Analysis and countermeasures of casting defect mechanism in magnesium aluminum alloy
This study mainly focuses on the casting process and defect mechanism of magnesium-aluminum alloy.Through the investigation of surface defects in magnesium-aluminum alloy castings,it has been found that these defects,such as cracks and shrinkage porosity,are mainly caused by high pouring temperature,slow cooling rate,and insufficient crystallinity resulting in residual stress.Corresponding solutions to these issues have been proposed and experimentally validated.This paper first introduces the basic knowledge of magnesium-aluminum alloys,including their physical and chemical properties,microstructure,and mechanical properties.In the casting process of magnesium-aluminum alloys,the effects of pouring temperature,cooling rate,and crystallinity on defect formation mechanisms are discussed in detail.Based on the observed defects in actual production,effective solutions are proposed.
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