EP0208890B1 - Procédé de coulée continue d'un lingot métallique, en particulier d'une bande ou d'un profil, et installation pour réaliser ce procédé - Google Patents

Procédé de coulée continue d'un lingot métallique, en particulier d'une bande ou d'un profil, et installation pour réaliser ce procédé Download PDF

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Publication number
EP0208890B1
EP0208890B1 EP86107532A EP86107532A EP0208890B1 EP 0208890 B1 EP0208890 B1 EP 0208890B1 EP 86107532 A EP86107532 A EP 86107532A EP 86107532 A EP86107532 A EP 86107532A EP 0208890 B1 EP0208890 B1 EP 0208890B1
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EP
European Patent Office
Prior art keywords
nozzle
cooling surface
cooling
molten metal
lip
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP86107532A
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German (de)
English (en)
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EP0208890A2 (fr
EP0208890A3 (en
Inventor
Horst Schenk
Peter Dziura
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.)
Sundwiger Eisenhuette Maschinenfabrik GmbH and Co
Original Assignee
Sundwiger Eisenhuette Maschinenfabrik GmbH and Co
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
Priority claimed from DE19853521778 external-priority patent/DE3521778A1/de
Priority claimed from DE19863602594 external-priority patent/DE3602594A1/de
Application filed by Sundwiger Eisenhuette Maschinenfabrik GmbH and Co filed Critical Sundwiger Eisenhuette Maschinenfabrik GmbH and Co
Priority to AT86107532T priority Critical patent/ATE70752T1/de
Publication of EP0208890A2 publication Critical patent/EP0208890A2/fr
Publication of EP0208890A3 publication Critical patent/EP0208890A3/de
Application granted granted Critical
Publication of EP0208890B1 publication Critical patent/EP0208890B1/fr
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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

