Title:
PLATED STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2023/054705
Kind Code:
A1
Abstract:
The present invention provides a high-strength plated steel sheet excellent in LME resistance. This plated steel sheet has a Zn-containing plating layer on a steel sheet. The steel sheet has a tensile strength of 780 MPa or higher; the steel sheet has a chemical component composition comprising, by mass%, 0.05 to 0.40% of C, 0.2 to 3.0% of Si, 0.1 to 5.0% of Mn, 0.4 to 1.50% of sol. Al, etc., and the balance Fe and impurities; and in any vertical cross-section of the steel sheet, a region up to 2 µm deep from the surface contains ferrite phases having an equivalent circle diameter of 1 µm or less at a number density of 2 to 30/µm2, and the ferrite phase contains internal oxides having an equivalent circle diameter of 2 to 100 nm at a number density of 3/µm2 or higher.
Inventors:
MITSUNOBU TAKUYA (JP)
MATSUDA KEITARO (JP)
TAKEBAYASHI HIROSHI (JP)
MATSUDA KEITARO (JP)
TAKEBAYASHI HIROSHI (JP)
Application Number:
PCT/JP2022/036832
Publication Date:
April 06, 2023
Filing Date:
September 30, 2022
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C22C38/00; C21D9/46; C22C38/58; C23C2/06
Domestic Patent References:
| WO2019116531A1 | 2019-06-20 | |||
| WO2014102901A1 | 2014-07-03 | |||
| WO2021112584A1 | 2021-06-10 | |||
| WO2022149511A1 | 2022-07-14 | |||
| WO2022071305A1 | 2022-04-07 |
Foreign References:
| JP2020524743A | 2020-08-20 | |||
| JP2020179413A | 2020-11-05 |
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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