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WO2019118723A1 - Procédé et appareil de fusion et de solidification de métal à haute pression - Google Patents

Procédé et appareil de fusion et de solidification de métal à haute pression Download PDF

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Publication number
WO2019118723A1
WO2019118723A1 PCT/US2018/065444 US2018065444W WO2019118723A1 WO 2019118723 A1 WO2019118723 A1 WO 2019118723A1 US 2018065444 W US2018065444 W US 2018065444W WO 2019118723 A1 WO2019118723 A1 WO 2019118723A1
Authority
WO
WIPO (PCT)
Prior art keywords
chamber
melt
feedstock
valve
cooling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2018/065444
Other languages
English (en)
Inventor
Vivek M. Sample
Michael J. CARDINALE
Raymond J. Kilmer
Evan C. WAITKUS
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Howmet Aerospace Inc
Original Assignee
Arconic Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Arconic Inc filed Critical Arconic Inc
Publication of WO2019118723A1 publication Critical patent/WO2019118723A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • 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
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B22F2009/086—Cooling after atomisation
    • 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
    • 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
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • 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
    • C22C1/0408—Light metal alloys
    • C22C1/0416—Aluminium-based alloys

Definitions

  • This disclosure generally relates to apparatuses for manufacturing metal products and more particularly to metal alloys such as aluminum alloys produced by melting various metal components and ingredients together.
  • the Aluminum Association Global Advisory Group defines“aluminum alloys” as“aluminum which contains alloying elements, where aluminum predominates by mass over each of the other elements and where the aluminum content is not greater than 99.00%.”
  • An“alloying element” is a“metallic or non-metallic element which is controlled within specific upper and lower limits for the purpose of giving the aluminum alloy certain special properties” ( ⁇ 2.2.3).
  • a casting alloy is defined as“alloy primarily intended for the production of castings,” ( ⁇ 2.2.5) and a“wrought alloy” is“alloy primarily intended for the production of wrought products by hot and/or cold working” ( ⁇ 2.2.5).
  • multi-component alloy product and the like means a product with a metal matrix, where at least four different elements making up the matrix, and where the multi-component product comprises 5-35 at. % of the at least four elements.
  • at least five different elements make up the matrix
  • the multi- component product comprises 5-35 at. % of the at least five elements.
  • at least six different elements make up the matrix
  • the multi- component product comprises 5-35 at. % of the at least six elements.
  • at least seven different elements make up the matrix
  • the multi- component product comprises 5-35 at. % of the at least seven elements.
  • at least eight different elements make up the matrix, and the multi- component product comprises 5-35 at. % of the at least eight elements.
  • additives may also be used relative to the matrix of the multi-component alloy product.
  • This disclosure describes a novel apparatus and process for continuous formation of a metal alloy granulated product, wire, sheet or ingot via an isothermal process in which powdered metal feedstock, such as a finely granulated metal feedstock, under a high pressure inert environment, is introduced into a two stage melting furnace, melted, and then rapidly cooled into a solid form product, all under a high pressure environment.
  • the apparatus and process may be utilized to form binaries, ternaries, intermetallic and multicomponent alloy products.
  • a feedstock supply of at least a low boiling point element and a high melting point element is gathered in a pressurizable receiver.
  • This feedstock may be in any form such as fine or course granulated material or powder.
  • This feedstock is first introduced into the receiver through a first valve which is then closed, and the receiver pressurized to ensure a nonreactive environment. This feedstock is then passed through a second valve into a two stage melting furnace.
  • the first stage of the melting furnace includes an induction melting chamber. This chamber experiences large thermal gradients as the feedstock is introduced at room temperature and heated to form a molten mass.
  • the second stage of the melting furnace is an accumulator that is maintained at essentially isothermal conditions so as to provide a uniform mixture and distribution of constituent elements within the melt.
  • the melt is then passed through a discharge device into a cooling chamber, preferably a splat cooling chamber where it is rapidly cooled while at pressure to a solid state product structure that maintains a uniform distribution of constituent elements within the solid state structure.
  • the solid state product may be in the form of flakes, spheres, wire, or sheet depending on the configuration of the discharge device and the cooling mechanism within the splat cooling chamber.
  • the product is then collected, pressure reduced, and the product discharged for subsequent processing and use.
  • One such use of the solid state product produced via the apparatus and process described herein is as feedstock for additive manufacturing processes.
