Patent ID: 9180522
Filing Date: 2015-11-10
Classification: B23B,C23C,Y10T

Abstract:
1. A cutting tool insert for machining by chip removal comprising a body based on a material selected from the group consisting of a hard alloy of cemented carbide, cermet, ceramics, polycrystalline-diamond and cubic boron nitride; and a hard and wear resistant coating deposited onto said body, said hard and wear resistant coating comprising least one layer, wherein said layer is a columnar NaCl-structured (Ti c Al a Cr b Me d ) (C z O y N x ) with a thickness between 1.5 and 10 μm, a compressive stress level of −6 GPa<σ<−0.5 GPa, a nanohardness >25 GPa with an average columnar width of <1μm and where Me is one or more of the elements: Zr, V, Nb, Ta, Mo, or W and 0.45<a <0.55 b+d>0.20, 0.05<c<b+d, 0≦d<0.25, 0.75<x<1.05, 0≦y<0.25, and 0≦z≦0.25.