Title:
STEEL SHEET HAVING HIGH STRENGTH AND HIGH FORMABILITY AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2021/100995
Kind Code:
A1
Abstract:
A steel sheet having high strength and high formability according to an aspect of the present invention comprises, in wt%: 0.12-0.22% of carbon (C); 1.6-2.4％ of silicon (Si); 2.0-3.0％ of manganese (Mn); 0.01-0.05％ of aluminum (Al); greater than 0 and less than or equal to 0.05％ of the sum of one or more of titanium, (Ti), niobium (Nb) and vanadium (V); 0.015% or less of phosphorus (P); 0.003％ or less of sulfur (S); 0.006％ or less of nitrogen (N); and the remainder of Fe and inevitable impurities, and has a yield strength (YS) of 850 MPa or greater, a tensile strength (TS) of 1180 MPa or greater, an elongation ratio (EL) of 14% or greater, and a hole expansion ratio (HER) of 30% or greater.
Inventors:
OH GYU JIN (KR)
GOO NAM HOON (KR)
SHIN KYEONG SIK (KR)
UM HO YONG (KR)
GOO NAM HOON (KR)
SHIN KYEONG SIK (KR)
UM HO YONG (KR)
Application Number:
PCT/KR2020/006384
Publication Date:
May 27, 2021
Filing Date:
May 15, 2020
Export Citation:
Assignee:
HYUNDAI STEEL CO (KR)
International Classes:
C22C38/04; C21D8/04; C22C38/02; C22C38/06; C22C38/12
Foreign References:
| KR20190123551A | 2019-11-01 | |||
| KR20190111848A | 2019-10-02 | |||
| KR20120138900A | 2012-12-27 | |||
| KR101677396B1 | 2016-11-18 | |||
| JP2000212684A | 2000-08-02 |
Attorney, Agent or Firm:
AJU INTERNATIONAL LAW & PATENT GROUP (KR)
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