Title:
STEEL SHEET AND PLATED STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2024/053667
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a steel sheet and a plated steel sheet that have high LME resistance and hydrogen desorption. This steel sheet and plated steel sheet are characterized: by having prescribed chemical components; in that the depth in the depth direction from the surface of the steel sheets at which the C concentration as measured by GDS is no more than 0.05% is at least 10 μm; in that the thickness in the depth direction from the surface of the steel sheets of a layer that has a ferrite phase area fraction of at least 90% is at least 20 μm; and in that the Ra surface roughness of the steel sheets is no more than 3.0 μm.
Inventors:
MITSUNOBU TAKUYA (JP)
YOKOYAMA TAKAFUMI (JP)
TAKEBAYASHI HIROSHI (JP)
YOKOYAMA TAKAFUMI (JP)
TAKEBAYASHI HIROSHI (JP)
Application Number:
PCT/JP2023/032500
Publication Date:
March 14, 2024
Filing Date:
September 06, 2023
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C21D3/04; C21D9/46; C22C18/00; C22C38/00; C22C38/58; C23C2/06
Domestic Patent References:
| WO2022149511A1 | 2022-07-14 | |||
| WO2022149507A1 | 2022-07-14 | |||
| WO2022149505A1 | 2022-07-14 | |||
| WO2022097738A1 | 2022-05-12 | |||
| WO2020130631A1 | 2020-06-25 |
Foreign References:
| KR20220019867A | 2022-02-18 |
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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