EP0449004A2 - Method and installation for manufacturing hot-rolled steel strip, in particular for special steels from a continuously cast material - Google Patents

Method and installation for manufacturing hot-rolled steel strip, in particular for special steels from a continuously cast material Download PDF

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Publication number
EP0449004A2
EP0449004A2 EP91103453A EP91103453A EP0449004A2 EP 0449004 A2 EP0449004 A2 EP 0449004A2 EP 91103453 A EP91103453 A EP 91103453A EP 91103453 A EP91103453 A EP 91103453A EP 0449004 A2 EP0449004 A2 EP 0449004A2
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EP
European Patent Office
Prior art keywords
rolling
stand
steckel
strip
mill
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EP91103453A
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German (de)
French (fr)
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EP0449004A3 (en
Inventor
Hans Friedrich Marten
Hans Malinowski
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Sms Schloemann Siemag AG
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Sms Schloemann Siemag AG
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B1/00Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • B21B1/466Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a non-continuous process, i.e. the cast being cut before rolling
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B1/00Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/24Metal-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
    • B21B1/26Metal-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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B1/00Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/30Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process
    • B21B1/32Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
    • B21B1/34Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work by hot-rolling

Definitions

  • the invention relates to a method and a plant for the production of hot-rolled steel strip, in particular for stainless steels from strip-shaped continuously cast starting material in successive working steps, the strip-shaped starting material being divided into pre-strip lengths after solidification and the pre-strips being heated to rolling temperature in a compensating furnace and then introduced into a rolling mill and are rolled in a sequence of roll passes to the intended final dimensions.
  • a method and a system according to the preamble of the main claim is known from DE-A1-32 41 745.
  • a Steckel mill is shown with winding furnaces provided on both sides of the roll stand; alternatively, it is proposed that the rolling mill can also be a multi-stand continuous finishing line of a hot strip mill.
  • the rolling mill can also be a multi-stand continuous finishing line of a hot strip mill.
  • the rolling mill is a multi-stand continuous finishing line of a hot strip mill, because the preliminary step is omitted as a result of the proposal according to the invention, and because relatively thin strip-shaped continuous casting material is already used.
  • This known design of a rolling mill either with a Steckel rolling mill or alternatively with a multi-stand continuous finishing line of a hot strip mill, as well as the corresponding operating methods result in a number of disadvantages when rolling different types of steel.
  • the invention has for its object to improve and perfect a method and a corresponding system so that the difficulties and technical limits mentioned are largely overcome.
  • the greatest possible flexibility should be achieved when rolling steels of different qualities with different programmable final dimensions, on the one hand avoiding excessive roll wear when rolling stainless steels and on the other Avoiding excessive scaling when rolling carbon steels or poor surface quality of the rolling stock.
  • This object is achieved in terms of process engineering in that the roughing of the strip-shaped primary material in a reversing Steckel mill and finishing rolling is carried out in a three or more stand tandem finishing train.
  • a plant for carrying out the method which comprises a continuous casting plant and a rolling mill arranged downstream of it and a compensating furnace is arranged between them, is characterized in accordance with the invention in that the rolling mill as a unit with a reversing Steckel stand and a three-stand or multi-stand tandem stand downstream thereof Finishing line is formed.
  • the plant has a CSP (Compact Strip Production) continuous casting plant (2) designed for the production of continuously cast broadband.
  • a first pair of scissors (3) is provided for dividing the strip-like pre-material into pre-strip lengths after it has solidified.
  • a compensating furnace (4) is then arranged, in which the divided pre-strips are subjected to a temperature compensation or a heating to the rolling temperature.
  • the system also includes a second pair of shears (5) and the CSP rolling mill (6). This is designed with a reversing Steckel scaffold (7) and a tandem finishing train (8) immediately downstream as an operating unit.
  • a Steckel furnace (9a, 9b) is arranged in front of and behind the Steckel stand (7).
  • Each Steckel furnace (9a, 9b) is equipped with a reel device for winding and unwinding the rolled strip (10) to and from the coil (11a, 11b).
  • the rolling mill (6) is expediently followed by a cooling section (13) and a coiler (14) for rolling up the finished rolled strip into a coil.
  • FIG. 1a shows a rolling diagram for stainless steels, for example 18/8 CrNi.
  • the primary material (1a) introduced from the compensating furnace (4) into the rolling mill (6) is pre-rolled, depending on the deformability of the material to be rolled, for example with a sequence of five roll passes in the Steckel reversing stand (7) and with three Stitches rolled in the tandem finishing train (8).
  • a slightly more difficult to deform stainless steel can, for example, be pre-rolled with seven passes in the reversing Steckel mill (7) and rolled with three passes in the tandem finishing train.
  • the number of passes in the Steckel mill (7) also depends on the intended degree of reduction of the rolling stock in relation to its deformability.
  • FIG. 1b A rolling diagram for carbon steels is shown in FIG. 1b. Afterwards, steel materials such as C15 or C45 can be pre-rolled with just one roll pass in the reversing Steckel stand (7) and finished rolled with three passes in the tandem finishing mill.
  • a total of eight or ten roll passes can be used to roll CSP cast strips made of stainless steels of 40 or 50 mm in thickness to the pre-programmed final thickness.
  • the process is also able to roll CSP-cast strips made of carbon steels, without using the plug-in furnaces (9a, 9b). This advantageously avoids the harmful influence of high scale formation.
  • the advantage is achieved that the roller wear in the Steckel stand is significantly reduced and the surface quality of the finished rolled strips is optimal by using the three or more stand tandem finishing train. Malfunctions and failures, for example due to frequent changing of the work rolls, are also advantageously avoided.
  • the distribution of the rolling work on the one hand on the reversing Steckel stand (7) and on the other hand on the tandem finishing train (8) at predetermined proportions results in the advantage of maximum flexibility for the rolling of steels from different materials to end products with optimal surface quality.
  • the system is also extremely compact and can be built and operated with the economical use of investment and operating resources.