Definitions

  • the invention relates to a method for producing metal strands in the form of strips or profiles, in which molten metal is applied from a slot nozzle having two nozzle lips to the cooling surface of a single heat sink moving past the nozzle with a narrow gap.
  • a wedge-shaped solidification front is formed in the area of the nozzle end face of the slot nozzle, which is arranged at a small distance and parallel to the cooling surface. So that no molten metal flows out in an uncontrolled manner during casting, the free gap between the nozzle lips and the cooling surface of the heat sink is chosen so small from the outset that the solidification on the cooling lip inlet side of the nozzle lip is practically complete or the viscosity of the molten metal is sufficient for free flowing out of prevent molten metal through the gap.
  • This method is not suitable for casting thicker strips (more than 0.1 mm) because there is a risk that molten metal will escape between this nozzle lip and the cooling surface, especially at the nozzle lip on the cooling surface inlet side, where the molten metal has the largest free cross section.
  • the invention has for its object to provide a method and an apparatus for producing a metal strand, in particular a metal strip by casting, with which or with which it is possible to prevent the molten metal from flowing out at the start of casting and strands in tight tolerances and To produce tapes with tape thicknesses of up to at least 1.6 mm in narrow thickness tolerances with almost any bandwidth.
  • This object is achieved by the method according to the invention in that, taking into account the solidification front which builds up in a wedge shape in the region of the nozzle during casting onto the moving cooling surface of the cooling body and the speed of the cooling surface, the free gap between the nozzle lip on the strand outlet side and, if appropriate, the lateral nozzle lips and the cooling surface of the heat sink is gradually increased from a small initial value preventing uncontrolled outflow of the molten metal to the final value corresponding to the desired strand thickness and also preventing uncontrolled outflow, the wedge-shaped solidification front being kept within the area of the nozzle.
  • the object is achieved in that, taking into account the solidification front of the melt pool which builds up in a wedge-shaped manner in the region of the nozzle during casting onto the cooling surface part of the heat sink moving from bottom to top, the molten bath level between the cooling surface of the heat sink and the nozzle arranged laterally next to the heat sink gradually to the
  • the extrusion-side nozzle lip determining the strand thickness is raised in such a way that when the molten bath level reaches the outlet-side nozzle lip, the free gap between the solidification front and the outlet-side nozzle lip is sufficiently small to prevent uncontrolled outflow of the molten metal.
  • the distance between the outlet-side nozzle lip and the heat sink is increased, or the bath level is gradually raised as a function of the solidification front.
  • the solidification law is taken into account in the invention from the start of casting, it is ensured that there is no uncontrolled or undesired outflow of molten metal from the area of the nozzle and the cooling surface. Since, even after casting, the speed of the cooling surface of the heat sink is set in such a way that the solidification front remains within the nozzle, it is also ensured that the strand or strip has such tight tolerances that cannot be achieved with known methods.
  • molten metal is applied to the surface of the cast metal strip facing away from the cooling surface from a further nozzle arranged directly in front of the one nozzle in the direction of movement of the cooling surface in the same way as from the one nozzle.
  • the molten metal from the further nozzle should be applied to the still molten metal strip from the first nozzle. In this way, tapes with more than two layers can also be produced.
  • the surface of the lower metal tape facing away from the cooling surface should be protected against oxidizing influences until the further molten metal is applied.
  • the method according to the invention enables the production of a band consisting of several partial strips.
  • molten metal from one or more further nozzles is applied to the moving cooling surface directly next to the molten metal from one nozzle in the same way as from one nozzle in such a way that the metals emerging from the nozzles are in their molten phase are brought together in the area of their border zone or border zones.
  • the surface of the individual layer facing away from the cooling surface should be under a protective gas atmosphere in the area of each cooling section, or this area should at least be partially evacuated, so that no disruptive boundary layers can form between the individual layers.
  • a favorable dimension for the length of the cooling section is 0.8 - 16 times the width of the upstream nozzle in the direction of movement of the cooling surface of the heat sink.
  • the invention further relates to a device for carrying out the described method for casting metal strands in the form of strips and profiles, which consists of a slot nozzle having two nozzle lips, which is connected to a reservoir for molten metal, and a single heat sink, on which with the molten metal can be applied in a narrow gap in front of and in particular inclined to the end face of the nozzle and movable relative to the cooling surface.
