 | |||
| WO2015015738A1 | 2015-02-05 |
Other References:
See also references of EP 3255164A4
Attorney, Agent or Firm:
SUGIMURA, KENJI (JP)
Kenji Sugimura (JP)
Kenji Sugimura (JP)
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