WO1989011363A1 - Process for continuous production of steel strip or steel sheet from flat products made by the circular-arc type continuous casting process - Google Patents

Process for continuous production of steel strip or steel sheet from flat products made by the circular-arc type continuous casting process Download PDF

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Publication number
WO1989011363A1
WO1989011363A1 PCT/DE1989/000332 DE8900332W WO8911363A1 WO 1989011363 A1 WO1989011363 A1 WO 1989011363A1 DE 8900332 W DE8900332 W DE 8900332W WO 8911363 A1 WO8911363 A1 WO 8911363A1
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WO
WIPO (PCT)
Prior art keywords
deformation
flat product
strand
strip
heating
Prior art date
Application number
PCT/DE1989/000332
Other languages
German (de)
French (fr)
Inventor
Giovanni Arvedi
Giovanni Gosio
Ulrich Siegers
Klaus BRÜCKNER
Peter Meyer
Ernst Windhaus
Fritz-Peter Pleschiutschnigg
Werner Rahmfeld
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
Family has litigation
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Priority to DE8989906038T priority Critical patent/DE58903052D1/en
Priority to KR1019900700155A priority patent/KR950014488B1/en
Priority to AT89906038T priority patent/ATE83409T1/en
Priority to BR898907450A priority patent/BR8907450A/en
Priority to RO146356A priority patent/RO108933B1/en
Application filed by Mannesmann Ag filed Critical Mannesmann Ag
Priority to EP89906038A priority patent/EP0415987B2/en
Publication of WO1989011363A1 publication Critical patent/WO1989011363A1/en
Priority to FI904757A priority patent/FI92161C/en
Priority to DK279290A priority patent/DK171539B1/en
Priority to NO905088A priority patent/NO176085C/en
Priority to BG93307A priority patent/BG51443A3/en
Priority to SU904831837A priority patent/RU2036030C1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • 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
    • 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
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
    • 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
    • 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 continuous production of steel strip or sheet steel from flat products produced by the sheet continuous casting process with a horizontal outlet direction.
  • the last stand of the rolling mill results in rolling speeds which are too low in order to be able to maintain the required final rolling temperatures of at least approximately 865 degrees C. That , the strip experiences too much cooling between one rolling stage and the subsequent one, owing to the low speed identical to the casting speed when it enters the rolling train.
  • One has moved away from this solution because the problem could not be solved economically even with heat protection devices and heated rollers; because this would result in a significant increase in investment and operating costs.
  • Another proposed solution provides for the strip to be cut off in front of a heating furnace, in which the strip is then heat-treated (temperature compensation) over its entire cross-section.
  • This can be, for example, a gas-heated roller furnace, with which a strip temperature of approx. 1100 degrees C can be set independently of the casting speed to be taken into account at the furnace outlet, that is to say an optimum temperature for the subsequent rolling process.
  • the strip is cut to a standard length, which can be, for example, 50 m for a specific coil weight, for which a corresponding furnace length of approximately 150 m is required if the required buffer effect is taken into account.
  • the thin slab or the "preliminary strip” can be rolled out at higher speeds, and there is therefore no fear of the temperature dropping below the minimum temperature permitted for the final rolling stage.
  • the excess length of the furnace which is approximately 3 times the length of the strip section, also results in an enormous space requirement, on which many steelworks are not equipped.
  • the dimensions of the system and thus of the furnace set limits for the length of the successive strip sections to be treated and thus also for the final coil weight, which in turn limits the scope for use with regard to the production of coils with the largest diameter. Accordingly, a plant of this type does not offer the possibility of using even thinner starting slabs, should this become possible due to the technological development of the continuous casting process. Assuming an initial thickness of 25 mm - as has already been hypothetically done - instead of 50 mm, the band would have to be divided into lengths of approximately 100 m in order to achieve the same final bundle weight, for which a length in for the treatment furnace would have to be provided on the order of 300 m, which is convenient and economic ⁇ Lich not feasible.
  • the aim of the present invention is to create a method of the type described at the outset and a corresponding system for carrying out this method, with which steel strip can be produced continuously from flat product coming from a continuous sheet caster without taking on the aforementioned disadvantages.
  • the tapping of the casting strand in the first roll stand being carried out at the speed at which the rolling stock leaves the arc section of the continuous casting installation.
  • the process is thus said to be carried out "in line” with practically unlimited flexibility, so that it is possible to produce coils of any weight and length or sheets without changing the dimensional parameters of the system, since the rolled strip is separated at least after the first Rolling process or after all operations are carried out immediately before the reel-up or stacking device.
  • the rolled-out strip can be reeled in according to the desired coil weight following the shaping of the flat product or, after the rolled-out strip has been separated off after the shaping of the flat product, can be stacked in predetermined lengths into sheet steel packages, if necessary after cooling and straightening.
  • the flat product is thus first pierced in a first roll stand at the output speed of the product from the continuous sheet casting installation and passes through the successive rolling stages at speeds corresponding to the deformations in the individual passes.
  • the thus-rolled strip is then either coiled and, after the coil weight is reached desired, separated or the tape is divided into ge desired lengths and stacked in sheets.
  • An essential aspect of the present invention is the inductive re-heating of the flat product after descaling to temperatures of approximately 1100 degrees with the best possible temperature compensation, because in this way an undercooling of the strip can be counteracted in a favorable manner.
  • the starting strand After passing through the rolling stands, the starting strand can be cut off with the device which is present anyway for dividing the rolled strips, or it can be cut off by a further separating device downstream of the first deformation stage.
  • the separating device can be arranged behind the first deforming device and between the first deforming device and the further deforming device there can be a device for winding and unwinding the flat product, which is arranged upstream of the separating device.
  • the device for winding and unwinding the flat product is preferably arranged behind the device for inductive heating and in front of the further deformation device.
  • either a separating device for the rolled strip and at least one reel for winding the strip is arranged downstream of this system, or a separating device for the rolled strip, a cooling device, a straightening machine and a stacking device for the separated metal sheets.
  • the system additionally comprises at least one device for inductive heating for intermediate heating between the further rolling stands.
  • the system is also equipped with devices for adjusting the cross-section of the passage between the rollers of the first shaping device and the further rolling stands in order to enable the start-up strand located at the head of the casting strand to pass and immediately after it has passed Cross sections can be traced back to the usual throughput values.
  • the separating device for separating the starting strand is used, which is located behind the first deformation stage.
  • Fig. 3 shows a modified embodiment of the invention.
  • the system according to the invention is roughly shown schematically, by means of which the corresponding method is described.
  • a continuous casting mold which is identified in the drawing by 1
  • the flat product 2 is produced.
  • the flat product 2 guided and transported in conventional support rollers passes from the initial vertical direction over the arc section formed by the support rollers the horizontal position over.
  • the flat product according to the invention passes through a first deformation stage 3, in which it is brought to a maximum thickness of 25 mm, for example.
  • the deformation stage 3 can consist of one or more rolling devices, preferably in a four-way arrangement.
  • a furnace 5 which is preferably equipped with an inductive heating device.
  • this furnace 5 there is a temperature equalization over the entire cross section of the flat product 2, so that it reaches the first stand 6 of the further shaping device with a sufficient rolling temperature. If a piercing speed which is too slow, corresponding to the speed at exit from the sheet path, leads to a considerable drop in temperature, so that an insufficient deformation temperature results in the second roll stand 7 of the further deformation device, then further intermediate heating can possibly take place in the form of a second induction furnace 8 between the roll stands 6 and 7, which can be shorter than the furnace 5.
  • the second induction furnace is only required if the furnace 5 is not sufficient to move along the entire length during the deformation three rolling stands 6, 7 and 9 existing further deformation device to set the corresponding temperature gradient, in such a way that when the last rolling stand 9 is pierced, the temperature is within the order of magnitude sufficient for good deformation.
  • the flat product 2 now referred to as strip 2 1 , has the desired thickness.
  • the method concludes either by reeling the rolled strip 2 1 on the reel 11 and severing at 10 after reaching the desired bundle or "coil" weight, or by severing the strip 2 1 in desired lengths and then stacking on a stacking device 12, which is shown schematically in FIG. 2.
  • the device for severing the belt 10 at the beginning of the work cycle can also be used to sever the starting strand (not shown here) which, after passing through the switched-off induction furnace 5 and the extended rollers of the shaping device 6, 7 and 9, and so on the possibly provided and also switched off intermediate heating device 8 is separated.
  • Corresponding adjusting devices are provided, by means of which the rollers are re-adjusted to the normal nip required for the deformation immediately after passing through the starting strand.
  • the heating devices 5 are preferably composed of mutually independent zones, so that, starting from the state of the switched-off furnace, the furnace zones passed through by the starting piece are successively switched on for heating.
  • the flat product 2 resulting from the casting and rolling process has a temperature of 1075 degrees C on leaving the first deformation stage 3, which drops to 1049 degrees C on the way to the descaling device 4. Due to the press water descaling provided in this arrangement, the temperature suddenly drops to 969 degrees C and cools down to furnace 5 to 934 degrees C.
  • the temperature rises again to 1134 degrees C, with temperature compensation taking place over the entire cross section of the flat product.
  • the latter experiences a decrease in the temperature to 1104 degrees C before reaching the mill stand 6, which due to the contact with the rolls in the mill stand is only 1063 degrees C as it exits the mill stand.
  • the partially rolled strip is heated in an intermediate inductive furnace 8 from 1020 degrees C to 1120 degrees C.
  • the temperature is 1090 degrees C and drops again to 1053 degrees C when leaving the roll stand until it has dropped to 988 degrees C when entering the third and last roll stand 9.
  • This temperature is sufficient as the piercing temperature for the last rolling process; the rolling stock 2 1 leaves the last rolling stand 9 at a temperature of 953 degrees C and is then separated and stacked in desired lengths at a still further reduced temperature or is wound up as shown in FIG. 1.
  • the speed in the exemplary embodiment when leaving the first deformation stage 3 is 0.08 m / sec. or 4.8 m / min. This corresponds to the piercing speed when entering the rolling stand of the further shaping device, where the thickness of the flat product is still 25 mm.
  • the tapping speed when entering the rolling stand 7 is 10.2 m / min. with simultaneous deformation of the flat product from 25 mm to 12.3 mm.
  • the rolling stock enters the last rolling stand at a speed of 19.8 m / min. and a thickness of 6.2 mm and leaves the mill stand with a finished thickness of 4.05 m and a speed of 30.6 m / min.
  • the heating preceding the first roll stand of the further shaping device and, if appropriate, intermediate heating between the first and further roll stands must be set such that the flat product or the rolled strip is heated after the first pass to a temperature of approx. 1100 degrees C and the temperature level is maintained so that the final rolling temperature in the last rolling stand does not fall below the limit of 860 degrees C.
  • a reel-up and reel-out device 12 is used.
  • the coiling and uncoiling device is installed behind the induction furnace 5.
  • the arrangement is supplemented by the descaling device 4.
  • the winding and unwinding reel 12 is wound with flat material until the desired coil size is reached. After the wound bundle has been brought into the unwinding position (on the right in the drawing), the flat material is fed for further processing to the further shaping devices 6, 7 and 9, which consist of one or more shaping frames.
  • an additional induction furnace 8 can be installed between the roll stands of the further shaping device.
  • the finished bundle is at 11, e.g. on a downcoiler.

