EP1414596B1 - Hot rolling installation - Google Patents

Hot rolling installation Download PDF

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Publication number
EP1414596B1
EP1414596B1 EP02794551A EP02794551A EP1414596B1 EP 1414596 B1 EP1414596 B1 EP 1414596B1 EP 02794551 A EP02794551 A EP 02794551A EP 02794551 A EP02794551 A EP 02794551A EP 1414596 B1 EP1414596 B1 EP 1414596B1
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EP
European Patent Office
Prior art keywords
rolling
stand
strip
rolled
roll
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Expired - Lifetime
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EP02794551A
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German (de)
French (fr)
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EP1414596A2 (en
Inventor
Dieter Rosenthal
Peter Sudau
Joachim Hafer
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SMS Siemag AG
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SMS Demag AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • 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
    • B21B1/466—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 non-continuous process, i.e. the cast 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
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B2013/003—Inactive rolling stands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/02—Austenitic rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
    • B21B45/08—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing hydraulically
    • 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

Definitions

  • the invention relates to a hot rolling mill according to the preamble of claim (see for example DE-A-44 02 402) for rolling thin hot strip for a wide range of different difficult to form Material and method for operating such a hot rolling mill.
  • Hot rolling mills which follow Continuous casting and equalizing ovens are arranged.
  • Hot rolling mills allow hot strips to be formed with varying degrees of difficulty
  • Roll materials with thicknesses of 1.5 to 1.2 mm, with the tape at the exit the last rolling stand still austenitic structure has.
  • the belt speed at the exit of the last rolling mill is also easy constructed, the hot rolling following units such.
  • Watzbanddicke is at least with these roads not possible for easily formed materials.
  • the average temperature of the band at the output of the last framework the hot strip mill the temperature required for austenitic rolling (about 860 ° C) do not fall below
  • the speed at the exit of the last stand of the hot strip mill approx. 12.5 m / sec. do not exceed, because the hot strip otherwise with simple means on the Outlet roller table no longer run properly and then reeled can be.
  • reels that wrap around at rotational speeds of over 15 m / sec. have to be accelerated very expensive, expensive and difficult to control.
  • Hot strip mills When rolling difficult to form material can be with the seven-stand Hot strip mills can reach even smaller thicknesses than 1.2 mm, since Due to the large rolling work austenitic structure behind the last mill stand even at lower speeds is still encountered.
  • the hot rolling plant is for easily deformable material with small final thicknesses, however not suitable.
  • the drive elements of the hot rolling mill become more stressed at higher speeds and wear out faster, so that elaborate drive components, reel and scissors and much more precise and dynamic control mechanisms are provided need to ensure the desired band qualities.
  • the invention is based on the object, a hot rolling mill and a Method for operating the hot rolling mill so to design. that after the rolling process at initial thicknesses below 1.2 mm, in particular less than 1 mm even when rolling easily deformable materials still strip temperatures which ensure austenitic rolling and yet the exit velocity of the rolling stock a speed of 15 m / sec. Not exceeds, so that there are easier manageable workflows, the Wear and tear of the system is reduced and the costs are also simple Aggregates can be kept low.
  • the invention will be explained in more detail with reference to a drawing.
  • the drawing shows a hot rolling mill for material that is difficult to form can be operated in each case so that regardless of the material used and despite the different conditions for everyone Materials final rolling temperatures occur at the last stand, which is an austenitic Rolls guaranteed and speeds less than about 15m / sec. be achieved.
  • the hot rolling plant consists of a Dünnbrammeng discernstrom 1 whose Strand guide is so adjustable that thin slab thicknesses of about 45 to 70 mm be achieved at the output of Dünnbrammeng discernstrom 1.
  • the endless cast Thin slabs are divisible by a pair of scissors 2. You can do that Set slab lengths equal to the length of a finished rolled coil or a correspond to multiple of them.
  • the sliced slabs are in a roller hearth furnace 3, which serves the temperature compensation at a temperature e.g. 1150 ° C held.
  • the roller hearth furnace 3 is followed by a pair of scissors. 4 which is only used in the event of an accident.
  • the one seven-stand rolling mill 7 with the rolling sizes F1 to F7 follows.
  • a cooling section 8 is provided, which is in the strip running direction a flying shears 9 connects, which in the case of semi-endless or Continuous rolling is used.
  • the hot rolling mill ends with two reels 10, which may also be designed as a Rotorhaspler altematively.
  • an intermediate scaffolding device 6 arranged between the rolling stand F1 and the rolling stand F2 .
  • the thin slab caster will be used 1 adjusted so that depending on the desired final thickness and Casters production slabs with thicknesses between 45 and 70 mm preferably 55 mm application. All seven scaffolds will be F1 to F7 hired.
  • the scaffolding descaling device 6 is inactive. At this Driving style can be controlled by the high rolling forces and in the to be rolled, hard-to-formate material to be introduced large work rolled strip thicknesses at Exit of the rolling stand F7 can reach below 1 mm whereby the speed of about 15 m / sec. is not exceeded and yet rolled strip with Austenitic structure is present.
  • the thin slab caster 1 When rolling easily deformable material with a final thickness of less than 1 mm the thin slab caster 1 on thin slab thicknesses between 45 and 50 mm.
  • the mill stand F1 is either inactive or is one Smoothing made with a small decrease.
  • the smoothing effect causes the Slab surface is smoother, so that behind the tinder scrubber 5 a can build a more uniform scale layer.
  • the active scaffolding descaling device 6 makes it easier to remove the newly formed scale. That less descaling agent is applied to the slabs, as if the scaffold F1 were not set for smoothing.
  • the scaffolds F2 to F7 are usually made slightly stronger than in the driving style, in which all seven scaffolding are employed. By operating only the stands F2 to F7 become lower end roll speeds reached. Due to the lower inlet slab thickness and the stronger Setting up the scaffolds F2 to F7 will nevertheless be finish rolling thicknesses below 1 mm achieved, wherein the rolling temperature in the austenitic microstructure having.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Vending Machines For Individual Products (AREA)
  • Lubricants (AREA)
  • Fats And Perfumes (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Cereal-Derived Products (AREA)