  • Such a device is characterized according to a first alternative in that the extrusion-side nozzle lip is assigned an adjusting device with which the distance of the extrusion-side nozzle lip from the cooling surface is controlled depending on the solidification front that forms depending on the relative speed of the cooling surface of the heat sink with respect to the nozzle the heat sink can be adjusted from a small initial value at the start of casting to a large final value after the initial phase.
  • the adjustability is preferably achieved in that the nozzle can be pivoted about an axis running parallel to the cooling surface of the heat sink and transversely to the direction of movement thereof.
  • the cooling surface can be arranged both horizontally and inclined to the horizontal.
  • the cooling surface of the heat sink in the area of the nozzle is arranged inclined with respect to the horizontal, means being provided for the controlled adjustment of the melt pool level in the nozzle depending on the solidification front that forms as a function of the relative speed of the cooling surface of the heat sink relative to the nozzle are that raise the melt pool level from a low initial level at the start of casting to a high final level after the initial phase, so that the length of the solidification front corresponds to the distance corresponds to the die lip on the strand inlet and outlet side at the end of the initial phase.
  • two or more nozzles can be arranged closely one behind the other or next to one another in the direction of movement of the cooling surfaces.
  • two or more nozzle slots can be arranged at a distance in a nozzle in the direction of movement of the cooling surface.
  • the distance between two adjacent nozzle slots should be 0.8 to 16 times the width of the upstream nozzle slot.
  • the spaces between the parallel nozzle slots above the line should be at least partially evacuated or should be exposed to a protective gas.
  • a device set up for this purpose is characterized in that the extrusion-side nozzle lip is profiled in such a way that it forms a gap with the cooling surface of the heat sink that is of different widths, the cooling surface inlet-rare nozzle lip corresponding to the profile of the extrusion-side nozzle lip is offset in the direction of movement of the cooling surface in such a way that in the area of a large gap the inlet-side nozzle lip has a greater width (distance) in the running direction of the cooling surface than in the area of a small gap from the outlet-side nozzle lip.
  • this embodiment of the invention it is ensured that a solidification front spreads according to the profile of the article produced, which enables casting to be carried out without uncontrolled pouring out of the molten metal and also to produce the profile within narrow limits.
  • a profile can also be embedded in the cooling surface of the heat sink.
  • the slot nozzle with its front edge over one or more Gas cushion is supported on the cooling surface and the free surface of the cast metal strip.
  • the air cushions act as a barrier to the molten metal. Due to the very close spacing, the narrow tolerances can be reduced not only for thin strips, but also for thicker strips For example, keep to over 1 mm. Because of the possible narrow distances of the nozzle lips from the cooling surface and the surface of the cast metal strip and the additional sealing by the air cushions, it is possible to work with a higher casting pressure, which also has a favorable effect on the requirements for maintaining close tolerances and the smoothness of the strip .
  • the gas pressure in the gas cushion can preferably be set. This setting will be used when adjusting strip thickness tolerances by adjusting the cooling surface speed in order to prevent the molten metal from escaping due to the gap between the nozzle lips and the cooling surface and the surface of the cast metal strip, which changes within narrow limits during control.
  • the gas supplied to the gas cushion can be heated.
  • the expansion of the introduced gas beads due to the still higher temperature of the molten metal is then no longer so great.
  • the heating of the supplied gas would require a considerable expenditure of energy.
  • An embodiment is therefore preferred in which a chamber is provided between the gas cushion (s) and at least the inlet-side nozzle lip, which can be partially evacuated or via which heated gas can be supplied. In the case of parts evacuation, the gas flowing out of the upstream gas cushion is essentially removed, so that the amount of gas pearls which are otherwise carried in is reduced.
  • heated gas acts as a barrier to the gas of the upstream gas cushion.
  • Protective gas is preferably fed to the gas cushion and the chamber in order to avoid oxidation of the metal on the side facing the cooling surface.
  • the gas cushion there are various options for assembling the gas cushion.
  • a chamber open to the cooling surface and to the free belt surface can be provided, over which the supplied gas is distributed so that the gas cushion can form in front of it.
