EP2376240A1 - 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

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Publication number
EP2376240A1
EP2376240A1 EP09771720A EP09771720A EP2376240A1 EP 2376240 A1 EP2376240 A1 EP 2376240A1 EP 09771720 A EP09771720 A EP 09771720A EP 09771720 A EP09771720 A EP 09771720A EP 2376240 A1 EP2376240 A1 EP 2376240A1
Authority
EP
European Patent Office
Prior art keywords
temperature
strip
hot
casting
homogenization
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP09771720A
Other languages
German (de)
French (fr)
Other versions
EP2376240B1 (en
Inventor
Rolf Franz
Karl-Heinz Spitzer
Hellfried Eichholz
Markus SCHÄPERKÖTTER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Siemag AG
Original Assignee
SMS Siemag AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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
Application granted granted Critical
Publication of EP2376240B1 publication Critical patent/EP2376240B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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.
  • EP 1 047 510 B1 discloses a production method for producing hot rolled thin flat products. 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.
  • the pre-rolled hot-rolled strip is optionally cooled, heated or kept to temperature in a facility downstream of the roughing train and the edges of the hot-rolled strip are reheated.
  • the single-storey roughing road is followed by a multistorey finishing train, a discharge 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.
  • the document WO 2006/066551 A1 furthermore discloses a method for producing hot strips of lightweight steel, which in particular is readily cold-drawable and which has Fe, Mn 1 Si and Al as the main elements.
  • 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, this can lead to casting defects and negative influence on the casting belt, such as thickness variations, overflows, edge lacing 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 setting device in order to optionally maintain the temperature of the pre-strip, to reduce the temperature of the pre-strip or to raise 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 being separated as a hot strip from the incoming pre-strip.
  • a first homogenization zone an argon / CO 2 nitrogen mixture is used as the inertizing gas.
  • the temperature is maintained in the range of 900-1000 ° C., the temperature is reduced by 200 ° C., and the temperature is raised 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 now obtained hot strip undergoes recrystallization, at least in the peripheral areas, 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. may 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 complete solidification and have zero-toughness or zero toughness dependent thereon.
  • the hot strip is fed to a separating device with a working speed synchronized to the rolling or transport belt speed. of a certain length cut off in the opening band and wound up in a winding system into 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. This prevents disturbances from the subsequent process sequences within the manufacturing process from adversely affecting the casting process and the casting belt, and can lead to thickness fluctuations, overflows, edge constrictions, and belt or stall, for example.
  • 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.
  • the pre-strip is now as a hot strip at a temperature of 700 - subjected to 900 0 C of a recrystallization, in particular in the edge regions of the hot strip, so that the material tension or compression forces as well as plastic deformation, which in 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 in the transport direction of the pre-strip gese- hen, between a first Vorband conveying element and a second Vorband-conveying element arranged.
  • 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 undergoes 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 schematically the production plant for carrying out the method according to the invention for near-net-shape strip casting with winding or stacking device.
  • the sole FIGURE 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, or alternatively to heat it up somewhat.
  • the casting or pre-strip 9 under an inert gas atmosphere of an argon C0 2 nitrogen mixture as inerting a first process for homogenization of the structure either by holding a temperature at about 900 - 0 C, by reducing the temperature by about 200 ° C. or alternatively by raising the temperature by about 250 ° C.
  • the casting or pre-strip 9 passes through a first temperature-setting device 12 and is then replaced by means of a first pre-band
  • this second temperature setting device 15 the casting or pre-strip 9 is brought to rolling temperature, before it is then heated to a rolling temperature.
  • nem 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 about 880-940 0 C, to a temperature of about 50 0 C reduced or alternatively the temperature increased by about 50 0 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 the temperature of the casting or Vorbandes 9 is maintained in the second homogenization zone 17 at a temperature at about 700 - 900 0 C, the temperature is reduced by about 100 0 C or the temperature is increased by about 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 ,

Abstract

The invention relates to a method and to a production line for producing hot-rolled strips of metal, wherein the cast strip, as a leader strip, initially runs through a first process for homogenizing the microstructure under shield gas, and the leader strip is then subjected to at least one further heat treatment before it is subsequentially subjected to a rolling process for reducing the thickness. After the thickness reduction, the leader strip runs through a second process for homogenizing and recrystallizing the microstructure thereof, before the leader strip finally travels through a cutting device and is cut off from the following leader strip as a completely rolled hot-rolled strip.

