EP0378036A1 - Method and apparatus for continuously casting thin metal wire - Google Patents

Method and apparatus for continuously casting thin metal wire Download PDF

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Publication number
EP0378036A1
EP0378036A1 EP89470027A EP89470027A EP0378036A1 EP 0378036 A1 EP0378036 A1 EP 0378036A1 EP 89470027 A EP89470027 A EP 89470027A EP 89470027 A EP89470027 A EP 89470027A EP 0378036 A1 EP0378036 A1 EP 0378036A1
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EP
European Patent Office
Prior art keywords
liquid
metal
cooling liquid
grid
jet
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Granted
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EP89470027A
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German (de)
French (fr)
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EP0378036B1 (en
Inventor
Didier Huin
Paul-Victor Riboud
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Unimetal SA
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Institut de Recherches de la Siderurgie Francaise IRSID
Unimetal SA
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Priority to AT89470027T priority Critical patent/ATE87517T1/en
Publication of EP0378036A1 publication Critical patent/EP0378036A1/en
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    • 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
    • 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

Definitions

  • the present invention relates to the field of direct casting of thin wires from liquid metal.
  • the wire as it is poured, is wound inside the drum under the effect of centrifugal force, or wound outside the casting machine.
  • this process makes it possible, if the metal is amorphizable, to obtain amorphous wires of uniform size having, among other properties, a very high tensile strength.
  • We can thus cast amorphous wires in alloys based on various metals such as iron, copper, cobalt, gold, aluminum, etc.
  • one of the conditions necessary for obtaining a continuous wire of regular diameter is that the flow regime of the cooling liquid, upon contact with the metal jet, is as close as possible to flow laminar. Otherwise, the metal jet may be split before it solidifies. We would thus obtain not a continuous thread, but fibers of short length. Consequently, the introduction of the metal jet into the liquid must be carried out at a point sufficiently distant from the outlet of the supply line so that before this point, the turbulence of the liquid has had time to dissipate for a very large share.
  • the object of the present invention is to provide a method of accelerating the dissipation of the turbulence of the cooling liquid. It makes it possible to build installations of reduced dimensions which can massively and reliably produce good quality amorphous wires.
  • the subject of the invention is a process for the continuous casting of a thin metal wire in which a jet of liquid metal is soaked and solidified in a layer of cooling liquid deposited on a moving surface, characterized in that accelerating the dissipation of the turbulence of the cooling liquid upstream of the point of impact of the metal jet on said liquid.
  • the invention also relates to a device for the continuous casting of fine metal wire comprising a reservoir provided with a nozzle through which flows a jet of liquid metal, said reservoir being placed above a moving surface on which is deposited, by means of a supply line, a layer of cooling liquid in which said metal jet is quenched and solidified, device characterized in that, with the aim of accelerating the dissipation of the turbulence of the cooling liquid, it further comprises a fine mesh grid disposed across the layer of cooling liquid between the outlet of said supply pipe and the point of penetration of the metal jet in the layer of cooling liquid.
  • this grid is placed at the end of the supply pipe.
  • this grid is to "chop" the flow of the liquid so as to reduce the size of the turbulence, which facilitates their rapid dissipation.
  • This grid is placed on the path of the cooling liquid between its exit from the pipe and the point of penetration within it of the metal jet.
  • the swirls inside the cooling liquid Before passing through the grid, the swirls inside the cooling liquid have a certain characteristic size. If this characteristic size is greater than the grid mesh, the crossing of the latter splits the vortices into smaller vortices, the size of which is of the order of the grid mesh.
