Title:
STEEL SHEET FOR HOT STAMPING AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2022/255587
Kind Code:
A1
Abstract:
According to an aspect of the present invention, provided is a steel sheet for hot stamping, comprising 0.17-0.25 wt% of carbon (C), 0.3-1.0 wt% of silicon (Si), 0.6-1.0 wt% of manganese (Mn), 0.02 wt% or less of phosphorus (P), 0.01 wt% or less of sulfur (S), 0.1-1.0 wt% of aluminum (Al), 0.001-0.005 wt% of boron (B), 0.01-0.1 wt% of titanium (Ti), 0.02-0.06 wt% of niobium (Nb), 0.3-1.0 wt% of the combined amount of at least one selected from chromium (Cr), nickel (Ni), and molybdenum (Mo), and the remainder of iron (Fe) and other inevitable impurities, wherein the microstructure thereof comprises, by area fraction, 60-99% of ferrite and 1-30% of pearlite, and comprises first regions which include 0.19-0.55 wt% of C and 0.8-6.0 wt% of Mn and in which pearlite is locally integrated.
Inventors:
YOO BYUNG GIL (KR)
KIM JE WOO SOO (KR)
DO HYEONG HYEOP (KR)
HAN SEONG KYUNG (KR)
KIM JE WOO SOO (KR)
DO HYEONG HYEOP (KR)
HAN SEONG KYUNG (KR)
Application Number:
PCT/KR2022/001481
Publication Date:
December 08, 2022
Filing Date:
January 27, 2022
Export Citation:
Assignee:
HYUNDAI STEEL CO (KR)
International Classes:
C22C38/50; B21C47/02; C21D8/02; C22C38/06; C22C38/44; C22C38/54
Foreign References:
| KR20210060550A | 2021-05-26 | |||
| JP2005002441A | 2005-01-06 | |||
| KR20210037115A | 2021-04-06 | |||
| US20130220490A1 | 2013-08-29 | |||
| KR20150075329A | 2015-07-03 | |||
| KR20170076009A | 2017-07-04 | |||
| KR20190095858A | 2019-08-16 |
Attorney, Agent or Firm:
Y.P.LEE, MOCK & PARTNERS (KR)
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