  • the gas cushion or pillows preferably contain a porous body, via which the gas required for building up pressure can be supplied. It can be held movably in a guide of the slot nozzle body in order to be able to adapt to the position of the free strip surface in the event of fluctuations in strip thickness.
  • a further embodiment of the invention provides that the gas cushions arranged on the nozzle lips and associated chambers can optionally be adjusted individually with the porous bodies relative to the slot nozzle body.
  • a slot nozzle 2 is arranged above a cooling body 1 which is designed as a band and moves in the horizontal direction and which is supplied with molten metal from a casting vessel (not shown) via a feed line (not shown).
  • the pressure with which the molten metal is fed to the slot nozzle 2 can be determined via the bath level in the casting vessel or by means of a compressed gas acting on the molten metal.
  • the slot nozzle 2 can be pivoted about a pivot point 4 located in the area of the strip lip nozzle 3 of the slot nozzle 2, so that the gap between the cooling surface and the strip outlet nozzle lip 5 can be adjusted by the cooling surface of the heat sink 1 while maintaining the gap of the cooling surface inlet side lip 3.
  • the slot nozzle 2 is pivoted such that the gap width in the region of the two nozzle lips 3, 5 is sufficiently small to prevent the molten metal from flowing out in an uncontrolled or undesired manner. If molten metal is now poured from the slot nozzle 2 onto the moving cooling surface of the heat sink 1, a wedge-shaped solidification front 6 is formed. Controlled pivoting of the slot nozzle 2 taking into account the speed of the moving cooling surface and thus also the cast strip 7 results in the wedge-shaped solidification front 6 increasingly steeper in the area of the slot nozzle 2.
  • the cooling surface of a heat sink 8 moves in the vertical direction from the bottom up.
  • the nozzle lip 11 on the strip outlet side is at a distance from the cooling surface of the heat sink 8 which corresponds to the desired thickness of the strip 12 to be cast.
  • apron-like projections 13, 14 are provided on the lateral nozzle lips, which serve as splash protection during casting.
  • the casting process can be carried out practically independently of the position, the casting process with nozzles according to exemplary embodiments 3 to 6 is bound to a direction of movement of the cooling surface that is inclined relative to the horizontal, inclined direction of movement, in which the cast strip is more or less counter to gravity leaves the nozzle less steeply uphill.
  • the speed of the moving cooling surface is chosen so that there is no uncontrolled outflow of the molten metal.
  • the speed is therefore selected so that the wedge-shaped solidification front lies within the nozzle.
  • the slot nozzle according to the exemplary embodiment of FIGS. 7 and 8 differs from that of FIGS. 1 and 2 essentially only in that the strip lip-side nozzle lip 17 is supported on spring elements 18, 19 in such a way that it has a limit value for the strip cast on it applied pressure evades.
  • the nozzle lip 17 can be made adjustable by adjusting screws or adjusting wedges, not shown in the drawing, so that it is possible to adjust the strip thickness.
  • the nozzle according to the exemplary embodiment in FIGS. 9 and 10 differs from the exemplary embodiment in FIGS. 1 and 2 only in that two slot nozzles 19, 20 are formed in close succession and parallel to one another in a pivotable unit.
  • the molten metal emerging from the two slot nozzles 19, 20 is brought together in the molten phase at the end of the solidification front in the region of the first slot nozzle 19, so that it is possible with such a nozzle to produce two-ply strip material that intimately in the boundary zone of the two layers is interconnected.
  • FIGS. 11 and 12 differs from that of FIGS. 1 and 2 in that two slot nozzles 21, 22 are arranged closely next to one another and are formed in a pivotable unit.
  • the molten metal is brought together in the molten phase in the area of the common middle nozzle lip.
  • the exemplary embodiment in FIG. 13 differs from that in FIGS. 1 and 2 in that the nozzle slot is divided into three individual slots 25, 26, 27 by two webs 23, 24 running transversely to the direction of movement of the cooling surface. While a wedge-shaped solidification front forms in the area of the partial slots 25, 26, 27, in the areas of the webs 23, 24 the layers which have already solidified here are further cooled. In the area of the webs 23, 24, the layers are supplied with protective gas via channels 28, 29.
  • the length of the cooling sections a1, a2 should be 0.8 to 16 times the width b1, b2 of the respective upstream nozzle slot 25, 26. With a multiple nozzle designed in this way, thick, amorphously solidified metal strips can be built up from individual, relatively thin layers.
  • the nozzle lip 36, 37 on the strip outlet side is profiled.
  • the nozzle lip 36, 37 thus has a different distance from the cooling surface over the width of the nozzle. So that a solidification front is formed taking this profile into account can, which prevents uncontrolled outflow of molten metal, the respective nozzle width in the direction of movement of the cooling surface is designed as a function of the respective strip thickness, ie that with a small strip thickness and thus also a small distance between the nozzle lip and the cooling surface, the nozzle width is small and with a large strip thickness and thus also a large distance between the nozzle lip and the cooling surface, the nozzle width is large.