Abstract

In a process for continuous production of steel strip or steel sheet, the flat product from the circular arc-type continuous casting plant is deformed, inductively reheated and further deformed in at least one deformation stage at roll speeds corresponding to the relevant reduction in roll pass. The invention also concerns a plant for implementing the process.

Description

PCI7DE89/00332 PCI7DE89 / 00332
1 -1 -
Verfahren zur kontinuierlichen Herstellung von Bandstahl oder Stahlblech aus nach dem Bogenstranggießverfahren hergestellten FlachproduktenProcess for the continuous production of steel strip or sheet steel from flat products produced by the continuous sheet casting process
Die Erfindung betrifft ein Verfahren zur kontinuierlich Herstellung von Bandstahl oder Stahlblech aus nach dem Bogenstranggießverfahren mit horizontaler Auslauf¬ richtung hergestellten Flachprodukten.The invention relates to a process for the continuous production of steel strip or sheet steel from flat products produced by the sheet continuous casting process with a horizontal outlet direction.
In der Stahlindustrie, sei es aus einer allgemeinen Tendenz heraus oder mit dem Ziel der Überwindung der Krise, der sich in den vergangenen Jahren besonders die Betreiber überalterter Anlagen gegenübersahen, besteht eine starke Notwendigkeit zur Senkung der Betriebs- und Investitionskosten bei gleichzeitiger Verbesserung der Produktqualität und Steigerung der Flexibilität bezogen auf die produzierten Mengenein¬ heiten, also die sogenannten "Coils" bzw. Stahlbleche. Mit der Modernisierung bestehender Stahlwerke bzw. der Planung und Realisierung neuer Stahlwerke mit Hilfe neuer technologischer Konzepte und Einrichtungen wird eine Steigerung der Produktivität und der Wirt¬ schaftlichkeit bei gleichzeitiger Verbesserung der Produktqualität sowie ein größerer Spielraum bei der "Stückgröße" angestrebt, in der das Endprodukt zwecks optimaler Streubreite der Verwendungsmöglichkeiten ausgestoßen werden soll. Eine der neuen Technologien, die im Hinblick auf die aktuellen Anforderungen an die Stahlproduktion zur Zeit vorangetrieben, werden, betrifft die Be- arbeitungsstufen zwischen dem Schmelzen des Stahls und dem Aufhaspeln des Bandstahls in Form von Rollen oder "Coils" bzw. dem Stapeln von Blechen und umfaßt das Gießen von Dünnbrammen in endabmessungsnaher Dicke, die sodann in nur wenigen nachfolgenden Stichen bzw. Verformungsschritten zum gewünschten Endprodukt weiterverarbeitet werden können. Dies hat zu beachtenswerten Verbesserungen in der Stranggie߬ technik geführt, besonders im Hinblick auf die Kon¬ struktion der Kokille sowie des entsprechenden Tauch¬ ausgusses, sowie zu Verbesserungen in der Konstruktion der Walzgerüste und -straßen mit dem Ziel, in möglichs wenigen Stichen die angestrebte Verformung zu erreicheIn the steel industry, whether due to a general tendency or with the aim of overcoming the crisis, which has been faced in particular by operators of outdated plants in recent years, there is a strong need to reduce operating and investment costs while at the same time improving product quality and Increase in flexibility based on the quantity units produced, ie the so-called "coils" or steel sheets. With the modernization of existing steelworks or the planning and implementation of new steelworks with the help of new technological concepts and facilities, an increase in productivity and profitability with simultaneous improvement in product quality as well as greater scope for the "piece size" in which the end product is sought for the purpose of optimally spreading the possible uses. One of the new technologies that are currently being advanced with regard to the current requirements for steel production concerns the processing stages between the melting of the steel and the reeling of the steel strip in the form of rolls or “coils” or the stacking of sheets and includes the casting of thin slabs with a thickness close to the final dimension, which can then be processed into the desired end product in only a few subsequent passes or deformation steps. This has led to remarkable improvements in continuous casting technology, particularly with regard to the construction of the mold and the corresponding immersion nozzle, and to improvements in the construction of the roll stands and lines with the aim of achieving the desired in as few passes as possible To achieve deformation
Es sind -wenn auch unter der Bezeichnung "Pilotanlagen Anlagen zur Herstellung von Bandstahl bekannt geworden in denen nach dem Stranggießverfahren Dünnbrammen von ca. 50 mm Dicke produziert werden, gegenüber her¬ kömmlichen Brammen mit einem Dickenbereich von 150 bis 320 mm. Diese Dünnbra men durchlaufen hierbei auf unterschiedliche Weise die aufeinanderfolgenden Walz-/Verarbeitungsschritte; das Endprodukt ist Bandstahl von nur wenigen Millimetern Dicke. Es wurde vorgeschlagen, bereits das Gießprodukt -unmittelbar nach einer Zwisehe erwärmung in einem Ofen- auszu¬ walzen, z.B. in einer Tandemstraße mit sechs Gerüsten. There are also plants known for the production of strip steel, in which thin slabs of approximately 50 mm thickness are produced by the continuous casting process, compared to conventional slabs with a thickness range of 150 to 320 mm. These thin brakes pass through the successive rolling / processing steps in different ways, the end product being steel strip of only a few millimeters in thickness, and it has been proposed that the cast product be rolled out immediately after being heated in a furnace, for example in a tandem mill with six stands.
Da die Gießgeschwindigkeit nicht viel schneller als ca. 5 m/min. sein kann, ergeben sich dementsprechend am letzten Gerüst der Walzstraße zu niedrige Walz¬ geschwindigkeiten, um die erforderlichen Endwalz¬ temperaturen von mindestens ca. 865 Grad C beibehalten zu können. D.h. , das Band erfährt zwischen einer Walz¬ stufe und der darauffolgenden eine zu starke Abkühlung aufgrund der mit der Gießgeschwindigkeit identischen geringen Geschwindigkeit beim Eintritt in die Walz¬ straße. Man ist deshalb von dieser Lösung abgerückt, weil auch mit Wärmeschutzeinrichtungen und beheizten Walzen das Problem nicht wirtschaftlich lösbar war; denn dies hätte einen erheblichen Anstieg der Investi- tions- und Betriebskosten zur Folge.Since the casting speed is not much faster than about 5 m / min. accordingly, the last stand of the rolling mill results in rolling speeds which are too low in order to be able to maintain the required final rolling temperatures of at least approximately 865 degrees C. That , the strip experiences too much cooling between one rolling stage and the subsequent one, owing to the low speed identical to the casting speed when it enters the rolling train. One has moved away from this solution because the problem could not be solved economically even with heat protection devices and heated rollers; because this would result in a significant increase in investment and operating costs.
Ein anderer Lösungsvorschlag sieht das Abtrennen des Bandes vor einem Wärmeofen vor, in dem anschließend die Wärmebehandlung (Ausgleich der Temperatur) des Bandes Über seinen gesamten Querschnitt vorgenommen wird. Dies kann z.B. ein gasbeheizter Rollenofen sein, mit dem unabhängig von der zu berücksichtigenden Gie߬ geschwindigkeit am Ofenaustritt eine Bandtemperatur von ca. 1100 Grad C eingestellt werden kann, also eine für den nachfolgenden Walzprozeß optimale Tem¬ peratur. Das Band wird auf eine Standardlänge ge¬ schnitten, die beispielsweise für ein bestimmtes Coil- gewicht bei 50 m liegen kann, wofür eine entsprechende Ofenlänge von ca. 150 m benötigt wird, wenn man die erforderliche Pufferwirkung in Betracht zieht. Another proposed solution provides for the strip to be cut off in front of a heating furnace, in which the strip is then heat-treated (temperature compensation) over its entire cross-section. This can be, for example, a gas-heated roller furnace, with which a strip temperature of approx. 1100 degrees C can be set independently of the casting speed to be taken into account at the furnace outlet, that is to say an optimum temperature for the subsequent rolling process. The strip is cut to a standard length, which can be, for example, 50 m for a specific coil weight, for which a corresponding furnace length of approximately 150 m is required if the required buffer effect is taken into account.
