EP0904165A1 - Process for manufacturing hot rolled steel strips - Google Patents

Process for manufacturing hot rolled steel strips

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Publication number
EP0904165A1
EP0904165A1 EP97921621A EP97921621A EP0904165A1 EP 0904165 A1 EP0904165 A1 EP 0904165A1 EP 97921621 A EP97921621 A EP 97921621A EP 97921621 A EP97921621 A EP 97921621A EP 0904165 A1 EP0904165 A1 EP 0904165A1
Authority
EP
European Patent Office
Prior art keywords
strip
deformation stage
coil
deformation
rolled steel
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
EP97921621A
Other languages
German (de)
French (fr)
Other versions
EP0904165B1 (en
Inventor
Joachim SCHÖNBECK
Herbert Qambusch
Hans Hoppmann
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
Mannesmann 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
Application filed by Mannesmann AG filed Critical Mannesmann AG
Publication of EP0904165A1 publication Critical patent/EP0904165A1/en
Application granted granted Critical
Publication of EP0904165B1 publication Critical patent/EP0904165B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21B1/46—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/02—Winding-up or coiling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/004—Heating the product

Definitions

  • the invention relates to a process for the production of hot-rolled steel strip from continuously cast pre-strip in at least two deformation stages, each with one or more roll stands, in which in the first deformation stage the output strip of the pre-strip rolls out of the continuous casting installation and the intermediate strip produced before the second deformation stage at the exit speed from the first deformation stage is wound into a bundle, which is unwound after reaching the bundle weight and with
  • Tapping speed of the second deformation stage is fed to the finish rolling and then wound into the desired finished coil sizes.
  • An essential feature of this process is the two-stage rolling process, the first deformation stage of which follows the casting machine directly at the casting speed and the second deformation stage of which is carried out at a significantly higher rolling speed.
  • These two rolling process stages are coupled by an intermediate winding system in the form of a reel furnace, in which the continuously cast slab is wound into a bundle after it has been rolled out, the weight of which corresponds to the desired finished bundle weight.
  • the subdivision of the strand, which is initially endless, is therefore carried out after the first deformation stage when that coil weight is reached in the coiler that is the same as the weight of the finished bundle after being rolled out in the second deformation stage.
  • pre-strips are produced in a continuous casting process and wound into bundles, the weight of which corresponds to the weight of the finished strip bundle.
  • the opening act is after
  • the coil weight When the coil weight is reached, it is separated in the intermediate winding station and thus decoupled from the casting installation, so that the strip can be unwound into the finishing train at a higher speed. Due to the risk described above when threading the strip head into the reel, the rolling speeds are limited, so that especially when rolling thin hot strips in the
  • the size of the intermediate bundle is only limited by the mechanical design of the winding unit and the rolling time with which the finishing train can be operated without changing the roll. It is entirely conceivable to continuously roll entire casting sequences of a continuous casting installation with appropriate winding devices, but at least significantly larger tonnages than is possible on systems according to the prior art.
  • the method steps according to the invention increase the buffer capacity of the
  • the intermediate band can be wound up into an intermediate bundle both without a mandrel and on a mandrel.
  • the metallurgical properties can be changed within an intermediate bundle length.
  • the advantages of the present method are the possibility of endless rolling without pre-strip welding, endless rolling with homogeneous pre-strip properties with regard to temperature and geometry, the increase in production of the system due to higher possible rolling speeds, which are no longer restricted by the threading process in the reel, and the creation large buffer capacity between the casting line and the finishing train.
  • the method can be used within single or double-strand systems, whereby the winding principle of the preliminary strip can be carried out both in mandrel-type in winding furnaces and without mandrel in so-called coil boxes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Heat Treatment Of Steel (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)

Abstract

The invention is directed to a process for the production of hot-rolled steel strip from continuously cast precursor strip in at least two deformation stages, each deformation stage having one or more roll stands, wherein initial rolling is carried out in the first deformation stage at the output speed at which the precursor strip exits from the continuous casting plant and the intermediate strip thus produced is coiled prior to the second deformation stage at the output speed at which it exits from the first deformation stage, wherein the coil is uncoiled after reaching the coil weight and is supplied to the second deformation stage for finish rolling at the initial roll pass speed and is then coiled in the desired finished coil sizes. In the first deformation stage, at least 40 tons of a casting sequence of the continuous casting plant is rolled out in endless manner to form intermediate strip and is coiled to form an intermediate coil without severing, and after more or less endless finish rolling the intermediate strip of this intermediate coil is severed according to the desired coil weights and coiled as finished strip only following the second deformation stage.

