Patent ID: 8864861

Claim:
A cutting tool insert for machining by chip removal, comprising: a body, either as a solid insert or attached to a backing body; and a hard and wear resistant PVD coating, wherein said body is a polycrystalline cubic boron nitride compact (PCBN) containing at least 30 vol % of cubic phase boron nitride (cBN) in a binder comprising at least one compound selected from nitrides, borides, oxides, carbides and carbonitrides of one or more of the elements belonging to the groups 4, 5 and 6 of the periodic table and Al, and said coating comprises a columnar and polycrystalline nanolaminated structure of alternating A and B layers, where layer A is (Ti 1-x Al x Me1 p )N a , with 0.3<x<0.95, 0.90<a<1.10, 0≦p<0.15, and Me1 is one or more of Zr, Y, V, Nb, Mo and W, layer B is (Ti 1-y-z Si y Me2 z )N b , with 0.05<y<0.25, 0≦z<0.4, 0.9<b<1.1 and Me2 is one or more of Y, V, Nb, Mo, W and Al, with a thickness of the nanolaminated structure between 0.5 and 10 μm, an average column width between 20 and 1000 nm, and an average individual thickness of A and B layers between 1 and 50 nm.