基于有限元和元胞自动机法相结合的耦合CA-FE模型,以汽车工业常用的铸造Al-10Si为研究对象,研究了铸模材质、铸模厚度和形核参数对合金凝固组织的影响。结果表明,使用冷却能力更强的铸模或者增大铸模厚度都可以使凝固组织中柱状晶比例增大,当使用冷却能力差的硅砂模时,凝固组织中全为等轴晶组织。 Based on the coupled CA-FE model based on the finite element method and the cellular automaton method, the casting Al-10Si, which is commonly used in the automobile industry, was taken as the research object to study the effect of the mold material, mold thickness and nucleation parameters on the solidified microstructure of the alloy. The results show that the proportion of columnar crystals in the solidified structure can be increased by using the mold with stronger cooling capacity or increasing the thickness of the mold. When using the silicon sand mold with poor cooling ability, the equiaxed grains are all solidified in the solidified structure.