| Abstract Scope |
Grain refiners are used for the aluminum DC casting process to easily refine the cast structure. On the other hand, high levels of TiB2 particles and other inclusions in the grain refiner cause clogging of the melt filter. Improvement of the grain refinement effectiveness is required to reduce the addition level of grain refiners. The grain refiner supplier AMG developed “TiBAl Advance”, which is high performance Al-3Ti-1B (mass%) grain refiner. TiBAl Advance is a selected grain refiner that has passed a special casting test. However, the reason why high grain refinement effectiveness is not clarified yet. In this work, the grain refinement effectiveness of TiBAl Advance was compared with conventional grain refiner. In addition, TiB2 particle size distributions, including agglomerates, were measured in each refiner, and applied to the new model for the grain size prediction to estimate the mechanism of the difference of grain refinement effectiveness. |