Durch Entkopplung der Walzstraße vom eigentlichen Gießvorgang, kann das Auswalzen der Dünnbramme bzw. des "Vorbandes" bei höheren Geschwindigkeiten durch¬ geführt werden, und somit ist ein Abfallen der Tem¬ peratur unter die für die Endwalzstufe zulässige Mindesttemperatur nicht zu befürchten. Dabei ergibt sich aus der Überlänge des Ofens -die ungefähr das 3-fache der Länge des Bandabschnittes beträgt- außer dem erheblichen Anstieg der Anlagen-Investitions¬ kosten noch ein enormer Platzbedarf, auf den viele Stahlwerke nicht eingerichtet sind.By decoupling the rolling mill from the actual casting process, the thin slab or the "preliminary strip" can be rolled out at higher speeds, and there is therefore no fear of the temperature dropping below the minimum temperature permitted for the final rolling stage. In addition to the considerable increase in system investment costs, the excess length of the furnace, which is approximately 3 times the length of the strip section, also results in an enormous space requirement, on which many steelworks are not equipped.
Darüber hinaus setzen die Abmessungen der Anlage und somit des Ofens der Länge der aufeinanderfolgenden zu behandelnden BandabschnitteGrenzen und damit auch für das endgültige Bundgewicht, was wiederum den NutzungsSpielraum im Hinblick auf die Fertigung von Coils mit größtem Durchmesser begrenzen. Dement¬ sprechend bietet sich bei einer Anlage dieser Art auch nicht die Möglichkeit, noch dünnere Ausgangs¬ brammen einzusetzen, sollte dies durch die techno¬ logische Weiterentwicklung des Stranggießverfahrens möglich werden. Bei Annahme einer Ausgangsdicke von 25 mm -wie dies bereits hypothetisch getan wurde- an Stelle von 50 mm müßte zur Verwirklichung des¬ selben Bund-Endgewichtes das Band in Längen von ca. 100 m aufgeteilt werden, wofür für den Behandlungs¬ ofen eine Länge in der Größenordnung von ca. 300 m vorgesehen werden müßte, was praktisch und wirtschaft¬ lich nicht durchführbar ist. Das Ziel der vorliegenden Erfindung ist die Schaffung eines Verfahrens der eingangs beschriebenen Art sowie einer entsprechenden Anlage zur Durchführung dieses Verfahrens, mit der kontinuierlich Stahlband aus von einer Bogenstranggießanlage kommenden Flachprodukt hergestellt werden kann, ohne die vorgenannten Nach¬ teile zu übernehmen.In addition, the dimensions of the system and thus of the furnace set limits for the length of the successive strip sections to be treated and thus also for the final coil weight, which in turn limits the scope for use with regard to the production of coils with the largest diameter. Accordingly, a plant of this type does not offer the possibility of using even thinner starting slabs, should this become possible due to the technological development of the continuous casting process. Assuming an initial thickness of 25 mm - as has already been hypothetically done - instead of 50 mm, the band would have to be divided into lengths of approximately 100 m in order to achieve the same final bundle weight, for which a length in for the treatment furnace would have to be provided on the order of 300 m, which is convenient and economic ¬ Lich not feasible. The aim of the present invention is to create a method of the type described at the outset and a corresponding system for carrying out this method, with which steel strip can be produced continuously from flat product coming from a continuous sheet caster without taking on the aforementioned disadvantages.
Insbesondere soll auf ein Trennen des Strangs zwischen dem Gießvorgang und mindestens dem ersten Walzvorgang verzichtet werden, wobei der Anstich des Gießstranges im ersten Walzgerüst mit derjenigen Geschwindigkeit erfolgt, mit dem das Walzgut die Bogenstrecke der Strang- gießanlage verläßt. Das Verfahren soll somit "in line" mit praktisch unbegrenzter Flexibilität durchgeführt werden, so daß es möglich wird, Coils von beliebigem Gewicht und beliebiger Länge oder Bleche herzustellen, ohne die Dimensionsparameter der Anlage zu verändern, da das Abtrennen des ausgewalzten Bandes mindestens nach dem ersten Walzvorgang oder nach Durchführung aller Arbeitsgänge unmittelbar vor der Aufhaspel- oder Stapelvorrichtung vorgenommen wird.In particular, there is no need to separate the strand between the casting process and at least the first rolling process, the tapping of the casting strand in the first roll stand being carried out at the speed at which the rolling stock leaves the arc section of the continuous casting installation. The process is thus said to be carried out "in line" with practically unlimited flexibility, so that it is possible to produce coils of any weight and length or sheets without changing the dimensional parameters of the system, since the rolled strip is separated at least after the first Rolling process or after all operations are carried out immediately before the reel-up or stacking device.
Gelöst wird die Aufgabe durch ein Verfahren, das durch die folgenden Verfahrensschritte gekennzeichnet ist:The task is solved by a process which is characterized by the following process steps:
a) Verformung des Flachproduktes nach Durcherstarrung des Stranges in einer ersten Verformungsstufe bei Temperaturen von mehr als 1100 Grad C, b) induktives Wiederaufheizen bis auf eine Temperatur von ca. 1100 Grad C bei bestmöglichem Tempera¬ turausgleich über den gesamten Querschnitt des Flachproduktes,a) deformation of the flat product after solidification of the strand in a first deformation stage at temperatures of more than 1100 degrees C, b) inductive reheating up to a temperature of approx. 1100 degrees C with the best possible temperature compensation over the entire cross section of the flat product,
c) Verformung des Flachproduktes in mindestens einer weiteren Verformungsstufe bei Walzgeschwindig¬ keiten entsprechend der jeweiligen Stichabnahme.c) Deformation of the flat product in at least one further deformation stage at rolling speeds in accordance with the respective pass reduction.
In Ausgestaltung des Verfahrens wird vorgeschlagen, das Band zwischen dem ersten und dem weiteren Ver¬ formungsvorgang aufzuhaspeln. Man kann das ausgewalzte Band entsprechend dem gewünschten Bundgewicht im An¬ schluß an das Verformen des Flachproduktes aufhaspeln oder nach Abtrennen des ausgewalzten Bandes im An¬ schluß an die Verformung des Flachproduktes in vor¬ gegebenen Längen zu Stahlblechpaketen stapeln, ggf. nach Abkühlen und Richten. Das Flachprodukt wird also zunächst in einem ersten Walzgerüst mit der Ausgangs¬ geschwindigkeit des Produktes aus der Bogenstranggieß- anlage angestochen und durchläuft die aufeinanderfol¬ genden Walzstufen jeweils mit Geschwindigkeiten, die den Verformungen in den einzelnen Stichen entsprechen. ' Das derartig gewalzte Band wird anschließend entweder aufgehaspelt und, nachdem das gewünschte Coil-Gewicht erreicht ist, abgetrennt oder das Band wird in ge¬ wünschte Längen unterteilt und zu Blechen gestapelt. Ein wesentlicher Aspekt der vorliegenden Erfindung ist das induktive Wiederaufheizen des Flachproduktes nach dem Entzundern auf Temperaturen von ca. 1100 Grad mit bestmöglichem Temperaturausgleich, weil so einer Unterkühlung des Bandes in günstiger Weise entgegen¬ gewirkt werden kann.In an embodiment of the method, it is proposed to wind up the strip between the first and the further shaping process. The rolled-out strip can be reeled in according to the desired coil weight following the shaping of the flat product or, after the rolled-out strip has been separated off after the shaping of the flat product, can be stacked in predetermined lengths into sheet steel packages, if necessary after cooling and straightening. The flat product is thus first pierced in a first roll stand at the output speed of the product from the continuous sheet casting installation and passes through the successive rolling stages at speeds corresponding to the deformations in the individual passes. 'The thus-rolled strip is then either coiled and, after the coil weight is reached desired, separated or the tape is divided into ge desired lengths and stacked in sheets. An essential aspect of the present invention is the inductive re-heating of the flat product after descaling to temperatures of approximately 1100 degrees with the best possible temperature compensation, because in this way an undercooling of the strip can be counteracted in a favorable manner.
