EP0622138B1 - Process and device for making at least one metal strip of small width and metal strip obtained by this process - Google Patents

Process and device for making at least one metal strip of small width and metal strip obtained by this process Download PDF

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Publication number
EP0622138B1
EP0622138B1 EP94400850A EP94400850A EP0622138B1 EP 0622138 B1 EP0622138 B1 EP 0622138B1 EP 94400850 A EP94400850 A EP 94400850A EP 94400850 A EP94400850 A EP 94400850A EP 0622138 B1 EP0622138 B1 EP 0622138B1
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EP
European Patent Office
Prior art keywords
orifice
molten material
channel
metal strip
cooling surface
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EP94400850A
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German (de)
French (fr)
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EP0622138A1 (en
Inventor
Christian Forest
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Imphy SA
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Imphy SA
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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
    • B22D11/0637—Accessories therefor
    • B22D11/0648—Casting surfaces
    • B22D11/0651—Casting wheels
    • 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
    • B22D11/0637—Accessories therefor
    • B22D11/064—Accessories therefor for supplying molten metal
    • B22D11/0642—Nozzles

Definitions

  • the present invention relates to a method and a device for producing at least one narrow metal strip as well as a strip metallic produced by this process.
  • band is meant a body of form elongated and whose transverse dimensions are very less than its length.
  • the wires, the leaves as well that metallic ribbons are for example considered like metal bands.
  • tapes metal of particular dimensions and in particular require that these strips have a minimum thickness for guarantee, for example, their resistance to oxidation hot when in contact with a medium strongly oxidizing as for example for supports metallic catalysts.
  • Such orifices are regularly arranged at the lower end of the nozzle in a direction transverse to the direction of travel from the surface of the cooling member and are facing downward facing said surface of cooling.
  • the cooling member is formed by example by a wheel.
  • This technique allows training on the metal strips cooling surface small width between 0.5 and 1.5mm and of which the thickness is limited to certain values which depend widths of these strips.
  • an orifice of diameter equal to 1mm allows for example to form on the cooling surface a metal strip of width equal to 1mm and whose thickness cannot exceed 30 ⁇ m which is unacceptable for applications where thickness minimum 40 ⁇ m is required.
  • the Applicant has considered to logical way to increase the diameter of the holes nozzle circulars so that the thickness of the strips metal is higher.
  • the object of the invention is to remedy these disadvantages by proposing a method and a device of at least one weak metallic strip width and having a greater thickness by compared to that of the metal strips obtained by the previously cited technique of the prior art.
  • the subject of the invention is also a strip narrow metal obtained by the process mentioned above, characterized in that said metal strip has a width less than or equal to 2mm and has a thickness greater than or equal to 30 ⁇ m.
  • the device designated as a whole by the reference 1 is intended the development of at least one metal strip 2 of narrow width and includes a metallurgical container 3, called a distributor, containing a molten material 4.
  • the metallurgical container 3 has for example a general shape flared upwards 3a and its section transverse is rectangular.
  • the molten material 4 contained in the metallurgical vessel 3 is maintained at a temperature higher than its melting temperature by means of example of a conventional induction coil and not shown, arranged around said container 3 and on all its height.
  • the molten material is formed for example by a metal alloy of the following weight composition: chromium from 15 to 25%, aluminum from 4 to 10%, the rest being made up of iron and possibly rare earths or elements assimilated to rare earths.
  • the metallurgical container 3 comprises in its constricted lower part 3b, a nozzle 10 communicating with said container 3 and integral with it by conventional means not shown.
  • the nozzle 10 is for example provided on its upper external face with a corresponding thread to a thread located on the inner wall of a conduit arranged in the bottom of the container 3, allowing thus its fixing by screwing.
  • nozzle 10 is formed of a vertical body 11 in which is formed a internal channel 12 communicating with the metallurgical vessel 3 and allowing the flow of molten metal 4 towards one of the lower ends 10a of the nozzle 10.
  • the vertical body 11 is provided in its part bottom of a horizontal plate 11a perpendicular to the side walls of the vertical body 11 and comprising at least one opening 13.
  • the device 1 also comprises at least one mobile cooling surface 20 located under the nozzle 10 and opposite the orifice 13.
  • This cooling surface 20, formed for example by the surface of a wheel 21, is provided at least one groove 22 disposed opposite the orifice 13 and in alignment with it.
  • the orifice 13 has an elongated shape according to the direction of movement of the cooling surface 20 and which is contained in a substantially horizontal plane.
  • the orifice 13 has the function of allowing ejection of the molten material 4 towards the cooling surface 20, and its shape favors the ejection of said molten material in the groove 22 placed opposite said orifice 13 in which it is solidifies by forming the metal strip 2.
  • this molten material is subjected to a sufficiently high pressure when placing the container metallurgical 3 in communication with pressure atmospheric and having sufficient height of molten material in said metallurgical vessel 3.
  • the plate 11a of the vertical body 11 is provided with four orifices 13 identical parallel to each other and regularly spaced apart by a significantly greater distance to the greatest width of each orifice 13 and by example equal to 1.5 times the largest width of the orifice.
  • the cooling surface 20 wheel 21 has four grooves 22 arranged each opposite an orifice 13 of the nozzle 10 and parallel to each other.
  • the respective dimensions of the grooves 22 and orifices 13 are judiciously chosen to obtain metal strips 2 of a given width and of which the thickness is reinforced compared to that of strips metal obtained in a conventional manner by casting of molten metal on a cooling surface to through circular holes.
  • the Applicant has also found that the use of a nozzle with elongated orifices to eject molten material onto a surface of smooth cooling is not satisfactory given that we increase the width of the bands further formed as their thickness.
  • each groove 22 in its upper part 22a is greater than the largest width of each hole 13.
  • each groove 22 in its upper part 22a is between 1.5 and 5 times the largest width of each hole 13 and is for example equal to 1.75 times the largest width of each orifice.
  • each groove 22 is between one and twenty times the thickness of the strip 2, preferably between one and ten times this thickness and more preferably between and five times the thickness of the metal strip 2.
  • each groove 22 is 4.5 times the target thickness of the strip metallic.
  • each groove 22 has a trapezoidal transverse profile, but this shape is in no way limiting and, transverse profiles V-shaped or semi-circular can be considered.
  • Each orifice 13 is located at a distance of the cooling surface 20 of between 0.1 and 2mm, preferably between 0.1 and 1mm and by example equal to 0.5mm.
  • each orifice 13 has a shape oblong, but can also take elongated shapes various depending on the desired geometry for metal strips 2.
  • each orifice 13 is less at 6mm, preferably less than 3mm and by example equal to 2.8mm.
  • the linear speed of movement of the cooling surface 20 is between 10 and 60m / s and preferably between 30 and 45m / s.
  • the metal bands 2 produced by the process according to the invention have a smaller width or equal to 2mm and a thickness greater than or equal to 30 ⁇ m.
  • an orifice nozzle circular diameter of 1.1mm would have allowed to obtain a metal strip 1.2mm wide and 30 ⁇ m thick.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)

