Patent ID: 7293599
Filing Date: 2007-11-13
Classification: B22C,B22D

Abstract:
1. A method of investment casting bulk solidifying amorphous alloys comprising: providing an investment mold having at least one cavity; providing a feedstock of bulk solidifying amorphous alloy, wherein the bulk solidifying amorphous alloy has a ΔTsc of more than 60° C.; heating the feedstock of the bulk solidifying amorphous alloy to a temperature above the melting temperature of the bulk solidifying amorphous alloy to form a molten bulk solidifying amorphous alloy; introducing a sufficient quantity of the molten bulk solidifying amorphous alloy into the cavity of the investment mold to fill the cavity of the investment mold with molten bulk solidifying amorphous alloy, wherein during the introduction the investment mold is heated to a temperature around the glass transition temperature of the bulk solidifying amorphous alloy; quenching the filled investment mold in a quenching medium to form a cast component of the bulk solidifying amorphous alloy, and wherein the filled investment mold is kept in contact with the quenching medium until the entirety of the cast component is cooled to below the glass transition temperature of the bulk solidifying amorphous alloy; separating the investment mold from the cast component; and wherein the bulk-solidifying amorphous alloy has at least one crystallization step, the at least one crystallization step being defined by a temperature range (ΔT