EP3015192B1 - Procédé et dispositif destinés à la coulée continue d'un alliage de métal léger - Google Patents

Procédé et dispositif destinés à la coulée continue d'un alliage de métal léger Download PDF

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Publication number
EP3015192B1
EP3015192B1 EP14191415.0A EP14191415A EP3015192B1 EP 3015192 B1 EP3015192 B1 EP 3015192B1 EP 14191415 A EP14191415 A EP 14191415A EP 3015192 B1 EP3015192 B1 EP 3015192B1
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EP
European Patent Office
Prior art keywords
strand
mould
straightening unit
melt
continuous casting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP14191415.0A
Other languages
German (de)
English (en)
Other versions
EP3015192A1 (fr
Inventor
Christian Chimani
Andreas Betz
Alois Birgmann
Salar Bozorgi
Christoph Angermeier
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.)
LKR Leichtmetallkompetenzzentrum Ranshofen GmbH
Original Assignee
LKR Leichtmetallkompetenzzentrum Ranshofen GmbH
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Priority to EP14191415.0A priority Critical patent/EP3015192B1/fr
Priority to RU2015147256A priority patent/RU2015147256A/ru
Publication of EP3015192A1 publication Critical patent/EP3015192A1/fr
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Classifications

    • 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
    • B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
    • B22D11/003—Aluminium alloys
    • 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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/043—Curved moulds
    • 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
    • B22D11/08—Accessories for starting the casting procedure
    • B22D11/081—Starter bars
    • 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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
    • B22D11/1282—Vertical casting and curving the cast stock to the horizontal
    • 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
    • B22D11/14—Plants for continuous casting
    • B22D11/142—Plants for continuous casting for curved casting

