Title:
COLD ROLLED STEEL SHEET AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2023/113554
Kind Code:
A1
Abstract:
A cold rolled steel sheet according to an embodiment of the present invention comprises, by wt%: C: 0.01 to 0.10%; Mn: 0.1 to 0.4%; Al: 0.01 to 0.10%; P: 0.003 to 0.020%; N: 0.001 to 0.006%; S: 0.015% or less; Cr: 0.1 to 0.4%; B: 0.0005 to 0.0035%; Ni: 0.04 to 0.10%; and the balance Fe and other unavoidable impurities, and comprises a (Cr-B)(C-N)-based composite precipitate having a size of 0.01 to 0.1 μm, wherein a [I(222)+I(554)]/I(200) texture ratio is 5.0 to 10.0, an earing rate is less than 3.0%, and an alloying rate of an alloy layer may be 5 to 15%.
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Inventors:
KIM JAIIK (KR)
Application Number:
PCT/KR2022/020630
Publication Date:
June 22, 2023
Filing Date:
December 16, 2022
Export Citation:
Assignee:
POSCO CO LTD (KR)
International Classes:
C22C38/54; C21D8/02; C21D9/46; C25D3/00
Foreign References:
| KR20100001334A | 2010-01-06 | |||
| KR20180073407A | 2018-07-02 | |||
| JP2007070659A | 2007-03-22 | |||
| KR20210079720A | 2021-06-30 | |||
| JP2015206086A | 2015-11-19 |
Attorney, Agent or Firm:
YOU ME PATENT AND LAW FIRM (KR)
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