Title:
METHOD FOR SUPPRESSING FATIGUE CRACK PROGRESSION IN BENT SECTION OF METAL PLATE AND AUTOMOBILE COMPONENT
Document Type and Number:
WIPO Patent Application WO/2023/112390
Kind Code:
A1
Abstract:
A method for suppressing fatigue crack progression in a bent section of a metal plate according to the present invention suppresses the progression of a fatigue crack in a bent section 3 formed by bending a metal plate 1. The method involves generating compressive residual stress by applying plastic strain at least within a range from a bend start point to a bend end point on the inside of the bend of the bent section 3 in a direction orthogonal to the valley line direction at an interval less than the plate thickness of the metal plate 1 along the valley line direction of the bent section 3.
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Inventors:
YAMAGUCHI NAOKI (JP)
Application Number:
PCT/JP2022/031204
Publication Date:
June 22, 2023
Filing Date:
August 18, 2022
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B21D22/26; B21D5/01; B23P9/04; C21D7/06
Foreign References:
| JP2021045783A | 2021-03-25 | |||
| JPS52133864A | 1977-11-09 | |||
| JPH08117879A | 1996-05-14 | |||
| JP2016107310A | 2016-06-20 | |||
| JP2018051608A | 2018-04-05 | |||
| JP2018051609A | 2018-04-05 | |||
| JP2000225567A | 2000-08-15 | |||
| JP4441641B1 | 2010-03-31 |
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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