Patent ID: 8110075
Filing Date: 2012-02-07
Classification: B22F,C23C,Y10T

Abstract:
1. A method for making a cutting tool insert, comprising: preparing a substrate by milling, pressing and sintering a composition comprising: WC; 5.0-7.0 wt-% Co; 0.22-0.43 wt-% Cr; and wherein said substrate has a coercivity Hc of about 19-28 kA/m; and depositing a single layer of (Ti where I(hkl)=intensity of the (hkl) reflection, I n=number of reflections used in the calculation, (hkl) reflections used are: (111), (200), (220), utilizing arc evaporation of an alloyed, or Ti+Al composite cathode, wherein the cathode comprises about 25-50 at-% Ti, and a current about 50-200, the substrate bias of about −20V to −35V, a deposition temperature of about 400° C.-700° C. and grown in an Ar+N