Patent ID: 7989060

Claim:
A cutting tool insert, comprising: a body comprising a hard alloy selected from the group consisting of cemented carbide, cermet, ceramics, cubic boron nitride based material, and high speed steel; and a hard and wear resistant coating applied on said body; wherein said coating comprises at least one (Al,Cr) 2 O 3 layer; wherein said (Al,Cr) 2 O 3 layer has a corundum phase crystalline structure and a structure and a composition (Al 1-y Cr y ) 2 O 3 with about 0.5≦y≦about 0.7 with a thickness of about 0.5 μm to about 10 μm and a fiber texture, rotational symmetry, in the direction of the coated surface normal with an inclination angle, φ, of the basal planes relative to the coated surface normal is about 0°<φ<about 20° or the inclination angle, φ, for the highest peak in the pole plot is about 0°<φ<about 20°.