EP2828011B1 - Laminage thermomécanique d'une plaque d'aluminium - Google Patents

Laminage thermomécanique d'une plaque d'aluminium Download PDF

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Publication number
EP2828011B1
EP2828011B1 EP13719045.0A EP13719045A EP2828011B1 EP 2828011 B1 EP2828011 B1 EP 2828011B1 EP 13719045 A EP13719045 A EP 13719045A EP 2828011 B1 EP2828011 B1 EP 2828011B1
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EP
European Patent Office
Prior art keywords
rolling
temperature
aluminium plate
pass
state variable
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
EP13719045.0A
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German (de)
English (en)
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EP2828011A1 (fr
Inventor
Matthias Kurz
Birger Schmidt
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.)
Primetals Technologies Germany GmbH
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Primetals Technologies Germany GmbH
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Filing date
Publication date
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Priority to EP13719045.0A priority Critical patent/EP2828011B1/fr
Publication of EP2828011A1 publication Critical patent/EP2828011A1/fr
Application granted granted Critical
Publication of EP2828011B1 publication Critical patent/EP2828011B1/fr
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B21B2003/001—Aluminium or its alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/06—Thermomechanical rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/006—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring temperature

Definitions

  • the invention relates to a method for reversely thermomechanical rolling of an aluminum plate in a rolling process with several rolling passes.
  • WO 2008/043684 discloses, for example, a method for tracking the physical condition of a hot plate or strip as part of the control of a rolling line for reversibly processing a hot plate or strip.
  • an initial state of the hot plate or hot strip from which at least one physical state variable is derivable is determined in a model and the state is cyclically updated during the processing of the hot plate using the model, wherein a tracking of the hot plate or hot strip and the condition influencing and / or reproducing operating parameters are taken into account.
  • EP 2 111 309 B1 discloses a method for thermomechanically controlled rolling of a batch of metal slabs into sheets or strips in a rolling mill having at least one rolling stand according to a rolling scheme comprising at least two rolling phases and applied to each slab of the batch.
  • a rolling phase applied to a slab or plate or a strip is followed by another rolling phase which is on another slab or plate or another strip on this rolling stand is applied.
  • the time interval between the start times of their rolling phases is always smaller than the sum of the durations of all rolling phases and all cooling phases of the rolling scheme.
  • EP 1 958 711 A1 discloses a method for thermomechanically controlled rolling of metal slabs in which each metal slab is rolled during at least two rolling phases interrupted by a cooling phase and a plurality of metal slabs are rolled simultaneously.
  • the preamble of claim 1 is based on the document EP 1 958 711 A1 ,
  • EP 2 305 392 A1 discloses a method of rolling rolling in which the rolling process comprises a cooling phase between two hot rolling transformations. During the cooling phase, a temperature difference between a central region and an edge region of the rolling stock is counteracted by heating the edge region.
  • the invention has for its object to provide an improved method for reversing thermomechanical rolling an aluminum plate.
  • characteristic data for the thermal guidance of the rolling process are specified and values of at least one state variable, from which a temperature of the aluminum plate can be derived, are continuously determined.
  • a pass schedule for the rolling process is determined, which provides a rolling break between at least two consecutive rolling passes during which the rolling of the aluminum plate is interrupted for its cooling.
  • the characteristics associate at least one rolling pass with a waiting thickness of the aluminum plate, and the pass plan provides for the beginning of a rolling break as soon as the Thickness of the aluminum plate in this rolling pass reaches or falls below his assigned waiting thickness.
  • An aluminum plate is understood in this application to mean a plate which consists of aluminum or an aluminum alloy.
  • a temperature averaged over a thickness of the aluminum plate or a surface temperature or a residual solidification or phase portions or grain sizes or an enthalpy of the aluminum plate is preferably determined.
  • an aluminum plate is thus rolled temperature-controlled.
  • the temperature of the aluminum plate can be controlled and controlled during the rolling process.
  • the control of the temperature takes place by means of rolling breaks, in which the aluminum plate is cooled.
  • the rolling temperature is known to significantly affect material properties of aluminum plates.
  • the temperature of the aluminum plate during the rolling process can be controlled such that subsequent finishing steps known in the art for thermally generating certain mechanical properties of the aluminum plate material become superfluous to the rolling.
  • Such manufacturing steps are, for example, solution heat treatment, quenching or curing of the aluminum.
  • the invention further provides that the characteristics of at least one rolling break assign a Wiederanwalztemperatur the aluminum plate, and that the stitch plan to stop this Roll break provides as soon as the temperature of the aluminum plate reaches the Bachwalwalztemperatur.
  • the aluminum plate cools during a rolling break to a defined temperature, namely the assigned to it Wiederanwalztemperatur. This advantageously improves the control and control of the temperature of the aluminum plate during the rolling process.
  • An embodiment of the invention provides that the characteristics include a target temperature, and that the stitch plan determines a duration of a rolling break or a Wiederwalwalztemperatur the aluminum plate after a rolling break such that the temperature of the aluminum plate after the last pass match the target temperature.
