Title:
STEEL SHEET, PLATED STEEL SHEET, PRESS-MOLDED ARTICLE, PROCESSED MEMBER, PRODUCTION METHOD FOR PRESS-MOLDED ARTICLE, AND PRODUCTION METHOD FOR PROCESSED MEMBER
Document Type and Number:
WIPO Patent Application WO/2023/171143
Kind Code:
A1
Abstract:
The purpose of the present invention is to effectively inhibit the occurrence of delayed fracture at a shear end surface of a member in which there is a concern regarding occurrence of delayed fracture in a press-molded article obtained by using a high-strength steel sheet or a plated steel sheet including the high-strength steel sheet as a base sheet. This steel sheet has, on a surface thereof, a coating containing an organic resin and an inorganic material. In the coating, the concentration of the inorganic material in a 20%-coating region on the steel sheet side in the thickness direction is higher than the concentration of the inorganic material in a 20%-coating region on the surface layer side. The steel sheet has a tensile strength of at least 1180 MPa.
Inventors:
HATA KENTARO (JP)
MORIMOTO MINAKO (JP)
OTSUKA SHINJI (JP)
TAKAGI SHUSAKU (JP)
MORIMOTO MINAKO (JP)
OTSUKA SHINJI (JP)
TAKAGI SHUSAKU (JP)
Application Number:
PCT/JP2023/001450
Publication Date:
September 14, 2023
Filing Date:
January 19, 2023
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B21D22/20; C23C26/00; C23C2/06; C23C28/00; C25D5/26; C25D7/00; C09D5/00
Domestic Patent References:
| WO2021200412A1 | 2021-10-07 | |||
| WO2020121899A1 | 2020-06-18 |
Foreign References:
| JP2018168467A | 2018-11-01 | |||
| JP2010090444A | 2010-04-22 |
Attorney, Agent or Firm:
KUMASAKA Akira et al. (JP)
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