EP0761326B1 - Installation for producing hot rolled thin strip - Google Patents

Installation for producing hot rolled thin strip Download PDF

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Publication number
EP0761326B1
EP0761326B1 EP96113523A EP96113523A EP0761326B1 EP 0761326 B1 EP0761326 B1 EP 0761326B1 EP 96113523 A EP96113523 A EP 96113523A EP 96113523 A EP96113523 A EP 96113523A EP 0761326 B1 EP0761326 B1 EP 0761326B1
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EP
European Patent Office
Prior art keywords
stand
reversing
production plant
plant according
stands
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Expired - Lifetime
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EP96113523A
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German (de)
French (fr)
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EP0761326A1 (en
Inventor
Günter Dr. Kneppe
Dieter Rosenthal
Stephan Krämer
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SMS Siemag AG
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SMS Schloemann Siemag AG
Schloemann Siemag AG
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Priority claimed from DE19538341A external-priority patent/DE19538341A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/26—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/30—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process
    • B21B1/32—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
    • B21B1/34—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work by hot-rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • B21B1/466—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a non-continuous process, i.e. the cast being cut before rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/02—Austenitic rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/04—Ferritic rolling

Definitions

  • the invention relates to a production plant for the production of hot-rolled flat products, consisting of a multi-stand Rolling mill on at least the first stand as a reversing stand is designed, an outlet roller table with devices for cooling of the hot strip and with downstream winding machines for winding of the tape.
  • a generic rolling mill is known from US-A-5 150 597 become.
  • Such rolling plants for the production of hot-rolled strips are generally designed and operated today so that the Forming takes place in the individual scaffolding austenitic, that is, it is ensured that the rolling temperatures in the individual Rolling stands above the GOS line of the iron carbon diagram lie. Only after the last rolling pass, which is necessary to achieve a fine-grained final structure as close as possible to the GOS line should, cooling to the reel temperature takes place with structural change in the cooling section or in the wound bundle.
  • the finish rolling temperature that is the temperature in the last roll stand of the rolling mill depending on the height the carbon content at approx. 840 to 920 ° C.
  • Compliance with the Final rolling temperature is done by changing the final rolling speed, with the natural cooling of the strip in the rolling mill and the supply of heat through the drive power of the roll stands can be controlled.
  • This method can be used without any problems for strip thicknesses above a minimum strip thickness, depending on the type of road is of the order of 1.3 mm. Will this strip thickness below the required rolling speed with values above 12 m per second at the tape head, a height that no longer in the free run on the roller table behind the rolling mill can be mastered.
  • a preferred method sees pre-rolling in austenitic Range up to an intermediate thickness of 2 to 8 mm and one finish roll in the ferritic range to the lowest final thicknesses below of 1.3 mm in front.
  • the rolling stock must be between the two process stages from the final rolling temperature in the austenitic range to the rolling temperature be cooled in the ferritic range. This means one Cooling from the temperature range of 840 to 920 ° C to the Temperature range from 600 to 780 ° C.
  • the finish rolling temperature is after the second deformation stage also in the range of 600 to 780 ° C and thus on the order of magnitude, in which recrystallization of the Structure occurs in the wound bundle.
  • a structure is created which means the use of the product without further cold forming or Allows heat treatment.
  • Compliance is essential for a good result a minimum cooling time for cooling from the austenitic Area in the ferritic area. So that the transformation of austenite sufficient cooling in ferrite, this minimum cooling time be respected. This lies depending on the selected temperature and alloy composition for entry into the first ferritic forming on the order of a few seconds to towards a few minutes.
  • the process described above is implemented in one conventionally designed hot strip mill considerable difficulties.
  • the transition from austenitic to ferritic Forming should be carried out in the thickness range from 2 to 8 mm, that is, in a thickness range in which the rolling stock is roughly in Located in the middle of a conventional finishing train. Because the lead time from scaffolding to scaffolding at this point only a few seconds is, in principle, it is possible to implement cooling, however, adherence to the time required for the conversion cannot be realized. Carrying out ferritic rolling according to the method described is conventional for that designed hot strip mill impossible.
  • At least the first framework the rolling mill is designed as a reversing stand, the at least A reel furnace is upstream and downstream, with between in front of the reel furnace and the following reversing stand controllable cooling device is provided.
  • a production plant constructed in this way can, like conventional ones Plants operated in the austenitic area.
  • This will be Rolled material supplied by a roughing mill or thin slab casting machine, which usually has a thickness of 50 - 100 mm, in one Oven tempered to approx. 1100 ° C and in which one or more Scaffolding existing reversing line (Steckel No) by queuing rolled by one or more stands and in which the Steckel tile subsequent Steckel or reel furnace.
  • the strip is removed from the Steckel furnace withdrawn and in one or more scaffolding of the Steckel tile approx. 5 to 15 mm thick rolled down and then in the input side Steckel oven wound up.
  • the temperature of the belt is in this area still above 850 ° C.
  • the tape is from on the input side of the Steckel furnace and in the Steckel stands and rolled down the rest of the rolling mill to a thickness of approximately 1 mm and wound up by the winding machine.
  • a cooling device be provided, by means of which the approx. 5 to 15 mm thick Belt is cooled to temperatures below 850 ° C.
  • the tape can be converted in the Steckelstrasse and the rest rolled down the rolling mill into a strip with a thickness of approx. 1 mm become.
  • the output side Dispense with reel furnace there is also the possibility on the output side Dispense with reel furnace.
  • the belt is opened in the reversing line rolled down about 5 to 15 mm, again here before the It is decided to wind up on the reel furnace on the input side, whether by switching the cooling device on or off in the following Rolling process in the ferritic or austenitic range should be rolled.
  • Figure 1 shows a continuous caster 1, the scissors 2, a Oven 3, a pair of scissors 4, which is only intended for emergency cuts and a descaling device 5 connects.
  • one each Controllable cooling device follows as required, by means of which the belt if necessary can be cooled in the ferritic range.
  • the strip can also have austenitic temperatures or after cooling in the cooling device 7 with its temperature are only in the ferritic range.
  • a heating device 12 preferably closes the reversing line an induction furnace, which can be used for the belt if necessary temperature required in the austenitic or ferritic range.
  • the heater 12 follows one further scissors 13, a descaling device 14, the rolling mill 15, a winding machine 16, a cooling section 17 and another Winding machine 18.
  • Figure 3 shows a similar production facility as in Figure 2. Here is shown after the emergency scissors 4, the reel furnace 6, which the Cooling and / or descaling device 19, the reversing line 20 ', the descaling device 14, the reversing line 20 ′′ and a Roller table 22 connects.