Definitions

  • the invention relates to a process for the continuous casting of a light metal alloy, in particular an aluminum alloy or magnesium alloy, wherein a melt of the light metal alloy is withdrawn from a mold in order to obtain a solid continuous cast product after the melt has solidified, the melt having a curved starting head under solidification and The curvature is continuously withdrawn as a strand and then straightened using a straightening unit, a curved strand being pulled out of the mold.
  • the invention relates to a device for the continuous casting of a light metal alloy such as an aluminum alloy or a magnesium alloy, in particular for carrying out a method of the aforementioned type, comprising a mold for a melt and a start-up head for pulling a strand formed from the melt downward from the mold , wherein the strand can be removed from the mold in a curved manner, the starting head is curved and a straightening unit is provided in order to bend the strand after solidification but before it has completely cooled.
  • a light metal alloy such as an aluminum alloy or a magnesium alloy
  • DE 31 50 175 A1 discloses a device for casting steel, wherein a continuous strand is cast in accordance with the preceding paragraph, the strand emerging from the mold with a curved starting head in the beginning curved shape is extended.
  • the method is said to be applicable to metals including steel.
  • the JP 2007 275915 A discloses a method for strip casting of light metals, the light metal being brought into a strip structure by two opposing rollers, after which the strip thus produced is deflected in an oil strip and then directed.
  • the GB 1,069,097 discloses a method and an apparatus for the continuous casting of steel, wherein a strand is withdrawn from a mold and then bent into a horizontal course.
  • Aluminum alloys can also be created in continuous casting.
  • a strand from a mold is guided vertically down into a subsequent basin for further cooling.
  • aluminum alloys which can also be processed at much lower temperatures, solidify extremely quickly. While the metallurgical length until a strand completely solidifies in steel is several meters, in aluminum alloys it is in the range of a few centimeters. For this reason, vertical continuous casting of aluminum alloys can only be carried out semi-continuously, with a length of the continuous casting products being predetermined by an overall height of the device. If longer components are required, they have to be joined again, which can be problematic.
  • the object of the invention is to provide a method of the type mentioned at the outset with which the metallurgical advantages of vertical continuous casting can be utilized in a continuous and simple manner.
  • Another goal is to provide a suitable device for this.
  • the procedural object is achieved with a method according to claim 1.
  • An advantage achieved by the invention can be seen in the fact that a method is provided which combines the advantages of vertical continuous casting in light metal alloys, in particular aluminum alloys, with the advantages of continuous continuous casting.
  • the mold can be a mold that is usually used in vertical continuous casting.
  • the strand is pulled off with a curved starting head at the start of the pulling-off.
  • the curvature of the drawn-off strand is predetermined by the curvature of the starting head.
  • the curvature set in this way also minimizes the subsequent expenditure of force for straightening the drawn-off strand.
  • the start head and later the strand can be moved with drive means, in particular drive rollers, after the mold. If the strand is round in cross section, profiled drive rollers are preferably provided.
  • a contact pressure of the drive means on the strand is set by employing at least one movable adjusting means. This means that the desired contact pressure and thus the advance of the strand can be set at any time.
  • the actuating means or actuators can be operated in a position and / or pressure-controlled manner.
  • the strand is preferably bent into an approximately horizontal position.
  • the strand will be bent with the straightening unit after it has solidified, but before it has cooled completely. Since the solidification of z. B. aluminum alloys including subsequent cooling takes place comparatively quickly with steel, a radius of curvature is chosen for the strand so that it comes as quickly as possible in a horizontal or at least approximately horizontal position to be straightened, but can be straightened in this position with little effort. At the same time, provision can also be made for the strand to be straightened in the completely cooled state, although this requires a greater effort.
  • the force exerted on the straightening unit can be very high without further measures.
  • the strand is therefore also heated before the straightening unit.
  • increasing the temperature to more than about 0.4 times the homologous temperature can bring about a significant improvement in ductility.
  • It can also be provided in a control loop that during the continuous removal of the strand the heating before the straightening unit and cooling of the melt in and / or after the mold are reduced. In this case, the process is first carried out with a required cooling capacity on the mold and, if necessary, secondary cooling as well as a required heating output before the straightening unit.
  • control circuit can reduce the cooling, which at the same time means that a heating output in front of the straightening unit can also be reduced. As a result, both the heating output and the cooling output decrease in the further process, which leads to a particularly energy-efficient process.
  • a temperature around the drawn-off strand is adjusted or regulated as a function of the position in order to achieve an optimum of processability and energy efficiency.
  • the advantages of vertical and horizontal continuous casting in the case of aluminum alloys or other light metal alloys can be combined in a structurally simple manner.
  • the vertical acceptance with the curved start-up head ensures a high metallurgical quality of a continuous casting product.
  • the straightening unit can eliminate the curvature of the strand and provide a semi-finished product that can be continuously removed horizontally. If required, a separating unit for cutting the semi-finished product or continuous cast product to any length can also be provided following the straightening unit.
  • drive means for moving the strand and optionally at least one vibration device are provided after the mold.
  • the drive means can be contour-matched to an outer contour of the strand in order to enable the best possible power transmission.
  • an adjusting means can also be provided for setting a contact pressure of the drive means on the strand at a certain position. This allows the strand to be optimally moved forward. With the optionally provided at least one vibration device, a withdrawal behavior can be improved.
  • a control unit connected to the drive means can be provided, with which a pull-off speed of the strand can be adjusted and can be adjusted during a pull-off. This allows process optimization.
  • a heater is provided between the mold and the straightening unit.
  • the removed strand can optionally be tempered in front of the straightening unit in such a way that an input of force by the straightening unit is minimized.
  • This can be particularly useful because the strand of z. B. cools an aluminum alloy relatively quickly.
  • a control unit for the heating is provided, with which a heating output of the heating and / or a cooling output of a cooling device can be controlled as a function of a line temperature upstream of the straightening unit. Based on the strand temperature required for straightening, both the cooling capacity for creating a strand and a heating capacity of the heating can be minimized. However, the cooling capacity must of course be high enough to form a strand that is solidified at least on the outside.
  • FIG. 1 A device 1 according to the invention is shown in an exemplary embodiment variant for a continuous casting of aluminum alloys.
  • the device 1 has a mold 2.
  • the mold 2 is formed with a rectangular cross section, as is known for vertical continuous casting of aluminum alloys.
  • a cooling device 10 is provided for secondary cooling by means of air or possibly also water.
  • the device 1 also has drive means 7, which can be designed, for example, as rotatable drive rollers.
  • An actuating means 8 is arranged opposite the drive means 7.
  • the adjusting means 8 is formed with a lever, which is also shown in dashed lines in a position not engaging the starting head 5. With the Adjusting means 8 can be set, for example, via the lever movement of the starting head 5 shown and later, in a manner still to be explained, a strand 3 on the drive means 7.
  • a contact pressure is also set via a lever force.
  • the device 1 comprises a heater 9, which is arranged in front of a straightening unit 6, also provided, with a plurality of support units 12 and a straightening lever 13.
  • the support units 12 can be designed, for example, like the drive means 7 as rollers.
  • the straightening lever 13, like the adjusting means 8, is shown in two positions, the situation shown corresponding to that in continuous operation.
  • a control device which interacts with a supply for the cooling device 10 and the heater 9, can be provided, so that a cooling capacity of the cooling device 10 as well as a heating capacity of the heating device 9 depends on a temperature of a strand 3 shown in broken lines in front of the straightening unit 6 are adjustable.
  • a method according to the invention can be carried out with a device 1.
  • the initial situation corresponds to that in Fig. 1 .
  • a melt 11 of an aluminum alloy is held in the mold 2 and cannot melt downwards because an outlet is closed by the starting head 5.
  • the actuating means 8 is set on the starting head 5 in such a way that it is pressed sufficiently against the drive means 7.
  • the starting head 5 is then guided along the circular path of the strand 3 in the direction of the heater 9.
  • the strand 3 is formed on the starting head 5, which is then moved or guided forward by the drive means 7 and by the actuating means 8 with a passive roller.
  • the strand 3 passes through the heater 9, which, for example, can be designed as a spindle heater as shown.
  • a method according to the invention combines the advantages of vertical continuous casting of aluminum alloys with those of a horizontal method: high-quality semi-finished products are continuously obtained. This can be done through a simple Achieve a design that can be easily applied to different sized geometries. In addition, the process is not only insensitive to harsh casting environments, but also energy efficient. In particular, if the strand 3 reaches the straightening unit 6 at a sufficient temperature, possibly after heating with the heater 9 in the meantime, an input of force for the straightening required is also minimized.