Description

Verfahren zum Herstellen von Bändern aus Metall und Produktionsanlage zur Durchführung des Verfahrens Method for producing strips of metal and production plant for carrying out the method
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, Mn1 AI 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 proportion of C, Mn 1 Al and Si can be made advantageous.
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.For example, EP 1 047 510 B1 discloses a production method for producing hot rolled thin flat products. 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 Ein- richtung wahlweise gesteuert gekühlt, erwärmt oder auf Temperatur gehalten und die Kanten des Warmbandes werden nachgewärmt.The pre-rolled hot-rolled strip is optionally cooled, heated or kept to temperature in a facility downstream of the roughing train and the edges of the hot-rolled strip are reheated.
Der eingerüstigen Vorstraße folgen eine mehrgerüstige Fertigstraße, ein Aus- laufrollgang mit einer Einrichtung zum Kühlen des Warmbandes sowie vor- und nachgeordnete Wickelmaschinen zum Aufwickeln des Warmbandes. 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 single-storey roughing road is followed by a multistorey finishing train, a discharge 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.
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, Mn1 Si und AI 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.The document WO 2006/066551 A1 furthermore discloses a method for producing hot strips of lightweight steel, which in particular is readily cold-drawable and which has Fe, Mn 1 Si and Al as the main elements. 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 Rekristallisationsver- halten des Materials von Bedeutung ist.The question of whether the rolling process is to be carried out inline or decoupled from the casting process is essentially 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, Kantenein- schnürungen 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, this can lead to casting defects and negative influence on the casting belt, such as thickness variations, overflows, edge lacing 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 Tem- peratureinstellvorrichtung, 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 Ho- mogenisierungszone bevor es als Warmband von dem nachkommenden Vorband getrennt wird. 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 0C, ein Reduzieren der Temperatur um 200 0C und ein Erhöhen der Temperatur um 250 0C.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 setting device in order to optionally maintain the temperature of the pre-strip, to reduce the temperature of the pre-strip or to raise 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 being separated as a hot strip from the incoming pre-strip. In the first homogenization zone, an argon / CO 2 nitrogen mixture is used as the inertizing gas. In the first homogenization zone, the temperature is maintained in the range of 900-1000 ° C., the temperature is reduced by 200 ° C., and the temperature is raised 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 nun- mehr erhaltene Warmband eine mindestens in den Randbereichen erfolgte Rekristallisation, bei einer gehaltenen Temperatur des Warmbandes, bei einer vergleichsweise reduzierten Temperatur oder bei einer vergleichsweise höheren Temperatur.Through this forming process recrystallization of the material is initiated. In the subsequent second homogenization zone, the now obtained hot strip undergoes recrystallization, at least in the peripheral areas, 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 „Temperatur- fenster" 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. may 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 complete solidification and have zero-toughness or zero toughness dependent thereon.
Nachdem das Vorband die zweite Homogenisierungszone durchlaufen hat, wird das Warmband einer Trenneinrichtung mit zur Walz- bzw. Transportbandgeschwindigkeit synchronisierter Arbeitsgeschwindigkeit zugeführt, mit vorbe- stimmter 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 to the rolling or transport belt speed. of a certain length cut off in the opening band and wound up in a winding system into 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 Transportge- schwindigkeit 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 kom- men kann.In a further refinement of the method according to the invention, after the first process for homogenizing the microstructure, the transport speed of the pre-strip is influenced by means of a mass flow control unit. This prevents disturbances from the subsequent process sequences within the manufacturing process from adversely affecting the casting process and the casting belt, and can lead to thickness fluctuations, overflows, edge constrictions, and belt or stall, for example.
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.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.
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.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 - 9000C 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.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 the first roll stand downstream second homogenization the pre-strip is now as a hot strip at a temperature of 700 - subjected to 900 0 C of a recrystallization, in particular in the edge regions of the hot strip, so that the material tension or compression forces as well as plastic deformation, which in Winding or stacking occur without affecting the microstructure can accommodate.
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.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 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 gese- hen, zwischen einem ersten Vorband-Förderelement und einem zweiten Vor- band-Förderelement eingeordnet.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 in the transport direction of the pre-strip gese- hen, between a first Vorband conveying element and a second Vorband-conveying element arranged.
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.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 undergoes 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: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 schematisch die Produktionsanlage zur Durchführung des erfindungsgemäßen Verfahrens zum endabmessungsnahen Bandgießen mit Wickel- bzw. Stapeleinrichtung.1 shows 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 Gießpro- zesses 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 sole FIGURE 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 Einhau- sung der Gießmaschine 1 mit entsprechender Schutzgasatmosphäre.The devices for intensively cooling the underside of the upper run of the conveyor 2 as well as the complete enclosure of the casting machine 1 with a corresponding protective gas atmosphere are not shown in detail.
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 weitest- gehend durcherstarrt ist.After application of the melt 5 to the circulating conveyor belt of the conveyor 2, solidification and formation of a casting or pre-strip 9 occur as a result of the intensive cooling, which solidifies to a large extent at the end of the conveyor 2.
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 Homogenisierungs- zone 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- C02-Stickstoff-Gemisch als Inertisierungsgas einem ersten Prozess zur Homo- genisierung des Gefüges wahlweise durch Halten einer Temperatur bei etwa 900 - 1000 0C, durch Reduzieren der Temperatur um etwa 200 0C oder alternativ durch Erhöhen der Temperatur um etwa 250 0C 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, or alternatively to heat it up somewhat. 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 C0 2 nitrogen mixture as inerting a first process for homogenization of the structure either by holding a temperature at about 900 - 0 C, by reducing the temperature by about 200 ° C. or alternatively by raising the temperature by about 250 ° C.
Nachfolgend durchläuft das Gieß- oder Vorband 9 eine erste Temperaturein- Stellvorrichtung 12 und wird dann mittels eines ersten Vorband-Subsequently, the casting or pre-strip 9 passes through a first temperature-setting device 12 and is then replaced by means of a first pre-band
Förderelementes 14 und eines zweiten Vorband-Förderelementes 14' durch eine zwischen dem ersten Vorband-Förderelement 14 und dem zweiten Vor- band-Förderelement 14' angeordnete, aus Tänzerwalze oder Schiingenheber ausgebildete Massenstromregeleinheit 13 einer zweiten Temperatureinstellvor- richtung 15 zugeführt. In dieser zweiten Temperatureinstellvorrichtung 15 wird das Gieß- oder Vorband 9 auf Walztemperatur gebracht, bevor es dann in ei- nem 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 etwa 880 - 940 0C gehalten, um eine Temperatur von etwa 50 0C reduziert oder alternativ die Temperatur um etwa 50 0C 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, unterzo- gen wird. Dies geschieht dadurch, dass wahlweise die Temperatur des Gießoder Vorbandes 9 in der zweiten Homogenisierungszone 17 auf einer Temperatur bei etwa 700 - 900 0C gehalten wird, die Temperatur um etwa 100 0C reduziert oder die Temperatur um etwa 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. Conveyor element 14 and a second pre-conveyor element 14 'by a arranged between the first pre-conveyor element 14 and the second Vorband-conveying element 14', formed from dancer roller or ski lifter mass flow control unit 13 of a second Temperatureinstellvor- direction 15 fed. In this second temperature setting device 15, the casting or pre-strip 9 is brought to rolling temperature, before it is then heated to a rolling temperature. nem 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 about 880-940 0 C, to a temperature of about 50 0 C reduced or alternatively the temperature increased by about 50 0 C. After passing through the first rolling 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 the temperature of the casting or Vorbandes 9 is maintained in the second homogenization zone 17 at a temperature at about 700 - 900 0 C, the temperature is reduced by about 100 0 C or the temperature is increased by about 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