Abstract

The layout combines a caster (1) for endless thin slab which is then sheared (2) to finish-rolled coil length or lengths. The layout includes a roller-hearth furnace (3) to heat-treat the lengthed slabs followed by a descaler washer (5) and seven-stand roll train (7). A second descaler (6) is placed between first (F1) and second (F2) stands of the train which terminates in a cooling sector (8) and shear (9) to divide up the semi-endless rolled strip for coil winches (10). Strand guidance is adjustable or again the slab caster is followed by a primary stand to reduce slab thickness. An induction heater should be provided between stands (F1-F7).

Description

Die Erfindung betrifft eine Warmwalzanlage gemäß dem Obergriff des Anspruchs (siehe z.B. DE-A-44 02 402) zum Walzen von dünnem Warmband für ein breitgefächertes Sortiment von unterschiedlich schwer umformbarem Material sowie Verfahren zum Betreiben einer derartigen Warmwalzanlage.The invention relates to a hot rolling mill according to the preamble of claim (see for example DE-A-44 02 402) for rolling thin hot strip for a wide range of different difficult to form Material and method for operating such a hot rolling mill.

Es sind siebengerüstige Warmbandstraßen bekannt, die im Anschluss an Stranggießeinrichtungen und Ausgleichsöfen angeordnet sind. Mit derartigen Warmwalzanlagen lassen sich Warmbänder unterschiedlich schwer umformbaren Materials mit Dicken von 1,5 bis 1,2 mm walzen, wobei das Band am Ausgang des letzten Walzgerüsts noch austenitisches Gefüge aufweist. Die Bandgeschwindigkeit am Ausgang des letzten Walzgerüstes ist auch mit einfach aufgebauten, der Warmwalzanlage folgenden Aggregaten wie z. B. einer Schere und Haspeln beherrschbar.There are known seven-stand hot strip mills, which follow Continuous casting and equalizing ovens are arranged. With such Hot rolling mills allow hot strips to be formed with varying degrees of difficulty Roll materials with thicknesses of 1.5 to 1.2 mm, with the tape at the exit the last rolling stand still austenitic structure has. The belt speed at the exit of the last rolling mill is also easy constructed, the hot rolling following units such. B. a pair of scissors and reels manageable.

