本文研究了铁元素对Al—Si系活塞合金高温及室温机械性能的影响。随着铁含量增加,合金的高温短时抗拉强度增加,但室温抗拉强度下降。铁使合金的高温、室温、高温持久硬度及长期时效后硬度增加,使冲击韧性下降。 This paper studies the effect of iron on the mechanical properties of Al-Si-based piston alloys at high temperature and room temperature. With the increase of iron content, the high temperature short-term tensile strength of the alloy increases, but the tensile strength at room temperature decreases. Iron makes the alloy high temperature, room temperature, high temperature hardness and long-term hardness after aging increased, the impact toughness decreased.