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

Claims (11)

  1. Procédé de coulée continue d'un alliage métallique léger, en particulier d'un alliage d'aluminium ou d'un alliage de magnésium, dans lequel une coulée (11) de l'alliage métallique léger est extraite vers le bas d'une coquille (2) pour obtenir, après la solidification de la coulée (11), un produit solide coulé en continu (4), dans lequel la coulée (11) est extraite au moyen d'une barre (3) de démarrage courbée (5) en se solidifiant et en se courbant en continu sous forme d'une barre et est ensuite cintrée droite au moyen d'une unité de dressage (6), une barre courbée (3) étant extraite de la coquille (2), caractérisé en ce que la barre (3) est chauffée en amont de l'unité de dressage (6).
  2. Procédé selon la revendication 1, caractérisé en ce que la barre (3) est déplacée à la suite de la coquille (2) grâce à des moyens d'entraînement (7), en particulier des rouleaux d'entraînement.
  3. Procédé selon la revendication 2, caractérisé en ce qu'une force de compression des moyens d'entraînement (7) sur la barre (3) est réglée par approche d'au moins un moyen de positionnement déplaçable (8).
  4. Procédé selon une des revendications 1 à 3, caractérisé en ce que la barre (3) est cintrée dans une position approximativement horizontale.
  5. Procédé selon une des revendications 1 à 4, caractérisé en ce que la barre (3), après solidification, est cintrée au moyen de l'unité de dressage (6) mais avant son refroidissement complet.
  6. Procédé selon une des revendications 1 à 5, caractérisé en ce que, pendant l'extraction continue de la barre (3), le réchauffement en amont de l'unité de dressage (6) et un refroidissement de la coulée (11) dans et/ou en aval de la coquille (2) sont réduits.
  7. Dispositif (1) de coulée continue d'un alliage métallique léger comme un alliage d'aluminium ou un alliage de magnésium, en particulier pour la réalisation d'un procédé selon une des revendications 1 à 6, comprenant une coquille (2) pour une coulée (11) et une tête de démarrage (5) pour l'extraction d'une barre formée de la coulée (11) de la coquille (2) vers le bas, la barre (3) pouvant être extraite courbée de la coquille (2), la tête de démarrage (5) ayant une conformation courbée et étant prévue une unité de dressage (6) pour cintrer la barre (3) après solidification mais avant son refroidissement complet, caractérisé en ce que, entre la coquille et (2) et l'unité de dressage (6), un chauffage (9) est prévu.
  8. Procédé (1) selon la revendication 7, caractérisé en ce que, à la suite de la coquille (2), des moyens d'entraînement (7), en particulier des rouleaux d'entraînement, sont prévus pour déplacer la barre (3), de même qu'en option au moins un dispositif vibratoire.
  9. Procédé (1) selon la revendication 8, caractérisé en ce qu'un moyen de positionnement (8) est prévu pour le réglage d'une force de compression des moyens d'entraînement (7) vers la barre (3) à une position définie.
  10. Procédé (1) selon la revendication 8 ou 9, caractérisé en ce qu'il est prévu une unité de réglage en liaison avec les moyens d'entraînement (7) et grâce à laquelle une vitesse d'extraction de la barre (3) est réglable et adaptable pendant une extraction.
  11. Procédé (1) selon la revendication 7, caractérisé en ce qu'il est prévu pour le chauffage (9) une unité de réglage grâce à laquelle une puissance chauffante du chauffage (9) et/ou une puissance de refroidissement d'un dispositif de refroidissement (10) est réglable en fonction d'une température de la barre en amont de l'unité de dressage (6).
EP14191415.0A 2014-11-03 2014-11-03 Procédé et dispositif destinés à la coulée continue d'un alliage de métal léger Active EP3015192B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP14191415.0A EP3015192B1 (fr) 2014-11-03 2014-11-03 Procédé et dispositif destinés à la coulée continue d'un alliage de métal léger
RU2015147256A RU2015147256A (ru) 2014-11-03 2015-11-03 Способ и устройство непрерывного литья сплавов легких металлов

