# US 12,005,509 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 12,005,509 B2 - Document ID: US12005509B2 - Status: Granted - Kind: B2 - Application number: 18/039,974 - Filed: 2022-10-14 - Published: 2024-04-18 - Granted: 2024-06-11 - Earliest claimed: 2022-10-14 - 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/US12005509B2 ## 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 14/024: {Deposition of sublayers, e.g. to promote adhesion of the coating (C23C14/027 takes precedence)} - C23C 14/06: characterised by the coating material ({C23C14/0021} , C23C14/04 take precedence) - C23C 14/0641: {Nitrides (C23C14/0617 takes precedence)} - C23C 14/0664: {Carbonitrides} - C23C 14/325: {Electric arc evaporation} - C23C 14/34: Sputtering - 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} - 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) ## 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 AlaCrl-a-bCebN, a is 0.400 or more and 0.800 of less, b is 0.100 or less, the second unit layer is composed of TicSil-cN, and c is 0.200 or more and 0.990 or less. ## 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 AlaCrl-a-bCebN, a is 0.400 or more and 0.800 or less, b is 0.001 or more and 0.100 or less, the second unit layer is composed of TicSil-cN, c is 0.200 or more and 0.990 or less, and 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 λ2 of the second unit layer is 1.5 or more and 5.0 or less. ### Claim 2 (depends on 1) The cutting tool according to claim 1, wherein an average thickness of the first unit layer is 0.002 μm or more and 0.2 μm or less, and an average thickness of the second unit layer is 0.002 μm or more and 0.2 μm or less. ### Claim 3 (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 4 (depends on 3) The cutting tool according to claim 3, 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 5 (depends on 3) The cutting tool according to claim 3, 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 6 (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 AlCrCeCN. ### Claim 7 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 AlaCrl-a-bCebN, a is 0.400 or more and 0.800 or less, b is 0.001 or more and 0.100 or less, the third unit layer is composed of TidSil-d-cBcN, d is 0.200 or more and 0.990 or less, e is more than 0 and 0.05 or less, and 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 λ3 of the third unit layer is 1.5 or more and 5.0 or less. ### Claim 8 (depends on 7) The cutting tool according to claim 7, wherein an average thickness of the first unit layer is 0.002 μm or more and 0.2 μm or less, and an average thickness of the third unit layer is 0.002 μm or more and 0.2 μm or less. ### Claim 9 (depends on 7) The cutting tool according to claim 7, 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 10 (depends on 9) The cutting tool according to claim 9, 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 11 (depends on 9) The cutting tool according to claim 9, 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 12 (depends on 7) The cutting tool according to claim 7, 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 AlCrCeCN.