Title:
WELD JOINT AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2024/070192
Kind Code:
A1
Abstract:
Provided is a weld joint having relatively thin high-strength steel plates as a base material and excellent room-temperature fracture toughness. In the present invention, the plate thickness of the base-material steel plates is 0.8-10 mm, at least one of the base-material steel plates has a tensile strength of at least 980 MPa and a steel structure in which the total area fraction of martensite and bainite is more than 50%, and the amount of oxygen in the welded metal in welded sections and the total area fraction of the martensite and bainite in the welded metal satisfy a prescribed relationship.
Inventors:
SAWANISHI CHIKAUMI (JP)
TAKASHIMA KATSUTOSHI (JP)
KONISHI KYOHEI (JP)
TANIGUCHI KOICHI (JP)
TAKASHIMA KATSUTOSHI (JP)
KONISHI KYOHEI (JP)
TANIGUCHI KOICHI (JP)
Application Number:
PCT/JP2023/028017
Publication Date:
April 04, 2024
Filing Date:
July 31, 2023
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C22C38/00; B23K9/02; B23K9/23; B23K35/30; C22C38/58
Domestic Patent References:
| WO2019035490A1 | 2019-02-21 | |||
| WO2018159404A1 | 2018-09-07 | |||
| WO2020196869A1 | 2020-10-01 | |||
| WO2011037272A1 | 2011-03-31 |
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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