EP0893168B1 - Method for producing hot strip of 0.5 mm thickness in a hot strip mill - Google Patents

Method for producing hot strip of 0.5 mm thickness in a hot strip mill Download PDF

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Publication number
EP0893168B1
EP0893168B1 EP98250221A EP98250221A EP0893168B1 EP 0893168 B1 EP0893168 B1 EP 0893168B1 EP 98250221 A EP98250221 A EP 98250221A EP 98250221 A EP98250221 A EP 98250221A EP 0893168 B1 EP0893168 B1 EP 0893168B1
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Prior art keywords
strip
ingoing
outlet
store
wound
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EP98250221A
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German (de)
French (fr)
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EP0893168A2 (en
EP0893168A3 (en
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Werner Dipl.-Ing. Kircher
Peter Dipl.-Ing. Jollet
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SMS Siemag AG
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SMS Siemag AG
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Priority to DE1997132538 priority Critical patent/DE19732538A1/en
Priority to DE19732538 priority
Priority to DE1997149716 priority patent/DE19749716A1/en
Priority to DE19749716 priority
Application filed by SMS Siemag AG filed Critical SMS Siemag AG
Publication of EP0893168A2 publication Critical patent/EP0893168A2/en
Publication of EP0893168A3 publication Critical patent/EP0893168A3/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B1/00Metal-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
    • B21B1/46Metal-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
    • B21B1/466Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a non-continuous process, i.e. the cast being cut before rolling
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B1/00Metal-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
    • B21B1/22Metal-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
    • B21B1/30Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process
    • B21B1/32Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
    • B21B1/34Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work by hot-rolling
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B45/00Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/004Heating the product
    • B21B2045/006Heating the product in vacuum or in inert atmosphere
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/4998Combined manufacture including applying or shaping of fluent material
    • Y10T29/49988Metal casting
    • Y10T29/49991Combined with rolling

