# US 11,998,991 B2 · Coated tool and cutting tool > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,998,991 B2 - Document ID: US11998991B2 - Status: Granted - Kind: B2 - Application number: 17/273,310 - Filed: 2019-09-03 - Published: 2021-08-12 - Granted: 2024-06-04 - Earliest claimed: 2018-09-05 - Assignees: KYOCERA Corporation - Applicants: Kyocera Corporation - Inventors: Tadashi Katsuma - Web page: https://patentgrep.com/patent/US11998991B2 ## CPC - B23B 27/14: Cutting tools of which the bits or tips {or cutting inserts} are of special material - C23C 16/36: Carbonitrides - C23C 16/403: {of aluminium, magnesium or beryllium} - C23C 28/04: only coatings of inorganic non-metallic material - C23C 28/044: {coatings specially adapted for cutting tools or wear applications} - C23C 30/005: {on hard metal substrates} - B23B 2224/04: Aluminium oxide - B23B 2224/32: Titanium carbide nitride (TiCN) - 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 coated tool may include a base member including a first surface, and a coating layer. The coating layer may include a plurality of voids located side by side in a first layer in a direction along an interface, which is a boundary between the first layer and a second layer. The second layer may include a lower layer part and an upper layer part, and an angle formed by a normal line of (001) surface of the constituent particles with respect to a cross section of the second layer is an orientation difference, the lower layer part of the second layer includes a ratio of the particles whose orientation difference is 10° or more of 50% or more, and the upper layer part of the second layer includes a ratio of the particles whose orientation difference is 10° or less of 80% or more. ## Claims ### Claim 1 A coated tool, comprising: a base member comprising a first surface; and a coating layer located at least on the first surface of the base member, wherein the coating layer comprises: a first layer located on the first surface and comprising a titanium compound, and a second layer contactedly located on the first layer and comprising aluminum oxide; the coating layer comprises a plurality of voids located side by side in the first layer in a direction along a boundary between the first layer and the second layer, and an average value of widths of the voids in a direction along the boundary is smaller than an average value of distances between the voids adjacent to each other in a cross section orthogonal to the first surface, and an average value of widths of the voids in a direction parallel to the first surface is greater than an average value of heights of the voids in a direction orthogonal to the first surface in the cross section orthogonal to the first surface; the second layer comprises, in its thickness direction, a lower layer part located at a side of the base member and having a thickness of 0.1 to 2.0 μm, and an upper layer part located at a side of the surface which is opposite to the side of the base member and having a thickness of 1.0 to 5.0 μm; and an angle formed by a normal line of (001) surface of constituent particles with respect to a cross section of the second layer is an orientation difference, the lower layer part of the second layer comprises a ratio of the particles whose orientation difference is 10° or more of 50% or more, and the upper layer part of the second layer comprises a ratio of the particles whose orientation difference is 10° or less of 80% or more. ### Claim 2 (depends on 1) The coated tool according to claim 1, wherein the first layer further comprises titanium carbonitride, and the second layer further comprises α-alumina. ### Claim 3 (depends on 1) The coated tool according to claim 1, wherein an average value of distances from the voids to the boundary is greater than an average value of heights of the voids in a direction orthogonal to the first surface in the cross section orthogonal to the first surface. ### Claim 4 (depends on 1) The coated tool according to claim 1, wherein an average value of distances from the voids to the boundary is greater than an average value of distances between the voids adjacent to each other in the cross section orthogonal to the first surface. ### Claim 5 (depends on 1) A cutting tool, comprising: a holder comprising a bar shape which extends from a first end to a second end and comprises a pocket located at a side of the first end; and the coated tool according to claim 1, which is located at the pocket. ### Claim 6 (depends on 3) The coated tool according to claim 3, wherein, in each void of the plurality of voids, a distance from the void to the boundary is greater than a height of the void in a direction orthogonal to the first surface in the cross section orthogonal to the first surface. ### Claim 7 (depends on 1) The coated tool according to claim 1, wherein the first layer comprises a plurality of regions, each having a different composition, with the plurality of regions laminated one on another, the plurality of regions comprises: a first region, a second region located on the first region, and an intermediate region located between the first region and the second region; and the plurality of voids are located in the intermediate region. ### Claim 8 (depends on 7) The coated tool according to claim 7, wherein the first region is a moderate temperature TiCN, and the second region is a high temperature TiCN. ### Claim 9 (depends on 1) The coated tool according to claim 1, wherein in the cross section orthogonal to the first surface, the average value of widths of the voids in a direction parallel to the first surface is w1, and the average value of heights of the voids in a direction orthogonal to the first surface is h1, and a ratio w1/h1 is greater than 1.2.