Abstract
A novel application of Tungsten/Metal Gas Suspended Arc Welding (T/M-GSAW) was conducted to achieve a bond between copper and stainless steel. The joints were made at different welding currents and welding speeds. The microstructure of the weld interface was investigated. The bonding quality of the joints was examined by standard tensile tests. Effects of the welding parameters on the tensile strength of joints were analyzed. Based on the results, a sound joint of welding–brazing was formed, with no copper-penetrating crack. Compared with conventional welding, the welding heat input of T/M-GSAW was smaller, and the welding efficiency was higher. From the top to the bottom of the joint, the interfacial zone became thinner and simpler and varied from the Fe–Cu mixing zone to the Fe–Cu diffusing zone. The welding parameters were optimized, and the tensile strength is highest when the welding current is 120A and the welding speed is 300mm/min.
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