Grain refinement of hypoeutectic Al-Si alloy prepared with ELTA by Al-4B master alloy
(1.河南省郑州市教育部，郑州大学物理系，材料物理重点实验室
2.Department of Physics, Laboratory of Materials Physics of Ministry of Education,Zhengzhou University, Zhengzhou 450052, China)
2.Department of Physics, Laboratory of Materials Physics of Ministry of Education,Zhengzhou University, Zhengzhou 450052, China)
Abstract: Electrolytic low-titanium aluminum (ELTA) was produced by adding TiO2 powder to an industrial aluminum electrolyzer. The grain refining effect of Al-4B master alloy in the hypoeutectic Al-Si alloy prepared by using ELTA was investigated, and compared with those of Al-5Ti, Al-5Ti-1B and Al-4B master alloys in the similar alloy prepared by using pure Al. The results indicate that when Al-4B is added to the melt of the alloy prepared by using ELTA in terms of the Ti/B mass ratio of 5？1, the grain refining effect is better than those of Al-5Ti, Al-5Ti-1B and Al-4B master alloys. Thus, using Al-4B to refine the grain of Al-Si alloys prepared by using ELTA will possibly become a feasible way of obtaining Al-Si alloy with homogeneous and fine microstructure.
Key words: electrolytic low-titanium aluminum (ELTA); grain refining; hypoeutectic Al-Si alloy