EP2376240B1 - Method for producing strips of metal, and production line for performing the method - Google Patents

Method for producing strips of metal, and production line for performing the method Download PDF

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Publication number
EP2376240B1
EP2376240B1 EP09771720.1A EP09771720A EP2376240B1 EP 2376240 B1 EP2376240 B1 EP 2376240B1 EP 09771720 A EP09771720 A EP 09771720A EP 2376240 B1 EP2376240 B1 EP 2376240B1
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EP
European Patent Office
Prior art keywords
strip
temperature
hot
homogenisation
casting
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EP09771720.1A
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German (de)
French (fr)
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EP2376240A1 (en
Inventor
Rolf Franz
Karl-Heinz Spitzer
Hellfried Eichholz
Markus SCHÄPERKÖTTER
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SMS Siemag AG
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SMS Siemag AG
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Priority claimed from DE102008061206A external-priority patent/DE102008061206A1/en
Priority claimed from DE102009032358A external-priority patent/DE102009032358A1/en
Application filed by SMS Siemag AG filed Critical SMS Siemag AG
Publication of EP2376240A1 publication Critical patent/EP2376240A1/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
    • B21B1/46—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
    • 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
    • B21B1/463—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 continuous process, i.e. the cast not being cut before rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226—Hot rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material

Definitions

  • the invention relates to a method for the continuous and discontinuous production of hot-rolled strips of cast metal, in particular steel, with the features of the preamble of claim 1. Furthermore, the invention relates to a production plant for carrying out the method according to the features of the preamble of claim 9.
  • the pre-rolled hot strip is optionally controlled controlled in a substraight device controlled, heated or maintained at temperature and the edges of the hot strip are reheated.
  • the single-storey roughing road is followed by a multistorey finishing train, an outfeed roller table with a device for cooling the hot strip and upstream and downstream winding machines for winding up the hot strip.
  • the roller temperature in front of the multi-stand finishing train can be selectively adjusted by the arranged behind the roughing device for cooling, heating or holding the temperature of the hot strip either austenite or ferrite or in the transition region from austenite to ferrite.
  • a method for producing hot strips of lightweight steel is known, which is particularly well cold deep drawable and having as main elements Fe, Mn, Si and Al.
  • the pre-band produced by tape casting first passes through a device under protective gas for homogenization in connection with optionally holding the temperature, cooling or heating. Thereafter, the pre-strip is subjected to at least one pass hot rolling process with a Rescueumformungsgrad of at least 50%. After the last stitch, the hot strip is cooled and rewound. Depending on the ratio of casting to rolling speed, the hot rolling process takes place inline or decoupled.
  • the homogenization zone is intended to effect temperature equalization across the hot strip area and stress relief within the hot strip, regardless of whether the temperature level is maintained, increased or decreased.
  • the casting process there is a direct connection between the material in the liquid phase in the area of the melt application and the further process steps of the solidified material via the casting belt.
  • the casting belt is fed via a transport line for further processing.
  • the further process steps can be: straightening, rolling, cutting and winding (reeling, coiling).
  • This and other components of a casting plant can lead to tensile and mass flow fluctuations in the casting belt. If these disturbances continue in the direction of the liquid steel, casting defects and adversely affecting the casting belt may occur, such as thickness variations, overflows, edge constrictions and belt or stall separation.
  • the pre-strip produced by tape casting for homogenizing the microstructure undergoes a first homogenization zone under inert gas atmosphere in conjunction with optionally holding the temperature of the pre-strip, reducing the temperature or raising the temperature, driver, looper , Driver error.
  • the pre-band passes through a temperature adjusting device to selectively maintain the temperature of the pre-strip, to reduce the temperature of the pre-strip or to increase the temperature of the pre-strip.
  • the preliminary strip is subjected to a reduction in thickness of less than 49% in an at least one pass hot rolling process.
  • the pre-strip passes through a second homogenization zone before it is separated as a hot strip from the incoming pre-strip.
  • an argon / CO 2 nitrogen mixture is used as the inertizing gas.
  • maintaining the temperature in the range of 900-1000 ° C reducing the temperature by 200 ° C and raising the temperature by 250 ° C.
  • the material In order for the material to be bent into a coil, it must have suitable microstructures that permit deformation under tensile and compressive stress.
  • the hot strip now obtained undergoes recrystallization at least in the edge regions, at a maintained temperature of the hot strip, at a comparatively reduced temperature or at a comparatively higher temperature.
  • the material can recrystallize and it can thus absorb tensile and compressive stresses.
  • This procedure of recrystallization is particularly suitable for lightweight steels, the u. a. have a very large solidification interval, that is, which form a more or less large "temperature window" from the start of solidification from the melt to the complete solidification and have dependent on zero-strength or zero toughness temperatures.
  • the hot strip is fed to a separating device with a working speed synchronized with the rolling or conveyor belt speed, with a predetermined speed Length cut in the opening band and wound up in a winding system to form a coil.
  • the process for cutting the hot strip can also be done immediately after the hot strip has left the second homogenization zone, in which case the cut to length hot strip is guided via suitable transport facilities in a stacking plant and stacked there in the form of plates.
  • the casting process is decoupled from the rolling process.
  • the casting speed can be selected as a function of the course of the solidification process of the melt and, on the other hand, the hot rolling process can take place at a defined hot-rolled strip temperature until a predetermined degree of deformation is achieved.
