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EP1062065B1 - Verfahren und vorrichtung zum einstellen der dicke eines zwischen wandernden kokillen stranggegossenen dünnen metallbandes - Google Patents

Verfahren und vorrichtung zum einstellen der dicke eines zwischen wandernden kokillen stranggegossenen dünnen metallbandes Download PDF

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Publication number
EP1062065B1
EP1062065B1 EP99907673A EP99907673A EP1062065B1 EP 1062065 B1 EP1062065 B1 EP 1062065B1 EP 99907673 A EP99907673 A EP 99907673A EP 99907673 A EP99907673 A EP 99907673A EP 1062065 B1 EP1062065 B1 EP 1062065B1
Authority
EP
European Patent Office
Prior art keywords
injector
liquid metal
mobile
tank
baffle
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
EP99907673A
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English (en)
French (fr)
Other versions
EP1062065A1 (de
Inventor
Pierre-Yves Menet
Laurent Calaque
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.)
Constellium Issoire SAS
Original Assignee
Pechiney Rhenalu SAS
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Publication date
Application filed by Pechiney Rhenalu SAS filed Critical Pechiney Rhenalu SAS
Publication of EP1062065A1 publication Critical patent/EP1062065A1/de
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Anticipated expiration legal-status Critical
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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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two 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
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14—Closures