Abstract

The present invention relates to a method and an installation for manufacturing hot-rolled steel strip, in particular for special steels, from a continuously cast material in strip form. The method should be as flexible as possible and allow both special steels and unalloyed carbon steels to be rolled economically, and the installation should take up less space, be economical to erect and operate and advantageously be usable for small to medium-size production quantities. The installation proposed is a CSP installation, a reversing Steckel mill being used for roughing the feed stock and a three- or multi-stand tandem finishing train being used for finishing, roughing being carried out with a number of Steckel mill passes determined by the type of rolling stock, and the finishing operation, which is decisive for the surface finish, being carried out with three or four passes in the finishing train. The rolling mill (6) in the installation is designed as a unit with a reversing Steckel stand (7) and a three- or multi-stand tandem finishing train (8) arranged downstream of the latter. <IMAGE>

Description

Die Erfindung betrifft ein Verfahren und eine Anlage zur Herstellung von warmgewalztem Stahlband, insbesondere für Edelstähle aus bandförmig stranggegossenem Vormaterial in aufeinanderfolgenden Arbeitsschritten, wobei das bandförmige Vormaterial nach Erstarrung in Vorbandlängen zerteilt und die Vorbänder in einem Ausgleichsofen auf Walztemperatur erwärmt und anschließend in ein Walzwerk eingeführt und in einer Folge von Walzstichen zu vorgesehenen Endabmessungen gewalzt werden.The invention relates to a method and a plant for the production of hot-rolled steel strip, in particular for stainless steels from strip-shaped continuously cast starting material in successive working steps, the strip-shaped starting material being divided into pre-strip lengths after solidification and the pre-strips being heated to rolling temperature in a compensating furnace and then introduced into a rolling mill and are rolled in a sequence of roll passes to the intended final dimensions.

