Classifications

• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22C—ALLOYS
  • C22C19/00—Alloys based on nickel or cobalt
  • C22C19/03—Alloys based on nickel or cobalt based on nickel
  • C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
  • C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
  • C22C19/056—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 10% but less than 20%
• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22C—ALLOYS
  • C22C1/00—Making non-ferrous alloys
  • C22C1/04—Making non-ferrous alloys by powder metallurgy
  • C22C1/0433—Nickel- or cobalt-based alloys
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
  • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
  • B22F1/05—Metallic powder characterised by the size or surface area of the particles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
  • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
  • B22F10/20—Direct sintering or melting
  • B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
  • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
  • B22F10/30—Process control
  • B22F10/36—Process control of energy beam parameters
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
  • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
  • B22F10/30—Process control
  • B22F10/36—Process control of energy beam parameters
  • B22F10/366—Scanning parameters, e.g. hatch distance or scanning strategy
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
  • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
  • B22F10/60—Treatment of workpieces or articles after build-up
  • B22F10/64—Treatment of workpieces or articles after build-up by thermal means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
  • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
  • B22F10/60—Treatment of workpieces or articles after build-up
  • B22F10/66—Treatment of workpieces or articles after build-up by mechanical means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
  • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
  • B22F5/009—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of turbine components other than turbine blades
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
  • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
  • B22F5/04—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of turbine blades
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B33—ADDITIVE MANUFACTURING TECHNOLOGY
  • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
  • B33Y10/00—Processes of additive manufacturing
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B33—ADDITIVE MANUFACTURING TECHNOLOGY
  • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
  • B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
  • B33Y40/20—Post-treatment, e.g. curing, coating or polishing
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B33—ADDITIVE MANUFACTURING TECHNOLOGY
  • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
  • B33Y50/00—Data acquisition or data processing for additive manufacturing
  • B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B33—ADDITIVE MANUFACTURING TECHNOLOGY
  • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
  • B33Y70/00—Materials specially adapted for additive manufacturing
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B33—ADDITIVE MANUFACTURING TECHNOLOGY
  • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
  • B33Y80/00—Products made by additive manufacturing
• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
  • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
  • C22F1/10—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
  • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
  • F01D5/12—Blades
  • F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
  • B22F2301/00—Metallic composition of the powder or its coating
  • B22F2301/15—Nickel or cobalt
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
  • B22F2304/00—Physical aspects of the powder
  • B22F2304/10—Micron size particles, i.e. above 1 micrometer up to 500 micrometer
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
  • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
  • B22F2998/10—Processes characterised by the sequence of their steps
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
  • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
  • F05D2230/00—Manufacture
  • F05D2230/30—Manufacture with deposition of material
  • F05D2230/31—Layer deposition
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
  • F05D2300/00—Materials; Properties thereof
  • F05D2300/70—Treatment or modification of materials
  • F05D2300/701—Heat treatment
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
  • Y02P10/00—Technologies related to metal processing
  • Y02P10/25—Process efficiency

Definitions

• TITLE Metallic powder for a powder bed additive manufacturing process
• the present invention relates to the field of additive manufacturing and more particularly to alloys for the implementation of an additive manufacturing process on a powder bed.
• LBM powder bed additive manufacturing
• a powder comprising a metal alloy for an additive manufacturing process on a powder bed, which makes it possible to obtain a material that retains its characteristics of tensile strength, creep and resistance to oxidation. and corrosion, at least up to a temperature of 1000°C.
• the invention provides a metal powder for a powder bed additive manufacturing process, the metal powder comprising a nickel-based alloy comprising between 0.05% and 0.09% carbon, between 14.25% and 15.75% cobalt, between 14% and 15.25% chromium, between 4% and 4.6% aluminium, between 3.9% and 4.5% molybdenum, between 3% and 3, 7% titanium, maximum 0.5% iron, between 0.012% and 0.02% boron, maximum 0.06% zirconium, maximum 0.15% manganese, maximum 0.2% silicon, maximum 0.1% copper, maximum 25ppm sulphur, maximum 0.5ppm bismuth, maximum maximum 5ppm silver, maximum 5ppm lead, maximum 60ppm dinitrogen and maximum 200ppm oxygen.