  • the turbulence of a flow decreases all the more quickly the smaller the size of the vortices. Imposing a small size on these vortices as soon as possible (preferably from the outlet of the pipe) by means of the grid therefore makes it possible to advance the transition from a turbulent flow regime of the coolant to a laminar flow regime . In general, the turbulence decreases all the faster the finer the mesh of the grid.
  • the single appended figure shows diagrammatically, seen in longitudinal section, a direct wire casting installation provided with a device according to the invention.
  • This installation is supplied by a reservoir 1 containing the metal to be poured 2 in the liquid state.
  • This tank 1 is provided with means 3 for blowing a neutral gas ensuring on the one hand the protection of the metal 2 against contamination by the atmosphere and on the other hand a pressurization of the tank which contributes to the regulation of the metal flow. It also includes means 4 for heating the liquid metal, and a nozzle 5 through which the metal flows, forming a jet 6. The diameter of this nozzle is equal to or slightly greater than that of the wire which it is desired to run.
  • the nozzle 5 overhangs a conveyor belt 7 provided with a groove (not shown) and the movement of which is ensured by means symbolized by the rotating pulleys 8 and 8 ′.
  • the pipe 9 brings inside the groove of the strip 7 a cooling liquid 10.
  • the grid 11 At the end of this pipe 9 is fixed the grid 11 according to the invention, which has meshes 11 ′.
  • a rectilinear shape is imposed on the strip 7.
  • the jet of metal penetrates into the layer of coolant at point 12 situated above the nozzle 5 Under the action of the liquid and its movement, it solidifies in the form of a continuous wire 13 and takes a curved shape before coming into contact with the strip 7.
  • the installation also includes means (not shown) to pick up and wind the thread after it has left the strip 7.
  • the grid can be placed at the end of the supply pipe, which makes it possible to reduce the turbulence as soon as possible.
  • Such disturbances could be caused by sudden changes in the direction of flow, for example in the area where the liquid comes into contact with the solid moving surface.
  • this arrangement of the grid is preferable only if at the time of this contact, the direction of flow of the liquid, which is imposed by the orientation of the pipe, and the direction of movement of the solid surface are substantially parallel. .
  • the mesh size of the grid is preferably less than 1/10 of the diameter of the supply pipe or, more generally, 1/10 of the thickness of the layer of liquid.
  • the section for the passage of the liquid through the grid must be sufficient to avoid too high pressure drops in the flow of the liquid.
  • the meshes have a size between 0.5 and 10 mm.
  • Adapting such a grid to an existing installation therefore provides the following advantages: - If the operating conditions are not otherwise modified, the reduction in turbulence within the coolant makes the solidification of the metal jet more reliable. - It is also possible to keep the same turbulence as in the absence of a grid, by increasing the speed of movement of the liquid. If, moreover, the speed of the metal jet is unchanged, its solidification is accelerated and the degree of amorphization of the structure of the wire can be increased. If the speed of the metal jet is increased in the same proportion as the speed of the liquid, the productivity of the installation is improved.
  • Another option consists in not modifying the other operating conditions, but in bringing the point of introduction of the metal jet into the liquid and the point of arrival of the cooling liquid closer to the moving surface. It is thus possible, without modifying the quality of the wire and the productivity of the installation, to considerably reduce the size thereof.
  • the invention is not limited to the example which has just been described and shown.
  • the grid is not necessarily fixed to the pipe for supplying the cooling liquid. The main thing is that it is located on the path of the liquid, at a point sufficiently distant from the point of penetration of the metal jet so that, at the latter point, the turbulence of the liquid is significantly attenuated.
  • the invention is applicable to wire casting installations for which the moving surface plumb with the liquid metal reservoir has a curvature whose concavity is oriented towards said reservoir.
  • This type of installation includes in particular those which consist of a rotating drum, the internal surface of which supports the coolant.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Coating With Molten Metal (AREA)
  • Metal Extraction Processes (AREA)
  • Wire Processing (AREA)