Eine weitere Absenkung der Watzbanddicke ist mit diesen Straßen zumindest für leicht umformbare Materialien nicht möglich. Dafür gibt es mehrere Gründe: einerseits soll die mittlere Temperatur des Bandes am Ausgang des letzten Gerüsts der Warmbandstraße die zum austenitischen Walzen erforderliche Temperatur (ca. 860°C) nicht unterschreiten, andererseits soll die Geschwindigkeit am Ausgang des letzten Gerüstes der Warmbandfertigstraße ca. 12,5 m/sec. nicht übersteigen, da das Warmband ansonsten mit einfachen Mitteln auf dem Auslaufrollgang nicht mehr einwandfrei geführt und anschließend gehaspelt werden kann. Weiterhin sind Haspel, die zum Anwickeln auf Umlaufgeschwindigkeiten von über 15 m/sec. beschleunigt werden müssen sehr aufwendig, teuer und schwer regelbar.A further reduction in the Watzbanddicke is at least with these roads not possible for easily formed materials. There are mutliple reasons for this: on the one hand, the average temperature of the band at the output of the last framework the hot strip mill the temperature required for austenitic rolling (about 860 ° C) do not fall below, on the other hand, the speed at the exit of the last stand of the hot strip mill approx. 12.5 m / sec. do not exceed, because the hot strip otherwise with simple means on the Outlet roller table no longer run properly and then reeled can be. Furthermore, reels that wrap around at rotational speeds of over 15 m / sec. have to be accelerated very expensive, expensive and difficult to control.

Soll leicht umformbares Material im austenitischen Bereich zu Dicken gewalzt werden, die unter 1,2 mm, insbesondere unter 1 mm liegen, ergeben sich bei diesen bekannten Anlagen Auslaufgeschwindigkeiten aus dem letzten Gerüst, die über 15 m/sec. liegen. Werden langsamere Auslaufgeschwindigkeiten eingestellt, so wird im letzten Gerüsten bereits die zum austenitischen Walzen erforderliche Bandtemperatur unterschritten, d. h. es wird nicht mehr austenitisch gewalzt.In the austenitic area, easily formed material should be rolled to thicknesses which are less than 1.2 mm, in particular less than 1 mm, add up these known systems exit speeds from the last frame, over 15 m / sec. lie. If slower exit speeds are set, so in the last framework already required for austenitic rolling Band temperature fell below, d. H. it does not become austenitic anymore rolled.

Beim Walzen von schwer umformbarem Material lassen sich mit den siebengerüstigen Warmbandstraßen auch kleinere Dicken als 1,2 mm erreichen, da durch die große Walzarbeit austenitisches Gefüge hinter dem letzten Walzgerüst auch bei kleineren Geschwindigkeiten noch angetroffen wird. Die Warmwalzanlage ist für leicht umformbares Material mit kleinen Enddicken jedoch nicht geeignet.When rolling difficult to form material can be with the seven-stand Hot strip mills can reach even smaller thicknesses than 1.2 mm, since Due to the large rolling work austenitic structure behind the last mill stand even at lower speeds is still encountered. The hot rolling plant is for easily deformable material with small final thicknesses, however not suitable.

Es ist bereits bekannt, derartige siebengerüstige Walzstraßen mit einer niedrigen Geschwindigkeit anzufahren und nach Aufbau des Zuges durch den Haspel die komplette Anlage zu beschleunigen. Das während der Beschleunigungsphase gewalzte Band ist oft Ausschuss, so dass derartige Anlagen uneffektiv arbeiten.It is already known, such a seven-stand rolling mills with a low Driving speed and after construction of the train through the reel to accelerate the entire system. This during the acceleration phase Rolled strip is often broke, making such systems ineffective work.

