低钛铝合金的电解生产与晶粒细化

在电解低钛铝合金的工业化生产试验中，研究和对比了电解加钛和熔配加钛低钛铝合金的晶粒细化效果及其衰退行为。结果发现：电解质中添加少量TiO2对电解槽铝产量和电流效率影响较小，二者分别维持在1200kg和92％左右，钛的吸收率在95％以上所生产的合金钛含量稳定，晶粒细化效果明显，晶粒尺寸随钛含量的变化趋势与熔配加钛合金相同；钛含量在0．1％～0．2％范围内时，电解加Ti合金晶粒细化效果的抗退化能力比熔配加Ti合金的强。

Production and grain refinement of direct electrolytic low-titanium aluminium alloys

The industrial producing test of direct electrolytic low-titanium aluminium alloy was carried out. The grain refinement effect and the fading behaviour of the alloys produced by direct electrolytic method were investigated and compared with these of alloys produced by melt method. The results show that: under adding a small quantity of TiO_2 into electrolyte the changes of the production and the current efficiency of cell are trifling, which is about 1 200 kg and 92%, respectively; the absorptivity of titanium is above 95%; the titanium content of the alloy is stable and the effect of grain refinement is obvious; and the change of grain size of alloys has the same trend as that of alloys produced by melt method, but the fading resistance of direct electrolytic alloys is superior to that of alloys produced by melt method.