研究了复合Zr盐添加温度及保温时间对Mg-1%Y合金凝固组织的影响。结果表明:760℃添加0.31%Zr保温20 min后实验合金的细化效果最好,其平均晶粒尺寸可由原来的4100μm降至105μm。研究还表明:Zr盐的加入也在镁熔体中引入了一些Zr的氧化物,这是降低Zr收得率的原因,同时也增加了熔体净化的难度。 The effects of the addition temperature and holding time of composite Zr salt on the solidification microstructure of Mg-1% Y alloy were studied. The results show that the refinement of the experimental alloy is the best with the addition of 0.31% Zr at 760 ℃ for 20 min, and the average grain size can be reduced from 4100μm to 105μm. The study also shows that the addition of Zr salts also introduces some Zr oxides into the magnesium melt, which is responsible for the reduction of Zr yield and also increases the difficulty of melt purification.