Description

Die Erfindung betrifft ein Verfahren zur Herstellung von dünnem warmgewalzten Stahlband mit einer Enddicke < 1 mm aus bandförmig gegossenem Vormaterial in aufeinander folgenden Schritten, bei dem das die Gießanlage verlassende erstarrte Vormaterial in Vorbandlängen aufgeteilt und in einem Durchlaufofen auf Walztemperatur erwärmt wird, um es in einer reversierend betriebenen Tandem-Steckel-Gerüstgruppe sowie anschließender Fertigstraße auszuwalzen.The invention relates to a method for producing thin hot-rolled Steel strip with a final thickness of <1 mm from strip-shaped cast material in successive steps in which the one leaving the casting plant froze Pre-material divided into pre-strip lengths and in a continuous furnace Rolling temperature is heated to it in a reversing tandem-Steckel stand group as well as the subsequent finishing train.
Dokument EP-A-0 734 793 beschreibt ein, solches Verfahren, mit dem Blechdicken von 1 mm und mehr erreichbar sind.Document EP-A-0 734 793 describes such a method with which sheet thicknesses of 1 mm and more can be achieved.
Das Walzen von ferritischen Bändern bis zu Abmessungen von ca. 0,7 mm Dicke ist bisher nur im Contibetrieb möglich, d.h. auf Walzanlagen mit einer Vielzahl von Gerüsten und entsprechend hohen Investitionskosten. Schweißmaschinen zum Aneinanderfügen der Vorbänder zur Erzeugung endlosen Bandes wurden synchron mit der Einzugsgeschwindigkeit des Vorbandes in das Walzwerk mitbewegt, was einen hohen maschinellen Aufwand bedeutet.The rolling of ferritic strips up to dimensions of approx. 0.7 mm thickness is previously only possible in continuous operation, i.e. on rolling mills with a variety of Scaffolding and correspondingly high investment costs. Welding machines for Joining the pre-tapes to create endless tape was synchronized moving with the speed of the pre-strip into the rolling mill, what means a lot of machine work.
Aufgabe der vorliegenden Erfindung ist es, ein Verfahren zur Herstellung von extrem dünnem Fertigband, vorzugsweise ca. 0,5 mm dick, zu schaffen, das mit wenigen Gerüsten, also geringen Investitionskosten, eine hohe Anlagenkapazität aufweist und das ohne Kapazitätseinschränkungen ebenfalls für dickere Bandabmessungen (dicker als 1,2 mm) genutzt werden kann.The object of the present invention is to provide a method for producing extreme thin finished tape, preferably about 0.5 mm thick, to create that with a few Scaffolding, i.e. low investment costs, has a high system capacity and that without capacity restrictions also for thicker belt dimensions (thicker than 1.2 mm) can be used.
Zur Lösung dieser Aufgabe wird bei dem gattungsgemäßen Verfahren vorgeschlagen,
  • a. daß das ≦ 90 mm dick gegossene Vormaterial nach dem Entzundern der Oberfläche auf der Tandem-Steckel-Gerüstgruppe in 6 Stichen gewalzt wird, wobei das Vormaterial nach dem ersten und zweiten Durchlauf in einlauf- und auslaufseitig der Tandem-Steckel-Gerüstgruppe angeordneten Wickelöfen auf- und abgewickelt wird,,
  • b. daß das Vorband nach dem dritten Durchlauf durch die Steckel-Walzgerüste in einer als Zwischenspeicher für das Vorband dienenden auslaufseitigen Wickeleinrichtung mit zwei übereinanderliegenden Öfen aufgehaspelt wird,
  • c. daß gleichzeitig mit dem Aufhaspeln des ersten Bundes ein zweites Bund aus dem Zwischenspeicher abgewickelt wird, dessen geschopftes vorderes Ende an das geschopfte hintere Ende des bereits abgewickelten Vorbandes angeschweißt wird,
  • d. daß das zu einem endlosen Band zusammengeschweißte Vorband durch einen zweiten Vorbandspeicher hindurch der Fertigstraße zugeführt wird, die das Vorband auf die gewünschte Fertigbanddicke reduziert.
  • To solve this problem, the generic method proposes
    • a. that the ≦ 90 mm thick cast material is rolled in 6 passes after descaling the surface on the tandem-Steckel stand group. and is processed ,,
    • b. that after the third pass through the Steckel roll stands, the pre-strip is wound up in an outlet-side winding device, which serves as a buffer for the pre-strip, with two superimposed furnaces,
    • c. that at the same time as the first coil is being wound up, a second coil is unwound from the intermediate store, the cropped front end of which is welded to the cropped rear end of the pre-unwound strip,
    • d. that the pre-strip welded together to form an endless strip is fed through a second pre-strip store to the finishing train, which reduces the pre-strip to the desired finished strip thickness.