  • a target temperature of the aluminum plate can be achieved in the last pass. This makes it possible to set advantageous material properties of the aluminum already at the end of the rolling process without expensive finishing.
  • a further embodiment of the invention provides that the characteristic data contain a cooling temperature, and that the aluminum plate is fed after the last rolling pass a cooling unit and cooled by the cooling unit to the cooling temperature.
  • the characteristics preferably also include a cooling rate, and the aluminum plate is cooled to the cooling temperature at the cooling rate after the last rolling pass by means of the cooling unit.
  • a particularly preferred embodiment of the invention provides that at least one rolling pass of another aluminum plate is carried out during at least one rolling break.
  • This is for example one off EP 2 111 309 B1 Known method used for rolling several aluminum plates.
  • rolling breaks can be used advantageously for processing further aluminum plates, so that the utilization of a rolling train can be optimized.
  • a further embodiment of the invention provides that a rolling force threshold value is predetermined as a function of at least one state variable of the aluminum plate, and that the pass schedule restricts the rolling force during rolling to the respective rolling force threshold depending on the values of the at least one state variable.
  • a thickness decrease threshold is set as a function of at least one state variable of the aluminum plate, and the stitch plan reduces the decrease in thickness of the aluminum plate during each roll pass depending on the values of the at least one state variable to the respective thickness decrease threshold.
  • a thickness of the aluminum plate is preferably used.
  • other geometric variables e.g. a curvature or profile of the aluminum plate, or thermodynamic variables, e.g. a temperature of the aluminum plate.
  • the material properties of the aluminum can be further improved and in particular an undesired grain growth in the aluminum plate can be counteracted.
  • a further embodiment of the invention provides that the aluminum plate is cooled by a cooling unit during at least one rolling break.
  • cooling units for cooling the aluminum plate is advantageous because aluminum plates are usually rolled at relatively low temperatures and therefore passive cooling of the aluminum plates would cost too much time.
  • a further embodiment of the invention provides that measured values of at least one measured variable associated with a temperature of the aluminum plate are continuously recorded and the values of the at least one state variable are determined on the basis of the detected measured values by means of a temperature model evaluating these measured values.
  • a temperature model evaluating these measured values.
  • Such methods for determining a current temperature of the aluminum plate using a temperature model are particularly advantageous because a sufficiently accurate direct measurement of a temperature of aluminum plates is usually difficult or too expensive and therefore the use of a model for temperature determination is useful.
  • a further embodiment of the invention provides that the stitch plan is continuously updated, for example, after each pass of the aluminum plate by a cooling unit.
  • measured values 1 of at least one measured variable associated with a temperature of the aluminum plate are recorded.
  • Such measured variables are in particular temperatures at different locations of the aluminum plate and for the aluminum plate characteristic variables such as a microstructure.
  • a current temperature of the aluminum plate is determined on the basis of the detected measured values 1 by means of a temperature model 2 of the aluminum plate evaluating these measured values 1, as is apparent from FIG WO 2008/043684 is known.
  • a pass schedule 5 for the rolling process is determined, which also includes actuators 6 required to achieve the characteristics 4.
  • actuators 6 include a cooling time in air cooling the aluminum plate, a number of rolling passes, a flow rate the aluminum plate through a rolling mill and / or amounts of water of a cooling unit.
  • the aluminum plate is rolled during each rolling pass up to a respective rolling pass associated waiting thickness. Subsequently, the rolling of the aluminum plate is interrupted by a rolling break until it has cooled to a rolling break associated Wiederanwalztemperatur the following roll pass.
  • the aluminum plate can be cooled passively or actively by means of a cooling unit.
  • the waiting thicknesses and re-rolling temperatures depend on the material and the target geometry of the aluminum plate. These quantities are sometimes derivable from phase diagrams, for example in the case of aluminum plates of aluminum-copper or aluminum-magnesium alloys, but are generally determined empirically.
  • the re-rolling temperature of the last rolling pass is determined from the temperature model 2 such that the temperature of the aluminum plate after the last rolling step coincides with the target temperature.
  • the target temperature may e.g. be characterized by an average over the thickness of the aluminum plate temperature, a surface temperature or by an enthalpy.
  • the aluminum plate is fed to a cooling unit and cooled by means of the cooling unit at the cooling rate to the cooling temperature.
  • the stitch plan takes into account, in addition to the characteristic data 4 for the thermal guidance of the rolling process, also further characteristic data, e.g. a maximum rolling force acting on the aluminum plate and / or a maximum thickness decrease of the aluminum plate during the individual rolling passes.
  • the pass schedule is cyclical, For example, after each passage of the aluminum plate through a cooling unit, updated on the basis of the determined instantaneous temperature, in particular, the actuators 6 are updated for further cooling.
  • the target variables in particular a target thickness and the target temperature of the aluminum plate.
  • At least one further aluminum plate is pre-rolled during the cooling of the aluminum plate in a rolling break. That's what it's made of EP 2 111 309 B1 Known method used for staggered rolling multiple aluminum plates.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Control Of Metal Rolling (AREA)
  • Metal Rolling (AREA)
  • Winding Of Webs (AREA)