Description

La présente invention est relative à un procédé et à un dispositif d'élaboration d'au moins une bande métallique de faible largeur ainsi qu'à une bande métallique élaborée par ce procédé.The present invention relates to a method and a device for producing at least one narrow metal strip as well as a strip metallic produced by this process.

On entend par bande, un corps de forme allongée et dont les dimensions transversales sont très inférieures à sa longueur. Les fils, les feuilles ainsi que les rubans métalliques sont par exemple considérés comme des bandes métalliques.By band is meant a body of form elongated and whose transverse dimensions are very less than its length. The wires, the leaves as well that metallic ribbons are for example considered like metal bands.

Pour certaines applications technologiques, les industriels sont amenés à employer des bandes métalliques de dimensions particulières, et notamment exigent que ces bandes aient une épaisseur minimale pour garantir par exemple leur résistance à l'oxydation à chaud lorsqu'elles sont en contact avec un milieu fortement oxydant comme par exemple pour des supports métalliques de catalyseurs.For certain technological applications, industrialists are led to use tapes metal of particular dimensions, and in particular require that these strips have a minimum thickness for guarantee, for example, their resistance to oxidation hot when in contact with a medium strongly oxidizing as for example for supports metallic catalysts.

Parmi les techniques utilisées jusqu'à présent permettant de réaliser des bandes métalliques, on connaít notamment celle qui consiste à éjecter un métal ou un alliage de métaux en fusion à travers des orifices de forme circulaire ménagés à la partie inférieure d'une buse en vue de le déposer sur une surface d'un organe de refroidissement mobile situé au-dessous de ladite buse, afin de provoquer la solidification de ce métal ou de cet alliage sur ladite surface de refroidissement.Among the techniques used up to present making it possible to produce metal strips, we know in particular that which consists in ejecting a metal or an alloy of metals molten through circular holes at the bottom a nozzle to deposit it on a surface a mobile cooling unit located below of said nozzle, in order to cause the solidification of this metal or alloy on said surface of cooling.

De tels orifices sont régulièrement disposés à l'extrémité inférieure de la buse suivant une direction transversale par rapport à la direction de déplacement de la surface de l'organe de refroidissement et sont tournés vers le bas en regard de ladite surface de refroidissement.Such orifices are regularly arranged at the lower end of the nozzle in a direction transverse to the direction of travel from the surface of the cooling member and are facing downward facing said surface of cooling.