Description

Verfahren zur Herstellung von warmgewalztem StahlbandProcess for the production of hot rolled steel strip
Beschreibungdescription
Die Erfindung betrifft ein Verfahren zur Herstellung von warmgewalztem Stahlband aus stranggegossenem Vorband in mindestens zwei Verformungsstufen mit jeweils einem oder mehreren Walzgerüsten, bei dem in der ersten Verformungsstufe mit der Austrittsgeschwindigkeit des Vorbandes aus der Stranggießanlage angewalzt und das dabei erzeugte Zwischenband vor der zweiten Verformungsstufe mit Austrittsgeschwindigkeit aus der ersten Verformungsstufe zu einem Bund aufgewickelt wird, das nach Erreichen des Bundgewichtes abgewickelt und mitThe invention relates to a process for the production of hot-rolled steel strip from continuously cast pre-strip in at least two deformation stages, each with one or more roll stands, in which in the first deformation stage the output strip of the pre-strip rolls out of the continuous casting installation and the intermediate strip produced before the second deformation stage at the exit speed from the first deformation stage is wound into a bundle, which is unwound after reaching the bundle weight and with
Anstichgeschwindigkeit der zweiten Verformungsstufe zur Fertigwalzung zugeführt und danach in gewünschten Fertigbundgrößen aufgewickelt wird.Tapping speed of the second deformation stage is fed to the finish rolling and then wound into the desired finished coil sizes.
Ein gattungsgemäßes Verfahren ist beispielsweise in der deutschen Patentschrift 38 40 812 C2 beschrieben und in der Literatur als ISP-Verfahren bekannt geworden.A generic method is described for example in German Patent 38 40 812 C2 and has become known in the literature as the ISP method.
Wesentliches Kennzeichen dieses Verfahrens ist der zweistufige Walzprozeß, dessen erste Verformungsstufe direkt im Anschluß an die Gießmaschine bei Gießgeschwindigkeit erfolgt und dessen zweite Verformungsstufe bei einer deutlich höheren Walzgeschwindigkeit durchgeführt wird. Gekoppelt sind diese beiden Walzprozeßstufen durch ein Zwischenwickelsystem in Form eines Haspelofens, in dem die stranggegossene Bramme nach dem Auswalzen zu einem Bund gewickelt wird, dessen Gewicht dem gewünschten Fertigbundgewicht entspricht. Die Unterteilung des zunächst endlos erzeugten Stranges erfolgt deshalb im Anschluß an die erste Verformungsstufe dann, wenn in dem Haspelofen dasjenige Bundgewicht erreicht ist, das dem Gewicht des Fertigbundes nach dem Auswalzen in der zweiten Verformungsstufe gleich ist.An essential feature of this process is the two-stage rolling process, the first deformation stage of which follows the casting machine directly at the casting speed and the second deformation stage of which is carried out at a significantly higher rolling speed. These two rolling process stages are coupled by an intermediate winding system in the form of a reel furnace, in which the continuously cast slab is wound into a bundle after it has been rolled out, the weight of which corresponds to the desired finished bundle weight. The subdivision of the strand, which is initially endless, is therefore carried out after the first deformation stage when that coil weight is reached in the coiler that is the same as the weight of the finished bundle after being rolled out in the second deformation stage.
Beim Walzen von Warmband nach diesem Prozeß stellt das Einfädeln des Bandkopfes in den Haspel eine Begrenzung der Walzgeschwindigkeit dar, weil bei sehr hohen Geschwindigkeiten die Gefahr eines Hochgehens des Bandkopfes auf dem Auslaufrollgang besteht. Ist der Bandkopf im Haspel eingefangen, könnte praktisch die Walzgeschwindigkeit im Rahmen der Möglichkeiten der Anlage sowie der technologischen Erfordernisse beliebig gesteigert werden.When hot strip is rolled according to this process, threading the strip head into the reel is a limitation of the rolling speed, because at very high speeds there is a risk of the strip head going up on the Exit roller table exists. If the strip head is caught in the reel, the rolling speed could practically be increased as desired within the scope of the facility and the technological requirements.
Zur Überwindung der geschilderten Walzgeschwindigkeitsbegrenzung sind Verfahren zum Endloswalzen entwickelt worden, die auf dem Prinzip des Zusammenfügens der Vorbänder vor Eintritt in die Fertigstraße beruhen. Beispielsweise wird vorgeschlagen, mehrere Vorbänder stirnseitig zusammenzuschweißen, um dadurch die Einfädelvorgänge zu reduzieren und quasi endlos walzen zu können. Das Zusammenschweißen der Vorbänder erfordert jedoch aufwendige Anlagen und begrenzt ebenfalls die mögliche Walzgeschwindigkeit.In order to overcome the described rolling speed limitation, processes for continuous rolling have been developed which are based on the principle of joining the pre-strips together before entering the finishing train. For example, it is proposed to weld several pre-strips together on the end face in order to reduce the threading-in processes and to be able to roll them almost endlessly. However, welding the pre-strips together requires complex systems and also limits the possible rolling speed.
