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研究了铝合金压铸件中的硬质点及其中的非金属夹杂物 ,测定了它们的化学成分和显微硬度 ,并分析了它们的来源 ,提出了防止的措施
The hard points and the non-metallic inclusions in die-cast aluminum alloy parts were studied, their chemical compositions and microhardness were measured, their origin was analyzed and measures to prevent them were put forward