Abstract

The invention relates to a method for casting a thin metal wire (13) in which a stream of liquid metal (6) is quenched and solidified in a layer of cooling liquid (10) deposited on a moving surface (7), characterised in that the dissipation of the turbulence of the cooling liquid is accelerated upstream of the point of impact of the stream of metal on the said liquid. <??>The invention also relates to an apparatus for implementing the above method, which apparatus comprises a grid (11) disposed at right angles to the layer of cooling liquid (10), between the exit of the inlet pipe (9) of the cooling liquid (10) on the moving surface (7) and the point of penetration (12) of the stream of metal (6) into the cooling liquid (10). <??>The invention applies to the field of the direct continuous casting of thin metal wires (13). <IMAGE>

Description

La présente invention concerne le domaine de la coulée directe de fils de faible épaisseur à partir de métal liquide.The present invention relates to the field of direct casting of thin wires from liquid metal.

Les dernières années ont vu le développement d'un procédé de coulée permettant d'obtenir, directement à partir de métal liquide, des filaments métalliques de longueur indéfinie, de section substantiellement circulaire et de diamètre très faible, pouvant descendre jusqu'à 80 µm environ. Ce procédé, décrit notamment dans le Brevet Européen EP 0039169, consiste à former un jet de métal à partir d'un réservoir de métal liquide muni de moyens de chauffage et d'une busette de sortie dont le diamètre est égal ou légèrement supérieur au diamètre du filament désiré. Ce jet de métal pénètre ensuite dans une couche de liquide refroidissant, tel que de l'eau ou une solution aqueuse d'un sel qui peut être, par exemple, du chlorure de sodium, de magnésium ou de zinc et qui assure la solidification du fil métallique. Cette couche de liquide est en mouvement dans une direction transversale à celle du jet de métal. Elle s'écoule sur une surface solide elle-même en mouvement, qui peut être constituée par l'intérieur d'un tambour en rotation (Brevet Européen EP 0039169 déjà cité) ou par une portion horizontale ou concave d'une courroie rainurée en défilement formant une boucle (Brevet Européen EP 0089134).The last few years have seen the development of a casting process making it possible to obtain, directly from liquid metal, metallic filaments of indefinite length, of substantially circular section and of very small diameter, which can go down to around 80 µm. . This process, described in particular in European Patent EP 0039169, consists in forming a metal jet from a liquid metal tank provided with heating means and an outlet nozzle whose diameter is equal to or slightly greater than the diameter of the desired filament. This metal jet then penetrates into a layer of cooling liquid, such as water or an aqueous solution of a salt which can be, for example, sodium, magnesium or zinc chloride and which ensures the solidification of the metal wire. This layer of liquid is moving in a direction transverse to that of the metal jet. It flows on a solid surface which is itself in motion, which can be formed by the inside of a rotating drum (European Patent EP 0039169 already cited) or by a horizontal or concave portion of a grooved running belt. forming a loop (European Patent EP 0089134).

Le fil, au fur et à mesure de sa coulée, est enroulé à l'intérieur du tambour sous l'effet de la force centrifuge, ou bobiné à l'extérieur de la machine de coulée.The wire, as it is poured, is wound inside the drum under the effect of centrifugal force, or wound outside the casting machine.

Grâce à la vitesse de refroidissement élevée qu'il procure, ce procédé permet, si le métal est amorphisable, d'obtenir des fils amorphes de dimension uniforme présentant, entre autres propriétés, une résistance à la traction très élevée. On peut ainsi couler des fils amorphes en alliages à base de divers métaux tels que le fer, le cuivre, le cobalt, l'or, l'aluminium, etc.Thanks to the high cooling speed which it provides, this process makes it possible, if the metal is amorphizable, to obtain amorphous wires of uniform size having, among other properties, a very high tensile strength. We can thus cast amorphous wires in alloys based on various metals such as iron, copper, cobalt, gold, aluminum, etc.

Il est connu (EP 0089134) que pour obtenir à cette fin un fil continu et un refroidissement suffisamment rapide du jet de métal, il est préférable que le liquide refroidissant circule à une vitesse supérieure ou égale à celle du jet. Celle-ci étant souvent de l'ordre de 5 à 15 m/s, cela implique que le liquide refroidissant se trouve dans un régime d'écoulement turbulent au moment de son arrivée sur la surface en mouvement.It is known (EP 0089134) that to obtain for this purpose a continuous wire and a sufficiently rapid cooling of the metal jet, it is preferable that the cooling liquid circulates at a speed greater than or equal to that of the jet. This often being of the order of 5 to 15 m / s, this implies that the cooling liquid is in a turbulent flow regime at the time of its arrival on the moving surface.

Or, l'une des conditions nécessaires à l'obtention d'un fil continu de diamètre régulier est que le régime d'écoulement du liquide refroidissant, lors de son contact avec le jet de métal, soit aussi proche que possible d'un écoulement laminaire. Dans le cas contraire, le jet de métal risque d'être fractionné avant sa solidification. On obtiendrait ainsi non pas un fil continu, mais des fibres de faible longueur. En conséquence, l'introduction du jet de métal dans le liquide doit être effectuée en un point suffisamment éloigné de la sortie de la conduite d'amenée pour qu'avant ce point, la turbulence du liquide ait eu le temps de se dissiper pour une très large part.However, one of the conditions necessary for obtaining a continuous wire of regular diameter is that the flow regime of the cooling liquid, upon contact with the metal jet, is as close as possible to flow laminar. Otherwise, the metal jet may be split before it solidifies. We would thus obtain not a continuous thread, but fibers of short length. Consequently, the introduction of the metal jet into the liquid must be carried out at a point sufficiently distant from the outlet of the supply line so that before this point, the turbulence of the liquid has had time to dissipate for a very large share.