Bei dem Verfahren, von dem die Erfindung ausgeht, werden, wie bereits ausgeführt, Vorbänder im Stranggießverfahren erstellt und zu Bunden aufgewickelt, deren Gewicht dem Gewicht des Fertigbandbundes entspricht. Dazu wird das Vorband nachIn the process on which the invention is based, as already stated, pre-strips are produced in a continuous casting process and wound into bundles, the weight of which corresponds to the weight of the finished strip bundle. For this, the opening act is after
Erreichen des Bundgewichtes in der Zwischenwickelstation abgetrennt und somit von der Gießanlage entkoppelt, so daß ein Abwickeln des Bandes in die Fertigstraße mit höherer Geschwindigkeit erfolgen kann. Durch die vorstehend beschriebene Gefahr beim Einfädeln des Bandkopfes in den Haspel werden die Walzgeschwindigkeiten jedoch begrenzt, so daß gerade beim Walzen dünner Warmbänder in derWhen the coil weight is reached, it is separated in the intermediate winding station and thus decoupled from the casting installation, so that the strip can be unwound into the finishing train at a higher speed. Due to the risk described above when threading the strip head into the reel, the rolling speeds are limited, so that especially when rolling thin hot strips in the
Größenordnung unter 1 ,5 mm erhebliche Probleme entstehen. Konventionelle Anlagen sind deshalb kaum in der Lage, dünnes Warmband in großen Mengen herzustellen.In the order of less than 1.5 mm, considerable problems arise. Conventional systems are therefore hardly able to produce thin hot strip in large quantities.
Ausgehend von den dargelegten Problemen und Nachteilen des Standes der Technik ist es die Aufgabe der vorliegenden Erfindung, ein Verfahren zum Herstellen von warmgewalztem Stahlband vorzuschlagen, bei dem mit höheren Endwalzgeschwindigkeiten auch sehr dünne Bänder sicher gewalzt werden können.Based on the problems and disadvantages of the prior art set out, it is the object of the present invention to propose a method for producing hot-rolled steel strip in which even very thin strips can be reliably rolled at higher final rolling speeds.
Zur Lösung der Aufgabe wird erfindungsgemäß vorgeschlagen, daß in der ersten Verformungsstufe mindestens 40 Tonnen einer Gießsequenz der Stranggießanlage endlos zum Zwischenband ausgewalzt und ohne Unterteilung zu einem Zwischenbund aufgewickelt werden und daß das Zwischenband dieses Zwischenbundes nach quasi endloser Fertigwalzung erst hinter der zweiten Verformungsstufe entsprechend den jeweils gewünschten Bundgewichten unterteilt und als Fertigband aufgewickelt wird. Auf einer gattungsgemäßen Gießanlage mit nachgeschalteter Vorverformungsgruppe wird in einem Endloswalzprozeß Vormaterial zur Fertigbearbeitung in der Fertigstraße erzeugt. Entgegen dem üblichen Betriebsmodus, bei dem dieses Vormaterial in den späteren Bundgewichten entsprechende Teile geschnitten wird, wird das Vormaterial mit dem Ziel des Endloswalzens nicht hinter der Verformungsgruppe getrennt, sondern ungetrennt zu einem mehrere Fertigbunde umfassenden Zwischenbund aufgewickelt. Aus diesem Zwischenbund werden dann in einem Endloswalzprozeß in der Fertigstraße mehrere Bundlängen fertigbearbeitet. Die Größe des Zwischenbundes wird nur durch die mechanische Auslegung der Wickeleinheit sowie die Walzzeit, mit der die Fertigstraße ohne Walzenwechsel betrieben werden kann, begrenzt. Es ist durchaus denkbar, bei entsprechenden Wickeleinrichtungen ganze Gießsequenzen einer Stranggießanlage endlos auszuwalzen, mindestens jedoch wesentlich größere Tonnagen, als dies auf Anlagen nach dem Stand der Technik möglich ist.To achieve the object, it is proposed according to the invention that in the first deformation stage, at least 40 tons of a casting sequence of the continuous casting plant are continuously rolled out to the intermediate strip and wound up without division into an intermediate strip, and that the intermediate strip of this intermediate strip, after quasi endless finish rolling, only after the second deformation stage in accordance with the respective desired coil weights divided and wound up as a finished tape. On a generic casting machine with a downstream pre-forming group, raw material for finishing in the finishing train is produced in an endless rolling process. Contrary to the usual operating mode, in which this material is cut in the later coil weights corresponding parts, the material is not wound with the aim of endless rolling behind the deformation group, but wound separately into an intermediate bundle comprising several finished bundles. From this intermediate bundle, several bundle lengths are then finished in an endless rolling process in the finishing train. The size of the intermediate bundle is only limited by the mechanical design of the winding unit and the rolling time with which the finishing train can be operated without changing the roll. It is entirely conceivable to continuously roll entire casting sequences of a continuous casting installation with appropriate winding devices, but at least significantly larger tonnages than is possible on systems according to the prior art.
