METHOD OF PREPARING AN Al-Ti-B GRAIN REFINER FOR ALUMINIUM-COMPRISING PRODUCTS, AND A METHOD OF CASTING ALUMINIUM PRODUCTS

摘要

The invention relates to a method of preparing an Al-Ti-B grain refiner for cast aluminium-comprising products. According to the invention the preparation is realized by mixing powders selected from the group comprising aluminium, titanium, boron, and alloys and intermetallic compounds thereof, compressing, heating in an inert environment until an exothermic reaction is initiated and cooling. It has been shown that when the grain refiner thus prepared is applied, the quality of cast products remains substantially constant even during lengthy casting processes. The invention also relates to a method of casting aluminium products.