Abstract

The device comprises a multi-stand rolling section, a roller conveyor with cooling units, and coiling devices. At least the first stand (8) of the rolling section is a reverser stand which is preceded and followed by at least one spool furnace (6,11). A controllable cooling unit (7) is located between the furnace (6) and the reverser stand (8).

Description

Die Erfindung betrifft eine Produktionsanlage zur Erzeugung von warmgewalzten Flachprodukten, bestehend aus einer mehrgerüstigen Walzstraße bei der mindestens das erste Gerüst als Reversiergerüst ausgebildet ist, einem Auslaufrollgang mit Einrichtungen zur Kühlung des Warmbandes und mit nachgeordneten Wickelmaschinen zum Aufwickeln des Bandes.The invention relates to a production plant for the production of hot-rolled flat products, consisting of a multi-stand Rolling mill on at least the first stand as a reversing stand is designed, an outlet roller table with devices for cooling of the hot strip and with downstream winding machines for winding of the tape.

Eine gattungsgemäße Walzanlage ist durch die US-A-5 150 597 bekannt geworden. Derartige Walzanlagen zur Erzeugung warmgewalzter Bänder werden heute im allgemeinen so ausgelegt und betrieben, daß die Umformung in den einzelnen Gerüsten austenitisch erfolgt, das heißt, es wird sichergestellt, daß die Walztemperaturen in den einzelnen Walzgerüsten oberhalb der GOS-Linie des Eisenkohlenstoffdiagramms liegen. Erst nach dem letzten Walzstich, der zur Erzielung eines feinkörnigen Endgefüges möglichst nahe an der GOS-Linie liegen sollte, erfolgt die Abkühlung auf die Haspeltemperatur mit Gefügeumwandlung in der Kühlstrecke bzw. im gewickelten Bund.A generic rolling mill is known from US-A-5 150 597 become. Such rolling plants for the production of hot-rolled strips are generally designed and operated today so that the Forming takes place in the individual scaffolding austenitic, that is, it is ensured that the rolling temperatures in the individual Rolling stands above the GOS line of the iron carbon diagram lie. Only after the last rolling pass, which is necessary to achieve a fine-grained final structure as close as possible to the GOS line should, cooling to the reel temperature takes place with structural change in the cooling section or in the wound bundle.

