为了进一步提高过共晶Al-Si合金的耐磨性,向含硅13%~17%的铝硅合金中加入3%~5%Cu和0.2%~0.6%Sr,使该合金在电磁搅拌下凝固,研究了Cu、Sr对合金组织及耐磨性的影响。结果表明:随Al-Si合金Cu、Sr含量的增加,合金的耐磨性呈现先增大后减小的趋势;当合金中Si由13%提高至17%时,该合金的耐磨性提高;当合金中Si、Cu和Sr含量分别为17%、4.0%、0.4%时,该合金的耐磨性最好。 In order to further improve the wear resistance of the hypereutectic Al-Si alloy, 3% -5% Cu and 0.2% -0.6% Sr are added to the Al-Si alloy containing 13% -17% of silicon to make the alloy under electromagnetic stirring The effects of Cu and Sr on the microstructure and wear resistance of the alloy were studied. The results show that the wear resistance of the alloy first increases and then decreases with the increase of the content of Cu and Sr in the Al-Si alloy. When the content of Si in the alloy increases from 13% to 17%, the wear resistance of the alloy increases When the contents of Si, Cu and Sr in the alloy were 17%, 4.0% and 0.4% respectively, the wear resistance of the alloy was the best.