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EP0667199A1 - Verfahren und Vorrichtung zum kontinuierlichen Giessen von Metallfilamenten direkt aus der Schmelze - Google Patents

Verfahren und Vorrichtung zum kontinuierlichen Giessen von Metallfilamenten direkt aus der Schmelze Download PDF

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Publication number
EP0667199A1
EP0667199A1 EP95400272A EP95400272A EP0667199A1 EP 0667199 A1 EP0667199 A1 EP 0667199A1 EP 95400272 A EP95400272 A EP 95400272A EP 95400272 A EP95400272 A EP 95400272A EP 0667199 A1 EP0667199 A1 EP 0667199A1
Authority
EP
European Patent Office
Prior art keywords
metal
tank
liquid
liquid metal
casting
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.)
Withdrawn
Application number
EP95400272A
Other languages
English (en)
French (fr)
Inventor
François Stouvenot
Christian Gatellier
Florence Bertrand
James Naylor
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.)
Unimetal SA
Original Assignee
Unimetal SA
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 Unimetal SA filed Critical Unimetal SA
Publication of EP0667199A1 publication Critical patent/EP0667199A1/de
Withdrawn legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0611Continuous 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
    • B22D11/062Continuous 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 the metal being cast on the inside surface of the casting wheel
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/005Continuous casting of metals, i.e. casting in indefinite lengths of wire
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0637Accessories therefor
    • B22D11/064Accessories therefor for supplying molten metal

