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Patent Searching and Data


Title:
METHOD FOR IMPROVING DELAYED FRACTURE CHARACTERISTICS OF STEEL SHEET, METHOD FOR PRODUCING BLANK, METHOD FOR PRODUCING PRESS-FORMED ARTICLE, AND PRESS-FORMED ARTICLE
Document Type and Number:
WIPO Patent Application WO/2023/037961
Kind Code:
A1
Abstract:
In order to suppress, by a simple method, delayed fracture from a sheared-end face after forming, the present invention provides a method for improving the delayed fracture characteristics of a metal sheet comprising a high-strength steel sheet. The present invention is a method for improving delayed fracture characteristics of a metal sheet (10) that comprises a high-strength steel sheet and has a sheared-end face (10A) in at least a portion of a sheet end section. Plastic deformation is imparted to at least a portion of the sheared-end face (10A) of the metal sheet (10).

Inventors:
MATSUKI YUICHI (JP)
SHINMIYA TOYOHISA (JP)
NAKAGAWA KINYA (JP)
YAMASAKI YUJI (JP)
Application Number:
PCT/JP2022/032988
Publication Date:
March 16, 2023
Filing Date:
September 01, 2022
Export Citation:
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Assignee:
JFE STEEL CORP (JP)
International Classes:
B21D1/06
Foreign References:
JP2006224151A2006-08-31
JPS5855128A1983-04-01
JP2017125228A2017-07-20
JPH09122756A1997-05-13
JP2019089076A2019-06-13
Attorney, Agent or Firm:
TANAKA Hidetetsu et al. (JP)
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