Lap laser welded joint, manufacturing method of lap laser welded joint, and skeletal parts for automobile

摘要

It is an object of the present invention to provide a lap laser welded joint, a method of manufacturing the lap laser welded joint, and a vehicle skeleton part having the lap laser welded joint. The present invention is a lap laser welded joint having a welded portion joined by lap laser welding to a lap portion obtained by superposing a plurality of steel plates, wherein the weld portion is a main weld portion penetrating the steel plate of the lap portion. And a final weld having a crater formed at one end of the main weld, and the weld satisfies the equations (1) to (4). L ≧ 15.0 (1) 10.0 ≧ L2 ≧ 2lc (2) t1 ≧ 2dc (3) wc dc (4)