  • the transport speed of the pre-strip is influenced by means of a mass flow control unit after the first process for homogenizing the microstructure. This prevents malfunctions from the subsequent process sequences within the manufacturing process, the casting process and the casting tape adversely affect, and it can, for example, to thickness variations, overflows, edge constrictions and tape or stall.
  • the production plant for carrying out the method according to the invention of a known casting machine which is under a protective gas atmosphere
  • first homogenization zone for influencing the microstructure of the cast Vorbandes is subordinate, in which the temperature of the Vorbandes is selectively held, reduced or increased.
  • the first homogenization zone is followed by a first temperature adjustment device for selectively maintaining the temperature of the pre-strip, reducing the temperature, or increasing the temperature.
  • the first temperature adjusting device with a mass flow control device between a first and second pre-belt conveyor element, is followed by a second temperature adjusting device in which the casting belt is brought to a suitable rolling temperature, optionally by maintaining the temperature of the casting belt. by reducing the temperature or by raising the temperature.
  • the second temperature adjusting device is arranged downstream of a first rolling stand, in which the preliminary strip having the suitable temperature of a thickness reduction of less than 49% is subjected to at least one pass.
  • a second homogenization zone downstream of the first rolling stand the preliminary strip is now subjected to recrystallization as a hot strip at a temperature of 700-900 ° C., in particular in the edge regions of the hot strip, so that the material has tensile or compressive forces as well as plastic deformations which occur during the Winding or stacking occur without affecting the microstructure can accommodate.
  • the second homogenization zone is followed by a separating device, which is operated at a synchronized with the transport speed of the hot strip conveyor working speed.
  • the device continuously tapered and hot rolled hot strip, wound after cutting or stacked as plates.
  • the first temperature setting device is followed by a mass flow control unit formed from a dancer roller or a loop lifter.
  • the mass flow control unit is, seen in the transport direction of the Vorbandes, arranged between a first pre-belt conveyor element and a second pre-conveyor conveyor element.
  • a second temperature setting device is arranged in front of the roll stand in which the pre-strip is brought to a suitable rolling temperature so that the pre-strip can be subjected to a hot rolling process having at least one stitch, so that the pre-strip then has a degree of deformation of less than a hot strip 49% of the total conversion.
  • the separation device in a refinement of the invention is arranged downstream of a winding or stacking device, in which the hot strip is wound into a bundle (coil) or deposited as individual plates.
  • FIG. 1 shows a schematic representation of a production plant according to the invention for carrying out the method according to the invention.
  • the production plant has a casting machine 1 in the form of a horizontal strip casting plant which comprises a conveying device in the form of a circulating conveyor belt 2 with two deflection rollers 3, 3 '.
  • the casting machine 1 is further provided with a side seal 4, which prevents discontinued melt 5 can flow down to the right and left of the conveyor 2.
  • the melt 5 is transported by means of a pan 6 to the casting machine 1 and flows through a formed in the bottom of the pan 6 opening 7 in a feed vessel 8.
  • This feed vessel 8 is formed as an overflow vessel.
  • first homogenization zone 10 This includes a thermally insulated housing 11 and a roller table.
  • This first homogenization zone may optionally be used to maintain the temperature of the casting or pre-strip 9, to further cool it down or, alternatively, to heat it up a little.
  • the casting or pre-strip 9 under an inert gas atmosphere of an argon-CO 2 nitrogen mixture as inerting a first process for homogenization of the structure optionally by maintaining a temperature at 900 - 1000 ° C, by reducing the temperature by 200 ° C or alternatively by raising the temperature by 250 ° C.
  • the casting or pre-strip 9 passes through a first temperature adjustment device 12 and is then arranged by means of a first pre-belt conveyor element 14 and a second pre-belt conveyor element 14 'by a between the first pre-conveyor conveyor element 14 and the second pre-conveyor element 14' Dancer roller or looper trained mass flow control unit 13 of a second temperature adjustment 15 is supplied.
  • this second temperature adjusting device 15 the casting or pre-strip 9 is brought to rolling temperature, before it then in a subsequent first rolling stand 16 is subjected to at least one pass a hot rolling process until the casting or pre-strip 9 has a degree of deformation of less than 49% of the total conversion.
  • the casting or pre-strip 9 is optionally maintained at a temperature of 880-940 ° C, reduced to a temperature of 50 ° C, or alternatively raised the temperature by 50 ° C.
  • the casting or pre-strip 9 is then fed to a second homogenization zone 17, in which the casting or pre-strip 9 is subjected to a second process for homogenization, in particular recrystallization of the microstructure. This is done by optionally maintaining the temperature of the casting or pre-strip 9 in the second homogenization zone 17 at a temperature of 700-900 ° C., reducing the temperature by 100 ° C. or raising the temperature by 50 ° C.
  • the casting or pre-strip 9 then passes a separating device 18 synchronized with the transport or belt speed in the form of a pair of scissors and is then fed to a winding device 19 or a stacking device 20 as a finished rolled strip separated from the casting or pre-strip 9 ,

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Metal Rolling (AREA)
  • Continuous Casting (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Description

Die Erfindung betrifft ein Verfahren zum kontinuierlichen und diskontinuierlichen Herstellen warm gewalzter Bänder aus gegossenem Metall, insbesondere Stahl, mit den Merkmalen des Oberbegriffs von Anspruch 1.
Ferner betrifft die Erfindung eine Produktionsanlage zur Durchführung des Verfahrens nach den Merkmalen des Oberbegriffs von Anspruch 9.The invention relates to a method for the continuous and discontinuous production of hot-rolled strips of cast metal, in particular steel, with the features of the preamble of claim 1.
Furthermore, the invention relates to a production plant for carrying out the method according to the features of the preamble of claim 9.

Mit einem bekannten Verfahren zum horizontalen Bandgießen ist es möglich, Schmelzen verschiedener Stahlsorten endabmessungsnah von weniger als 20mm Banddicke zu vergießen. Dabei können insbesondere Leichtbaustähle mit einem hohen Anteil an C, Mn, Al und Si vorteilhaft gefertigt werden.With a known method for horizontal strip casting, it is possible to cast melts of different steel grades close to the final dimensions of less than 20 mm strip thickness. In particular, lightweight steels with a high content of C, Mn, Al and Si can be advantageously produced.

