Spot Welded Joint, Method For Producing Spot Welded Joint, High Strength Steel Member For Spot Welded Joint, And Method For Producing High Strength Steel Member For Spot Welded Joint

Abstract: A spot-welded joint according to one aspect of the present invention comprises: a plurality of steel plate portions including a high-strength steel plate portion having a Vickers hardness of 530 HV or more; a nugget where the high-strength steel plate portion and other steel plate portions among the plurality of steel plate portions are joined together; and a corona bond which is formed in a ring shape around the nugget in a plan view from the direction perpendicular to the surface of the high-strength steel plate portion and in which the high-strength steel plate portion and other steel plate portions are solid-phase joined together, wherein in the region where the corona bond is present, there is no plating layer, and the corona bond has an oxygen concentration of 15.0 mass% or less at a position 50 µm outside the outer periphery of the nugget in a plan view.

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