EP0055827B1 - Creuset extracteur de chaleur pour la coulée à solidification rapide d'alliages métalliques - Google Patents

Creuset extracteur de chaleur pour la coulée à solidification rapide d'alliages métalliques Download PDF

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Publication number
EP0055827B1
EP0055827B1 EP81109774A EP81109774A EP0055827B1 EP 0055827 B1 EP0055827 B1 EP 0055827B1 EP 81109774 A EP81109774 A EP 81109774A EP 81109774 A EP81109774 A EP 81109774A EP 0055827 B1 EP0055827 B1 EP 0055827B1
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EP
European Patent Office
Prior art keywords
crucible
melt
molten metal
metal
nozzle
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.)
Expired
Application number
EP81109774A
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German (de)
English (en)
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EP0055827A1 (fr
Inventor
Ray Ranjan
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.)
Allied Corp
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Allied Corp
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Filing date
Publication date
Application filed by Allied Corp filed Critical Allied Corp
Publication of EP0055827A1 publication Critical patent/EP0055827A1/fr
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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/005—Continuous casting of metals, i.e. casting in indefinite lengths of wire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0611—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a single casting wheel, e.g. for casting amorphous metal strips or wires
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/08—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like for bottom pouring

Definitions

  • the present invention relates to an apparatus for rapid solidification casting of high temperature and/or reactive metallic alloys.
  • Melt-spinning is one well established rapid solidification technique which has frequently been used to cast amorphous metal ribbons.
  • a stable liquid jet of molten material is formed by ejection of the liquid through an appropriate orifice or nozzle, and then the jet of molten material is solidified on a moving heat sink.
  • This technique is further described on pages 13 through 17 of a technical report, AFMR-TR-78-70 entitled "Amorphous Glassy Metals and Microcrystalline Alloys for Aerospace Applications" by E. W. Collings, R. E. Maringer, and C. E. Mobley.
  • the FR-A-2 410 368 discloses an apparatus for casting metal filaments directly from the melt comprising a crucible with means for supplying heat to melt the metal, with a nozzle with a chill wheel and with means for controlling the ejection of the molten metal. Because of the interaction between the melt and the crucible it cannot be used to cast high temperature and/or reactive metallic alloys.
  • GB-A-1,517,283 discloses the use of a water-cooled crucible for melting and containing nickel-base alloys. The metal is removed from the crucible by spinning the crucible about its axis to generate atomized particles of liquid which move out radially from the edge of the crucible. This patent offers no teaching that the metal can be extracted from the crucible through an orifice of limited dimensions.
  • GB-A-1,428,691 discloses melting materials in water-cooled molds. The melt is then solidified in situ. Again, this patent offers no teaching of a technique for the extraction of liquid metal from a water-cooled mold through a constricted orifice. Thus, while the above examples show a method for melting materials in water-cooled crucibles, they provide no teachings of the use of these crucibles for melt-spinning.
  • Figure 2 of GB-A-903,530 in combination with page 1 line 87 to page 2 line 8, discloses a crucible, parts of which are water- cooled to form a deposit of semi-solidified melt, but the problem of the invention, that an interaction between the crucible and the melt is avoided, is not solved by GB-A-903,530 since there only parts of the crucible are covered with semi-solid, spongy metal of the melt-with the purpose to serve as a valve seat for the valve stem-whereas the liner of the crucible is not protected with such a deposit of solidified material of the melt so that the melt could interact with the liner.
  • the objective on which the invention is based is to provide an apparatus suitable for casting metal filaments or powders directly from the melt, but preventing interaction between the melt and the crucible.
  • the apparatus comprises a crucible which is constructed of thermally conductive material for holding a metal charge, means for supplying heat to melt the metal charge contained in said crucible to form a melt of molten metal, a nozzle forming an integral part of said crucible for ejection of a stream of molten metal, means for rapidly quenching the stream of molten metal and means for controlling the ejection of the molten metal, and is characterized in that one or more cooling passages are arranged internal to said crucible for passing a cooling medium therethrough to provide a solidified layer of the melt for preventing interaction between the melt and said crucible.
