Patent ID: 9464354
Filing Date: 2016-10-11
CPC Classification: C23C,C25D,Y10T

Claim Text:
1. Tool, consisting of: a substrate body made of hard metal, cermet, ceramic, steel or high-speed steel, optionally a single-layer or multi-layer wear protection coating deposited on the substrate body, and a multi-layer wear recognition coating comprising at least four individual layers arranged one over another, the multi-layer wear recognition coating deposited as the outermost layer over the substrate body or the wear protection coating and being produced by deposition of elemental metals, metal alloys or electrically conductive metal compounds by a PVD process, wherein at least one individual layer of the multi-layer wear recognition coating contains at least two different metals, the wear recognition coating comprises a region produced by anodic oxidation of the material of the wear recognition coating from the outer surface of the wear recognition coating to a depth of penetration which does not extend beyond the total thickness of the wear recognition coating, each individual layer of the multi-layer wear recognition coating exhibits a thickness in the range of from 0.5 nm to 1 μm, and the at least one individual layer of the multi-layer wear recognition coating containing at least two different metals exhibits at least two different phases prior to the anodic oxidation and in the regions of the wear recognition coating not oxidised anodically.