Ceci implique soit de construire une installation de grande dimension, soit de n'imprimer au liquide refroidissant qu'une vitesse relativement faible. Mais, dans ces conditions, si la vitesse du jet de métal reste élevée, le refroidissement du jet s'effectue de façon moins énergique, et, d'autre part l'obtention d'un fil continu risque d'être impossible. En revanche, si on choisit d'imposer également au jet de métal une vitesse relativement faible, c'est la productivité de l'installation qui s'en trouve détériorée.This involves either building a large installation or printing the cooling liquid only at a relatively low speed. However, under these conditions, if the speed of the metal jet remains high, the cooling of the jet takes place in a less energetic manner, and, on the other hand, obtaining a continuous wire may be impossible. On the other hand, if one chooses to also impose on the metal jet a relatively low speed, it is the productivity of the installation which is thereby deteriorated.

Le but de la présente invention est de fournir une méthode d'accélération de la dissipation de la turbulence du liquide refroidissant. Elle permet de construire des installations de dimensions réduites pouvant produire de façon massive et fiable des fils amorphes de bonne qualité.The object of the present invention is to provide a method of accelerating the dissipation of the turbulence of the cooling liquid. It makes it possible to build installations of reduced dimensions which can massively and reliably produce good quality amorphous wires.

A cet effet, l'invention a pour objet un procédé de coulée continue d'un fil métallique fin dans lequel un jet de métal liquide est trempé et solidifié dans une couche de liquide refroidissant déposée sur une surface en mouvement, caractérisé en ce qu'on accélère la dissipation de la turbulence du liquide refroidissant en amont du point d'impact du jet de métal sur ledit liquide.To this end, the subject of the invention is a process for the continuous casting of a thin metal wire in which a jet of liquid metal is soaked and solidified in a layer of cooling liquid deposited on a moving surface, characterized in that accelerating the dissipation of the turbulence of the cooling liquid upstream of the point of impact of the metal jet on said liquid.

L'invention a également pour objet un dispositif de coulée continue de fil métallique fin comportant un réservoir muni d'une busette par laquelle s'écoule un jet de métal liquide, ledit réservoir étant placé au-dessus d'une surface en mouvement sur laquelle est déposée, au moyen d'une conduite d'amenée, une couche de liquide refroidissant dans laquelle ledit jet de métal est trempé et solidifié, dispositif caractérisé en ce que, dans le but d'accélerer la dissipation de la turbulence du liquide refroidissant, il comporte en outre une grille à maillage fin disposée en travers de la couche de liquide refroidissant entre la sortie de ladite conduite d'amenée et le point de pénétration du jet de métal dans la couche de liquide refroidissant.The invention also relates to a device for the continuous casting of fine metal wire comprising a reservoir provided with a nozzle through which flows a jet of liquid metal, said reservoir being placed above a moving surface on which is deposited, by means of a supply line, a layer of cooling liquid in which said metal jet is quenched and solidified, device characterized in that, with the aim of accelerating the dissipation of the turbulence of the cooling liquid, it further comprises a fine mesh grid disposed across the layer of cooling liquid between the outlet of said supply pipe and the point of penetration of the metal jet in the layer of cooling liquid.

Préférentiellement, cette grille est placée à l'extrémité de la conduite d'amenée.Preferably, this grid is placed at the end of the supply pipe.

Comme on l'aura compris, le rôle de cette grille est de "hacher" l'écoulement du liquide de façon à diminuer la taille des turbulences, ce qui facilite leur dissipation rapide.As will be understood, the role of this grid is to "chop" the flow of the liquid so as to reduce the size of the turbulence, which facilitates their rapid dissipation.

Cette grille est placée sur la trajectoire du liquide refroidissant entre sa sortie de la conduite et le point de pénétration en son sein du jet de métal. Avant la traversée de la grille, les tourbillons à l'intérieur du liquide refroidissant ont une certaine taille caractéristique. Si cette taille caractéristique est supérieure à la maille de la grille, la traversée de celle-ci fractionne les tourbillons en tourbillons plus petits, dont la taille est de l'ordre de la maille de la grille. Or, la turbulence d'un écoulement diminue d'autant plus rapidement que la taille des tourbillons est plus faible. Imposer dès que possible (préférentiellement dès la sortie de la conduite) une faible taille à ces tourbillons au moyen de la grille permet donc d'avancer le passage d'un régime d'écoulement turbulent du liquide de refroidissement à un régime d'écoulement laminaire. De manière générale, la turbulence diminue d'autant plus vite que la maille de la grille est fine.This grid is placed on the path of the cooling liquid between its exit from the pipe and the point of penetration within it of the metal jet. Before passing through the grid, the swirls inside the cooling liquid have a certain characteristic size. If this characteristic size is greater than the grid mesh, the crossing of the latter splits the vortices into smaller vortices, the size of which is of the order of the grid mesh. However, the turbulence of a flow decreases all the more quickly the smaller the size of the vortices. Imposing a small size on these vortices as soon as possible (preferably from the outlet of the pipe) by means of the grid therefore makes it possible to advance the transition from a turbulent flow regime of the coolant to a laminar flow regime . In general, the turbulence decreases all the faster the finer the mesh of the grid.