  • a heat extracting crucible 2 is employed for containing molten metal 4.
  • a nozzle 6 is attached to heat extracting crucible 2 and forms an integral part thereof.
  • the heat extracting crucible 2 and the nozzle 6, are preferably made of a high conductivity material such as copper, brass or graphite.
  • the crucible has a channel 8 for the passage of water therethrough.
  • the water inlet 10 and outlet 12 allow the water to flow through the channel 8.
  • the molten metal 4 is ejected through the nozzle 6.
  • the flow of the molten metal 4 is controlled by a shutter 14.
  • the shutter is guided by a track 15.
  • Heat is supplied to melt a metal charge and/or to the molten metal 4 by an arc 16 which is struck between an electrode 18 and the charge of the molten metal 4.
  • the electrode 18 is attached to an electrode holder 20 which is water-cooled.
  • a potential is supplied by voltage supply 22 between the electrode holder 20 and the heat extracting crucible 2. It should be appreciated that other heating means such as an e-beam or a laser beam could be employed to supply heat to the molten metal 4.
  • the heat extracting crucible 2 has a crucible cover 24 attached thereto.
  • the crucible 2 and the crucible cover 24 form a chamber 25 which provides control of the atmosphere over the molten metal 4.
  • the crucible cover 24 has sidewalls 26 which are watercooled by cooling coils 28.
  • the crucible cover 24 has a removable top 30.
  • the top 30 is connected to the sidewalls 26 via a flange 32.
  • Electrode holder 20 passes through the removable top 30 and is electrically insulated from the top by seal 34.
  • a gas outlet 36 in the removable top 30 is connected to a two-way valve 38. The valve 38 in one position allows gas to be evacuated from the chamber 25 by a vacuum pump not shown and in the second position allows an inert atmosphere such as argon to be supplied to the chamber 25.
  • Fig. 2 is a schematic representation of the molten metal supply of Fig. 1 used in combination with a rotating chill wheel 40 having a circumferential edge 42.
  • the chill wheel 40 is rotated by a motor 44.
  • the heat extracting crucible 2 may be positioned relative to the chill wheel 40 by two orthogonal slide mechanisms 46 and 48.
  • the shutter 14 is opened by the shutter release 50.
  • a second chamber 52 encloses the chill wheel 40 and the heat extracting crucible 2, as is illustrated in Figure 3.
  • the electrode holder 20 passes through the removable top 30 of the melt chamber 25.
  • the removable top 30 also serves as the top of the second chamber 52.
  • the removable top 30 has an inlet 56 for evacuating the melt chamber and a valve 58 to block the inlet 56.
  • an outlet 60 having a valve 62 is used to provide a controlled atmosphere by the inlet of a gas such as argon.
  • Inlet 64 and outlet 67 respectively allow evacuation and refilling of the second chamber 52 with a gas such as argon.
  • the valves 66 and 68 control the flow of gas respectively through the inlet 64 and outlet 67.
  • a shutter 14 it is possible to use other means to constrain the flow of molten material through the nozzle 6.
  • One such other means would be to place a small plug of low melting material in the nozzle 6. As the melt reaches temperature, the low melting material would soften; and when the argon pressure is increased in the melt chamber 25, the plug would be dislodged from the nozzle 6, and a stream would flow through the nozzle 6.
  • FIG. 4 Another means to control the ejection of a molten material is illustrated in Fig. 4.
  • a water- cooled stopper rod 70 is employed to block the passage of the nozzle 6.
  • the stream can be rapidly quenched by impinging the stream with a jet of gas 78 from a gas nozzle 80 thereby atomizing the stream and promoting its cooling to form a rapidly-cooled powder product.
  • An insulating nozzle sleeve 72 lines the nozzle 6.
  • the nozzle sleeve 72 may be heated by an induction coil 74 in the event that the nozzle sleeve is coupleable to the magnetic field of the induction coil, or alternatively a graphite susceptor 76 may be contacted to the nozzle sleeve, spare and heat induced into the graphite susceptor 76.
  • two electrodes are employed.
  • the electrodes 18 are held in electrode holders 20, and mounted through the removable top 30 by pivotable sealed joints 77.
  • a voltage from a supply (not shown) is applied between the two electrode holders.
  • An arc is struck between the electrodes 18 and the molten material 4.
  • the melt was ejected through the nozzle by sliding away the shutter while increasing the pressure in the furnace by about 10 cm of mercury.
  • Typical orifice sizes for the nozzle were between about 0.06 inch (0.15cm) and 0.1 inch (0.25 cm). The lower limit assures that it is possible to maintain a stream which does not chokeoff, while the upper limit assures the flow will be sufficiently restrained to establish a filament of uniform cross-section.