Patentansprüche claims
1. Verfahren zum kontinuierlichen oder diskontinuierlichen Herstellen warm gewalzter Bänder aus gegossenem Metall, insbesondere Stahl, wonach das gegossene Band als Vorband wenigsten einem Wärmebehandlungs- prozess unterzogen und nachfolgend als Warmband aufgewickelt oder gestapelt wird, dadurch gekennzeichnet, dass das nach dem Gießprozess erhaltene Vorband einer unter Schutzgas stehenden Atmosphäre in Verbindung mit einem ersten Prozess zur Homogenisierung des Gefüges, durch wahlweises Halten einer Temperatur bei etwa 900 - 1000 0C, durch Reduzieren der Temperatur um etwa 200 0C oder durch Erhöhen der Temperatur um etwa 250 0C, ausgesetzt wird, dass das Vorband nach dem ersten Homogenisierungsprozess wenigstens einer weiteren Wärmebehandlung durch wahlweises Halten der Temperatur bei 880 - 940 0C, durch Reduzieren der Temperatur um etwa 50 0C oder durch Erhöhen der Temperatur um etwa 50 0C unterzogen wird, dass das Vorband im weiteren Verlauf einem mindestens einen Stich aufweisenden Warmwalzprozess unterzogen wird, wobei das Vorband einer Dickenreduktion von kleiner 49 % unterzogen wird, dass das Vorband daraufhin einem zweiten Prozess zur Homogenisierung bzw. zur Rekristallisation der Gefügestruktur, durch wahlweises Halten der Temperatur bei etwa 700 - 900 0C, durch Reduzieren der Temperatur um etwa 100 0C oder durch Erhöhen der Temperatur um etwa 50 0C, unterzogen wird und dass das Vorband nachfolgend eine mit der Transport- oder Bandgeschwindigkeit synchronisierten Trenneinrichtung passiert und als gewalztes Warmband vom Vorband abgetrennt wird.1. A process for the continuous or discontinuous production of hot rolled strip of cast metal, in particular steel, according to which the cast strip as a preliminary strip least subjected to a heat treatment process and subsequently wound or stacked as a hot strip, characterized in that the received after the casting process Vorband a under inert gas atmosphere in conjunction with a first process for homogenization of the structure, by selectively holding a temperature at about 900 - 1000 0 C, by reducing the temperature by about 200 0 C or by raising the temperature by about 250 0 C exposed that the pre-strip after the first homogenization process at least one further heat treatment, by selectively maintaining the temperature at 880-940 0 C, is subjected by reducing the temperature to about 50 0 C, or by raising the temperature to about 50 0 C, that the pre-strip in further course of at least one Stic subjected to hot rolling process, wherein the Vorband is subjected to a reduction in thickness of less than 49%, that the Vorband thereupon a second process for homogenization or recrystallization of the microstructure, by optionally maintaining the temperature at about 700 - 900 0 C, by reducing the Temperature is about 100 0 C or by raising the temperature by about 50 0 C, and that the preliminary strip subsequently passes through a separating device synchronized with the transport or belt speed and is separated from the pre-strip as a rolled hot strip.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass der Gieliprozess vom Walzprozess entkoppelt ist.2. The method according to claim 1, characterized in that the Gieliprozess is decoupled from the rolling process.
3. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Transportgeschwindigkeit des Vorbandes mittels einer Massestromregeleinheit beeinflusst wird.3. The method according to any one of the preceding claims, characterized in that the transport speed of the pre-strip is influenced by means of a mass flow control unit.
4. Verfahren nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, dass das Vorband vor dem Warmwalzen einer zweiten Wärmebehandlung durch wahlweises Halten der Temperatur bei etwa 880 - 940 0C1 durch Reduzieren der Temperatur um etwa 50 0C oder durch Erhöhen der Temperatur um etwa 50 0C unterzogen wird.4. Process according to claims 1 to 3, characterized in that the pre-strip prior to hot rolling a second heat treatment by selectively holding the temperature at about 880 - 940 0 C 1 by reducing the temperature by about 50 0 C or by raising the temperature to about 50 0 C is subjected.