Definitions

  • the invention relates to a method and a device for obtaining a strip.
  • thin metal having a controlled and constant thickness profile by casting continuous between movable molds, for example between blocks, between ribbons, between blocks and ribbons or preferably between cooled cylinders. It mainly concerns aluminum and its alloys.
  • Continuous casting facilities between movable molds include generally an oven supplying liquid metal, using a chute, a injection device uniformly distributing said liquid metal in the air gap located between the movable molds.
  • This device comprises at least one injector having one end down the width of the strip to be poured and the lips of which have a shape adapted to that of the molds; in general it also includes a tray injector located upstream of said injector.
  • the transformation tools give an absolute value tolerance which, in the case of a thin strip, corresponds to an increase in the tolerance relative value; the objective is to obtain the lowest possible relative tolerance, this therefore implies maintaining absolute tolerance within limits all the more strict that the thickness of the thin strip is small.
  • the relative tolerance to be obtained on the crown of a strip is generally ⁇ 0.2%, which translates to a 5mm thick strip having a convex of 0.7%, i.e. 35 ⁇ m, with a tolerance ( ⁇ 0.2%) of ⁇ 10 ⁇ m, while for a 2.5mm thick strip having a convex of 0.7%, i.e. 17.5 ⁇ m, the tolerance of ⁇ 0.2% becomes ⁇ 5 ⁇ m more difficult to hold.
  • the thickness of the strip is given by the dimension of the resulting air gap mainly forces exerted by the cylinders on the metal being solidification and solidified and by the speed of casting.
  • the usual means used to obtain it consist in act on the distribution of the forces applied to the metal by the cylinders, to be modulated the cooling of the cylinders to modify their bulging and / or to adapt the lubrication applied during casting.
  • patent EP 0407978 Hunter
  • US 4944342 Liauener
  • patent EP 0228038 Alcoa
  • patent WO 95/23662 Davy Mc Kee
  • patent EP 0081848 Hazelet
  • the invention is a method of continuous casting between movable molds of a strip.
  • metallic comprising a liquid metal supply of a device injection system comprising at least one injector, and optionally a tank injector located upstream of said injector, said liquid metal being distributed by the downstream end of said injector in the air gap of the movable molds. characterized in that the solidification front of the liquid metal is deformed between the molds movable to obtain the desired strip thickness profile.
  • the solidification front of the liquid metal represents the interface separating the phase liquid from the solid phase and is located in the air gap.
  • the invention therefore consists in imposing a speed distribution and a profile thermal at the outlet of the liquid metal injection device such as the deformation of the solidification front obtained is adapted to the thickness profile of tape sought.
  • the injection device may include a tank injector, located upstream and integral with the injector, whose function is to ensure a first distribution of the liquid metal, that of the injector being to complete this distribution and bring the liquid metal into the air gap.
  • the injector tank receiving the liquid metal generally comprises a bottom and two side walls.
  • the injector generally comprises a bottom, two side walls and a wall upper facing the bottom; the side walls can be convergent, parallel or divergent; the bottom and the top wall are generally converging or parallel. Its downstream end is profiled to introduce the liquid metal between the movable molds or the cylinders and distribute it there over their entire width.
  • At least one of the following means At least one of the following means.
  • each of these can be moved vertically and independently of each other.
  • the injector tank can advantageously be of dimensions reduced compared to the width of the injector.
  • At least one orientable deflector of preferably shaped like an airplane wing, in the injector between the bottom and the upper side.
  • it allows you to modify the flow therefore the thermal path of the liquid metal; but we prefer to use it in complement of the baffle because its implementation is less easy.
  • These means may include a plurality of resistors electrical and / or also a plurality of heat and / or coolant fluid tubes, liquid or gaseous, distributed over the surface of the injection device or embedded in its walls and supplied individually.
  • the baffle can be fitted at each of its ends with movable shutters allowing to modify the dimensions of the lateral space.
  • Displacements of the chicane or one of its elements, and / or the orientation baffle or deflectors and / or local temperature control can be automated and controlled according to the faults observed and the characteristics of the liquid metal feed.
  • Figure 1 shows a liquid metal supply for performing the method according to the invention and comprising a mobile baffle; this power supply is seen in section in (a) and in plan in (b), when the said chicane mobile is in a single element and is seen from the front in (c) when the said baffle mobile has several vertically adjustable elements.
  • FIG. 2 represents an example of the result obtained with the method according to the invention.
  • the supply of liquid metal includes a chute (1) for supplying liquid metal, an injector tank (2) with a baffle (3) movable in several directions, according to the invention, for deforming the solidification front and an injector (4) having profiled outlet lips (5) adapted to the movable molds between which they introduce the liquid metal.
  • a chute (1) for supplying liquid metal
  • an injector (4) having profiled outlet lips (5) adapted to the movable molds between which they introduce the liquid metal.
  • FIG 1 (c) we sees different elements (31 ... 35) vertically movable one relative to the other constituting the mobile baffle (3); dotted lines have been illustrated (32a, 34a) which can be taken respectively for example by the said elements (32, 34).
  • FIG. 2 represents the evolution of the strip thickness profile over time, continuously measured with an X-ray thickness gauge, when the solidification front by modifying the position of a mobile baffle like that in Figure 1.
  • BASC tilting
  • BOMB bulge

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Coating Apparatus (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Moulding By Coating Moulds (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Claims (7)