Ein Verfahren und eine Anlage entsprechend dem Oberbegriff des Hauptanspruchs ist durch die DE-A1-32 41 745 bekannt. In dieser Druckschrift wird ein Steckelwalzwerk mit zu beiden Seiten des Walzgerüstes vorgesehenen Aufwickelöfen aufgezeigt; alternativ wird hierzu vorgeschlagen, daß das Walzwerk auch eine mehrgerüstige kontinuierliche Fertigstaffel einer Warmbandstraße sein kann. Hierzu wird ausgeführt, daß ein solches Steckelwalzwerk eine erhebliche Reduzierung der Anlagenlänge gestattet, weil bereits nach dem ersten Stich das ausgewalzte Gießband aufgewickelt und nach dem Reversierstich auf der anderen Seite des Walzgerüstes ebenfalls aufgewickelt wird. Dadurch entfällt der bei herkömmlichen Walzwerken erforderliche freie Auslauf des gewalzten Bandes, was insgesamt ebenfalls die Investitionskosten der Anlage reduziert. Es ist nach einem anderen Merkmal jedoch auch denkbar, daß das Walzwerk eine mehrgerüstige kontinuierliche Fertigstaffel einer Warmbandstraße ist, weil infolge des erfindungsgemäßen Vorschlages die Vorstufe entfällt, und weil bereits relativ dünnes bandförmiges Stranggießmaterial eingesetzt wird. Diese bekannte Ausgestaltung eines Walzwerkes entweder mit einem Steckelwalzwerk oder alternativ mit einer mehrgerüstigen kontinuierlichen Fertigstaffel einer Warmbandstraße sowie die entsprechenden Betriebsverfahren ergeben jedoch beim Walzen unterschiedlicher Stahlsorten eine Reihe von Nachteilen.A method and a system according to the preamble of the main claim is known from DE-A1-32 41 745. In this publication, a Steckel mill is shown with winding furnaces provided on both sides of the roll stand; alternatively, it is proposed that the rolling mill can also be a multi-stand continuous finishing line of a hot strip mill. For this purpose, it is stated that such a Steckel rolling mill considerable reduction in the length of the system is permitted because the rolled casting belt is wound up after the first stitch and also wound up on the other side of the roll stand after the reversing stitch. This eliminates the free runout of the rolled strip required in conventional rolling mills, which also reduces the overall investment costs of the plant. According to another feature, however, it is also conceivable that the rolling mill is a multi-stand continuous finishing line of a hot strip mill, because the preliminary step is omitted as a result of the proposal according to the invention, and because relatively thin strip-shaped continuous casting material is already used. This known design of a rolling mill either with a Steckel rolling mill or alternatively with a multi-stand continuous finishing line of a hot strip mill, as well as the corresponding operating methods result in a number of disadvantages when rolling different types of steel.

Bekanntlich ist das Auswalzen von Bändern aus Kohlenstoffstählen mit Steckelwalzwerken für niedrige bis mittlere Produktionsmengen nachteilig wegen der langen Verweildauer der Bänder in den Steckelöfen und der damit verbundenen hohen Verzunderung. Bei der Auswalzung von Bändern aus Edelstählen in Steckelwalzwerken ist hingegen die Verzunderung erheblich geringer. Deshalb kann grundsätzlich dieses Walzverfahren für niedrige bis mittlere Produktionsmengen angewendet werden. Dabei ist aber wegen der Vielzahl von Walzstichen in einem Steckelgerüst der Verschleiß der Arbeitswalzen relativ hoch und wirkt sich zudem ungünstig auf die Oberflächenqualität der gewalzten Bänder aus. Inbesondere trifft dies auf die letzten drei Walzstiche zu. Um hier Abhilfe zu schaffen, kann zwar ein häufiges Wechseln der Arbeitswalzen vorgesehen werden, hierdurch ergeben sich jedoch häufige Betriebsstörungen mit allen negativen Folgen einer Unterbrechung der in sich geschlossenen Verfahrens- und Produktionskette.It is known that the rolling out of carbon steel strips with Steckel rolling mills for low to medium production quantities is disadvantageous because of the long residence time of the strips in the Steckel furnaces and the associated high scaling. In contrast, when rolling out strips of stainless steel in Steckel rolling mills, the scaling is considerably less. Therefore, this rolling process can basically be used for low to medium production quantities. But there is Due to the large number of roll passes in a Steckel stand, the wear on the work rolls is relatively high and also has an unfavorable effect on the surface quality of the rolled strips. This applies in particular to the last three roll passes. In order to remedy this, frequent changing of the work rolls can be provided, but this results in frequent malfunctions with all negative consequences of an interruption of the self-contained process and production chain.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine entsprechende Anlage so zu verbessern und zu vervollkommnen, daß die genannten Schwierigkeiten und technischen Grenzen weitgehend überwunden werden. Bei möglichst geringer Inanspruchnahme von Bauvolumen und Investitionskosten der Anlage sowie entspechend rationeller Ausgestaltung des Verfahrens soll eine möglichst große Flexibilität beim Walzen von Stählen unterschiedlicher Qualitäten mit unterschiedlich programmierbaren Endabmessungen erreicht werden, und zwar einerseits unter Vermeidung von zu hohem Walzenverschleiß beim Walzen von Edelstählen und andererseits unter Vermeidung von zu hoher Verzunderung beim Walzen von Kohlenstoffstählen bzw. schlechter Oberflächenqualität des Walzgutes.The invention has for its object to improve and perfect a method and a corresponding system so that the difficulties and technical limits mentioned are largely overcome. With as little use as possible of the construction volume and investment costs of the plant and correspondingly rational design of the process, the greatest possible flexibility should be achieved when rolling steels of different qualities with different programmable final dimensions, on the one hand avoiding excessive roll wear when rolling stainless steels and on the other Avoiding excessive scaling when rolling carbon steels or poor surface quality of the rolling stock.