5. Verfahren nach den Ansprüchen 1 bis 4, dadurch gekennzeichnet, dass das Vorband nach der zweiten Wärmebehandlung warm gewalzt wird.5. Process according to claims 1 to 4, characterized in that the pre-strip is hot-rolled after the second heat treatment.
6. Verfahren nach den Ansprüchen 1 bis 5, dadurch gekennzeichnet, dass das Vorband nach dem Warmwalzen einem zweiten Homogenisie- rungsprozess, insbesondere zur Rekristallisation des Vorbandes in den Randbereichen, durch wahlweises Halten der Temperatur bei etwa 700 - 900 0C, durch Reduzieren der Temperatur um etwa 100 0C oder durch Erhöhen der Temperatur um etwa 50 0C, ausgesetzt wird. 6. The method according to claims 1 to 5, characterized in that the pre-strip after hot rolling a second homogenization process, in particular for recrystallization of the pre-strip in the edge regions, by optionally holding the temperature at about 700 - 900 0 C, by reducing the Temperature by about 100 0 C or by raising the temperature by about 50 0 C, is exposed.
7. Verfahren nach den Ansprüchen 1 bis 6, dadurch gekennzeichnet, dass das Vorband nach dem zweiten Homogenisierungsprozess als Warmband eine mit der Transportgeschwindigkeit des Vorbandes syn- chronisierte Trenneinrichtung passiert und das Vorband als Warmband nachfolgend gewickelt oder gestapelt wird.7. The method according to claims 1 to 6, characterized in that the pre-band passes as a hot strip after the second homogenization process synchronized with the transport speed of the pre-strip separator and the pre-strip is subsequently wound as a hot strip or stacked.
8. Produktionsanlage zur Durchführung des Verfahrens nach einem oder mehreren der Ansprüche 1 bis 7, mit wenigstens einer Gießmaschine (1) zum Herstellen eines Gieß- oder8. 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 casting or
Vorbandes (9) vorbestimmter Dicke, mit wenigstens einer Fördereinrichtung (2) zum Transport des Gießbandes, mit wenigstens einer Homogenisierungszone (10), in der zur Beeinflussung der Gefügestruktur des Gießoder Vorbandes die Temperatur gehalten, reduziert oder erhöht wird, mit wenigstens einer weiteren Temperaturzone, in der die Temperatur gehalten, reduziert oder erhöht wird, mit wenigstens einem ersten Walzgerüst (16) zum Erreichen einer teilweisen Umformung des Vorbandes (9), mit wenigstens einer Trenneinrichtung (18) und mit wenigstens einer Wickeloder Stapeleinrichtung (19; 20), dadurch gekennzeichnet, dass der Gießmaschine (1) eine unter einer Schutzgas-Atmosphäre stehende erste Homogenisierungszone (10) nachgeordnet ist, in der die Temperatur wahlweise gehalten, reduziert oder erhöht wird, dass der ersten Homogenisierungszone (10) eine Temperatureinstellvor- richtung (15) zum wahlweisen Halten der Temperatur, zum Reduzieren der Temperatur oder zum Erhöhen der Temperatur nachgeordnet ist, dass der Temperatureinstellvorrichtung (15) ein erstes Walzgerüst (16) nachgeordnet ist, in dem mit wenigstens einem Stich das Vorband einer Dickenreduktion von kleiner 49 % unterzogen wird, dass dem Walzgerüst (16) eine zweite Homogenisierungszone (17) nachgeordnet ist, in der die Temperatur wahlweise gehalten, reduziert oder er- höht wird, um eine Rekristallisation des Warmbandes wenigstens in denVorbandes (9) of predetermined thickness, with at least one conveyor (2) for transporting the casting belt, with at least one homogenization zone (10) in which the temperature is maintained, reduced or increased to influence the microstructure of the casting or Vorbandes, with at least one further temperature zone in which the temperature is maintained, reduced or increased, with at least one first rolling stand (16) for achieving a partial deformation of the pre-strip (9), with at least one separating device (18) and with at least one winding or stacking device (19; 20), characterized in that the casting machine (1) is arranged downstream of a first homogenization zone (10) under an inert gas atmosphere, in which the temperature is optionally kept, reduced or increased, that the first homogenization zone (10) a temperature adjusting device (15) to selectively hold the temperature, to reduce the temperature or to increase the temper is arranged downstream of the temperature setting device (15) a first rolling stand (16) in which at least one stitch, the Vorband a reduction in thickness of less than 49% is subjected to that the rolling stand (16) is followed by a second homogenization zone (17) in which the temperature is maintained, reduced or is increased to a recrystallization of the hot strip at least in the
