新型过共晶铝硅合金的研究康嘉华（五二研究所）１引言过共晶铝硅合金具有密度小、热强度高、线膨胀系数小、耐磨性能好等优点，这对于发动机活塞来说是较理想的材料。国外应用已相当普遍，国内也已开始研究。据此，我们研制了新型过共晶铝硅合金，其性能指标要求如下：Ｔ... New Hypereutectic Al-Si Alloys 1 Introduction Hypereutectic Al-Si alloys have the advantages of low density, high thermal strength, low coefficient of linear expansion, good wear resistance, which for the engine piston Is the ideal material. Foreign applications have been quite common, the domestic has begun to study. Accordingly, we developed a new hypereutectic Al-Si alloy, the performance requirements are as follows: T ...