Patent ID: 7083868
Filing Date: 2006-08-01
Classification: C23C

Abstract:
1. A cutting tool insert comprising a substrate and a coating wherein the coating comprising one or more layers of refractory compounds of which at least one layer comprises a composite structured (Ti y Al x Me 1−x−y )N layer, where Me is one of the elements Zr, Hf, V, Nb, Ta, Cr, Mo, W or Si, and wherein: x is between 0.60 and 0.80; a ratio, R=x/(x+y), is between 0.60 and 0.85; a sum of Ti and Al subscripts, S=x+y, is between 0.7 and less than 1.0; co-existence of crystalline hexagonal h-AlN and cubic c-(Ti a Full Width Half Maximum value of the c-(Ti