LASER WELDING METHOD

摘要

The purpose of this invention is to provide a laser welding method which is capable of easy application to large members and rectangular members comprising highly reflective material and which suppresses deformation and is capable of high-efficiency, high-quality welding. This laser welding method involves a step for supplying a filler material (1) to the portion to be welded of a base material (3), wherein the base material (3) comprises a metal material, and said filler material (1) has the same main component as the base material (3) and has a smaller volume than the base material (3); and a step for irradiating the portion to be welded with a laser (2) at the same time and/or after the filler material (1) is supplied.