La figure unique annexée schématise, vue en coupe longitudinale, une installation de coulée directe de fil munie d'un dispositif selon l'invention.The single appended figure shows diagrammatically, seen in longitudinal section, a direct wire casting installation provided with a device according to the invention.

Cette installation est alimentée par un réservoir 1 contenant le métal à couler 2 à l'état liquide. Ce réservoir 1 est muni de moyens 3 d'insufflation d'un gaz neutre assurant d'une part la protection du métal 2 contre une contamination par l'atmosphère et d'autre part une mise sous pression du réservoir qui contribue à la régulation du débit de métal. Il comporte aussi des moyens 4 de chauffage du métal liquide, et une busette 5 par laquelle s'écoule le métal en formant un jet 6. Le diamètre de cette busette est égal ou légèrement supérieur à celui du fil que l'on désire couler. La busette 5 surplombe une bande transporteuse 7 munie d'une rainure (non représentée) et dont le défilement est assuré par des moyens symbolisés par les poulies en rotation 8 et 8′. La conduite 9 amène à l'intérieur de la rainure de la bande 7 un liquide de refroidissement 10. A L'extrémité de cette conduite 9 est fixée la grille 11 selon l'invention, qui comporte des mailles 11′. Entre l'extrémité de la conduite 9 et un point situé au-delà de l'aplomb du réservoir 1, une forme rectiligne est imposée à la bande 7. Le jet de métal pénètre dans la couche de liquide refroidissant au point 12 situé à l'aplomb de la busette 5. Sous l'action du liquide et de son mouvement, il se solidifie sous forme d'un fil continu 13 et prend une forme incurvée avant d'entrer en contact avec la bande 7. L'installation comporte également des moyens (non représentés) pour capter et bobiner le fil après que celui-ci ait quitté la bande 7.This installation is supplied by a reservoir 1 containing the metal to be poured 2 in the liquid state. This tank 1 is provided with means 3 for blowing a neutral gas ensuring on the one hand the protection of the metal 2 against contamination by the atmosphere and on the other hand a pressurization of the tank which contributes to the regulation of the metal flow. It also includes means 4 for heating the liquid metal, and a nozzle 5 through which the metal flows, forming a jet 6. The diameter of this nozzle is equal to or slightly greater than that of the wire which it is desired to run. The nozzle 5 overhangs a conveyor belt 7 provided with a groove (not shown) and the movement of which is ensured by means symbolized by the rotating pulleys 8 and 8 ′. The pipe 9 brings inside the groove of the strip 7 a cooling liquid 10. At the end of this pipe 9 is fixed the grid 11 according to the invention, which has meshes 11 ′. Between the end of the line 9 and a point situated above the level of the reservoir 1, a rectilinear shape is imposed on the strip 7. The jet of metal penetrates into the layer of coolant at point 12 situated above the nozzle 5 Under the action of the liquid and its movement, it solidifies in the form of a continuous wire 13 and takes a curved shape before coming into contact with the strip 7. The installation also includes means (not shown) to pick up and wind the thread after it has left the strip 7.

Sur cette figure l'évolution de la turbulence au sein du liquide est symbolisée au moyen de flèches indiquant de façon qualitative le nombre et l'ampleur des tourbillons. A l'intérieur de la conduite, ces tourbillons sont nombreux et de grande amplitude. Après la sortie du liquide de la conduite et à la suite de la traversée de la grille, ces tourbillons sont fractionnés en tourbillons de faible amplitude (de l'ordre de la dimension des mailles de la grille). Le nombre et l'amplitude de ces tourbillons diminuent au fur et à mesure de la progression du liquide. Si la portion rectiligne de la bande 7 est suffisamment longue, la turbulence a le temps de se dissiper, et le liquide refroidissant se retrouve dans un régime d'écoulement laminaire symbolisé par les flèches parallèles à la direction de défilement de la bande 7. C'est dans cette zone à écoulement laminaire qu'est effectuée préférentiellement la trempe du jet de métal 6 pour former le fil continu 13.In this figure the evolution of turbulence within the liquid is symbolized by arrows indicating qualitatively the number and extent of the vortices. Inside the pipe, these vortices are numerous and of great amplitude. After the liquid has left the pipe and after passing through the grid, these vortices are split into vortices of small amplitude (of the order of the size of the grid meshes). The number and amplitude of these vortices decrease as the liquid progresses. If the rectilinear portion of the strip 7 is sufficiently long, the turbulence has time to dissipate, and the cooling liquid is found in a laminar flow regime symbolized by the arrows parallel to the direction of travel of the strip 7. C it is in this laminar flow zone that the metal jet 6 is preferably quenched to form the continuous wire 13.