L'organe de refroidissement est formé par exemple par une roue.The cooling member is formed by example by a wheel.

Cette technique permet de former sur la surface de refroidissement des bandes métalliques de faible largeur comprise entre 0,5 et 1,5mm et dont l'épaisseur est limitée à certaines valeurs qui dépendent des largeurs de ces bandes.This technique allows training on the metal strips cooling surface small width between 0.5 and 1.5mm and of which the thickness is limited to certain values which depend widths of these strips.

Ainsi, un orifice de diamètre égal à 1mm permet par exemple de former sur la surface de refroidissement une bande métallique de largeur égale à 1mm et dont l'épaisseur ne peut dépasser 30µm ce qui est inacceptable pour des applications où une épaisseur minimale de 40µm est requise.Thus, an orifice of diameter equal to 1mm allows for example to form on the cooling surface a metal strip of width equal to 1mm and whose thickness cannot exceed 30µm which is unacceptable for applications where thickness minimum 40µm is required.

Pour remédier à ce problème plusieurs solutions ont été envisagées par la demanderesse.To remedy this problem several solutions have been considered by the applicant.

Tout d'abord, la Demanderesse a envisagé de manière logique d'augmenter le diamètre des orifices circulaires de la buse afin que l'épaisseur des bandes métalliques soit plus élevée.First, the Applicant has considered to logical way to increase the diameter of the holes nozzle circulars so that the thickness of the strips metal is higher.

Mais cette solution a eu pour conséquence d'augmenter davantage la largeur desdites bandes que leur épaisseur et les produits métalliques ainsi formés n'étaient plus en conformité avec les exigences dimensionnelles des utilisateurs.But this solution resulted to increase the width of said strips more than their thickness and the metal products thus formed were no longer in compliance with dimensional requirements users.

Ensuite, la Demanderesse a envisagé de réduire la vitesse de déplacement de l'organe de refroidissement pour augmenter l'épaisseur de la bande métallique formée.Next, the Applicant considered to reduce the speed of movement of the cooling member to increase the thickness of the strip metallic formed.

Or, en diminuant cette vitesse, on a constaté une perte d'adhérence du métal sur la surface de refroidissement pouvant conduire à une altération de la solidification du métal constituant la bande métallique.However, by decreasing this speed, we found loss of metal adhesion to the cooling surface which can lead to an alteration of the solidification of the metal constituting the metal strip.

A cet effet, des essais ont été effectués en modifiant la nature et la rugosité de la surface de refroidissement afin de renforcer l'adhérence du métal sur ladite surface de refroidissement.To this end, tests have been carried out in modifying the nature and roughness of the surface of cooling to enhance the adhesion of the metal on said cooling surface.

Cependant, de telles modifications n'ont pas contribué au renforcement de l'adhérence sur la surface de l'organe de refroidissement.However, such modifications did not contributed to strengthening grip on the surface of the cooling member.

L'invention a pour but de remédier à ces inconvénients en proposant un procédé et un dispositif d'élaboration d'au moins une bande métallique de faible largeur et possédant une épaisseur supérieure par rapport à celle des bandes métalliques obtenues par la technique de l'art antérieur précédemment citée.The object of the invention is to remedy these disadvantages by proposing a method and a device of at least one weak metallic strip width and having a greater thickness by compared to that of the metal strips obtained by the previously cited technique of the prior art.

L'invention a donc pour objet un procédé d'élaboration d'au moins une bande métallique de faible largeur à partir d'un matériau en fusion maintenu à une température supérieure à sa température de fusion et contenu dans un récipient métallurgique, procédé selon lequel on injecte le matériau en fusion à travers une buse solidaire dudit récipient métallurgique et on solidifie le matériau en fusion sur une surface de refroidissement mobile située au-dessous de ladite buse, caractérisé en ce que :

  • on soumet le matériau en fusion a une pression au moins égale à la pression atmosphérique,
  • on éjecte ledit matériau en fusion à travers au moins un orifice de forme allongée ménagé à la partie inférieure de ladite buse,
  • on solidifie ledit matériau en fusion dans au moins une rainure ménagée sur ladite surface de refroidissement et disposée en vis à vis dudit orifice et dans l'alignement de celui-ci,
  • et simultanément on déplace ladite surface de refroidissement suivant la direction longitudinale de ladite rainure.
The subject of the invention is therefore a process for producing at least one narrow metal strip from a molten material maintained at a temperature above its melting temperature and contained in a metallurgical container, process according to which the molten material is injected through a nozzle secured to said metallurgical container and the molten material is solidified on a movable cooling surface located below said nozzle, characterized in that:
  • the molten material is subjected to a pressure at least equal to atmospheric pressure,
  • said molten material is ejected through at least one elongated orifice formed at the bottom of said nozzle,
  • said molten material is solidified in at least one groove formed on said cooling surface and arranged opposite said orifice and in alignment with it,
  • and simultaneously moving said cooling surface in the longitudinal direction of said groove.