In einer weiteren Ausgestaltung der Erfindung ist vor¬ gesehen, eine oder mehrere Stufen der induktiven Zwischenerwärmung des Flachproduktes zwischen den ge¬ nannten Verformungsstufen vorzusehen. Durch diese Zwisehenerwärmung wird ebenfalls einer zu starken Abkühlung des Walzgutes entgegengewirkt, so daß stets die notwendigen Walztemperaturen derart eingestellt werden können, daß in der letzten Verformungsstufe die Temperaturen nicht unter den Grenzwert von 860 Grad C absinken.In a further embodiment of the invention it is provided to provide one or more stages of the inductive intermediate heating of the flat product between the above-mentioned deformation stages. This intermediate heating also counteracts excessive cooling of the rolling stock, so that the necessary rolling temperatures can always be set such that the temperatures in the last deformation stage do not drop below the limit of 860 degrees C.
Nach einem anderen Vorschlag der Erfindung sind zu¬ sätzlich folgende Schritte vorgesehen:According to another proposal of the invention, the following additional steps are provided:
Einstellen der Verformungsstufen nach Durchlauf¬ eines Anfahrstranges, der beim Gießvorgang vor¬ gesehen wird;Setting the deformation stages after passing through a starting strand which is provided during the casting process;
Abtrennen des Anfahrstranges unmittelbar vor dem Aufhaspeln des Bandes oder vor dem Stapeln der Bleche; Differenzierte Heizregelung in aufeinanderfolgenden Stufen/Zonen nach Durchlauf des Anfahrstranges.Cutting off the start-up strand immediately before reeling up the strip or before stacking the sheets; Differentiated heating control in successive stages / zones after passing through the start-up line.
Der Anfahrstrang kann nach Durchlauf durch die Walz¬ gerüste mit derjenigen Einrichtung abgetrennt werden, die zum Unterteilen der gewalzten Bänder ohnehin vor¬ handen ist, oder er kann durch eine weitere Trennvor¬ richtung hinter der ersten Verformungsstufe abgetrennt werden.After passing through the rolling stands, the starting strand can be cut off with the device which is present anyway for dividing the rolled strips, or it can be cut off by a further separating device downstream of the first deformation stage.
Die Anlage zur Durchführung des erfindungsgemäßen Ver¬ fahrens ist gekennzeichnet durch die nachstehend ge¬ nannten Anlagenteile in der aufgezeigten Reihenfolge:The plant for carrying out the method according to the invention is characterized by the plant parts mentioned below in the order shown:
a) Eine Kokille für den kontinuierlichen Guß von Flach- produkta mit anschließendem Führungsgerüst in Bogenform,a) a mold for the continuous casting of flat products with a subsequent guide frame in an arch shape,
b) eine erste Verformungseinriehtung zur Verformung de Flachproduktes im Führungsgerüst und/oder unmittel¬ bar daran anschließend,b) a first deformation device for deforming the flat product in the guide frame and / or directly thereafter,
c) eine Vorrichtung zum induktiven Aufheizen und für den Temperaturausgleich über den Querschnitt des Flachproduktes,c) a device for inductive heating and for temperature compensation over the cross section of the flat product,
d) mindestens ein weiteres Walzgerüst undd) at least one further roll stand and
e) eine Trennvorrichtung. Die Trennvorrichtung kann hinter der ersten Ver¬ formungseinrichtung angeordnet sein und zwischen der ersten Verformungseinrichtung und der weiteren Ver¬ formungseinrichtung kann eine Einrichtung zum Auf- und Abhaspeln des Flachproduktes vorgesehen sein, der die Trenneinrichtung vorgeordnet ist. Vorzugs¬ weise ist die Einrichtung zum Auf- und Abhaspeln des Flachproduktes hinter der Vorrichtung zum induktiven Aufheizen und vor der weiteren Verformungseinrichtung angeordnet.e) a separator. The separating device can be arranged behind the first deforming device and between the first deforming device and the further deforming device there can be a device for winding and unwinding the flat product, which is arranged upstream of the separating device. The device for winding and unwinding the flat product is preferably arranged behind the device for inductive heating and in front of the further deformation device.
Alternativ ist erfindungsgemäß dieser Anlage ent¬ weder eine Abtrennvorrichtung für das Walzband und mindestens ein Haspel zum Aufhaspeln des Bandes nach¬ geordnet oder eine Abtrenneinrichtung für das Walz¬ band, eine Kühleinrichtung, eine Richtmaschine und eine Stapelvorrichtung für die abgetrennten Bleche.Alternatively, according to the invention, either a separating device for the rolled strip and at least one reel for winding the strip is arranged downstream of this system, or a separating device for the rolled strip, a cooling device, a straightening machine and a stacking device for the separated metal sheets.
In einer weiteren Ausgestaltung der Erfindung umfaßt die Anlage zusätzlich mindestens eine Vorrichtung zum induktiven Aufheizen zur Zwischenerwärmung zwischen den weiteren Walzgerüsten.In a further embodiment of the invention, the system additionally comprises at least one device for inductive heating for intermediate heating between the further rolling stands.
Günstigerweise ist jede dieser Vorrichtungen mit separ steuerbaren Heizstufen versehen. Entsprechend einer Ausgestaltung der Erfindung ist die Anlage außerdem mit Vorrichtungen zur.Einstellung des DurchlaufquerSchnittes zwischen den Rollen der ersten Verformungseinrichtung und den weiteren Walz¬ gerüsten ausgestattet, um den Durchlauf des am Kopf des Gießstranges sitzenden AnfahrStranges zu ermög¬ lichen und unmittelbar nach dessen Durchlauf die Querschnitte wieder auf die üblichen Durchlaufwerte zurückzuführen. Vorrichtungen zur successiven Steu¬ erung der einzelnen Aufheizstufen der Öfen unmittel¬ bar nach dem Durchlauf des AnfahrStranges, wobei die Trennvorrichtung zum Abtrennen des AnfahrStranges diejenige ist, die auch zum Abtrennen des Walzbandes eingesetzt wird, nämlich die am Endabschnitt der Anlage befindliche Trennvorrichtung.Each of these devices is advantageously provided with separately controllable heating stages. According to one embodiment of the invention, the system is also equipped with devices for adjusting the cross-section of the passage between the rollers of the first shaping device and the further rolling stands in order to enable the start-up strand located at the head of the casting strand to pass and immediately after it has passed Cross sections can be traced back to the usual throughput values. Devices for the successive control of the individual heating stages of the furnaces immediately after passing through the starting strand, the separating device for separating the starting strand being the one that is also used for separating the rolled strip, namely the separating device located at the end section of the system.
Nach einem anderen Vorschlag der Erfindung wird die Trennvorrichtung zum Abtrennen des Anfahrstranges verwendet, die sich hinter der ersten Verformungs¬ stufe befindet.According to another proposal of the invention, the separating device for separating the starting strand is used, which is located behind the first deformation stage.
Zur Erläuterung der Erfindung wird nachfolgend ein Ausführungsbeispiel beschrieben, das in Zeichnungen dargestellt ist.To explain the invention, an embodiment is described below, which is shown in drawings.
Es zeigt: PCI7DE89/00332 3It shows: PCI7DE89 / 00332 3
- 11 -- 11 -
Fig. 1 eine schematische Teildarstellung der er- findungsgemäßen Anlage und1 is a schematic partial representation of the system according to the invention and
Fig. 2 den Temperaturverlauf des Stahlbandes,2 shows the temperature profile of the steel strip,
Fig. 3 eine abgewandelte Ausführun sform der Erfindung.Fig. 3 shows a modified embodiment of the invention.