So ist aus dem Dokument EP 1 047 510 B1 ein Produktionsverfahren zum Herstellen warm gewalzter dünner Flachprodukte bekannt. Danach wird in einer horizontalen Bandgießanlage Stahlschmelze endabmessungsnah in einem Bereich von 5mm bis 18mm Banddicke vergossen und vor dem Erreichen der eingerüstigen Vorstraße unter Schutzgasatmosphäre gesteuert gekühlt.So is from the document EP 1 047 510 B1 a production method for producing hot rolled thin flat products known. Thereafter, in a horizontal strip casting plant, molten steel is poured close to the final dimensions in a range of 5 mm to 18 mm strip thickness and cooled under the protective gas atmosphere before it reaches the monolithic roughing line.

Das vorgewalzte Warmband wird in einer der Vorstraße nachgeordneten Einrichtung wahlweise gesteuert gekühlt, erwärmt oder auf Temperatur gehalten und die Kanten des Warmbandes werden nachgewärmt.The pre-rolled hot strip is optionally controlled controlled in a substraight device controlled, heated or maintained at temperature and the edges of the hot strip are reheated.

Der eingerüstigen Vorstraße folgen eine mehrgerüstige Fertigstraße, ein Auslaufrollgang mit einer Einrichtung zum Kühlen des Warmbandes sowie vor- und nachgeordnete Wickelmaschinen zum Aufwickeln des Warmbandes.The single-storey roughing road is followed by a multistorey finishing train, an outfeed roller table with a device for cooling the hot strip and upstream and downstream winding machines for winding up the hot strip.

Die Walzentemperatur vor der mehrgerüstigen Fertigstraße kann durch die hinter der Vorstraße angeordnete Einrichtung zum Kühlen, Heizen oder Halten der Temperatur des Warmbandes wahlweise im Austenit- oder Ferritbereich oder im Übergangsbereich von Austenit zu Ferrit gezielt eingestellt werden.The roller temperature in front of the multi-stand finishing train can be selectively adjusted by the arranged behind the roughing device for cooling, heating or holding the temperature of the hot strip either austenite or ferrite or in the transition region from austenite to ferrite.

Aus dem Dokument WO 2006/066551 A1 ist des Weiteren ein Verfahren zum Herstellen von Warmbändern aus Leichtbaustahl bekannt, der insbesondere gut kalt tiefziehfähig ist und der als Hauptelemente Fe, Mn, Si und Al aufweist.
Das durch Bandgießen erzeugte Vorband durchläuft zunächst eine unter Schutzgas stehende Einrichtung zur Homogenisierung in Verbindung mit einem wahlweise Halten der Temperatur, einem Kühlen oder Heizen. Daraufhin wird das Vorband einem wenigstens einen Stich aufweisenden Warmwalzprozess mit einem Gesamtumformungsgrad von mindestens 50% unterzogen. Nach dem letzten Stich wird das Warmband abgekühlt und aufgehaspelt.
In Abhängigkeit des Verhältnisses von Gieß- zu Walzgeschwindigkeit erfolgt der Warmwalzprozess inline oder entkoppelt.From the document WO 2006/066551 A1 Furthermore, a method for producing hot strips of lightweight steel is known, which is particularly well cold deep drawable and having as main elements Fe, Mn, Si and Al.
The pre-band produced by tape casting first passes through a device under protective gas for homogenization in connection with optionally holding the temperature, cooling or heating. Thereafter, the pre-strip is subjected to at least one pass hot rolling process with a Gesamtumformungsgrad of at least 50%. After the last stitch, the hot strip is cooled and rewound.
Depending on the ratio of casting to rolling speed, the hot rolling process takes place inline or decoupled.

Die Homogenisierungszone soll einen Temperaturausgleich über die Fläche des Warmbandes und einen Spannungsabbau innerhalb des Warmbandes bewirken, unabhängig davon, ob das Temperaturniveau gehalten, erhöht oder abgesenkt wird.The homogenization zone is intended to effect temperature equalization across the hot strip area and stress relief within the hot strip, regardless of whether the temperature level is maintained, increased or decreased.

Die Frage ob der Walzprozess inline oder entkoppelt vom Gießprozess erfolgen soll, wird im Wesentlichen von den unterschiedlichen Geschwindigkeiten beim Gießen und Walzen abhängig gemacht, wobei auch das Rekristallisationsverhalten des Materials von Bedeutung ist.The question of whether the rolling process is to take place inline or decoupled from the casting process is essentially made dependent on the different speeds of casting and rolling, whereby the recrystallization behavior of the material is also important.

Bei dem Gießprozess ist eine direkte Verbindung vom Material in der Flüssigphase im Bereich der Schmelzeaufgabe und den weiterführenden Verfahrensschritten des erstarrten Materials über das Gießband gegeben.
Das Gießband wird über eine Transportstrecke der Weiterverarbeitung zugeführt. Die weiteren Verfahrensschritte können sein: Richten, Walzen, Schneiden und Aufwickeln (Haspeln, Coilen). Durch diese und weitere Komponenten einer Gießanlage kann es zu Zug- und Massestromschwankungen im Gießband kommen. Setzen sich diese Störungen in Richtung des flüssigen Stahls fort, kann es zu Gießstörungen und zur negativen Beeinflussung des Gießbandes kommen, wie zum Beispiel Dickenschwankungen, Überströmungen, Kanteneinschnürungen und Band- oder Strömungsabriss.In the casting process, there is a direct connection between the material in the liquid phase in the area of the melt application and the further process steps of the solidified material via the casting belt.
The casting belt is fed via a transport line for further processing. The further process steps can be: straightening, rolling, cutting and winding (reeling, coiling). This and other components of a casting plant can lead to tensile and mass flow fluctuations in the casting belt. If these disturbances continue in the direction of the liquid steel, casting defects and adversely affecting the casting belt may occur, such as thickness variations, overflows, edge constrictions and belt or stall separation.