  • the profile of the nozzle lip is shown in a top view in FIG. 16 on the left.
  • the slot nozzle 101 shown in FIGS. 18 to 20 has a nozzle body 102 which is seated in a holder 103.
  • the nozzle chamber 104 of the slot nozzle 101 is connected via a line 105 to a vessel for molten metal, not shown.
  • the molten metal can be introduced into the chamber 104 with pressure.
  • actuators 106 the slit nozzle 101 can be adjusted with respect to the inclination and the distance of its end face relative to the cooling surface 107 of a heat sink, which is otherwise not shown and is movable in the direction of arrow 108.
  • cooling surface 107 when cooling surface 107 is advanced in the direction of arrow 108 at speed v, cooling surface 107 develops in the region of Nozzle chamber 104 a solidification wedge 109, which reaches the thickness d of the finished belt 110 on the belt outlet side belt of the chamber 104. The solidification is thus completed in the area of the nozzle chamber 104.
  • a flat chamber 115 to 118 is provided in each of the end faces of the cooling surface inlet side, belt outlet side and side nozzle lips 111 to 114, to which gas can be supplied via lines 119 to 122 for the construction of an end gas cushion 123, 124, 125, 126 with which the slot nozzle is located on the cooling surface 107 and the top of the finished belt 110 is supported.
  • the distance between the nozzle lips 111 to 114 from the cooling surface 107 and the belt 110 can be adjusted via the gas pressure in the individual gas cushions 123 to 126.
  • FIGS. 21 to 24 differs from that of FIGS. 18 to 20 in two features.
  • the supply of pressurized gas and the distribution of pressurized gas takes place via strip-like porous bodies 127 to 130, the sides of which face the nozzle chamber 135 have a gas-tight coating 129a, so that the supplied gas builds up in front of the porous end face of each porous body 128 to 130 and, as indicated in Fig. 24, can flow.
  • the porous bodies 127, 129, 130 are fixed in wedge-shaped grooves 131 to 133, while the porous body 128 on the strip outlet side is held adjustable in a groove 134 with parallel walls in the direction of the cooling surface 107. In this way, the air cushion with the porous body 128 can adapt to fluctuating thicknesses of the band and ensure the support.
  • the second feature which differs from the exemplary embodiment in FIGS. 18 to 20 is that between the air cushions containing the porous bodies 127 to 130 and the Nozzle chamber 135 chambers 136, 137 are arranged, into which either heated protective gas can be introduced via lines 138, 139 or via which gas emerging from the air cushions can be removed. Both alternatives are intended to prevent the belt surface from being oxidized. Especially by the supply of protective gas or by the removal of gas from the air cushion via the cooling surface inlet-side chamber 136, condensate and gas bubbles should also be prevented from developing to an extent between the cooling surface 107 and the facing strip side that the smoothness of the strip surface is affected.
  • Edge regions 141, 142 of the band 143 of molten metal pass the outlet-side edge 145 of the nozzle chamber 146 and solidify in the section between this edge 145 and the porous body 140. Because of the pressure built up in this area, molten metal cannot escape uncontrolled through the larger gap in the middle area.
  • the exemplary embodiment in FIGS. 25 to 27 differs from the previous ones in that the edge 145 on the tape outlet side is exchangeable by one Heater 146 heated bar 147 is formed. This heated bar prevents the metal from freezing on the upper side of the strip in the area of the edge 145 and therefore achieves a smooth strip surface.
  • This exemplary embodiment also differs from the previous embodiments in that the porous bodies 140 on the inlet-side nozzle lip and the outlet-side nozzle lip have at least a partially round cross section and a flat end face and can be rotated about their axes in the correspondingly designed grooves. It is thereby achieved that the flat end faces of the porous bodies 140 are parallel to the cooling surface and belt surface at every angle of inclination of the end face of the nozzle.
  • the lateral porous bodies 148 are mounted in height-adjustable manner in grooves 149 in order to adjust themselves independently depending on the angle of inclination of the end face of the nozzle.
  • the porous bodies 150 to 153 are arranged in adjustable holders 154 to 157, so that it is possible to position the slot nozzle in relation to the cooling surface and independently of the holder Adjust 154 to 157 with the porous bodies 150 to 153.
  • interchangeable nozzle lips 158, 159 are used in the nozzle body and can be heated via channels 160, 161.
  • the gas-permeable porous bodies 127 to 130, 140, 150 to 153 preferably consist of sintered material, ceramic fiber, carbon graphite or a similar material, if possible with certain emergency running properties compared to the material of the cooling surface.
  • heated nozzle lips 145,158,159 is highly heat-resistant metal, such as tungsten, molybdenum or a corresponding metal alloy or a wear-resistant, heat-shock-resistant, possibly melt-repellent ceramic material such as Al2O3, SiC, Si3N4, ZrO2, NgO or the like be armored or sintered on.
  • the nozzle lips are preferably heated.

