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Title:
ULTRAHIGH-STRENGTH AND HIGH-DUCTILITY STEEL SHEET HAVING EXCELLENT COLD FORMABILITY, AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2019/093650
Kind Code:
A1
Abstract:
The present invention relates to an automotive steel sheet and, more specifically, provides: an ultrahigh-strength and high-ductility steel sheet ensuring ultrahigh strength and high ductility and, simultaneously, having excellent cold formability due to a high yield strength ratio, and improved collision characteristics.

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Inventors:
RYU JOO-HYUN (KR)
LEE KYOO-YOUNG (KR)
LEE SEA-WOONG (KR)
Application Number:
PCT/KR2018/010907
Publication Date:
May 16, 2019
Filing Date:
September 17, 2018
Export Citation:
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Assignee:
POSCO (KR)
International Classes:
C22C38/04; C21D8/02; C21D9/46; C22C38/12; C22C38/14; C23C2/06; C23C2/28
Domestic Patent References:
WO2011122237A12011-10-06
Foreign References:
KR101677396B12016-11-18
KR20170075853A2017-07-04
KR101639919B12016-07-15
KR20140075789A2014-06-19
JP2003138345A2003-05-14
KR101839235B12018-03-16
KR20130138039A2013-12-18
Other References:
See also references of EP 3708691A4
Attorney, Agent or Firm:
C&S PATENT AND LAW OFFICE (KR)
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