# US 10,766,076 B2 · 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 10,766,076 B2 - Document ID: US10766076B2 - Status: Granted - Kind: B2 - Application number: 16/401,674 - Filed: 2019-05-02 - Published: 2019-11-14 - Granted: 2020-09-08 - Earliest claimed: 2018-05-09 - Assignees: Tungaloy Corporation - Applicants: Tungaloy Corporation - Inventors: Naoyuki Fukushima - Web page: https://patentgrep.com/patent/US10766076B2 ## CPC - B23B 27/148: {Composition of the cutting inserts} - C23C 28/042: {including a refractory ceramic layer, e.g. refractory metal oxides, ZrO2, rare earth oxides} - C04B 35/5626: {based on tungsten carbides} - C04B 41/009: {characterised by the material treated} - C04B 41/5031: {Alumina} - C04B 41/5068: {Titanium nitride} - C04B 41/87: Ceramics - C22C 29/067: {comprising a particular metallic binder} - C22C 29/08: based on tungsten carbide - C23C 16/0227: {by cleaning or etching} - C23C 16/308: {Oxynitrides} - C23C 16/34: Nitrides {(C23C16/303 takes precedence)} - C23C 16/36: Carbonitrides - C23C 16/403: {of aluminium, magnesium or beryllium} - C23C 28/04: only coatings of inorganic non-metallic material - C23C 30/005: {on hard metal substrates} - B23B 2222/28: Details of hard metal, i.e. cemented carbide - C04B 2235/3839: Refractory metal carbides - C04B 2235/3843: Titanium carbides - C04B 2235/3847: Tungsten carbides - C04B 2235/3856: Carbonitrides, e.g. titanium carbonitride, zirconium carbonitride - C04B 2235/3886: Refractory metal nitrides, e.g. vanadium nitride, tungsten nitride - C04B 2235/405: Iron group metals - 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) - C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE - C22C: ALLOYS (treatment of alloys C21D, C22F) ## Abstract A coated cutting tool comprising a cemented carbide and a coating layer formed on a surface of the cemented carbide, wherein: an average thickness of the coating layer is from 5.0 μm or more to 30.0 μm or less; and in the cemented carbide, when regarding a region thereof which ranges from the surface of the cemented carbide to a depth of 20.0 μm in a direction opposite to the coating layer as a surface region, and also regarding a region thereof on a side opposite to the coating layer across the surface region as an inner region, an average value of KAM values in the surface region KAMs and an average value of KAM values in the inner region KAMi satisfy a condition represented by formula (1) below. 0.00°≤|KAMs−KAMi|≤0.10° (1) ## Claims ### Claim 1 A coated cutting tool comprising: a cemented carbide; a coating layer formed on a surface of the cemented carbide; a surface region in the cemented carbide extending from the surface of the cemented carbide in a direction opposite from the coating layer; and an inner region in the cemented carbide positioned on an opposite side of the surface region from the coating layer that extends up to a thickness corresponding to a remainder of the cemented carbide, wherein: an average thickness of the coating layer is from 5.0 μm or more to 30.0 μm or less; in the coated cemented carbide, the surface region ranges from the surface of the cemented carbide to a depth of 20.0 μm, and an average value of KAM values in the surface region and an average value of KAM values in the inner region does not satisfy a condition represented by formula (1) below: 0.00°≤|KAMs−KAMi|≤0.10° (1) (In formula (1), KAMs denotes an average value of KAM values in the surface region, and KAMi denotes an average value of KAM values in the inner region), and the KAMs is outside of the range from 0.35° or more to 0.57° or less; the coated cemented carbide is subjected to dry shot blasting by setting shot pressure from 1.7 bar or higher to 1.9 bar or lower, using shot material with an average particle size from 120 μm or more to 420 μm or less, setting a shot angle to 90°, setting nozzle speed to 6,000 mm/minute or more to 7,000 mm/minute or less, and setting nozzle pitch interval to 3 mm or more to 5 mm or less; after the dry shot blasting, the average value of KAM values in the surface region and the average value of KAM values in the inner region satisfy the condition represented by formula (1), and the KAMs is from 0.35° or more to 0.57° or less. ### Claim 2 (depends on 1) The coated cutting tool according to claim 1, wherein the KAMS is from 0.35° or more to 0.55° or less after the dry shot blasting. ### Claim 3 (depends on 1) The coated cutting tool according to claim 1, wherein the KAMi is from 0.35° or more to 0.55° or less after the dry shot blasting. ### Claim 4 (depends on 1) The coated cutting tool according to claim 1, wherein the cemented carbide comprises 5.0 mass % or more to 12.0 mass % or less of a binder phase. ### Claim 5 (depends on 1) The coated cutting tool according to claim 1, wherein: the cemented carbide comprises a compound phase containing one or more kinds of a compound or compounds, each compound consisting of: an element of at least one kind selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr and Mo; and an element of at least one kind selected from the group consisting of C, N, O and B; and the cemented carbide comprises 3.0 mass % or more to 6.0 mass % or less of the compound phase. ### Claim 6 (depends on 1) The coated cutting tool according to claim 1, wherein: the coating layer comprises a lower layer and an upper layer formed on a surface of the lower layer in order from the cemented carbide side; the lower layer has an average thickness of from 1.5 μm or more to 15.0 μm or less; the lower layer is a Ti compound layer comprised of a layer of one kind selected from the group consisting of a Ti carbide layer, a Ti nitride layer, a Ti carbonitride layer, a Ti carboxide layer and a Ti carboxynitride layer, or comprised of layers of two or more kinds selected therefrom; the upper layer has an average thickness of from 1.5 μm or more to 15.0 μm or less; and the upper layer is an α-type aluminum oxide layer comprised of α-type aluminum oxide. ### Claim 7 (depends on 2) The coated cutting tool according to claim 2, wherein the KAMi is from 0.35° or more to 0.55° or less after the dry shot blasting. ### Claim 8 (depends on 2) The coated cutting tool according to claim 2, wherein the cemented