EP0853987A2 - Plant for the production of a strip, a pre-strip or a stab - Google Patents

Plant for the production of a strip, a pre-strip or a stab Download PDF

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Publication number
EP0853987A2
EP0853987A2 EP98104670A EP98104670A EP0853987A2 EP 0853987 A2 EP0853987 A2 EP 0853987A2 EP 98104670 A EP98104670 A EP 98104670A EP 98104670 A EP98104670 A EP 98104670A EP 0853987 A2 EP0853987 A2 EP 0853987A2
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EP
European Patent Office
Prior art keywords
strand
deformation
strip
forming
slab
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP98104670A
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German (de)
French (fr)
Other versions
EP0853987A3 (en
EP0853987B1 (en
Inventor
Andreas Dipl.-Ing. Flick
Gerlinde Dipl.-Ing. Djumlija
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Primetals Technologies Austria GmbH
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Voest Alpine Industrienlagenbau GmbH
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Application filed by Voest Alpine Industrienlagenbau GmbH filed Critical Voest Alpine Industrienlagenbau GmbH
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Publication of EP0853987A3 publication Critical patent/EP0853987A3/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
    • B21B1/26—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
    • 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
    • B21B2201/00—Special rolling modes
    • B21B2201/14—Soft reduction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B21B3/02—Rolling special iron alloys, e.g. stainless steel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4998—Combined manufacture including applying or shaping of fluent material
    • Y10T29/49988—Metal casting
    • Y10T29/49991—Combined with rolling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
    • Y10T29/5184—Casting and working

