Patent ID: 8455116
Filing Date: 2013-06-04
Classification: B22F,C04B,C22C,C23C,Y10T

Abstract:
1. Cemented carbide cutting tool insert comprising a substrate and a wear resistant coating wherein: the substrate comprises WC, from about 5.5 to about 8.5 wt-% Co and Cr such that the Cr/Co weight ratio is from about 0.08 to about 0.12, and also Ti and Ta in such amounts that the ratio of Me/Co=(at % Ti+at % Ta)/at % Co is less than or equal to about 0.014−(CW—Cr)*0.008 and higher than about 0.0005 and CW—Cr is from about 0.75 to about 0.95, whereby the CW—Cr is defined as