Für niedrig legierte Kohlenstoffstähle liegt für die Walzung nach dem oben beschriebenen Verfahren die Endwalztemperatur, das heißt die Temperatur im letzten Walzgerüst der Walzstraße je nach Höhe des Kohlenstoffgehalts bei ca. 840 bis 920 °C. Die Einhaltung der Endwalztemperatur erfolgt durch die Veränderung der Endwalzgeschwindigkeit, mit der die natürliche Abkühlung des Bandes in der Walzstraße und die Wärmezufuhr durch die Antriebsleistung der Walzgerüste gesteuert werden kann. Dieses Verfahren ist problemlos anwendbar für Banddicken oberhalb einer Mindestbanddicke, die je nach Straßentyp in der Größenordnung von 1,3 mm liegt. Wird diese Banddicke unterschritten, so erreicht die erforderliche Walzgeschwindigkeit mit Werten oberhalb von 12 m pro Sekunde am Bandkopf eine Höhe, die im freien Auslauf auf dem Rollgang hinter der Walzstraße nicht mehr beherrscht werden kann.For low-alloy carbon steels lagging behind for rolling the method described above, the finish rolling temperature, that is the temperature in the last roll stand of the rolling mill depending on the height the carbon content at approx. 840 to 920 ° C. Compliance with the Final rolling temperature is done by changing the final rolling speed, with the natural cooling of the strip in the rolling mill and the supply of heat through the drive power of the roll stands can be controlled. This method can be used without any problems for strip thicknesses above a minimum strip thickness, depending on the type of road is of the order of 1.3 mm. Will this strip thickness below the required rolling speed with values above 12 m per second at the tape head, a height that no longer in the free run on the roller table behind the rolling mill can be mastered.

Die ungeachtet dieser Problematik vorhandene Entwicklungstendenz in Richtung geringerer Enddicken hat dazu geführt, daß nach Wegen gesucht wurde, die Endwalztemperatur abzusenken, um damit geringere Walzgeschwindigkeiten zu ermöglichen. Solche Walzprozesse wurden unter der Bezeichnung ferritisches Walzen bekannt, da sie bei Temperaturen unterhalb der GOS-Linie, das heißt im Bereich der α ,γ-Mischkristalle oder unterhalb der GPS-Linie im ferritischen Bereich erfolgen.The development tendency existing despite this problem in the direction of lower final thicknesses has led to ways was sought to lower the finish rolling temperature to lower it To enable rolling speeds. Such rolling processes were Known under the name ferritic rolling, because they are Temperatures below the GOS line, i.e. in the area of the α , γ mixed crystals or below the GPS line in the ferritic Area.

Ein bevorzugtes Verfahren sieht eine Vorwalzung im austenitischen Bereich bis auf eine Zwischendicke von 2 bis 8 mm und eine Fertigwalzung im ferritischen Bereich auf geringste Enddicken unterhalb von 1,3 mm vor. Zwischen den beiden Prozeßstufen muß das Walzgut von der Endwalztemperatur im austenitischen Bereich auf die Walztemperatur im ferritischen Bereich abgekühlt werden. Dies bedeutet eine Abkühlung aus dem Temperaturbereich von 840 bis 920 °C auf den Temperaturbereich von 600 bis 780 °C.A preferred method sees pre-rolling in austenitic Range up to an intermediate thickness of 2 to 8 mm and one finish roll in the ferritic range to the lowest final thicknesses below of 1.3 mm in front. The rolling stock must be between the two process stages from the final rolling temperature in the austenitic range to the rolling temperature be cooled in the ferritic range. This means one Cooling from the temperature range of 840 to 920 ° C to the Temperature range from 600 to 780 ° C.

