Patent ID: 7422803
Filing Date: 2008-09-09
Classification: C23C,Y10T

Abstract:
1. Cutting tool insert comprising a substrate of cemented carbide, cermet or ceramic at least partially coated with a coating with a total thickness of from about 10 to about 40 μm of one or more wear resistant layers of which at least one layer is a MTCVD-Ti(C,N)-layer with a thickness of from about 3 to about 30 μm, said layer being composed of equiaxed grains with grain size of from about 50 to about 300 nm and having a length-to-width ratio (L/W)<3, said layer having the following composition expressed as (Ti x Al y X z )(C u O w N v ): x is from about 0.3 to about 0.8, y is from about 0.0 to about 0.2, z is from about 0.0 to about 0.2, u is from about 0.3 to about 0.9, w is from about 0.0 to 0.2 and v is from about 0.3 to about 0.6, X being selected of metals from groups 4 to 6, and exhibits, expressed in absolute values, a Full Width at Half Maximum (FWHM) of the 220 reflection of less than 0.4° measured using CuKα-radiation, and where at least one of y, z, and w is greater than zero.