PLATED STEEL SHEET FOR SPOT WELDING USE, JOINING MEMBER, AUTOMOTIVE MEMBER, AND METHOD FOR MANUFACTURING JOINING MEMBER

Title:

PLATED STEEL SHEET FOR SPOT WELDING USE, JOINING MEMBER, AUTOMOTIVE MEMBER, AND METHOD FOR MANUFACTURING JOINING MEMBER

Document Type and Number:

WIPO Patent Application WO/2022/107580

Kind Code:

A1

Abstract:

Provided is a plated steel sheet for spot welding use, which comprises: a base steel sheet which has a steel composition containing, in % by mass, 0.05 to 0.70% of C, 3.50% or less of Si, 8.00% or less of Mn, 0.020% or less of P, 0.050% or less of S, 3.000% or less of Al, and 0.010% or less of N, and also containing an arbitrarily selected element, with the remainder comprising Fe and impurities, in which the thickness of an inner oxide layer corresponds to a depth of less than 5.0 μm from the surface thereof; and a plating layer which is formed on one surface or both surfaces of the base steel sheet, and is composed of one or more layers, in which Zn and Ni are contained as at least a portion of the plating layer and the Ni content in the whole of the plating layer is 2.0% by mass or more. The plated steel sheet has tensile strength of 780 MPa or more. Also provided are a joining member, an automotive member, and a method for manufacturing a joining member, in each of which the plated steel sheet is used. A Ni-containing foil may be applied in place of the Ni-containing plating layer.

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Inventors:

YOSHINAGA CHISATO (JP)
NAKAMURA TOYOMITSU (JP)
KODAMA SHINJI (JP)
MITSUNOBU TAKUYA (JP)

Application Number:

PCT/JP2021/040169

Publication Date:

May 27, 2022

Filing Date:

October 29, 2021

Export Citation:

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Assignee:

NIPPON STEEL CORP (JP)

International Classes:

B23K11/11; C23C28/02; C21D9/46; C22C18/00; C22C19/03; C22C38/00; C22C38/60; C23C2/06

Domestic Patent References:

WO2019082036A1	2019-05-02
WO2019082037A1	2019-05-02
WO2019116531A1	2019-06-20

Foreign References:

US20160319415A1

2016-11-03

Attorney, Agent or Firm:

TAIYO, NAKAJIMA & KATO (JP)

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