• a nickel-based alloy comprising between 0.05% and 0.09% carbon, between 14.25% and 15.75% cobalt, between 14% and 15.25% chromium, between 4% and 4.6% aluminium, between 3.9% and 4.5% molybdenum, between 3% and 3,
• the metal powder comprises a plurality of grains having a particle size according to which 10% of the grains have a diameter of between 8 ⁇ m and 28 ⁇ m.
• the metal powder comprises a plurality of grains having a particle size according to which 50% of the grains have a diameter of between 22 ⁇ m and 45 ⁇ m.
• the metal powder comprises a plurality of grains having a particle size according to which 90% of the grains have a diameter of between 35 ⁇ m and 75 ⁇ m.
• the invention proposes a process for additive manufacturing on a powder bed by laser fusion of a powder according to the first aspect, the process making it possible to manufacture a part in a material obtained by laser fusion of said powder.
• the laser emits a beam with a power between 150W and 300W.
• the laser is moved at a speed between 900mm/s and 1300mm/s.
• the laser emits a beam having a diameter between 50 ⁇ m and 200 ⁇ m.
• the laser fuses the powder in bands, each band having a width between 2mm and 15mm.
• Each merged strip overlaps at least one other strip, over a width between 0.05mm and 0.15mm.
• each layer of fused powder has a thickness between 20 ⁇ m and 60 ⁇ m.
• the method comprises a step of improving the structure of the material obtained by laser fusion of said powder, comprising at least the following phases:
• thermomechanical treatment at a temperature between 1190°C and 1210°C, for 4 hours, with the application of a mechanical pressure greater than or equal to 100MPa;
• the step of improving the structure of the material also includes the following phase:
• the step of improving the structure of the material also comprises the following phase or phases: detention before (b) and/or after (f) the heat treatments (c, d, e) at a temperature between 750° C. and 770° C., for 4 hours.
• the invention proposes the material obtained according to the process according to the second aspect, comprising a nickel base alloy comprising between 0.05% and 0.090% carbon, between 14.25% and 15.75% cobalt, between 14% and 15.25% chromium, between 4% and 4.6% aluminium, between 3.9% and 4.5% molybdenum, between 3% and 3.7% titanium, maximum 0 .5% iron, between 0.012% and 0.020% boron, maximum 0.060% zirconium, maximum 0.150% manganese, maximum 0.2% silicon, maximum 0.1% copper, maximum 25ppm sulphur, maximum 0.5ppm bismuth, maximum 5ppm silver, maximum 5ppm lead, maximum 100ppm dinitrogen, maximum 300ppm oxygen, maximum 500ppm platinum, maximum 500ppm vanadium.
• a nickel base alloy comprising between 0.05% and 0.090% carbon, between 14.25% and 15.75% cobalt, between 14% and 15.25% chromium, between 4% and 4.6% aluminium, between 3.9% and 4.5% mo
• the invention proposes a turbomachine part made of the material according to the third aspect.
• the invention proposes a turbomachine comprising at least one part according to the fourth aspect.
• Figure 1 is a table detailing the preferred composition of the powder object of the invention.
• Figure 2 is a photograph of the as-melted alloy as directly obtained from the powder object of the invention.
• FIG. 3 schematically represents a step for improving the structure of the material of a preferred embodiment of the method according to the invention.
• Figure 4 is a table detailing the composition of the material preferably obtained by the process according to the invention.
• Figure 5a is a photograph according to a foreground of the material preferably obtained by the process according to the invention.
• FIG. 5b is a photograph according to a second plane of the material preferably obtained by the process according to the invention.
• the invention proposes a metal powder for an additive manufacturing process on a powder bed.
• the metal powder comprises a nickel-based alloy comprising at least carbon, cobalt, chromium, aluminum, molybdenum, titanium, iron, boron, zirconium, manganese, silicon, copper, sulphur, bismuth, silver, lead, nitrogen and oxygen.