Randbereichen zu erhalten, und dass der zweiten Homogenisierungszone (17) eine Trenneinrichtung (18) nachgeordnet ist, deren Arbeitsgeschwindigkeit mit der Geschwindigkeit der Fördereinrichtung (2) synchronisiert ist, und in der das vorgewalzte Vorband (9) als Warmband vom Vorband abgetrennt wird.To obtain border areas, and that the second homogenization zone (17) is followed by a separating device (18) whose operating speed is synchronized with the speed of the conveyor (2), and in which the pre-rolled Vorband (9) is separated as hot strip from the pre-strip.
9. Produktionsanlage nach Anspruch 8, dadurch gekennzeichnet, dass der Gießprozess von dem Walzprozess entkoppelt ist.9. Production plant according to claim 8, characterized in that the casting process is decoupled from the rolling process.
10. Produktionsanlage nach Anspruch 8 oder 9, dadurch gekennzeichnet, dass der ersten Homogenisierungszone (10) eine aus Tänzerwalze oder Schiingenheber ausgebildete Massenstromregeleinheit (13) nachgeordnet ist.10. Production plant according to claim 8 or 9, characterized in that the first homogenization zone (10) is formed downstream of a dancer roller or ski lifter mass flow control unit (13).
11. Produktionsanlage nach einem der Ansprüche 8 - 10, dadurch gekennzeichnet, dass eine Massenstromregeleinheit (13), in Transportrichtung des Vor- bandes (9) gesehen, zwischen einem ersten Vorband-Förderelement (14) und einem zweiten Vorband-Förderelement (14) eingeordnet ist.11. Production plant according to one of claims 8 - 10, characterized in that a mass flow control unit (13), seen in the transport direction of the pre-band (9), between a first pre-strip conveyor element (14) and a second pre-conveyor element (14) is arranged.
12. Produktionsanlage nach einem der Ansprüche 8 - 11 , dadurch gekennzeichnet, dass in Transportrichtung des Bandes der ersten Homogenisierungszone12. Production plant according to one of claims 8 - 11, characterized in that in the transport direction of the strip of the first homogenization zone
(10) eine erste Temperatureinstellvorrichtung (12) und eine Massenstromregeleinheit (13) nachgeordnet ist, wobei die Massenstromregeleinheit der zweiten Temperaturstellvorrichtung (15) vorgeschaltet ist.(10) a first temperature adjusting device (12) and a mass flow control unit (13) is arranged downstream, wherein the mass flow control unit of the second temperature control device (15) is connected upstream.
13. Produktionsanlage nach Anspruch 12, dadurch gekennzeichnet, dass zwischen der ersten Temperatureinstellvorrichtung (12) und der Mas- senstromregeleinheit (13) und/oder zwischen der Massenstromregelein- heit (13) und der zweiten Temperatureinstellvorrichtung (15) ein Förderelement (14, 14') angeordnet ist.13. Production plant according to claim 12, characterized in that in that a conveying element (14, 14 ') is arranged between the first temperature setting device (12) and the mass flow control unit (13) and / or between the mass flow control unit (13) and the second temperature adjusting device (15).
14. Produktionsanlage nach einem der Ansprüche 8 - 13, dadurch gekennzeichnet, dass der Trenneinrichtung (18) eine Wickelvorrichtung (19) oder eine Stapelvorrichtung (20) nachgeordnet ist. 14. Production plant according to one of claims 8 - 13, characterized in that the separating device (18) is arranged downstream of a winding device (19) or a stacking device (20).
EP09771720.1A 2008-12-09 2009-12-09 Method for producing strips of metal, and production line for performing the method Active EP2376240B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
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