Definitions

  • the known system not only requires a complex construction, but is also complicated in terms of control technology and requires a large number of control technology for operation Facilities. Accordingly, it requires a considerable investment. Furthermore it brings with it a large degree of production uncertainty, because of the large number of continuously engaging drive units in the event of failure of part of it The entire process is stopped and the casting process has to be stopped.
  • the known system there is no flexibility with regard to product quality and quality of the given manufacturing products.
  • the first deformation step always be carried out, otherwise a thinness of the Product and therefore production cannot be guaranteed. So that is the known System cannot be used for certain steel qualities.
  • the quality targeted and flexible temperature control of the finished product is hardly possible, especially in the case of transient conditions. If the winding unit fails, there is also the entire process immediately comes to a standstill; this also includes the standstill of the casting process a.
  • a system for producing a tape in a thickness of 2 to 25 mm is from the EP-B 0 286 862 known.
  • a steel strand is cast by casting Melt formed in a funnel-shaped continuous mold and as it passed through the same already deformed.
  • the strand which still has a liquid core, becomes after Exit from the continuous mold so compressed that there is a weld the inner walls of the strand shells that have already solidified. This will create a Thickness reduction to a thickness of less than 25 mm achieved.
  • This known system can be However, only use it for very specific steel qualities, namely those that do Allow deformation just below the continuous mold.
  • the funnel-shaped continuous mold does not allow an even flow distribution, i.e. it can by the pouring jet emerging from the dip tube already strong stressed strand shell at the critical deformation points by melting weakened, which manifests itself in increased risk of breakthrough.
  • Another disadvantage lies in the very low flexibility in terms of production capacity and in terms of the utilization of the full casting speed range.
  • EP-B-0 327 854 describes a plant for rolling on a continuous strip casting plant cast pre-strips known, the cast pre-strip in a continuous Work step brought to the rolling temperature and rolled out into the finishing mill is introduced.
  • the invention aims to avoid the disadvantages and described above Difficulties and the task is to create a system that is at high Product quality enables the production of tapes as thin as possible, with a very high Operational flexibility is given.
  • continuous casting should start in the event of a malfunction a deformation stage downstream of the continuous mold can be continued.
  • plate molds with plane-parallel walls can be used Find use. In connection with an immersion tube, this has the consequence that a forms even strand shell. This is neither deformed in the continuous mold still squeezed because it has a constant cross-section.
  • the one out the strand emerging from the continuous mold is due to the inside of the continuous mold stable operating conditions (homogeneous conditions such as uniform lubrication and uniform cooling) on a strand shell of the highest quality, so that the Breakthrough risk is minimized and deformation of the still liquid core having strand is possible without the risk of breakthrough.
  • the high flexibility of the system according to the invention enables that preferably through first two process stages, applied individually or together, a reduction in Thickness of the strand down to a thickness of 30 mm or an overlying thickness is carried out.
  • the separated strand piece thus has a thickness of at least 30 mm before it is fed to further rolling. This thickness can in the case of Switching off the first two deformation stages up to the casting thickness, i.e. until preferably a maximum of 150 mm, in particular 100 mm.
  • the first deformation stage preferably has hydraulically adjustable against each other Rolls causing deformation of the strand.
  • A is advantageous between the separating device and the third deformation stage Device for temperature homogenization of the separated strand pieces, such as a Temperature compensation furnace provided, the device for temperature homogenization expediently with a storage device for receiving several separated Strand pieces is provided.
  • the invention is based on an exemplary embodiment Schematic sketch explained in more detail.
  • the one continuous has a constant cross section and is preferably designed as a plate mold.
  • cast strands with a thickness 2 between 60 and 150 mm, preferably in a thickness between 60 and 100 mm (so-called thin slabs) will.
  • thin slabs For continuous molds of this thickness, the use of a conventional one Dip tube 3 possible, resulting in stable operating conditions, which cooling and Melt distribution concerns, so that the leaving the continuous mold 1 Strand 4 is a uniform and stable strand shell having.
  • the continuous mold 1 which is preferably straight Mold is designed to form a first Deformation stage arranged a vertical support structure 5, the hydraulic (- as indicated by pressure cylinder 6 -) the strand shell has adjustable support rollers 7.
  • This Vertical support frame is divided into two sub-segments 5 ', 5' ', so that with each rope segment different forces on the Strand 4 can be applied.
  • this Vertical support frame 5 becomes a so-called “soft reduction” of the solidifying strand 4 with the liquid core as the first Deformation stage performed, the load on the Strand shell in the two-phase boundary layer under one Ultimate elongation influencing end product quality remains.
  • this so-called "soft reduction” one can Reduction of the strand thickness by up to 30 mm without Achieve quality losses.
  • further arc segments 8, 9 are provided, which optionally also hydraulically adjustable support rollers 7 exhibit.
  • a simple (possibly multi-stage) Deformation scaffold 10 passed which is used to deform the now already solidified strand 4 as the second Deformation stage (second deformation step) can be activated can.
  • the strand 4 descaling in a descaling device 11 subjected to soft descaling by means of rotating Descaling nozzles and with special water wipers for the descaling water enables.
  • the thickness pre-reduction allows one before the temperature compensation Influencing the end product quality especially for microalloyed steels, which are usually replaced by appropriate Stitch decreases above the recrystallization stop temperature Precipitation and recrystallization processes are influenced.
  • the strand 4 preferably has the format a roughing strip, i.e. a (non-wrapable) raw material for tape production.
  • the thickness 12 is preferably 30 mm and more.
  • a separating device is arranged downstream of the deformation framework 7 13 for the transverse division of the cast strand 4, which depends on Requirements for the end product in the continuous caster deformed strand 4 using hydraulic scissors in the Coil weights corresponding lengths are separated.
  • the resulting strand pieces 14 with a thickness of 30 to 150 mm then run into a transport and homogenization facility, e.g. a roller hearth furnace 15, depending on the slab temperature is also able to heat a thin slab.
  • a transport and homogenization facility e.g. a roller hearth furnace 15, depending on the slab temperature is also able to heat a thin slab.
  • this Roller hearth furnace 15 is the entire cross section of the strand piece 14, in particular their edges, to a uniform temperature brought.
  • the strand pieces can are buffered (stored, e.g. by stacking), i.e. in the In the event of brief malfunctions in a part of the facility Thin slabs or strand pieces 14 added until it Resumption of the manufacturing process is coming.
  • roller hearth furnace 15 Following the roller hearth furnace 15 is another Separating device, which is designed as hydraulic scissors 16 is provided, in the event of a malfunction in the following Rolling mill stage 17 functioning as the third deformation stage is activated.
  • a descaling device 18 Before entering rolling mill stage 17 descaling in a descaling device 18, the preferably a rotor descaling with low water consumption and the resulting low temperature drop excellent descaling effect.
  • the strand pieces are rolled in the Rolling mill stage 17, which consists of finishing stands 19.
  • the number of the finishing stands 19 of the finishing train results from the thickness 12 of the strand pieces 14 after separation from the cast strand 4 and of the strip thickness to be rolled 20.
  • the strand pieces 14 no ⁇ - ⁇ conversion until that point in time Manufacturing process to which the ⁇ - ⁇ conversion is due material science processes to achieve the required mechanical-technological characteristics and toughness for the steel grade is required.
  • the finishing train can be Steckel rolling mill to be replaced. This possibility will preferably for the production of hot strips made of stainless steel Steel or special steel made from thin slabs.
  • the rolled Strand piece 14 After leaving the rolling mill stage 17, the rolled Strand piece 14 in a cooling section 21 (laminar cooling section) Cooled reel temperature and by means of a reel device 22 wound into a bundle 23.
  • the finished rolled strip is 24 designated.
  • the possible combinations of the three deformation levels increase the overall system flexibility, because without “soft reduction” (first deformation stage) liquid sump or rolling after solidification (second Deformation step) the overall process without quality and Performance loss in operation remains.
  • first deformation stage liquid sump or rolling after solidification
  • second Deformation step the overall process without quality and Performance loss in operation remains.
  • the arrangement allows the energy to be optimized Overall process by balancing the casting thickness (D) and Final thickness (P) with the aim of achieving the greatest possible enthalpy Bring strand pieces in the roller hearth furnace 15. Reached this is achieved through a dynamic cooling regime using air-water jets to increase the exit temperature of the strand as well as "soft descaling".
  • the diversity of the system according to the invention is documented in the table below.
  • the first deformation stage - with a thickness reduction of 10 mm - is designated I and the second deformation stage - with a thickness reduction of 20 mm - with II. If the corresponding deformation level is activated, this is marked with an X, if it is not activated, it is marked with a 0.
  • An N indicates that these strip thicknesses should not be produced solely by the process steps according to the invention.
  • the third deformation stage (rolling mill stage 17) is always in operation with five to seven finishing stands 19 for the dimensional ranges specified in the table.

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

Abstract

The installation incorporates a run-through mould (1) with a constant cross-section over its entire length, a first forming section (5-9) for the slab with liquid core, a second forming section (10) for the solidified slab, a third forming section (17) made up of single or multiple hot-rolling units (19), and cutting-off station (13) between the second and third forming stations. The forming sections are activated singly, in pairs or all together, dependent on whether slab (not previously forming operations) preliminary strip, or strip (including the thinnest possible) is produced. Only the second and third forming sections are activated for high-strength tube steels, as well as for austenitic and duplex steels. The second forming stage is preceded by a scale removal process. The first forming section (5-9) consist of rolls (7) which are hydraulically adjustable against one another. A temp. equalisation furnace (15) is foreseen between the cutting-off station (13) and the third forming section (17).

Description

Die Erfindung betrifft eine Stranggießanlage mit

  • einer Durchlaufkokille mit einem durchlaufend gleichbleibenden Querschnitt einer Bramme,
  • einer ersten Verformungsstufe, die im Bereich unterhalb der Kokille, in dem der Strang einen flüssigen Kern aufweist, vorgesehen ist,
  • einer zweiten Verformungsstufe, die in dem Bereich, in dem der Strang bereits durcherstarrt ist, vorgesehen ist,
  • einer dritten Verformungsstufe, die von einem ein- oder mehrgerüstigen Warmwalzgerüst gebildet ist, und
  • einer zwischen der zweiten und der dritten Verformungsstufe angeordneten Trenneinrichtung zur Herstellung von vom Strang abgetrennten Strangstücken.
The invention relates to a continuous caster
  • a continuous mold with a consistently constant cross-section of a slab,
  • a first deformation stage, which is provided in the area below the mold, in which the strand has a liquid core,
  • a second deformation stage, which is provided in the area in which the strand has already solidified,
  • a third deformation stage, which is formed by a single or multi-stand hot rolling stand, and
  • a separating device arranged between the second and the third deformation stage for producing strand pieces separated from the strand.

