Patent ID: 8293359

Claim:
A multilayer CVD coating, comprising: at least one layer consisting of a metallic hard material layer X selected from the group consisting of nitrides, carbides, carbonitrides, carbooxynitrides of one or more elements of the group consisting of Ti, Al, Hf, and Zr, and having a thickness of from 10 nm to 90 nm; at least one layer consisting of a boron-doped metallic hard material layer Y selected from the group consisting of nitrides, carbides, carbonitrides, carbooxynitrides of one or more elements of the group consisting of Ti, Al, Hf, and Zr, having a boron content is from 0.005 to 5 atom % and a thickness from 10 nm to 90 nm; at least one said layer X adjoining a layer Y; and the coating being a CVD coating and having a thickness of between 0.5 μm and 16 μm.