    Die Erfindung besteht also darin, daß eine ca. 90 mm dicke oder dünnere Bramme erzeugt wird, die am Ausgang der Gießanlage mittels einer Schere oder anderen Teileinrichtungen in endliche Längen zerteilt wird. Die so entstandene Bramme durchläuft z.B. einen Rollenherdofen und wird gleichmäßig temperiert einer Vorstraße zugeführt. Die Vorstraße besteht aus einer Entzunderungseinrichtung, einer Tandem-Steckel-Gerüstgruppe mit beidseitigen angeordneten Wickelöfen bzw. einer sich unmittelbar an den auslaufseitigen Steckelofen anschließenden Wickeleinrichtung mit zwei übereinanderliegenden Öfen, wie sie als Cremonabox bekannt ist. Die Cremonabox hat eine obere und eine untere Wickelmöglichkeit, die wechselweise einsetzbar sind.The invention therefore consists in the fact that an approximately 90 mm thick or thinner slab is generated at the exit of the casting machine using scissors or other Sub-devices is divided into finite lengths. The resulting slab goes through e.g. a roller hearth furnace and is tempered evenly on a rough road fed. The roughing mill consists of a descaling device, a tandem Steckel scaffolding group with winding furnaces arranged on both sides or one itself directly to the winding device connected to the outlet-side Steckel furnace two superimposed ovens, as it is known as a Cremonabox. The Cremonabox has an upper and a lower changing option, which alternately can be used.
    Die aus dem Rollenherdofen auslaufende Bramme wird zuerst entzundert und dann in den beiden Steckelgerüsten der Tandem-Steckel-Gerüstgruppe in zwei Stichen so weit in der Dicke reduziert, daß sie im auslaufseitig angeordneten Wickelofen aufgewickelt werden kann. Der nächste Stich erfolgt im Reversierbetrieb erneut mit der Tandem-Steckel-Gerüstgruppe, wobei das Vorband in den einlaufseitig angeordneten Wickelofen geführt wird. Vor dem zweiten Einlauf des Vorbandes in die Gerüstgruppe kann die Oberfläche ein weiteres mal entzundert werden. Eine Entzunderung kann auch vor dem letzten (dritten) Reversierstich erfolgen, um ein Einwalzen von Zunder in das Material zu verhindern. Der dritte Reversierstich wird wieder in Richtung Fertigstraße in den zwei Steckel-Gerüsten durchgeführt, so daß das Vorband insgesamt sechs Reduzierstiche erfahren hat. Im Anschluß daran wird das auslaufende Vorband in der oben erwähnten "Cremonabox" aufgewickelt.The slab emerging from the roller hearth furnace is first descaled and then in the two Steckel stands of the tandem Steckel stand group in two passes greatly reduced in thickness that they are arranged in the winding furnace on the outlet side can be wound up. The next stitch is carried out again in reverse operation the tandem Steckel scaffolding group, with the supporting strip in the inlet side arranged winding furnace is guided. Before the second entry of the opening act into the The surface can be descaled once more. A Descaling can also be done before the last (third) reversing stitch To prevent scale from rolling into the material. The third reverse stitch is again in the direction of the finishing train in the two Steckel stands, so that the support band has experienced a total of six reduction stitches. Following that the outgoing opening tape is wound up in the "Cremonabox" mentioned above.
    Es hat sich als günstig herausgestellt, als auslaufseitig angeordneten Wickelofen gemäß Merkmal a. die als Zwischenspeicher für das Vorband dienende auslaufseitigen Wickeleinrichtung gemäß Merkmal b. zu verwenden. Dadurch entfällt ein zusätzlicher Wickelofen zwischen den Steckel-Gerüsten und der "Cremonabox", denn diese kann problemlos sowohl als Wickelofen wie auch als Zwischenspeicher eingesetzt werden.It has proven to be favorable as a winding furnace arranged on the outlet side according to feature a. which serves as a buffer for the opening act outlet-side winding device according to feature b. to use. This eliminates an additional winding furnace between the Steckel scaffolding and the "Cremonabox", because this can easily be used both as a winding furnace and as an intermediate store be used.
