Combined welding method of laser welding and arc welding of T type joint

摘要

A hybrid welding method of laser welding and arc welding for a T-joint in which a rib as one member to be welded abuts orthogonally onto a surface of a flange as other member to be welded includes forming a groove portion on a lateral surface of the rib that is an abutting part between the rib and the flange forming the T-joint; forming a flat part at a bottom part of the groove portion formed in the abutting part between the rib and the flange; and performing a hybrid welding using both laser welding in which the groove portion A with this flat part therein is irradiated with a laser beam, and arc welding, to form weld beads of weld metal in the groove portion A, so that welding together the flange and the rib forming the T-joint.