METHOD FOR MANUFACTURING ARC WELDED JOINT, ARC WELDED JOINT, AND AUTOMOTIVE COMPONENT

WIPO Patent Application WO/2023/243728

A1

A method for manufacturing an arc welded joint according to an embodiment of the present invention comprises: stacking a first steel sheet and a second steel sheet in a sheet thickness direction so that an end portion of the first steel sheet is disposed on the surface of the second steel sheet; and arc-welding the end portion of the first steel sheet and the surface of the second steel sheet, the end portion being laid over the surface, to form a weld bead. The surface of the second steel sheet has a zinc-based plating. The arc welding is weaving arc welding in which the torch performs a periodically undulating motion in a direction transverse to the welding direction. The sheet thickness tL (mm) of the second steel sheet and the weaving wavelength y (mm) of the torch during weaving arc welding have values such that y/tL≤2.8 is satisfied. The width w (mm) of the weld bead and the sheet thickness tL of the second steel sheet have values such that 3.3≤w/tL≤7.0 is satisfied. During the weaving arc welding, a droplet transfer frequency D (times/second) from the torch to a molten pool and the undulation frequency f (Hz) have values such that D/f≥25 is satisfied.

MATSUDA KAZUKI (JP)
KODAMA SHINJI (JP)
ISHIDA YOSHINARI (JP)
MATSUBA MASAHIRO (JP)

PCT/JP2023/022494

December 21, 2023

June 16, 2023

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NIPPON STEEL CORP (JP)

B23K9/095; B23K9/00; B23K9/02; B23K9/12

WO2018079131A1

2018-05-03

JP2012101232A	2012-05-31
JP2020528006A	2020-09-17
JPS61108478A	1986-05-27

MATSUNUMA Yasushi et al. (JP)

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