Patent ID: 11919091
Assignee: P & S GLOBAL HOLDINGS LLC
Field: Surface technology, coating (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 5:
6. A cutting tool insert, comprising:
a. a carbide substrate with an average tungsten carbide grain size of 0.4 to 0.8 microns, a honing edge in the range of 10 and 35 microns, and a surface roughness of 0.5 to 1.5 micron;
b. a nanostructured coating deposited over the substrate, the nanostructured coating comprising
i. a first nanostructured layer deposited over the substrate; and
ii. a second nanostructured layer deposited over the first nanostructured layer;
iii. a third nanostructured layer deposited over the second nanostructured layer;
iv. a fourth nanostructured layer deposited over the third nanostructured layer;

c. a carbon enriched layer deposited over the fourth nanostructured layer wherein the carbon enriched layer comprises a carbon enriched layer of titanium carbonitride;
d. a non-nanostructured layer deposited over the carbon enriched layer wherein the non-nanostructured layer comprises an aluminum oxide layer with a surface roughness ranging from 0.05 to 0.5 microns;
e. a nanostructured-to-non-nanostructured interface at a face of the non-nanostructured layer in contact with the nanostructured layer, thereby forming a coated substrate.