Patent ID: 9447491
Filing Date: 2016-09-20
CPC Classification: B23C,C23C,Y10T

Claim Text:
1. A coated cutting tool comprising a substrate and a coating on the substrate, wherein said coating comprises a multilayer structure, whereby said multilayer structure comprises: alternating layers A and B forming the sequence A/B/A/B/A . . . with an individual layer thickness of layer A and layer B of 1-30 nm, whereby layer A consists of Zr1−xAlxN, where 0<x<1, and layer B consists of TiN; and in an area being used in a cutting operation the multilayer structure consists of alternating layers A and B and an intermediate layer C between said alternating layers A and B forming the sequence A/C/B/C/A/C/B . . . with an individual layer thickness of layer A and layer B of 1-30 nm, whereby layer A consists of Zr1−xAlxN, where 0<x<1, and layer B consists of TiN and whereby layer C comprises one or more metal elements from each of layers A and B and is of different composition and structure than layers A and B.