复合Zr盐对Mg-1%Y合金凝固组织的影响

Effect of composite Zr salt on solidification microstructure in Mg-1%Y alloy

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。

Effect of composite Zr salt addition temperature and holding time on solidification structure in Mg-1% Y was investigated. The results show that the refining grain size in the alloy is obtained when the temperature is 760 ℃ , adding 0.31% Zr and holding time for 20 rain, and the average grain size can be reduced from 4100 μm to 105 μm. The results also show that some Zr oxides in the alloy are brought after adding composite Zr salt, which is the reason of reducing Zr yield, and therefore the melt purification of the alloy is more different at the same time.