LASER WELDED JOINT AUTOMOTIVE PART METHOD FOR PRODUCING LASER WELDED JOINT AND METHOD FOR MANUFACTURING AUTOMOTIVE PART

摘要

This laser welded joint is a laser welded joint having welding metals provided between a plurality of steel sheets wherein the welding metals have a chemical composition of predetermined components the average hardness of the welding metals is 350 540 in Vickers hardness the distribution density of porosities having diameters of 2 50 µm in the welding metals is 5.0 pieces/mm or less and the distribution density of oxide inclusions having diameters of 3 µm or more in the welding metals is 0.1 8.0 pieces/mm.