Title:
HOT-PRESSED MEMBER AND STEEL SHEET FOR HOT PRESSING
Document Type and Number:
WIPO Patent Application WO/2024/089931
Kind Code:
A1
Abstract:
This hot-pressed member comprising an Al-Zn-based coating layer is free from problems involving chemical convertibility as seen in Al-plated steel sheets and from problems involving LME cracking as seen in Zn-based plated steel sheets, and achieves, at high levels, both spot welding ability and corrosion resistance of a cut portion. This hot-pressed member is provided with: a steel sheet; a coating layer provided on at least one surface of the steel sheet; and an oxide layer disposed on the coating layer. The coating layer has a component composition containing, in mass%, 25.0-55.0% of Zn, 1.1-8.0% of Si, 0.01-5.0% of Sr+Ca, and 55.0% or less of Fe, the remaining portion being Al and unavoidable impurities. A metallic Zn phase is included in the coating layer.
Inventors:
NISHIIKE RYOTO (JP)
SATO RINTA (JP)
MAKIMIZU YOICHI (JP)
SATO RINTA (JP)
MAKIMIZU YOICHI (JP)
Application Number:
PCT/JP2023/021959
Publication Date:
May 02, 2024
Filing Date:
June 13, 2023
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C23C2/26; C21D1/18; C21D9/00; C22C18/00; C22C18/04; C22C21/00; C22C21/10; C22C30/06; C22C38/00; C22C38/06; C22C38/60; C23C2/04; C23C2/12
Domestic Patent References:
| WO2019180853A1 | 2019-09-26 | |||
| WO2021039973A1 | 2021-03-04 |
Foreign References:
| JP2012112010A | 2012-06-14 |
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
Download PDF: