Determination of Welding Process for Wheel Rims Using Domestic Materials

The welding processes for wheel rims using domestic materials and imported material were studied as well as the microstructure of weld seam and the fatigue life of wheels, in order to achieve localization of rim materials. The results show that the fatigue life of rims welded by the original welding process was low, which cannot meet the technical requirements, mainly because there were some big hydrogen holes in the weld and the welding heat input was excessive. After plus the dehydrogenation process, the pores in the weld disappeared. Reducing the heat input by the decrease of welding voltage and reducing welding speed properly could significantly increase the fatigue life of wheels using different materials, which made the quality of wheel rims using domestic material meet the requirements.