In der Zeichnung ist grob schematisch die erfindungs¬ gemäße Anlage dargestellt, anhand der das entsprechende Verfahren beschrieben wird. Ausgehend von einer Strang¬ guß-Kokille, die in der Zeichnung mit 1 gekennzeichnet ist, entsteht das Flacherzeugnis 2. Das in herkömm¬ lichen Stützrollen geführte und transportierte Flach¬ produkt 2 geht von der anfänglichen vertikalen Richtung über die von den Stützrollen gebildete Bogenstrecke in die horizontale Lage über. Nach Durcherstarrung, nämlich im Endbereich der Bogenstrecke, durchläuft das Flachprodukt gemäß der Erfindung eine erste Verformungs¬ stufe 3, in der es beispielsweise auf eine Dicke von maximal 25 mm gebracht wird. Die Verformungsstufe 3 kann aus einer oder mehreren Walzeinrichtungen, vor¬ zugsweise in Quarto-Anordnung, bestehen.In the drawing, the system according to the invention is roughly shown schematically, by means of which the corresponding method is described. Starting from a continuous casting mold, which is identified in the drawing by 1, the flat product 2 is produced. The flat product 2 guided and transported in conventional support rollers passes from the initial vertical direction over the arc section formed by the support rollers the horizontal position over. After solidification, namely in the end region of the arc section, the flat product according to the invention passes through a first deformation stage 3, in which it is brought to a maximum thickness of 25 mm, for example. The deformation stage 3 can consist of one or more rolling devices, preferably in a four-way arrangement.
Zum Temperaturausgleich ist im Anschluß ein Ofen 5 vor¬ gesehen, der vorzugsweise mit einer induktiven Auf¬ heizvorrichtung ausgestattet ist. In diesem Ofen 5 er¬ folgt gleichzeitig ein Temperaturausgleich über den ge¬ samten Querschnitt des Flachproduktes 2, so daß dieses das erste Gerüst 6 der weiteren Verformungseinrichtung mit ausreichender Walztemperatur erreicht. Sollte eine zu langsame Anstichgeschwindigkeit ent¬ sprechend der beim Austritt aus der Bogenstrecke ge¬ fahrenen Geschwindigkeit zu einem beträchtlichen Ab¬ sinken der Temperatur führen, so daß sich im zweiten Walzgerüst 7 der weiteren Verformungseinrichtung eine unzureichende Verformungstemperatur ergibt, so kann ggfs. eine weitere Zwischenerwärmung in Form eines zweiten Induktionsofens 8 zwischen den Walzgerüsten 6 und 7 vorgesehen werden, der kürzer sein kann als der Ofen 5. Der zweite Induktionsofen ist jedoch nur dann erforderlich, wenn der Ofen 5 nicht ausreicht, um während der Verformung entlang der gesamten, aus den drei Walzgerüsten 6, 7 und 9 bestehenden weiteren Verformungseinrichtung das entsprechende Temperatur¬ gefälle einzustellen, und zwar derart, daß beim An¬ stich in das letzte Walzgerüst 9 die Temperatur inner¬ halb der für eine gute Verformung ausreichenden Größen¬ ordnung liegt. Beim Austritt aus dem letzten Walz¬ gerüst 9 weist das nun als Band 21 bezeichnete Flach¬ produkt 2 die gewünschte Dicke auf.To equalize the temperature, a furnace 5 is then provided, which is preferably equipped with an inductive heating device. In this furnace 5 there is a temperature equalization over the entire cross section of the flat product 2, so that it reaches the first stand 6 of the further shaping device with a sufficient rolling temperature. If a piercing speed which is too slow, corresponding to the speed at exit from the sheet path, leads to a considerable drop in temperature, so that an insufficient deformation temperature results in the second roll stand 7 of the further deformation device, then further intermediate heating can possibly take place in the form of a second induction furnace 8 between the roll stands 6 and 7, which can be shorter than the furnace 5. However, the second induction furnace is only required if the furnace 5 is not sufficient to move along the entire length during the deformation three rolling stands 6, 7 and 9 existing further deformation device to set the corresponding temperature gradient, in such a way that when the last rolling stand 9 is pierced, the temperature is within the order of magnitude sufficient for good deformation. When emerging from the last roll stand 9, the flat product 2, now referred to as strip 2 1 , has the desired thickness.
Das Verfahren schließt entweder mit dem Aufhaspeln des gewalzten Bandes 21 auf dem Haspel 11 und dem Abtrennen bei 10 nach Erreichen des gewünschten Bund- oder "Coil"-Gewichts oder mit dem Abtrennen des Bandes 21 in gewünschten Längen und anschließendem Stapeln auf einer Stapeleinrichtung 12 ab, die in Fig. 2 schema¬ tisch eingezeichnet ist. Ohne die Notwendigkeit zusätzlicher Trennvorrichtungen kann die Vorrichtung zum Abtrennen des Bandes 10 zu Beginn des Arbeitstaktes auch zum Abtrennen des (hier nicht dargestellten) AnfahrStranges benutzt werden, der nach Durchlaufen des ausgeschalteten Induktionsofens 5 und der auseinandergefahrenen Walzen der Verformungseinrichtung 6, 7 und 9 -sowie der eventuell vorgesehenen und ebenfalls abgeschalteten Zwischenerwärmungseinrichtung 8- abgetrennt wird. Es sind entsprechende Anstellvorrichtungen vorgesehen, mit denen unmittelbar nach Durchlaufen des Anfahr¬ stranges die Walzen auf den für die Verformung benö¬ tigten normalen Walzspalt wieder angestellt werden. Weiterhin setzen sich die Aufheizvorrichtungen 5 vorzugsweise aus untereinander unabhängigen Zonen zusammen, so daß ausgehend vom Zustand des abgeschal¬ teten Ofens die jeweils vom Anfahrstück durchlaufenen Ofenzonen nacheinander zum Aufwärmen eingeschaltet werden.The method concludes either by reeling the rolled strip 2 1 on the reel 11 and severing at 10 after reaching the desired bundle or "coil" weight, or by severing the strip 2 1 in desired lengths and then stacking on a stacking device 12, which is shown schematically in FIG. 2. Without the need for additional separating devices, the device for severing the belt 10 at the beginning of the work cycle can also be used to sever the starting strand (not shown here) which, after passing through the switched-off induction furnace 5 and the extended rollers of the shaping device 6, 7 and 9, and so on the possibly provided and also switched off intermediate heating device 8 is separated. Corresponding adjusting devices are provided, by means of which the rollers are re-adjusted to the normal nip required for the deformation immediately after passing through the starting strand. Furthermore, the heating devices 5 are preferably composed of mutually independent zones, so that, starting from the state of the switched-off furnace, the furnace zones passed through by the starting piece are successively switched on for heating.
Figur 2 zeigt anhand der schematischen Darstellung der einzelnen Abschnitte für eine Anlage gemäß der Figur 1 (unter Verwendung gleicher Bezeichnungen) den Tem-~ peraturverlauf des Flachproduktes 2 bis zum Austritt des Bandes 2' aus dem letzten Walzgerüst. Unterhalb des Kurvenbildes ist eine Tabelle dargestellt, aus der in Übereinstimmung mit bestimmten Abschnitten der Anlage und den entsprechenden Abschnitten des Bandes die jeweilige Geschwindigkeit bei entsprechender Dicke ersichtlich ist. Die aufgezeichneten Werte wurden versuchsweise mit einem Band von 1000 mm Breite und 25 mm Dicke erzielt. Selbstverständlich wird bei anderen Abmessungen und Geschwindigkeiten ein anderer Temperaturverl uf zu verzeichnen sein.2 shows reference to the schematic representation of the individual portions of a plant according to the Figure 1 (using equal numbers) the tem- ~ peraturverlauf of the flat product 2 to the exit of the tape 2 'from the last rolling stand. Below the graph is a table from which, in accordance with certain sections of the system and the corresponding sections of the Band the respective speed can be seen with appropriate thickness. The recorded values were experimentally obtained with a tape 1000 mm wide and 25 mm thick. Of course, with different dimensions and speeds, there will be a different temperature profile.
Aus der Figur ergibt sich, daß das aus dem Gießwalz¬ vorgang hervorgegangene Flacherzeugnis 2 beim Austritt aus der ersten Verformungsstufe 3 eine Temperatur von 1075 Grad C au weist, die auf dem Weg zur Ent- zunderungsvorrichtung 4 auf 1049 Grad C absinkt. Bedingt durch die bei dieser Anordnung vorgesehene Preßwasser-Entzunderung sinkt die Temperatur jäh auf 969 Grad C ab und kühlt bis zum Ofen 5 weiter auf 934 Grad C ab.It can be seen from the figure that the flat product 2 resulting from the casting and rolling process has a temperature of 1075 degrees C on leaving the first deformation stage 3, which drops to 1049 degrees C on the way to the descaling device 4. Due to the press water descaling provided in this arrangement, the temperature suddenly drops to 969 degrees C and cools down to furnace 5 to 934 degrees C.