Eine Anlage zum Herstellen eines warmgewalzten Bandes mit möglichst geringer Dicke mit Hilfe des Stranggießverfahrens und anschließendem Walzen des Stranggußproduktes ist aus der PCT-Veröffentlichung WO 92/00815 bekannt. Hierbei wird das Gußprodukt nach Austritt aus der Durchlaufkokille einem ersten Verformungsschritt unterworfen, bei dem das Gußprodukt noch einen flüssigen Kern aufweist. Nach Durcherstarrung erfolgt ein weiterer Verformungsschritt durch Walzen des durcherstarrten Gußproduktes, das anschließend auf Warmwalztemperatur erhitzt und zu einem Bund gewickelt wird. Anschließend erfolgt eine Fertigwarmwalzung.A system for producing a hot-rolled strip with the smallest possible thickness Help of the continuous casting process and subsequent rolling of the continuous cast product is over PCT publication WO 92/00815. Here, the cast product after it leaves subjected to a first deformation step from the continuous mold, in which the Cast product still has a liquid core. After solidification there is another Deformation step by rolling the solidified cast product, which then on Hot rolling temperature is heated and wound into a bundle. Then there is one Finish hot rolling.

Die bekannte Anlage erfordert nicht nur eine aufwendige Konstruktion, sondern ist auch regelungstechnisch kompliziert und benötigt zum Betrieb eine Vielzahl an regeltechnischen Einrichtungen. Demgemäß erfordert sie einen beträchtlichen Investitionsaufwand. Weiters bringt es ein großes Maß an Produktionsunsicherheiten mit sich, da durch die große Anzahl von kontinuierlich eingreifenden Antriebsaggregaten bei Ausfall von einem Teil davon der Gesamtprozeß gestoppt wird und das Gießverfahren abgebrochen werden muß.The known system not only requires a complex construction, but is also complicated in terms of control technology and requires a large number of control technology for operation Facilities. Accordingly, it requires a considerable investment. Furthermore it brings with it a large degree of production uncertainty, because of the large number of continuously engaging drive units in the event of failure of part of it The entire process is stopped and the casting process has to be stopped.

Bei der bekannten Anlage ist keine Flexibilität hinsichtlich Produktqualität und Qualität der erzeugten Fertigungsprodukte gegeben. So muß beispielsweise der erste Verformungsschritt stets durchgeführt werden, da sonst eine zum Aufwickeln erforderliche Dünnheit des Produktes und somit eine Produktion nicht gewährleistet werden kann. Damit ist die bekannte Anlage für bestimmte Stahlqualitäten nicht einsetzbar. Weiters ist hinsichtlich der Qualität des Fertigproduktes eine gezielte und flexible Temperaturführung kaum möglich, insbesondere bei instationären Zuständen. Bei Ausfall des Wickelaggregates kommt zudem der Gesamtprozeß sofort zum Stillstand; dies schließt auch den Stillstand des Gießprozesses ein.In the known system there is no flexibility with regard to product quality and quality of the given manufacturing products. For example, the first deformation step always be carried out, otherwise a thinness of the Product and therefore production cannot be guaranteed. So that is the known System cannot be used for certain steel qualities. Furthermore, regarding the quality targeted and flexible temperature control of the finished product is hardly possible, especially in the case of transient conditions. If the winding unit fails, there is also the entire process immediately comes to a standstill; this also includes the standstill of the casting process a.

Eine ähnliche Vorrichtung, wie in der WO 92/00815 beschrieben ist, ist auch aus der EP-A 0 504 999 bekannt.A similar device, as described in WO 92/00815, is also known from the EP-A 0 504 999 is known.

Eine Anlage zur Herstellung eines Bandes in einer Dicke von 2 bis 25 mm ist aus der EP-B 0 286 862 bekannt. Bei dieser bekannten Anlage wird ein Stahlstrang durch Gießen von Schmelze in eine trichterförmige Durchlaufkokille gebildet und beim Durchlauf durch dieselbe bereits verformt. Der noch einen flüssigen Kern aufweisende Strang wird nach Austritt aus der Durchlaufkokille derart zusammengepreßt, daß es zu einer Verschweißung der inneren Wandungen der bereits verfestigten Strangschalen kommt. Hierdurch wird eine Dickenreduzierung auf eine Dicke von unter 25 mm erzielt. Diese bekannte Anlage läßt sich jedoch nur für ganz bestimmte Stahlqualitäten einsetzen, nämlich solche, die eine derartige Verformung knapp unterhalb der Durchlaufkokille zulassen.A system for producing a tape in a thickness of 2 to 25 mm is from the EP-B 0 286 862 known. In this known system, a steel strand is cast by casting Melt formed in a funnel-shaped continuous mold and as it passed through the same already deformed. The strand, which still has a liquid core, becomes after Exit from the continuous mold so compressed that there is a weld the inner walls of the strand shells that have already solidified. This will create a Thickness reduction to a thickness of less than 25 mm achieved. This known system can be However, only use it for very specific steel qualities, namely those that do Allow deformation just below the continuous mold.

