采用Ce基混合稀土对ZnAl4合金进行了变质处理,研究了稀土对ZnAl4合金力学性能的影响规律。结果表明,加入0.5%的稀土能够细化ZnAl4合金的压铸态组织,合金共晶组织区域增加,稀土含量超过0.5%时,合金的综合力学性能下降。用0.5%稀土变质后的合金生产化油器,合金的压铸性能得到改善,零件的气密性得到大幅提高。 Ce-based mixed rare earth ZnAl4 alloy was modified to study the rare earth ZnAl4 alloy mechanical properties of the law. The results show that the addition of 0.5% rare earth can refine the ZnAl4 alloy die-casting microstructure, alloy eutectic microstructure increases, the rare earth content of more than 0.5%, the alloy mechanical properties decreased. With 0.5% rare earth metamorphic alloy carburetor production, the alloy die-casting performance has been improved, parts of the airtightness has been greatly improved.