Die erfindungsgemäßen Verfahrensschritte erhöhen die Pufferkapazität desThe method steps according to the invention increase the buffer capacity of the
Zwischenwickelsystems deutlich. Bei einer Wickelkapazität von etwa 100 Tonnen würde sich beispielsweise die Pufferkapazität auf 60 Minuten pro Zwischenbund erhöhen. Infolge der höheren Endwalzgeschwindigkeiten, die mit einer derartigen Verfahrensweise möglich wird, kann problemlos Warmband mit Dicken < 1 ,2 mm endlos hergestellt werden. Die Ausbringung der Anlage wird verbessert, da sich nur für den Anfang des ersten und das Ende des letzten Bundes hinter der Fertigstraße die typische Walzzunge entwickelt, die vor einer Weiterverarbeitung entfernt werden muß. Darüber hinaus läßt sich die Qualität des Walzgutes verbessern, da der instationäre Zustand des Anstichstoßes nur einmal beim ersten Bund erfolgt.Intermediate winding system clearly. With a winding capacity of around 100 tons, for example, the buffer capacity would increase to 60 minutes per intermediate bundle. As a result of the higher final rolling speeds, which is possible with such a procedure, hot strip with thicknesses <1.2 mm can be produced endlessly. The output of the system is improved, since the typical rolling tongue develops only for the beginning of the first and the end of the last bundle, which must be removed before further processing. In addition, the quality of the rolling stock can be improved, since the transient condition of the tapping joint occurs only once on the first bundle.
Das Aufwickeln des Zwischenbandes zu einem Zwischenbund kann sowohl dornlos wie auch auf einem Dorn erfolgen. Darüber hinaus werden nach einem anderen Merkmal der Erfindung durch Veränderung der Temperaturführung vor dem Aufwickeln des Zwischenbundes und/oder vor der zweiten Verformungsstufe sowie durch flexible Geschwindigkeitsführung die metallurgischen Eigenschaften innerhalb einer Zwischenbundlänge veränderbar.The intermediate band can be wound up into an intermediate bundle both without a mandrel and on a mandrel. In addition, according to another feature of the invention, by changing the temperature control before winding up the intermediate bundle and / or before the second deformation stage and by means of flexible speed control, the metallurgical properties can be changed within an intermediate bundle length.
In einer weiteren Ausgestaltung der Erfindung ist vorgesehen, daß durch geeignete Einstellung der Walzparameter während der Verformung des Zwischenbandes innerhalb der zweiten Verformungsstufe die geometrischen Eigenschaften der aus einem Zwischenbund hergestellten Fertigbunde verändert werden.In a further embodiment of the invention it is provided that by appropriately setting the rolling parameters during the deformation of the intermediate strip the geometric properties of the finished bundles produced from an intermediate bundle are changed within the second deformation stage.
Günstigerweise ist vorzusehen, daß während des Aufwickeins des Vorbandes zu dem Zwischenbund mindestens die Kanten des Zwischenbandes gegen Auskühlung abgeschirmt werden.It is expedient to provide that at least the edges of the intermediate strip are shielded against cooling during the winding of the preliminary strip into the intermediate strip.
Zusammengefaßt bestehen die Vorteile des vorliegenden Verfahrens in der Möglichkeit der endlosen Walzung ohne Vorbandschweißung, der endlosen Walzung mit homogenen Vorbandeigenschaften hinsichtlich Temperatur und Geometrie, der Produktionserhöhung der Anlage durch höhere mögliche Walzgeschwindigkeiten, die nicht mehr durch den Einfädelvorgang im Haspel beschränkt sind und durch die Schaffung großer Pufferkapazität zwischen dem Gießstrang und der Fertigstraße.In summary, the advantages of the present method are the possibility of endless rolling without pre-strip welding, endless rolling with homogeneous pre-strip properties with regard to temperature and geometry, the increase in production of the system due to higher possible rolling speeds, which are no longer restricted by the threading process in the reel, and the creation large buffer capacity between the casting line and the finishing train.
Das Verfahren kann innerhalb von ein- oder zweisträngigen Anlagen angewendet werden, wobei das Wickelprinzip des Vorbandes sowohl dorngebunden in Wickelöfen wie auch dornlos in sogenannten Coilboxen erfolgen kann. The method can be used within single or double-strand systems, whereby the winding principle of the preliminary strip can be carried out both in mandrel-type in winding furnaces and without mandrel in so-called coil boxes.