Nachteilig ist hierbei weiters, daß die noch dünne Strangschale auf ihrem Weg durch die Kokille stark gequetscht wird, wobei es zu einer Faltenbildung und Überschiebungen der Strangschale kommen kann. Auch können bei der Relativbewegung zwischen der Kokillenkupferwand und der Strangschale flüssige exogene oder endogene nichtmetallische Bestandteile in die weiche Strangschale eingedrückt werden.Another disadvantage here is that the still thin strand shell on its way through the The mold is badly squeezed, causing wrinkling and overstretching of the Strand shell can come. Also, the relative movement between the Chill copper wall and the strand shell liquid exogenous or endogenous non-metallic Components are pressed into the soft strand shell.

Zusätzlich erhöhen sich durch die Verformung in der Kokille die Reibkräfte unkontrollierbar. Die trichterförmige Durchlaufkokille erlaubt keine gleichmäßige Strömungsverteilung, d.h. es kann durch den aus dem Tauchrohr austretenden Gießstrahl die ohnedies schon stark beanspruchte Strangschale an den kritischen Verformungsstellen durch Aufschmelzen geschwächt werden, was sich in erhöhtem Durchbruchsrisiko äußert. Ein weiterer Nachteil liegt in der sehr geringen Flexibilität hinsichtlich der Produktionskapazität und hinsichtlich der Ausnutzung des vollen Gießgeschwindigkeitsbereiches.In addition, the deformation in the mold increases the frictional forces uncontrollably. The funnel-shaped continuous mold does not allow an even flow distribution, i.e. it can by the pouring jet emerging from the dip tube already strong stressed strand shell at the critical deformation points by melting weakened, which manifests itself in increased risk of breakthrough. Another disadvantage lies in the very low flexibility in terms of production capacity and in terms of the utilization of the full casting speed range.

Aus der EP-B - 0 327 854 ist eine Anlage zum Walzen von auf einer Bandstranggießanlage gegossenen Vorbändern bekannt, wobei das gegossene Vorband in einem kontinuierlichen Arbeitsgang auf Walztemperatur gebracht und zum Auswalzen in die Fertigwalzstraße eingeführt wird.EP-B-0 327 854 describes a plant for rolling on a continuous strip casting plant cast pre-strips known, the cast pre-strip in a continuous Work step brought to the rolling temperature and rolled out into the finishing mill is introduced.

Um im Störfall in der Fertigwalzstraße oder in der Haspelanlage eine Produktionsunterbrechung zu vermeiden, ist es aus diesem Dokument bekannt, das gegossene Vorband in der Fertigwalzstraße alternativ zur Warmbandwalzung auf Grobblechdicke zu walzen, im Anschluß daran zu kühlen, querzuteilen und zu stapeln. Mit dieser bekannten Anlage ist es jedoch nicht möglich, ausgehend von einer relativ großen Strangdicke, dünne Bänder herzustellen.In the event of a malfunction in the finishing mill or in the coiler To avoid production interruptions, it is known from this document, the cast Support strip in the finishing mill as an alternative to hot strip rolling to heavy plate thickness rolling, then cooling, dividing and stacking. With this known However, plant is not possible, starting from a relatively large strand thickness, thin To produce tapes.

Die Erfindung bezweckt die Vermeidung der oben beschriebenen Nachteile und Schwierigkeiten und stellt sich die Aufgabe, eine Anlage zu schaffen, welche bei hoher Produktqualität die Herstellung möglichst dünner Bänder ermöglicht, wobei eine sehr hohe Betriebsflexibilität gegeben ist. Insbesondere soll das Stranggießen im Fall einer Störung an einer der Durchlaufkokille nachgeordneten Verformungsstufe fortgesetzt werden können.The invention aims to avoid the disadvantages and described above Difficulties and the task is to create a system that is at high Product quality enables the production of tapes as thin as possible, with a very high Operational flexibility is given. In particular, continuous casting should start in the event of a malfunction a deformation stage downstream of the continuous mold can be continued.

Diese Aufgabe wird bei einer Anlage der eingangs beschriebenen Art dadurch gelöst, daß

  • zum alternativen Herstellen eines warmgewalzten Bandes aus Stahl oder eines warmverformten Vorstreifens aus Stahl oder einer unverformten Bramme aus Stahl unterschiedliche Verformungsstufen aktivierbar bzw. deaktivierbar sind, wobei
  • zur Herstellung eines möglichst dünnen Bandes sämtliche Verformungsstufen in Summe aktiviert sind,
  • zur Herstellung eines Bandes mit etwas größerer Dicke nur die zweite und dritte Verformungsstufe einzeln oder in Summe aktiviert sind, und
  • zur Herstellung einer unverformten Bramme alle drei Verformungsstufen deaktiviert sind.
This object is achieved in a system of the type described above in that
  • for the alternative production of a hot-rolled steel strip or a hot-formed pre-strip made of steel or an undeformed steel slab, different deformation stages can be activated or deactivated, wherein
  • all deformation stages are activated in total to produce the thinnest possible strip,
  • for the production of a tape with a somewhat greater thickness only the second and third deformation stages are activated individually or in total, and
  • all three deformation stages are deactivated to produce an undeformed slab.

Bei der erfindungsgemäßen Anlage können Plattenkokillen mit planparallelen Wänden Verwendung finden. Dies hat in Verbindung mit einem Tauchrohr zur Folge, daß sich eine gleichmäßige Strangschale ausbildet. Diese wird in der Durchlaufkokille weder deformiert noch gequetscht, da sie einen durchlaufend gleichbleibenden Querschnitt aufweist. Der aus der Durchlaufkokille austretende Strang weist infolge der innerhalb der Durchlaufkokille stabilen Betriebsbedingungen (homogene Zustände, wie gleichmäßige Schmierung und gleichmäßige Kühlung) eine Strangschale in höchster Qualität auf, so daß das Durchbruchsrisiko minimiert ist und eine Verformung des noch einen flüssigen Kern aufweisenden Stranges ohne Durchbruchsrisiko möglich ist.In the system according to the invention, plate molds with plane-parallel walls can be used Find use. In connection with an immersion tube, this has the consequence that a forms even strand shell. This is neither deformed in the continuous mold still squeezed because it has a constant cross-section. The one out the strand emerging from the continuous mold is due to the inside of the continuous mold stable operating conditions (homogeneous conditions such as uniform lubrication and uniform cooling) on a strand shell of the highest quality, so that the Breakthrough risk is minimized and deformation of the still liquid core having strand is possible without the risk of breakthrough.

