Patent ID: 7056602
Filing Date: 2006-06-06
Classification: C23C

Abstract:
1. A cutting tool insert comprising a substrate and a coating wherein the coating comprises one or more layers of refractory compounds of which at least one layer comprises a precipitation hardened (Ti y Al x Me 1-x-y )N based layer, where Me is one of the elements Zr, Hf, V, Nb, Ta, Cr, Mo, W or Si, and wherein: x is between 0.55 and 0.80; a ratio, R=x/(x+y), is between 0.50 and 0.85; a sum of Ti and Al subscripts, S=x+y, is between 0.7 and less than 1.0; a ratio of the peak width, F a ratio between the area of the h-AlN (100) peak at approximately 33°2θ (=A(h-AlN) the layer has a single (Ti