Definitions

  • the present invention relates to the field of continuous casting of wires of very small diameter, or filaments, obtained directly from liquid metal.
  • This jet of metal then penetrates into a layer of cooling liquid, such as water or an aqueous solution of a salt which can be, for example, sodium chloride, magnesium or zinc, and which ensures solidification. metallic filament.
  • a layer of cooling liquid such as water or an aqueous solution of a salt which can be, for example, sodium chloride, magnesium or zinc, and which ensures solidification. metallic filament.
  • This layer of liquid is moving in a direction transverse to that of the metal jet. It flows on a solid surface which communicates its own movement to it, and which consists of the inside of a drum rotating around a horizontal axis.
  • the liquid metal reservoir is inscribed in the hollowed-out central part of the drum.
  • the filament as it is poured, is wound inside the drum under the effect of centrifugal force, or is extracted from the drum and wound outside of it as and when its formation.
  • RWS Rotating Water Spinning
  • water wheel This process is often referred to as “Rotating Water Spinning” (RWS), or “water wheel”. Thanks to the high cooling speed which it provides, it makes it possible, for certain alloy compositions, to obtain amorphous filaments of uniform size having, inter alia properties, very high tensile strength. It is thus possible to cast amorphous filaments in alloys based on various metals such as iron, copper, cobalt, gold, aluminum, etc.
  • the object of the invention is to provide a device for direct continuous casting of a thin metallic filament from a jet of liquid metal, based on the principle of the "water wheel", and allowing the uninterrupted casting of very long filament lengths.
  • the subject of the invention is a process for the continuous casting of metallic filaments directly from liquid metal, according to which said liquid metal is made to flow out of a tank made of heated refractory material and put under pressure by forming a jet of liquid metal with a diameter equal to or slightly greater than that of the filament to be cast, and said jet is made to solidify by making it penetrate a layer of cooling liquid in motion deposited on the internal wall of a drum rotating around 'A horizontal axis, characterized in that said tank is supplied with solid metal without interrupting the pouring, and in that the fusion of said solid metal is carried out inside said tank.
  • the invention also relates to a device for the continuous casting of metallic filaments of very small diameter directly from liquid metal, of the type comprising a drum provided with means for rotating it around a horizontal axis, a layer of a cooling liquid deposited on the interior surface of said drum, a tank made of a refractory material, containing said liquid metal and provided with an outlet orifice overhanging said layer of cooling liquid, means ensuring the melting and heating of said liquid metal and of means for introducing a neutral gas under pressure into said tank, characterized in that it comprises a pressure container containing said metal in the solid state in divided form, and means for supplying said reservoir with said solid metal without interrupting the casting.
  • the invention consists in carrying out solid metal loading of the reservoir continuously or intermittently by means of a device introducing said solid metal into it in divided form, that is to say of powder or granules , and not requiring the stopping of the casting to carry out this loading.
  • the solid metal added melts during its introduction into the liquid metal already present in the tank, and it is thus possible to permanently keep a given quantity of liquid metal in the tank, and to ensure lasting stable operating conditions of the device.
  • the device for direct casting of thin filament shown in the single figure comprises, in a known manner, a casting drum 1.
  • This drum 1 is presented as a cylinder whose diameter is of the order of 500 to 700 mm, and whose l he longitudinal axis is kept horizontal.
  • One of the flat inner faces of this cylinder constitutes the bottom 2 of the drum 1 and carries a shaft 28 centered on the longitudinal axis of the drum 1.
  • This shaft 28 is connected to conventional means not shown which can ensure its rotation at determined speeds (of the order of 300 rpm).
  • the opposite flat face of the drum 1 is hollowed out over most of its surface, so as to leave only a portion in a crown 3 which, with the bottom 2 and the inner surface 4 (generally cylindrical) of the drum 1, defines a receptacle for the cooling fluid.
  • the fluid which has been previously deposited in this receptacle (or introduced once the rotation of the drum 1 has been carried out) is driven at a speed substantially equal to that of the internal surface 4 of the drum 1. It forms a layer 5 of thickness around 10 to 20 mm around the entire inner periphery of the drum 1.
  • a reservoir 6 made of refractory material (for example quartz, or alumina) intended to contain the liquid metal 7 to be poured is placed inside the drum 1. It is provided with a lower orifice 8 of diameter equal or slightly higher than that of the filament that we want to cast.
  • a heating device for example comprising an induction coil 9 surrounding the reservoir 6, melts the metal and maintains it at the target temperature, and causes within it slight agitation favorable to its chemical and thermal homogeneity.
  • a pipe 10, connected to the sealed cover 11 which covers the tank 6, ensures the introduction of a neutral gas into the tank 6 from a source not shown.
  • this gas The role of this gas is to create in the tank 6 a non-polluting atmosphere for the liquid metal 7 (essentially free of oxygen), and to create an overpressure (of the order of 3 to 10 bars) allowing the flow of the metal. liquid 7 through the orifice 8.