Die hohe Flexibilität der Anlage zeigt sich in der Erzielbarkeit von kleinen Warmbanddicken mit ein und derselben Anlage und mit der gleichen Anzahl von Walzgerüsten, u.zw. durch Verringerung der Vorstreifendicke entsprechend den Erfordernissen.The high flexibility of the system is evident in the fact that small hot strip thicknesses can be achieved with one and the same system and with the same number of roll stands, etc. by Reduction of the pre-strip thickness according to the requirements.

Die hohe Flexibilität der erfindungsgemäßen Anlage ermöglicht, daß vorzugsweise durch die ersten beiden Verfahrensstufen, einzeln oder gemeinsam angewandt, eine Reduzierung der Dicke des Stranges herab bis zu einer Dicke von 30 mm oder einer darüberliegenden Dicke durchgeführt wird. Somit weist das abgetrennte Strangstück eine Dicke von mindestens 30 mm auf, bevor es einer Weiterwalzung zugeführt wird. Diese Dicke kann im Falle des Ausschaltens der ersten beiden Verformungsstufen bis zur Gießdicke, d.h. bis vorzugsweise maximal 150 mm, insbesondere 100 mm, betragen.The high flexibility of the system according to the invention enables that preferably through first two process stages, applied individually or together, a reduction in Thickness of the strand down to a thickness of 30 mm or an overlying thickness is carried out. The separated strand piece thus has a thickness of at least 30 mm before it is fed to further rolling. This thickness can in the case of Switching off the first two deformation stages up to the casting thickness, i.e. until preferably a maximum of 150 mm, in particular 100 mm.

Vorzugsweise weist die erste Verformungsstufe hydraulisch gegeneinander anstellbare, die Verformung des Stranges bewirkende Rollen auf.The first deformation stage preferably has hydraulically adjustable against each other Rolls causing deformation of the strand.

Vorteilhaft ist zwischen der Trenneinrichtung und der dritten Verformungsstufe eine Einrichtung zur Temperatur-Homogenisierung der abgetrennten Strangstücke, wie ein Temperatur-Ausgleichsofen, vorgesehen, wobei zweckmäßig die Einrichtung zur Temperatur-Homogenisierung mit einer Speichereinrichtung zur Aufnahme mehrerer abgetrennter Strangstücke versehen ist.A is advantageous between the separating device and the third deformation stage Device for temperature homogenization of the separated strand pieces, such as a Temperature compensation furnace provided, the device for temperature homogenization expediently with a storage device for receiving several separated Strand pieces is provided.

Die Erfindung ist nachfolgend anhand einer ein Ausführungsbeispiel darstellenden Schemaskizze näher erläutert.The invention is based on an exemplary embodiment Schematic sketch explained in more detail.

Mit 1 ist eine Durchlaufkokille zum Stahlstranggießen bezeichnet, die einen durchlaufend gleichbleibenden Querschnitt aufweist und vorzugsweise als Plattenkokille ausgebildet ist. Mit dieser Durchlaufkokille können Gußstränge in einer Dicke 2 zwischen 60 und 150 mm, vorzugsweise in einer Dicke zwischen 60 und 100 mm (sogenannte Dünnbrammen), gegossen werden. Für Durchlaufkokillen dieser Dicke ist die Verwendung eines herkömmlichen Tauchrohres 3 möglich, wodurch sich stabile Betriebsbedingungen, was die Kühlung und Schmelzenverteilung betrifft, ergeben, so daß der die Durchlaufkokille 1 verlassende Strang 4 eine gleichmäßige und stabil ausgebildete Strangschale aufweist.1 with a continuous mold for steel casting is referred to, the one continuous has a constant cross section and is preferably designed as a plate mold. With this continuous mold, cast strands with a thickness 2 between 60 and 150 mm, preferably in a thickness between 60 and 100 mm (so-called thin slabs) will. For continuous molds of this thickness, the use of a conventional one Dip tube 3 possible, resulting in stable operating conditions, which cooling and Melt distribution concerns, so that the leaving the continuous mold 1 Strand 4 is a uniform and stable strand shell having.

Unterhalb der Durchlaufkokille 1, die vorzugsweise als gerade Kokille ausgebildet ist, ist zur Bildung einer ersten Verformungsstufe ein Vertikalstützgerüst 5 angeordnet, das hydraulisch (- wie durch Druckmittelzylinder 6 angedeutet -) an die Strangschale anstellbare Stützrollen 7 aufweist. Dieses Vertikalstützgerüst ist in zwei Teilsegmente 5', 5'' unterteilt, so daß mit jedem reilsegment unterschiedliche Kräfte auf den Strang 4 aufbringbar sind. Mit Hilfe dieses Vertikalstützgerüstes 5 wird eine sogenannte "weiche Reduktion" des erstarrenden Stranges 4 mit noch flüssigem Kern als erste Verformungsstufe durchgeführt, wobei die Belastung der Strangschale in der Zwei-Phasen-Grenzschicht unter einer die Endproduktqualität beeinflussenden Grenzdehnung bleibt. Mit Hilfe dieser sogenannten "weichen Reduktion" läßt sich eine Verringerung der Strangdicke um bis zu 30 mm ohne Qualitätseinbußen erzielen. Anschließend an das Vertikalsegment 5 sind noch weitere Bogensegmente 8, 9 vorgesehen, die gegebenenfalls ebenfalls hydraulisch anstellbare Stützrollen 7 aufweisen.Below the continuous mold 1, which is preferably straight Mold is designed to form a first Deformation stage arranged a vertical support structure 5, the hydraulic (- as indicated by pressure cylinder 6 -) the strand shell has adjustable support rollers 7. This Vertical support frame is divided into two sub-segments 5 ', 5' ', so that with each rope segment different forces on the Strand 4 can be applied. With the help of this Vertical support frame 5 becomes a so-called "soft reduction" of the solidifying strand 4 with the liquid core as the first Deformation stage performed, the load on the Strand shell in the two-phase boundary layer under one Ultimate elongation influencing end product quality remains. With With the help of this so-called "soft reduction" one can Reduction of the strand thickness by up to 30 mm without Achieve quality losses. Subsequent to the vertical segment 5, further arc segments 8, 9 are provided, which optionally also hydraulically adjustable support rollers 7 exhibit.

