| In recent years, magnesium alloy welding technology has been developed rapidly, but in the welding process prone to cracks, porosity and other welding defects, these defects seriously restrict the development of magnesium alloy welding technology. Therefore, this paper on AZ31 B magnesium alloy were non consumable de-gmaw(Non-consumable double electrode gas metal arc welding) welding, study the welding cracks appeared in the process, analysis of the crack reason, and research process parameters on crack, crack prevention measures.In this paper, the influence of AZ31 B magnesium alloy on the crack of DE-GMAW welding is analyzed from two aspects of metallurgical factors and welding process. Measures to prevent crack is mainly to reduce the content of magnesium alloy of Al and Zn, moderate welding process parameters, including the welding speed, welding current, welding voltage, welding torch of geometric parameters such as. |
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