Hinzu kommt, dass insbesondere die Antriebselemente der Warmwalzanlage bei höheren Geschwindigkeiten stärker beansprucht werden und schneller verschleißen, so dass aufwendige Antriebskomponenten, Haspel und Schere und erheblich exaktere und dynamischere Regelmechanismen vorgesehen werden müssen, um die gewünschten Bandqualitäten zu gewährleisten.In addition, in particular, the drive elements of the hot rolling mill become more stressed at higher speeds and wear out faster, so that elaborate drive components, reel and scissors and much more precise and dynamic control mechanisms are provided need to ensure the desired band qualities.

Der Erfindung liegt die Aufgabe zugrunde, eine Warmwalzanlage sowie ein Verfahren zum Betreiben der Warmwalzanlage so auszugestalten. dass nach dem Walzvorgang bei Ausgangsdicken unter 1,2 mm, insbesondere unter 1 mm auch beim Walzen von leicht umformbaren Materialien noch Bandtemperaturen vorliegen, die ein austenitisches Walzen gewährleisten und dennoch die Austrittsgeschwindigkeit des Walzgutes eine Geschwindigkeit von 15 m/sec. nicht übersteigt, so dass sich leichter beherrschbare Arbeitsabläufe ergeben, der Verschleiss der Anlage verringert wird und auch die Kosten mit einfach aufgebauten Aggregaten niedrig gehalten werden können.The invention is based on the object, a hot rolling mill and a Method for operating the hot rolling mill so to design. that after the rolling process at initial thicknesses below 1.2 mm, in particular less than 1 mm even when rolling easily deformable materials still strip temperatures which ensure austenitic rolling and yet the exit velocity of the rolling stock a speed of 15 m / sec. Not exceeds, so that there are easier manageable workflows, the Wear and tear of the system is reduced and the costs are also simple Aggregates can be kept low.

Zur Lösung dieser Aufgabe wird eine Warmwalzanlage mit den Merkmalen des Anspruchs 1 vorgeschlagen. Mit dieser Walzanlage lassen sich Warmbänder unterschiedlich schwerer Verformbarkeit ohne weiteres bis auf Dicken von ca. 1,2 mm walzen. Aber auch Walzbanddicken unter 1,2 mm, insbesondere unter 1 mm lassen sich durch die Kombination der erfindungsgemäßen Merkmale für unterschiedlich schwer umformbare Materialien mit vertretbarem Aufwand walzen.To solve this problem is a hot rolling mill with the characteristics of Proposed claim 1. With this rolling mill can be hot strips different degrees of deformability readily to thicknesses of approx. 1.2 mm rolling. But also rolled strip thicknesses below 1.2 mm, especially below 1 mm can be achieved by the combination of the features according to the invention rolling materials of varying thickness with reasonable effort.

Die Erfindung wird anhand einer Zeichnung näher erläutert. Die Zeichnung zeigt eine Warmwalzanlage, die für unterschiedlich schwer umformbares Material jeweils so betrieben werden kann, dass unabhängig vom eingesetzten Material und trotz der sich damit einstellenden unterschiedlichen Bedingungen für alle Materialien Endwalztemperaturen am letzten Gerüst auftreten, die ein austenitisches Walzen gewährleistet und Geschwindigkeiten kleiner als ca. 15m/sec. erreicht werden.The invention will be explained in more detail with reference to a drawing. The drawing shows a hot rolling mill for material that is difficult to form can be operated in each case so that regardless of the material used and despite the different conditions for everyone Materials final rolling temperatures occur at the last stand, which is an austenitic Rolls guaranteed and speeds less than about 15m / sec. be achieved.

Die Warmwalzanlage besteht aus einer Dünnbrammengießanlage 1 deren Strangführung so regelbar ist, dass Dünnbrammendicken von ca. 45 bis 70 mm am Ausgang der Dünnbrammengießanlage 1 erreicht werden. Die endlos gegossenen Dünnbrammen sind durch eine Schere 2 teilbar. Dabei lassen sich Brammenlängen einstellen, die der Länge eines fertig gewalzten Coils oder einem mehrfachen davon entsprechen. Die geschnittenen Brammen werden in einem Rollenherdofen 3, der dem Temperaturausgleich dient auf einer Temperatur z.B. 1150°C gehalten. Dem Rollenherdofen 3 schließt sich eine Schere 4 an, die nur im Falle einer Havarie zur Anwendung kommt.The hot rolling plant consists of a Dünnbrammengießanlage 1 whose Strand guide is so adjustable that thin slab thicknesses of about 45 to 70 mm be achieved at the output of Dünnbrammengießanlage 1. The endless cast Thin slabs are divisible by a pair of scissors 2. You can do that Set slab lengths equal to the length of a finished rolled coil or a correspond to multiple of them. The sliced slabs are in a roller hearth furnace 3, which serves the temperature compensation at a temperature e.g. 1150 ° C held. The roller hearth furnace 3 is followed by a pair of scissors. 4 which is only used in the event of an accident.