Im Ofen bzw. in der induktiven AufheizVorrichtung 5 steigt die Temperatur wieder bis auf 1134 Grad C an, wobei ein Temperaturausgleich über den gesamten Quer¬ schnitt des Flachproduktes erfolgt. Letzteres erfährt vor Erreichen des Walzgerüstes 6 eine Abnahme der Temperatur auf 1104 Grad C, die infolge des Kontaktes mit den Walzen im Walzgerüst beim Austritt aus dem Walzgerüst nur noch 1063 Grad C beträgt. Im geschil¬ derten Fall wird das teilgewalzte Band in einem zwischengeschalteten induktiven Ofen 8 von 1020 Grad C auf 1120 Grad C aufgeheizt. In the furnace or in the inductive heating device 5, the temperature rises again to 1134 degrees C, with temperature compensation taking place over the entire cross section of the flat product. The latter experiences a decrease in the temperature to 1104 degrees C before reaching the mill stand 6, which due to the contact with the rolls in the mill stand is only 1063 degrees C as it exits the mill stand. In the case described, the partially rolled strip is heated in an intermediate inductive furnace 8 from 1020 degrees C to 1120 degrees C.
Beim Anstich in das zweite Walzgerüst 7 liegt die Temperatur bei 1090 Grad C und sinkt beim Verlassen des Walzgerüstes wieder auf 1053 Grad C ab, bis sie bei Eintritt in das dritte und letzte Walzgerüst 9 auf 988 Grad C abgefallen ist. Diese Temperatur ist als Anstichtemperatur für den letzten Walzvorgang ausreichend; das Walzgut 21 verläßt das letzte Walz¬ gerüst 9 mit einer Temperatur von 953 Grad C und wird danach bei noch weiter abgesunkener Temperatur in ge¬ wünschten Längen abgetrennt und gestapelt oder wie in Fig. 1 dargestellt aufgehaspelt.When tapping into the second roll stand 7, the temperature is 1090 degrees C and drops again to 1053 degrees C when leaving the roll stand until it has dropped to 988 degrees C when entering the third and last roll stand 9. This temperature is sufficient as the piercing temperature for the last rolling process; the rolling stock 2 1 leaves the last rolling stand 9 at a temperature of 953 degrees C and is then separated and stacked in desired lengths at a still further reduced temperature or is wound up as shown in FIG. 1.
Was den Geschwindigkeitsverlauf anbelangt, so liegt im Ausführungsbeispiel die beim Verlassen der ersten Verformungsstufe 3 gefahrene Geschwindigkeit bei 0,08 m/sec. oder 4,8 m/min. Dies entspricht der Anstich¬ geschwindigkeit beim Eintritt in das Walzgerüst der weiteren Verformungseinrichtung, wo die Dicke des Flacherzeugnisses noch 25 mm beträgt. Die Anstichge¬ schwindigkeit bei Eintritt in das Walzgerüst 7 liegt bei 10,2 m/min. bei gleichzeitiger Verformung des Flachproduktes von 25 mm auf 12,3 mm. In das letzte Walzgerüst tritt das Walzgut mit einer Geschwindigkeit von 19,8 m/min. und einer Dicke von 6,2 mm ein und verläßt das Walzgerüst mit einer Fertigdicke von 4,05 m und einer Geschwindigkeit von 30,6 m/min. As far as the speed curve is concerned, the speed in the exemplary embodiment when leaving the first deformation stage 3 is 0.08 m / sec. or 4.8 m / min. This corresponds to the piercing speed when entering the rolling stand of the further shaping device, where the thickness of the flat product is still 25 mm. The tapping speed when entering the rolling stand 7 is 10.2 m / min. with simultaneous deformation of the flat product from 25 mm to 12.3 mm. The rolling stock enters the last rolling stand at a speed of 19.8 m / min. and a thickness of 6.2 mm and leaves the mill stand with a finished thickness of 4.05 m and a speed of 30.6 m / min.
Wie aus dem vorgenannten Ausführungsbeispiel, das im Prinzip auf andere Bandquerschnitte übertragbar ist, hervorgeht, ist die dem ersten Walzgerüst der weiteren Verformungseinrichtung vorausgehende Erwärmung und ggfs. zwischen dem ersten und weiteren Walzgerüsten erfolgende Zwischenerwärmung so einzustellen, daß eine Aufheizung des Flachproduktes bzw. des Walzbandes nach dem ersten Stich auf eine Temperatur von ca. 1100 Grad C stattfindet und das Temperaturniveau so gehalten wird, daß die Endwalztemperatur im letzten Walzgerüst den Grenzwert von 860 Grad C nicht unter¬ schreitet.As can be seen from the aforementioned exemplary embodiment, which can in principle be transferred to other strip cross sections, the heating preceding the first roll stand of the further shaping device and, if appropriate, intermediate heating between the first and further roll stands must be set such that the flat product or the rolled strip is heated after the first pass to a temperature of approx. 1100 degrees C and the temperature level is maintained so that the final rolling temperature in the last rolling stand does not fall below the limit of 860 degrees C.
Bei dem in Figur 3 dargestellten abgewandelten Aus- führungsbeispiel wird eine Auf- und Abhaspelvorrichtung 12 verwendet. Wie die Zeichnung zeigt, ist in diesem Fall die Auf- und Abhaspelvorrichtung hinter dem In¬ duktionsofen 5 eingebaut. Die Anordnung wird durch die Entzunderungsvorrichtung 4 ergänzt. Der Auf- und Ab¬ wickelhaspel 12 wird bis zum Erreichen der gewünschten Coilgröße mit Flachmaterial bewickelt. Nachdem der aufgewickelte Bund in die (in der Zeichnung rechts befindliche) Abwickelstellung gebracht worden ist, wir das Flachmaterial zur weiteren Bearbeitung der aus einem oder mehreren Verformungsgerüsten bestehenden weiteren Verformungseinrichtung 6, 7 und 9 zugeführt. In the modified exemplary embodiment shown in FIG. 3, a reel-up and reel-out device 12 is used. In this case, as the drawing shows, the coiling and uncoiling device is installed behind the induction furnace 5. The arrangement is supplemented by the descaling device 4. The winding and unwinding reel 12 is wound with flat material until the desired coil size is reached. After the wound bundle has been brought into the unwinding position (on the right in the drawing), the flat material is fed for further processing to the further shaping devices 6, 7 and 9, which consist of one or more shaping frames.
Falls erforderlich, kann zwischen den Walzgerüsten der weiteren Verformungseinrichtung ein zusätzlicher In¬ duktionsofen 8 eingebaut werden. Der fertige Bund wird bei 11, z.B. auf einem Downcoiler, erzeugt.If necessary, an additional induction furnace 8 can be installed between the roll stands of the further shaping device. The finished bundle is at 11, e.g. on a downcoiler.
Selbstverständlich lassen sich alle Parameter der Anlag durch entsprechende Einstellung der Gießgeschwindigkeit, der Walzgeschwindigkeiten sowie der Verformungen unter¬ einander beeinflussen.Of course, all parameters of the plant can be influenced by adjusting the casting speed, the rolling speeds and the deformations among themselves.
Die vorstehende Beschreibung der Erfindung erläutert ein Verfahren sowie die für die Durchführung erforder¬ liche Anlage, die ein kontinuierliches Gießen und End¬ walzen eines Ausgangsproduktes bei geringen Anlagen¬ kosten und Energieaufwand ermöglichen. Es wurde fest¬ gestellt, daß die für die induktive Erwärmung erforder¬ liche Heizleistung die Grenzen von ca. 8 MW nicht über¬ steigt, was für ein Stahlwerk entsprechender Größen¬ ordnung als durchaus wirtschaftlich angesehen werden kann.The above description of the invention explains a method and the system required for carrying it out, which enable continuous casting and final rolling of a starting product with low system costs and energy expenditure. It was found that the heating power required for inductive heating does not exceed the limits of approximately 8 MW, which can be regarded as quite economical for a steel plant of a corresponding size.
Das beschriebene und dargestellte Konzept des mit der Erfindung vorgeschlagenen Verfahrens und die für seine Durchführung erforderliche Anlage können innerhalb der Zielsetzung der Erfindung variiert werden, besonders ka die vor der Walzstraße bzw. zwischen den Walzgerüsten v gesehene AufWärmevorrichtung durch andere als die genan ten Induktionsöfen ersetzt werden -so können beispiels¬ weise Öfen mit Lasertechnik, Strahlungsöfen etc. Ver¬ wendung finden. The described and illustrated concept of the method proposed by the invention and the system required for its implementation can be varied within the scope of the invention, especially the heating device seen in front of the rolling mill or between the roll stands v can be replaced by induction furnaces other than those mentioned ovens with laser technology, radiation ovens, etc. can thus be used, for example.