Nach Umlenkung des Stranges 4 in die Horizontale wird dieser durch ein einfaches (gegebenenfalls mehrstufiges) Verformungsgerüst 10 hindurchgeführt, das zur Verformung des nunmehr bereits durcherstarrten Stranges 4 als zweite Verformungsstufe (zweiter Verformungsschritt) aktiviert werden kann. Damit wird eine Dicke 12 eines Vorstreifens entsprechend der erforderlichen Warmbanddicke mit einer Stichabnahme bis zu maximal 60 % (z.B.: 70 auf 30 mm) erreicht.After the strand 4 has been deflected into the horizontal, it becomes through a simple (possibly multi-stage) Deformation scaffold 10 passed, which is used to deform the now already solidified strand 4 as the second Deformation stage (second deformation step) can be activated can. This corresponds to a thickness 12 of a pre-strip the required hot strip thickness with a stitch acceptance up to reached a maximum of 60% (e.g. 70 to 30 mm).

Vor Durchtritt durch das Verformungsgerüst 10 wird der Strang 4 einer Entzunderung in einer Entzunderungseinrichtung 11 unterzogen, die eine weiche Entzunderung mittels rotierender Entzunderungsdüsen sowie mit speziellen Wasserabstreifern für das Entzunderungswasser ermöglicht. Before it passes through the deformation framework 10, the strand 4 descaling in a descaling device 11 subjected to soft descaling by means of rotating Descaling nozzles and with special water wipers for the descaling water enables.

Die Dickenvorreduktion erlaubt vor dem Temperaturausgleich eine Beeinflussung der Endproduktqualität insbesondere für mikrolegierte Stähle, welche üblicherweise durch entsprechende Stichabnahmen über der Rekristallisations-Stop-Temperatur, durch Ausscheidungs- und Rekristallisationsvorgänge beeinflußt werden.The thickness pre-reduction allows one before the temperature compensation Influencing the end product quality especially for microalloyed steels, which are usually replaced by appropriate Stitch decreases above the recrystallization stop temperature Precipitation and recrystallization processes are influenced.

Nach der Vorreduktion weist der Strang 4 vorzugsweise das Format eines Vorstreifens, also eines (nicht wickelbaren) Vormaterials zur Bandherstellung auf. Die Dicke 12 beträgt vorzugsweise 30 mm und mehr.After the pre-reduction, the strand 4 preferably has the format a roughing strip, i.e. a (non-wrapable) raw material for tape production. The thickness 12 is preferably 30 mm and more.

Dem Verformungsgerüst 7 nachgeordnet ist eine Trenneinrichtung 13 zur Querteilung des Gußstranges 4 wobei der je nach Anforderungen an das Endprodukt in der Stranggießanlage verformte Strang 4 mittels einer hydraulischen Schere in den Coilgewichten entsprechende Längen getrennt wird.A separating device is arranged downstream of the deformation framework 7 13 for the transverse division of the cast strand 4, which depends on Requirements for the end product in the continuous caster deformed strand 4 using hydraulic scissors in the Coil weights corresponding lengths are separated.

Die dabei entstehenden Strangstücke 14 mit 30 bis 150 mm Dicke (letzteres im Falle eines unverformten Stranges maximaler Dicke) laufen dann in eine Transport- und Homogenisierungseinrichtung, z.B. einen Rollenherdofen 15 ein, die je nach Brammentemperatur auch in der Lage ist, eine Dünnbramme aufzuheizen. In diesem Rollenherdofen 15 wird der gesamte Querschnitt des Strangstückes 14, insbesondere deren Kanten, auf eine gleichmäßige Temperatur gebracht. In diesem Ofenaggregat 15 können die Strangstücke gepuffert (gespeichert, z.B. durch Stapeln) werden, d.h. im Falle von kurzzeitigen Störungen in einem Teil der Anlage werden Dünnbrammen bzw. Strangstücke 14 aufgenommen, bis es zur Wiederaufnahme des Herstellungsprozesses kommt.The resulting strand pieces 14 with a thickness of 30 to 150 mm (the latter in the case of an undeformed strand of maximum thickness) then run into a transport and homogenization facility, e.g. a roller hearth furnace 15, depending on the slab temperature is also able to heat a thin slab. In this Roller hearth furnace 15 is the entire cross section of the strand piece 14, in particular their edges, to a uniform temperature brought. In this furnace unit 15, the strand pieces can are buffered (stored, e.g. by stacking), i.e. in the In the event of brief malfunctions in a part of the facility Thin slabs or strand pieces 14 added until it Resumption of the manufacturing process is coming.

Anschließend an den Rollenherdofen 15 ist eine weitere Trenneinrichtung, die als hydraulische Schere 16 ausgebildet ist, vorgesehen, die im Falle einer Störung in der nachfolgenden als dritte Verformungsstufe fungierenden Walzwerksstufe 17 aktiviert wird. Vor Eintritt in die Walzwerkstufe 17 erfolgt eine Entzunderung in einer Entzunderungseinrichtung 18, die vorzugsweise eine Rotorentzunderung mit geringem Wasserverbrauch und daraus folgendem geringem Temperaturabfall bei hervorragender Entzunderungswirkung ist.Following the roller hearth furnace 15 is another Separating device, which is designed as hydraulic scissors 16 is provided, in the event of a malfunction in the following Rolling mill stage 17 functioning as the third deformation stage is activated. Before entering rolling mill stage 17 descaling in a descaling device 18, the preferably a rotor descaling with low water consumption and the resulting low temperature drop excellent descaling effect.