  • This flow causes the formation of a jet 12 of liquid metal which penetrates into the layer 5 of cooling liquid. It solidifies there to form a filament 13 of very small diameter and possibly of amorphous structure, if the nature of the metal and its cooling rate allow it.
  • This filament 13 is entrained by the cooling liquid 5 and is wound inside the drum 1 (some turns already formed have been shown in FIG. 1), unless a device of a type known in it - even does not continuously ensure the extraction and winding of the filament out of the drum 1.
  • the metal is introduced before casting in solid form (powder, ingots, granules, etc.) into the tank 6 which is then closed.
  • the heating device 9 ensures the melting of this metal and the carries, in the liquid state, to the desired temperature.
  • the gas overpressure is applied to the metal bath in the tank 6, the lower orifice 8 of the tank 6 is opened and the casting begins. It continues until the tank 6 is more or less completely drained, then it must be interrupted for the tank 6 to recharge.
  • the supply of solid metal to the reservoir 6 is carried out as follows.
  • the metal to be cast 14 is stored in the solid state, in divided form, that is to say powder or granules with a diameter of the order of 0.1 to 5 mm, in a closed container 15
  • This container 15 is maintained at a pressure equal to that prevailing in the tank 6 of liquid metal 7.
  • a reserve of neutral gas 16 is connected by a pipe 17 and a valve 18.
  • This reserve 16 can also constitute the neutral gas source which pressurizes the liquid metal tank 6.
  • the container 15 is crossed by a horizontal or possibly oblique Archimedes screw 20, driven in rotation at a speed adjustable at will by the operator, thanks to a motor 21.
  • the direction of rotation of the Archimedes screw 20 is chosen such that it causes the extraction of the powder or granules of solid metal 14 from the container 15.
  • the tube 22 is connected at its other end, also in leaktight manner, to the cover 11 of the liquid metal tank 6, and the Archimedes screw 20 opens out inside said tank 6. It thus makes it possible to bring the powder or the solid metal granules 14 inside the tank 6.
  • the solid metal 14 falls into the liquid metal 7 where it melts, and thus contributes to maintaining permanently (if the addition is continuous) or to bring (if the addition is intermittent) the quantity of liquid metal 7 contained in tank 6 at the desired value.
  • the flow of solid metal 14 entering the reservoir 6 can be easily adjusted by varying the speed of rotation of the Archimedes screw 20, after it has been determined experimentally, for a solid metal 14 of given nature and particle size , at what speed corresponds what flow.
  • the container 15 can itself be supplied with solid metal 14 discontinuously from a second container 23 under atmospheric pressure.
  • These two containers 15 and 23 are separated by an airlock 24 which allows, thanks to its two upper 25 and lower 26 sealed valves, to supply the container 15 without excessively disturbing the establishment of the overpressure necessary for the operation of the installation.
  • the solid metal 14 cannot be perfectly clean, and always contains a greater or lesser amount of non-metallic impurities, such as oxide inclusions. These impurities, after the metal 14 has melted, generally decant on the surface of the liquid metal 7 contained in the tank 6. If their composition is unfavorable and gives them a melting temperature higher than that of the liquid metal 7, they gradually form a solid crust of increasing thickness on the surface of the liquid metal 7. This crust may end up constituting a serious hindrance to the introduction of the powder or granules of solid metal 14 into the liquid metal 7.
  • a layer of slag 27 of a composition such that it remains in the liquid state at the treatment temperature, even when it combines with settled non-metallic impurities.
  • the slag added is a slag saturated with silica and containing boron oxides.
  • this layer of slag 27 can be to introduce into the tank 6, at the same time as the initial charge of solid metal 14, the quantity of slag 27 which is estimated in advance sufficient to absorb and make liquid all the non-metallic impurities which will settle there during the entire casting. But there is a risk that this quantity turns out to be insufficient, and that before the end of the casting, the slag 27 ends up being saturated with impurities and solidifies.
  • the latter solution is advantageous in that it makes it possible to continuously adjust the quantity of new slag added according to real needs, and not only according to needs estimated from previous experiences. To this end, the real needs for new slag can be evaluated in particular by visually checking the more or less liquid or solid state of the slag layer 27.
  • the slag introduced is withdrawn in a mixing chamber, itself connected to hoppers each containing one of the constituents of this slag, constituents of which it is thus possible to adjust the respective proportions according to the needs of the moment.
  • the invention is not limited to the example which has been described and shown.
  • any device for supplying the tank 6 with solid metal 14 can be used, and not just an Archimedes screw.
  • the Archimedes screw has the advantages that it provides great ease of adjustment and good reproducibility of the flow of solid metal 14, that it is of simple construction, and that, therefore, it has great reliability in its operation.
  • the invention can be used for the direct casting of filaments of all ferrous or non-ferrous metal alloys initially in divided form.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP95400272A 1994-02-14 1995-02-10 Verfahren und Vorrichtung zum kontinuierlichen Giessen von Metallfilamenten direkt aus der Schmelze Withdrawn EP0667199A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9401797A FR2716130B1 (fr) 1994-02-14 1994-02-14 Procédé et dispositif de coulée continue de fils métalliques de très faible diamètre directement à partir de métal liquide.
FR9401797 1994-02-14