Die Endwalztemperatur hinter der zweiten Verformungsstufe liegt ebenfalls im Bereich von 600 bis 780 °C und damit in einer Größenordnung, bei der nach dem Aufhaspeln eine Rekristallisation des Gefüges im gewickelten Bund eintritt. Es entsteht ein Gefüge, welches die Verwendung des Produktes ohne weitere Kaltumformung oder Wärmebehandlung ermöglicht.The finish rolling temperature is after the second deformation stage also in the range of 600 to 780 ° C and thus on the order of magnitude, in which recrystallization of the Structure occurs in the wound bundle. A structure is created which means the use of the product without further cold forming or Allows heat treatment.

Wesentliche Voraussetzung für ein gutes Ergebnis ist die Einhaltung einer Mindestkühlzeit für die Abkühlung aus dem austenitischen Gebiet in das ferritische Gebiet. Damit die Umwandlung von Austenit in Ferrit in ausreichendem Maße erfolgen kann, muß diese Mindestkühlzeit eingehalten werden. Diese liegt je nach gewählter Temperatur und Legierungszusammensetzung für den Eintritt in die erste ferritische Umformung in der Größenordnung von wenigen Sekunden bis hin zu einigen Minuten.Compliance is essential for a good result a minimum cooling time for cooling from the austenitic Area in the ferritic area. So that the transformation of austenite sufficient cooling in ferrite, this minimum cooling time be respected. This lies depending on the selected temperature and alloy composition for entry into the first ferritic forming on the order of a few seconds to towards a few minutes.

Die Realisierung des oben beschriebenen Prozesses bereitet in einer konventionell gestalteten Warmbreitbandstraße erhebliche Schwierigkeiten. Der Übergang von der austenitischen in die ferritische Umformung soll im Dickenbereich von 2 bis 8 mm vorgenommen werden, das heißt in einem Dickenbereich, bei dem sich das Walzgut etwa in Mitte einer konventionellen Fertigstraße befindet. Da die Durchlaufzeit von Gerüst zu Gerüst an dieser Stelle nur wenige Sekunden beträgt, ist eine Realisierung der Kühlung zwar prinzipiell möglich, jedoch kann die Einhaltung der geforderten Zeit für die Umwandlung nicht realisiert werden. Die Durchführung des ferritischen Walzens nach der beschriebenen Methode wird damit für die konventionell gestaltete Warmbreitbandstraße unmöglich.The process described above is implemented in one conventionally designed hot strip mill considerable difficulties. The transition from austenitic to ferritic Forming should be carried out in the thickness range from 2 to 8 mm, that is, in a thickness range in which the rolling stock is roughly in Located in the middle of a conventional finishing train. Because the lead time from scaffolding to scaffolding at this point only a few seconds is, in principle, it is possible to implement cooling, however, adherence to the time required for the conversion cannot be realized. Carrying out ferritic rolling according to the method described is conventional for that designed hot strip mill impossible.

Bei diesem Stand der Technik besteht die Aufgabe der Erfindung darin, eine Produktionsanlage für das Walzen von Warmband zu schaffen, mit der die zuvor genannten Nachteile und Probleme beseitigt werden und unter erwünschter Begrenzung der Auslaufgeschwindigkeit ein wählbarer Teil der Reduktion des Bandes im ferritischen Bereich erfolgt.In this prior art, the object of the invention in creating a production line for hot strip rolling, with which the aforementioned disadvantages and problems are eliminated and with the desired limitation of the outlet speed a selectable part of the reduction of the band in the ferritic range he follows.

Diese Aufgabe wird dadurch gelöst, daß mindestens das erste Gerüst der Walzstraße als Reversiergerüst ausgebildet ist, dem mindestens je ein Haspelofen vor- und nachgeordnet sind, wobei zwischen dem vorgesetzten Haspelofen und dem folgenden Reversiergerüst eine steuerbare Kühlvorrichtung vorgesehen ist.This object is achieved in that at least the first framework the rolling mill is designed as a reversing stand, the at least A reel furnace is upstream and downstream, with between in front of the reel furnace and the following reversing stand controllable cooling device is provided.

