本文介绍使用单一稀土和稀土与去气剂混合物对铅合金(ZL104)处理的两种试验,测定其对铝合金的气孔率、金相组织、铸造性能和机械性能的影响程度。结果表明:(1)稀土能降低铝合金的气孔率;(2)经稀土处理的铝合金其铸造性能和机械性能均高于其他精变剂的处理效果;(3)金相组织细化;(4)找出了使用单一稀土处理铝合金、稀土和去气剂混合物处理铝合金时所获得的理想工艺参数的最佳留存量。 This paper presents two tests for the treatment of lead alloy (ZL104) with a single rare earth and a mixture of rare earth and degassing agent to determine their effect on the porosity, microstructure, casting properties and mechanical properties of the aluminum alloy. The results show that: (1) rare earth can reduce the porosity of aluminum alloy; (2) the casting performance and mechanical properties of rare earth treated aluminum alloy are higher than those of other fine chemicals; (3) microstructure refinement; (4) The optimal retention of the ideal process parameters obtained when the aluminum alloy is treated with a single rare earth alloy, rare earth and degassing agent mixture is found out.