探讨了一种制备 Si C颗料增强铝基复合材料的新的工艺方法 ,即粉末预制块重熔稀释法。利用普通设备 ,探索了制备工艺过程 ,分析了金相组织。结果表明 ,采用粉末预制块 ,重熔稀释 ,Al液中加活性元素 Mg,适当提高铝液温度和增加机械搅拌力度等 ,有效地改善了 Si C颗粒与铝基体的润湿性。制备了较为满意的 Si Cp/Al复合材料 A new process method for preparing Si C particles reinforced aluminum matrix composites is discussed, that is, powder preform remelting dilution method. The use of common equipment to explore the preparation process, analysis of the microstructure. The results show that the wettability of Si C particles and aluminum matrix can be effectively improved by using powder preform, remelting dilution, adding active element Mg in Al liquid, appropriately increasing the temperature of liquid aluminum and increasing mechanical stirring. The more satisfactory Si Cp / Al composites were prepared