  • the process and apparatus may be operated in essentially a continuous manner by introducing a feedstock portion into a pressurizable receiver, removing air from the receiver and pressurizing the receiver with a nonreactive gas such as an inert gas, transferring the pressurized feedstock portion from the receiver into a melting furnace pressurized with the inert gas, heating the feedstock portion to form a melt, passing the melt into a pressurized accumulator chamber, discharging a portion of the melt from the accumulator chamber through a discharge device into a splat cooler where the portion of the melt is very rapidly cooled into a solid state while at pressure, and sequentially repeating the introducing, pressurizing, transferring, melting, passing, discharging and cooling operations until a desired quantity of solidified product is produced. The solidified product is then collected, pressure reduced to atmospheric, and the collected product released for further processing and/or use.
  • a nonreactive gas such as an inert gas
  • An apparatus in accordance with an exemplary embodiment of the present disclosure preferably includes a pressurizable feedstock receiver connected via a first valve to a feedstock supply of feedstock for producing a metal product that includes at least a low boiling point element and a high melting point element.
  • the feedstock preferably includes the low melting point element and the high melting point element.
  • the apparatus also includes a pressurizable feedstock induction melting chamber for producing a melt.
  • the melting chamber is connected to the receiver via a second valve.
  • a pressurizable accumulator chamber is connected to the feedstock induction melting chamber via an internal stem plug valve. The accumulator chamber is configured to maintain the melt therein at a constant temperature.
  • the apparatus also includes a discharge device and a pressurizable cooling chamber connected to the accumulator chamber through the discharge device.
  • the induction melting chamber, the accumulator chamber, the discharge device and the cooling chamber are pressurized to a predetermined pressure at least greater than a boiling point of the low boiling point element of the feedstock.
  • the second valve is preferably remotely operated such that the valve may be opened only when the receiver and melting chamber are at the
  • the apparatus may also include a pressurizable collection chamber connected to the cooling chamber via a third valve.
  • the discharge device preferably includes a divergent nozzle and may include multiple orifices opening into the cooling chamber.
  • the internal plug valve is preferably operable to maintain a predetermined level band of melt in the accumulator chamber.
  • pressurization of the various chambers is accomplished with a nonreactive gas such as argon.
  • a nonreactive gas such as argon.
  • the nonreactive gas may be accompanied by an additive gas, for example, such as nitrogen or hydrogen.
  • the melt is preferably driven from the melt chamber to the accumulator chamber during operation by a differential pressure applied between the melting chamber and the accumulator chamber.
  • a process in accordance with the present disclosure may be viewed as including introducing a portion of feedstock including at least one of a low boiling point element and at least one of a high melting point element into a pressurizable receiver via a first valve, pressurizing the receiver with a nonreactive gas to a predetermined pressure greater than a boiling point of the low boiling element to provide a portion of pressurized feedstock, transferring the portion of pressurized feedstock into a pressurized induction melting chamber connected to the receiver via a second valve at the predetermined pressure, heating the portion of pressurized feedstock to form a melt, passing the melt to a pressurized accumulator chamber connected to the feedstock induction melting chamber through a third valve, passing the melt accumulated in the accumulator chamber through a discharge device to a pressurized cooling chamber, and cooling the melt to a solid form product in the cooling chamber.
  • This method or process may further include repeating the introducing, pressurizing, transferring, melting, passing, and cooling operations for a next portion of
  • pressurizing includes introducing a partial pressure of another gas selected from the group consisting of nitrogen and hydrogen.
  • the predetermined pressure is also sufficient to prevent boiling of any additive introduced into the melt in addition to the feedstock.
  • This feedstock may be granulated or may be a powder or may be a combination of both.
  • the process may further include operations of cooling the melt in the cooling chamber by passing the solidifying melt between parallel rollers.
  • the process may alternatively include cooling the melt in a splat cooling chamber by passing the solidifying melt over rotating cold drums.
  • the nonreactive gas may be an inert gas.
  • the inert gas and the additive gas are both introduced in one or more of the receiver, the melting chamber, the accumulator chamber and the cooling chamber.
  • the inert gas and the additive gas may pressurize the accumulator chamber prior to passing the melt into the accumulator chamber.
  • the nonreactive gas may be an inert gas such as Argon.
  • the operation of passing may include controlling differential pressure within a narrow band to drive the melt into the cooling chamber.
  • the flow of melt into the splat cooling chamber may preferably be controlled by maintaining a required differential pressure.
  • an exemplary apparatus may include a pressurizable feedstock receiver connected via a first valve to a feedstock supply of feedstock for producing a metal product that includes at least a low boiling point element and a high melting point element.
  • the feedstock may preferably include both the low melting point element and the high melting point element.
  • the apparatus also includes a pressurizable feedstock induction melting chamber for producing a melt.
  • the melting chamber is connected to the receiver via a second valve.
  • the pressurizable accumulator chamber is connected to the feedstock induction melting chamber via an internal stem plug valve.
  • the accumulator chamber is configured to maintain the melt therein at a constant temperature.