Comme on vient de la voir la grille peut être placée à l'extrémité de la conduite d'amenée ce qui permet d'atténuer la turbulence aussi tôt que possible. Toutefois, si une telle solution est adoptée, il est bien sûr indispensable que le liquide de refroidissement ne subisse pas, par la suite, de perturbations importantes dans son écoulement avant son contact avec le jet de métal. De telles perturbations pourraient être provoquées par de brusques changements de la direction de l'écoulement, par exemple dans la zone où le liquide vient au contact de la surface solide en mouvement. Pratiquement, cette disposition de la grille n'est préférable que si au moment de ce contact, la direction d'écoulement du liquide, qui est imposée par l'orientation de la conduite, et la direction du défilement de la surface solide sont sensiblement parallèles.As we have just seen, the grid can be placed at the end of the supply pipe, which makes it possible to reduce the turbulence as soon as possible. However, if such a solution is adopted, it is of course essential that the coolant does not subsequently undergo significant disturbances in its flow before it comes into contact with the jet of metal. Such disturbances could be caused by sudden changes in the direction of flow, for example in the area where the liquid comes into contact with the solid moving surface. In practice, this arrangement of the grid is preferable only if at the time of this contact, the direction of flow of the liquid, which is imposed by the orientation of the pipe, and the direction of movement of the solid surface are substantially parallel. .

Afin d'obtenir une réduction significative de la taille des tourbillons, la dimension des mailles de la grille est préférentiel­lement inférieure à 1/10 du diamètre de la conduite d'amenée ou, plus généralement, à 1/10 de l'épaisseur de la couche de liquide. D'autre part, la section de passage du liquide à travers la grille doit être suffisante pour éviter des pertes de charge trop élevées dans l'écoulement du liquide. Typiquement, les mailles ont une dimension comprise entre 0,5 et 10 mm.In order to obtain a significant reduction in the size of the vortices, the mesh size of the grid is preferably less than 1/10 of the diameter of the supply pipe or, more generally, 1/10 of the thickness of the layer of liquid. On the other hand, the section for the passage of the liquid through the grid must be sufficient to avoid too high pressure drops in the flow of the liquid. Typically, the meshes have a size between 0.5 and 10 mm.

L'adaptation d'une telle grille sur une installation existante procure donc les avantages suivants :
- si les conditions opératoires ne sont par ailleurs pas modifiées, la diminution de la turbulence au sein du liquide de refroidissement permet de fiabiliser la solidification du jet de métal.
- il est également possible de conserver la même turbulence qu'en l'absence de grille, en augmentant la vitesse de déplacement du liquide. Si, par ailleurs la vitesse du jet de métal est inchangée, sa solidification est accélérée et le degré d'amorphisation de la structure du fil peut s'en trouver accru. Si la vitesse du jet de métal est augmentée dans les mêmes proportions que la vitesse du liquide, c'est la productivité de l'installation qui est améliorée.Adapting such a grid to an existing installation therefore provides the following advantages:
- If the operating conditions are not otherwise modified, the reduction in turbulence within the coolant makes the solidification of the metal jet more reliable.
- It is also possible to keep the same turbulence as in the absence of a grid, by increasing the speed of movement of the liquid. If, moreover, the speed of the metal jet is unchanged, its solidification is accelerated and the degree of amorphization of the structure of the wire can be increased. If the speed of the metal jet is increased in the same proportion as the speed of the liquid, the productivity of the installation is improved.

Une autre option consiste à ne pas modifier les autres conditions opératoires, mais à rapprocher le point d'introduction du jet de métal dans le liquide et le point d'arrivée du liquide refroidissant sur la surface en mouvement. On peut ainsi, sans modifier la qualité du fil et la productivité de l'installation, réduire considérablement l'encombrement de celle-ci.Another option consists in not modifying the other operating conditions, but in bringing the point of introduction of the metal jet into the liquid and the point of arrival of the cooling liquid closer to the moving surface. It is thus possible, without modifying the quality of the wire and the productivity of the installation, to considerably reduce the size thereof.