    Nachdem das Vorband z. B. in der oberen Wickeleinrichtung der "Cremonabox" aufgewickelt worden ist, wird der Ofenkörper geschwenkt und das Vorbandende, das jetzt zum Vorbandkopf wird, wird einer Schere zugeführt, um den Kopfschrott abzutrennen. Das Vorband wird dann weiter durch eine Schweißmaschine ( die erst beim zweiten Vorband notwendig wird) und einen Vorbandspeicher geführt, an dessen Ende eine weitere Entzunderungseinrichtung steht, um nochmals zwischenzeitlich entstandenen Zunder zu entfernen.After the opening act z. B. in the upper winding device of the "Cremonabox" has been wound up, the furnace body is pivoted and the pre-strip end that now becomes the opening head, scissors are fed to the scrap head separate. The supporting strip is then further processed by a welding machine (the first is necessary for the second opening act) and a opening act store the end of which is another descaling device to again remove any scale that has arisen in the meantime.
    Unmittelbar hinter der Entzunderungseinrichtung befindet sich eine Fertigstaffel, die das Band auf eine Dicke reduziert, die einen sicheren Transport des Bandes über den Auslaufrollgang bis zum Haspel gewährleistet. Vor dem Haspel ist eine Schnellschnittschere angeordnet, die die Bänder später beim Endloswalzen wieder zerteilt, um so die gewünschten Bundgrößen und Bundgewichte zu erzielen.Immediately behind the descaling device there is a finishing line, the the band is reduced to a thickness that ensures safe transport of the band over the Outfeed roller conveyor guaranteed up to the reel. There is one in front of the reel High-speed shear arranged the tapes again later in the continuous rolling divided to achieve the desired waist sizes and weights.
    Erfindungsgemäß ist vorgesehen, daß das Zusammenschweißen der geschopften Vorbänder im Stillstand der Vorbänder erfolgt. Dazu wird, nachdem das Band vom Haspel gefaßt ist, im Vorbandspeicher vor der Fertigstraße die notwendige Vorbandlänge gespeichert, die für ein im Stillstand durchgeführtes Anschweißen des zweiten Vorbandes an das erste Vorband notwendig ist. Während also das erste Band in der Fertigstraße gewalzt wird, wird simultan in der Vorstraße das zweite Vorband gewalzt und im unteren Ofen der Cremonabox aufgewickelt. According to the invention it is provided that the welding together of the cropped Pre-tapes are carried out with the pre-tapes stationary. After the tape from Haspel is taken, the necessary in the pre-roll storage in front of the finishing train The pre-strip length is saved, which is necessary for welding the second opening act to the first opening act is necessary. So during the first If the strip is rolled in the finishing train, it becomes the second in the roughing train simultaneously The supporting strip is rolled and wound up in the lower oven of the Cremonabox.
    Das Vorband wird nach dem Kopfschrottschnitt mittels der Schweißmaschine an das Vorbandende des ersten Bandes angeschweißt. Zur gleichen Zeit leert sich der Vorbandspeicher vor der Fertigstraße, ohne das der Walzvorgang in der Fertigstraße unterbrochen werden muß. Der jetzt leere obere Ofen der Cremonabox schwenkt wieder zurück in Aufnahmeposition, um somit für das dritte Vorband aufnahmebereit zu sein, das wiederum simultan zum Walzprozess des zweiten Bandes in der Fertigstraße erzeugt wird.After the scrap head cut, the supporting strip is attached to the The end of the first band welded on. At the same time, the Pre-strip storage in front of the finishing train without the rolling process in the finishing train must be interrupted. The now empty upper oven of the Cremonabox swings back to the recording position, ready for the third opening act to be, which in turn simultaneously with the rolling process of the second strip in the Finishing line is generated.
    Sobald das Fertigband zwischen letztem aktivem Fertiggerüst und Haspel eingespannt ist, kann mittels der Anstellungen der Fertigstraße die Fertigbanddicke reduziert und die Walzgeschwindigkeit entsprechend angehoben werden. Auf diese Weise ist das Ziel zu erreichen, 0,5 mm dickes Warmband im austenitischen Temperaturniveau zu walzen.As soon as the finished belt between the last active finishing stand and reel is clamped, the finished strip thickness can be adjusted by means of the settings of the finishing train reduced and the rolling speed increased accordingly. To this The goal is to achieve 0.5 mm thick hot strip in austenitic Roll temperature level.