Hinter dem Rollenherdofen 3 schließt sich ein Zunderwäscher 5 an, dem eine siebengerüstige Walzstraße 7 mit den Walzgrößen F1 bis F7 folgt. Am Ausgang der Walzstraße 7 ist eine Kühlstrecke 8 vorgesehen, der sich in Bandlaufrichtung eine fliegende Schere 9 anschließt, welche im Falle des Semi-endlos- bzw. Endloswalzens eingesetzt wird. Die Warmwalzanlage endet mit zwei Haspeln 10, die auch altemativ als ein Rotorhaspler ausgebildet sein können.Behind the roller hearth furnace 3 is followed by a tinder scrubber 5, the one seven-stand rolling mill 7 with the rolling sizes F1 to F7 follows. At the exit the rolling train 7 is a cooling section 8 is provided, which is in the strip running direction a flying shears 9 connects, which in the case of semi-endless or Continuous rolling is used. The hot rolling mill ends with two reels 10, which may also be designed as a Rotorhaspler altematively.

Zwischen dem Walzgerüst F1 und dem Walzgerüst F2 ist eine Zwischengerüstentzundungsvorrichtung 6 angeordnet.Between the rolling stand F1 and the rolling stand F2 is an intermediate scaffolding device 6 arranged.

Je nach Material und gewünschten Enddicken sind verschiedene Walzverfahren möglich:Depending on the material and desired final thicknesses are different rolling processes possible:

Sollen schwer umformbare Materialien gewalzt werden, so wird die Dünnbrammengießanlage 1 so eingestellt, dass je nach gewünschter Enddicke und Gießmaschinenproduktion Brammen mit Dicken zwischen 45 und 70 mm vorzugsweise 55 mm Anwendung finden. Alle sieben Gerüste F1 bis F7 werden angestellt. Die Zwischengerüstentzunderungsvorrichtung 6 ist inaktiv. Bei dieser Fahrweise lassen sich durch die hohen Walzkräfte und die in das zu walzende, schwer umformbare Material einzubringende große Arbeit Walzbanddicken am Ausgang des Walzgerüstes F7 unter 1 mm erreichen wobei die Geschwindigkeit von ca. 15 m/sec. nicht überschritten wird und dennoch Walzband mit austenitischem Gefüge vorliegt.If materials that are difficult to form are to be rolled, the thin slab caster will be used 1 adjusted so that depending on the desired final thickness and Casters production slabs with thicknesses between 45 and 70 mm preferably 55 mm application. All seven scaffolds will be F1 to F7 hired. The scaffolding descaling device 6 is inactive. At this Driving style can be controlled by the high rolling forces and in the to be rolled, hard-to-formate material to be introduced large work rolled strip thicknesses at Exit of the rolling stand F7 can reach below 1 mm whereby the speed of about 15 m / sec. is not exceeded and yet rolled strip with Austenitic structure is present.

Soll leicht umformbares Material mit Enddicken >1 mm gewalzt werden, so werden Dünnbrammendicken von 55 bis 70 mm gewählt. Alle Gerüste F1 bis F7 sind aktiv, während die Zwischengerüstentzunderungsvorrichtung 6 inaktiv ist.If slightly deformable material with final thickness> 1 mm is to be rolled, see above Thin slab thicknesses of 55 to 70 mm are selected. All scaffolding F1 to F7 are active while the tundish de-scaling device 6 is inactive is.