A titre d'exemple, dans une installation qui serait munie d'une conduite d'amenée du liquide de refroidissement de diamètre 10 mm, et où le liquide se déplacerait à une vitesse de 15 m/s, son régime d'écoulement devient pratiquement laminaire après un parcours de 10 m. Disposer une grille de maille 1 mm à la sortie de la conduite d'amenée permet de ramener cette distance à environ 1 m.For example, in an installation which would be provided with a coolant supply pipe with a diameter of 10 mm, and where the liquid would move at a speed of 15 m / s, its flow regime becomes practically laminar after a 10 m course. Having a 1 mm mesh grid at the outlet of the supply line allows this distance to be reduced to approximately 1 m.

Bien entendu, l'invention n'est pas limitée à l'exemple qui vient d'être décrit et représenté. En particulier, la grille n'est pas obligatoirement fixée à la conduite d'amenée du liquide refroidissant. L'essentiel est qu'elle soit située sur le trajet du liquide, en un point suffisamment éloigné du point de pénétration du jet de métal pour que, en ce dernier point la turbulence du liquide s'en trouve atténuée de façon significative.Of course, the invention is not limited to the example which has just been described and shown. In particular, the grid is not necessarily fixed to the pipe for supplying the cooling liquid. The main thing is that it is located on the path of the liquid, at a point sufficiently distant from the point of penetration of the metal jet so that, at the latter point, the turbulence of the liquid is significantly attenuated.

De même l'invention est applicable aux installations de coulée de fils pour lesquelles la surface en mouvement à l'aplomb du réservoir de métal liquid présente une courbure dont la concavité est orientée vers ledit réservoir. Ce type d'installation comprend notamment celles qui sont constituées par un tambour en rotation, dont la surface interne supporte le liquide de refroidissement.Likewise, the invention is applicable to wire casting installations for which the moving surface plumb with the liquid metal reservoir has a curvature whose concavity is oriented towards said reservoir. This type of installation includes in particular those which consist of a rotating drum, the internal surface of which supports the coolant.

Claims (8)

1) Procédé de coulée continue de fil métallique fin dans lequel un jet de métal liquide est trempé et solidifié dans une couche de liquide refroidissant déposée sur une surface en mouvement, caractérisé en ce qu'on accélère la dissipation de la turbulence du liquide refroidissant en amont du point d'impact du jet de métal sur ledit liquide.1) Process for the continuous casting of fine metallic wire in which a jet of liquid metal is soaked and solidified in a layer of cooling liquid deposited on a moving surface, characterized in that the dissipation of the turbulence of the cooling liquid is accelerated by upstream of the point of impact of the metal jet on said liquid. 2) Dispositif de coulée continue de fil métallique fin comportant un réservoir (1) muni d'une busette (5) par laquelle s'écoule un jet de métal liquide (6), ledit réservoir étant placé au-dessus d'une surface en mouvement sur laquelle est déposée, au moyen d'une conduite d'amenée, une couche de liquide refroidissant dans laquelle ledit jet de métal est trempé et solidifié, dispositif caractérisé en ce que, dans le but d'accélérer la dissipation de la turbulence du liquide refroidissant, il comporte en outre une grille (11) disposée en travers de la couche (10) de liquide refroidissant entre la sortie de ladite conduite d'amenée (9) et le point (12) de pénétration du jet de métal dans ladite couche de liquide refroidissant.2) Device for continuous casting of fine metal wire comprising a reservoir (1) provided with a nozzle (5) through which flows a jet of liquid metal (6), said reservoir being placed above a surface in movement on which is deposited, by means of a supply line, a layer of cooling liquid in which said metal jet is quenched and solidified, device characterized in that, with the aim of accelerating the dissipation of the turbulence of the coolant, it further comprises a grid (11) disposed across the layer (10) of coolant between the outlet of said supply pipe (9) and the point (12) of penetration of the metal jet in said layer of coolant. 3) Dispositif selon la revendication 2, caractérisé en ce que ladite grille est placée à l'extrémité de la conduite d'amenée.3) Device according to claim 2, characterized in that said grid is placed at the end of the supply pipe. 4) Dispositif selon la revendication 2, caractérisé en ce que la dimension des mailles de la grille est inférieure ou égale à 1/10 de l'épaisseur de la couche de liquide refroidissant.4) Device according to claim 2, characterized in that the mesh size of the grid is less than or equal to 1/10 of the thickness of the layer of cooling liquid. 5) Dispositif selon la revendication 4, caractérisé en ce que, les mailles de la grille ont une dimension comprise entre 0,5 et 10 mm.5) Device according to claim 4, characterized in that, the meshes of the grid have a dimension between 0.5 and 10 mm. 6) Dispositif selon la revendication 2 caractérisé en ce que, à l'aplomb dudit réservoir de métal liquide, ladite surface en mouvement défile dans un plan.6) Device according to claim 2 characterized in that, perpendicular to said liquid metal reservoir, said moving surface scrolls in a plane. 7) Dispositif selon la revendication 2, caractérisé en ce que ladite surface en mouvement à l'aplomb du réservoir de métal liquide présente une courbure dont la concavité est orientée vers ledit réservoir.7) Device according to claim 2, characterized in that said moving surface perpendicular to the liquid metal reservoir has a curvature whose concavity is oriented towards said reservoir. 8) Dispositif selon la revendication 7, caractérisé en ce que ladite surface en mouvement constitue la surface interne d'un tambour.8) Device according to claim 7, characterized in that said moving surface constitutes the internal surface of a drum.
EP89470027A 1988-12-22 1989-12-06 Method and apparatus for continuously casting thin metal wire Expired - Lifetime EP0378036B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89470027T ATE87517T1 (en) 1988-12-22 1989-12-06 METHOD AND DEVICE FOR CONTINUOUS CASTING OF THIN METAL WIRE.