L'invention a également pour objet un dispositif d'élaboration d'au moins une bande métallique de faible largeur pour la mise en oeuvre du procédé mentionné ci-dessus et comprenant :

  • un récipient métallurgique contenant un matériau en fusion maintenu à une température supérieure à sa température de fusion et comportant dans sa partie inférieure au moins une buse communiquant avec celui-ci et étant munie à une de ses extrémités dite inférieure d'au moins un orifice pour l'éjection du matériau en fusion,
  • au moins une surface de refroidissement mobile située au-dessous de la buse en regard dudit orifice et destinée à recevoir le matériau en fusion et à la solidifier,
    caractérisé en ce que le récipient métallurgique contenant le matériau en fusion est à une pression au moins égale à la pression atmosphérique et en ce que l'orifice présente une forme allongée suivant la direction de déplacement de la surface de refroidissement et qui est contenue dans un plan sensiblement horizontal, ladite surface de refroidissement étant pourvue d'au moins une rainure disposée en vis à vis dudit orifice et dans l'alignement de celui-ci.
The subject of the invention is also a device for producing at least one narrow metal strip for implementing the method mentioned above and comprising:
  • a metallurgical container containing a molten material maintained at a temperature above its melting temperature and comprising in its lower part at least one nozzle communicating with it and being provided at one of its ends called lower with at least one orifice for ejection of the molten material,
  • at least one mobile cooling surface located below the nozzle opposite said orifice and intended to receive the molten material and to solidify it,
    characterized in that the metallurgical container containing the molten material is at a pressure at least equal to atmospheric pressure and in that the orifice has an elongated shape in the direction of movement of the cooling surface and which is contained in a substantially horizontal plane, said cooling surface being provided with at least one groove disposed opposite said orifice and in alignment with the latter.

Selon d'autres caractéristiques de l'invention :

  • la largeur de la rainure dans sa partie haute est supérieure à la plus grande largeur de l'orifice,
  • la profondeur de la rainure est comprise entre 1 et 20 fois l'épaisseur de la bande métallique,
  • la rainure a un profil transversal trapézoïdal, ou en forme de V, ou semi-circulaire,
  • l'orifice a une forme oblongue,
  • la rainure est ménagée à la surface d'une roue.
According to other characteristics of the invention:
  • the width of the groove in its upper part is greater than the greatest width of the orifice,
  • the depth of the groove is between 1 and 20 times the thickness of the metal strip,
  • the groove has a trapezoidal, or V-shaped, or semi-circular transverse profile,
  • the orifice has an oblong shape,
  • the groove is formed on the surface of a wheel.

L'invention a encore pour objet une bande métallique de faible largeur obtenue par le procédé mentionné ci-dessus, caractérisée en ce que ladite bande métallique a une largeur inférieure ou égale à 2mm et a une épaisseur supérieure ou égale à 30µm.The subject of the invention is also a strip narrow metal obtained by the process mentioned above, characterized in that said metal strip has a width less than or equal to 2mm and has a thickness greater than or equal to 30µm.

D'autres caractéristiques et avantages apparaítront au cours de la description qui va suivre, donnée uniquement à titre d'exemple et faite en référence aux dessins annexés, sur lesquels :

  • la Fig. 1 est une vue schématique en perspective du dispositif d'élaboration d'au moins une bande métallique selon un mode de réalisation de l'invention,
  • la Fig. 2 est une vue en coupe longitudinale de la buse du dispositif selon l'invention,
  • la Fig. 3 est une vue de dessous de la buse du dispositif selon l'invention,
  • la Fig. 4 est une vue schématique partielle de dessus de l'organe de refroidissement du dispositif selon l'invention.
Other characteristics and advantages will appear during the description which follows, given solely by way of example and made with reference to the appended drawings, in which:
  • Fig. 1 is a schematic perspective view of the device for producing at least one metal strip according to one embodiment of the invention,
  • Fig. 2 is a view in longitudinal section of the nozzle of the device according to the invention,
  • Fig. 3 is a view from below of the nozzle of the device according to the invention,
  • Fig. 4 is a partial schematic view from above of the cooling member of the device according to the invention.