Beim Walzen von leicht umformbarem Material mit Enddicken unter 1 mm muss die Dünnbrammengießanlage 1 auf Dünnbrammendicken zwischen 45 und 50 mm eingestellt werden. Das Walzgerüst F1 ist entweder inaktiv oder ist zu einem Glättstich mit geringer Abnahme angestellt. Der Glättstich bewirkt, dass die Brammenoberfläche glatter wird, so dass sich hinter dem Zunderwäscher 5 eine gleichmäßigere Zunderschicht aufbauen kann. Die aktive Zwischengerüstentzunderungsvorrichtung 6 kann damit leichter den neu entstanden Zunder entfemen. D.h. es wird weniger Entzunderungsmittel auf die Brammen aufgetragen, als wenn das Gerüst F1 nicht zum Glättstich angestellt wäre.When rolling easily deformable material with a final thickness of less than 1 mm the thin slab caster 1 on thin slab thicknesses between 45 and 50 mm. The mill stand F1 is either inactive or is one Smoothing made with a small decrease. The smoothing effect causes the Slab surface is smoother, so that behind the tinder scrubber 5 a can build a more uniform scale layer. The active scaffolding descaling device 6 makes it easier to remove the newly formed scale. That less descaling agent is applied to the slabs, as if the scaffold F1 were not set for smoothing.

Die Gerüste F2 bis F7 werden üblicherweise geringfügig stärker angestellt als bei der Fahrweise, in der alle sieben Gerüste angestellt sind. Durch das Betreiben lediglich der Gerüste F2 bis F7 werden geringere Endwalzengeschwindigkeiten erreicht. Durch die geringere Eingangsbrammendicke und die stärkere Anstellung der Gerüste F2 bis F7 werden dennoch Endwalzdicken unter 1 mm erreicht, wobei das Walzgut Temperaturen im austenitischen Gefügebereich aufweist.The scaffolds F2 to F7 are usually made slightly stronger than in the driving style, in which all seven scaffolding are employed. By operating only the stands F2 to F7 become lower end roll speeds reached. Due to the lower inlet slab thickness and the stronger Setting up the scaffolds F2 to F7 will nevertheless be finish rolling thicknesses below 1 mm achieved, wherein the rolling temperature in the austenitic microstructure having.

Mit der vorliegenden Warmwalzanlage lassen sich damit sowohl schwer umformbare als auch leicht umformbare Materialien bis auf Dicken unter 1 mm im austenitischen Bereich walzen, ohne dass die Ausgangsgeschwindigkeit am Walzgerüst F7 15 m/sec. übersteigt. Damit kann der gesamte Prozeß einfach gestaltet werden, und die Aggregate der Warmwalzanlage, wie z.B. Schere und Haspel behalten ihren einfachen, kostengünstigen Aufbau. Ein erhöhter Aufwand ist nicht erforderlich. With the present hot rolling mill can thus be both difficult to form as well as easily deformable materials down to thicknesses below 1 mm austenitic range rollers without the initial speed on Roll stand F7 15 m / sec. exceeds. This makes the whole process easy designed and the aggregates of the hot rolling mill, such. Scissors and Reels retain their simple, inexpensive construction. An increased effort not necessary.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1.1.
Dünnbrammengießanlagethin slab caster
2.Second
Scherescissors
3.Third
RollenherdofenRoller hearth furnace
4.4th
Notschereemergency shears
5.5th
Zunderwäscherdescaling
6.6th
ZwischengerüstentzunderungsvorrichtungZwischengerüstentzunderungsvorrichtung
7.7th
Walzstraßerolling train
8.8th.
Kühlstreckecooling section
9.9th
Fliegende SchereFlying scissors
10.10th
Haspelreel

Claims (5)

