针对普通金属型铸造活塞力学性能不高的问题,将高频振动应用于ZL108铝合金活塞铸造。结果表明:高频振动能使ZL108铝合金活塞铸造凝固组织改善,α铝基体的尺寸细化,共晶硅分布和形貌有所改善,同时组织均匀性增加。起振时间对铸件凝固组织的影响效果最明显,振动幅度的影响比振动频率更大。 Aiming at the problem of low mechanical property of ordinary metal casting piston, high frequency vibration is applied to ZL108 aluminum alloy piston casting. The results show that the high frequency vibration can improve the solidification microstructure of ZL108 aluminum alloy piston casting, the size of α aluminum matrix is ​​refined, the distribution and morphology of eutectic silicon are improved and the homogeneity of microstructure is improved. The effect of the start-up time on the solidified structure of the casting is most obvious, and the influence of the vibration amplitude is greater than the vibration frequency.