Claims

Patentansprüche Claims
1. Verfahren zur kontinuierlichen Herstellung von Band¬ stahl oder Stahlblech aus nach dem Bogenstranggie߬ verfahren mit horizontaler Auslaufriehtung herge¬ stellten Flachprodukten, welches durch die folgenden Phasen gekennzeichnet ist:1. Process for the continuous production of steel strip or sheet steel from flat products produced by the continuous sheet casting process with a horizontal outlet direction, which is characterized by the following phases:
a) Verformung des Flachproduktes (2) nach Erstarrung des Stranges in einer ersten Verformungsstu e (3) bei Temperaturen von mehr als 1100 Grad C,a) deformation of the flat product (2) after solidification of the strand in a first deformation stage (3) at temperatures of more than 1100 degrees C,
b) induktives Wiederaufheizen bis auf eine Tempera¬ tur von ca. 1100 Grad C bei bestmöglichem Tem¬ peraturausgleich über den gesamten Querschnitt des Flachproduktes,b) inductive reheating up to a temperature of approximately 1100 degrees C with the best possible temperature compensation over the entire cross section of the flat product,
c) Verformung des Flachproduktes in mindestens eine weiteren Verformun sstufe bei Walzgeschwindig- keiten entsprechend der jeweiligen Stichabnahme.c) Deformation of the flat product in at least one further deformation stage at rolling speeds in accordance with the respective pass reduction.
2. Verfahren nach Anspruch 1, gekennzeichnet durch das Aufhaspeln des Bandes zwischen dem ersten und dem weiteren Verformungsvorgang. PCI7DE89/00332 632. The method according to claim 1, characterized by reeling the tape between the first and the further shaping process. PCI7DE89 / 00332 63
- 19 -- 19 -
3. Verfahren nach Anspruch 1, gekennzeichnet durch das Aufhaspeln des ausgewalzten Bandes und Abtrennen entsprechend dem gewünschten Bundgewicht im Anschluß an das Verformen des Flachproduktes.3. The method according to claim 1, characterized by reeling the rolled strip and severing it according to the desired coil weight following the shaping of the flat product.
4. Verfahren nach Anspruch 1, gekennzeichnet durch das Abtrennen des ausgewalzten Bandes im Anschluß an die Verformung des Flachproduktes in vorgegebene Längen und Stapeln zu Stahlblechpaketen ggf. nach Abkühlen und Richten.4. The method according to claim 1, characterized by separating the rolled strip following the deformation of the flat product in predetermined lengths and stacks into steel sheet packages, if necessary after cooling and straightening.
5. Verfahren nach den Ansprüchen 1 bis 4, gekennzeichne durch eine oder mehrere Stu en der induktiven Zwischenerwärmung des Flachproduktes zwischen den weiteren Verformungsstufen.5. The method according to claims 1 to 4, marked by one or more hours of inductive intermediate heating of the flat product between the further deformation stages.
6. Verfahren nach einem der vorgenannten Patentansprüche einschl. der folgenden weiteren Stufen:6. The method according to one of the aforementioned claims, including the following further stages:
- Einstellen der Verformungsstufen nach Durchlaufen eines AnfahrStranges, der beim Gießvorgang vor¬ gesehen wird;- Setting the deformation levels after passing through a start-up strand, which is seen during the casting process;
Abtrennen des Anfahrstranges unmittelbar vor dem Aufhaspeln des Bandes oder dem Abtrennen der Bleche;Cutting off the start-up strand immediately before winding up the strip or cutting off the metal sheets;
- differenzierte Heizregelung in auf einanderfolgen Stufen/Zonen nach Durchlauf des AnfahrStranges. PCI7DE89/00332- Differentiated heating control in successive stages / zones after passing through the start-up line. PCI7DE89 / 00332
- 20 -- 20 -
7. Anlage zur Durchführung des Verfahrens nach Patentanspruch 1, gekennzeichnet durch die nach¬ stehend genannten Anlagenteile in der aufgezeigten Reihenfolge: a) Eine Kokille (l) für den kontinuierlichen Guß von Flachprodukten (2) mit anschließendem Führungsgerüst in Bogenform, b) eine erste Verformungseinrichtung zur Ver¬ formung des Flachproduktes im Führungsgerüst und/oder unmittelbar daran anschließend,7. Plant for performing the method according to claim 1, characterized by the following parts of the plant in the order shown: a) a mold (l) for the continuous casting of flat products (2) with a subsequent guide frame in the form of an arch, b) a first Deformation device for the deformation of the flat product in the guide frame and / or immediately thereafter,
c) eine Vorrichtung zum induktiven Aufheizen und für den Temperaturausgleich (5) über den Quer¬ schnitt des Flachproduktes (2), d) mindestens ein weiteres Walzgerüst (6, 7, 9) und e) eine Trennvorrichtung (S, 10).c) a device for inductive heating and for temperature compensation (5) over the cross section of the flat product (2), d) at least one further roll stand (6, 7, 9) and e) a separating device (S, 10).
8. Anlage nach Patentanspruch 7, dadurch gekenn¬ zeichnet, daß die Trennvorrichtung (S) hinter der ersten Verformungseinrichtung (3) angeordnet ist.8. Plant according to claim 7, characterized gekenn¬ characterized in that the separating device (S) is arranged behind the first deformation device (3).
9. Anlage nach den Patentansprüchen 7 und 8, dadurch gekennzeichnet, daß zwischen der ersten Verformung einrichtung (3) und der weiteren Verformungsein¬ richtung (6, 7, 9) eine Einrichtung zum Auf- und Abhaspeln (12) des Flachproduktes vorgesehen ist, der die Trenneinrichtung (S) vorgeordnet ist. PCI7DE89/003329. Plant according to claims 7 and 8, characterized in that a device for winding and unwinding (12) of the flat product is provided between the first deformation device (3) and the further deformation device (6, 7, 9), which precedes the separating device (S). PCI7DE89 / 00332
- 21 -- 21 -
10. Anlage nach dem Patentanspruch 9, dadurch ge¬ kennzeichnet, daß die Einrichtung zum. Auf- und Abhaspeln (12) des Flachproduktes hinter der Vorrichtung zum induktiven Aufheizen (5) und vor der weiteren Verformungseinrichtung (6, 7, 9) angeordnet ist.10. Plant according to claim 9, characterized ge indicates that the device for. Coiling and uncoiling (12) of the flat product is arranged behind the device for inductive heating (5) and in front of the further shaping device (6, 7, 9).
11. Anlage nach Anspruch 7, gekennzeichnet durch die Nachordnung einer AbtrennVorrichtung (10) für das Walzband (21) und mindestens eines Haspels (11) zum Aufhaspeln des Bandes (2*).11. Plant according to claim 7, characterized by the reordering of a separating device (10) for the rolled strip (2 1 ) and at least one reel (11) for reeling the strip (2 *).
12. Anlage nach Patent nspruch 7, dadurch gekenn¬ zeichnet, daß ihr eine AbtrennVorrichtung (10) für das Walzband (2), eine Kühleinrichtung, eine Richtwalze und eine Stapelvorrichtung (14) für die abgetrennten Bleche nachgeordnet ist.12. Plant according to patent claim 7, characterized in that it is followed by a separating device (10) for the rolled strip (2), a cooling device, a straightening roller and a stacking device (14) for the separated sheets.
13. Anlage nach Patentanspruch 7, dadurch gekenn¬ zeichnet, daß zusätzlich mindestens eine Vor¬ richtung (8) zum induktiven Aufheizen zur13. Plant according to claim 7, characterized gekenn¬ characterized in that in addition at least one Vor¬ device (8) for inductive heating for
Zwisehenerwärmung zwischen den weiteren Walz¬ gerüsten (6, 7, 9) vorgesehen ist.Intermediate heating between the further rolling stands (6, 7, 9) is provided.
14. Anlage nach Patentanspruch 13, dadurch gekenn¬ zeichnet, daß jede Vorrichtung zum induktiven Aufheizen (5, 8) separat steuerbare Heizstufen aufweist. 14. Plant according to claim 13, characterized gekenn¬ characterized in that each device for inductive heating (5, 8) has separately controllable heating levels.
15. Anlage nach Patentanspruch 11, gekennzeichnet durch eine zusätzliche Vorrichtung zur Einstellung des DurchlaufquerSchnitts zwischen den Rollen der Verformungseinrichtung (3) und den weiteren Walz¬ gerüsten (6, 7, 9), um den Durchlauf des am Kopf des Gießstranges sitzenden Anfahrstränges zu er¬ möglichen und um unmittelbar nach dem Durchlauf des Anfahrstranges den Durchlaufquerschnitt wieder auf die für die Verformungsvorgänge erforderlichen Werte zurückzuführen;15. Plant according to claim 11, characterized by an additional device for adjusting the flow cross-section between the rollers of the shaping device (3) and the further rolling stands (6, 7, 9) in order to ensure the passage of the starting strands located at the head of the casting strand ¬ possible and to return the flow cross-section to the values required for the deformation processes immediately after the run-through of the starting strand;
Vorrichtungen für die Steuerung der einzelnen Heiz¬ stufen der Vorrichtungen zum induktiven Aufheizen (5, 8) nacheinander zur jeweiligen Einschaltung unmittelbar nach dem Durchlauf des Anfahrstränges und durch den Einsatz der Trennvorrichtung (10) auch zum Abtrennen des Anfahrstranges vom Walzband (2*).Devices for the control of the individual heating stages of the devices for inductive heating (5, 8) one after the other for the respective switch-on immediately after the start-up strand has been run through and, by using the separating device (10), also for separating the start-up strand from the rolled strip (2 *).
16. Anlage nach Patentanspruch 8, gekennzeichnet durch die Verwendung der Trennvorrichtung (S) für das Abtrennen des Anfahrstranges. 16. Plant according to claim 8, characterized by the use of the separating device (S) for separating the starting strand.
PCT/DE1989/000332 1988-05-26 1989-05-23 Process for continuous production of steel strip or steel sheet from flat products made by the circular-arc type continuous casting process WO1989011363A1 (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
EP89906038A EP0415987B2 (en) 1988-05-26 1989-05-23 Process for continuous production of steel strip or steel sheet from flat products made by the circular-arc type continuous casting process
KR1019900700155A KR950014488B1 (en) 1988-05-26 1989-05-23 Method and device for continuously producing steel article by the continuous casting method
AT89906038T ATE83409T1 (en) 1988-05-26 1989-05-23 PROCESS FOR THE CONTINUOUS PRODUCTION OF STEEL STRIP OR SHEET FROM FLAT PRODUCTS MADE BY THE ARC CONTINUOUS CASTING PROCESS.
BR898907450A BR8907450A (en) 1988-05-26 1989-05-23 PROCESS AND INSTALLATION FOR THE CONTINUOUS PRODUCTION OF STEEL STRIPS OR STEEL PLATES ACCORDING TO THE CONTINUOUS LANGUAGE PROCESS
RO146356A RO108933B1 (en) 1988-05-26 1989-05-23 Process and installation for continuous process making of steel sheets and bands according to the continuous casting technology
DE8989906038T DE58903052D1 (en) 1988-05-26 1989-05-23 METHOD FOR THE CONTINUOUS PRODUCTION OF RIBBON STEEL OR STEEL SHEET FROM FLAT PRODUCTS PRODUCED BY THE ARCH CASTING METHOD.
FI904757A FI92161C (en) 1988-05-26 1990-09-27 Method and apparatus for continuous production of a steel strip or steel sheet
DK279290A DK171539B1 (en) 1988-05-26 1990-11-23 Method and plant for the continuous manufacture of strip steel or steel plate from flat products manufactured by the bowstring casting method
NO905088A NO176085C (en) 1988-05-26 1990-11-23 Method and apparatus for continuous manufacture of steel strip or steel plate according to the string casting method
BG93307A BG51443A3 (en) 1988-05-26 1990-11-26 Method and installation for continuous steel strip or steel plate making using the continuous casting method
SU904831837A RU2036030C1 (en) 1988-05-26 1990-11-26 Method for producing steel strip or sheet and a facility to implement it