  • the apparatus may also include a discharge device and a pressurizable cooling chamber connected to the accumulator chamber through the discharge device.
  • the induction melting chamber, the accumulator chamber, the discharge device and the cooling chamber are pressurized to a predetermined pressure at least greater than a boiling point of the low boiling point element of the feedstock.
  • the second valve is preferably remotely operated such that the valve may be opened only when the receiver and melting chamber are at the predetermined pressure.
  • the apparatus may also include a pressurizable collection chamber connected to the cooling chamber via a third valve.
  • the discharge device preferably includes a divergent nozzle and may include multiple orifices opening into the cooling chamber.
  • the internal plug valve is operable to maintain a predetermined level band of melt in the accumulator chamber.
  • pressurization of the various chambers is accomplished with a nonreactive gas such as argon.
  • the nonreactive gas may be accompanied by an additive gas, for example, such as nitrogen or hydrogen.
  • the melt may be driven from the melt chamber to the accumulator chamber during operation by a differential pressure applied between the melting chamber and the accumulator chamber.
  • a process in accordance with the present disclosure may be viewed as including introducing a portion of feedstock including at least one of a low boiling point element and at least one of a high melting point element into a pressurizable receiver via a first valve, pressurizing the receiver with a nonreactive gas to a predetermined pressure greater than a boiling point of the low boiling element to provide a portion of pressurized feedstock, transferring the portion of pressurized feedstock into a pressurized induction melting chamber connected to the receiver via a second valve at the predetermined pressure, heating the portion of pressurized feedstock to form a melt, passing the melt to a pressurized accumulator chamber connected to the feedstock induction melting chamber through a third valve, passing the melt accumulated in the accumulator chamber through a discharge device to a pressurized cooling chamber, and cooling the melt to a solid form product in the cooling chamber.
  • a method or process in accordance with this disclosure may further include repeating the introducing, pressurizing, transferring, melting, passing, and cooling operations for a next portion of feedstock thereby continuously forming product.
  • pressurizing includes introducing a partial pressure of another gas selected from the group consisting of nitrogen and hydrogen.
  • the predetermined pressure preferably sufficient to prevent boiling of any additive introduced into the melt in addition to the feedstock.
  • this feedstock may be granulated or may be a powder or may be a combination of both.
  • the process may further include operations of cooling the melt in the cooling chamber by passing the solidifying melt between parallel rollers.
  • the process may alternatively include cooling the melt in a splat cooling chamber by passing the solidifying melt over rotating cold drums.
  • the nonreactive gas may be an inert gas.
  • the inert gas and the additive gas are both introduced in one or more of the receiver, the melting chamber, the accumulator chamber and the cooling chamber.
  • the inert gas and the additive gas may be separately introduced.
  • the inert gas and the additive gas may pressurize the accumulator chamber prior to passing the melt into the accumulator chamber.
  • the nonreactive gas may be an inert gas such as Argon.
  • the operation of passing may include controlling differential pressure within a narrow band to drive the melt into the cooling chamber.
  • the flow of melt into the splat cooling chamber may be controlled by maintaining a required differential pressure.
  • FIG. 1 is a vertical sectional schematic view of an exemplary apparatus for producing a product in accordance with the present disclosure.
  • FIG. 2 is an enlarged view of the feed section of the apparatus shown in FIG. 1 .
  • FIG. 3 is an enlarged view of the two stage melting furnace section of the apparatus shown in FIG. 1.
  • FIG. 4 is an enlarged view of one embodiment of a splat cooling chamber in accordance with the apparatus shown in FIG. 1.
  • FIG. 5 is an enlarged view of the product collection section of the apparatus shown in FIG. 1.
  • Apparatus 100 includes a feedstock ingest section 102, a furnace section 104, a discharge device 106, a splat cooling section 108 and a product collection section 110.
  • FIG. 2 An enlarged view of the feed section 102 is shown in FIG. 2.
  • the feedstock section includes a feedstock hopper 122 in series with a feedstock receiver 124 that can be isolated via inlet valve 1 12 and outlet valve 1 14, air removed, and then pressurized with an inert gas along with selected additives such as nitrogen and/or hydrogen.
  • the vacuum system and gas pressurization system is not shown, for ease of explanation of the subject apparatus of the present disclosure.
  • Feedstock 126 is placed in the hopper 122.
  • Valve 1 12 is opened and valve 124 closed, permitting a portion of the feedstock 126 to drop into the receiver 124.
  • Valve 1 12 is then closed and air within the receiver 124 is purged with an inert gas such as argon or a vacuum drawn in the receiver 124 to remove the air.
  • the receiver 124 is then pressurized to a predetermined pressure with the inert gas and selected additives such as nitrogen and hydrogen may be introduced into the receiver 124.
  • each of the furnace section 104 and the splat cooling section is, or has already been, pressurized to the predetermined pressure with the inert gas and/or inert gas with selected additives such that the pressure within these sections is the same.
  • valve 1 14 is opened, permitting the feedstock 126 within the receiver 124 to drop into the first stage of the furnace section 104.
