重点探讨了一种制备 Si C颗粒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。同时与粉末冶金法制备的组织作了比较。结果表明 ,采用粉末预制块重熔稀释、铝液中加活性元素 (Mg)、适当提高铝液温度和机械搅拌等方法有效地改善了 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 for preparing Si C particles reinforced aluminum matrix composites is discussed, that is, the powder preform remelting dilution method. The use of common equipment to explore the preparation process, analysis of the microstructure. At the same time with the powder metallurgy prepared by the organization made a comparison. The results show that the wettability of Si C particles and aluminum matrix is ​​effectively improved by the remelting dilution of powder preform, the addition of active elements (Mg) in molten aluminum, the appropriate increase of liquid temperature and the mechanical stirring, which are more satisfactory Si Cp / Al composites.