Eine so konstruierte Produktionsanlage kann, wie herkömmliche Anlagen im austenitischen Bereich betrieben werden. Dazu wird das von einer Vorstraße bzw. Dünnbrammengießmaschine gelieferte Walzgut, welches üblicherweise eine Dicke von 50 - 100 mm aufweist, in einem Ofen auf ca. 1100°C temperiert und in der aus einem oder mehreren Gerüsten bestehenden Reversierstraße (Steckelstraße) durch Anstellen von einem oder mehreren Gerüsten gewalzt und in dem sich an die Steckelstraße anschließenden Steckel- bzw. Haspelofen aufgewickelt. Nach dem Reversieren der Steckelstraße wird das Band vom Steckelofen abgezogen und in einem oder mehreren Gerüsten der Steckelstraße auf ca. 5 bis 15 mm Dicke heruntergewalzt und anschließend im eingangsseitigen Steckelofen aufgewickelt. Die Temperatur des Bandes liegt in diesem Bereich noch immer über 850°C. Nunmehr wird das Band vom eingangsseitigen Steckelofen abgewickelt und in den Steckelgerüsten sowie dem Rest der Walzstraße auf eine Dicke von ca. 1 mm heruntergewalzt und von der Wickelmaschine aufgewickelt.A production plant constructed in this way can, like conventional ones Plants operated in the austenitic area. This will be Rolled material supplied by a roughing mill or thin slab casting machine, which usually has a thickness of 50 - 100 mm, in one Oven tempered to approx. 1100 ° C and in which one or more Scaffolding existing reversing line (Steckelstraße) by queuing rolled by one or more stands and in which the Steckelstraße subsequent Steckel or reel furnace. After reversing the Steckelstraße, the strip is removed from the Steckel furnace withdrawn and in one or more scaffolding of the Steckelstraße approx. 5 to 15 mm thick rolled down and then in the input side Steckel oven wound up. The temperature of the belt is in this area still above 850 ° C. Now the tape is from on the input side of the Steckel furnace and in the Steckel stands and rolled down the rest of the rolling mill to a thickness of approximately 1 mm and wound up by the winding machine.

Nach Anspruch 2 kann zwischen der Steckelstraße und dem Rest der Walzstraße eine Heizvorrichtung vorgesehen werden, um ein zu starkes Abkühlen des Bandes zu verhindern.According to claim 2 can between the Steckelstraße and the rest of the Rolling mill can be provided to a too strong heater To prevent the tape from cooling.

Nach den Merkmalen des Anspruchs 1 kann aber auch vor dem Aufwickeln des Walzbandes in dem eingangsseitigen Steckelofen eine Kühlvorrichtung vorgesehen werden, mittels derer das ca. 5 bis 15 mm dicke Band auf Temperaturen unter 850°C gekühlt wird. Nach der ferritischen Umwandlung kann das Band in der Steckelstraße und dem Rest der Walzstraße zu einem Band mit einer Stärke von ca. 1 mm heruntergewalzt werden.According to the features of claim 1 but can also before winding of the rolled strip in the input-side Steckel furnace, a cooling device be provided, by means of which the approx. 5 to 15 mm thick Belt is cooled to temperatures below 850 ° C. According to the ferritic The tape can be converted in the Steckelstrasse and the rest rolled down the rolling mill into a strip with a thickness of approx. 1 mm become.

Um die Heizvorrichtung im Anschluß an die Steckelstraße und vor dem Rest der Walzstraße einsparen zu können, wird nach Anspruch 5 vorgeschlagen, daß alle Gerüste der Walzstraße als Reversiergerüste ausgelegt sind. Auch mit dieser Straße kann sowohl ausschließlich im austenitischen Bereich als auch im austenitischen und ferritischen Bereich gewalzt werden. Bei dieser Produktionsanlage werden im ersten Walzgang nur so viele Reversiergerüste angestellt wie sie benötigt werden, um eine Banddicke zu erreichen, die im auslaufseitigen Haspelofen gewickelt werden kann. Im zweiten Durchgang erfolgt die Anstellung derart, daß durch die Reversierstraße eine Banddicke von ca. 5 bis 15 mm erreicht wird. Auch hier wird vor dem Aufwickeln im einlaufseitigen Haspelofen durch die ein- bzw. ausgeschaltete Kühlvorrichtung entschieden, ob im folgenden Walzgang im ferritischen bzw. austenitischen Bereich gewalzt werden soll.To the heater after the Steckelstraße and before the To be able to save the rest of the rolling mill is according to claim 5 suggested that all stands of the rolling mill as reversing stands are designed. Even with this street can be both exclusively in the austenitic area as well as in the austenitic and ferritic Area to be rolled. At this production facility Only as many reversing stands were used in the first rolling pass as they were are required to achieve a strip thickness that is in the outlet side Coiler oven can be wrapped. In the second round the employment such that a strip thickness through the reversing line 5 to 15 mm is reached. Again, before winding up in the reel furnace on the inlet side by the on or off Cooling device decided whether in the following rolling pass in the ferritic or austenitic area to be rolled.