  • the valve 1 14 is then closed, readying the receiver 124 to accept another portion of feedstock 126.
  • the furnace section 104 includes an upper melting chamber 128 and a lower accumulator chamber 130 surrounded by induction heating coils 132.
  • the melting chamber 128 experiences large thermal gradients as feedstock, at room temperature, is cyclically introduced into the chamber 128 and heated to form a melt 134.
  • the lower chamber, or accumulator chamber 130 is isolated from the upper chamber 128 by a stem valve 1 16. This stem valve 1 16 separates the melt portion that experiences large temperature variations from the melt in the accumulator chamber 130 so as to maintain the melt in the accumulator chamber at constant temperature.
  • the stem valve 1 16 is periodically opened to permit melt 134 to pass into the accumulator chamber 130 so as to maintain a narrow band level of melt 134 within the accumulator so as to maintain a constant differential pressure head on the discharge device 106.
  • the temperature of the melt 134 within the accumulator chamber 130 is maintained constant so that the melt 134 therein is maintained essentially at isothermal conditions. This helps to ensure that the elemental composition of the melt in the accumulator chamber 130 remains uniform as it passes into the discharge device 106 and into the splat cooler section 108.
  • the discharge device section 106 and splat cooler section 108 is shown in FIG. 4.
  • the melt 134 continually passes out of the accumulator chamber 130 through a discharge device such as a divergent nozzle 136, a convergent-divergent nozzle, a series of holes, slits or other structure designed to disperse the melt 134 into the chamber 108 in a desired manner.
  • a divergent nozzle 136 is shown in the illustrated embodiment of the discharge section 106 of the apparatus 100 shown in FIGS. 1 and 4, a divergent nozzle 136 is shown. This nozzle 136 atomizes and disperses the melt 134 as it enters the splat cooling chamber 108.
  • the driving force on the melt 134 passing into the splat cooling chamber 108 via the device 106 is the differential pressure on the melt 134 due to the height of the melt 134 within the accumulator chamber 130.
  • this level of melt 134 must be tightly controlled to remain within a narrow band as mentioned above. It is this narrow level band that establishes the differential pressure required and essentially controls the operational sequencing of valves 1 12, 1 14 and 1 16 and hence the throughput of feedstock 126 through the apparatus 100 during steady state operation of the apparatus 100.
  • Use of the differential pressure to maintain constant flow rate conserves energy and eliminates the need for a high volume gas flow otherwise needed to accelerate the melt 134 into the splat cooling chamber.
  • the splat cooling chamber 138 of cooling section 108 is maintained at the same pressure as the furnace section 104 with the inert gas with additives as above described.
  • the splat cooling chamber 138 houses, in the shown exemplary embodiment 100, a pair of rotating cooling drums 140 or wheels that spin on axles 142.
  • These cooling drums 140 are preferably internally cooled drums with copper exteriors and are spun at a relatively high speed such that the melt 134 that hits the drum surfaces and solidifies is flung off of those surfaces by centrifugal force, resulting in formation of flakes 144 that fall to the conical bottom portion 146 of the chamber 138.
  • the solidification rate can be changed by using drums 140 of appropriate materials in order to produce equilibrium structures can be obtained by using low cooling rates and non-equilibrium structures, such as metallic glasses, super- saturated alloys or matrix structure with high defect densities such as vacancies and dislocation.
  • Collection section 110 includes the bottom portion 146 of the cooling chamber 138, valve 1 18, a collection chamber 148, and valve 120.
  • the purpose of the collection section 1 10 is to receive and collect the solidified product, in this case flakes 144, and transition the content of collection chamber 148 to atmospheric pressure for removal and subsequent processing.
  • valves 1 18 and 120 are closed, and replaces that gas with normal air. While the flakes 144 are in the collection chamber 148, they may be additionally cooled to about normal atmospheric temperature. Valve 120 is then opened to release the product, in this case, accumulated flakes 144.
  • primary control is the rate of flow through the discharge device 106, which necessarily controls the level variation rate of melt 134 in the accumulator chamber 130.
  • the timing is controlled by the level in the accumulator 130 to maintain a constant head or differential pressure on the discharge device 106.
  • the discharge device flow rate controls all the other valve sequences in order to maintain a desired throughput of the apparatus 100.
  • the splat cooler 108 incorporates rotating cooling drums 140. Depending on the product being produced, these drums along with the discharge device 106 may be changed. For example, the discharge device nozzle 136 may be replaced by a convergent nozzle to generate a thin stream of melt and this melt stream passed between rotating cooling spools to form a wire or a sheet product.
  • the above described apparatus and process may be utilized to produce unique microstructures in the product while combining elements with low boiling point and high melting point. Because the pressure head driving the molten metal stream of melt 134 is used to pass the melt into the splat cooling section 108, minimal energy is used, the amount of inert gas is minimized, and chamber volume is minimized. Because it is fully enclosed, process safety is also enhanced. Different product shapes such as rods, sheets, flakes and powders may be produced utilizing the apparatus 100 as above described.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Furnace Details (AREA)

