Patent ID: 6799627
Filing Date: 2004-10-05
Classification: B22C,B22D

Abstract:
A method of making cast shapes of a metallic alloy, comprising the steps of:melting the alloy to form a melt under vacuum or partial pressure of inert gas; pouring the melt of the alloy into a cavity of a composite mold comprising a substrate of isotropic graphite having a mold cavity, wherein the surface of the mold cavity is coated with a titanium carbide coating with a thickness from 2 to 500 microns; and solidifying the melted alloy into a solid body taking the shape of the mold cavity, wherein the isotropic graphite which constitutes the substrate of the mold has a density between 1.77 and 1.9 grams/cc and compressive strength between 17,000 and 35,000 psi.