Claims (6)

1. Appareil pour réaliser la solidification rapide d'un métal fondu comprenant un creuset (2) construit en un matériau conducteur de la chaleur destiné à recevoir une charge de métal, des moyens (18) pour fournir de la chaleur pour fondre le charge de métal contenue dans ledit creuset pour y former un bain de métal fondu (4), une tuyère (6) formant partie intégrante dudit creuset (2) utilisée pour l'éjection d'un courant de métal de métal fondu, des moyens (42, 80) pour refroidir rapidement le courant de métal fondu et des moyens (14, 70) pour contrôler l'éjection de ce métal fondu, caractérisé en ce qu'un ou plusieurs passage(s) (8) de refroidissement sont disposées à l'intérieur dudit creuset pour laisser passage à un agent de refroidissement en vue de l'obtention d'une couche solidifiée du bain servant à empêcher une interaction entre le bain et ledit creuset.
2. Appareil selon la revendication 1 dans lequel ledit matériau conducteur de la chaleur est conducteur de l'électricité, lesdits moyens (18) pour fournir de la chaleur pour fondre la charge de métal consistant en une électrode associée audit creuset (2) employée pour amorcer un arc (16) entre ladite électrode et la charge de métal contenue dans ledit creuset; et lesdits moyens (42) utilisés pour refroidir rapidement le courant de métal fondu consistent en une surface de refroidissement fournie par un élément extracteur de chaleur (42) destiné à recevoir un dépôt de métal fondu en vue de son refroidissement à l'état de filaments, associé à des moyens (44) pour faire avancer ladite surface de refroidissement.
3. Appareil selon la revendication 2 dans lequel lesdits moyens (14) pour contrôler l'éjection du courant de métal consistent en un volet obturateur qui, lorsqu'il est fermé, bloque l'écoulement de métal à travers ladite tuyère et un couvercle (24) de creuset étanche pour constituer une chambre de creuset (25), en vue de contrôler la pression dans la chambre de fusion, réalisant ainsi un moyen pour accroître la pression hydrostatique sur le bain pour favoriser l'éjection du métal fondu à travers ladite tuyère.
4. Appareil selon la revendication 3 dans lequel ladite tuyère (2) a un diamètre interne compris entre environ 0,25 cm et 0,15 cm.
5. Appareil selon la revendication 3 dans lequel ladite tuyère (2) comporte une pièce d'insertion isolante traversée par un passage, ledit passage ayant un diamètre compris entre environ 0,25 cm et 0,15 cm.
6. Appareil selon la revendication 1 dans lequel le matériau conducteur de la chaleur est également conducteur de l'électricité, lesdits moyens (18) pour fournir de la chaleur pour fondre la charge de métal consistent en au moins deux électrodes associées audit creuset (2) pour amorcer des arcs entre le bain métal fondu et lesdites électrodes, et lesdits moyens (42) pour refroidir rapidement le courant de métal fondu consistent en une surface de refroidissement formée par un élément (40) extracteur de chaleur prévu pour recevoir le dépôt de métal fondu en vue de son refroidissement sous forme de filaments, en association avec des moyens (44) pour faire avancer ladite surface de refroidissement.
EP81109774A 1980-12-29 1981-11-19 Creuset extracteur de chaleur pour la coulée à solidification rapide d'alliages métalliques Expired EP0055827B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US22040180A 1980-12-29 1980-12-29
US220401 1980-12-29

