研究了石墨与硅之比对石墨铝硅复合材料综合性能的影响．解决了石墨颗粒直接加入铝硅熔体中的难点，并基本解决了石墨加入的均匀性问题．研究表明：石墨与硅生成一定量的ＳｉＣ，对提高石墨铝硅的高温抗拉强度十分有利；石墨与铝生成Ａｌ４Ｃ３有利于石墨在铝硅熔体中的均匀分布；生成Ａｌ４Ｃ３的量不宜过多，不能给石墨与硅生成碳化硅的比例带来影响．否则，会引起材料的性能下降 The effect of graphite to silicon ratio on the properties of graphite-Al-Si composites was investigated. Solve the graphite particles directly into the aluminum-silicon melt difficult, and basically solved the problem of the uniformity of graphite added. The results show that graphite and silicon generate a certain amount of SiC, which is very beneficial to improve the tensile strength of graphite-aluminum-silicon at high temperature. The formation of Al4C3 by graphite and aluminum is beneficial to the uniform distribution of graphite in Al-Si melt. The amount of Al4C3 And can not affect the ratio of graphite to silicon to silicon carbide. Otherwise, it will cause the performance of the material to drop