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  • Continuous Casting (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Claims (33)

  1. Procédé pour la fabrication de barres métalliques sous forme de bandes (7) ou de profilés, dans lequel du métal en fusion provenant d'une buse à fente (2) présentant deux lèvres de buse (3, 4) est amené sur la surface de refroidissement d'un corps de refroidissement (1) unique déplacé devant la buse (2) avec un écartement étroit,
    caractérisé en ce que, en tenant compte du front de solidification (6) qui se constitue en forme de coin lors de la coulée sur la surface de refroidissement déplacée du corps de refroidissement (1) dans la région de la buse (2) et de la vitesse de la surface de refroidissement, on augmente progressivement la fente libre entre la lèvre de buse (5) du côté de sortie de barre et la surface de refroidissement du corps de refroidissement (1) depuis une valeur de départ faible empêchant un écoulement non contrôlé du métal en fusion, jusqu'à la valeur finale correspondant à l'épaisseur de barre souhaitée et empêchant également un écoulement non contrôlé, le front de solidification (6) qui se constitue en forme de coin étant maintenu à l'intérieur de la région de la buse (2).
  2. Procédé pour la fabrication de barres métalliques sous forme de bandes ou de profilés, dans lequel du métal en fusion provenant d'une buse à fente (9) présentant deux lèvres de buse est amené sur la surface de refroidissement d'un corps de refroidissement (8) unique déplacé devant la buse (9) avec un écartement étroit,
    caractérisé en ce que, en tenant compte du front de solidification (16) qui se constitue en forme de coin lors de la coulée sur la partie de surface de refroidissement du corps de refroidissement (8) déplacée du bas vers le haut dans la région de la buse (9), on lève progressivement le niveau du bain de fusion (15) entre la surface de refroidissement du corps de refroidissement (8) et la buse (9) disposée latéralement à côté du corps de refroidissement (8) jusqu'à la lèvre de buse (11) du côté de sortie qui détermine l'épaisseur de barre, de telle manière que, lorsque le niveau du bain de fusion (15) atteint la lèvre de buse (11) du côté de sortie, la fente libre entre le front de solidification (16) et la lèvre de buse (11) du côté de sortie soit suffisamment petite pour empêcher un écoulement non contrôlé du métal en fusion.
  3. Procédé selon la revendication 2,
    caractérisé en ce que le soulèvement du niveau du bain de fusion (9) se produit de telle manière que la fente libre entre les lèvres de buse latérales (13) et le front de solidification (16) reste suffisamment petit pour empêcher un écoulement non contrôlé du métal en fusion.
  4. Procédé selon l'une des revendications 1 à 3,
    caractérisé en ce que, après le début de coulée, on règle la vitesse de la surface de refroidissement du corps de refroidissement (1, 8) de telle manière que le front de solidification se termine pour l'essentiel à la lèvre de buse (11) du côté de sortie.
  5. Procédé selon l'une des revendications 1 à 4,
    caractérisé en ce qu'on amène sur la surface écartée de la surface de refroidissement de la bande de métal coulée, depuis une autre buse (20) disposée immédiatement en avant de la première buse (19) dans la direction de déplacement de la surface de refroidissement, du métal en fusion de la même manière que depuis la première buse (19).
  6. Procédé selon la revendication 5,
    caractérisé en ce que le métal en fusion de l'autre buse (20) est déposé sur la surface de la bande de métal sortant de la première buse encore en fusion.
  7. Procédé selon la revendication 5 ou 6,
    caractérisé en ce que la surface écartée de la surface de refroidissement de chaque bande de métal est protégée des influences oxydantes jusqu'au dépôt de l'autre métal en fusion.
  8. Procédé selon l'une des revendications 1 à 4,
    caractérisé en ce qu'on dépose sur la surface de refroidissement déplacée, immédiatement à côté du métal en fusion d'une première buse (21), du métal en fusion d'une ou plusieurs autres buses (22), de la même manière que de la première buse (21), de sorte que les métaux sortant des deux buses (21, 22) sont guidés ensemble dans leur phase de fusion dans la région de leurs zones limites.
  9. Procédé selon l'une des revendications 5 à 7,
    caractérisé en ce qu'on amène ensemble des métaux différents.
  10. Procédé selon l'une des revendications 5 à 7,
    caractérisé en ce que chaque bande parcourt un segment de refroidissement, dans le cas d'une coulée de plusieurs couches du même métal les unes sur les autres après la coulée de chacune des couches, avant que la couche suivante soit coulée.
  11. Procédé selon la revendication 10,
    caractérisé en ce que, dans la région de chaque segment de refroidissement, la surface de chaque couche écartée de la surface de refroidissement est maintenue sous une atmosphère de gaz protecteur ou ce segment est mis sous vide au moins partiel.
  12. Procédé selon la revendication 10 ou 11,
    caractérisé en ce que la longueur du segment de refroidissement est de 0,8 à 16 fois la largeur de la buse disposée en avant dans la direction de déplacement de la surface de refroidissement du corps de refroidissement.
  13. Dispositif pour la mise en oeuvre du procédé pour la coulée de barres métalliques sous forme de bandes et de profilés selon la revendication 1, qui est constitué d'une buse à fente (2) présentant deux lèvres de buse (3, 5) qui est reliée à un récipient de stockage pour du métal en fusion, et d'un seul corps de refroidissement (4) sur la surface de refroidissement, disposée à fente étroite devant et en particulier inclinée par rapport à la face frontale de la buse (2) et mobile par rapport à elle, duquel le métal en fusion peut être déposé,
    caractérisé en ce qu'un dispositif d'ajustement est adjoint à la lèvre de buse (5) du côté de sortie de la barre, par lequel l'écartement entre la lèvre de buse (5) du côté de sortie de la barre et la surface de refroidissement du corps de refroidissement (1) peut être réglée, en étant contrôlée en fonction du front de solidification (6) qui se constitue, qui dépend de la vitesse relative de la surface de refroidissement du corps de refroidissement (1) par rapport à la buse (2), depuis une valeur de départ faible lors du début de coulée à une valeur finale élevée après la phase de départ.
  14. Dispositif selon la revendication 13,
    caractérisé en ce que la buse (2) est pivotante autour d'un axe (3) s'étendant parallèlement à la surface de refroidissement du corps de refroidissement (1) et transversalement à sa direction de déplacement.
