Manufacturing Method For Arc Welded Joint, Arc Welded Joint, And Vehicle Component

Abstract: 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.

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