对多元合金凝固过程的平衡溶质再分配系数进行了热力学描述,得出了其和二元合金溶质分配系数之间的关系。对于多元合金,其分配系数不仅仅是二元合金分配系数的线性组合,而且与各组元间的相互影响性较强。讨论了在非平衡凝固条件下对溶质再分配系数的处理,从热力学和动力学方面入手,讨论了溶质再分配系数随凝固速度变化的关系,而且还讨论了快速凝固过程对溶质再分配系数的影响。 The thermodynamic description of the equilibrium solute redistribution coefficient of the solidification process of the multi-alloy was obtained, and the relationship between the solute partition coefficient and the solute partition coefficient of the binary alloy was obtained. For multivariate alloys, the distribution coefficient is not only a linear combination of binary alloy distribution coefficient, but also interacts strongly with each component. The treatment of solute redistribution coefficients under non-equilibrium solidification conditions was discussed. The relationship between solute redistribution coefficients and solidification rate was discussed in terms of thermodynamics and kinetics. The effects of rapid solidification on solute redistribution coefficients influences.