Effect of two kinds of welding wire on mechanical properties of copper joints

In this paper, aiming at the problems of solidification crack and strength loss, special experiments for copper welding were employed depending on the deoxidation characteristics of the HS201 filler metal and excellent high-temperature performance of Ni-contained B30 welding wire. Through investigating the plasticity, high-temperature strength and ductility of the two kinds of filler metal, the effects of the different filler metal on the T2 copper joints are compared and analyzed, meanwhile, the analysis of the bending property, high temperature tension performance and microstructure of the two joints shows that the strength and ductility of the joints with B30 filler metal are superior to the ones with HS201, for the former, there does not exit defect such as welding cracking, in addition, the welded seam is well fused with the parent metal, thereby problems such as welding joint strength loss and hot cracking have be solved, which provides an effective way of obtaining high-quality copper joint.