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本文详述了活塞用铝-石墨复合材料的主要性能。包括:主要的机械性能及若干物理性能。测定结果表明,复合材料的机械性能随石墨加入量的增加而降低,但活塞所要求的高温抗拉强度下降幅度较小;复合材料的热膨胀系数比目前使用的活塞材料要低,耐磨性明显优于目前使用的活塞合金。。复合材料的导热性与基体合金相比相差不大。综合这些数据可以确定,含石墨3—6 wt%的铝-石墨复合材料是制造发动机活塞的一种理想材料。
This article details the main properties of aluminum-graphite composites for pistons. Including: The main mechanical properties and a number of physical properties. The results show that the mechanical properties of the composites decrease with the increase of graphite loading, but the decrease of the tensile strength at high temperature required by the piston is smaller. The thermal expansion coefficient of the composites is lower than that of the currently used piston materials and the wear resistance is obvious Better than currently used piston alloys. . The thermal conductivity of composite materials and the base alloy or less. Based on these data, it can be determined that 3-6 wt% graphitic aluminum-graphite composites are an ideal material for engine pistons.