Title:
SPOT WELDING MEMBER
Document Type and Number:
WIPO Patent Application WO/2020/130079
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a spot welding member having a spot welding part formed by spot welding a plurality of steel sheets that include zinc-based plating layers. The present invention is a spot welding member having a spot welding part formed by spot welding a sheet assembly in which a plurality of steel sheets are overlapped, the sheet assembly being sandwiched between a pair of electrodes, wherein: at least one of the plurality of steel sheets is a high-strength zinc-plated steel sheet having a tensile strength of 780 MPa or higher, the Al content of the plating on the high-strength zinc-plated steel sheet being 0.5 mass% or higher; and, at the interface of the plating and a parent-material steel sheet of the high-strength zinc-plated steel sheet, a thermal shock region on the outer side of a corona-bond end part of the spot welding part has an FeAl alloy layer having an average thickness of 0.3 μm or higher and a plating layer in which a zinc-based plating layer having an average thickness of 2.0 μm or higher is formed on the FeAl alloy layer.
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Inventors:
TANAKA MINORU (JP)
TANIGUCHI KOICHI (JP)
SATO RINTA (JP)
TAKASHIMA KATSUTOSHI (JP)
MATSUDA HIROSHI (JP)
IKEDA RINSEI (JP)
TANIGUCHI KOICHI (JP)
SATO RINTA (JP)
TAKASHIMA KATSUTOSHI (JP)
MATSUDA HIROSHI (JP)
IKEDA RINSEI (JP)
Application Number:
PCT/JP2019/049846
Publication Date:
June 25, 2020
Filing Date:
December 19, 2019
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B23K11/16; C22C18/04; C22C21/10; C22C38/00; C22C38/04; C22C38/14; C23C2/06; C23C2/40
Domestic Patent References:
| WO2017104647A1 | 2017-06-22 |
Foreign References:
| JP2016562041A | 2016-03-30 |
Other References:
TANIGUCHI ET AL.: "National Meeting of Japan Welding Society, Heisei", vol. 29, 2017, SPRING NATIONAL MEETING, article "Development of resistance spot welding technology to suppress LME crack in ultra-high strength steel sheets (3rd report"
SAWANISHI ET AL.: "Preprints of the National Meeting of Japan Welding Society, Heisei", vol. 29, 2017, SPRING NATIONAL MEETING, article "Development of resistance spot welding technology to suppress LME crack in ultra-high strength steel sheets (2nd report"
SAWANISHI ET AL.: "Preprints of the National Meeting of Japan Welding Society, Heisei", vol. 29, 2017, SPRING NATIONAL MEETING, article "Development of resistance spot welding technology to suppress LME crack in ultra-high strength steel sheets (2nd report"
Attorney, Agent or Firm:
KUMASAKA Akira et al. (JP)
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