Title:
HIGH-STRENGTH COLD ROLLED STEEL SHEET WITH EXCELLENT YIELD STRENGTH AND DUCTILITY, COATED STEEL PLATE, AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2017/171366
Kind Code:
A1
Abstract:
The present invention relates to a high-strength steel sheet for use in lightening materials for electronic products and materials for vehicles including automobiles, trains and ships and, more particularly, to a high strength cold rolled steel sheet, a coated steel plate, and a method for manufacturing the same, wherein yield strength and ductility are improved by controlling the internal oxidation depth and the amount of residual austenite after first annealing, and the high strength cold rolled steel sheet and the coated steel plate can be stably manufactured and provided without any dent defects during the manufacturing thereof.
Inventors:
LEE KYOO-YOUNG (KR)
LEE WON-HWI (KR)
LEE SEA-WOONG (KR)
RYU JOO-HYUN (KR)
LEE WON-HWI (KR)
LEE SEA-WOONG (KR)
RYU JOO-HYUN (KR)
Application Number:
PCT/KR2017/003351
Publication Date:
October 05, 2017
Filing Date:
March 28, 2017
Export Citation:
Assignee:
POSCO (KR)
International Classes:
C22C38/00; C21D8/02; C22C38/02; C22C38/04; C22C38/06; C22C38/12; C22C38/14; C22C38/60
Foreign References:
| KR20150130612A | 2015-11-24 | |||
| KR20040091751A | 2004-10-28 | |||
| KR20130027794A | 2013-03-18 | |||
| JP2008514820A | 2008-05-08 | |||
| KR20120110538A | 2012-10-10 |
Other References:
See also references of EP 3438315A4
Attorney, Agent or Firm:
C&S PATENT AND LAW OFFICE (KR)
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