Comme représenté à la Fig. 1, le dispositif désigné dans son ensemble par la référence 1 est destiné à l'élaboration d'au moins une bande métallique 2 de faible largeur et comprend un récipient métallurgique 3, appelé répartiteur, contenant un matériau en fusion 4.As shown in Fig. 1, the device designated as a whole by the reference 1 is intended the development of at least one metal strip 2 of narrow width and includes a metallurgical container 3, called a distributor, containing a molten material 4.

Le récipient métallurgique 3 a par exemple une forme générale évasée vers le haut 3a et sa section transversale est rectangulaire.The metallurgical container 3 has for example a general shape flared upwards 3a and its section transverse is rectangular.

Le matériau en fusion 4 contenu dans le récipient métallurgique 3 est maintenu a une température supérieure à sa température de fusion au moyen par exemple d'une bobine d'induction classique et non représentée, disposée autour dudit récipient 3 et sur toute sa hauteur.The molten material 4 contained in the metallurgical vessel 3 is maintained at a temperature higher than its melting temperature by means of example of a conventional induction coil and not shown, arranged around said container 3 and on all its height.

Le matériau en fusion est formé par exemple par un alliage métallique de composition pondérale suivante :
chrome de 15 à 25%, aluminium de 4 à 10%, le reste étant constitué par du fer et éventuellement des terres rares ou des éléments assimilés aux terres rares.The molten material is formed for example by a metal alloy of the following weight composition:
chromium from 15 to 25%, aluminum from 4 to 10%, the rest being made up of iron and possibly rare earths or elements assimilated to rare earths.

Le récipient métallurgique 3 comporte dans sa partie inférieure resserrée 3b, une buse 10 communiquant avec ledit récipient 3 et solidaire de celui-ci par des moyens classiques non représentés.The metallurgical container 3 comprises in its constricted lower part 3b, a nozzle 10 communicating with said container 3 and integral with it by conventional means not shown.

A cet effet, la buse 10 est par exemple munie sur sa face supérieure externe d'un filetage correspondant à un filetage situé sur la paroi interne d'un conduit aménagé dans le fond du récipient 3, permettant ainsi sa fixation par vissage.For this purpose, the nozzle 10 is for example provided on its upper external face with a corresponding thread to a thread located on the inner wall of a conduit arranged in the bottom of the container 3, allowing thus its fixing by screwing.

Comme représenté à la Fig. 2, la buse 10 est formée d'un corps vertical 11 dans lequel est ménagé un canal interne 12 communiquant avec le récipient métallurgique 3 et permettant l'écoulement du métal en fusion 4 vers l'une des extrémités 10a dite inférieure de la buse 10.As shown in Fig. 2, nozzle 10 is formed of a vertical body 11 in which is formed a internal channel 12 communicating with the metallurgical vessel 3 and allowing the flow of molten metal 4 towards one of the lower ends 10a of the nozzle 10.

Le corps vertical 11 est muni à sa partie inférieure d'une plaque horizontale 11a perpendiculaire aux parois latérales du corps vertical 11 et comportant au moins un orifice 13.The vertical body 11 is provided in its part bottom of a horizontal plate 11a perpendicular to the side walls of the vertical body 11 and comprising at least one opening 13.

Comme représenté à la Fig. 1, le dispositif 1 selon l'invention comprend également au moins une surface de refroidissement mobile 20 située sous la buse 10 et en regard de l'orifice 13.As shown in Fig. 1, the device 1 according to the invention also comprises at least one mobile cooling surface 20 located under the nozzle 10 and opposite the orifice 13.

Cette surface de refroidissement 20, formée par exemple par la surface d'une roue 21, est pourvue d'au moins une rainure 22 disposée en vis à vis de l'orifice 13 et dans l'alignement de celui-ci.This cooling surface 20, formed for example by the surface of a wheel 21, is provided at least one groove 22 disposed opposite the orifice 13 and in alignment with it.

L'orifice 13 a une forme allongée suivant la direction de déplacement de la surface de refroidissement 20 et qui est contenue dans un plan sensiblement horizontal.The orifice 13 has an elongated shape according to the direction of movement of the cooling surface 20 and which is contained in a substantially horizontal plane.

L'orifice 13 a pour fonction de permettre l'éjection du matériau en fusion 4 en direction de la surface de refroidissement 20, et sa forme favorise l'éjection dudit matériau en fusion dans la rainure 22 placée en vis à vis dudit orifice 13 dans laquelle il se solidifie en formant la bande métallique 2.The orifice 13 has the function of allowing ejection of the molten material 4 towards the cooling surface 20, and its shape favors the ejection of said molten material in the groove 22 placed opposite said orifice 13 in which it is solidifies by forming the metal strip 2.