Diese Aufgabe wird erfindungsgemäß verfahrenstechnisch dadurch gelöst, daß das Vorwalzen des bandförmigen Vormaterials in einem Reversier-Steckelwalzwerk und das Fertigwalzen in einer drei - oder mehrgerüstigen Tandem-Fertigstraße erfolgt.This object is achieved in terms of process engineering in that the roughing of the strip-shaped primary material in a reversing Steckel mill and finishing rolling is carried out in a three or more stand tandem finishing train.

Zweckmäßige Ausgestaltungen des Verfahrens sind Gegenstand von Unteransprüchen.Appropriate embodiments of the method are the subject of subclaims.

Eine Anlage zur Durchführung des Verfahrens, wobei diese eine Stranggießanlage und ein dieser nachgeordnetes Walzwerk umfaßt und zwischen diesen ein Ausgleichsofen angeordnet ist, ist erfindungsgemäß dadurch gekennzeichnet, daß das Walzwerk als Einheit mit einem Reversier-Steckelgerüst und einer diesem nachgeordneten drei- oder mehrgerüstigen Tandem-Fertigstraße ausgebildet ist.A plant for carrying out the method, which comprises a continuous casting plant and a rolling mill arranged downstream of it and a compensating furnace is arranged between them, is characterized in accordance with the invention in that the rolling mill as a unit with a reversing Steckel stand and a three-stand or multi-stand tandem stand downstream thereof Finishing line is formed.

Weitere Einzelheiten, Merkmale und Vorteile ergeben sich aus der nachfolgenden Erläuterung der in den Zeichnungen schematisch dargestellten Ausführungsbeispiele.Further details, features and advantages result from the following explanation of the exemplary embodiments shown schematically in the drawings.

Es zeigen:

Fig. 1a
ein Diagramm der Arbeitsschritte des erfindungsgemäßen Verfahrens mit Angabe der Stichfolge beim Walzen von Edelstählen,
Fig. 1b
ein Diagramm der Arbeitsschritte mit Angabe der Stichfolge beim Walzen von Kohlenstoffstählen,
Fig. 2
ein erfindungsgemäßes Anlagenschema.
Show it:
Fig. 1a
2 shows a diagram of the working steps of the method according to the invention with the sequence of steps in the rolling of stainless steels,
Fig. 1b
a diagram of the working steps with specification of the sequence when rolling carbon steels,
Fig. 2
an inventive system diagram.

Die Anlage weist gemäß Figur 2 eine zur Herstellung von stranggegossenem Breitband ausgebildete CSP (Compact Strip Production) -Stranggießanlage (2) auf. Zum Zerteilen des bandförmigen Vormaterials in Vorbandlängen nach dessen Erstarrung ist eine erste Schere (3) vorgesehen. Anschließend ist ein Ausgleichsofen (4) angeordnet, worin die abgeteilten Vorbänder, einem Temperaturausgleich bzw. einer Erwärmung auf Walztemperatur unterzogen werden. Weiterhin umfaßt die Anlage eine zweite Schere (5) sowie das CSP-Walzwerk (6). Dieses ist mit einem Reversier-Steckelgerüst (7) und einer unmittelbar nachgeordneten Tandem- Fertigstraße (8) als Betriebseinheit ausgebildet. In Richtung des Produktionsfortschrittes (12) ist vor und hinter dem Steckelgerüst (7) je ein Steckelofen (9a, 9b) angeordnet. Jeder Steckelofen (9a, 9b) ist mit einer Haspeleinrichtung zum Auf- und Abwickeln des Walzbandes (10) zum bzw. vom Coil (11a, 11b) ausgestattet. Dem Walzwerk (6) ist zweckmäßigerweise eine Kühlstrecke (13) und eine Haspelanlage (14) zum Aufrollen des fertiggewalzten Bandes zu einem Coil nachgeordnet.According to FIG. 2, the plant has a CSP (Compact Strip Production) continuous casting plant (2) designed for the production of continuously cast broadband. A first pair of scissors (3) is provided for dividing the strip-like pre-material into pre-strip lengths after it has solidified. A compensating furnace (4) is then arranged, in which the divided pre-strips are subjected to a temperature compensation or a heating to the rolling temperature. The system also includes a second pair of shears (5) and the CSP rolling mill (6). This is designed with a reversing Steckel scaffold (7) and a tandem finishing train (8) immediately downstream as an operating unit. In the direction of production progress (12), a Steckel furnace (9a, 9b) is arranged in front of and behind the Steckel stand (7). Each Steckel furnace (9a, 9b) is equipped with a reel device for winding and unwinding the rolled strip (10) to and from the coil (11a, 11b). The rolling mill (6) is expediently followed by a cooling section (13) and a coiler (14) for rolling up the finished rolled strip into a coil.

