Hongyang Wang
Dalian University of Technology, China
Title: The welding modes in Laser-arc hybrid lap welding of dissimilar metals
Biography
Biography: Hongyang Wang
Abstract
The pluse laser-tungsten inert gas hybrid welding method was adopted to realize the welding dissimilar alloys process. The welding modes in the laser-arc hybrid welding lap joint were changed with the varying of laser and arc parameters, which made obviously eff ects on the dissimilar joints. In Ti and steel dissimilar welding lap joint with Cu interlayer, the welding mode in both of Ti and steel fusion zone were in conductive mode and the thickness of the intermetallic was limited by the accurate control of the welding heat. In Mg and Al alloys dissimilar welding lap joint with Ni interlayer, the welding mode in Mg fusion zone was in keyhole mode and Al fusion zone in conductive mode and the intermetallics was inhibited by the welding mode and interlayer. In Al and steel dissimilar welding lap joint with Cu interlayer, the welding modes in both of Al and steel fusion zone were in keyhole mode, but the thickness of the Al-Fe intermetallic was less than 10μm, which was reduced by the hybrid eff ect of the Cu interlayer and the welding sources. Th e welding mode should be changed by the character of the dissimilar metals. Th e formation and distribution of the intermetallic was decided by the welding sources, base metal and the welding process, which made obvious eff ect on the property of the joint.