Es ist Aufgabe der Erfindung, ein Verfahren zum Herstellen von Warmband auf einer Bandgießanlage und eine Bandgießanlage mit Aufwickeleinrichtung oder Stapeleinrichtung derart weiterzubilden, dass die dem Gießprozess folgenden Verfahrensschritte keine negativen Einflüsse auf das herzustellende Gießband im Hinblick auf dessen Qualität und dessen Materialeigenschaften haben und dass das Gießband nach dem Gießprozess in vorgegebene Größeneinheiten, die transportfähig bzw. lagerfähig sind, wie z. B. gestapelte Bleche oder Bunde (Coils), aufteilbar ist.It is an object of the invention to develop a method for producing hot strip on a strip casting and a strip casting with winding or stacking device such that the casting process following process steps have no negative impact on the casting tape to be produced in terms of its quality and material properties and that Casting belt after the casting process in predetermined size units that are transportable or storable, such. B. stacked sheets or coils (coils), is divisible.

Die Aufgabe wird erfindungsgemäß durch die Merkmale der unabhängigen Patentansprüche 1 und 8 gelöst.The object is achieved by the features of the independent claims 1 and 8.

Demgemäß durchläuft nach den kennzeichnenden Merkmalen des Anspruchs 1 das durch Bandgießen hergestellte Vorband zur Homogenisierung der Gefügestruktur eine unter Schutzgas-Atmosphäre stehende erste Homogenisierungszone in Verbindung mit einem wahlweisen Halten der Temperatur des Vorbandes, einem Reduzieren der Temperatur oder einem Erhöhen der Temperatur, Treiber, Looper, Treiberfehler. Nachfolgend durchläuft das Vorband eine Temperatureinstellvorrichtung, um wahlweise die Temperatur des Vorbandes zu halten, die Temperatur des Vorbandes zu reduzieren oder die Temperatur des Vorbandes zu erhöhen. Im weiteren Verlauf wird das Vorband in einem mindestens einen Stich aufweisenden Warmwalzprozess einer Dickenreduktion von kleiner 49 % unterzogen. Nachfolgend durchläuft das Vorband eine zweite Homogenisierungszone bevor es als Warmband von dem nachkommenden Vorband getrennt wird.Accordingly, according to the characterizing features of claim 1, the pre-strip produced by tape casting for homogenizing the microstructure undergoes a first homogenization zone under inert gas atmosphere in conjunction with optionally holding the temperature of the pre-strip, reducing the temperature or raising the temperature, driver, looper , Driver error. Subsequently, the pre-band passes through a temperature adjusting device to selectively maintain the temperature of the pre-strip, to reduce the temperature of the pre-strip or to increase the temperature of the pre-strip. In the further course, the preliminary strip is subjected to a reduction in thickness of less than 49% in an at least one pass hot rolling process. Subsequently, the pre-strip passes through a second homogenization zone before it is separated as a hot strip from the incoming pre-strip.

In der ersten Homogenisierungszone wird ein Argon/CO2 -Stickstoff-Gemisch als Inertisierungsgas verwendet. In der ersten Homogenisierungszone erfolgt ein Halten der Temperatur im Bereich von 900 -1000 °C, ein Reduzieren der Temperatur um 200 °C und ein Erhöhen der Temperatur um 250 °C.In the first homogenization zone, an argon / CO 2 nitrogen mixture is used as the inertizing gas. In the first homogenizing zone, maintaining the temperature in the range of 900-1000 ° C, reducing the temperature by 200 ° C and raising the temperature by 250 ° C.

Damit das Material zu einem Bund (Coil) gebogen werden kann, muss es geeignete Gefügestrukturen besitzen, die eine Verformung bei auftretender Zug-und Druckspannung zulassen.In order for the material to be bent into a coil, it must have suitable microstructures that permit deformation under tensile and compressive stress.

Diese Gefügeeigenschaften lassen sich durch den mindestens einen Walzvorgang mit einem Stich bis zu einem Umformungsgrad von 49 % erreichen.These structural properties can be achieved by the at least one rolling process with a stitch up to a degree of deformation of 49%.

Durch diesen Umformprozess wird eine Rekristallisation des Materials angestoßen. In der anschließenden zweiten Homogenisierungszone erfährt das nunmehr erhaltene Warmband eine mindestens in den Randbereichen erfolgte Rekristallisation, bei einer gehaltenen Temperatur des Warmbandes, bei einer vergleichsweise reduzierten Temperatur oder bei einer vergleichsweise höhleren Temperatur.Through this forming process recrystallization of the material is initiated. In the subsequent second homogenization zone, the hot strip now obtained undergoes recrystallization at least in the edge regions, at a maintained temperature of the hot strip, at a comparatively reduced temperature or at a comparatively higher temperature.

In der dem ersten Walzgerüst nachgeordneten zweiten Homogenisierungszone kann das Material rekristallisieren und es kann damit Zug- und Druckspannungen aufnehmen. Diese Vorgehensweise der Rekristallisation eignet sich insbesondere bei Leichtbaustählen, die u. a. einen sehr großen Erstarrungsintervall aufweisen können, das heißt, die ein mehr oder weniger großes "Temperaturfenster" vom Beginn der Erstarrung aus der Schmelze bis zur vollständigen Durcherstarrung ausbilden und davon abhängig Null-Festigkeits- bzw. Null-Zähigkeitstemperaturen besitzen.In the first homogenization zone downstream of the first rolling stand, the material can recrystallize and it can thus absorb tensile and compressive stresses. This procedure of recrystallization is particularly suitable for lightweight steels, the u. a. have a very large solidification interval, that is, which form a more or less large "temperature window" from the start of solidification from the melt to the complete solidification and have dependent on zero-strength or zero toughness temperatures.