• the nickel base alloy comprises between 0.05% and 0.09% carbon, between 14.25% and 15.75% cobalt, between 14% and 15.25 % chromium, between 4% and 4.6% aluminium, between 3.9% and 4.5% molybdenum, between 3% and 3.7% titanium, maximum 0.5% iron, between 0.012% and 0.02% boron, maximum 0.06% zirconium, maximum 0.15% manganese, maximum 0.2% silicon, maximum 0.1% copper, maximum 25ppm sulphur, maximum 0.5ppm bismuth, maximum 5ppm silver, maximum 5ppm lead, maximum 60ppm nitrogen and maximum 200ppm oxygen.
• the powder that is the subject of the invention comprises a rate of nitrogen, oxygen and sulfur suitable for use in an additive manufacturing process on a powder bed.
• thermomechanical characteristics required after fusion by a laser beam of the powder.
• metal powders are known for foundry (or metallurgy in general) which contain substantially the same list of elements, but their particle size and their sulfur, nitrogen and oxygen levels are not suitable.
• each of the sulfur, nitrogen and oxygen is present in said alloy in an amount less than a maximum amount for additive manufacturing, advantageously 200ppm, very advantageously even 25ppm for sulfur and 60ppm for dinitrogen.
• the powder also has a particle size suitable for use in an additive manufacturing process on a powder bed.
• 10% of the grains have a diameter of between 8 ⁇ m and 28 ⁇ m, 50% of the grains have a diameter of between 22 ⁇ m and 45 ⁇ m and 90% of the grains have a diameter of between 35 ⁇ m and 75 ⁇ m.
• 10% of the grains have a diameter of between 10 ⁇ m and 25 ⁇ m, 50% of the grains have a diameter of between 25 ⁇ m and 40 ⁇ m and 90% of the grains have a diameter of between 40 ⁇ m and 70 ⁇ m.
• This specific particle size allows very advantageously to combine an optimal compactness of the powder when it is used in an additive manufacturing process on a powder bed, while having an optimal flowability and minimizing the melting stresses (which reduces the risks of cracking of the material obtained by an additive manufacturing process).
• this particle size is obtained via an atomization process, which makes it possible to ensure the morphology of each grain while limiting the risks of pollution of the powder by foreign bodies.
• the invention relates to a process for additive manufacturing on a powder bed, by laser melting of a powder according to the invention.
• the method uses an additive manufacturing machine, in which a system deposits a bed of powder and emits, for example, a laser beam to melt and consolidate a layer of a material being manufactured.
• a bed of powder a few tens of microns thick is deposited on a plate, generally using a scraper. Then we melt locally.
• the plate is lowered and the deposition/fusion cycle is repeated until the part is built.
• spot In a classic way the laser beam illuminates a defined surface which is usually called "spot".
• the laser beam is enveloped in a jet of neutral gas.
• argon or dinitrogen will be used.
• the laser emits a beam with a power of between 150W and 300W.
• the laser is preferably moved at a speed of between 900mm/s and 1300mm/s.
• the laser emits a beam having a diameter of between 50 ⁇ m and 200 ⁇ m. It is specified that by diameter of the beam, it is understood that the spot, the surface illuminated by the beam, has a diameter of between 50 ⁇ m and 200 ⁇ m.
• the laser beam is moved by band and by superimposed layer to consolidate the material being manufactured.
• each band has a width of between 2mm and 15mm.
• the merged bands can overlap over a width between 0.05mm and 0.15mm.
• each fused powder layer can have a thickness of between 20 ⁇ m and 60 ⁇ m.
• micro-cracking as seen in figure 2, with micro-cracks of the order of 1 to 50 ⁇ m. These micro-cracks allow stress relief locally throughout the part during melting and make it possible to manufacture the material without macro-cracks (breakage of parts during manufacture). To be able to use this alloy, it is necessary to remove these microcracks which would greatly harm the mechanical properties of the parts.
• the process includes a step of improving the structure of the material, by various heat treatments.
• Each heat treatment ends with air cooling (for example under argon protection).
• this step may include the following phases:
• thermomechanical treatment a phase of thermomechanical treatment (a) at a temperature between 1190°C and 1210°C, for 4 hours (within 20%), with the application of a mechanical pressure greater than or equal to 100MPa.