Abstract

L'invention concerne un appareil et un procédé pour la formation continue d'un produit métallique dans lesquels une charge d'alimentation en poudre métallique, sous haute pression pour empêcher l'ébullition d'éléments à bas point d'ébullition, est formée en une masse fondue qui passe ensuite par un orifice technique dans une chambre de trempe en phase liquide pour former une forme de produit solide telle que des flocons, des poudres sphériques, des tiges ou des feuilles.
PCT/US2018/065444 2017-12-14 2018-12-13 Procédé et appareil de fusion et de solidification de métal à haute pression Ceased WO2019118723A1 (fr)

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US201762598589P 2017-12-14 2017-12-14
US62/598,589 2017-12-14

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WO2019118723A1 true WO2019118723A1 (fr) 2019-06-20

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111761069A (zh) * 2020-09-01 2020-10-13 西安赛隆金属材料有限责任公司 一种制粉设备及方法
EP4368318A1 (fr) * 2022-11-09 2024-05-15 GfE Metalle und Materialien GmbH Dispositif et procédé pour réduire un courant de fusion au moyen d'un gaz d'échappement

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4428894A (en) * 1979-12-21 1984-01-31 Extramet Method of production of metallic granules, products obtained and a device for the application of the said method
WO1986006013A1 (fr) * 1985-04-16 1986-10-23 Battelle Memorial Institute Procede de fabrication de poudres metalliques
US5024695A (en) * 1984-07-26 1991-06-18 Ultrafine Powder Technology, Inc. Fine hollow particles of metals and metal alloys and their production
JP2674053B2 (ja) * 1988-01-25 1997-11-05 三菱マテリアル株式会社 金属粒連続製造装置
US20030156964A1 (en) * 2000-06-26 2003-08-21 Masami Kikuchi Method and apparatus for producing magnetic rare earth alloy powder, method for producing bonded magnet, method for producing rare earth sintering magnet, and method and apparatus for improving purity of inert gas

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4428894A (en) * 1979-12-21 1984-01-31 Extramet Method of production of metallic granules, products obtained and a device for the application of the said method
US5024695A (en) * 1984-07-26 1991-06-18 Ultrafine Powder Technology, Inc. Fine hollow particles of metals and metal alloys and their production
WO1986006013A1 (fr) * 1985-04-16 1986-10-23 Battelle Memorial Institute Procede de fabrication de poudres metalliques
JP2674053B2 (ja) * 1988-01-25 1997-11-05 三菱マテリアル株式会社 金属粒連続製造装置
US20030156964A1 (en) * 2000-06-26 2003-08-21 Masami Kikuchi Method and apparatus for producing magnetic rare earth alloy powder, method for producing bonded magnet, method for producing rare earth sintering magnet, and method and apparatus for improving purity of inert gas

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111761069A (zh) * 2020-09-01 2020-10-13 西安赛隆金属材料有限责任公司 一种制粉设备及方法
EP4368318A1 (fr) * 2022-11-09 2024-05-15 GfE Metalle und Materialien GmbH Dispositif et procédé pour réduire un courant de fusion au moyen d'un gaz d'échappement

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