    Die Schnellschnittschere vor dem Haspel ermöglicht es, das endlose Band wieder zu teilen und eine gewünschte Bundgröße zu erzeugen. Während des Durchlaufs des zweiten Vorbandes durch die Fertigstraße wird wieder der Speicher vor der Fertigstraße gefüllt, um so die notwendige Zeit für den Anschweißvorgang des nächsten Vorbandes an das gerade gewalzte Vorband sicher zu stellen. Dieser Vorgang läuft immer wieder im gleichen Rhythmus ab.The quick-cut shears in front of the reel enable the endless belt to be closed again divide and create a desired waist size. During the run of the second pre-production line through the finishing train, the store in front of the Finishing line filled, so the time required for the welding process of the the next opening to the just rolled opening. This process always runs in the same rhythm.
    Vorzugsweise steht der zweite beheizte Vorbandspeicher unter Schutzgas und ist direkt vor der Fertigstraße angeordnet. Die Kapazität des Vorbandspeichers ist entsprechend der Auslaufgeschwindigkeit des Fertigbandes und der benötigten Zeit zum Verschweißen der Vorbandenden ausgelegt.The second heated pre-strip store is preferably under protective gas and is arranged directly in front of the finishing train. The capacity of the opening memory is according to the run-out speed of the finished strip and the time required designed to weld the leading ends.
    Wird der Prozeß aus verschiedenen Gründen beendet, sollte die Fertigbanddicke wieder in eine Größe gebracht werden, die ein problemloses Ausfädeln aus der Fertigstraße und einen sicheren Transport über den Auslaufrollgang möglich macht.If the process is ended for various reasons, the finished strip should be thick be brought back to a size that allows easy unthreading Finishing line and safe transport via the exit roller table.
    Mit der Erfindung wird erstmalig eine Anlage zur Herstellung von extrem dünnem Fertigband geschaffen, die mit wenigen Gerüsten, also geringen Investitionskosten, eine hohe Anlagenkapazität aufweist. With the invention for the first time a system for the production of extremely thin Finished strip created with few scaffolding, so low investment costs, has a high system capacity.
    Darüber hinaus kann sie ebenfalls ohne Kapazitätseinschränkungen für dickere Bandabmessungen (dicker als 1,2 mm) genutzt werden, wenn man die Schweißmaschine und den Zwischenspeicher vor der Fertigstraße nicht nutzt. Deshalb wird nach einem anderen Merkmal der Erfindung vorgeschlagen, daß das Vorband in der Tandem Steckel-Gerüstgruppe in 6 Stichen bis auf eine Dicke von beispielsweise 3 mm gewalzt wird.In addition, it can also be used without capacity restrictions for thicker ones Belt dimensions (thicker than 1.2 mm) can be used when the Welding machine and the temporary storage in front of the finishing train. Therefore, it is proposed according to another feature of the invention that Supporting tape in the tandem Steckel scaffolding group in 6 passes to a thickness of for example 3 mm is rolled.
    Die Gießmaschinenkapazität und die Walzkapazität der Vor- und Fertigstraße werden so ausgelegt ist, daß ein kontinuierlicher Betrieb gewährleistet ist und die gewünschten thermischen und geometrischen Anforderungen an das Fertigband erfüllt werden.The casting machine capacity and the rolling capacity of the roughing and finishing train will be is designed to ensure continuous operation and the desired thermal and geometric requirements for the finished strip be fulfilled.
    Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird nachfolgend beschrieben.An embodiment of the invention is shown in the drawing and will described below.
    In der einzigen Zeichnungsfigur 1 ist mit 1 und 1' ein Pfannendrehturm bezeichnet, der der Stranggießanlage 2 und 2' vorgeordnet ist und diese mit Gießschmelze versorgt. Die als Bogenstranggießanlage mit horizontalem Auslauf ausgebildete Stranggießanlage weist an ihrem auslaufseitigen Ende eine Brennschneidmaschine oder eine Schere 3 und 3' auf, mit deren Hilfe der kontinuierlich gegossene Vormaterialstrang in Brammen unterteilt wird. Diese Brammen laufen in einen Rollenherdofen 4 und 4' ein, wo sie über ihren Querschnitt auf gleichmäßige Temperatur gebracht werden. Mit der Fähre 5 werden die Brammen aus dem Anlagenabschnitt 1' bis 4' in die Walzwerkslinie transportiert. Auf diese Weise werden die 2 Gießmaschinen mit dem Walzwerk verbunden. Nach dem Durchlauf durch den Rollenherdofen wird die Bramme in einem Zunderwäscher 6 entzundert und dann der Tandem-Steckel-Gerüstgruppe 7 zugeführt. Nach dem ersten Durchlauf durch diese Gerüstgruppe wird das Material in dem auslaufseitigen Wickelofen 8 aufgewickelt, der -wie