| 摘要 |
The purpose of the present invention is to provide a spot welded joint with superior joint strength even when the welded joint is obtained by spot welding high strength steel plates to each other. The spot welded joint is a welded joint obtained by superimposing and spot welding two steel plates with plate thicknesses t1 and t2 and is characterized by the diameter of the nuggets formed by spot welding being 3ˆš{(t 1 + t 2 )/2} to or greater (the units for the nugget diameter, t 1 and t 2 being mm), and, at the cross-sectional surface in the direction of plate thickness, the radius of curvature for both ends in the direction of diameter of the nugget being 0.3(t 1 + t 2 ) or greater. |