In der Figur 1a ist ein Walzdiagramm für Edelstähle, beispielsweise 18/8 CrNi dargestellt. Das aus dem Ausgleichsofen (4) in das Walzwerk (6) eingeführte Vormaterial (1a) wird, je nach Maßgabe der Verformbarkeit des zu walzenden Materials, beispielsweise mit einer Folge von fünf Walzstichen im Steckel-Reversiergerüst (7) vorgewalzt und mit drei Stichen in der Tandem-Fertigstraße (8) fertiggewalzt. Ein etwas schwerer verformbarer Edelstahl kann beispielsweise mit sieben Stichen im Reversier-Steckelwalzwerk (7) vorgewalzt und mit drei Stichen in der Tandem-Fertigstraße zuende gewalzt werden. Selbstverständlich richtet sich die Anzahl der Stiche im Steckelwalzwerk (7) auch nach dem vorgesehenen Grad der Reduktion des Walzgutes im Verhältnis zu dessen Verformbarkeit.FIG. 1a shows a rolling diagram for stainless steels, for example 18/8 CrNi. The primary material (1a) introduced from the compensating furnace (4) into the rolling mill (6) is pre-rolled, depending on the deformability of the material to be rolled, for example with a sequence of five roll passes in the Steckel reversing stand (7) and with three Stitches rolled in the tandem finishing train (8). A slightly more difficult to deform stainless steel can, for example, be pre-rolled with seven passes in the reversing Steckel mill (7) and rolled with three passes in the tandem finishing train. Of course, the number of passes in the Steckel mill (7) also depends on the intended degree of reduction of the rolling stock in relation to its deformability.

In der Figur 1b ist ein Walzdiagramm für Kohlenstoffstähle dargestellt. Danach können Stahlwerkstoffe wie zum Beispiel C15 oder C45 mit nur einem Walzstich im Reversier-Steckelgerüst (7) vorgewalzt und mit drei Stichen in der Tandem-Fertigstraße fertiggewalzt werden.A rolling diagram for carbon steels is shown in FIG. 1b. Afterwards, steel materials such as C15 or C45 can be pre-rolled with just one roll pass in the reversing Steckel stand (7) and finished rolled with three passes in the tandem finishing mill.

In beiden Fällen des vorgeschlagenen Verfahrens handelt es sich um eine kontinuierliche Verfahrenskette in einer CSP-Anlage, bei der im Anschluß an die Erwärmung des stranggegossenen Vormaterials im Ausgleichsofen der bzw. die erste(n) Verformungsstich(e) im Steckelwalzgerüst (7) und die jeweils letzten drei oder vier, hauptsächlich für die Oberflächenqualität maßgebenden Stiche in der dreigerüstigen Fertigstraße durchgeführt werden.In both cases of the proposed process, there is a continuous process chain in a CSP plant, in which, following the heating of the continuously cast primary material in the compensating furnace, the first deformation stitch (s) in the Steckel mill stand (7) and the the last three or four stitches, which are mainly decisive for the surface quality, are carried out in the three-stand finishing train.