  15. Dispositif pour la mise en oeuvre du procédé pour la coulée de barres métalliques sous forme de bandes et de profilés selon la revendication 1 ou 3, qui est constitué d'une buse à fente (9) présentant deux lèvres de buse (10, 11) qui est reliée à un récipient de stockage pour du métal en fusion, et d'un seul corps de refroidissement (8) sur la surface de refroidissement, disposée à fente étroite devant et en particulier inclinée par rapport à la face frontale de la buse (9) et mobile par rapport à elle, duquel le métal en fusion peut être déposé,
    caractérisé en ce que la surface de refroidissement du corps de refroidissement (8) est disposée inclinée par rapport à l'horizontale dans la région de la buse (9), des moyens étant prévus pour le réglage contrôlé du niveau du bain de fusion dans la buse (9) en fonction du front de solidification qui se constitue, qui dépend de la vitesse relative de la surface de refroidissement du corps de refroidissement (8) par rapport à la buse (9), lesquels moyens lèvent le niveau du bain de fusion depuis un niveau de départ bas lors du début de la coulée jusqu'à un niveau final élevé après la phase de départ, de manière que la longueur du front de solidification corresponde aux lèvres de buse (10, 11) des côtés d'entrée et de sortie de barre à la fin de la phase de départ.
  16. Dispositif selon l'une des revendications 13 à 15,
    caractérisé en ce qu'on peut alimenter la buse à fente (fente de coulée) par du métal en fusion provenant de deux fentes de buse (19, 20) disposées parallèles l'une à l'autre.
  17. Dispositif selon l'une des revendications 13 à 16,
    caractérisé en ce que la buse (9, 33, 34) présente sur ses lèvres de buse latérales des appendices en saillie (13, 14, 35) en tant que protection contre les projections.
  18. Dispositif selon l'une des revendications 13 à 17,
    caractérisé en ce que la lèvre de buse (17) du côté de sortie de la barre est montée effaçable contre la pression.
  19. Dispositif selon l'une des revendications 13 à 18,
    caractérisé en ce que deux buses (19, 20, 25, 26, 27; 21, 22) ou plus sont disposées étroitement les unes derrière les autres ou les unes à côté des autres dans la direction de déplacement de la surface de refroidissement.
  20. Dispositif selon l'une des revendications 13 à 18,
    caractérisé en ce que, dans une buse à fente, deux fentes de buse (25, 26, 27) ou plus sont disposées les unes derrière les autres et parallèles entre elles dans la direction de déplacement de la surface de refroidissement, la distance entre deux fentes de buse adjacentes étant de 0,8 à 16 fois la largeur de la fente de buse disposée devant à chaque fois.
  21. Dispositif selon la revendication 20,
    caractérisé en ce que des espaces intermédiaires sont prévus entre les fentes de buse (25, 26, 27) au-dessus de la bande, qui peuvent être mis sous vide au moins partiel ou être frappés par un gaz de protection.
  22. Dispositif selon l'une des revendications 13 à 21,
    caractérisé en ce que la lèvre de buse (36, 37) du côté de sortie de la barre est profilée de telle manière qu'elle forme avec la surface de refroidissement du corps de refroidissement (38, 39) une fente de largeur variable sur la largeur de la bande, et la lèvre de buse (40, 41) du côté d'entrée de la surface de refroidissement est décalée en direction de déplacement de la surface de refroidissement du corps de refroidissement (38, 39) en correspondance avec le profil de la lèvre de buse (36, 37) du côté de sortie de la barre de telle manière que, dans la région d'une grande fente, la lèvre de buse (40, 41) du côté d'entrée de la surface de refroidissement a un plus grand écartement par rapport à la lèvre de buse (36, 37) du côté de sortie de la barre que dans la région d'une petite fente.
  23. Dispositif selon l'une des revendications 13 à 22,
    caractérisé en ce qu'un profilé est encastré dans la surface du corps de refroidissement.
  24. Dispositif pour la coulée de barres métalliques, en particulier de bandes métalliques selon la revendication 13 ou 15,
    caractérisé en ce que la buse à fente (101) peut être appuyée par son bord frontal (111 à 114), par l'intermédiaire d'un ou plusieurs coussins à gaz (123 à 126), sur la surface de refroidissement (107) et la surface libre de la bande métallique (110) coulée.
  25. Dispositif selon la revendication 24,
    caractérisé en ce que le ou les coussins de gaz (123 à 126) forment une bouche fermée.
  26. Dispositif selon la revendication 24 ou 25,
    caractérisé en ce que la pression de gaz dans les coussins de gaz (123 à 126) peut être réglée.
  27. Dispositif selon l'une des revendications 24 à 26,
    caractérisé en ce qu'une chambre (136, 137) est prévue entre le ou les coussins de gaz (127 à 130) et au moins la lèvre de buse du côté d'entrée de la surface de refroidissement, qui est sous vide partiel ou par laquelle peut être amené un gaz chauffé.
  28. Dispositif selon la revendication 27,
    caractérisé en ce que des chambres correspondantes sont disposées devant les lèvres de buse latérales.
  29. Dispositif selon la revendication 27 ou 28,
    caractérisé en ce qu'une chambre (137) correspondante est disposée devant la lèvre de buse du côté de sortie de barre.
  30. Dispositif selon l'une des revendications 24 à 29,
    caractérisé en ce qu'au moins les coussins de gaz (123) du côté d'entrée de la surface de refroidissement peuvent être frappés par du gaz chauffé.
  31. Dispositif selon l'une des revendications 24 à 30,
    caractérisé en ce que le ou les coussins de gaz (127 à 130) contiennent un corps poreux par lequel peut être amené le gaz nécessaire à la formation de pression.
  32. Dispositif selon la revendication 31,
    caractérisé en ce que le corps poreux (128) est maintenu mobile dans un guidage (134) du corps de buse à fente de telle manière qu'il se règle automatiquement à la position de la surface de refroidissement et/ou de la surface de la barre.
  33. Dispositif selon l'une des revendications 24 à 32,
    caractérisé en ce que les chambres adjointes, le cas échéant avec les corps poreux (150, 151), peuvent être réglées individuellement en position relativement aux corps de buse à fente.
EP86107532A 1985-06-19 1986-06-03 Procédé de coulée continue d'un lingot métallique, en particulier d'une bande ou d'un profil, et installation pour réaliser ce procédé Expired - Lifetime EP0208890B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86107532T ATE70752T1 (de) 1985-06-19 1986-06-03 Verfahren zum herstellen eines metallstranges, insbesondere in form eines bandes oder profils durch giessen und vorrichtung zur durchfuehrung dieses verfahrens.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3521778 1985-06-19
DE19853521778 DE3521778A1 (de) 1985-06-19 1985-06-19 Verfahren zum herstellen eines metallstranges, insbesondere in form eines bandes oder profils durch giessen und vorrichtung zur durchfuehrung dieses verfahrens
DE19863602594 DE3602594A1 (de) 1986-01-29 1986-01-29 Vorrichtung zum giessen von metallbaendern auf einem bewegten kuehlkoerper
DE3602594 1986-01-29