Publications (2)

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EP2376240A1 true EP2376240A1 (en) 2011-10-19
EP2376240B1 EP2376240B1 (en) 2014-02-12

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US (1) US20120024434A1 (en)
EP (1) EP2376240B1 (en)
JP (1) JP5425218B2 (en)
KR (1) KR101332196B1 (en)
CN (1) CN102245319B (en)
AR (1) AR080265A1 (en)
AU (1) AU2009326518A1 (en)
CA (1) CA2745044C (en)
MX (1) MX2011005636A (en)
RU (1) RU2481903C2 (en)
TW (1) TWI421138B (en)
WO (1) WO2010066412A1 (en)
ZA (1) ZA201103297B (en)

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DE102013214940A1 (en) 2013-07-30 2015-02-05 Sms Siemag Ag Cast rolling mill and method for producing slabs
DE102015216512A1 (en) * 2015-08-28 2017-03-02 Sms Group Gmbh Plant according to the CSP concept and method for operating such a plant
MX2019004835A (en) 2016-10-27 2019-06-20 Novelis Inc High strength 7xxx series aluminum alloys and methods of making the same.
AU2017350515B2 (en) 2016-10-27 2020-03-05 Novelis Inc. High strength 6xxx series aluminum alloys and methods of making the same
EP3532217B1 (en) * 2016-10-27 2021-05-05 Novelis, Inc. Aluminium alloy casting and rolling method and associated intermediate product

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KR101332196B1 (en) 2013-11-25
AR080265A1 (en) 2012-03-28
TW201029770A (en) 2010-08-16
AU2009326518A1 (en) 2011-06-30
US20120024434A1 (en) 2012-02-02
CA2745044A1 (en) 2010-06-17
WO2010066412A1 (en) 2010-06-17
TWI421138B (en) 2014-01-01
RU2481903C2 (en) 2013-05-20
JP5425218B2 (en) 2014-02-26
RU2011128420A (en) 2013-01-20
KR20110083734A (en) 2011-07-20
CN102245319B (en) 2014-11-26
ZA201103297B (en) 2011-12-28
CN102245319A (en) 2011-11-16
JP2012510897A (en) 2012-05-17
MX2011005636A (en) 2011-06-24
EP2376240B1 (en) 2014-02-12
CA2745044C (en) 2015-06-30

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