beansprucht- auch gleichzeitig der als Zwischenspeicher für das Vorband dienende "Cremonaofen" sein kann, um anschließend wieder im Reversierbetrieb in der Gerüstgruppe 7 weiter reduziert zu werden. Nach diesem Durchlauf wird das Material im einlaufseitigen Wickelofen 9 aufgewickelt. Der dritte Durchlauf durch die Gerüstgruppe 7 reduziert das Material zu der gewünschten Vorbanddicke. Dieses Vorband wird in der Wickeleinrichtung 10 aufgenommen und zwischengespeichert. die aus 2 übereinander liegenden Öfen besteht, welche mit je einem Wickeldorn zur Aufnahme des Vorbandes bestückt sind. Die Gehäuse dieser Öfen sind so ausgebildet, daß sie schwenkbar sind, um das Vorbandende in die richtige Position für die nachfolgenden Arbeitsschritte zu bringen. Die Öfen dienen als Zwischenspeicher, um kurze Ablaufunregelmäßigkeiten in den nachfolgenden Anlagenabschnitten zu kompensieren und werden ggf. auch als "Steckelöfen" bei den ersten Reversierstichen verwendet. In letzteren Fall entfällt der auslaufseitige Wickelofen 8.In the single drawing figure 1, 1 and 1 'denotes a ladle turret, which is upstream of the continuous casting plant 2 and 2 'and this with casting melt provided. Designed as a continuous caster with a horizontal outlet The continuous caster has a flame cutting machine at its outlet end or a pair of scissors 3 and 3 ', with the help of which the continuously cast Material strand is divided into slabs. These slabs run into one Roller hearth furnace 4 and 4 ', where they are uniform over their cross-section Temperature. With the ferry 5 the slabs from the Plant section 1 'to 4' transported into the rolling mill line. That way the 2 casting machines connected to the rolling mill. After passing through the Roller hearth furnace, the slab is descaled in a scale washer 6 and then the Tandem-Steckel scaffolding group 7 supplied. After the first pass through this Framework group, the material is wound in the winding furnace 8 on the outlet side - as claimed - also as a buffer for the opening act serving "Cremonaofen" can then be in reverse operation in the scaffolding group 7 to be further reduced. After this run that will be Material wound in the inlet-side winding furnace 9. The third pass through the Scaffolding group 7 reduces the material to the desired pre-strip thickness. This Supporting tape is recorded in the winding device 10 and temporarily stored. which consists of 2 superimposed ovens, each with a winding mandrel Recording of the opening act. The housings of these ovens are like this trained that they are pivotable to the end of the strap in the correct position for the subsequent work steps. The ovens serve as Buffer to make short process irregularities in the subsequent To compensate for sections of the system and may also be used as "plug-in ovens" at the first reversing stitches used. In the latter case, there is no outlet side Coiling furnace 8.
    Aus der Wickeleinrichtung wird das Vorband abwechselnd einer Schere 11 zugeführt, die den Kopf des Vorbandes schopft. Das geschopfte Vorband durchläuft eine Schweißmaschine 12, wo es an das ebenfalls geschopfte Ende des vorherigen Vorbandes angeschweißt wird, einen Schlingenturm 13 und einen Zunderwäscher 14, um dann in einer mehrgerüstigen Fertigstraße 15 zum gewünschten Fertigband gewalzt zu werden.The sliver is alternately fed to a pair of scissors 11 from the winding device, which scoops the head of the opening act. The scooped supporting tape goes through one Welding machine 12, where it is also the scooped end of the previous one Pre-strip is welded, a loop tower 13 and a scale washer 14, then in a multi-stand finishing train 15 to the desired finished strip to be rolled.
    Über den Auslaufrollgang 16 mit integrierter Bandkühlung 17 läuft das Band durch eine Schnellschnittschere 18 zu einer Haspeleinrichtung 19, wo es aufgewickelt wird. Bundaustragewagen 20 und weitere Einrichtungen, wie Bindemaschine 21, Waage 22, und Markiereinrichtung 23 folgen. Das fertige Bund wird mittels Bundtransporteinrichtung 24 ins Bundlager 25 transportiert und gelagert.The belt runs through the outlet roller table 16 with integrated belt cooling 17 a quick cut shear 18 to a reel device 19 where it is wound up. Bundaustragewagen 20 and other facilities such as binding machine 21, scales 22, and marking device 23 follow. The finished bundle is by means of Bundle transport device 24 transported and stored in the bundle bearing 25.

