Title:
PLATED STEEL SHEET FOR HOT PRESS FORMING, HAVING EXCELLENT PLATING QUALITY, STEEL SHEET AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2023/239207
Kind Code:
A1
Abstract:
The present invention relates to a hot-dipped steel sheet having excellent plating quality, a plating steel sheet for manufacturing same, and a manufacturing method therefor. A steel sheet for hot press forming, according to one aspect of the present invention, comprises, by wt%, 0.1 to 4% of Mn, 0.001 to 2% of Si, 0.02 to 0.6% of C, 0.001 to 1% of Al, 0.05% or less of P, 0.02% or less of S, 1% or less of Cr, 0.01% or less of B, and the balance of Fe and inevitable impurities, and each of the GDS profile of the Mn component and the GDS profile of the Si component, which are observed in the depth direction from the surface, sequentially includes a maximum point and a minimum point, wherein the difference (converted concentration difference of Mn) between the value obtained by dividing the Mn concentration of the Mn component at the maximum point in the GDS profile by the Mn concentration of a base material, and the value obtained by dividing the Mn concentration of the Mn component at the minimum point in the GDS profile by the Mn concentration of the base material can be greater than or equal to 10%, and the difference (converted concentration difference of Si) between the value obtained by dividing the Si concentration of the Si component at the maximum point in the GDS profile by the Si concentration of the base material, and the value obtained by dividing the Si concentration of the Si component at the minimum point in the GDS profile by the Si concentration of the base material can be greater than or equal to 10%. The point at a 5 μm depth is considered the point at which the minimum point appears if the minimum point is not to appear within a 5 μm depth.
Inventors:
KIM SANG-HEON (KR)
JUNG JIN-HO (KR)
LEE WON-HWI (KR)
KWON SEONG-CHOON (KR)
KANG KI-CHEOL (KR)
JUNG JIN-HO (KR)
LEE WON-HWI (KR)
KWON SEONG-CHOON (KR)
KANG KI-CHEOL (KR)
Application Number:
PCT/KR2023/007970
Publication Date:
December 14, 2023
Filing Date:
June 09, 2023
Export Citation:
Assignee:
POSCO CO LTD (KR)
International Classes:
C23C28/00; C23C2/06; C23C2/40; C23C28/02; C25D3/20; C25D5/50; C25D7/06; C25D9/04; C25D9/06
Domestic Patent References:
| WO2021166350A1 | 2021-08-26 |
Foreign References:
| KR20130077907A | 2013-07-09 | |||
| KR20150061407A | 2015-06-04 | |||
| JP2000309824A | 2000-11-07 | |||
| KR20070050497A | 2007-05-15 |
Attorney, Agent or Firm:
C&S PATENT AND LAW OFFICE (KR)
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