Claims (12)

  1. Procédé de laminage thermomécanique réversible d'une plaque d'aluminium dans un procédé de laminage à plusieurs passes de laminage, dans lequel
    - des paramètres (4) pour la conduite thermique du procédé de laminage sont prédéfinis,
    - un plan de passe (5) pour le procédé de laminage est déterminé et
    - le plan de passe (5) prévoit entre au moins deux passes de laminage successives une pause de laminage pendant laquelle le laminage de la plaque d'aluminium est interrompu pour permettre son refroidissement,
    caractérisé en ce que
    - en permanence, des valeurs d'au moins une grandeur d'état (3) sont déterminées, d'où peut être déduite une température de la plaque d'aluminium,
    - le plan de passe (5) pour le procédé de laminage est déterminé en fonction des valeurs déterminées de l'au moins une grandeur d'état (3) et des paramètres (4),
    - les paramètres (4) attribuent à au moins une passe de laminage une épaisseur d'attente de la plaque d'aluminium,
    - le plan de passe prévoit le commencement d'une pause de laminage aussitôt que l'épaisseur de la plaque d'aluminium dans cette passe de laminage atteint ou est inférieure à l'épaisseur d'attente qui lui a été attribuée,
    - les paramètres (4) d'au moins une pause de laminage attribuent une température de nouveau laminage à la plaque d'aluminium, et le plan de laminage prévoit la fin de cette pause de laminage aussitôt que la température de la plaque d'aluminium atteint la température de nouveau laminage.
  2. Procédé selon la revendication 1,
    caractérisé en ce que les paramètres (4) contiennent une température cible, et en ce que le plan de passe détermine une durée d'une pause de laminage ou une température de nouveau laminage de la plaque d'aluminium après une pause de laminage de telle manière que la température de la plaque d'aluminium coïncide avec la température cible après la dernière passe de laminage.
  3. Procédé selon l'une des revendications précédentes,
    caractérisé en ce qu'est déterminée en tant que grandeur d'état (3) une température moyennée selon une épaisseur de la plaque d'aluminium ou une température de surface ou une solidification au repos ou une composante de phase ou une granulométrie ou une enthalpie de la plaque d'aluminium.
  4. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que les paramètres (4) contiennent une température de refroidissement, et en ce qu'après la dernière passe de laminage la plaque d'aluminium est amenée à une unité de refroidissement et est refroidie au moyen de l'unité de refroidissement jusqu'à la température de refroidissement.
  5. Procédé selon la revendication 4,
    caractérisé en ce que les paramètres (4) contiennent une vitesse de refroidissement, et en ce qu'après la dernière passe de laminage la plaque d'aluminium est refroidie au moyen de l'unité de refroidissement à la vitesse de refroidissement jusqu'à la température de refroidissement.
  6. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que pendant au moins une pause de laminage, au moins une passe de laminage d'une autre plaque d'aluminium est mise en oeuvre.
  7. Procédé selon l'une des revendications précédentes,
    caractérisé en ce qu'une valeur de seuil de la force de laminage est prédéfinie comme fonction d'au moins une variable d'état de la plaque d'aluminium, et en ce que le plan de passe limite la force de laminage pendant le laminage en fonction des valeurs de l'au moins une variable d'état à la valeur de seuil de la force de laminage respective.
  8. Procédé selon l'une des revendications précédentes,
    caractérisé en ce qu'une valeur de seuil de l'amincissement est prédéfinie comme fonction d'au moins une variable d'état de la plaque d'aluminium, et en ce que le plan de passe limite la diminution d'une épaisseur de la plaque d'aluminium pendant chaque passe de laminage en fonction des valeurs de l'au moins une variable d'état à la valeur de seuil de l'amincissement respective.
  9. Procédé selon la revendication 7 ou la revendication 8,
    caractérisé en ce qu'une épaisseur de la plaque d'aluminium est utilisée en tant que variable d'état.
  10. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que la plaque d'aluminium est refroidie par une unité de refroidissement pendant au moins une pause de laminage.
  11. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que sont acquises en permanence des valeurs de mesure (1) d'au moins une grandeur de mesure cohérente avec une température de la plaque d'aluminium, et en ce que les valeurs de l'au moins une grandeur d'état (3) sont déterminées à l'aide des valeurs de mesure (1) acquises au moyen d'un modèle de température (2) estimant l'une de ces valeurs de mesure (1).
  12. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que le plan de passe (1) est actualisé en permanence.
EP13719045.0A 2012-04-26 2013-04-17 Laminage thermomécanique d'une plaque d'aluminium Active EP2828011B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13719045.0A EP2828011B1 (fr) 2012-04-26 2013-04-17 Laminage thermomécanique d'une plaque d'aluminium

