# US 12,180,565 B2 · Nickel-based superalloy > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,180,565 B2 - Document ID: US12180565B2 - Status: Granted - Kind: B2 - Application number: 17/781,596 - Filed: 2020-12-09 - Published: 2023-01-12 - Granted: 2024-12-31 - Earliest claimed: 2019-12-11 - Assignees: Safran; Office National d'Etudes et de Recherches Aerospatiales - Applicants: Safran; Office National D'Etudes Et De Recherches Aerospatiales - Inventors: Anne-Laure Rouffie; Jean-Michel Patrick Maurice Franchet; Didier Locq - Web page: https://patentgrep.com/patent/US12180565B2 ## CPC - C22C 19/056: {with the maximum Cr content being at least 10% but less than 20%} - C22C 1/0433: {Nickel- or cobalt-based alloys} - C22C 19/05: with chromium - C22F 1/10: of nickel or cobalt or alloys based thereon - Y02P 10/25: Process efficiency - C22C: ALLOYS (treatment of alloys C21D, C22F) - C22F: CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS (surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by this subclass, C23F17/00) - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract A Nickel-based superalloy, whose composition includes, in percent by weight of the total composition: Chromium: 10.0-11.25; Cobalt: 11.2-13.7; Molybdenum: 3.1-3.8; Tungsten: 3.1-3.8; Aluminium: 2.9-3.5; Titanium: 4.6-5.6; Niobium: 1.9-2.3; Hafnium: 0.25-0.35; Zirconium: 0.040-0.060; Carbon: 0.010-0.030; Boron: 0.01-0.030; Nickel: remainder as well as unavoidable impurities; the composition being free of tantalum. ## Claims ### Claim 1 A Nickel-based superalloy, whose composition comprises, in percent by weight of the total composition: Chromium: 10.0-11.25; Cobalt: 11.2-13.7; Molybdenum: 3.1-3.8; Tungsten: 3.1-3.8; Aluminium: 2.9-3.5; Titanium: 4.6-5.6; Niobium: 1.9-2.3; Hafnium: 0.25-0.35; Zirconium: 0.040-0.060; Carbon: 0.010-0.030; Boron: 0.01-0.030; Nickel: remainder as well as unavoidable impurities; the composition being free of tantalum. ### Claim 2 (depends on 1) The nickel-based superalloy according to claim 1, which has a volume fraction of gamma prime phase of between 52% and 60%. ### Claim 3 (depends on 2) The nickel-based superalloy according to claim 2, wherein a sum of the contents of Al, Ti and Nb in atomic % is between 13 and 15. ### Claim 4 (depends on 2) The nickel-based superalloy according to claim 2, wherein a ratio of contents (Ti+Nb)/Al in atomic % is less than 1.2. ### Claim 5 (depends on 1) The nickel-based superalloy according to claim 1, wherein a sum of the contents of W, Mo, Cr and Co, in atomic %, is greater than or equal to 25.5 and less than or equal to 29.5. ### Claim 6 (depends on 1) The nickel-based superalloy according to claim 1, wherein a sum of the contents of W and Mo, in atomic %, is greater than or equal to 2.3 and less than or equal to 3.9. ### Claim 7 (depends on 1) A powder of a superalloy according to claim 1. ### Claim 8 (depends on 1) A method for manufacturing a part made of superalloy according to claim 1, comprising the following steps: a—forging, b—gradient heat treatment of the part obtained in step a), c—final heat treatment of the entire dual-microstructure part obtained in step b) d—recovery of the part obtained in step c). ### Claim 9 (depends on 8) The method according to claim 8, wherein step b) of gradient heat treatment of the part obtained in step a) includes: b1—a first heating of a region of the part at a first temperature (T1) greater than a solvus temperature of a gamma prime phase of said superalloy and less than a melting temperature of said superalloy. ### Claim 10 (depends on 8) The method according to claim 8, wherein step c) of final heat treatment comprises the following successive steps: c1—solution heat treatment of the entire part obtained in step b) at a temperature (T2) less than the solvus temperature of the gamma prime phase of said superalloy; c2—quenching treatment of the entire part obtained in step c1); c3—tempering treatment of the entire part obtained in step c2). ### Claim 11 (depends on 10) The method according to claim 10, wherein step c3) is carried out at a temperature greater than 760° C. ### Claim 12 (depends on 1) A part made of superalloy according to claim 1, having a dual microstructure. ### Claim 13 (depends on 12) The part according to claim 12, wherein the part is a turbomachine part. ### Claim 14 (depends on 12) The part according to claim 12, wherein the part is a turbine part. ### Claim 15 (depends on 12) The part according to claim 12, wherein the part is a turbine disc, a compressor disc, a ring, a flange or a turbine housing. ### Claim 16 (depends on 1) The Nickel-based superalloy according to claim 1, wherein the composition comprises, in percent by weight of the total composition: Chromium: 10.0-11.0; Cobalt: 12.0-13.0; Molybdenum: 3.3-3.7; Tungsten: 3.1-3.5; Aluminium: 3.2-3.5; Titanium: 4.6-5.0; Niobium: 1.9-2.0; Hafnium: 0.25-3.0; Zirconium: 0.050-0.060; Carbon: 0.015-0.025; Boron: 0.01-0.02; Nickel: remainder as well as unavoidable impurities; the composition being free of tantalum. ### Claim 17 (depends on 16) The Nickel-based superalloy according to claim 16, wherein the composition essentially consists of, in percent by weight of the total composition: Chromium: 10.0-11.0; Cobalt: 12.0-13.0; Molybdenum: 3.3-3.7; Tungsten: 3.1-3.5; Aluminium: 3.2-3.5; Titanium: 4.6-5.0; Niobium: 1.9-2.0; Hafnium: 0.25-3.0; Zirconium: 0.050-0.060; Carbon: 0.015-0.025; Boron: 0.01-0.02; Nickel: remainder as well as unavoidable impurities; the composition being free of tantalum. ### Claim 18 (depends on 1) The Nickel-based superalloy according to claim 1, wherein the composition essentially consists of, in percent by weight of the total composition: Chromium: 10.0-11.25; Cobalt: 11.2-13.7; Molybdenum: 3.1-3.8; Tungsten: 3.1-3.8; Aluminium: 2.9-3.5; Titanium: 4.6-5.6; Niobium: 1.9-2.3; Hafnium: 0.25-0.35; Zirconium: 0.040-0.060; Carbon: 0.010-0.030; Boron: 0.01-0.030; Nickel: remainder as well as unavoidable impurities; the composition being free of tantalum.