# US 2019/0314899 A1 · Coated cutting tool > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0314899 A1 - Document ID: US20190314899A1 - Status: Published application - Kind: A1 - Application number: 16/313,957 - Filed: 2017-06-27 - Published: 2019-10-17 - Earliest claimed: 2016-07-01 - Assignees: Tungaloy Corporation - Applicants: Tungaloy Corporation - Inventors: Takaaki NAKAMURA - Web page: https://patentgrep.com/patent/US20190314899A1 ## CPC - B23B 27/14: Cutting tools of which the bits or tips {or cutting inserts} are of special material - B23B 27/148: {Composition of the cutting inserts} - B23B 51/00: Tools for drilling machines - B23C 5/16: characterised by physical features other than shape - B23C 5/20: with removable cutter bits or teeth {or cutting inserts} - C23C 16/36: Carbonitrides - C23C 16/40: Oxides - C23C 16/403: {of aluminium, magnesium or beryllium} - C23C 16/45523: {Pulsed gas flow or change of composition over time} - B23B 2224/32: Titanium carbide nitride (TiCN) - B23B 2228/10: Coatings - B23B: TURNING; BORING (arrangements for copying or controlling B23Q) - B23C: MILLING (broaching B23D; broach-milling in making gears B23F; arrangement for copying or controlling B23Q) - C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04) ## Abstract A coated cutting tool comprising a substrate and a coating layer formed on the substrate, wherein: the coating layer is laminated in order from the substrate side toward a surface side of the coating layer; and the coating layer comprises an upper layer and a lower layer which satisfy the following conditions that: “at least one of {422} planes of TiCN particles located closest to the surface in the lower layer and at least one of {006} planes of α-type Al2O3 particles located closest to the substrate in the upper layer and immediately above the TiCN particles are substantially parallel to each other, and at least one of {111} planes of the TiCN particles and at least one of {110} planes of the α-type Al2O3 particles are substantially parallel to each other”; and “at least one of {111} planes of TiCN particles located closest to the surface in the lower layer and at least one of {006} planes of α-type Al2O3 particles located closest to the substrate in the upper layer and immediately above the TiCN particles are substantially parallel to each other, and at least one of {422} planes of the TiCN particles and at least one of {110} planes of the α-type Al2O3 particles are substantially parallel to each other.” ## Claims ### Claim 1 A coated cutting tool comprising a substrate and a coating layer formed on the substrate, wherein: the coating layer comprises a lower layer containing TiCN and an upper layer containing α-type Al2O3, the lower layer and the upper layer being laminated in order from the substrate side toward a surface side of the coating layer; and the lower layer and the upper layer comprise a TiCN particle and an α-type Al2O3 particle which satisfy condition (I) below and a TiCN particle and an α-type Al2O3 particle which satisfy condition (II) below. Condition (I): At least one of {422} planes of TiCN particles located closest to the surface in the lower layer and at least one of {006} planes of α-type Al2O3 particles located closest to the substrate in the upper layer and immediately above the TiCN particles are substantially parallel to each other, and at least one of {111} planes of the TiCN particles and at least one of {110} planes of the α-type Al2O3 particles are substantially parallel to each other. Condition (II): At least one of {111} planes of TiCN particles located closest to the surface in the lower layer and at least one of {006} planes of α-type Al2O3 particles located closest to the substrate in the upper layer and immediately above the TiCN particles are substantially parallel to each other, and at least one of {422} planes of the TiCN particles and at least one of {110} planes of the α-type Al2O3 particles are substantially parallel to each other. ### Claim 2 (depends on 1) The coated cutting tool according to claim 1, wherein, based on a total number of TiCN particles located closest to the surface in the lower layer and α-type Al2O3 particles located closest to the substrate in the upper layer, a ratio of a total number of TiCN