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14191415.0A EP3015192B1 (fr) 2014-11-03 2014-11-03 Procédé et dispositif destinés à la coulée continue d'un alliage de métal léger

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EP3015192A1 EP3015192A1 (fr) 2016-05-04
EP3015192B1 true EP3015192B1 (fr) 2020-06-03

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RU (1) RU2015147256A (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1069097A (en) * 1962-12-03 1967-05-17 Mannesmann Ag Continuous casting installation

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT343830B (de) * 1974-07-26 1978-06-26 Vmw Ranshofen Berndorf Ag Ein- oder mehrstrangige stranggiessanlage
IT1136226B (it) * 1980-12-23 1986-08-27 Continua Int Macchina per la colata continua in curva di metalli anche d acciaio con falsa barra flessibile od articolata
IT1171101B (it) * 1983-03-04 1987-06-10 Continua Int Macchina per la colata continua in curva di metalli in particolare d acciaio con falsa barra corta
JP4655994B2 (ja) * 2005-05-10 2011-03-23 日本軽金属株式会社 アルミニウムの竪型連続鋳造装置およびこの鋳造装置を用いた竪型連続鋳造方法
JP2007275915A (ja) * 2006-04-05 2007-10-25 Haruhide Kyo オンライン熱処理を有する軽金属薄板の双ロール連続鋳造法
DE102006052138A1 (de) * 2006-05-16 2007-11-22 Sms Demag Ag Verfahren und Strangführungseinrichtung zum Führen eines gegossenen Strangs
DE102010007659B4 (de) * 2010-01-12 2019-05-09 Sms Group Gmbh Stranggießmaschine mit einem Kaltstrang

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1069097A (en) * 1962-12-03 1967-05-17 Mannesmann Ag Continuous casting installation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PROF. DR.-ING. KLAUS SCHWERDTFEGER: "Metallurgie des Stranggiessens - Giessen und Erstarren von Stahl", 1992, VERLAG STAHL EISEN MBH, Düsseldorf, ISBN: 3-514-00350-5 *

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Publication number Publication date
EP3015192A1 (fr) 2016-05-04
RU2015147256A (ru) 2017-05-11

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