Nach Anspruch 6 besteht auch die Möglichkeit, auf den ausgangsseitigen Haspelofen zu verzichten. Dafür ist der Auslaufrollgang so vorgesehen, daß auf ihm das stranggegossene Band vorzugsweise ohne daß in der Reversierstraße gewalzt worden ist, abgelegt werden kann. Nach dem Reversieren wird das Band in der Reversierstraße auf ca. 5 bis 15 mm heruntergewalzt, wobei auch hier wieder vor dem Aufwickeln auf den eingangsseitigen Haspelofen entschieden wird, ob durch Einschalten bzw. Ausschalten der Kühlvorrichtung im folgenden Walzvorgang im ferritischen bzw. im austenitischen Bereich gewalzt werden soll.According to claim 6, there is also the possibility on the output side Dispense with reel furnace. This is the exit roller table so provided that the continuously cast tape is preferably on it without being rolled in the reversing line can. After reversing, the belt is opened in the reversing line rolled down about 5 to 15 mm, again here before the It is decided to wind up on the reel furnace on the input side, whether by switching the cooling device on or off in the following Rolling process in the ferritic or austenitic range should be rolled.

Werden am Eingang der Reversierstraße, wie es Anspruch 9 vorschlägt, zwei Haspelöfen eingesetzt, so kann der eine der Haspelöfen auf Temperaturen eingestellt sein, die für ein Walzen im austenitischen Bereich notwendig sind, während der zweite Haspelofen auf Temperaturen eingestellt werden kann, die für ein Walzen im ferritischen Bereich benötigt werden. Es besteht aber auch die Möglichkeit, beide Öfen auf Temperaturen für den ferritischen Bereich zu halten und diese alternierend zu betreiben, so daß es durch ggfs. verhältnismäßig lange Zeiten, die für die ferritische Umwandlung benötigt werden, zu keinem Stillstand der Anlage kommt.Are at the entrance of the reversing line, as proposed in claim 9, two reel ovens are used, so one of the reel ovens can be opened Temperatures must be set for rolling in austenitic Area are necessary while the second coiler is at temperatures can be set for rolling in ferritic Area are needed. But there is also the possibility of both To keep furnaces at temperatures for the ferritic range and to operate them alternately, so that it may be proportional long times needed for ferritic transformation system does not come to a standstill.

Die Erfindung wird anhand einer Zeichnung näher erläutert. Dabei zeigen

Figur 1
eine erfindungsgemäße Produktionsanlage mit einer Reversierstraße, der sich der Rest der Walzstraße als Contistraße anschließt,
Figur 2
eine erfindungsgemäße Produktionsanlage, bei der alle Gerüste als Reversiergerüste ausgelegt sind und
Figur 3
eine erfindungsgemäße Produktionsanlage, bei der alle Gerüste als Reversiergerüste ausgelegt sind, bei der jedoch an Stelle des auslaufseitigen Haspelofens ein Auslaufrollgang mit entsprechender Länge vorgesehen ist.
The invention is explained in more detail with reference to a drawing. Show
Figure 1
a production system according to the invention with a reversing line, which is followed by the rest of the rolling line as Contistrasse,
Figure 2
a production plant according to the invention, in which all scaffolding are designed as reversing scaffolding and
Figure 3
a production plant according to the invention, in which all the stands are designed as reversing stands, but in which a discharge roller table of appropriate length is provided instead of the reel furnace on the outlet side.

