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对共晶铝硅合金进行了Sr、RE以及P变质处理的研究。结果表明，锶变质处理后达到最佳变质效果有一定的时间，本实验为90min，其后又有变质衰退现象；稀土是一种良好的变质剂，但Sr、RE复合变质同其单一变质相比，效果差别不明显；P变质对共晶组织也有明显的影响，它可使共晶点左移，从而在共晶成分时也可析出初晶硅，使共晶硅的数量减少，同时共晶硅较为粗大。
The eutectic Al-Si alloy was studied for Sr, RE and P modification. The results show that strontium metamorphism treatment to achieve the best metamorphism for a certain period of time, the experiment was 90min, followed by metamorphism decline; rare earth is a good modifier, but Sr, RE metamorphism with its single metamorphic phase Than the effect is not obvious; P metamorphism also have a significant impact on the organization, it can make the eutectic point to the left, so that eutectic composition can also precipitate primary silicon, eutectic silicon to reduce the number of the same time Crystal silicon is more coarse.