Nachfolgend erfolgt die Walzung der Strangstücke in der Walzwerksstufe 17, die aus Fertiggerüsten 19 besteht. Die Anzahl der Fertiggerüste 19 der Fertigstraße ergibt sich aus der Dicke 12 der Strangstücke 14 nach dem Abtrennen vom Gußstrang 4 und der zu walzenden Banddicke 20. Die Strangstücke 14 erfahren keine γ-α-Umwandlung bis zu jenem Zeitpunkt im Herstellungsprozeß, zu dem die γ-α-Umwandlung aufgrund materialkundlicher Vorgänge zur Errreichung der geforderten mechanisch-technologischen Kennwerte sowie der Zähigkeit für die jeweilig hergestellte Stahlsorte erforderlich ist.Subsequently, the strand pieces are rolled in the Rolling mill stage 17, which consists of finishing stands 19. The number of the finishing stands 19 of the finishing train results from the thickness 12 of the strand pieces 14 after separation from the cast strand 4 and of the strip thickness to be rolled 20. Experience the strand pieces 14 no γ-α conversion until that point in time Manufacturing process to which the γ-α conversion is due material science processes to achieve the required mechanical-technological characteristics and toughness for the steel grade is required.

Für kleinere Kapazitäten kann die Fertigstraße durch ein Steckelwalzwerk ersetzt werden. Diese Möglichkeit wird vorzugsweise zur Herstellung von Warmbändern aus rostfreiem Stahl oder Sonderstahl aus Dünnbrammen herangezogen.For smaller capacities, the finishing train can be Steckel rolling mill to be replaced. This possibility will preferably for the production of hot strips made of stainless steel Steel or special steel made from thin slabs.

Nach Austritt aus der Walzwerksstufe 17 wird das gewalzte Strangstück 14 in einer Kühlstrecke 21 (Laminarkühlstrecke) auf Haspeltemperatur gekühlt und mittels einer Haspeleinrichtung 22 zu einem Bund 23 gewickelt. Das fertiggewalzte Band ist mit 24 bezeichnet.After leaving the rolling mill stage 17, the rolled Strand piece 14 in a cooling section 21 (laminar cooling section) Cooled reel temperature and by means of a reel device 22 wound into a bundle 23. The finished rolled strip is 24 designated.

Die erfindungsgemäß vorgesehenen Kombinationsmöglichkeiten der drei Verformungsstufen erhöhen die gesamte Anlagenflexibilität, da auch ohne "weicher Reduktion" (erste Verformungsstufe)mit flüssigem Sumpf bzw. Walzung nach Durcherstarrung (zweiter Verformungsschritt) der Gesamtprozeß ohne Qualitäts- und Leistungseinbußen im Betrieb bleibt. So ist beispielsweise bei der vorliegenden Anlage die Aktivierung sämtlicher Verformungsstufen nur für ca. 15 bis 20 % der Gesamtproduktion notwendig, nämlich für jenen Teil der Produktion, der auf eine Enddicke gewalzt werden soll, die mit der Fertigstraße andernfalls nicht erreichbar ist. The possible combinations of the three deformation levels increase the overall system flexibility, because without "soft reduction" (first deformation stage) liquid sump or rolling after solidification (second Deformation step) the overall process without quality and Performance loss in operation remains. For example, at the activation of all of the present system Deformation levels only for approx. 15 to 20% of the total production necessary, namely for that part of the production which is based on a Final thickness to be rolled with the finishing train otherwise not reachable.

Weiters erlaubt die Anordnung eine Energieoptimierung des Gesamtprozesses durch Ausbalancierung von Gießdicke (D) und Enddicke (P) mit dem Ziel, die größtmögliche Enthalpie der Strangstücke in den Rollenherdofen 15 mitzubringen. Erreicht wird das durch ein dynamisches Kühlregime mittels Luft-Wasserdüsen zur Erhöhung der Austrittstemperatur des Stranges sowie der "weichen Entzunderung".Furthermore, the arrangement allows the energy to be optimized Overall process by balancing the casting thickness (D) and Final thickness (P) with the aim of achieving the greatest possible enthalpy Bring strand pieces in the roller hearth furnace 15. Reached this is achieved through a dynamic cooling regime using air-water jets to increase the exit temperature of the strand as well as "soft descaling".

In der erfindungsgemäß vorgeschlagenen Anlage entfallen die üblicherweise ablaufenden Gefügeänderungen, da die Stahltemperatur nicht unter die Umwandlungstemperatur Ar3 sinkt. Die bei spezifischen Stahlgüten nicht ablaufenden, aber erforderlichen Vorgänge für ein feines und homogenes Gefüge werden durch die vorgesehenen Anlagenteile mit Hilfe der Vorverformung kompensiert. Damit ergeben sich vorteilhaft neue Perspektiven zur Herstellung mikrolegierter Stähle mit Hilfe der Dünnbrammentechnologie.In the system proposed according to the invention, the structural changes that usually take place are eliminated since the steel temperature does not drop below the transformation temperature Ar 3 . The processes required for a fine and homogeneous structure, which do not take place in the case of specific steel grades, are compensated for by the proposed system parts with the help of the pre-deformation. This advantageously opens up new perspectives for the production of microalloyed steels with the help of thin slab technology.