Figur 1 zeigt eine Stranggießanlage 1, der sich eine Schere 2, ein Ofen 3, eine Schere 4, die jedoch nur für Notschnitte gedacht ist sowie eine Entzunderungsvorrichtung 5 anschließt. Im weiteren Verlauf ist der Steckel- bzw. Haspelofen 6 zu sehen, dem eine je nach Bedarf steuerbare Kühlvorrichtung folgt, mittels derer das Band ggfs. in den ferritischen Bereich abgekühlt werden kann. Im Anschluß daran sind zwei Reversiergerüste 8, 9, eine weitere bei Bedarf einschaltbare Entzunderungsvorrichtung sowie ein auslaufseitiger Steckel- bzw. Haspelofen 11 abgebildet. Wie oben geschildert, wird das stranggegossene Vorband in dem Reversiergerüst 8, 9 auf ca. 5 bis 15 mm Stärke heruntergewalzt und im Haspelofen 6 aufgewickelt. Dabei kann das Band weiterhin austenitische Temperaturen aufweisen oder aber nach Kühlung in der Kühlvorrichtung 7 mit seiner Temperatur nur noch im ferritischen Bereich liegen.Figure 1 shows a continuous caster 1, the scissors 2, a Oven 3, a pair of scissors 4, which is only intended for emergency cuts and a descaling device 5 connects. In the further The course of the Steckel or reel furnace 6 can be seen, one each Controllable cooling device follows as required, by means of which the belt if necessary can be cooled in the ferritic range. In connection there are two reversing stands 8, 9, another if necessary switchable descaling device and an outlet side Steckel or reel furnace 11 shown. As described above, the continuously cast supporting strip in the reversing frame 8, 9 to approx. 5 rolled down to a thickness of 15 mm and wound up in the reel furnace 6. The strip can also have austenitic temperatures or after cooling in the cooling device 7 with its temperature are only in the ferritic range.

Der Reversierstraße schließt sich eine Heizvorrichtung 12, vorzugsweise ein Induktionsofen an, der das Band bei Bedarf auf die für den Rest der Walzstraße notwendige Temperatur im austenitischen bzw. ferritischen Bereich einstellt. Der Heizvorrichtung 12 folgt eine weitere Schere 13, eine Entzunderungsvorrichtung 14, die Walzstraße 15, eine Wickelmaschine 16, eine Kühlstrecke 17 und eine weitere Wickelmaschine 18.A heating device 12 preferably closes the reversing line an induction furnace, which can be used for the belt if necessary temperature required in the austenitic or ferritic range. The heater 12 follows one further scissors 13, a descaling device 14, the rolling mill 15, a winding machine 16, a cooling section 17 and another Winding machine 18.

In Figur 2 wird auf die Heizvorrichtung 12 verzichtet und der Haspelofen 11 an das Ende einer Reversierstraße gesetzt. Hier schließt sich an den Haspelofen 6 eine Kühl- und/oder Entzunderungsvorrichtung 19 an, der die Reversierstraße 20 folgt. Am Ausgang der Reversierstraße 20 ist eine weitere Kühl- und/oder Entzunderungsvorrichtung 21 vorgesehen, der sich der Haspelofen 11 anschließt.In Figure 2, the heater 12 is omitted and the Coiler furnace 11 placed at the end of a reversing line. Here is followed by a cooling and / or descaling device on the reel furnace 6 19, which is followed by the reversing line 20. At the exit of the Reversing line 20 is another cooling and / or descaling device 21 is provided, which is followed by the reel furnace 11.

Figur 3 zeigt eine ähnliche Produktionsanlage wie in Figur 2. Hier ist nach der Notschere 4 der Haspelofen 6 gezeigt, dem sich die Kühl- und/oder Entzunderungsvorrichtung 19, die Reversierstraße 20', die Entzunderungsvorrichtung 14, die Reversierstraße 20'' und ein Rollgang 22 anschließt.Figure 3 shows a similar production facility as in Figure 2. Here is shown after the emergency scissors 4, the reel furnace 6, which the Cooling and / or descaling device 19, the reversing line 20 ', the descaling device 14, the reversing line 20 ″ and a Roller table 22 connects.

Die übrigen in den Figuren 2 und 3 gezeigten ein- und ausgangs der Produktionsanlage vorgesehenen Vorrichtungen entsprechen denen nach Figur 1. The remaining input and output shown in Figures 2 and 3 The equipment provided in the production facility corresponds to that Figure 1