Nach diesem Verfahren und in dieser Anlage können demnach mit insgesamt acht oder zehn Walzstichen CSP-gegossene Bänder aus Edelstählen von 40 oder 50 mm Dicke auf die jeweils vorprogrammierte Enddicke ausgewalzt werden. Dabei ist die Anlage und das Verfahren aber auch in der Lage, CSP-gegossene Bänder aus Kohlenstoffstählen zu walzen, und zwar ohne den Einsatz der Steckelöfen (9a, 9b). Dadurch wird mit Vorteil der schädliche Einfluß einer hohen Zunderbildung vermieden. Für das Auswalzen von 40 bis 50 mm dicken gegossenen CSP-Bändern aus Kohlentoffstählen steht das Walzwerk (6) mit dem nicht im Reversierbetrieb eingesetzten Steckel-Walzgerüst (7) und der nachgeordneten dreigerüstigen Tandem-Fertigstraße (8) als Einheit in Form einer viergerüstigen Bandstraße zur Verfügung. Dabei wird in beiden Fällen der Vorteil erzielt, daß der Walzenverschleiß im Steckelgerüst signifikant reduziert und die Oberflächenqualität der fertiggewalzten Bänder durch Einsatz der drei - oder mehrgerüstigen Tandem-Fertigstraße optimal ist. Vorteilhaft werden auch Betriebsstörungen und Ausfälle, z.B. durch häufiges Wechseln der Arbeitswalzen, vermieden. Die Aufteilung der Walzarbeit einerseits auf das Reversier-Steckelgerüst (7) und andererseits auf die Tandem-Fertigstraße (8) zu jeweils vorgegebenen Anteilen ergibt den Vorteil eines Höchstmaßes an Flexibilität für das Walzen von Stählen aus unterschiedlichem Material zu Endprodukten mit optimaler Oberflächenqualität. Die Anlage ist zudem äußerst kompakt und mit ökonomischem Einsatz von Investitions- und Betriebsmitteln erstellbar und betreibbar.According to this process and in this system, a total of eight or ten roll passes can be used to roll CSP cast strips made of stainless steels of 40 or 50 mm in thickness to the pre-programmed final thickness. Here is the system and that However, the process is also able to roll CSP-cast strips made of carbon steels, without using the plug-in furnaces (9a, 9b). This advantageously avoids the harmful influence of high scale formation. The rolling mill (6) with the Steckel mill stand (7), which is not used in reversing operation, and the downstream three-stand tandem finishing train (8) as a unit in the form of a four-stand strip mill stand for the rolling of 40 to 50 mm thick cast CSP strips made of carbon steel to disposal. In both cases, the advantage is achieved that the roller wear in the Steckel stand is significantly reduced and the surface quality of the finished rolled strips is optimal by using the three or more stand tandem finishing train. Malfunctions and failures, for example due to frequent changing of the work rolls, are also advantageously avoided. The distribution of the rolling work on the one hand on the reversing Steckel stand (7) and on the other hand on the tandem finishing train (8) at predetermined proportions results in the advantage of maximum flexibility for the rolling of steels from different materials to end products with optimal surface quality. The system is also extremely compact and can be built and operated with the economical use of investment and operating resources.

Claims (9)