  1. Stranggussverfahren zwischen bewegten Kokillen zur Herstellung eines Metallbandes, umfassend die Versorgung einer Zuführungsvorrichtung mit Flüssigmetall, welche Zuführungsvorrichtung mindestens eine Düse (4) und optional eine der Düse (4) vorgelagerte Düsenwanne (2) aufweist, wobei sich das Flüssigmetall über das untere Ende der Düse (4) im Walzspalt zwischen den bewegten Kokillen verteilt, dadurch gekennzeichnet, dass die Erstarrungsfront des Flüssigmetalls zwischen den bewegten Kokillen während des Gießens umgeformt wird, indem eine Verteilung der Geschwindigkeiten und ein Wärmeprofil am Ausgang der Vorrichtung in Abhängigkeit von den Ergebnissen der kontinuierlichen Prüfung des Dickenprofils des Bandes so vorgegeben werden, dass sich das gewünschte Banddickenprofil einstellt.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Umformung der Erstarrungsfront durch mindestens eines der folgenden Mittel erreicht wird:
    Verschiebung oder Verstellung eines beweglichen Leitblechs (3), das ein oder mehrere vertikal verschiebbare Elemente aufweist, in der Düsenwanne (2) angeordnet ist und den Metallfluss transversal sperrt;
    Verstellung mindestens eines verstellbaren, in der Düse (4) befindlichen Ablenkblechs, das vorzugsweise wie ein Flugzeugflügel profiliert ist;
    örtliche Modifizierung der Temperatur von Flüssigmetallschichten in der Zuführungsvorrichtung mit Hilfe von Mitteln, die auf den Wänden der Zuführungsvorrichtung vorgesehen oder in diesen versenkt sind oder in direktem Kontakt mit dem Flüssigmetall stehen.
  3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass das ein oder mehrere Elemente aufweisende bewegliche Leitblech (3) nur einen Teil der Breite des Metallflusses in der Düsenwanne (2) einnimmt, vorzugsweise 40 bis 95 % dieser Breite.
  4. Verfahren nach einem der Ansprüche 2 oder 3, dadurch gekennzeichnet, dass das bewegliche Leitblech (3) vertikal, transversal, nach vorn, nach hinten in Bezug auf den Metallfluss und/oder um vertikale, horizontale oder schräge Achsen verschoben wird und/oder dass die Elemente des beweglichen Leitblechs vertikal verschoben werden.
  5. Verfahren nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass die örtliche Modifizierung der Temperatur des Flüssigmetalls mit Hilfe von Isolierungen oder beweglichen Wärmeschildern und/oder Heizund/oder Kühlmitteln erzielt wird, die auf oder in den Wänden der Düsenwanne (2) oder bevorzugt der Düse (4) vorgesehen sind oder in direktem Kontakt mit dem Flüssigmetall stehen.
  6. Vorrichtung zum Stranggießen eines dünnen Metallbandes zwischen gekühlten bewegten Kokillen zur Durchführung des Verfahrens nach einem der Ansprüche 1 bis 5, umfassend mindestens eine Düse (4), optional eine der Düse (4) vorgelagerte Düsenwanne (2) und mindestens eines der folgenden Mittel:
    ein bewegliches Leitblech (3), das ein oder mehrere vertikal verschiebbare Elemente aufweist, den Metallfluss transversal und zumindest teilweise in der Düsenwanne (2) sperrt;
    mindestens ein verstellbares, vorzugsweise wie ein Flugzeugflügel profiliertes Ablenkblech in der Düse (4);
    Mittel zur örtlichen Modifizierung der Temperatur des Flüssigmetalls in der Zuführungsvorrichtung,
    wobei die Mittel geeignet sind, während des Gießens, in Abhängigkeit von den Ergebnissen der während des Gießens durchgeführten kontinuierlichen Prüfung des Dickenprofils des Bandes betätigt zu werden.
  7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass das bewegliche Leitblech (3) vertikal, transversal, parallel zum Metallfluss verschiebbar und/oder in Bezug auf vertikale, horizontale oder schräge Achsen verstellbar ist und nicht die ganze Breite des Metallflusses einnimmt.
EP99907673A 1998-03-13 1999-03-10 Verfahren und vorrichtung zum einstellen der dicke eines zwischen wandernden kokillen stranggegossenen dünnen metallbandes Expired - Lifetime EP1062065B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9803332A FR2775916B1 (fr) 1998-03-13 1998-03-13 Procede et dispositif de controle du profil d'epaisseur d'une bande metallique mince obtenue par coulee continue entre moules mobiles
FR9803332 1998-03-13
PCT/FR1999/000527 WO1999047293A1 (fr) 1998-03-13 1999-03-10 Procede et dispositif de controle du profil d'epaisseur d'une bande metallique mince obtenue par coulee continue entre moules mobiles

Publications (2)

