[China Aluminum Network] 1. Selection of welding methods and speeds There are many methods for welding aluminum alloys, including inert gas shielded welding (MIG) and tungsten inert gas shielded welding (TIG). During welding, for the welding of thicker splints, in order to ensure the quality of the welds, the welds should be evenly fused from the points, and the gas in the welds should be allowed to flow out smoothly, using slower link speeds and larger currents. Welding; For the welding of thinner plates, in order to avoid the welds from being too hot, a faster welding speed and a smaller current must be used in the welding process to ensure the quality of welding and to avoid the formation of pores.
2, the formation of pores Aluminum oxide film on the surface has a strong water absorption, when the environment humidity is large, the absorption of a lot of water oxide film in the role of the arc under the water decomposition of hydrogen, and hydrogen in the bath without time exclusion Air holes formed.
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