Patent ID: 8852305

Claim:
A cutting tool insert for machining by chip removal, comprising: a body of a hard alloy of cemented carbide, cermet, ceramics, cubic boron nitride based material or high speed steel; and a coating deposited on the body by physical vapour deposition, said coating comprising a columnar and polycrystalline nanolaminated structure of alternating A and B layers where layer A is (Ti 1-x-p 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 or N, and where 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, N and Al, with a thickness of the nanolaminated structure between 0.5 and 20 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.