# US 12,000,034 B2 · Coated tool > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,000,034 B2 - Document ID: US12000034B2 - Status: Granted - Kind: B2 - Application number: 17/793,674 - Filed: 2021-01-18 - Published: 2023-03-09 - Granted: 2024-06-04 - Earliest claimed: 2020-01-20 - Assignees: KYOCERA Corporation; The University of Tokyo - Applicants: Kyocera Corporation; The University of Tokyo - Inventors: Hayato Kubo; Takahito Tanibuchi; Yukihiro Shimogaki; Takeshi Momose; Momoko Deura - Web page: https://patentgrep.com/patent/US12000034B2 ## CPC - B23B 27/14: Cutting tools of which the bits or tips {or cutting inserts} are of special material - C23C 14/0641: {Nitrides (C23C14/0617 takes precedence)} - B23B 51/00: Tools for drilling machines - B23C 5/16: characterised by physical features other than shape - C23C 16/34: Nitrides {(C23C16/303 takes precedence)} - C23C 30/005: {on hard metal substrates} - B23B 2224/24: Titanium aluminium nitride - B23B 2228/10: Coatings - B23C 2224/24: Titanium aluminium nitride (TiAlN) - B23C 2228/10: Coating - 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) - B23C: MILLING (broaching B23D; broach-milling in making gears B23F; arrangement for copying or controlling B23Q) ## Abstract A coated tool in a non-limiting embodiment of the present disclosure includes a base and a coating film located on the base. The coated tool includes a first surface, a second surface adjacent to the first surface, and a cutting edge located on at least a part of a ridge part of the first surface and the second surface. The coating film includes an AlTiN film. The coating film has a first compressive stress σ11 in a first direction which is parallel to a surface of the base and intersects with the cutting edge at an angle of 90°, and a second compressive stress σ22 in a second direction which intersects with the first direction at an angle of 90°. The first compressive stress σ11 is different from the second compressive stress σ22. ## Claims ### Claim 1 A coated tool, comprising a base and a coating film located on the base, the coated tool comprising: a first surface, a second surface adjacent to the first surface, and a cutting edge located on at least a part of a ridge part of the first surface and the second surface, wherein the coating film comprises an AlTiN film; the coating film has a first compressive stress σ11 in a first direction which is parallel to a surface of the base and intersects with the cutting edge at an angle of 90°, and a second compressive stress σ22 in a second direction which intersects with the first direction at an angle of 90°, and the first compressive stress σ11 is different from the second compressive stress σ22. ### Claim 2 (depends on 1) The coated tool according to claim 1, wherein the first compressive stress σ11 is 1.05 times or more than the second compressive stress σ22. ### Claim 3 (depends on 1) The coated tool according to claim 1, wherein the first compressive stress σ11 is 200-2000 MPa, and the second compressive stress σ22 is 100-1500 MPa. ### Claim 4 (depends on 1) The coated tool according to claim 1, wherein the AlTiN film is represented by AlxTi1-xN, and x is 0.7 to 0.9. ### Claim 5 (depends on 1) The coated tool according to claim 1, wherein the first surface is a rake surface, and the second surface is a flank surface. ### Claim 6 A method for making a coated tool, the method comprising: providing a base of the coated tool, the base comprising: a first surface, a second surface adjacent to the first surface, and a cutting edge located on at least a part of a ridge part of the first surface and the second surface; and forming a coating film using chemical vapor deposition on at least part of the base, the coating film comprising an AlTiN film with a first compressive stress σ11 in a first direction which is parallel to a surface of the base and intersects with the cutting edge at an angle of 90°, and a second compressive stress σ22 in a second direction which intersects with the first direction at an angle of 90°, wherein the first compressive stress σ11 is larger than the second compressive stress σ22. ### Claim 7 (depends on 6) The method according to claim 6, wherein the first compressive stress σ11 is 1.05 times or more than the second compressive stress σ22. ### Claim 8 (depends on 6) The method according to claim 6, wherein the first compressive stress σ11 is 200-2000 MPa, and the second compressive stress σ22 is 100-1500 MPa. ### Claim 9 (depends on 6) The method according to claim 6, wherein the AlTiN film is represented by AlxTi1-xN, and x is 0.7 to 0.9. ### Claim 10 (depends on 6) The method according to claim 6, wherein the first surface is a rake surface, and the second surface is a flank surface. ### Claim 11 (depends on 6) The method according to claim 6, wherein when forming the coating layer using chemical vapor deposition, the coating layer is deposited by supplying a composition of a mixed gas in a direction intersecting with the cutting edge at approximately right angles. ### Claim 12 (depends on 11) The method according to claim 11, wherein the mixed gas is supplied at a velocity in a range of 5 m/s to 50 m/s. ### Claim 13 (depends on 6) The method according to claim 6, wherein when forming the coating layer using chemical vapor deposition, the coating layer is deposited by supplying a composition of a mixed gas in a direction approximately parallel to the cutting edge. ### Claim 14 (depends on 13) The method according to claim 13, wherein the mixed gas is supplied at a velocity in a range of 5 m/s to 50 m/s and a flow rate in a range of 10 L/min. to 100 L/min.