BezugszeichenübersichtReference symbol overview

11
StranggießanlageContinuous caster
22nd
Scherescissors
33rd
Ofenoven
44th
NotschereEmergency scissors
55
ZunderungsvorrichtungScaling device
66
HaspelofenReel furnace
77
KühlvorrichtungCooler
88th
ReversiergerüstReversing frame
99
ReversiergerüstReversing frame
1010th
EntzunderungsvorrichtungDescaling device
1111
HaspelofenReel furnace
1212th
HeizvorrichtungHeater
1313
Scherescissors
1414
EntzunderungsvorrichtungDescaling device
1515
WalzstraßeRolling mill
1616
WickelmaschineWinding machine
1717th
KühlstreckeCooling section
1818th
WickelmaschineWinding machine
1919th
Kühl- und/oder EntzunderungsvorrichtungCooling and / or descaling device
2020th
ReversierstraßeReversing line
2121
Kühl- und/oder EntzunderungsvorrichtungCooling and / or descaling device
2222
RollgangRoller table

Claims (9)

  1. Production plant for production of hot-rolled flat products, consisting of a multi-stand roll train (8, 9, 15, 20) in which at least the first stand (8) is constructed as a reversing stand, an outlet roller path with devices for cooling the hot strip and downstream winding machines (16, 18) for winding up to the strip, characterised in that a respective reel oven (6, 11) is arranged upstream and downstream of at least the first stand (8) of the roll train (20), wherein a controllable cooling device (7) is provided between the reel oven (6) placed in front and the following reversing stand (8).
  2. Production plant according to claim 1, characterised in that a heating device (12) is provided between the reversing stand (8) or the reversing stands (8, 9) and the following stand of the roll train (15).
  3. Production plant according to claim 1 or 2, characterised in that a cooling device is provided between the reversing stand (8) or the reversing stands (8, 9) and the following stands of the roll train (15).
  4. Production plant according to one of claims 1 to 3, characterised in that descaling devices (14) are associated with the cooling and/or heating devices (7, 12).
  5. Production plant according to claim 1 or 4, characterised in that all stands of the roll train (20) are constructed as reversing stands.
  6. Production plant according to claim 5, characterised in that the outlet roller path (22) has a length which allows reception of an unrolled portion of the cast strip.
  7. Production plant according to claim 6, characterised in that only the winding machine (16, 18) is arranged downstream of the roll train (20', 20").
  8. Production plant according to one of claims 1 to 7, characterised in that reel oven (6) arranged upstream of the first roll stand (8) is operable at a presettable oven temperature.
  9. Production plant according to one of claims 1 to 8, characterised in that two reel ovens preferably kept at different temperatures are arranged upstream of the first roll train (8).
EP96113523A 1995-09-06 1996-08-23 Installation for producing hot rolled thin strip Expired - Lifetime EP0761326B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19532792 1995-09-06
DE19532792 1995-09-06
DE19538341 1995-10-14
DE19538341A DE19538341A1 (en) 1995-09-06 1995-10-14 Hot strip production line for rolling thin rolled strip

Publications (2)

Publication Number Publication Date
EP0761326A1 EP0761326A1 (en) 1997-03-12
EP0761326B1 true EP0761326B1 (en) 2000-02-09

Family

ID=26018324

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96113523A Expired - Lifetime EP0761326B1 (en) 1995-09-06 1996-08-23 Installation for producing hot rolled thin strip

Country Status (7)

Country Link
US (2) US5743125A (en)
EP (1) EP0761326B1 (en)
JP (1) JP4024329B2 (en)
CN (1) CN1106233C (en)
AT (1) ATE189627T1 (en)
CA (1) CA2184798C (en)
ES (1) ES2142528T3 (en)

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GB9802443D0 (en) * 1998-02-05 1998-04-01 Kvaerner Metals Cont Casting Method and apparatus for the manufacture of light gauge steel strip
GB9803409D0 (en) * 1998-02-19 1998-04-15 Kvaerner Metals Davy Ltd Method and apparatus for the manufacture of light gauge steel strip
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CN109482646B (en) * 2018-10-31 2020-03-13 燕山大学 Dynamic variable-schedule ferrite rolling method based on endless rolling

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Also Published As

Publication number Publication date
US5910184A (en) 1999-06-08
CN1150554A (en) 1997-05-28
EP0761326A1 (en) 1997-03-12
ATE189627T1 (en) 2000-02-15
CN1106233C (en) 2003-04-23
JP4024329B2 (en) 2007-12-19
ES2142528T3 (en) 2000-04-16
US5743125A (en) 1998-04-28
CA2184798A1 (en) 1997-03-07
CA2184798C (en) 2008-04-08
JPH09122709A (en) 1997-05-13

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