Title:
ULTRA-HIGH STRENGTH STEEL SHEET HAVING EXCELLENT BENDABILITY AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2018/117501
Kind Code:
A1
Abstract:
The present invention relates to an ultra-high strength steel sheet used as a material of a vehicle and, more specifically, to an ultra-high strength steel sheet having excellent bendability and a manufacturing method therefor. According to the present invention, there is an effect of providing a steel sheet by utilizing a continuous annealing furnace without having water quenching equipment, thereby simultaneously ensuring a tensile strength of 1200 MPa or greater compared with that of conventional super high strength martensite steel and having excellent shape and bending properties.
Inventors:
KOO MIN-SEO (KR)
KIM SEONG-WOO (KR)
KIM SEONG-WOO (KR)
Application Number:
PCT/KR2017/014332
Publication Date:
June 28, 2018
Filing Date:
December 07, 2017
Export Citation:
Assignee:
POSCO (KR)
International Classes:
C22C38/38; C21D8/02; C22C38/00; C22C38/02; C22C38/06; C22C38/26; C22C38/28; C22C38/32
Foreign References:
| JP2015180766A | 2015-10-15 | |||
| JP2015117403A | 2015-06-25 | |||
| JP2013216946A | 2013-10-24 | |||
| KR20160013155A | 2016-02-03 | |||
| JP2006083403A | 2006-03-30 | |||
| JP2010090432A | 2010-04-22 | |||
| JP2011246746A | 2011-12-08 | |||
| KR20140030970A | 2014-03-12 |
Other References:
See also references of EP 3556894A4
Attorney, Agent or Firm:
C&S PATENT AND LAW OFFICE (KR)
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