carbide comprises 5.0 mass % or more to 12.0 mass % or less of a binder phase. ### Claim 9 (depends on 3) The coated cutting tool according to claim 3, wherein the cemented carbide comprises 5.0 mass % or more to 12.0 mass % or less of a binder phase. ### Claim 10 (depends on 7) The coated cutting tool according to claim 7, wherein the cemented carbide comprises 5.0 mass % or more to 12.0 mass % or less of a binder phase. ### Claim 11 (depends on 2) The coated cutting tool according to claim 2, wherein: the cemented carbide comprises a compound phase containing one or more kinds of a compound or compounds, each compound consisting of: an element of at least one kind selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr and Mo; and an element of at least one kind selected from the group consisting of C, N, O and B; and the cemented carbide comprises 3.0 mass % or more to 6.0 mass % or less of the compound phase. ### Claim 12 (depends on 3) The coated cutting tool according to claim 3, wherein: the cemented carbide comprises a compound phase containing one or more kinds of a compound or compounds, each compound consisting of: an element of at least one kind selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr and Mo; and an element of at least one kind selected from the group consisting of C, N, O and B; and the cemented carbide comprises 3.0 mass % or more to 6.0 mass % or less of the compound phase. ### Claim 13 (depends on 4) The coated cutting tool according to claim 4, wherein: the cemented carbide comprises a compound phase containing one or more kinds of a compound or compounds, each compound consisting of: an element of at least one kind selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr and Mo; and an element of at least one kind selected from the group consisting of C, N, O and B; and the cemented carbide comprises 3.0 mass % or more to 6.0 mass % or less of the compound phase. ### Claim 14 (depends on 7) The coated cutting tool according to claim 7, wherein: the cemented carbide comprises a compound phase containing one or more kinds of a compound or compounds, each compound consisting of: an element of at least one kind selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr and Mo; and an element of at least one kind selected from the group consisting of C, N, O and B; and the cemented carbide comprises 3.0 mass % or more to 6.0 mass % or less of the compound phase. ### Claim 15 (depends on 8) The coated cutting tool according to claim 8, wherein: the cemented carbide comprises a compound phase containing one or more kinds of a compound or compounds, each compound consisting of: an element of at least one kind selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr and Mo; and an element of at least one kind selected from the group consisting of C, N, O and B; and the cemented carbide comprises 3.0 mass % or more to 6.0 mass % or less of the compound phase. ### Claim 16 (depends on 9) The coated cutting tool according to claim 9, wherein: the cemented carbide comprises a compound phase containing one or more kinds of a compound or compounds, each compound consisting of: an element of at least one kind selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr and Mo; and an element of at least one kind selected from the group consisting of C, N, O and B; and the cemented carbide comprises 3.0 mass % or more to 6.0 mass % or less of the compound phase. ### Claim 17 (depends on 10) The coated cutting tool according to claim 10, wherein: the cemented carbide comprises a compound phase containing one or more kinds of a compound or compounds, each compound consisting of: an element of at least one kind selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr and Mo; and an element of at least one kind selected from the group consisting of C, N, O and B; and the cemented carbide comprises 3.0 mass % or more to 6.0 mass % or less of the compound phase. ### Claim 18 (depends on 2) The coated cutting tool according to claim 2, wherein: the coating layer comprises a lower layer and an upper layer formed on a surface of the lower layer in order from the cemented carbide side; the lower layer has an average thickness of from 1.5 μm or more to 15.0 μm or less; the lower layer is a Ti compound layer comprised of a layer of one kind selected from the group consisting of a Ti carbide layer, a Ti nitride layer, a Ti carbonitride layer, a Ti carboxide layer and a Ti carboxynitride layer, or comprised of layers of two or more kinds selected therefrom; the upper layer has an average thickness of from 1.5 μm or more to 15.0 μm or less; and the upper layer is an α-type aluminum oxide layer comprised of α-type aluminum oxide. ### Claim 19 (depends on 3) The coated cutting tool according to claim 3, wherein: the coating layer comprises a lower layer and an upper layer formed on a surface of the lower layer in order from the cemented carbide side; the lower layer has an average thickness of from 1.5 μm or more to 15.0 μm or less; the lower layer is a Ti compound layer comprised of a layer of one kind selected from the group consisting of a Ti carbide layer, a Ti nitride layer, a Ti carbonitride layer, a Ti carboxide layer and a Ti carboxynitride layer, or comprised of layers of two or more kinds selected therefrom; the upper layer has an average thickness of from 1.5 μm or more to 15.0 μm or less; and the upper layer is an α-type aluminum oxide layer comprised of α-type aluminum oxide. ### Claim 20 (depends on 4) The coated cutting tool according to claim 4, wherein: the coating layer comprises a lower layer and an upper layer formed on a surface of the lower layer in order from the cemented carbide side; the lower layer has an average thickness of from 1.5 μm or more to 15.0 μm or less; the lower layer is a Ti compound layer comprised of a layer of one kind selected from the group consisting of a Ti carbide layer, a Ti nitride layer, a Ti carbonitride layer, a Ti carboxide layer and a Ti carboxynitride layer, or comprised of layers of two or more kinds selected therefrom; the upper layer has an average thickness of from 1.5 μm or more to 15.0 μm or less; and the upper layer is an α-type aluminum oxide layer comprised of α-type aluminum oxide.