Pour assurer l'éjection du matériau en fusion par l'orifice 13, ce matériau en fusion est soumis à une pression suffisamment élevée en mettant le récipient métallurgique 3 en communication avec la pression atmosphérique et en disposant d'une hauteur suffisante de matériau en fusion dans ledit récipient métallurgique 3.To eject molten material through orifice 13, this molten material is subjected to a sufficiently high pressure when placing the container metallurgical 3 in communication with pressure atmospheric and having sufficient height of molten material in said metallurgical vessel 3.

Il est également possible lorsque la pression due à la hauteur de matériau en fusion 4 contenu dans le récipient métallurgique 3 est trop faible, d'adjoindre un gaz sous pression au-dessus du niveau supérieur dudit matériau en fusion 4.It is also possible when the pressure due to the height of molten material 4 contained in the metallurgical vessel 3 is too weak, to add a pressurized gas above the upper level of said molten material 4.

Comme représenté sur les Figs. 2 et 3, la plaque 11a du corps vertical 11 est munie de quatre orifices 13 identiques parallèles entre eux et régulièrement espacés d'une distance sensiblement supérieure à la plus grande largeur de chaque orifice 13 et par exemple égale à 1,5 fois la plus grande largeur de l'orifice.As shown in Figs. 2 and 3, the plate 11a of the vertical body 11 is provided with four orifices 13 identical parallel to each other and regularly spaced apart by a significantly greater distance to the greatest width of each orifice 13 and by example equal to 1.5 times the largest width of the orifice.

De ce fait, la surface de refroidissement 20 de la roue 21 comporte quatre rainures 22 disposée chacune en vis à vis d'un orifice 13 de la buse 10 et parallèles entre elles.Therefore, the cooling surface 20 wheel 21 has four grooves 22 arranged each opposite an orifice 13 of the nozzle 10 and parallel to each other.

Les dimensions respectives des rainures 22 et des orifices 13 sont judicieusement choisies pour obtenir des bandes métalliques 2 d'une largeur donnée et dont l'épaisseur est renforcée par rapport à celle de bandes métalliques obtenues de manière classique par la coulée de métal en fusion sur une surface de refroidissement à travers des orifices de forme circulaire.The respective dimensions of the grooves 22 and orifices 13 are judiciously chosen to obtain metal strips 2 of a given width and of which the thickness is reinforced compared to that of strips metal obtained in a conventional manner by casting of molten metal on a cooling surface to through circular holes.

La Demanderesse a également constaté que l'utilisation d'une buse à orifices de forme allongée pour éjecter un matériau en fusion sur une surface de refroidissement lisse n'est pas satisfaisante étant donné que l'on augmente davantage la largeur des bandes ainsi formées que leur épaisseur.The Applicant has also found that the use of a nozzle with elongated orifices to eject molten material onto a surface of smooth cooling is not satisfactory given that we increase the width of the bands further formed as their thickness.

Pour cela, la largeur de chaque rainure 22 dans sa partie haute 22a est supérieure à la plus grande largeur de chaque orifice 13.For this, the width of each groove 22 in its upper part 22a is greater than the largest width of each hole 13.

De préférence, la largeur de chaque rainure 22 dans sa partie haute 22a est comprise entre 1,5 et 5 fois la plus grande largeur de chaque orifice 13 et est par exemple égale à 1,75 fois la plus grande largeur de chaque orifice.Preferably, the width of each groove 22 in its upper part 22a is between 1.5 and 5 times the largest width of each hole 13 and is for example equal to 1.75 times the largest width of each orifice.

Selon la forme que l'on désire obtenir pour les bandes métalliques 2, on peut donner à la partie basse 22b de chaque rainure 22 une forme adaptée.According to the form that one wishes to obtain for metal bands 2 we can give the part low 22b of each groove 22 a suitable shape.

La profondeur de chaque rainure 22 est comprise entre une et vingt fois l'épaisseur de la bande 2, de préférence comprise entre une et dix fois cette épaisseur et plus préférentiellement comprise entre une et cinq fois l'épaisseur de la bande métallique 2.The depth of each groove 22 is between one and twenty times the thickness of the strip 2, preferably between one and ten times this thickness and more preferably between and five times the thickness of the metal strip 2.

Par exemple, la profondeur de chaque rainure 22 est égale à 4,5 fois l'épaisseur visée de la bande métallique.For example, the depth of each groove 22 is 4.5 times the target thickness of the strip metallic.

Comme représenté à la Fig. 4, chaque rainure 22 a un profil transversal trapézoïdal, mais cette forme n'est aucunement limitative et, des profils transversaux en forme de V ou semi-circulaire peuvent être envisagés.As shown in Fig. 4, each groove 22 has a trapezoidal transverse profile, but this shape is in no way limiting and, transverse profiles V-shaped or semi-circular can be considered.