• thermomechanical treatment (application of high temperature and pressure) is of the hot isostatic compaction (CIC) type. It makes it possible to reduce the microcracks that may be present in the material at the end of additive manufacturing (i.e. at the end of the fusion-consolidation process by a laser beam).
• CIC hot isostatic compaction
• phase (b) of (first) stress relief called interoperation treatment, at a temperature of between 750° C. and 770° C., for 4 hours (within 20%). It can be used depending on the range of parts, before the main phase of heat treatment.
• This main phase known as the “use state” makes it possible to obtain the metallurgical health necessary for the use of the material for turbomachine parts, and includes a succession of heat treatments.
• the latter is innovative and makes it possible to enlarge the metallurgical grain. Indeed, the latter at the melting outlet is relatively low, of the order of 2 to 7 ⁇ STM, and the creep properties are better when the grain is of larger size, as in foundry with a grain of the order 00 ⁇ STM ( ⁇ STM notation gives smaller grain sizes for larger ASTM values).
• This heat treatment (c) makes it possible to obtain a grain between 00 and 5 ASTM which guarantees good creep, tensile and fatigue properties for turbine blades and nozzles.
• treatment (c) is not mandatory.
• the employment state phase then includes (d) a second heat treatment at a temperature between 1150°C and 1160°C, for 2 hours (to within 20%), followed by a first cooling down to 1080 °C at an average rate between 47 and 67°C per hour, followed by a second cooling to 540°C at a rate of at least 16°C per minute.
• This treatment (d) called “quenching” because of the rapid second cooling, allows the re-dissolution and the precipitation of the good alloying elements, in particular the germination and growth of the gamma prime precipitates.
• the employment state phase comprises (e) a third heat treatment, called "tempering", at a temperature between 750° C. and 770° C., for 4 hours (to within 20%), for improved tensile properties.
• This treatment (e) makes it possible to play on the precipitation of the carbides to promote their presence at the grain boundaries.
• the invention relates to a material obtained according to the process of the invention.
• the material obtained comprises a nickel-based alloy comprising between 0.05% and 0.090% carbon, between 14.25% and 15.75% cobalt, between 14% and 15.25% chromium, between 4% and 4.6% aluminium, between 3.9% and 4.5% molybdenum, between 3% and 03.7% titanium, maximum 0, 5% iron, between 0.012% and 0.020% boron, maximum 0.060% zirconium, maximum 0.150% manganese, maximum 0.2% silicon, maximum 0.1% copper, maximum 25ppm sulphur, maximum 0.5ppm bismuth, maximum 5ppm silver, maximum 5ppm lead, maximum 100ppm nitrogen, maximum 300ppm oxygen. It can be seen that the material may include other chemical elements in trace amounts, in particular:
• the variation in the rate of oxygen and dinitrogen, compared to the composition of the powder, is due to a capture of oxygen and dinitrogen during the execution of the additive manufacturing process.
• the invention relates to a turbomachine part manufactured according to the method of the invention, i.e. in said material as described previously. According to another aspect, the invention relates to a turbomachine comprising at least one part according to the invention.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Materials Engineering (AREA)
• Manufacturing & Machinery (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• Organic Chemistry (AREA)
• Metallurgy (AREA)
• Thermal Sciences (AREA)
• Plasma & Fusion (AREA)
• Automation & Control Theory (AREA)
• Crystallography & Structural Chemistry (AREA)
• General Engineering & Computer Science (AREA)
• Powder Metallurgy (AREA)
• Manufacture Of Metal Powder And Suspensions Thereof (AREA)

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• 2021
  • 2021-12-07 FR FR2113047A patent/FR3129858B1/fr active Active
• 2022
  • 2022-12-05 US US18/717,131 patent/US20250034680A1/en active Pending
  • 2022-12-05 EP EP22834698.7A patent/EP4444488A1/de active Pending
  • 2022-12-05 WO PCT/FR2022/052244 patent/WO2023105150A1/fr not_active Ceased
  • 2022-12-05 CN CN202280081323.0A patent/CN118369171A/zh active Pending

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