Patent ID: 8409696

Claim:
A cutting tool 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 hard and wear resistant coating, wherein said coating comprises a polycrystalline laminar, multilayered structure of metal nitride compounds, in a repetitive form . . . MeN/Ti 1-x Al x )N/MeN/(Ti 1-x Al x )N/MeN/(Ti 1-x Al x )N/MeN/(Ti 1-x Al x )N . . . of cubic structured (Ti 1-x Al x )N layers where 0.3<x<0.95 and cubic structured MeN layers where Me is one or more of the metal element Ti, Zr, Hf, V, Nb, Ta, Mo and Al with a repeat period, λ, that is essentially constant throughout the entire laminated structure having a total thickness between 0.5 and 20 μm, a repeat period, λ, of 5 nm≦λ<20 nm, and layer thickness relation of 1/10<(d MeN /d (Ti,Al)N )<1/3, where the thickness d MeN is larger than d MeN ≧1 nm.