Eco-friendly fabrication process of AlTiC grain refiner

In order to fabricate an aluminum grain refiners such as AlTiB and AlTiC, environmentally damaging fluoride-containing fumes induces an expensive emission control system. Furthermore, the problems associated with boride agglomeration in AlTiB refiner and expensive fabrication cost of AlTiC refiner have created a demand for boron-free and cheaper grain refiners. In the present study, Eco-friendly (K2TiF6-less) fabrication process of fading-less AlTiC refiner was investigated by an in-situ TiC formation through an melting of cheap Al-Ti master alloy in Graphite crucible and atomization of AlTiC melts producing AlTiC powders containing carbon with 250ppm. We aimed at evaluation of fading mechanism, then prevention of the fading at relative long holding time as well as substitution of AlTiB grain refiner for eco-friendly and cheaper cost.