    Claims (6)

    1. Method for producing thin hot-rolled steel strip with a final thickness < 1 mm from ingoing material which is cast in strip form in consecutive steps, in which the solidified ingoing material leaving the casting installation is divided up into lengths of ingoing strip and is heated to rolling temperature in a roller hearth furnace (4, 4') in order to roll it out in a tandem Steckel stand group (7), which is operated in a reversing manner, and in a subsequent finishing train (15),
      characterised in that,
      a. the ≦ 90 mm thick cast, ingoing material is rolled in 6 passes on the tandem Steckel stand group (7) after the de-scaling (6) of the surface, the ingoing material being wound up and wound off after the first and second run in coiling ovens (8, 9) which are disposed on the inlet- and outlet-side of the tandem Steckel stand group (7),
      b. in that the ingoing strip is wound up after the third run through the tandem Steckel stand group (7) in an outlet-side winding device (10) which serves as intermediate store for the ingoing strip, said device having two superimposed ovens,
      c. in that simultaneously with the winding-up of the first coil, a second coil is wound off from the intermediate store of the outlet-side winding device (10), the cut-off front end of which coil is welded on to the cut-off rear end of the already wound-off ingoing strip,
      d. in that the ingoing strip which is welded together into a continuous strip is supplied through a second ingoing strip store (13) to the finishing train which reduces the ingoing strip to the desired finished strip thickness.
    2. Method for producing thin hot-rolled steel strip according to claim 1,
      characterised in that the outlet-side winding device (10) according to feature b., which serves as intermediate store for the ingoing strip, is used as coiling oven (8) according to feature a. which is disposed on the outlet-side.
    3. Method for producing thin hot-rolled steel strip according to claim 1 and 2,
      characterised in that the welding together (12) of the cut-off ingoing strips is effected at standstill.
    4. Method for producing thin hot-rolled steel strip according to claim 1 to 3,
      characterised in that the second heated ingoing strip store (13) is under protective gas and is disposed directly before the finishing train (15), and in that the capacity of the ingoing strip store (12) is designed corresponding to the outlet speed of the finished strip and to the required time for the welding of the ingoing strip ends.
    5. Method for producing hot-rolled steel strip according to claim 1 to 4, characterised in that the ingoing strip is rolled in the tandem Steckel stand group (7) in 6 passes up to a thickness of 3 mm.
    6. Method for producing thin hot-rolled steel strip according to claim 1 to 5,
      characterised in that the casting machine capacity and the rolling capacity of the blooming and finishing train is designed such that a continuous operation is ensured and the desired thermal and geometric requirements of the finished strip are met.
    EP98250221A 1997-07-23 1998-06-18 Method for producing hot strip of 0.5 mm thickness in a hot strip mill Expired - Lifetime EP0893168B1 (en)