Nachdem das Vorband die zweite Homogenisierungszone durchlaufen hat, wird das Warmband einer Trenneinrichtung mit zur Walz- bzw. Transportbandgeschwindigkeit synchronisierter Arbeitsgeschwindigkeit zugeführt, mit vorbestimmter Länge im Vorband abgeschnitten und in einer Wickelanlage zu einem Bund (Coil) aufgewickelt.After the pre-strip has passed through the second homogenization zone, the hot strip is fed to a separating device with a working speed synchronized with the rolling or conveyor belt speed, with a predetermined speed Length cut in the opening band and wound up in a winding system to form a coil.

Der Vorgang zum Schneiden des Warmbandes kann aber auch bereits unmittelbar nachdem das Warmband die zweite Homogenisierungszone verlassen hat erfolgen, wobei dann das auf Länge geschnittene Warmband über geeignete Transporteinrichtungen in eine Stapelanlage geführt und dort in Form von Platten gestapelt wird.However, the process for cutting the hot strip can also be done immediately after the hot strip has left the second homogenization zone, in which case the cut to length hot strip is guided via suitable transport facilities in a stacking plant and stacked there in the form of plates.

In Ausgestaltung des erfindungsgemäßen Verfahrens ist der Gießprozess vom Walzprozess entkoppelt.In an embodiment of the method according to the invention, the casting process is decoupled from the rolling process.

Damit ist der Vorteil verbunden, dass zum einen die Gießgeschwindigkeit in Abhängigkeit vom Verlauf des Erstarrungsprozess der Schmelze gewählt werden kann und dass zum anderen der Warmwalzprozess bei einer definierten Warmbandtemperatur, bis zum Erreichen eines vorgegebenen Umformungsgrades erfolgen kann.This has the advantage that, on the one hand, the casting speed can be selected as a function of the course of the solidification process of the melt and, on the other hand, the hot rolling process can take place at a defined hot-rolled strip temperature until a predetermined degree of deformation is achieved.

In weiterer Ausgestaltung des erfindungsgemäßen Verfahrens wird nach dem ersten Prozess zur Homogenisierung der Gefügestruktur die Transportgeschwindigkeit des Vorbandes mittels einer Massestromregeleinheit beeinflusst. Damit wird verhindert, dass Störungen aus den nachfolgenden Prozessabläufen innerhalb des Herstellungsverfahrens den Gießvorgang und das Gießband negativ beeinflussen, und es zum beispiel zu Dickenschwankungen, zu Überströmungen, zu Kanteneinschnürungen und zu Band- oder Strömungsabriss kommen kann.In a further embodiment of the method according to the invention, the transport speed of the pre-strip is influenced by means of a mass flow control unit after the first process for homogenizing the microstructure. This prevents malfunctions from the subsequent process sequences within the manufacturing process, the casting process and the casting tape adversely affect, and it can, for example, to thickness variations, overflows, edge constrictions and tape or stall.

Nach den Merkmalen des Patentanspruchs 9 besteht die Produktionsanlage zur Durchführung des erfindungsgemäßen Verfahrens aus einer an sich bekannten Gießmaschine, der eine unter einer Schutzgas-Atmosphäre stehende erste Homogenisierungszone zur Beeinflussung der Gefügestruktur des gegossenen Vorbandes nachgeordnet ist, in der die Temperatur des Vorbandes wahlweise gehalten, reduziert oder erhöht wird.
Der ersten Homogenisierungszone ist eine erste Temperatureinstellvorrichtung zum wahlweisen Halten der Temperatur des Vorbandes, zum Reduzieren der Temperatur oder zum Erhöhen der Temperatur nachgeordnet.
In Transportrichtung des Vorbandes gesehen, ist der ersten Temperatureinstellvorrichtung, unter Einordnung einer Massenflussregeleinrichtung zwischen einem ersten und zweiten Vorband-Förderelement, eine zweite Temperatureinstellvorrichtung nachgeordnet, in der das Gießband auf eine geeignete Walztemperatur gebracht wird, und zwar wahlweise durch Halten der Temperatur des Gießbandes, durch Reduzieren der Temperatur oder durch Erhöhen der Temperatur.According to the features of claim 9, the production plant for carrying out the method according to the invention of a known casting machine, which is under a protective gas atmosphere first homogenization zone for influencing the microstructure of the cast Vorbandes is subordinate, in which the temperature of the Vorbandes is selectively held, reduced or increased.
The first homogenization zone is followed by a first temperature adjustment device for selectively maintaining the temperature of the pre-strip, reducing the temperature, or increasing the temperature.
As seen in the transport direction of the pre-strip, the first temperature adjusting device, with a mass flow control device between a first and second pre-belt conveyor element, is followed by a second temperature adjusting device in which the casting belt is brought to a suitable rolling temperature, optionally by maintaining the temperature of the casting belt. by reducing the temperature or by raising the temperature.