Claims

Patentansprüche claims
1. Verfahren zur Herstellung von warmgewalztem Stahlband aus stranggegossenem Vorband in mindestens zwei Verformungsstufen mit jeweils einem oder mehreren Walzgerüsten, bei dem in der ersten Verformungsstufe mit der Austrittsgeschwindigkeit des Vorbandes aus der Stranggießanlage angewalzt und das dabei erzeugte Zwischenband vor der zweiten Verformungsstufe mit Austrittsgeschwindigkeit aus der ersten Verformungsstufe zu einem Bund aufgewickelt wird, das nach Erreichen des Bundgewichtes abgewickelt und mit Anstichgeschwindigkeit der zweiten Verformungsstufe zur Fertigwalzung zugeführt und danach in gewünschten Fertigbundgrößen aufgewickelt wird, dadurch gekennzeichnet, daß in der ersten Verformungsstufe mindestens 40 1 einer Gießsequenz der1.Procedure for the production of hot-rolled steel strip from continuously cast pre-strip in at least two deformation stages, each with one or more rolling stands, in which in the first deformation stage the output strip of the pre-strip rolls out of the continuous casting plant and the intermediate strip produced before the second deformation stage at the exit speed from the first deformation stage is wound into a bundle, which is unwound after reaching the bundle weight and fed to the second deformation stage for finishing rolling at piercing speed and then wound into desired finished bundle sizes, characterized in that in the first deformation stage at least 40 l of a casting sequence of
Stranggießanlage endlos zum Zwischenband ausgewalzt und ohne Unterteilung zu einem Zwischenbund aufgewickelt werden und daß das Zwischenband dieses Zwischenbundes nach quasi endloser Fertigwalzung erst hinter der zweiten Verformungsstufe entsprechend den jeweils gewünschten Bundgewichten unterteilt und als Fertigband aufgewickelt wird.Continuous caster are rolled out endlessly to form an intermediate strip and wound up into an intermediate strip without subdivision, and that the intermediate strip of this intermediate strip, after quasi endless finishing rolling, is only divided after the second deformation stage in accordance with the desired coil weights and is wound up as a finished strip.
2. Verfahren zur Herstellung von warmgewalztem Stahlband aus stranggegossenem Vorband nach Anspruch 1 , dadurch gekennzeichnet, daß das Aufwickeln des Zwischenbandes zu einem Zwischenbund auf einem2. A process for the production of hot-rolled steel strip from continuously cast pre-strip according to claim 1, characterized in that the winding of the intermediate strip into an intermediate coil on a
Dorn erfolgt.Thorn occurs.
3. Verfahren zur Herstellung von warmgewalztem Stahlband aus stranggegossenem Vorband nach Anspruch 1 , dadurch gekennzeichnet, daß das Aufwickeln des Zwischenbandes zu einem Zwischenbund dornlos erfolgt. 3. A process for the production of hot-rolled steel strip from continuously cast pre-strip according to claim 1, characterized in that the winding of the intermediate strip takes place without a mandrel.
