Title:
PLATED STEEL SHEET FOR HOT PRESS FORMING HAVING EXCELLENT PLATING QUALITY, STEEL SHEET, AND RESPECTIVE METHODS FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2023/239209
Kind Code:
A1
Abstract:
The present invention relates to: a hot-dip plated steel sheet having excellent plating quality; a steel sheet for plating, for manufacturing same; and respective methods for manufacturing same. A steel sheet for hot press forming, according to one aspect of the present invention, has a composition comprising, in wt%: 0.1-4% of Mn; 0.001-2% of Si; 0.02-0.6% of C; 0.001-1% 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 a balance of Fe and inevitable impurities, wherein each of a GDS profile of the Mn component and a 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, and the difference (reduced concentration difference of Mn) between a value obtained by dividing the concentration of Mn at the maximum point of the GDS profile of the Mn component by the concentration of Mn of a base material, and a value obtained by dividing the concentration of Mn at the minimum point of the GDS profile of the Mn component by the concentration of Mn of the base material may be 80% or greater, and the difference (reduced concentration difference of Si) between a value obtained by dividing the concentration of Si at the maximum point of the GDS profile of the Si component by the concentration of Si of the base material, and a value obtained by dividing the concentration of Si at the minimum point of the GDS profile of the Si component by the concentration of Si of the base material may be 50% or greater. Here, if the minimum point does not appear within a depth of 5 µm, the 5 µm-depth point is considered to be the point at which the minimum point appears.
More Like This:
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/KR2023/007972
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)
Download PDF: