WO1999058263A1 - System and method for producing steel strip - Google Patents

System and method for producing steel strip Download PDF

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Publication number
WO1999058263A1
WO1999058263A1 PCT/EP1999/003058 EP9903058W WO9958263A1 WO 1999058263 A1 WO1999058263 A1 WO 1999058263A1 EP 9903058 W EP9903058 W EP 9903058W WO 9958263 A1 WO9958263 A1 WO 9958263A1
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WO
WIPO (PCT)
Prior art keywords
strip
hot
hot rolling
casting
steel strip
Prior art date
Application number
PCT/EP1999/003058
Other languages
German (de)
French (fr)
Inventor
Ernst-Reinhard Oberhaus
Original Assignee
Abb Patent Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Abb Patent Gmbh filed Critical Abb Patent Gmbh
Priority to AU38273/99A priority Critical patent/AU3827399A/en
Publication of WO1999058263A1 publication Critical patent/WO1999058263A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • 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
    • B21B1/28—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 cold-rolling, e.g. Steckel cold mill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B15/0085—Joining ends of material to continuous strip, bar or sheet
    • 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
    • B21B2001/228—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 skin pass rolling or temper 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
    • B21B1/38—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 sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
    • B21B2001/383—Cladded or coated products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B15/0007—Cutting or shearing the product
    • B21B2015/0021—Cutting or shearing the product in the rolling direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B2015/0071—Levelling the rolled product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/04—Ferritic rolling
    • 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
    • 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
    • B21B45/04—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 for de-scaling, e.g. by brushing
    • B21B45/06—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 for de-scaling, e.g. by brushing of strip material

Definitions

  • the invention relates to an arrangement and to a method for producing steel strip according to the preambles of claims 1 and 8.
  • DE 195 05 324 C2 discloses a process for producing cold-rolled steel strips in a continuous strip treatment line and consequently without intermediate storage of coils within this strip treatment line, after which hot strip is processed in one pass to the desired cold-rolled end product.
  • This known method integrates cold forming in the strip treatment line and ensures the production of steel strips, in particular stainless steel strips, with the properties required in terms of flatness, cleanliness, surface roughness and gloss in a continuous strip treatment process, but using hot strip as the starting material, which is in a separate process was produced and temporarily stored in coils.
  • the invention has for its object to provide an arrangement and a method for producing steel strip of the type mentioned, in which or in which the conventional production method strip casting or thin slab casting with hot rolling - cold rolling - finishing in terms of economy and material throughput optimized and steel strip from desired, possibly different quality can be produced.
  • the advantages that can be achieved with the invention are, in particular, that the production of the hot strip and the subsequent strip treatment process are combined in the sense of overall integration into a single process in a single installation. All known processes and plants with the aim of improving the production process for steel strip assume a separation of the process sequence and the plant after the production of the hot strip - be it by strip casting or thin slab casting with hot rolling.
  • the overall integration proposed according to the invention has cost advantages because, for example, the reeling group of a conventional hot strip system, the material supply to a conventional strip treatment system with a decoiling group and the necessary transport of the coils from one system to the other are saved. A continuous overall process is realized, which only has to be interrupted at relatively large time intervals for maintenance purposes and for the replacement of wearing parts.
  • Another advantage of the overall integration is the strip guidance in the outlet of a conventional hot strip mill and when threading into a conventional strip treatment line.
  • the overall integration eliminates the critical phases during threading and unthreading the steel strip of the individual coils.
  • a comparable critical phase occurs with the overall integration only when the entire system is started up.
  • the start-up can also be carried out at a reduced speed, the casting speed of the strip casting machine being correspondingly continuously changed.
  • the hot rolling of steel strips in the very small thickness range of 1 mm is advantageously achievable, since the problematic strip guidance of such a thin strip is decisively simplified as a result of the integration of the subsequent strip treatment processes.
  • the temperature control during and after hot rolling play a decisive role for the material properties create the steel belt.
  • the method according to the invention is also advantageous in this point, since the desired temperature control in this regard can optionally be implemented by heating and / or cooling.
  • FIG. 1 shows a first embodiment of a system for producing steel strip
  • Fig. 3 shows a third embodiment of a plant for producing steel strip.
  • a belt casting machine 1 a produces casting belt of the desired thickness (for example in the range from 1 to 8 mm), which is fed to a belt store 3 via a roller table with a cooling section 2.
  • the capacity of the strip store 3 is dimensioned such that, with unchanged casting speed, at least that amount of hot strip B can be stored which, during the welding together (see welding machine 6) of the end of an “old” hot strip positioned in the welding machine at the end of production, with the beginning of a “ new "hot strip produced at the start of production is produced by the strip casting machine.
  • the hot strip B can be scooped after the strip storage 3 with the aid of scissors 4 or divided if necessary.
  • a reel 5 arranged after the scissors 4 enables the hot strip to be wound up if necessary, which should not go through the process sequence provided for by the scissors 4. Furthermore, the reel 5 serves the purpose of picking up the hot strip produced from the upstream system section in the event of a fault in the system section downstream of the scissors 4.
  • the hot strip after the scissors 4 passes through a welding machine 6, in which, if necessary, a “new” hot strip after scooping with the “al can be welded together.
  • the welding machine 6 is followed by strip treatment devices 7 which straighten and / or clean and / or pickle and / or anneal and / or reduce by cold forming and / or coating and / or skin-dressing and / or trimming the hot strip B.
  • a reel 8 arranged at the end of the system winds up the finished steel strip.
  • FIG. 2 shows a second embodiment of a system for producing steel strip, in which the overall integration of hot strip production - strip treatment takes place directly without a strip store and welding machine.
  • This embodiment is suitable for system speeds above 100 m / min.
  • a thin slab caster 1b produces casting tape of the desired thickness, which is fed through a compensating furnace 9 to a hot-forming device, i. H.
  • Hot rolling stands 10 arrives, in which the hot strip is reduced according to the requirements (for example to hot strip thicknesses below 1 mm).
  • the material properties are influenced in the desired sense, for example by rolling in the ferrite area in such a way that the subsequent processes, such as cold forming, can be carried out with reduced effort.
  • the hot strip B After rolling, the hot strip B arrives in a device 11 for temperature control by heating and / or cooling during a predetermined temperature / time cycle for targeted temperature control and thus for setting desired material properties. At the optimum strip temperature, the steel strip then runs through a straightening unit 13 into a pickling device 14.
  • strip treatment devices 15 Downstream of the pickling device 14 are strip treatment devices 15 which carry out a reduction (cold forming) and / or skin passaging and trimming.
  • a pair of scissors 16 follows. Reels 17, 18 arranged at the end of the system alternately wind up the finished steel strip.
  • FIG. 3 shows a third embodiment of a system for producing steel strip.
  • This system essentially represents a combination of the above-described embodiments according to FIGS. 1 and 2.
  • the third embodiment corresponds to the first embodiment described above, according to which, after the strip store 3, scissors 4, if necessary, reel 5, welding machine 6 and strip treatment devices 7 follow, which straighten and / or clean and / or pickle and / or anneal and / or reduce by cold working and / or coating and / or skin-dressing and / or trimming the steel strip.
  • a pair of scissors 16 follows. Reels 17, 18 arranged at the end of the system alternately wind up the finished steel strip.
  • the belt store 3 is particularly advantageous when the downstream belt treatment device 7 does not allow threading under operating conditions (for example in the case of large vertical furnaces).
  • the start-up - depending on the level of the optimal process speed - must be carried out at a reduced speed to ensure that the threading process of the slab casting machine 1 b - hot rolling mill stands 10 - strip storage 3 - welding machine 6 runs smoothly.
  • This initially means a reduced casting speed, which is then increased after welding the "old" and "new" strip together with the entire system to the desired working speed during continuous operation.
  • the welding machine can be arranged with upstream scissors in front of the hot rolling stands 10 in order to enable the strips to be welded together at the start of production.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)

Abstract

The invention relates to a method for producing steel strip using a strip casting machine (1a) or thin slab casting system (1b) connected to hot-rolling stands (10). Strip-processing devices (7, 13, 14, 15) are positioned downstream of the strip casting machine (1a) or thin slab casting system (1b) connected to hot-rolling stands (10). These devices carry out stretch levelling and/or cleaning and/or pickling and/or annealing and/or reduction by cold forming and/or coating and/or skin pass rolling and/or trimming. The invention also relates to a method for producing steel strip by strip casting or thin slab casting in connection with hot rolls. According to said method the method for producing the hot-rolled strip is combined with strip-processing methods, especially stretch levelling and/or cleaning and/or pickling and/or annealing and/or reduction by cold forming and/or coating and/or skin pass rolling and/or trimming, to yield a continuous global method.

Description

Anordnung und Verfahren zum Erzeugen von Stahlband Arrangement and method for producing steel strip
Beschreibungdescription
Die Erfindung bezieht sich auf eine Anordnung und auf ein Verfahren zum Erzeugen von Stahlband gemäß den Oberbegriffen der Ansprüche 1 und 8.The invention relates to an arrangement and to a method for producing steel strip according to the preambles of claims 1 and 8.
Aus der DE 195 05 324 C2 ist ein Verfahren zum Herstellen von kaltgewalzten Stahlbändern in einer kontinuierlichen Bandbehandlungslinie und folglich ohne Zwischenlagerungen von Coils innerhalb dieser Bandbehandlungslinie bekannt, wonach Warmband in einem Durchlauf zum gewünschten kaltgewalzten Endprodukt verarbeitet wird.DE 195 05 324 C2 discloses a process for producing cold-rolled steel strips in a continuous strip treatment line and consequently without intermediate storage of coils within this strip treatment line, after which hot strip is processed in one pass to the desired cold-rolled end product.
Dieses bekannte Verfahren integriert die Kaltverformung in die Bandbehandlungslinie und gewährleistet die Herstellung von Stahlbändern, insbesondere Edelstahlbändern, mit in Bezug auf Planheit, Sauberkeit, Oberflächenrauhigkeit und Glanz verlangten Eigenschaften in einem kontinuierlichen Bandbehandlungsprozeß, wobei jedoch als Ausgangsmaterial Warmband dient, das in einem hiervon getrennten Prozeß produziert und in Coils zwischengelagert wurde.This known method integrates cold forming in the strip treatment line and ensures the production of steel strips, in particular stainless steel strips, with the properties required in terms of flatness, cleanliness, surface roughness and gloss in a continuous strip treatment process, but using hot strip as the starting material, which is in a separate process was produced and temporarily stored in coils.
Der Erfindung liegt die Aufgabe zugrunde, eine Anordnung und ein Verfahren zum Erzeugen von Stahlband der eingangs genannten Art anzugeben, bei der bzw. bei dem die konventionelle Produktionsweise Bandgießen oder Dünnbrammengießen mit Warmwalzen - Kaltwalzen - Veredeln in Bezug auf Wirtschaftlichkeit und Materialdurchsatz optimiert und Stahlband von gewünschter, gegebenenfalls unterschiedlicher Qualität produzierbar ist.The invention has for its object to provide an arrangement and a method for producing steel strip of the type mentioned, in which or in which the conventional production method strip casting or thin slab casting with hot rolling - cold rolling - finishing in terms of economy and material throughput optimized and steel strip from desired, possibly different quality can be produced.
Diese Aufgabe wird hinsichtlich der Anordnung in Verbindung mit den Merkmalen des Oberbegriffes erfindungsgemäß durch die im Kennzeichen des Anspruchs 1 angegebenen Merkmale gelöst. Diese Aufgabe wird hinsichtlich des Verfahrens in Verbindung mit den Merkmalen desThis object is achieved with regard to the arrangement in connection with the features of the preamble according to the invention by the features specified in the characterizing part of claim 1. This task is carried out with regard to the method in connection with the features of
Oberbegriffes erfindungsgemäß durch die im Kennzeichen des Anspruchs 8 angegebenen Merkmale gelöst.Preamble according to the invention solved by the features specified in the characterizing part of claim 8.
Die mit der Erfindung erzielbaren Vorteile bestehen insbesondere darin, daß die Erzeugung des Warmbandes und der sich anschließende Bandbehandlungsprozeß im Sinne einer Gesamtintegration zu einem einzigen Prozeß in einer einzigen Anlage zusammengefaßt sind. Alle bekannten Verfahren und Anlagen mit dem Ziel, den Produktionsprozeß für Stahlband zu verbessern, gehen von einer Trennung des Prozeßablaufes und der Anlage nach der Erzeugung des Warmbandes - sei es durch Bandgießen oder Dünnbrammengießen mit Warmwalzen - aus. Die erfindungsgemäß vorgeschlagene Gesamtintegration hat Kostenvorteile, denn es werden beispielsweise die Aufhaspelgruppe einer konventionellen Warmbandanlage, die Materialversorgung einer konventionellen Bandbehandlungsanlage mit einer Abhaspelgruppe und der notwendige Transport der Coils von der einen zur anderen Anlage eingespart. Es wird ein kontinuierlicher Gesamtprozeß realisiert, der nur in relativ großen Zeitintervallen zu Wartungszwecken und zum Austausch von Verschleißteilen unterbrochen werden muß.The advantages that can be achieved with the invention are, in particular, that the production of the hot strip and the subsequent strip treatment process are combined in the sense of overall integration into a single process in a single installation. All known processes and plants with the aim of improving the production process for steel strip assume a separation of the process sequence and the plant after the production of the hot strip - be it by strip casting or thin slab casting with hot rolling. The overall integration proposed according to the invention has cost advantages because, for example, the reeling group of a conventional hot strip system, the material supply to a conventional strip treatment system with a decoiling group and the necessary transport of the coils from one system to the other are saved. A continuous overall process is realized, which only has to be interrupted at relatively large time intervals for maintenance purposes and for the replacement of wearing parts.
Ein weiterer Vorteil der Gesamtintegration ergibt sich in Bezug auf die Bandführung im Auslauf einer konventionellen Warmbandstraße und beim Einfädeln in eine konventionelle Bandbehandlungslinie. Bei der Gesamtintegration entfallen die kritischen Phasen während des Ein- und Ausfädeln des Stahlbandes der einzelnen Coils. Eine vergleichbar kritische Phase entsteht bei der Gesamtintegration nur beim Anfahren der Gesamtanlage. Zur Erhöhung der Sicherheit kann das Anfahren auch mit verringerter Geschwindigkeit erfolgen, wobei die Gießgeschwindigkeit der Bandgießmaschine entsprechend kontinuierlich verändert wird.Another advantage of the overall integration is the strip guidance in the outlet of a conventional hot strip mill and when threading into a conventional strip treatment line. The overall integration eliminates the critical phases during threading and unthreading the steel strip of the individual coils. A comparable critical phase occurs with the overall integration only when the entire system is started up. To increase safety, the start-up can also be carried out at a reduced speed, the casting speed of the strip casting machine being correspondingly continuously changed.
Vorteilhaft wird das Warmwalzen von Stahlbändern im sehr kleinen Dickenbereich von 1 mm realisierbar, da infolge der Integration der nachfolgenden Bandbehandlungsprozesse die problematische Bandführung eines solch dünnen Bandes entscheidend erleichtert wird. Die Temperaturführung beim und nach dem Warmwalzen spielen neben der Stahlzusammensetzung eine entscheidende Rolle für die späteren Materialeigen- schaffen des Stahlbandes. Auch in diesem Punkt ist das erfindungsgemäße Verfahren vorteilhaft, da diesbezüglich gewünschte Temperaturführungen wahlweise durch Heizen und/oder Kühlen realisiert werden können.The hot rolling of steel strips in the very small thickness range of 1 mm is advantageously achievable, since the problematic strip guidance of such a thin strip is decisively simplified as a result of the integration of the subsequent strip treatment processes. In addition to the steel composition, the temperature control during and after hot rolling play a decisive role for the material properties create the steel belt. The method according to the invention is also advantageous in this point, since the desired temperature control in this regard can optionally be implemented by heating and / or cooling.
Die Erfindung wird nachstehend anhand der in der Zeichnung dargestellten Ausführungsbeispiele erläutert. Es zeigen:The invention is explained below with reference to the embodiments shown in the drawing. Show it:
Fig. 1 eine erste Ausführungsform einer Anlage zum Erzeugen von Stahlband,1 shows a first embodiment of a system for producing steel strip,
Fig. 2 eine zweite Ausführungsform einer Anlage zum Erzeugen von Stahlband,2 shows a second embodiment of a system for producing steel strip,
Fig. 3 eine dritte Ausführungsform einer Anlage zum Erzeugen von Stahlband.Fig. 3 shows a third embodiment of a plant for producing steel strip.
In Fig. 1 ist eine erste Ausführungsform einer Anlage zum Erzeugen von Stahlband dargestellt. Diese Ausführungsform ist für Anlagengeschwindigkeiten bis ungefähr 100 m/min geeignet. Eine Bandgießmaschine 1 a erzeugt Gießband von gewünschter Dicke (beispielsweise im Bereich von 1 bis 8 mm), das über einen Rollgang mit einer Kühlstrecke 2 einem Bandspeicher 3 zugeführt wird. Die Kapazität des Bandspeichers 3 ist derart bemessen, daß bei unveränderter Gießschwindigkeit zumindest diejenige Menge Warmband B gespeichert werden kann, die während des Zusammenschweißens (siehe Schweißmaschine 6) des Endes eines „alten", bei Produktionsende in der Schweißmaschine positionierten Warmbandes mit dem Anfang eines „neuen", bei Produktionsbeginn hergestellten Warmbandes, von der Bandgießmaschine produziert wird.1 shows a first embodiment of a system for producing steel strip. This embodiment is suitable for system speeds of up to approximately 100 m / min. A belt casting machine 1 a produces casting belt of the desired thickness (for example in the range from 1 to 8 mm), which is fed to a belt store 3 via a roller table with a cooling section 2. The capacity of the strip store 3 is dimensioned such that, with unchanged casting speed, at least that amount of hot strip B can be stored which, during the welding together (see welding machine 6) of the end of an “old” hot strip positioned in the welding machine at the end of production, with the beginning of a “ new "hot strip produced at the start of production is produced by the strip casting machine.
Das Warmband B kann nach dem Bandspeicher 3 mit Hilfe einer Schere 4 geschöpft oder bei Bedarf geteilt werden. Eine nach der Schere 4 angeordnete Aufhaspel 5 ermöglicht die bedarfsweise Aufwicklung von Warmband, welches den nach der Schere 4 vorgesehenen Prozeßablauf nicht durchlaufen soll. Des weiteren dient die Aufhaspel 5 dem Zweck, bei einer Störung in dem der Schere 4 nachgeschalteten Anlagenteil das produzierte Warmband aus dem vorgeschalteten Anlagenteil aufzunehmen.The hot strip B can be scooped after the strip storage 3 with the aid of scissors 4 or divided if necessary. A reel 5 arranged after the scissors 4 enables the hot strip to be wound up if necessary, which should not go through the process sequence provided for by the scissors 4. Furthermore, the reel 5 serves the purpose of picking up the hot strip produced from the upstream system section in the event of a fault in the system section downstream of the scissors 4.
Im normalen Betrieb durchläuft das Warmband nach der Schere 4 eine Schweißmaschine 6, in der bedarfsweise ein „neues" Warmband nach dem Schöpfen mit dem „al- ten" Band zusammengeschweißt werden kann. Der Schweißmaschine 6 nachgeordnet sind Bandbehandlungseinrichtungen 7, die ein Streckrichten und/oder Reinigen und/oder Beizen und/oder Glühen und/oder Reduzieren durch Kaltverformen und/oder Beschichten und/oder Dressieren und/oder Besäumen des Warmbandes B durchführen. Eine am Ende der Anlage angeordnete Aufhaspel 8 wickelt das fertiggestellte Stahlband auf.In normal operation, the hot strip after the scissors 4 passes through a welding machine 6, in which, if necessary, a “new” hot strip after scooping with the “al can be welded together. The welding machine 6 is followed by strip treatment devices 7 which straighten and / or clean and / or pickle and / or anneal and / or reduce by cold forming and / or coating and / or skin-dressing and / or trimming the hot strip B. A reel 8 arranged at the end of the system winds up the finished steel strip.
In Fig. 2 ist eine zweite Ausführungsform einer Anlage zum Erzeugen von Stahlband dargestellt, bei der die Gesamtintegration Warmbanderzeugung - Bandbehandlung direkt ohne Bandspeicher und Schweißmaschine erfolgt. Diese Ausführungsform ist für Anlagengeschwindigkeiten über 100 m/min geeignet. Eine Dunnbrammengießanlage 1b erzeugt Gießband von gewünschter Dicke, das durch einen Ausgleichsofen 9 zu einer Warmverformungsvorrichtung, d. h. Warmwalzgerusten 10 gelangt, in denen das Warmband entsprechend den Erfordernissen reduziert wird (beispielsweise auf Warmbanddicken unter 1 mm). Beim und nach dem Warmwalzen werden die Materialeigenschaften im gewünschten Sinn beeinflußt, beispielsweise durch Walzen im Ferritbereich derart, daß die nachfolgenden Prozesse, wie beispielsweise die Kaltverformung, mit reduziertem Aufwand durchgeführt werden können.FIG. 2 shows a second embodiment of a system for producing steel strip, in which the overall integration of hot strip production - strip treatment takes place directly without a strip store and welding machine. This embodiment is suitable for system speeds above 100 m / min. A thin slab caster 1b produces casting tape of the desired thickness, which is fed through a compensating furnace 9 to a hot-forming device, i. H. Hot rolling stands 10 arrives, in which the hot strip is reduced according to the requirements (for example to hot strip thicknesses below 1 mm). During and after hot rolling, the material properties are influenced in the desired sense, for example by rolling in the ferrite area in such a way that the subsequent processes, such as cold forming, can be carried out with reduced effort.
Das Warmband B gelangt nach dem Walzen zur gezielten Temperaturführung und damit zur Einstellung gewünschter Materialeigenschaften in eine Einrichtung 11 zur Temperaturführung durch Heizen und/oder Kühlen während eines vorgegebenen Tempe- ratur/Zeit-Zyklusses. Mit der optimalen Bandtemperatur läuft das Stahlband anschließend durch eine Streckrichteinheit 13 in eine Beizeinrichtung 14.After rolling, the hot strip B arrives in a device 11 for temperature control by heating and / or cooling during a predetermined temperature / time cycle for targeted temperature control and thus for setting desired material properties. At the optimum strip temperature, the steel strip then runs through a straightening unit 13 into a pickling device 14.
Der Beizeinrichtung 14 nachgeordnet sind Bandbehandlungseinrichtungen 15, die ein Reduzieren (Kaltverformen) und/oder Dressieren sowie Besäumen durchführen. Es schließt sich eine Schere 16 an. Am Ende der Anlage angeordnete Aufhaspeln 17, 18 wickeln abwechselnd das fertiggestellte Stahlband auf.Downstream of the pickling device 14 are strip treatment devices 15 which carry out a reduction (cold forming) and / or skin passaging and trimming. A pair of scissors 16 follows. Reels 17, 18 arranged at the end of the system alternately wind up the finished steel strip.
In Fig. 3 ist eine dritte Ausführungsform einer Anlage zum Erzeugen von Stahlband dargestellt. Diese Anlage stellt im wesentlichen eine Kombination der vorstehend beschriebenen Ausführungsformen nach den Fig. 1 und 2 dar. In ihrem ersten Abschnitt entspricht die dritte Ausführungsform der vorstehend beschriebenen zweiten Ausführungsform mit Bandgießmaschine 1b, Ausgleichsofen 9, Warmwalzgerusten 10 und Einrichtung 11 zur Temperaturführung. In ihrem zweiten Abschnitt entspricht die dritte Ausführungsform der vorstehend beschriebenen ersten Ausführungsform, wonach sich nach dem Bandspeicher 3, Schere 4, bedarfsweise Aufhaspel 5, Schweißmaschine 6 und Bandbehandlungseinrichtungen 7 anschließen, welche ein Streckrichten und/oder Reinigen und/oder Beizen und/oder Glühen und/oder Reduzieren durch Kaltverformen und/oder Beschichten und/oder Dressieren und/oder Besäumen des Stahlbandes durchführen. Es folgt eine Schere 16. Am Ende der Anlage angeordnete Aufhaspeln 17, 18 wickeln abwechselnd das fertiggestellte Stahlband auf.3 shows a third embodiment of a system for producing steel strip. This system essentially represents a combination of the above-described embodiments according to FIGS. 1 and 2. In its first section corresponds to the third embodiment of the above-described second embodiment with belt casting machine 1b, compensating furnace 9, hot rolling stands 10 and device 11 for temperature control. In its second section, the third embodiment corresponds to the first embodiment described above, according to which, after the strip store 3, scissors 4, if necessary, reel 5, welding machine 6 and strip treatment devices 7 follow, which straighten and / or clean and / or pickle and / or anneal and / or reduce by cold working and / or coating and / or skin-dressing and / or trimming the steel strip. A pair of scissors 16 follows. Reels 17, 18 arranged at the end of the system alternately wind up the finished steel strip.
Der Bandspeicher 3 ist insbesondere dann vorteilhaft, wenn die nachgeschaltete Bandbehandlungseinrichtung 7 ein Einfädeln unter Betriebsbedingungen nicht erlaubt ( beispielsweise bei großen Vertikalöfen). Bei einer solchen Anlage muß das Anfahren - je nach Höhe der optimalen Prozeßgeschwindigkeit - mit einer reduzierten Geschwindigkeit erfolgen, um sicherzustellen, daß der Einfädelvorgang Dunnbrammengießanlage 1 b - Warmwalzgerüste 10 - Bandspeicher 3 - Schweißmaschine 6 störungsfrei verläuft. Dies bedeutet zunächst eine reduzierte Gießgeschwindigkeit, die dann nach dem Zusammenschweißen von „altem" und „neuem" Band während des kontinuierlichen Betriebes zusammen mit der Gesamtanlage auf die gewünschte Arbeitsgeschwindigkeit erhöht wird.The belt store 3 is particularly advantageous when the downstream belt treatment device 7 does not allow threading under operating conditions (for example in the case of large vertical furnaces). In such a system, the start-up - depending on the level of the optimal process speed - must be carried out at a reduced speed to ensure that the threading process of the slab casting machine 1 b - hot rolling mill stands 10 - strip storage 3 - welding machine 6 runs smoothly. This initially means a reduced casting speed, which is then increased after welding the "old" and "new" strip together with the entire system to the desired working speed during continuous operation.
Alternativ kann die Schweißmaschine mit vorgeordneter Schere vor den Warmwalzgerusten 10 angeordnet sein, um das Zusammenschweißen der Bänder bei Produktionsbeginn zu ermöglichen. Alternatively, the welding machine can be arranged with upstream scissors in front of the hot rolling stands 10 in order to enable the strips to be welded together at the start of production.

Claims

Patentansprüche claims
1. Anordnung zum Erzeugen von Stahlband unter Verwendung einer Bandgießmaschine (1a) oder einer Dunnbrammengießanlage (1 b) in Verbindung mit Warmwalzgerusten (10), dadurch gekennzeichnet, daß der Bandgießmaschine (1 a, 1 b) oder der Dunnbrammengießanlage (1 b) in Verbindung mit Warmwalzgerusten (10) Bandbehandlungseinrichtungen (7, 13, 14, 15) nachgeordnet sind, welche ein Streckrichten und/oder Reinigen und/oder Beizen und/oder Glühen und/oder Reduzieren durch Kaltverformen und/oder Beschichten und/oder Dressieren und/oder Besäumen bewirken.1. Arrangement for producing steel strip using a strip casting machine (1a) or a thin slab casting plant (1 b) in conjunction with hot rolling stands (10), characterized in that the strip casting machine (1 a, 1 b) or the thin slab casting plant (1 b) in Connection with hot rolling stands (10) are arranged downstream of strip treatment devices (7, 13, 14, 15) which straighten and / or clean and / or pickle and / or anneal and / or reduce by cold forming and / or coating and / or skin-dressing and / or trimming.
2. Anordnung nach Anspruch 1 , dadurch gekennzeichnet, daß zwischen der Bandgießmaschine (1 a) oder der Dunnbrammengießanlage (1 b) in Verbindung mit Warmwalzgerusten (10) und den Bandbehandlungseinrichtungen (7) ein Bandspeicher (3) angeordnet ist.2. Arrangement according to claim 1, characterized in that between the strip casting machine (1 a) or the thin slab casting plant (1 b) in conjunction with hot rolling stands (10) and the strip treatment devices (7), a strip store (3) is arranged.
3. Anordnung nach Anspruch 1 und/oder 2, dadurch gekennzeichnet, daß zwischen Bandgießmaschine (1 a) oder der Dunnbrammengießanlage (1 b) in Verbindung mit Warmwalzgerusten (10) und den Bandbehandlungseinrichtungen (7) eine Schweißmaschine (6) angeordnet ist.3. Arrangement according to claim 1 and / or 2, characterized in that a welding machine (6) is arranged between the strip casting machine (1 a) or the thin slab casting plant (1 b) in connection with hot rolling stands (10) and the strip treatment devices (7).
4. Anordnung nach Anspruch 1 und/oder 2, dadurch gekennzeichnet daß eine Schweißmaschine vor den Warmwalzgerusten (10) angeordnet ist.4. Arrangement according to claim 1 and / or 2, characterized in that a welding machine is arranged in front of the hot rolling stands (10).
5. Anordnung nach Anspruch 3 und/oder 4, dadurch gekennzeichnet, daß eine Schere (4) vor der Schweißmaschine (6) angeordnet ist.5. Arrangement according to claim 3 and / or 4, characterized in that a pair of scissors (4) is arranged in front of the welding machine (6).
6. Anordnung nach Anspruch 5, dadurch gekennzeichnet, daß eine Aufhaspel (5) zwischen Schere (4) und Schweißmaschine (6) angeordnet ist. 6. Arrangement according to claim 5, characterized in that a reel (5) between the scissors (4) and welding machine (6) is arranged.
7. Anordnung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß eine Einrichtung (11 ) zur Temperaturführung des Warmbandes durch Heizen und/oder Kühlen nach den Warmwalzgerusten (10) angeordnet ist.7. Arrangement according to one of claims 1 to 6, characterized in that a device (11) for temperature control of the hot strip by heating and / or cooling after the hot rolling stands (10) is arranged.
8. Verfahren zum Erzeugen von Stahlband mittels Bandgießen oder Dünnbrammengießen in Verbindung mit Warmwalzen, dadurch gekennzeichnet, daß das Produktionsverfahren zum Erzeugen des Warmbandes mit Bandbehandlungsverfahren wie insbesondere Streckrichten und/oder Reinigen und/oder Beizen und/oder Glühen und/oder Reduzieren durch Kaltverformen und/oder Beschichten und/oder Dressieren und/oder Besäumen zu einem kontinuierlichen Gesamtverfahren verbunden wird.8. A method for producing steel strip by means of strip casting or thin slab casting in connection with hot rolling, characterized in that the production method for producing the hot strip with strip treatment processes such as stretch straightening and / or cleaning and / or pickling and / or annealing and / or reducing by cold forming and / or coating and / or skin-dressing and / or trimming is combined to form a continuous overall process.
9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, daß ein bei Produktionsbeginn hergestelltes Stahlband mit einem bei Produktionsende an der Schweißmaschine positionierten Stahlband verschweißt wird, wobei das während des Verschweißens der Stahlbänder produzierte Stahlband von einem Bandspeicher (3) aufgenommen wird.9. The method according to claim 8, characterized in that a steel strip produced at the start of production is welded to a steel strip positioned at the end of production on the welding machine, the steel strip produced during the welding of the steel strips being received by a strip store (3).
10. Verfahren nach Anspruch 8, dadurch gekennzeichnet, daß die Produktion mit verminderter Gießgeschwindigkeit angefahren wird und erst nach dem Verschweißen eines bei Produktionsbeginn hergestellten Stahlbandes mit einem bei Produktionsende an der Schweißmaschine positionierten Stahlband auf die gewünschte Anlagengeschwindigkeit erhöht wird.10. The method according to claim 8, characterized in that the production is started at a reduced casting speed and is increased to the desired system speed only after welding a steel strip produced at the start of production with a steel strip positioned at the end of production at the welding machine.
11. Verfahren nach einem der Ansprüche 8 bis 10, dadurch gekennzeichnet, daß das Warmband nach dem Warmwalzen zur gezielten Wärmebehandlung durch einen vorgegebenen Temperatur/Zeit-Zyklus zunächst gekühlt und/oder aufgeheizt und anschließend während eines vorgegebenen Zeitraumes auf einer derart eingestellten Temperatur konstant gehalten wird, um schließlich auf eine gewünschte Endtemperatur abgekühlt zu werden. 11. The method according to any one of claims 8 to 10, characterized in that the hot strip is first cooled and / or heated after hot rolling for targeted heat treatment by a predetermined temperature / time cycle and then kept constant at a temperature set in this way for a predetermined period is finally cooled to a desired final temperature.
PCT/EP1999/003058 1998-05-13 1999-05-05 System and method for producing steel strip WO1999058263A1 (en)

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