Der zweiten Temperatureinstellvorrichtung ist ein erstes Walzgerüst nachgeordnet, in dem mit wenigstens einem Stich das Vorband mit der geeigneten Temperatur einer Dickenreduktion von kleiner 49 % unterzogen wird. In einer dem ersten Walzgerüst nachgeordneten zweiten Homogenisierungszone wird das Vorband nunmehr als Warmband bei einer Temperatur von 700 - 900°C einer Rekristallisation, insbesondere in den Randbereichen des Warmbandes unterworfen, so dass das Material Zug- bzw. Druckkräfte als auch plastische Verformungen, die beim Wickeln oder Stapeln auftreten, ohne Beeinträchtigung der Gefügestruktur aufnehmen kann.
Schließlich ist der zweiten Homogenisierungszone eine Trenneinrichtung nachgeordnet, die mit einer mit der Transportgeschwindigkeit der Warmband-Fördereinrichtung synchronisierte Arbeitsgeschwindigkeit betrieben wird. In der Trenneinrichtung wird das der Einrichtung kontinuierlich zulaufende und warm gewalzte Warmband, nach dem Schneiden aufgewickelt oder als Platten gestapelt.
In weiterer Ausgestaltung der erfindungsgemäßen Produktionsanlage ist der ersten Temperatureinstellvorrichtung eine aus einer Tänzerwalze oder einen Schlingenheber ausgebildete Massenstromregeleinheit nachgeordnet. Die Massenstromregeleinheit ist dabei, in Transportrichtung des Vorbandes gesehen, zwischen einem ersten Vorband-Förderelement und einem zweiten Vorband-Förderelement eingeordnet.
Des Weiteren ist in Ausgestaltung der Erfindung vor dem Walzgerüst eine zweite Temperatureinstellvorrichtung angeordnet, in der das Vorband auf eine geeignete Walztemperatur gebracht wird, damit das Vorband einem wenigstens einen Stich aufweisenden Warmwalzprozess unterzogen werden kann, so dass das Vorband dann als Warmband einen Umformungsgrad von kleiner 49% der Gesamtumformung aufweist.The second temperature adjusting device is arranged downstream of a first rolling stand, in which the preliminary strip having the suitable temperature of a thickness reduction of less than 49% is subjected to at least one pass. In a second homogenization zone downstream of the first rolling stand, the preliminary strip is now subjected to recrystallization as a hot strip at a temperature of 700-900 ° C., in particular in the edge regions of the hot strip, so that the material has tensile or compressive forces as well as plastic deformations which occur during the Winding or stacking occur without affecting the microstructure can accommodate.
Finally, the second homogenization zone is followed by a separating device, which is operated at a synchronized with the transport speed of the hot strip conveyor working speed. In the separator, the device continuously tapered and hot rolled hot strip, wound after cutting or stacked as plates.
In a further embodiment of the production system according to the invention, the first temperature setting device is followed by a mass flow control unit formed from a dancer roller or a loop lifter. The mass flow control unit is, seen in the transport direction of the Vorbandes, arranged between a first pre-belt conveyor element and a second pre-conveyor conveyor element.
Furthermore, in a refinement of the invention, a second temperature setting device is arranged in front of the roll stand in which the pre-strip is brought to a suitable rolling temperature so that the pre-strip can be subjected to a hot rolling process having at least one stitch, so that the pre-strip then has a degree of deformation of less than a hot strip 49% of the total conversion.

Schließlich ist der Trenneinrichtung in Ausgestaltung der Erfindung eine Wickel-oder Stapelvorrichtung nachgeordnet, in der das Warmband zu einem Bund (Coil) gewickelt oder als einzelne Platten abgelegt wird.Finally, the separation device in a refinement of the invention is arranged downstream of a winding or stacking device, in which the hot strip is wound into a bundle (coil) or deposited as individual plates.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung des in der Zeichnung dargestellten Ausführungsbeispiels.
In der Zeichnung zeigt:

Fig.1
schematisch die Produktionsanlage zur Durchführung des erfindungsgemäßen Verfahrens zum endabmessungsnahen Bandgießen mit Wickel- bzw. Stapeleinrichtung.
Further features and advantages of the invention will become apparent from the following description of the embodiment shown in the drawing.
In the drawing shows:
Fig.1
schematically the production plant for carrying out the method according to the invention for near-net-shape strip casting with winding or stacking device.

Die einzige Figur 1 zeigt in schematischer Darstellung eine erfindungsgemäße Produktionsanlage zur Durchführung des erfindungsgemäßen Verfahrens. Die Produktionsanlage weist zur Durchführung des Gießverfahrens oder Gießprozesses eine Gießmaschine 1 in Form einer horizontalen Bandgießanlage auf, die eine Fördereinrichtung in Form eines umlaufenden Förderbandes 2 mit zwei Umlenkrollen 3, 3' umfasst. Die Gießmaschine 1 ist weiterhin mit einer Seitenabdichtung 4 versehen, die verhindert, dass aufgegebene Schmelze 5 rechts und links von der Fördereinrichtung 2 herunterfließen kann. Die Schmelze 5 wird mittels einer Pfanne 6 an die Gießmaschine 1 transportiert und fließt durch eine im Boden der Pfanne 6 ausgebildete Öffnung 7 in ein Zulaufgefäß 8. Dieses Zulaufgefäß 8 ist wie ein Überlaufgefäß ausgebildet.The only FIG. 1 shows a schematic representation of a production plant according to the invention for carrying out the method according to the invention. For carrying out the casting process or casting process, the production plant has a casting machine 1 in the form of a horizontal strip casting plant which comprises a conveying device in the form of a circulating conveyor belt 2 with two deflection rollers 3, 3 '. The casting machine 1 is further provided with a side seal 4, which prevents discontinued melt 5 can flow down to the right and left of the conveyor 2. The melt 5 is transported by means of a pan 6 to the casting machine 1 and flows through a formed in the bottom of the pan 6 opening 7 in a feed vessel 8. This feed vessel 8 is formed as an overflow vessel.

Nicht näher dargestellt sind die Einrichtungen zur intensiven Kühlung der Unterseite des Obertrums der Fördereinrichtung 2 sowie die vollständige Einhausung der Gießmaschine 1 mit entsprechender Schutzgasatmosphäre.Not shown in detail are the means for intensive cooling of the underside of the upper run of the conveyor 2 and the complete enclosure of the casting machine 1 with a corresponding protective gas atmosphere.

Nach Aufgabe der Schmelze 5 auf das umlaufende Förderband der Fördereinrichtung 2 kommt es infolge der intensiven Kühlung zur Erstarrung und Bildung eines Gieß- oder Vorbandes 9, das am Ende der Fördereinrichtung 2 weitestgehend durcherstarrt ist.After application of the melt 5 on the rotating conveyor belt of the conveyor 2, it comes as a result of intensive cooling to solidification and formation of a casting or pre-strip 9, which is solidified at the end of the conveyor 2 largely.

Zum Temperaturausgleich und Spannungsabbau schließt sich an die Gießmaschine 1 eine erste Homogenisierungszone 10 an. Diese umfasst eine wärmegedämmte Einhausung 11 und einen Rollgang. Diese erste Homogenisierungszone kann wahlweise dazu benutzt werden, die Temperatur des Gieß- oder Vorbandes 9 zu halten, weiter abzukühlen oder alternativ etwas aufzuheizen. Insbesondere ist vorgesehen, dass in dieser ersten Homogenisierungszone 10 das Gieß- oder Vorband 9 unter einer Schutzgasatmosphäre aus einem Argon-CO2-Stickstoff-Gemisch als Inertisierungsgas einem ersten Prozess zur Homogenisierung des Gefüges wahlweise durch Halten einer Temperatur bei 900 - 1000 °C, durch Reduzieren der Temperatur um 200 °C oder alternativ durch Erhöhen der Temperatur um 250 °C ausgesetzt wird.For temperature compensation and stress relief, the casting machine 1 is followed by a first homogenization zone 10. This includes a thermally insulated housing 11 and a roller table. This first homogenization zone may optionally be used to maintain the temperature of the casting or pre-strip 9, to further cool it down or, alternatively, to heat it up a little. In particular, it is provided that in this first homogenization zone 10, the casting or pre-strip 9 under an inert gas atmosphere of an argon-CO 2 nitrogen mixture as inerting a first process for homogenization of the structure optionally by maintaining a temperature at 900 - 1000 ° C, by reducing the temperature by 200 ° C or alternatively by raising the temperature by 250 ° C.

Nachfolgend durchläuft das Gieß- oder Vorband 9 eine erste Temperatureinstellvorrichtung 12 und wird dann mittels eines ersten Vorband-Förderelementes 14 und eines zweiten Vorband-Förderelementes 14' durch eine zwischen dem ersten Vorband-Förderelement 14 und dem zweiten Vorband-Förderelement 14' angeordnete, aus Tänzerwalze oder Schlingenheber ausgebildete Massenstromregeleinheit 13 einer zweiten Temperatureinstellvorrichtung 15 zugeführt. In dieser zweiten Temperatureinstellvorrichtung 15 wird das Gieß- oder Vorband 9 auf Walztemperatur gebracht, bevor es dann in einem nachfolgenden ersten Walzgerüst 16 unter Durchführung mindestens eines Stiches einem Warmwalzprozess unterzogen wird, bis das Gieß- oder Vorband 9 einen Umformungsgrad von kleiner 49% der Gesamtumformung aufweist. In dieser zweiten Temperatureinstellvorrichtung 15 wird das Gieß- oder Vorband 9 wahlweise auf einer Temperatur von 880 - 940 °C gehalten, um eine Temperatur von 50 °C reduziert oder alternativ die Temperatur um 50 °C erhöht. Nach Durchlaufen des ersten Walzgerüstes 16 wird das Gieß- oder Vorband 9 anschließend einer zweiten Homogenisierungszone 17 zugeführt, in welcher das Gieß- oder Vorband 9 einem zweiten Prozess zur Homogenisierung, insbesondere Rekristallisation der Gefügestruktur, unterzogen wird. Dies geschieht dadurch, dass wahlweise die Temperatur des Gieß-oder Vorbandes 9 in der zweiten Homogenisierungszone 17 auf einer Temperatur bei 700 - 900 °C gehalten wird, die Temperatur um 100 °C reduziert oder die Temperatur um 50 °C erhöht wird. Nachfolgend zur zweiten Homogenisierungszone 17 passiert das Gieß- oder Vorband 9 dann eine mit der Transport- oder Bandgeschwindigkeit synchronisierte Trenneinrichtung 18 in Form einer Schere und wird danach als fertig gewalztes und vom Gieß- oder Vorband 9 abgetrenntes Warmband einer Wickeleinrichtung 19 oder einer Stapeleinrichtung 20 zugeführt.Subsequently, the casting or pre-strip 9 passes through a first temperature adjustment device 12 and is then arranged by means of a first pre-belt conveyor element 14 and a second pre-belt conveyor element 14 'by a between the first pre-conveyor conveyor element 14 and the second pre-conveyor element 14' Dancer roller or looper trained mass flow control unit 13 of a second temperature adjustment 15 is supplied. In this second temperature adjusting device 15, the casting or pre-strip 9 is brought to rolling temperature, before it then in a subsequent first rolling stand 16 is subjected to at least one pass a hot rolling process until the casting or pre-strip 9 has a degree of deformation of less than 49% of the total conversion. In this second temperature adjusting device 15, the casting or pre-strip 9 is optionally maintained at a temperature of 880-940 ° C, reduced to a temperature of 50 ° C, or alternatively raised the temperature by 50 ° C. After passing through the first roll stand 16, the casting or pre-strip 9 is then fed to a second homogenization zone 17, in which the casting or pre-strip 9 is subjected to a second process for homogenization, in particular recrystallization of the microstructure. This is done by optionally maintaining the temperature of the casting or pre-strip 9 in the second homogenization zone 17 at a temperature of 700-900 ° C., reducing the temperature by 100 ° C. or raising the temperature by 50 ° C. Subsequent to the second homogenization zone 17, the casting or pre-strip 9 then passes a separating device 18 synchronized with the transport or belt speed in the form of a pair of scissors and is then fed to a winding device 19 or a stacking device 20 as a finished rolled strip separated from the casting or pre-strip 9 ,

