A novel preparing technique for producing high purity Al-5Ti-1B grain refiner was presented by using processes including alloying with electronic and magnetic stirring

rotational degassing and high efficient filter

based on the traditional process of complex halide salts with molten aluminum.The results show that the impurity contents have been obviously decreased

and purity of Al-5Ti-1B alloy is greatly increased by using the new high-cleanliness process.Compared with the traditional method of "complex halide salts with molten aluminum"

microstructural characterizations reveal that the intermetallic TiAl3 and TiB2 phases have small size of 5

3

0 μm and 0.37

1

.24 μm

respectively

become more homogeneous distribution in Al-5Ti-1B master alloys prepared by "high-cleanliness process"

which had met the requirements of refining treatment of high quality Al alloys.The refinement mechanism of the Al-5Ti-1B refiner was also discussed

which provided a theoretical basis and technical support for further improving the quality of Al-Ti-B grain refiner in industry.