Die Vielfältigkeit der erfindungsgemäßen Anlage ist in nachstehender Tabelle dokumentiert. In dieser Tabelle sind in horizontalen Zeilen für unterschiedliche Stahlqualitäten die kleinsten erzielbaren Banddicken bei einer Gießdicke von 70 mm angegeben, wobei zusätzlich angegeben ist, welche der beiden ersten Verformungsstufen aktiviert ist. Die erste Verformungsstufe - mit einer Dickenreduktion von 10 mm - ist mit I und die zweite Verformungsstufe - mit einer Dickenreduktion von 20 mm - mit II bezeichnet. Ist die entsprechende Verformungsstufe aktiviert, ist dies mit einem X, ist sie nicht aktiviert, ist dies mit einer 0 angemerkt. Ein N deutet darauf hin, daß diese Banddicken allein durch die erfindungsgemäßen Verfahrensstufen nicht hergestellt werden sollen. Die dritte Verformungsstufe (Walzwerksstufe 17) ist mit fünf bis sieben Fertiggerüsten 19 für die in der Tabelle angegebenen Abmessungsbereiche stets in Betrieb.

Figure 00090001
Figure 00100001
The diversity of the system according to the invention is documented in the table below. In this table, the smallest achievable strip thicknesses with a casting thickness of 70 mm are given in horizontal lines for different steel qualities, whereby it is additionally indicated which of the first two deformation stages is activated. The first deformation stage - with a thickness reduction of 10 mm - is designated I and the second deformation stage - with a thickness reduction of 20 mm - with II. If the corresponding deformation level is activated, this is marked with an X, if it is not activated, it is marked with a 0. An N indicates that these strip thicknesses should not be produced solely by the process steps according to the invention. The third deformation stage (rolling mill stage 17) is always in operation with five to seven finishing stands 19 for the dimensional ranges specified in the table.
Figure 00090001
Figure 00100001

Claims (4)

Stranggießanlage mit einer Durchlaufkokille (1) mit einem durchlaufend gleichbleibenden Querschnitt einer Bramme, einer ersten Verformungsstufe (5 bis 9), die im Bereich unterhalb der Kokille, in dem der Strang (4) einen flüssigen Kern aufweist, vorgesehen ist, einer zweiten Verformungsstufe (10), die in dem Bereich, in dem der Strang (4) bereits durcherstarrt ist, vorgesehen ist, einer dritten Verformungsstufe (17), die von einem ein- oder mehrgerüstigen Warmwalzgerüst (19) gebildet ist, und einer zwischen der zweiten und der dritten Verformungsstufe angeordneten Trenneinrichtung (13) zur Herstellung von vom Strang (4) abgetrennten Strangstücken (14), dadurch gekennzeichnet, daß zum alternativen Herstellen eines warmgewalzten Bandes (24) aus Stahl oder eines warmverformten Vorstreifens (14) aus Stahl oder einer unverformten Bramme aus Stahl unterschiedliche Verformungsstufen aktivierbar bzw. deaktivierbar sind, wobei zur Herstellung eines möglichst dünnen Bandes (24) sämtliche Verformungsstufen in Summe aktiviert sind, zur Herstellung eines Bandes (14) mit etwas größerer Dicke nur die zweite und dritte Verformungsstufe einzeln oder in Summe aktiviert sind, und zur Herstellung einer unverformten Bramme alle drei Verformungsstufen deaktiviert sind. Continuous caster with a continuous mold (1) with a constant cross-section of a slab, a first deformation stage (5 to 9), which is provided in the area below the mold, in which the strand (4) has a liquid core, a second deformation stage (10), which is provided in the area in which the strand (4) has already solidified, a third deformation stage (17), which is formed by a single or multi-stand hot rolling stand (19), and a separating device (13) arranged between the second and the third deformation stage for producing strand pieces (14) separated from the strand (4), characterized in that For the alternative production of a hot-rolled strip (24) from steel or a hot-formed pre-strip (14) from steel or an undeformed slab from steel, different deformation stages can be activated or deactivated, whereby in order to produce the thinnest possible band (24), all deformation stages are activated in total, for the production of a band (14) with a somewhat greater thickness only the second and third deformation stages are activated individually or in total, and all three deformation stages are deactivated to produce an undeformed slab. Anlage nach Anspruch 1, dadurch gekennzeichnet, daß die erste Verformungsstufe (5 bis 9) hydraulisch gegeneinander anstellbare, die Verformung des Stranges (4) bewirkende Rollen (7) aufweist.Installation according to claim 1, characterized in that the first deformation stage (5th to 9) hydraulically adjustable against each other, causing the deformation of the strand (4) Rollers (7). Anlage nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß zwischen der Trenneinrichtung (13) und der dritten Verformungsstufe (17) eine Einrichtung (15) zur Temperatur-Homogenisierung der abgetrennten Strangstücke, wie ein Temperatur-Ausgleichsofen, vorgesehen ist.Installation according to claim 1 or 2, characterized in that between the Separating device (13) and the third deformation stage (17) a device (15) for Temperature homogenization of the separated strand pieces, such as a temperature compensation furnace is provided. Anlage nach Anspruch 3, dadurch gekennzeichnet, daß die Einrichtung (15) zur Temperatur-Homogenisierung mit einer Speichereinrichtung zur Aufnahme mehrerer abgetrennter Strangstücke (14) versehen ist.System according to claim 3, characterized in that the device (15) for Temperature homogenization with one storage device to accommodate several separated strand pieces (14) is provided.
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ZA941032B (en) 1994-08-25
BR9400567A (en) 1994-09-27
CA2115489A1 (en) 1994-08-17
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KR100191298B1 (en) 1999-06-15
EG20366A (en) 1999-01-31
ATA29293A (en) 1994-04-15
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DE59409960D1 (en) 2001-12-20
US5810069A (en) 1998-09-22
TW325421B (en) 1998-01-21
US5964275A (en) 1999-10-12
AT398396B (en) 1994-11-25
AU675099B2 (en) 1997-01-23
EP0853987B1 (en) 2001-11-14
AU5511794A (en) 1994-08-18
CN1092343A (en) 1994-09-21
DE59408376D1 (en) 1999-07-15
EP0611610A1 (en) 1994-08-24
JP3157676B2 (en) 2001-04-16
EP0611610B1 (en) 1999-06-09

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