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根据触变铸造固态合金的流变特性，将半固态合金在触变铸造充型过程的流动简化为均相等温层流流动，并在此基础上建立了连续方程、动量方程和守恒标量方程，开发了适用于半固态合金触变铸造充型过程的数值模拟系统。充型过程的计算机数值模拟，主要是确定充填过程中半固态合金的自由表面形貌的变化。本文采用守恒标量法，将自由表面视为内部界面，从而无需在自由表面处施加边界条件。为了验证本文开发的模拟系统的可靠性与适用性，根据半固态合金的特点，在自制的半固态合金触变成形装置上进行了半固态合金成形工艺的研究。数值模拟结果与实验充型结果基本相符。
According to the rheological properties of thixocasting solid state alloy, the flow of semi-solid alloy in thixoforming process is simplified as homogeneous laminar flow, and the continuous equation, momentum equation and conservation scalar equation are established. A numerical simulation system suitable for the filling process of semi-solid alloy thixoforming was developed. Computer numerical simulation of filling process is mainly to determine the change of free surface topography of semi-solid alloy during filling. In this paper, the conserved scalar method, the free surface as the internal interface, so no need to impose boundary conditions at the free surface. In order to verify the reliability and applicability of the simulation system developed in this paper, according to the characteristics of semi-solid alloy, semi-solid alloy forming process was studied on homemade semi-solid alloy thixoforming device. The results of numerical simulation are in good agreement with the experimental results.