Verfahren zur Herstellung von warmgewalztem Stahlband, insbesondere für Edelstähle aus bandförmig stranggegossenem Vormaterial in aufeinanderfolgenden Arbeitsschritten, wobei das bandförmige Vormaterial nach Erstarrung in Vorbandlängen zerteilt und die Vorbänder in einem Ausgleichsofen auf Walztemperatur erwärmt, anschließend in ein Walzwerk eingeführt und in einer Folge von Walzstichen vor- und zu programmierten Endabmessungen fertiggewalzt werden, dadurch gekennzeichnet, daß das Vorwalzen des bandförmigen Vormaterials in einem Reversier-Steckelwalzwerk und das Fertigwalzen in einer drei- oder mehrgerüstigen Tandem-Fertigstraße erfolgt.Process for the production of hot-rolled steel strip, in particular for stainless steels from strip-shaped continuously cast material, in successive working steps, the strip-shaped material being solidified into strip lengths after solidification and the strip being heated to rolling temperature in a compensating furnace, then introduced into a rolling mill and pre-rolled in a sequence of rolls. and finish-rolled into programmed final dimensions, characterized in that the pre-rolling of the strip-shaped primary material takes place in a reversing Steckel rolling mill and the finishing rolling takes place in a three-stand or multi-stand tandem finishing train. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Vorwalzen mit einer nach Maßgabe der Verformbarkeit des zu walzenden Materials vorgegebenen Anzahl von Walzstichen im Reversier-Steckelwalzwerk und das für die Einhaltung der vorgegebenen Endabmessungen sowie der Oberflächenqualität maßgebende Fertigwalzen mit vorzugsweise drei oder vier Walzstichen in der Tandem-Fertigstraße durchgeführt wird.A method according to claim 1, characterized in that the preliminary rolling with a predetermined number of rolling passes in the reversing Steckel rolling mill in accordance with the deformability of the material to be rolled and the finishing rolls which are decisive for maintaining the predetermined final dimensions and the surface quality, preferably with three or four rolling passes in the Tandem finishing train is carried out. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß beim Walzen von stranggegossenen Bändern aus einem vergleichsweise leichter verformbaren Edelstahl das Vorwalzen mit wenigstens fünf Stichen in einem zwei Steckelöfen aufweisenden Reversier-Steckelwalzwerk und das Fertigwalzen mit vorzugsweise drei oder vier Stichen in der Tandem-Fertigstraße durchgeführt wird.Method according to claim 1 or 2, characterized in that when rolling continuously cast strips made of a comparatively more easily deformable stainless steel, the preliminary rolling with at least five stitches in a two plug-in furnace Reversing Steckel rolling mill and the finishing rolling with preferably three or four passes is carried out in the tandem finishing train. Verfahren nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß beim Walzen von stranggegossenen Bändern aus einem vergleichsweise schwerer verformbaren Edelstahl das Vorwalzen mit wenigstens sieben Stichen in einem zwei Steckelöfen aufweisenden Reversier-Steckelwalzwerk und das Fertigwalzen mit vorzugsweise drei oder vier Stichen in der Tandem-Fertigstraße durchgeführt wird.Method according to one or more of claims 1 to 3, characterized in that when rolling continuously cast strips made of a comparatively more difficult to deform stainless steel, the preliminary rolling with at least seven stitches in a reversing stick rolling mill having two plug-in furnaces and the finish rolling with preferably three or four stitches in the tandem finishing train is carried out. Verfahren nach einem oder mehreren der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß beim Walzen von stranggegossenen Bändern aus Kohlenstoffstählen das Vorwalzen im Steckelwalzwerk mit einem Stich ohne Einsatz von Steckelöfen und das Fertigwalzen mit vorzugsweise drei oder vier Stichen in der Tandem-Fertigstraße durchgeführt wird.Method according to one or more of claims 1 to 4, characterized in that when rolling continuously cast strips made of carbon steels, the pre-rolling in the Steckel rolling mill is carried out with one pass without the use of Steckel furnaces and the finish rolling with preferably three or four passes is carried out in the tandem finishing train. Verfahren nach einem oder mehreren der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß es sowohl zum Walzen von Edelstählen als auch zum Walzen von Kohlenstoffstählen anwendbar ist.Method according to one or more of claims 1 to 5, characterized in that it can be used both for rolling stainless steels and for rolling carbon steels. Verfahren nach einem oder mehreren der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß beim Walzen von stranggegossenen Bändern aus C-Stählen mit einem Reversier-Steckelwalzwerk und einer n-gerüstigen Tandem-Fertigstraße das Walzwerk als n+i-gerüstige Bandstraße verwendet wird.Method according to one or more of claims 1 to 6, characterized in that when rolling continuously cast strips made of carbon steels with a reversible Steckel rolling mill and an n-stand tandem finishing train, the rolling mill is used as an n + i-stand strip mill. Anlage zur Herstellung von warmgewalztem Stahlband, insbesondere für Edelstähle, aus bandförmig stranggegossenem Vormaterial in aufeinanderfolgenden Arbeitsschritten, zur Durchführung des Verfahrens nach einem oder mehreren der Ansprüche 1 bis 7, wobei diese eine Stranggießanlage (2) und ein dieser nachgeordnetes Walzwerk (6) umfaßt und zwischen diesen ein Ausgleichsofen (4) angeordnet ist, dadurch gekennzeichnet, daß das Walzwerk (6) als Einheit mit einem Reversier-Steckelgerüst (7) und einer diesem nachgeordneten drei - oder mehrgerüstigen Tandem-Fertigstraße (8) ausgebildet ist.Plant for the production of hot-rolled steel strip, in particular for stainless steels, from strip-shaped continuous material in successive working steps, for carrying out the method according to one or more of claims 1 to 7, which comprises a continuous casting plant (2) and a rolling mill (6) arranged downstream of it a compensating furnace (4) is arranged between them, characterized in that the rolling mill (6) is designed as a unit with a reversing plug-in stand (7) and a three-stand or multi-stand tandem finishing train (8) arranged downstream thereof. Anlage nach Anspruch 8, dadurch gekennzeichnet, daß in Richtung des Produktionsfortschrittes (12) je ein Steckel- bzw. Haspelofen (9a, 9b) vor und hinter dem Steckelgerüst (7) angeordnet ist.Plant according to claim 8, characterized in that in the direction of production progress (12) a Steckel or reel furnace (9a, 9b) is arranged in front of and behind the Steckel stand (7).
EP19910103453 1990-03-28 1991-03-07 Method and installation for manufacturing hot-rolled steel strip, in particular for special steels from a continuously cast material Withdrawn EP0449004A3 (en)

