Welding Performance of Several Rare Earth Tungsten Electrodes in 5A62 Aluminum Alloy

To search the energy saving, environmental protection and excellent welding electrode to replace ThO₂-tungsten electrode. The article study the effects of multivariate rare earth tungsten electrode, ThO₂-tungsten electrode, CeO₂-tungsten electrode according to tungsten inert gas (TIG) welding experiment and test the burning consumption indicates that the burning consumption of ThO₂-tungsten electrode is the worst, the multivariate rare earth electrode is prior to the CeO₂-tungsten electrode; the welding depth and width are related to the welding current and speed; the multivariate rare earth tungsten electrode is better than ThO₂-tungsten electrode and CeO₂-tungsten electrode, while CeO₂-tungsten electrode is prior to ThO₂-tungsten electrode; compared the microstructure, hardness, morphology of fracture and tensile test of CeO₂-tungsten electrode and multivariate rare earth tungsten electrode welded joints shows that the multivariate rare earth tungsten electrode is better than ThO₂-tungsten electrode and CeO₂-tungsten electrode, which can replace ThO₂-tungsten electrode and CeO₂-tungsten electrode to weld aluminum alloy.