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利用铸造搅拌法制取了由Ａｌ２Ｏ３颗粒增强的Ａｌ－Ｓｉ合金复合材料。通过正文试验，探讨了Ａｌ２Ｏ３颗粒的尺寸、颗粒的体积分数与浇注温度对Ａｌ２Ｏ３颗粒－Ａｌ－Ｓｉ复合材料组织和性能的影响。结果表明：当Ａｌ２Ｏ３，颗粒尺寸为１－３ｍ、体积分数１５－２０％，浇注温度为８００℃时增强效果最佳，强度可提高２０％以上，磨损量可减少６０％－７０％，Ａｌ２Ｏ３颗粒能促进Ｓｉ相形核、有碎化共晶硅并使之细化的作用。
Al-Si alloy composite reinforced by Al2O3 particles was prepared by casting and stirring method. Through textual experiments, the effects of Al2O3 particle size, particle volume fraction and pouring temperature on microstructure and properties of Al2O3-Al2O3-Al2O3 composites were investigated. The results show that when Al2O3 is 1-3m, the volume fraction is 15-20% and the pouring temperature is 800 ℃, the reinforcement effect is the best, the strength can be increased more than 20% and the wear amount can be reduced by 60-70% Si can promote nucleation, crushing eutectic silicon and make it thinning effect.