particles and α-type Al2O3 particles which satisfy condition (I) and TiCN particles and α-type Al2O3 particles which satisfy condition (II) is from 50% or more to 100% or less. ### Claim 3 (depends on 1) The coated cutting tool according to claim 1, wherein an average thickness of the upper layer is from 1 μm or more to 15 μm or less. ### Claim 4 (depends on 1) The coated cutting tool according to claim 1, wherein an average thickness of the lower layer is from 2 μm or more to 20 μm or less. ### Claim 5 (depends on 1) The coated cutting tool according to claim 1, wherein the coating layer comprises, between the lower layer and the upper layer, an intermediate layer containing a compound of at least one kind selected from the group consisting of a Ti carbide, a Ti nitride, a Ti oxide, a Ti carboxide, a Ti oxynitride and a Ti carboxynitride, and an average thickness of the intermediate layer is from 0.1 μm or more to 0.5 μm or less. ### Claim 6 (depends on 1) The coated cutting tool according to claim 1, wherein an average thickness of the coating layer is from 3 μm or more to 30 μm or less. ### Claim 7 (depends on 1) The coated cutting tool according to claim 1, wherein the substrate is a cemented carbide, cermet, ceramic or a cubic boron nitride sintered body. ### Claim 8 (depends on 2) The coated cutting tool according to claim 2, wherein an average thickness of the upper layer is from 1 μm or more to 15 μm or less. ### Claim 9 (depends on 3) The coated cutting tool according to claim 3, wherein an average thickness of the lower layer is from 2 μm or more to 20 μm or less. ### Claim 10 (depends on 2) The coated cutting tool according to claim 2, wherein the coating layer comprises, between the lower layer and the upper layer, an intermediate layer containing a compound of at least one kind selected from the group consisting of a Ti carbide, a Ti nitride, a Ti oxide, a Ti carboxide, a Ti oxynitride and a Ti carboxynitride, and an average thickness of the intermediate layer is from 0.1 μm or more to 0.5 μm or less. ### Claim 11 (depends on 3) The coated cutting tool according to claim 3, wherein the coating layer comprises, between the lower layer and the upper layer, an intermediate layer containing a compound of at least one kind selected from the group consisting of a Ti carbide, a Ti nitride, a Ti oxide, a Ti carboxide, a Ti oxynitride and a Ti carboxynitride, and an average thickness of the intermediate layer is from 0.1 μm or more to 0.5 μm or less. ### Claim 12 (depends on 4) The coated cutting tool according to claim 4, wherein the coating layer comprises, between the lower layer and the upper layer, an intermediate layer containing a compound of at least one kind selected from the group consisting of a Ti carbide, a Ti nitride, a Ti oxide, a Ti carboxide, a Ti oxynitride and a Ti carboxynitride, and an average thickness of the intermediate layer is from 0.1 μm or more to 0.5 μm or less. ### Claim 13 (depends on 2) The coated cutting tool according to claim 2, wherein an average thickness of the coating layer is from 3 μm or more to 30 μm or less. ### Claim 14 (depends on 3) The coated cutting tool according to claim 3, wherein an average thickness of the coating layer is from 3 μm or more to 30 μm or less. ### Claim 15 (depends on 4) The coated cutting tool according to claim 4, wherein an average thickness of the coating layer is from 3 μm or more to 30 μm or less. ### Claim 16 (depends on 5) The coated cutting tool according to claim 5, wherein an average thickness of the coating layer is from 3 μm or more to 30 μm or less. ### Claim 17 (depends on 1) The coated cutting tool according to claim 1, wherein the substrate is a cemented carbide, cermet, ceramic or a cubic boron nitride sintered body. ### Claim 18 (depends on 2) The coated cutting tool according to claim 2, wherein the substrate is a cemented carbide, cermet, ceramic or a cubic boron nitride sintered body. ### Claim 19 (depends on 3) The coated cutting tool according to claim 3, wherein the substrate is a cemented carbide, cermet, ceramic or a cubic boron nitride sintered body. ### Claim 20 (depends on 4) The coated cutting tool according to claim 4, wherein the substrate is a cemented carbide, cermet, ceramic or a cubic boron nitride sintered body.