Publications (3)

Publication Number Publication Date
EP0208890A2 EP0208890A2 (fr) 1987-01-21
EP0208890A3 EP0208890A3 (en) 1988-10-26
EP0208890B1 true EP0208890B1 (fr) 1991-12-27

Family

ID=25833220

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86107532A Expired - Lifetime EP0208890B1 (fr) 1985-06-19 1986-06-03 Procédé de coulée continue d'un lingot métallique, en particulier d'une bande ou d'un profil, et installation pour réaliser ce procédé

Country Status (4)

Country Link
US (1) US4719963A (fr)
EP (1) EP0208890B1 (fr)
AT (1) ATE70752T1 (fr)
DE (1) DE3683096D1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3707897A1 (de) * 1987-03-12 1988-09-22 Mannesmann Ag Verfahren und giessvorrichtung zum giessen von baendern aus metall, insbesondere aus stahl
US4942918A (en) * 1988-09-26 1990-07-24 Maringer Robert E Controlled-flow fiber casting
SE507606C2 (sv) * 1991-03-06 1998-06-29 Tetra Laval Holdings & Finance Anordning för framställning av banformig metallfolie
JP3643089B2 (ja) * 2002-05-01 2005-04-27 三菱電機株式会社 ノズル
US7888158B1 (en) * 2009-07-21 2011-02-15 Sears Jr James B System and method for making a photovoltaic unit
DE102011002069A1 (de) * 2011-04-14 2012-10-18 Nordenia Deutschland Gronau Gmbh Klebstoffdüse zum Aufbringen von Klebstoff auf eine bewegte Materialbahn

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US2171132A (en) * 1937-06-19 1939-08-29 Simons Aaron Method of forming elements from molten metal
US2348178A (en) * 1937-11-03 1944-05-02 Joseph M Merle Method of making metallic products of sheetlike form
US4285386A (en) * 1979-03-16 1981-08-25 Allied Chemical Corporation Continuous casting method and apparatus for making defined shapes of thin sheet
DE2938709A1 (de) * 1979-09-25 1981-04-02 Vacuumschmelze Gmbh, 6450 Hanau Verfahren und vorrichtung zur herstellung von amorphen metallbaendern
US4290476A (en) * 1980-01-14 1981-09-22 Allied Chemical Corporation Nozzle geometry for planar flow casting of metal ribbon
US4479528A (en) * 1980-05-09 1984-10-30 Allegheny Ludlum Steel Corporation Strip casting apparatus
US4485839A (en) * 1980-10-22 1984-12-04 Allegheny Ludlum Steel Corporation Rapidly cast alloy strip having dissimilar portions
YU96681A (en) * 1980-10-22 1983-12-31 Allegheny Ludlum Steel Device for casting metal bands
JPS5816761A (ja) * 1981-07-21 1983-01-31 Furukawa Electric Co Ltd:The 金属薄帯の製造方法
JPS59130658A (ja) * 1983-01-17 1984-07-27 Hitachi Cable Ltd 複合金属条の製造方法
EP0126267A1 (fr) * 1983-05-12 1984-11-28 Allied Corporation Appareil de coulée pour contrôler la stabilité du ménisque de coulée et la dégradation de la tuyère de coulée
JPS59215257A (ja) * 1983-05-20 1984-12-05 Ishikawajima Harima Heavy Ind Co Ltd 双ロール式連鋳方法
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JPS60174239A (ja) * 1984-02-20 1985-09-07 Hitachi Zosen Corp 超薄肉テ−プ製造用ノズル
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DE3423834A1 (de) * 1984-06-28 1986-01-09 Mannesmann AG, 4000 Düsseldorf Verfahren und vorrichtung zum kontinuierlichen giessen von metallschmelze, insbesondere von stahlschmelze
US4588015A (en) * 1984-10-17 1986-05-13 Allied Corporation Casting in an exothermic reducing flame atmosphere

Also Published As

Publication number Publication date
EP0208890A2 (fr) 1987-01-21
ATE70752T1 (de) 1992-01-15
US4719963A (en) 1988-01-19
DE3683096D1 (de) 1992-02-06
EP0208890A3 (en) 1988-10-26

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