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP20120165758 EP2656932A1 (fr) 2012-04-26 2012-04-26 Laminage thermomécanique d'une plaque d'aluminium
PCT/EP2013/057960 WO2013160162A1 (fr) 2012-04-26 2013-04-17 Laminage thermomécanique d'une plaque d'aluminium
EP13719045.0A EP2828011B1 (fr) 2012-04-26 2013-04-17 Laminage thermomécanique d'une plaque d'aluminium

Publications (2)

Publication Number Publication Date
EP2828011A1 EP2828011A1 (fr) 2015-01-28
EP2828011B1 true EP2828011B1 (fr) 2017-08-09

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EP20120165758 Withdrawn EP2656932A1 (fr) 2012-04-26 2012-04-26 Laminage thermomécanique d'une plaque d'aluminium
EP13719045.0A Active EP2828011B1 (fr) 2012-04-26 2013-04-17 Laminage thermomécanique d'une plaque d'aluminium

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EP20120165758 Withdrawn EP2656932A1 (fr) 2012-04-26 2012-04-26 Laminage thermomécanique d'une plaque d'aluminium

Country Status (5)

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US (1) US10131979B2 (fr)
EP (2) EP2656932A1 (fr)
CN (1) CN104245166B (fr)
BR (1) BR112014026380B1 (fr)
WO (1) WO2013160162A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2656932A1 (fr) 2012-04-26 2013-10-30 Siemens Aktiengesellschaft Laminage thermomécanique d'une plaque d'aluminium
FR3018213B1 (fr) 2014-03-06 2016-10-21 Constellium France Tole de brasage a placages multiples
FR3024058B1 (fr) * 2014-07-23 2016-07-15 Constellium France Procede et equipement de refroidissement
DE102014222827A1 (de) * 2014-11-07 2016-05-12 Sms Group Gmbh Verfahren zum Steuern und/oder Regeln einer metallurgischen Anlage

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FR2529578B1 (fr) * 1982-07-02 1986-04-11 Cegedur Procede pour ameliorer a la fois la resistance a la fatigue et la tenacite des alliages d'al a haute resistance
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EP1958711A1 (fr) * 2007-02-16 2008-08-20 Siemens VAI Metals Technologies Ltd. Procédé et appareil pour roulement contrôlé thermo-mécaniquement des plaques et bandes métalliques
EP2305392A1 (fr) * 2009-10-05 2011-04-06 Siemens Aktiengesellschaft Procédé de laminage de matériaux de laminage et train de laminage doté d'au moins une cage de laminoir pour le laminage thermomécanique de matériaux de laminage
EP2656932A1 (fr) 2012-04-26 2013-10-30 Siemens Aktiengesellschaft Laminage thermomécanique d'une plaque d'aluminium

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Also Published As

Publication number Publication date
US20150122375A1 (en) 2015-05-07
BR112014026380A8 (pt) 2018-04-03
EP2656932A1 (fr) 2013-10-30
US10131979B2 (en) 2018-11-20
BR112014026380B1 (pt) 2019-11-19
BR112014026380A2 (pt) 2017-06-27
WO2013160162A1 (fr) 2013-10-31
CN104245166B (zh) 2016-11-02
CN104245166A (zh) 2014-12-24
EP2828011A1 (fr) 2015-01-28

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