Chaque orifice 13 est situé à une distance de la surface de refroidissement 20 comprise entre 0,1 et 2mm, de préférence comprise entre 0,1 et 1mm et par exemple égale à 0,5mm.Each orifice 13 is located at a distance of the cooling surface 20 of between 0.1 and 2mm, preferably between 0.1 and 1mm and by example equal to 0.5mm.

Selon un mode de réalisation préférentiel représenté à la Fig. 3, chaque orifice 13 a une forme oblongue, mais peut également revêtir des formes allongées diverses en fonction de la géométrie souhaitée pour les bandes métalliques 2.According to a preferred embodiment shown in Fig. 3, each orifice 13 has a shape oblong, but can also take elongated shapes various depending on the desired geometry for metal strips 2.

La longueur de chaque orifice 13 est inférieure à 6mm, de préférence inférieure à 3mm et par exemple égale à 2,8mm.The length of each orifice 13 is less at 6mm, preferably less than 3mm and by example equal to 2.8mm.

La vitesse linéaire de déplacement de la surface de refroidissement 20 est comprise entre 10 et 60m/s et de préférence comprise entre 30 et 45m/s.The linear speed of movement of the cooling surface 20 is between 10 and 60m / s and preferably between 30 and 45m / s.

Les bandes métalliques 2 élaborées par le procédé selon l'invention ont une largeur inférieure ou égale à 2mm et une épaisseur supérieure ou égale à 30µm.The metal bands 2 produced by the process according to the invention have a smaller width or equal to 2mm and a thickness greater than or equal to 30µm.

Dans une rainure de profondeur de 0,2mm, de largeur en partie haute de 1,4mm et de largeur en partie basse de 1,2mm, on élabore des bandes métalliques de largeur de 1,2mm et d'épaisseur de 45µm en utilisant une buse à orifice oblong de 2,8mm de longueur et de 0,8mm de largeur pour une vitesse linéaire de déplacement de la surface de refroidissement 20 à 40 m/s.In a 0.2mm deep groove, width at the top of 1.4mm and width at the top 1.2mm low, we elaborate metal bands of width of 1.2mm and thickness of 45µm using a 2.8mm long and 0.8mm oblong hole nozzle in width for a linear displacement speed of the cooling surface 20 to 40 m / s.

Selon l'art antérieur, une buse à orifice circulaire de diamètre égal à 1,1mm aurait permis d'obtenir une bande métallique de 1,2mm de largeur et de 30 µm d'épaisseur.According to the prior art, an orifice nozzle circular diameter of 1.1mm would have allowed to obtain a metal strip 1.2mm wide and 30 µm thick.

Claims (16)

  1. Process for producing at least one narrow metal strip (2) from a molten material (4) maintained at a temperature above its melting temperature and contained in a metallurgical container (3), in which process the molten material (4) is injected through a nozzle (10) integrally formed with said metallurgical container (3) and the molten material (4) is solidified on a movable cooling surface (20) located below said nozzle (10), characterised in that:
    the molten material (4) is subjected to a pressure at least equal to atmospheric pressure,
    said molten material (4) is injected through at least one elongated orifice (13) provided in the lower part (10a) of said nozzle,
    said molten material is solidified in at least one channel (22) formed on said cooling surface (20) and arranged opposite said orifice (13) and aligned therewith,
    and at the same time said cooling surface (20) is moved in the longitudinal direction of said channel (22).
  2. Process according to claim 1, characterised in that the linear speed of displacement of the cooling surface (20) is between 10 and 60 m/s, preferably between 30 and 45 m/s.
  3. Apparatus for producing at least one narrow metal strip (2) for carrying out the process according to one of claims 1 and 2, comprising:
    a metallurgical container (3) containing a molten material (4) kept at a temperature above its melting temperature and comprising in its lower part (3b) at least one nozzle (10) communicating with the latter and provided at one end, known as the lower end (10a), with at least one orifice (13) for the ejection of the molten material (4),
    at least one movable cooling surface (20) located below the nozzle (10) opposite said orifice and adapted to receive the molten material (4) and cause it to solidify,
    characterised in that the metallurgical container (3) containing the molten material (4) is at a pressure at least equal to atmospheric pressure and in that said orifice (13) is elongated in the direction of movement of the cooling surface (20) and is contained in a substantially horizontal plane, said cooling surface (20) being provided with at least one channel (22) arranged opposite said orifice (13) and aligned therewith.
  4. Apparatus according to claim 3, characterised in that the width of said channel (22) in its top part (22a) is greater than the maximum width of said orifice (13).
  5. Apparatus according to claim 4, characterised in that the width of said channel (22) in its top part (22a) is between 1.5 and 5 times the maximum width of said orifice (13).
  6. Apparatus according to one of claims 3 to 5, characterised in that the depth of said channel (22) is between one and twenty times the thickness of the metal strip (2).
  7. Apparatus according to claim 6, characterised in that the depth of said channel (22) is between one and ten times the thickness of the metal strip (2).
  8. Apparatus according to claim 7, characterised in that the depth of said channel (22) is preferably between one and five times the thickness of the metal strip (2).
  9. Apparatus according to one of claims 3 to 8, characterised in that the channel (22) has a trapezoidal cross section.
  10. Apparatus according to one of claims 3 to 8, characterised in that the channel (22) has a V-shaped cross section.
  11. Apparatus according to one of claims 3 to 8, characterised in that the channel (22) has a semicircular cross section.
  12. Apparatus according to claim 3, characterised in that said orifice (13) in the nozzle (10) is located at a spacing from the cooling surface (20) of between 0.1 and 2 mm, preferably between 0.1 and 1 mm.
  13. Apparatus according to one of claims 3 and 12, characterised in that the length of said orifice (13) is less than 6 mm and preferably less than 3 mm.
  14. Apparatus according to one of claims 3, 12 and 13, characterised in that said orifice (13) is oblong in shape.
  15. Apparatus according to claim 3, characterised in that said channel (22) is provided on the surface of a wheel.
  16. Narrow metal strip (2) obtained by the process according to one of claims 1 and 2, characterised in that said metal strip (2) has a width which is less than or equal to 2 mm and a thickness which is greater than or equal to 30 µm.
EP94400850A 1993-04-28 1994-04-19 Process and device for making at least one metal strip of small width and metal strip obtained by this process Expired - Lifetime EP0622138B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9305042A FR2704464B1 (en) 1993-04-28 1993-04-28 Method and device for producing at least one narrow metal strip and metal strip obtained by this process.
FR9305042 1993-04-28