Publication Number Publication Date
EP1062065A1 EP1062065A1 (de) 2000-12-27
EP1062065B1 true EP1062065B1 (de) 2002-12-11

Family

ID=9524202

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EP99907673A Expired - Lifetime EP1062065B1 (de) 1998-03-13 1999-03-10 Verfahren und vorrichtung zum einstellen der dicke eines zwischen wandernden kokillen stranggegossenen dünnen metallbandes

Country Status (11)

Country Link
EP (1) EP1062065B1 (de)
KR (1) KR20010041761A (de)
CN (1) CN1096901C (de)
AR (1) AR014717A1 (de)
AU (1) AU2732599A (de)
BR (1) BR9909259A (de)
DE (1) DE69904451T2 (de)
FR (1) FR2775916B1 (de)
NO (1) NO20004551D0 (de)
TR (1) TR200002640T2 (de)
WO (1) WO1999047293A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10618107B2 (en) 2016-04-14 2020-04-14 GM Global Technology Operations LLC Variable thickness continuous casting for tailor rolling
EP4499331A1 (de) * 2022-03-30 2025-02-05 Novelis Inc. Automatische dammpositionierungssysteme und verfahren zur steuerung der verteilung von geschmolzenem metall an stranggussvorrichtungen

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3799410A (en) * 1972-05-25 1974-03-26 Nat Steel Corp Feed tip for continuous casting machine
FR2398565A1 (fr) * 1977-07-27 1979-02-23 Scal Gp Condit Aluminium Busette d'alimentation en metal liquide pour machine de coulee continue de bande
CH633205A5 (de) * 1978-01-30 1982-11-30 Alusuisse Vorrichtung zum zufuehren einer metallschmelze beim bandgiessen.
CA1192373A (en) * 1981-12-14 1985-08-27 Robert W. Hazelett Method and system for shaping the casting region in a twin-belt continuous casting machine for improving heat transfer and product uniformity and enhanced machine performance
US4550767A (en) * 1984-04-09 1985-11-05 Aluminum Company Of America Roll caster apparatus having uniform flow of molten metal into novel nozzle tip assembly
US4751958A (en) * 1985-10-04 1988-06-21 Hunter Engineering Company, Inc. Continuous casting aluminum alloy
US4678023A (en) * 1985-12-24 1987-07-07 Aluminum Company Of America Closed loop delivery gauge control in roll casting
US4716956A (en) * 1986-12-03 1988-01-05 Aluminum Company Of America Roll caster feed tip and method
CH674166A5 (de) * 1986-12-22 1990-05-15 Lauener Eng Ag
EP0407978B1 (de) * 1989-07-14 1995-12-20 Hunter Engineering Company, Inc. Durchbiegungsregelung in einer Vorrichtung zum Giessen zwischen Giesswalzen
US5452827A (en) * 1993-07-13 1995-09-26 Eckert; C. Edward Nozzle for continuous caster
GB9404109D0 (en) * 1994-03-03 1994-04-20 Davy Mckee Poole Lubrication of casting rolls
FR2737430B1 (fr) * 1995-08-03 1997-09-05 Pechiney Rhenalu Procede et dispositif de demarrage d'une machine de coulee continue entre cylindres

Also Published As

Publication number Publication date
CN1291925A (zh) 2001-04-18
DE69904451D1 (de) 2003-01-23
NO20004551L (no) 2000-09-12
WO1999047293A1 (fr) 1999-09-23
KR20010041761A (ko) 2001-05-25
CN1096901C (zh) 2002-12-25
BR9909259A (pt) 2000-11-28
AR014717A1 (es) 2001-03-28
AU2732599A (en) 1999-10-11
FR2775916B1 (fr) 2000-06-23
FR2775916A1 (fr) 1999-09-17
NO20004551D0 (no) 2000-09-12
EP1062065A1 (de) 2000-12-27
TR200002640T2 (tr) 2001-01-22
DE69904451T2 (de) 2003-09-25

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