    Priority Applications (4)

    Application Number Priority Date Filing Date Title
    DE1997132538 DE19732538A1 (en) 1997-07-23 1997-07-23 Method for producing hot rolled thin strip
    DE19732538 1997-07-23
    DE1997149716 DE19749716A1 (en) 1997-10-31 1997-10-31 Method for producing hot rolled thin strip
    DE19749716 1997-10-31

    Publications (3)

    Publication Number Publication Date
    EP0893168A2 EP0893168A2 (en) 1999-01-27
    EP0893168A3 EP0893168A3 (en) 1999-03-31
    EP0893168B1 true EP0893168B1 (en) 2002-05-22

    Family

    ID=26038644

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP98250221A Expired - Lifetime EP0893168B1 (en) 1997-07-23 1998-06-18 Method for producing hot strip of 0.5 mm thickness in a hot strip mill

    Country Status (4)

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    US (1) US6023835A (en)
    EP (1) EP0893168B1 (en)
    JP (1) JPH1177111A (en)
    DE (1) DE59804172D1 (en)

    Families Citing this family (5)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    TWI288676B (en) * 2002-07-06 2007-10-21 Sms Demag Ag Method and casting roller plant for the semi-endless or endless rolling by casting of a metal in particular a steel strip which may be transversely cut as required after solidification
    CN101293258B (en) * 2007-04-25 2010-12-01 宝山钢铁股份有限公司 Process for manufacturing hot rolled steel strips by continuous casting and rolling middle bar strip
    CN101391264B (en) * 2007-09-19 2011-02-02 中冶赛迪工程技术股份有限公司 Technique method of thin middle plate continuous casting and rolling production
    DE102010010156A1 (en) * 2010-03-04 2011-09-08 Kirchhoff Automotive Deutschland Gmbh Process for producing a molded part with at least two structural areas of different ductility
    CN104550237B (en) * 2014-11-28 2016-09-21 中冶南方工程技术有限公司 For producing the continuous casting-Direct Rolling device and method of Bar Wire Product and section bar

    Family Cites Families (10)

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    Publication number Priority date Publication date Assignee Title
    FR2225223B1 (en) * 1973-04-10 1975-08-22 Nippon Kokan Kk
    US5121873A (en) * 1990-06-06 1992-06-16 Hitachi Ltd. Method of and apparatus for joining hot materials to be rolled to each other as well as continuous hot rolling method and system
    IT1244295B (en) * 1990-07-09 1994-07-08 Giovanni Arvedi Process and plant for obtaining wound steel strips, having the characteristics of cold rolled products obtained directly in the hot rolling line
    US5540074A (en) * 1994-12-07 1996-07-30 Ipsco Enterprises Inc. Unitary assembly of peripheral devices for use with steckel mill
    DE19512953A1 (en) * 1995-03-28 1996-10-02 Mannesmann Ag Method and device for producing hot-rolled steel strip
    AT403169B (en) * 1995-04-13 1997-11-25 Voest Alpine Ind Anlagen Reel oven for a hot band
    DE19514475A1 (en) * 1995-04-19 1996-10-24 Schloemann Siemag Ag Steckel rolling mill
    NL1000693C2 (en) * 1995-06-29 1996-12-31 Hoogovens Staal Bv Device for manufacturing a steel strap.
    DE19538341A1 (en) * 1995-09-06 1997-03-13 Schloemann Siemag Ag Hot strip production line for rolling thin rolled strip
    ES2142528T3 (en) * 1995-09-06 2000-04-16 Schloemann Siemag Ag Hot band production installation for thin band laminate.

    Also Published As

    Publication number Publication date
    JPH1177111A (en) 1999-03-23
    EP0893168A3 (en) 1999-03-31
    US6023835A (en) 2000-02-15
    EP0893168A2 (en) 1999-01-27
    DE59804172D1 (en) 2002-06-27

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