Claims (14)

  1. Method for continuous or discontinuous production of hot-rolled strips from cast metal, particularly steel, according to which the cast strip as pre-strip is subjected to at least one heat treatment process and is subsequently coiled or stacked as hot strip, characterised in that the pre-strip obtained after the casting process is exposed to an atmosphere, which stands under protective gas, in conjunction with a first process for homogenisation of the structure selectably by maintenance of a temperature at 900 - 1,000° C, by reducing the temperature by 200° C or by increasing the temperature by 250° C, that the pre-strip after the first homogenisation process is subjected to at least one further heat treatment selectably by maintenance of the temperature at 880 - 940° C, by reducing the temperature by 50° C or by increasing the temperature by 50° C, that the pre-strip is in the further course subjected to a hot-rolling process comprising at least one pass, wherein the pre-strip is subjected to a thickness reduction of less than 49%, that the pre-strip is thereupon subjected to a second process for homogenisation or for recrystallisation of the structure selectably by maintenance of the temperature at 700 - 900° C, by reducing the temperature by 100° C or by increasing the temperature by 50° C, and that the pre-strip subsequently passes a separating device synchronised with the transport or strip speed and is separated as rolled hot strip from the pre-strip.
  2. Method according to claim 1, characterised in that the casting process is decoupled from the rolling process.
  3. Method according to one of the preceding claims, characterised in that the transport speed of the pre-strip is influenced by means of a mass/flow regulating unit.
  4. Method according to claims 1 to 3, characterised in that the pre-strip prior to hot-rolling is subjected to a second heat treatment selectably by maintenance of the temperature at 880 - 940° C, by reducing the temperature by 50° C or by increasing the temperature by 50° C.
  5. Method according to claims 1 to 4, characterised in that the pre-strip is hot-rolled after the second heat treatment.
  6. Method according to claims 1 to 5, characterised in the pre-strip after the hot-rolling is exposed to a second homogenisation process, particularly for recrystallisation of the pre-strip in the edge regions, selectably by maintenance of the strip at 700 - 900° C, by reducing the temperature by 100° C or by increasing the temperature by 50° C.
  7. Method according to claims 1 to 6, characterised in that the pre-strip after the second homogenisation process passes, as hot strip, a separating device synchronised with the transport speed of the pre-strip and the pre-strip is subsequently coiled or stacked as hot strip.
  8. Production plant for carrying out the method according to one or more of claims 1 to 7, with at least one casting machine (1) for producing a cast strip or pre-strip (9) of predetermined thickness, with at least one conveying device (2) for transport of the cast strip, with at least one homogenisation zone (10), in which for influencing the structure of the cast strip or pre-strip the temperature is maintained, reduced or increased, with at least one further temperature zone, in which the temperature is maintained, reduced or increased, with at least one first roll stand (16) for achieving partial reshaping of the pre-strip (9), with at least one separating device (18) and with at least one coiling or stacking device (19; 20), wherein arranged downstream of the casting machine (1) is a first homogenisation zone (10), which stands under a protective gas atmosphere and in which the temperature is selectably maintained, reduced or increased, characterised in that arranged downstream of the first homogenisation zone (10) is a temperature setting device (15) for selectably maintaining the temperature, reducing the temperature or increasing the temperature, that arranged downstream of the temperature setting device (15) is a first roll stand (16), in which the pre-strip is subjected to a thickness reduction of less than 49% by at least one pass, that arranged downstream of the roll stand (16) is a second homogenisation zone (17), in which the temperature is selectably maintained, reduced or increased in order to achieve recrystallisation of the hot strip at least in the edge regions and that arranged downstream of the second homogenisation zone (17) is a separating device (18), the working speed of which is synchronised with the speed of the conveying device (2) and in which the pre-rolled pre-strip (9), as hot strip, is separated from the pre-strip.
  9. Production plant according to claim 8, characterised in that the casting process is decoupled from the rolling process.
  10. Production plant according to claim 8 or 9, characterised in that arranged downstream of the first homogenisation zone (10) is a mass/flow regulating unit (13) constructed from a dancer roller or loop lifter.
  11. Production plant according to any one of claims 8 to 10, characterised in that a mass/flow regulating unit (13) is arranged between a first pre-strip conveying element (14) and a second pre-strip conveying element (14) as seen in transport direction of the pre-strip (9).
  12. Production plant according to any one of claims 8 to 11, characterised in that a first temperature setting device (12) and a mass/flow regulating unit (13) are arranged downstream of the first homogenisation zone (10) in transport direction of the strip, wherein the mass/flow regulating unit (13) is upstream of the second temperature setting device (15).
  13. Production plant according to claim 12, characterised in that a conveying element (14, 14') is arranged between the first temperature setting device (12) and the mass/flow regulating unit (13) and/or between the mass/flow regulating unit (13) and the second temperature setting device (15).
  14. Production plant according to any one of claims 8 to 13, characterised in that a coiling device (19) or a stacking device (20) is arranged downstream of the separating device (18).
EP09771720.1A 2008-12-09 2009-12-09 Method for producing strips of metal, and production line for performing the method Active EP2376240B1 (en)

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DE102008061206A DE102008061206A1 (en) 2008-01-15 2008-12-09 Method for continuous or discontinuous production of hot-rolled strips made of steel, comprises subjecting a cast strip as a pre-strip to a first thermal treatment process, and subsequently winding and stacking as a hot strip
DE102009032358A DE102009032358A1 (en) 2008-12-09 2009-07-08 Method for continuous or discontinuous production of hot rolled strips from steel, comprises subjecting a cast strip as pre-band to a heat treatment process and subsequently rolling up or stacking as hot-rolled strip
PCT/EP2009/008795 WO2010066412A1 (en) 2008-12-09 2009-12-09 Method for producing strips of metal, and production line for performing the method

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