Publications (2)

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EP0055827A1 EP0055827A1 (fr) 1982-07-14
EP0055827B1 true EP0055827B1 (fr) 1985-01-30

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EP81109774A Expired EP0055827B1 (fr) 1980-12-29 1981-11-19 Creuset extracteur de chaleur pour la coulée à solidification rapide d'alliages métalliques

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EP (1) EP0055827B1 (fr)
JP (1) JPS57134251A (fr)
DE (1) DE3168700D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3220332A1 (de) * 1982-05-28 1983-12-01 Hitachi Metals, Ltd., Tokyo Verfahren zur herstellung eines legierungsmaterials

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0095298A1 (fr) * 1982-05-24 1983-11-30 Energy Conversion Devices, Inc. Pièce coulée
JPS6024247A (ja) * 1983-07-18 1985-02-06 Unitika Ltd 液体急冷金属製品の連続製造方法
US4654858A (en) * 1985-04-19 1987-03-31 General Electric Company Cold hearth melting configuration and method
GB8802456D0 (en) * 1988-02-04 1988-03-02 British Steel Corp Liquid metal processing
EP0471798B1 (fr) * 1989-05-01 1993-06-23 AlliedSignal Inc. Filature en fusion a fond de moule refroidi par induction d'alliages metalliques reactifs
US5427173A (en) * 1989-05-01 1995-06-27 Alliedsignal Inc. Induction skull melt spinning of reactive metal alloys
JP2815215B2 (ja) * 1990-03-02 1998-10-27 健 増本 非晶質合金固化材の製造方法
DE4129414A1 (de) * 1990-11-13 1993-03-11 Endress Hauser Gmbh Co Verwendung eines speziellen tiegels beim melt-spinning einer aktivlot-legierung
FR2676946A1 (fr) * 1991-05-27 1992-12-04 Michelin & Cie Procede et dispositif pour obtenir un fil en alliage metallique amorphe a base de fer.
FR2716129A1 (fr) * 1994-02-14 1995-08-18 Unimetall Sa Réservoir de métal liquide pour une installation de coulée continue de fils métalliques très minces.
US8151865B1 (en) * 2011-03-30 2012-04-10 General Electric Company Method and apparatus for casting filaments
EP3141320A1 (fr) * 2015-09-11 2017-03-15 Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. Appareil et procédé de fabrication de fibres métalliques ou inorganiques ayant une épaisseur dans la gamme micrométrique par filage par fusion
CN117020141B (zh) * 2023-08-24 2024-02-02 辽宁同新新材料科技有限公司 一种非晶制带机中的输料方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1428691A (en) * 1972-08-29 1976-03-17 Maschf Augsburg Nuernberg Ag Method of providing an elongate metal member with an integral portion
GB1517283A (en) * 1974-06-28 1978-07-12 Singer Alec Production of metal articles

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3028874A (en) * 1959-11-02 1962-04-10 Dow Chemical Co Valve
US4077462A (en) * 1976-06-30 1978-03-07 Allied Chemical Corporation Chill roll casting of continuous filament
JPS5474698A (en) * 1977-11-28 1979-06-14 Univ Tohoku Superconductive thin band and method of fabricating same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1428691A (en) * 1972-08-29 1976-03-17 Maschf Augsburg Nuernberg Ag Method of providing an elongate metal member with an integral portion
GB1517283A (en) * 1974-06-28 1978-07-12 Singer Alec Production of metal articles

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Technical Report AFMR-TR-78-70 "Amorphous Glassy Metals and Microcrystalline Alloys For Aerospace Applications", pages 13 to 17 by E.W. Collings R.E. Maringerl, C.E. Mobley *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3220332A1 (de) * 1982-05-28 1983-12-01 Hitachi Metals, Ltd., Tokyo Verfahren zur herstellung eines legierungsmaterials

Also Published As

Publication number Publication date
JPS57134251A (en) 1982-08-19
EP0055827A1 (fr) 1982-07-14
DE3168700D1 (en) 1985-03-14

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