# US 12,005,508 B2 · Cutting tool > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,005,508 B2 - Document ID: US12005508B2 - Status: Granted - Kind: B2 - Application number: 18/033,357 - Filed: 2022-09-22 - Published: 2024-03-28 - Granted: 2024-06-11 - Earliest claimed: 2022-09-22 - Assignees: Sumitomo Electric Industries, Ltd. - Applicants: Sumitomo Electric Industries, Ltd. - Inventors: Haruyo Fukui; Nozomi Tsukihara; Anongsack Paseuth; Toshihiro Tabata - Web page: https://patentgrep.com/patent/US12005508B2 ## CPC - B23B 27/14: Cutting tools of which the bits or tips {or cutting inserts} are of special material - C23C 28/42: {characterized by the composition of the alternating layers} - C23C 14/0021: {Reactive sputtering or evaporation} - C23C 14/0641: {Nitrides (C23C14/0617 takes precedence)} - C23C 14/0664: {Carbonitrides} - C23C 14/325: {Electric arc evaporation} - C23C 28/042: {including a refractory ceramic layer, e.g. refractory metal oxides, ZrO2, rare earth oxides} - C23C 28/044: {coatings specially adapted for cutting tools or wear applications} - C23C 28/44: {characterized by a measurable physical property of the alternating layer or system, e.g. thickness, density, hardness} - C23C 30/005: {on hard metal substrates} - E21B 10/46: characterised by wear resisting parts, e.g. diamond inserts - E21B 10/567: with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts - E21B 10/5676: {having a cutting face with different segments, e.g. mosaic-type inserts} - B23B 2224/32: Titanium carbide nitride (TiCN) - B23B 2224/36: Titanium nitride - B23B 2228/105: with specified thickness - B23B: TURNING; BORING (arrangements 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) - E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS ## Abstract A cutting tool is a cutting tool comprising a substrate and a coating film disposed on the substrate, in which the coating film includes a first layer, the first layer is composed of an alternate layer where a first unit layer and a second unit layer are alternately stacked, the first unit layer is composed of Ti1-a-bAlaCebN, a is between greater than or equal to 0.350 and equal to or less than 0.650, b is between greater than or equal to 0.001 and equal to or less than 0.100, the second unit layer is composed of TicSi1-cN, and c is between greater than or equal to 0.20 and equal to or less than 0.99. ## Claims ### Claim 1 A cutting tool comprising a substrate and a coating film disposed on the substrate, wherein the coating film includes a first layer, the first layer is composed of an alternate layer where a first unit layer and a second unit layer are alternately stacked, the first unit layer is composed of Ti1-a-bAlaCebN, a is between greater than or equal to 0.350 and equal to or less than 0.650, b is between greater than or equal to 0.001 and equal to or less than 0.100, the second unit layer is composed of TicSi1-cN, and c is between greater than or equal to 0.20 and equal to or less than 0.99. ### Claim 2 (depends on 1) The cutting tool according to claim 1, wherein, in the first unit layer and the second unit layer adjacent to the first unit layer, a ratio λ1/λ2 of a thickness λ1 of the first unit layer to a thickness t2 of the second unit layer is between greater than or equal to 1 and equal to or less than 5. ### Claim 3 (depends on 1) The cutting tool according to claim 1, wherein an average thickness of the first unit layer is between greater than or equal to 0.002 μm and equal to or less than 0.2 μm, and an average thickness of the second unit layer is between greater than or equal to 0.002 μm and equal to or less than 0.2 μm. ### Claim 4 (depends on 1) The cutting tool according to claim 1, wherein the coating film further includes a second layer disposed between the substrate and the first layer, and a composition of the second layer is the same as a composition of the first unit layer or a composition of the second unit layer. ### Claim 5 (depends on 4) The cutting tool according to claim 4, wherein the composition of the second layer is the same as the composition of the first unit layer, and a thickness of the second layer is larger than a thickness of the first unit layer. ### Claim 6 (depends on 4) The cutting tool according to claim 4, wherein the composition of the second layer is the same as the composition of the second unit layer, and a thickness of the second layer is larger than a thickness of the second unit layer. ### Claim 7 (depends on 1) The cutting tool according to claim 1, wherein the coating film further includes a third layer provided on the first layer opposite to the substrate, and the third layer is composed of TiAlCeCN. ### Claim 8 A cutting tool comprising a substrate and a coating film disposed on the substrate, wherein the coating film includes a first A layer, the first A layer is composed of an alternate layer where a first unit layer and a third unit layer are alternately stacked, the first unit layer is composed of Ti1-a-bAlaCebN, a is between greater than or equal to 0.350 and equal to orless than 0.650, b is between greater than or equal to 0.001 and equal to or less than 0.100, the third unit layer is composed of TidSi1-d-eMeN, M is boron, d is between greater than or equal to 0.20 and equal to or less than 0.99, and e is between meter than 0 and equal to or less than 0.05. ### Claim 9 (depends on 8) The cutting tool according to claim 8, wherein, in the first unit layer and the third unit layer adjacent to the first unit layer, a ratio λ1/λ3 of a thickness λ1 of the first unit layer to a thickness t3 of the third unit layer is between greater than or equal to 1 and equal to or less than 5. ### Claim 10 (depends on 8) The cutting tool according to claim 8, wherein an average thickness of the first unit layer is between greater than or equal to 0.002 μm and equal to or less than 0.2 μm, and an average thickness of the third unit layer is between greater than or equal to 0.002 μm and equal to or less than 0.2 μm. ### Claim 11 (depends on 8) The cutting tool according to claim 8, wherein the coating film further includes a second layer disposed between the substrate and the first A layer, and a composition of the second layer is the same as a composition of the first unit layer or a composition of the third unit layer. ### Claim 12 (depends on 11) The cutting tool according to claim 11, wherein the composition of the second layer is the same as the composition of the first unit layer, and a thickness of the second layer is larger than a thickness of the first unit layer. ### Claim 13 (depends on 11) The cutting tool according to claim 11, wherein the composition of the second layer is the same as the composition of the third unit layer, and a thickness of the second layer is larger than a thickness of the third unit layer. ### Claim 14 (depends on 8) The cutting tool according to claim 8, wherein the coating film further includes a third layer provided on the first A layer opposite to the substrate, and the third layer is composed of TiAlCeCN.