Publications (1)

Publication Number Publication Date
EP0667199A1 true EP0667199A1 (de) 1995-08-16

Family

ID=9460168

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95400272A Withdrawn EP0667199A1 (de) 1994-02-14 1995-02-10 Verfahren und Vorrichtung zum kontinuierlichen Giessen von Metallfilamenten direkt aus der Schmelze

Country Status (6)

Country Link
US (1) US5524704A (de)
EP (1) EP0667199A1 (de)
JP (1) JPH0833955A (de)
BR (1) BR9500619A (de)
CA (1) CA2142420A1 (de)
FR (1) FR2716130B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1799378A1 (de) * 2004-10-15 2007-06-27 Commissariat A L'energie Atomique Verfahren und vorrichtung zur kontinuierlichen herstellung von mit glas überzogenen metalldrähten durch zuführen von metallpartikeln

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1011478A3 (nl) 1997-10-02 1999-10-05 Bekaert Sa Nv Brandermembraan omvattende een vernaald metaalvezelvlies.
FR2792394B1 (fr) 1999-04-16 2001-07-27 Gaz De France Procede pour realiser une surface d'accrochage de flammes
DE10312734B4 (de) * 2003-03-21 2007-04-12 Sächsisches Textilforschungsinstitut e.V. Verfahren und Vorrichtung zur Herstellung eines Metallvliesstoffes
DE10316259A1 (de) * 2003-04-08 2004-10-28 Fleissner Gmbh Verfahren zur Verfestigung oder Veredelung einer Warenbahn mittels der hydrodynamischen Vernadelung und Produkt nach diesem Verfahren
DE202012008505U1 (de) 2012-09-06 2012-12-07 Anke Hestermann de Boer Magnetischer Strahlungs-Absorber
CN113840471B (zh) * 2020-06-23 2023-05-09 哈尔滨工业大学(深圳)(哈尔滨工业大学深圳科技创新研究院) 一种制备柔性电子的方法及柔性电子
KR102499091B1 (ko) * 2021-01-28 2023-02-15 한국생산기술연구원 원심주조를 통한 우수한 냉각능을 가질 수 있는 와이어 제조 장치 및 제조 방법
KR102456442B1 (ko) * 2021-01-28 2022-10-21 한국생산기술연구원 원심주조를 통한 우수한 냉각능을 가질 수 있는 리본 제조 장치 및 제조 방법
CN114932210B (zh) * 2022-06-21 2023-12-26 贵州华昌群建模塑有限公司 汽车高强度模具速冷装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0039169A2 (de) * 1980-04-17 1981-11-04 Tsuyoshi Masumoto Amorphe Metallfasern und dazugehöriges Herstellungsverfahren
EP0089134A1 (de) * 1982-03-03 1983-09-21 Unitika Ltd. Verfahren zur Herstellung von dünnem Metalldraht
JPS6087952A (ja) * 1983-10-17 1985-05-17 Sumitomo Electric Ind Ltd 細物Cu−Cr系合金線の製造方法
JPS62286652A (ja) * 1986-06-05 1987-12-12 Kobe Steel Ltd 金属細線の製造装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL103600C (de) * 1956-07-27 1900-01-01
US4184532A (en) * 1976-05-04 1980-01-22 Allied Chemical Corporation Chill roll casting of continuous filament
US4741384A (en) * 1982-01-07 1988-05-03 Gte Products Corporation Apparatus for melting, casting and discharging a charge of metal
JPS6021162A (ja) * 1983-07-18 1985-02-02 Kawasaki Steel Corp 急冷直接製線法および装置
JPS61262451A (ja) * 1985-05-15 1986-11-20 Unitika Ltd 金属細線の連続製造装置
JPH01309766A (ja) * 1988-06-09 1989-12-14 Furukawa Electric Co Ltd:The 鋳塊の製造方法とその装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0039169A2 (de) * 1980-04-17 1981-11-04 Tsuyoshi Masumoto Amorphe Metallfasern und dazugehöriges Herstellungsverfahren
EP0089134A1 (de) * 1982-03-03 1983-09-21 Unitika Ltd. Verfahren zur Herstellung von dünnem Metalldraht
JPS6087952A (ja) * 1983-10-17 1985-05-17 Sumitomo Electric Ind Ltd 細物Cu−Cr系合金線の製造方法
JPS62286652A (ja) * 1986-06-05 1987-12-12 Kobe Steel Ltd 金属細線の製造装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 12, no. 171 (M - 700)<3018> 21 May 1988 (1988-05-21) *
PATENT ABSTRACTS OF JAPAN vol. 9, no. 231 (M - 414)<1954> 18 September 1985 (1985-09-18) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1799378A1 (de) * 2004-10-15 2007-06-27 Commissariat A L'energie Atomique Verfahren und vorrichtung zur kontinuierlichen herstellung von mit glas überzogenen metalldrähten durch zuführen von metallpartikeln

Also Published As

Publication number Publication date
BR9500619A (pt) 1995-10-17
CA2142420A1 (fr) 1995-08-15
FR2716130B1 (fr) 1996-04-05
JPH0833955A (ja) 1996-02-06
US5524704A (en) 1996-06-11
FR2716130A1 (fr) 1995-08-18

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