为了定量地描述多元合金的实际形核过程，引入实验参数,建立了工业多元合金凝固过程中的经验形核模型, 该模型把形核率与最终晶粒密度联系起来。该模型能根据设计的参考试样的实验结果计算工业合金凝固过程中单位体积熔体中有效异质核心表面Sv和熔体中有效异质核心润湿角因子f， 进而分析实际铸件的形核特性。利用所建立的经验形核模型，针对Al-7Si合金和Al-7Si-0.55Mg合金，计算了一定熔炼条件下的形核参数。
An experiential nucleation model in solidification processes of the industrial alloys was established by introducing the experimental parameters. This model not only described nucleation rate of the alloys quantitatively, but also linked the nucleation rates with the final grain sizes. The surface area of effective catalysts per unit volume melt and the contact angle of effective catalysts in the melt in solidification processes were calculated with the model and the nucleation characteristic of the casting was analyzed. The model was also used to estimate the nucleation parameters of Al-7Si alloy and Al-7Si-0.55Mg alloy in the definite melting condition.
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