Applications Claiming Priority (2)

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FR8817366 1988-12-22
FR8817366A FR2640898B1 (en) 1988-12-22 1988-12-22

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EP0378036A1 true EP0378036A1 (en) 1990-07-18
EP0378036B1 EP0378036B1 (en) 1993-03-31

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EP (1) EP0378036B1 (en)
JP (1) JPH02217142A (en)
AT (1) ATE87517T1 (en)
BR (1) BR8906655A (en)
CA (1) CA2006167A1 (en)
DE (1) DE68905793D1 (en)
FR (1) FR2640898B1 (en)
RU (1) RU1819186C (en)

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USRE35624E (en) * 1990-01-05 1997-10-07 Kiilunen; David D. Wires made of copper-based alloy compositions
US6527043B2 (en) * 2001-05-01 2003-03-04 Antaya Technologies Corporation Apparatus for casting solder on a moving strip
DE102006042501B4 (en) * 2006-09-07 2010-11-25 Eisenmann Anlagenbau Gmbh & Co. Kg Method and installation for drying objects
RU2467827C1 (en) * 2011-04-26 2012-11-27 Федеральное Государственное Унитарное Предприятие "Научно-Производственное Объединение "Техномаш" Method of wire casting and plant to this end
JP7400578B2 (en) * 2020-03-24 2023-12-19 Tdk株式会社 Alloy ribbon and magnetic core

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US3960200A (en) * 1972-11-14 1976-06-01 Allied Chemical Corporation Apparatus for liquid quenching of free jet spun metal
EP0039169A2 (en) * 1980-04-17 1981-11-04 Tsuyoshi Masumoto Amorphous metal filaments and process for producing the same

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JPS57156863A (en) * 1981-03-24 1982-09-28 Mitsubishi Heavy Ind Ltd Method and device for manufacturing porous and amorphous metallic tape
JPS61119354A (en) * 1984-11-15 1986-06-06 Hitachi Metals Ltd Method and device for production of fine metallic wire
JPS61137653A (en) * 1984-12-11 1986-06-25 Ishikawajima Harima Heavy Ind Co Ltd Production of fine metallic wire

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US3960200A (en) * 1972-11-14 1976-06-01 Allied Chemical Corporation Apparatus for liquid quenching of free jet spun metal
EP0039169A2 (en) * 1980-04-17 1981-11-04 Tsuyoshi Masumoto Amorphous metal filaments and process for producing the same

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Title
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PATENT ABSTRACTS OF JAPAN, vol. 6, no. 134 (M-144)[1012], 21 juillet 1982; & JP-A-57 58 958 (MATSUSHITA DENKI SANGYO K.K.) 09-04-1982 *

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RU1819186C (en) 1993-05-30
EP0378036B1 (en) 1993-03-31
BR8906655A (en) 1990-08-21
DE68905793D1 (en) 1993-05-06
JPH02217142A (en) 1990-08-29
FR2640898A1 (en) 1990-06-29
US5035280A (en) 1991-07-30
FR2640898B1 (en) 1993-06-11
CA2006167A1 (en) 1990-06-22
ATE87517T1 (en) 1993-04-15

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