在高纯铝中分别添加不同量的铝铈合金细化剂，考察了其铸态显微组织、力学性能的变化规律。
The high-purity aluminum was modified with different amount of Al-Ce grain refiners and the microstructures and mechanical properties of the modified aluminum were investigated.
轰击后样品表面的显微硬度与耐腐蚀性测试结果表明，显微组织的细化，改善了金属材料表面的物化性能。
The results of microhardness and corrosive resistance showed that mechanical properties of surface layer have been improved due to the refined grain.
指出合理的挤压铸造工艺可细化合金显微组织，提高铸件致密性，改善合金力学性能。
It is pointed out that the rational squeezing casting technology can refine microstructure and improve the component compactness as well as the mechanical properties of alloy.
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