Patent ID: 11931811
Assignee: TUNGALOY CORPORATION
Field: Surface technology, coating (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 16:
17. The coated cutting tool according to claim 2,
wherein the coating layer has an upper layer on a surface opposite to the substrate of the alternating laminate structure,
the upper layer contains a compound containing at least one element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Al, Si, and Y, and at least one element selected from the group consisting of C, N, O, and B,
an average thickness of the upper layer is 0.02 μm or more and 0.3 μm or less, and
a ratio of an average thickness of the upper layer occupying an average thickness of the entire coating layer is 25% or less.