Title:
CLAD STEEL PLATE, MEMBER, AND PRODUCTION METHODS FOR SAME
Document Type and Number:
WIPO Patent Application WO/2022/209521
Kind Code:
A1
Abstract:
Provided is a clad steel plate that has a tensile strength (TS) of at least 780 MPa and has excellent bendability, collision resistance properties, and LME resistance properties. According to the present invention, a clad steel plate has a base material and a cladding material that is on front and back surfaces of the base material. The component composition and the steel structure of the base material and the cladding material are properly controlled. The average Vickers hardness (HVL) of the cladding material is no more than 260, and the value of dividing the average Vickers hardness (HVL) of the cladding material by the average Vickers hardness (HVB) of the base material is no more than 0.80. The boundary roughness of the base material and the cladding material is no more than 50 μm by maximum height Ry, and the number of voids at the boundary between the base material and the cladding material is kept to no more than 20 per 10 mm boundary length.
Inventors:
KAWASAKI YOSHIYASU (JP)
TOJI YUKI (JP)
NAKAGAITO TATSUYA (JP)
YAMAGUCHI SHINYA (JP)
UENO MASAYASU (JP)
TAKASHIMA KATSUTOSHI (JP)
ONO TOMOHIRO (JP)
TOJI YUKI (JP)
NAKAGAITO TATSUYA (JP)
YAMAGUCHI SHINYA (JP)
UENO MASAYASU (JP)
TAKASHIMA KATSUTOSHI (JP)
ONO TOMOHIRO (JP)
Application Number:
PCT/JP2022/008472
Publication Date:
October 06, 2022
Filing Date:
February 28, 2022
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B23K20/04; C21D9/46; C22C38/00; C22C38/06; C22C38/60; C23C2/06; C23C2/40; C22C18/00
Domestic Patent References:
| WO2018151331A1 | 2018-08-23 | |||
| WO2020196060A1 | 2020-10-01 | |||
| WO2018210415A1 | 2018-11-22 | |||
| WO2018137781A1 | 2018-08-02 | |||
| WO2017222342A1 | 2017-12-28 |
Foreign References:
| JP2005297013A | 2005-10-27 | |||
| US20200061971A1 | 2020-02-27 | |||
| JP6388099B1 | 2018-09-12 | |||
| JP2020519765A | 2020-07-02 | |||
| JP2020509223A | 2020-03-26 | |||
| JP2019524986A | 2019-09-05 | |||
| JPH0448382B2 | 1992-08-06 |
Other References:
MIZUNUMA ET AL., RIKEN REPORT, vol. 45-4, 1969, pages 79
NAKAGAWA ET AL., JOURNAL OF THE JAPAN SOCIETY FOR TECHNOLOGY OF PLASTICITY, vol. 11-29, 1970, pages 142
MATSUFUJI ET AL., JOURNAL OF THE JAPAN SOCIETY FOR TECHNOLOGY OF PLASTICITY, vol. 14-146, 1973, pages 201
NAKAGAWA ET AL., JOURNAL OF THE JAPAN SOCIETY FOR TECHNOLOGY OF PLASTICITY, vol. 11-29, 1970, pages 142
MATSUFUJI ET AL., JOURNAL OF THE JAPAN SOCIETY FOR TECHNOLOGY OF PLASTICITY, vol. 14-146, 1973, pages 201
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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