  1. Hot rolling plant for rolling thin hot strip for a widely spread assortment, which is to be rolled, of roll stock difficult to deform, with a thin slab casting plant (1) for casting endless slabs, a cutter (2), which is downstream of the thin slab casting plant (1), for separating continuously cast slabs into desired lengths which each correspond with the length of a coil rolled to finished state or to a multiple thereof, a roller furnace (3) for storing and heating the separated slabs, a scale washer (5) arranged downstream of the roller furnace (3) as well as a seven-stand rolling train (7), with cooling path (8) arranged at the end of the rolling train (7) and cutter (9) for subdividing the semi-endlessly or endlessly rolled strip and at least one reeling device (10) for reeling up the strip to form coils, characterised in that an intermediate stand descaling device (6) is provided between the first stand (F1) and the second stand (F2) of the rolling train (7) and the thin slab casting plant (1) comprises a settable strip guide for setting the thin slab thickness.
  2. Method of operating a hot rolling plant according to claim 1, characterised in that for rolling thin strips of readily deformable material the second to seventh roll stands (F2 to F7) are adjusted in such a manner for rolling that in the case of a predetermined furnace temperature at the outlet of the seventh roll stand (F7) rolled strip with an austenitic structure and controllable speed is obtained, that the first roll stand (F1) stands open, and that the intermediate stand descaling device (6) is acted on in such a manner that scale newly arising between the scale washer (5) and the intermediate stand descaling device (6) is detached.
  3. Method according to claim 2, characterised in that the first stand (F1) is adjusted to a smoothing pass.
  4. Method of operating a hot rolling plant according to claim 1, characterised in that for the rolling of thin strips of material which is difficult to deform all roll stands (F1 to F7) are so adjusted for rolling that in the case of predetermined furnace temperature at the outlet of the seventh stand (F7) rolled stock with austenitic structure is obtained at controllable speeds and that the intermediate stand descaling device (6) is switched off.
  5. Method according to one of claims 2 to 4, characterised in that the furnace temperature lies at approximately 1150° C, the exit temperature of the rolled strip after the last roll stand (F7) does not drop below the temperature which is required for austenitic rolling and the controllable strip speed amounts to approximately 15 m/sec.
EP02794551A 2001-08-07 2002-08-05 Hot rolling installation Expired - Lifetime EP1414596B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10137944A DE10137944A1 (en) 2001-08-07 2001-08-07 Rolling mill, for extra-thin product range, combines thin slab caster and roll stand train with interposed descaler and heat-treating furnace followed by lengthed strip-to-coil winches
DE10137944 2001-08-07
PCT/EP2002/008715 WO2003013750A2 (en) 2001-08-07 2002-08-05 Hot rolling installation

Publications (2)

Publication Number Publication Date
EP1414596A2 EP1414596A2 (en) 2004-05-06
EP1414596B1 true EP1414596B1 (en) 2005-01-26

Family

ID=7694158

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02794551A Expired - Lifetime EP1414596B1 (en) 2001-08-07 2002-08-05 Hot rolling installation

Country Status (18)

Country Link
US (1) US7213432B2 (en)
EP (1) EP1414596B1 (en)
JP (1) JP4455878B2 (en)
KR (1) KR100853666B1 (en)
CN (1) CN1250350C (en)
AT (1) ATE287769T1 (en)
AU (1) AU2002355347B2 (en)
BR (1) BR0211496A (en)
CA (1) CA2456933C (en)
DE (2) DE10137944A1 (en)
ES (1) ES2232785T3 (en)
HU (1) HU224681B1 (en)
MX (1) MXPA04001161A (en)
PL (1) PL201660B1 (en)
RU (1) RU2297889C2 (en)
UA (1) UA77964C2 (en)
WO (1) WO2003013750A2 (en)
ZA (1) ZA200400396B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10325955A1 (en) * 2003-06-07 2004-12-23 Sms Demag Ag Process and plant for producing steel products with the best surface quality
DE102007022931A1 (en) * 2006-05-26 2007-11-29 Sms Demag Ag Production of a metal strip used in a continuous casting process comprises using rolling and milling operations directly with casting of a slab in a casting machine
CN101181718B (en) * 2007-12-11 2010-06-02 武汉钢铁(集团)公司 Method for producing wide strip steel by bar strip continuous casting and rolling as well as system therefor
IT1400002B1 (en) * 2010-05-10 2013-05-09 Danieli Off Mecc PROCEDURE AND PLANT FOR THE PRODUCTION OF FLAT LAMINATED PRODUCTS
RU2466806C1 (en) * 2011-06-24 2012-11-20 Открытое акционерное общество Акционерная холдинговая компания "Всероссийский научно-исследовательский и проектно-конструкторский институт металлургического машиностроения имени академика Целикова" (ОАО АХК "ВНИИМЕТМАШ") Method of sheet hot rolling from aluminium and its alloys
DE102013220657A1 (en) * 2013-07-26 2015-01-29 Sms Siemag Ag Method and device for producing a metallic strip in a continuous casting-rolling process
DE102014204073A1 (en) * 2014-03-06 2015-09-10 Robert Bosch Gmbh Near-net shape hot rolling of guide rails
CN111842484B (en) * 2020-07-23 2021-07-27 东北大学 Continuous casting slab hot core rolling method based on alternate work of two rollers
DE102022208498A1 (en) 2022-08-16 2024-02-22 Sms Group Gmbh Process for producing metallic strips by casting rolls