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EP0622138A1 EP0622138A1 (en) 1994-11-02
EP0622138B1 true EP0622138B1 (en) 1998-08-12

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US (1) US5642771A (en)
EP (1) EP0622138B1 (en)
JP (1) JPH0747449A (en)
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US6626228B1 (en) * 1998-08-24 2003-09-30 General Electric Company Turbine component repair system and method of using thereof
FR2792217B1 (en) * 1999-04-16 2001-06-15 Renault DEVICE FOR TREATING THE EXHAUST GASES OF A MOTOR VEHICLE ENGINE, AND METHOD FOR MANUFACTURING SUCH A GAS TREATMENT DEVICE
US6604570B1 (en) 2002-05-10 2003-08-12 Fiber Tech Co., Ltd. Apparatus and method for manufacturing metal filaments
CN101342594B (en) * 2007-07-12 2011-04-06 北京中科三环高技术股份有限公司 Manufacturing apparatus for alloy slice
CN103639377B (en) * 2013-12-18 2016-05-04 青岛云路先进材料技术有限公司 The manufacturing installation of band and method
CN107755653B (en) * 2017-10-17 2019-05-17 江苏粤阜合金材料有限公司 Integrated aluminium strip pressure rolling trimming production line
KR102175881B1 (en) * 2019-01-15 2020-11-06 공주대학교 산학협력단 Improved apparatus for producing alloy strips

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GB191307140A (en) * 1913-03-25 1913-09-25 Edward Halford Strange Improvements in and Apparatus for the Manufacture of Fine Threads, or Hairs, of Lead, or other Metal, or Alloy.
JPS5823551A (en) * 1981-07-31 1983-02-12 Nippon Steel Corp Multislit nozzle device for casting of amorphous metal
JPS59157322A (en) * 1983-02-18 1984-09-06 Nippon Steel Corp Metallic short fiber having v-shaped bent part and its manufacture
JPS6163346A (en) * 1984-09-06 1986-04-01 Nippon Steel Corp Production of thin amorphous metallic strip having large thickness
JPS6356338A (en) * 1986-08-26 1988-03-10 Tohoku Metal Ind Ltd Apparatus for producing ultraquickly cooled alloy
US4842041A (en) * 1987-06-11 1989-06-27 Nippon Steel Corporation Metal strip manufacturing method and nozzle therefor
JP2579537B2 (en) * 1988-09-28 1997-02-05 新日本製鐵株式会社 Direct casting method of wire rod

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JPH0747449A (en) 1995-02-21
DE69412333D1 (en) 1998-09-17
DE69412333T2 (en) 1998-12-17
US5642771A (en) 1997-07-01
FR2704464B1 (en) 1995-08-11
EP0622138A1 (en) 1994-11-02
FR2704464A1 (en) 1994-11-04

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