Patent ID: 6799626
Filing Date: 2004-10-05
Classification: B22C,B22D,C22C

Abstract:
A method of making cast shapes of a metallic alloy, comprising the steps of:melting the alloy under vacuum or partial pressure of inert gas; pouring the alloy into a mold with a cavity, wherein the mold is made of machined graphite, wherein the graphite has been isostatically or vibrationally molded and has ultra fine isotropic grains having a particle size in the range of 3 to 40 microns, a density between 1.65 and 1.9 grams/cc, flexural strength between 5,500 and 20,000 psi, compressive strength between 9,000 and 35,000 psi, and porosity below 15%; solidifying the melted alloy into a solid body taking the shape of the mold cavity.