4. Verfahren zur Herstellung von warmgewalztem Stahlband aus stranggegossenem Vorband nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß durch Veränderung der Temperaturführung vor dem Aufwickeln des Zwischenbundes und/oder vor der zweiten Verformungsstufe sowie durch flexible Geschwindigkeitsführung die metallurgischen Eigenschaften innerhalb einer Zwischenbundlänge verändert werden.4. A process for the production of hot-rolled steel strip from continuously cast pre-strip according to claim 1 to 3, characterized in that the metallurgical properties are changed within an intermediate coil length by changing the temperature control before winding up the intermediate coil and / or before the second deformation stage and by flexible speed control.
5. Verfahren zur Herstellung von warmgewalztem Stahlband aus stranggegossenem Vorband nach Anspruch 1 bis 4, dadurch gekennzeichnet, daß durch geeignete Einstellung der Walzparameter während der Verformung des Zwischenbandes innerhalb der zweiten Verformungsstufe die geometrischen Eigenschaften der aus einem Zwischenbund hergestellten Fertigbunde verändert werden.5. A process for the production of hot-rolled steel strip from continuously cast pre-strip according to claim 1 to 4, characterized in that the geometric properties of the finished strips produced from an intermediate strip are changed by suitably adjusting the rolling parameters during the deformation of the intermediate strip within the second deformation stage.
6. Verfahren zur Herstellung von warmgewalztem Stahlband aus stranggegossenem Vorband nach Anspruch 1 bis 4, dadurch gekennzeichnet, daß während des Aufwickeln des Vorbandes zu dem Zwischenbund mindestens die Kanten des Zwischenbandes gegen Auskühlung abgeschirmt werden. 6. A method for producing hot-rolled steel strip from continuously cast pre-strip according to claim 1 to 4, characterized in that at least the edges of the intermediate strip are shielded from cooling during the winding of the pre-strip to the intermediate band.
EP97921621A 1996-04-23 1997-04-15 Process for manufacturing hot rolled steel strips Expired - Lifetime EP0904165B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19617856 1996-04-23
DE19617856A DE19617856C1 (en) 1996-04-23 1996-04-23 Method of hot rolling steel from concast material
PCT/DE1997/000787 WO1997039842A1 (en) 1996-04-23 1997-04-15 Process for manufacturing hot rolled steel strips

Publications (2)

Publication Number Publication Date
EP0904165A1 true EP0904165A1 (en) 1999-03-31
EP0904165B1 EP0904165B1 (en) 2002-03-06

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EP97921621A Expired - Lifetime EP0904165B1 (en) 1996-04-23 1997-04-15 Process for manufacturing hot rolled steel strips

Country Status (10)

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US (1) US20010007267A1 (en)
EP (1) EP0904165B1 (en)
JP (1) JP4056086B2 (en)
CN (1) CN1081097C (en)
AT (1) ATE213974T1 (en)
DE (2) DE19617856C1 (en)
ID (1) ID19561A (en)
RU (1) RU2170640C2 (en)
WO (1) WO1997039842A1 (en)
ZA (1) ZA972449B (en)

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JP4056086B2 (en) 2008-03-05
DE59706562D1 (en) 2002-04-11
CN1216485A (en) 1999-05-12
JP2000508587A (en) 2000-07-11
WO1997039842A1 (en) 1997-10-30
US20010007267A1 (en) 2001-07-12
ID19561A (en) 1998-07-23
ATE213974T1 (en) 2002-03-15
RU2170640C2 (en) 2001-07-20
ZA972449B (en) 1997-09-29
DE19617856C1 (en) 1997-04-17
EP0904165B1 (en) 2002-03-06

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