Analysis on Pore Formation Mechanism of 2A12 Aluminum Alloy Fusion Welding Process
Taking 2A12 aluminum alloy as research object, the material was studied by experiments in the process of laser welding, the porosity morphology of local remelting area and porosity forming mechanism were analyzed combining with the ideal gas state mathematical model. The results show that, with the increase of laser power, the porosity problem of 2A12 die-casting aluminum alloy in remelting area is serious. The micro pores evolve into macro porosity in the castings, which is the main reason of more porosity in the 2A12 melting weld.