研究了添加微量La、Cr对G01压铸铝合金组织和性能的影响,测试了该合金的抗拉强度、硬度和冲击韧度,用光学显微镜观察组织,进而分析了添加La、Cr后力学性能的变化规律与金相组织的变化。结果表明:添加La、Cr后合金组织晶粒明显细化;当La含量为0.15%,Cr含量为0.2%时,合金的综合力学性能最好。 The effects of addition of trace amount of La and Cr on the microstructure and properties of G01 die-cast aluminum alloy were investigated. The tensile strength, hardness and impact toughness of the alloy were measured. The microstructure of the alloy was observed by optical microscope. Then the mechanical properties Variations and changes of microstructure. The results show that the grain size of the alloy is obviously refined when La and Cr are added. When the content of La is 0.15% and the content of Cr is 0.2%, the alloy has the best mechanical properties.