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DE19904009860 DE4009860C2 (en) 1990-03-28 1990-03-28 Process and plant for the production of hot-rolled steel strip, in particular for stainless steels, from strip-shaped continuous material

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EP0594828A1 (en) * 1992-05-12 1994-05-04 Tippins Incorporated Method and apparatus for intermediate thickness slab caster and inline hot strip and plate line
EP0734793A1 (en) * 1995-03-28 1996-10-02 MANNESMANN Aktiengesellschaft Method and apparatus for the production of hot-rolled steel strip
EP0937512A1 (en) * 1998-02-19 1999-08-25 Kvaerner Metals Continuous Casting Limited Low cost apparatus and method for manufacture of light gauge steel strip
EP0947590A1 (en) * 1998-03-31 1999-10-06 Sms Schloemann-Siemag Aktiengesellschaft Method of manufacturing micro-alloyed construction steels
WO2005049241A1 (en) * 2003-10-24 2005-06-02 Sms Demag Aktiengesellschaft Rolling mill for hot-rolling metal, in particular, aluminium in addition to hot-rolling method
WO2009036894A1 (en) * 2007-09-13 2009-03-26 Sms Siemag Ag Compact, flexible csp facility for continuous, semi-continuous and batch operation
WO2015014864A1 (en) * 2013-07-30 2015-02-05 Sms Siemag Ag Casting and rolling plant and method for producing slabs
CN106583455A (en) * 2017-02-07 2017-04-26 唐山市丰南区嘉谊牧栏杆厂 Fence stake continuous casting and rolling production line based on intermediate frequency furnace smelting

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Publication number Priority date Publication date Assignee Title
EP0594828A1 (en) * 1992-05-12 1994-05-04 Tippins Incorporated Method and apparatus for intermediate thickness slab caster and inline hot strip and plate line
EP0594828A4 (en) * 1992-05-12 1995-07-12 Tippins Inc Method and apparatus for intermediate thickness slab caster and inline hot strip and plate line.
EP0734793A1 (en) * 1995-03-28 1996-10-02 MANNESMANN Aktiengesellschaft Method and apparatus for the production of hot-rolled steel strip
EP0937512A1 (en) * 1998-02-19 1999-08-25 Kvaerner Metals Continuous Casting Limited Low cost apparatus and method for manufacture of light gauge steel strip
EP0947590A1 (en) * 1998-03-31 1999-10-06 Sms Schloemann-Siemag Aktiengesellschaft Method of manufacturing micro-alloyed construction steels
WO2005049241A1 (en) * 2003-10-24 2005-06-02 Sms Demag Aktiengesellschaft Rolling mill for hot-rolling metal, in particular, aluminium in addition to hot-rolling method
WO2009036894A1 (en) * 2007-09-13 2009-03-26 Sms Siemag Ag Compact, flexible csp facility for continuous, semi-continuous and batch operation
AU2008300996C1 (en) * 2007-09-13 2012-08-23 Sms Siemag Ag Compact, flexible CSP facility for continuous, semi-continuous and batch operation
WO2015014864A1 (en) * 2013-07-30 2015-02-05 Sms Siemag Ag Casting and rolling plant and method for producing slabs
CN106583455A (en) * 2017-02-07 2017-04-26 唐山市丰南区嘉谊牧栏杆厂 Fence stake continuous casting and rolling production line based on intermediate frequency furnace smelting

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DE4009860C2 (en) 1999-11-18
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