本文通过光学金相、扫描电镜观察、微区成分分析和显微硬度测定,较系统地研究了铝合金压铸件中的硬质点,以及压铸件较硬区域中各种非金属夹杂物和金属杂质相的形貌和本质,分析讨论了它们的来源和产生的原因,提出了防止的措施。经在生产实践中验证,取得了良好的效果。 In this paper, through the optical metallography, scanning electron microscopy, micro-composition analysis and microhardness determination, the hard point in the aluminum die-casting and the non-metallic inclusions and metal The morphology and essence of impurity phases are analyzed, their origin and causes are analyzed and discussed, and measures to prevent them are put forward. After verified in the production practice, and achieved good results.