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
IT20752/88A IT1224318B (en) 1988-05-26 1988-05-26 PROCESS AND PLANT FOR THE CONTINUOUS PRODUCTION OF STEEL BELT
IT20752A/88 1988-05-26
DEPCT/DE88/00629 1988-10-10
DE8800629 1988-10-10
DE3840812A DE3840812A1 (en) 1988-05-26 1988-11-30 METHOD AND SYSTEM FOR THE CONTINUOUS PRODUCTION OF STEEL STRIP OR STEEL SHEET BY THE CONTINUOUS CASTING PROCESS
DEP3840812.0 1988-11-30

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Publication Number Publication Date
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EP (1) EP0415987B2 (en)
KR (1) KR950014488B1 (en)
AU (1) AU624831B2 (en)
BG (1) BG51443A3 (en)
DE (2) DE3840812A1 (en)
DK (1) DK171539B1 (en)
FI (1) FI92161C (en)
IT (1) IT1224318B (en)
TR (1) TR25630A (en)
WO (1) WO1989011363A1 (en)
ZA (1) ZA893835B (en)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992000815A1 (en) * 1990-07-09 1992-01-23 Hoogovens Groep Bv Process and plant for obtaining steel strip coils having cold-rolled characteristics and directly obtained in a hot-rolling line
WO1992022389A1 (en) * 1991-06-18 1992-12-23 Mannesmann Ag Process and plant for obtaining steel strip coils having cold-rolled characteristics and directly obtained in a hot-rolling line
US5303766A (en) * 1991-03-22 1994-04-19 Hoogovens Groep B.V. Apparatus and method for the manufacture of hot-rolled steel
EP0611619A2 (en) * 1993-02-16 1994-08-24 DANIELI & C. OFFICINE MECCANICHE S.p.A. Mould for the continuous casting of thin slabs
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Publication number Priority date Publication date Assignee Title
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE942262C (en) * 1939-01-04 1956-05-03 Fritz Grah Dipl Ing Plant for the continuous casting of metal bars with downstream rolling devices
FR2011146A1 (en) * 1968-06-18 1970-02-27 Mannesmann Ag
DE1816868A1 (en) * 1968-12-24 1970-07-16 Demag Ag Furnace with heat reflectors - ature controlled casting rollers
GB1199805A (en) * 1967-04-20 1970-07-22 British Iron Steel Research Continuous Casting
GB2129723A (en) * 1982-11-11 1984-05-23 Mannesmann Ag Manufacture of metal strip

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE75978T1 (en) * 1987-04-13 1992-05-15 Thyssen Stahl Ag LINE FOR PRODUCTION OF A STEEL STRIP WITH A THICKNESS FROM 2 TO 25 MM.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE942262C (en) * 1939-01-04 1956-05-03 Fritz Grah Dipl Ing Plant for the continuous casting of metal bars with downstream rolling devices
GB1199805A (en) * 1967-04-20 1970-07-22 British Iron Steel Research Continuous Casting
FR2011146A1 (en) * 1968-06-18 1970-02-27 Mannesmann Ag
DE1816868A1 (en) * 1968-12-24 1970-07-16 Demag Ag Furnace with heat reflectors - ature controlled casting rollers
GB2129723A (en) * 1982-11-11 1984-05-23 Mannesmann Ag Manufacture of metal strip

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 10, Nr. 218 (M-506) (2274), 30. Juli 1986; & JP-A-61 056 708 (Sumitomo Metal Ind Ltd) 22. Marz 1986 *
PATENT ABSTRACTS OF JAPAN, Band 11, Nr. 6 (M-551) (2453), 8. Januar 1987; & JP-A-61 182 804 (Ishikawajima Harima Heavy Ind Co Ltd) 15. August 1986 *
PATENT ABSTRACTS OF JAPAN, Band 8, Nr. 20 (M-328) (1647), 26. September 1984; & JP-A-59 097 747 (Shin Nippon Seitetsu K.K.) 5. Juni 1984 *

Cited By (37)

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WO1992000815A1 (en) * 1990-07-09 1992-01-23 Hoogovens Groep Bv Process and plant for obtaining steel strip coils having cold-rolled characteristics and directly obtained in a hot-rolling line
US5329688A (en) * 1990-07-09 1994-07-19 Giovanni Arvedi Process and plant for obtaining steel strip coils having cold-rolled characteristics and directly obtained in a hot-rolling line
US5303766A (en) * 1991-03-22 1994-04-19 Hoogovens Groep B.V. Apparatus and method for the manufacture of hot-rolled steel
WO1992022389A1 (en) * 1991-06-18 1992-12-23 Mannesmann Ag Process and plant for obtaining steel strip coils having cold-rolled characteristics and directly obtained in a hot-rolling line
EP0853987A2 (en) * 1993-02-16 1998-07-22 VOEST-ALPINE Industrieanlagenbau GmbH Plant for the production of a strip, a pre-strip or a stab
US5460220A (en) * 1993-02-16 1995-10-24 Danieli & C. Officine Meccaniche Spa Method of and mold for the continuous casting of thin slabs
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US5528816A (en) * 1994-03-31 1996-06-25 Danieli & C. Officine Meccaniche Spa Method and plant to produce strip, starting from thin slabs
US5901777A (en) * 1994-04-04 1999-05-11 Nippon Steel Corporation Twin-roll continuous casting method
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EP0771596A1 (en) * 1995-11-03 1997-05-07 Sms Schloemann-Siemag Aktiengesellschaft Installation for rolling hot strip by continuous or discontinuous rolling
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CN1103647C (en) * 1996-03-28 2003-03-26 曼内斯曼股份公司 Method and arrangement for producing hot-rolled strip
US5943894A (en) * 1996-11-05 1999-08-31 Sms Schloemann-Siemag Aktiengesellschaft Method of rolling plates
EP1662011A1 (en) * 2004-11-24 2006-05-31 ARVEDI, Giovanni Hot rolled two-phase steel strip having features of a cold rolled strip
US8601851B2 (en) 2005-10-31 2013-12-10 Sms Siemag Aktiengesellschaft Method and finishing train for hot-rolling starting material
WO2007051521A3 (en) * 2005-10-31 2008-05-22 Sms Demag Ag Method and finishing train for hot-rolling starting material
KR101358634B1 (en) 2005-11-09 2014-02-04 지멘스 브이에이아이 메탈스 테크놀로지스 게엠베하 Method for producing a hot-rolled steel strip and combined casting and rolling installation for carrying out the method
AU2006312735B2 (en) * 2005-11-09 2011-06-02 Siemens Vai Metals Technologies Gmbh Method for producing a hot-rolled steel strip and combined casting and rolling installation for carrying out the method
US8479550B2 (en) 2005-11-09 2013-07-09 Siemens Vai Metals Technologies Gmbh Method for the production of hot-rolled steel strip and combined casting and rolling plant for carrying out the method
WO2007054237A1 (en) * 2005-11-09 2007-05-18 Siemens Vai Metals Technologies Gmbh & Co Method for producing a hot-rolled steel strip and combined casting and rolling installation for carrying out the method
WO2010121763A1 (en) 2009-04-23 2010-10-28 Sms Siemag Ag Process and apparatus for the continuous casting of a slab
RU2493925C2 (en) * 2009-04-23 2013-09-27 Смс Зимаг Аг Method and device for continuous slab forming
DE102009018683A1 (en) 2009-04-23 2010-10-28 Sms Siemag Ag Method and device for continuous casting of a slab
EP3175934B1 (en) 2010-05-10 2021-06-30 Danieli & C. Officine Meccaniche SpA Rolling method in a rolling plant for the production of flat rolled products
EP3175933B1 (en) 2010-05-10 2021-06-30 Danieli & C. Officine Meccaniche SpA Rolling method in a rolling plant for the production of flat rolled products
RU2548355C2 (en) * 2010-06-22 2015-04-20 ДАНИЕЛИ энд К. ОФФИЧИНЕ МЕККАНИКЕ СПА Production of long-sized metal rolled stock and continuous foundry-rolling plant to this end
DE102015223787A1 (en) 2015-10-09 2017-04-13 Sms Group Gmbh Method and device for producing a metallic strip by endless rolling
US20220002829A1 (en) * 2018-11-14 2022-01-06 Nippon Steel Corporation Apparatus for manufacturing thin steel sheet and method for manufacturing thin steel sheet

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FI92161B (en) 1994-06-30
AU624831B2 (en) 1992-06-25
DK171539B1 (en) 1996-12-30
FI904757A0 (en) 1990-09-27
BG51443A3 (en) 1993-05-14
EP0415987B1 (en) 1992-12-16
DE3840812A1 (en) 1990-04-05
IT1224318B (en) 1990-10-04
IT8820752A0 (en) 1988-05-26
ZA893835B (en) 1990-02-28
KR900701437A (en) 1990-12-03
FI92161C (en) 1994-10-10
AU3686289A (en) 1989-12-12
DK279290A (en) 1990-11-23
KR950014488B1 (en) 1995-12-02
DK279290D0 (en) 1990-11-23
TR25630A (en) 1993-05-03
EP0415987A1 (en) 1991-03-13
DE58903052D1 (en) 1993-01-28
EP0415987B2 (en) 1999-11-24

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