What kind of welding machine is used for tungsten arc welding of aluminum-magnesium alloy?

Using an AC and DC square wave pulse argon arc welding machine, other metals can actually be welded with DC, but there is an oxide film on the surface of the aluminum profile, which may require a high temperature of more than 800 to melt, but If this high temperature is not controlled well, all the aluminum inside will melt, and the melting depth of the material cannot be controlled, so AC square waves are needed to melt it. The main function of pulse is that because the surface temperature of the material is too high, thermal stress will cause the material to deform. In order to prevent deformation and save resources, pulse is needed