证明了真空热处理过程对用熔铸法重力浇注制备的优质石墨铝硅复合材料的性能有较好影响。通过与石墨包覆铜法和简单可靠的机械合金化法相比较， 证明经真空热处理过程制备的上述材料的高温强度达到１５０ ＭＰａ 以上， 力学性能、物理性能也较好， 是制取优质石墨铝硅复合材料必需可靠的手段， 该法还具有工艺简单可靠、成本低廉 It is proved that the vacuum heat treatment process has a good effect on the performance of high-quality graphite-Al-Si composites prepared by gravity casting with casting method. Compared with graphite coated copper method and simple and reliable mechanical alloying method, it is proved that the above materials prepared by vacuum heat treatment have high temperature strength of more than 150 MPa, good mechanical properties and physical properties, and are prepared from high quality graphite aluminum Silicon composite materials must be reliable means, the method also has a simple and reliable process, low cost