Patent ID: 6217632
Filing Date: 2001-04-17
Classification: C22C

Abstract:
An improved method for treating molten aluminum for solidifying into cast products wherein the molten aluminum is subject to a metal treatment, the improved method comprising forming grain refiner in the molten aluminum, the method comprising:(a) providing a molten aluminum body;(b) providing at least one metal selected from the group consisting of titanium, zirconium, vanadium, molybdenum, manganese, silicon, tungsten, tantalum, niobium and beryllium and mixtures thereof in said molten aluminum body;(c) introducing to said molten aluminum body, a material reactive with at least one of said metals selected from the group consisting of titanium, zirconium, vanadium, molybdenum, manganese, silicon, tungsten, tantalum, niobium and beryllium, said material being in gaseous form at molten aluminum temperature and comprising at least one component of the group consisting of boron, carbon, sulfur, nitrogen and phosphorus, said material and at least one of said metal from said group forming grain refining nuclei in the aluminum body; and(d) solidifying at least a portion of said molten aluminum body into a grain refined, cast product.