本文介绍了一种表面复合材料铸渗技术的直接差分模拟方法。根据铸件凝固的模数法则建立简化的凝固模型 ,采用直接差分法 (DFDM )对铸渗凝固过程进行数值模拟。给出了各区域和边界的温度计算式 ,实例的计算和实测结果基本吻合。本方法可用于铸渗工艺设计中的技术参数预选 In this paper, a direct differential simulation method of surface composite infiltration technology is introduced. A simplified solidification model was established according to the modulus rule of casting solidification. The direct difference method (DFDM) was used to simulate the process of casting infiltration solidification. The temperature calculation formulas are given for all regions and boundaries. The calculated results are in good agreement with the measured ones. The method can be used for preselection of technical parameters in the design of infiltration and infiltration process