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US870553A (en) * 1907-04-01 1907-11-12 Eduard Eulenstein Copying-press.
US885974A (en) * 1907-06-19 1908-04-28 Pietro Boggio Swinging-window catch.
US4402402A (en) * 1981-10-14 1983-09-06 Pike Brian R Barrier seal multiple-compartment package
JPH0763751B2 (en) * 1987-01-24 1995-07-12 株式会社日立製作所 Hot rolling line
DE4402402B4 (en) * 1994-01-27 2004-05-13 Sms Demag Ag Process for producing hot-rolled steel strip from continuously cast starting material and plant for carrying out the process
DE19529049C1 (en) * 1995-07-31 1997-03-20 Mannesmann Ag High-speed thin slab plant
US5743125A (en) * 1995-09-06 1998-04-28 Sms Schloemann-Siemag Aktiengesellschaft Hot strip production plant for rolling thin rolled strip
DE19540978A1 (en) * 1995-11-03 1997-05-07 Schloemann Siemag Ag Production plant for the continuous or discontinuous rolling out of hot strip
DE19649295A1 (en) * 1996-11-28 1998-06-04 Schloemann Siemag Ag Hot rolling mill
IT1290743B1 (en) 1997-04-10 1998-12-10 Danieli Off Mecc LAMINATION PROCESS FOR FLAT PRODUCTS WITH THIN THICKNESSES AND RELATED ROLLING LINE
DE19725434C2 (en) 1997-06-16 1999-08-19 Schloemann Siemag Ag Process for rolling hot wide strip in a CSP plant
DE19750817C2 (en) * 1997-11-17 2003-03-20 Sms Demag Ag Process for improving the surface quality of a continuously cast slab
DE19817034A1 (en) * 1998-04-17 1999-10-21 Schloemann Siemag Ag Continuous casting of thin metal slabs
DE10062868A1 (en) * 2000-12-16 2002-06-20 Sms Demag Ag Process for casting and immediately subsequent rolling and a device for supporting, guiding and deforming a metal, in particular a steel strand

Also Published As

Publication number Publication date
HUP0401143A2 (en) 2004-09-28
RU2297889C2 (en) 2007-04-27
AU2002355347B2 (en) 2007-06-21
JP2004537418A (en) 2004-12-16
MXPA04001161A (en) 2004-07-08
WO2003013750A3 (en) 2003-09-25
BR0211496A (en) 2004-08-17
ATE287769T1 (en) 2005-02-15
CN1250350C (en) 2006-04-12
CA2456933A1 (en) 2003-02-20
KR20040015384A (en) 2004-02-18
CN1538884A (en) 2004-10-20
ES2232785T3 (en) 2005-06-01
PL201660B1 (en) 2009-04-30
DE10137944A1 (en) 2003-02-20
ZA200400396B (en) 2004-08-23
HU224681B1 (en) 2005-12-28
US20040232605A1 (en) 2004-11-25
UA77964C2 (en) 2007-02-15
KR100853666B1 (en) 2008-08-25
DE50202130D1 (en) 2005-03-03
EP1414596A2 (en) 2004-05-06
US7213432B2 (en) 2007-05-08
RU2004106612A (en) 2005-03-27
WO2003013750A2 (en) 2003-02-20
PL365390A1 (en) 2005-01-10
JP4455878B2 (en) 2010-04-21
CA2456933C (en) 2009-11-10

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