EP2516079B1 - Method for hot-rolling a slab and hot-rolling mill - Google Patents

Method for hot-rolling a slab and hot-rolling mill Download PDF

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Publication number
EP2516079B1
EP2516079B1 EP10803583.3A EP10803583A EP2516079B1 EP 2516079 B1 EP2516079 B1 EP 2516079B1 EP 10803583 A EP10803583 A EP 10803583A EP 2516079 B1 EP2516079 B1 EP 2516079B1
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EP
European Patent Office
Prior art keywords
cooling
slab
hot
rolling
width
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Revoked
Application number
EP10803583.3A
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German (de)
French (fr)
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EP2516079A2 (en
Inventor
Klaus Berchem
Ingo Schuster
Dirk Schmidt
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SMS Group GmbH
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SMS Siemag 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
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/26—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—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 lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • 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
    • B21B45/02—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 lubricating, cooling, or cleaning
    • 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
    • B21B1/02—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 heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing
    • B21B2001/028—Slabs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/06—Thermomechanical rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/20—Temperature
    • B21B2261/21—Temperature profile
    • 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
    • B21B45/02—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 lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants

Definitions

  • the cooling of the slab can take place in an intermediate cooling stand or on a cooling section.

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

Description

Die Erfindung betrifft ein Verfahren zum Warmwalzen einer Bramme, insbesondere einer Stahlbramme, wobei die Bramme mindestens zweier Umformungen bei verschiedenen Temperaturen in einem Warmwalzwerk unterzogen wird, wobei die Bramme zwischen zwei derartigen Umformungen gekühlt wird, wobei die Kühlung der Bramme so erfolgt, dass die seitlichen Endbereiche der Bramme mit einer geringeren Kühlleistung beaufschlagt werden als ein mittiger Bereich der Bramme. Des weiteren betrifft die Erfindung ein Warmwalzwerk zum Warmwalzen einer Bramme.The invention relates to a method for hot rolling a slab, in particular a steel slab, wherein the slab is subjected to at least two transformations at different temperatures in a hot rolling mill, wherein the slab is cooled between two such transformations, wherein the cooling of the slab is carried out so that the lateral End regions of the slab are subjected to a lower cooling capacity than a central region of the slab. Furthermore, the invention relates to a hot rolling mill for hot rolling a slab.

Das Warmwalzen einer Bramme ist im Stand der Technik hinlänglich bekannt. Dabei wird als ein bevorzugtes Verfahren ein mehrphasiges Warmwalzen eingesetzt, wobei eine wiederum spezielle Verfahrensweise das thermomechanische Walzen (TM Verfahren) ist.Hot rolling of a slab is well known in the art. In this case, as a preferred method, a multi-phase hot rolling is used, wherein a turn special procedure is the thermomechanical rolling (TM method).

Eine typische Anwendung dieses Verfahrens ist die Erzeugung von warmgewalztem Stahlband und -blech aus mikrolegierten Stählen.A typical application of this method is the production of hot rolled steel strip and sheet from microalloyed steels.

Ziel ist dabei eine hohe Homogenität des Materials, das aus der warmgewalzten Bramme gefertigt wird, d. h. die Materialeigenschaften sollen im Material räumlich konstant sein. Um dies zu erreichen, ist eine möglichst hohe Temperaturhomogenität in der Bramme während des Warmwalzens erforderlich, d. h. der Zwischenbramme, woraus sich auch gleichmäßige Eigenschaften beim Endprodukt ergeben.The aim is a high homogeneity of the material, which is made from the hot-rolled slab, d. H. The material properties should be spatially constant in the material. To achieve this, the highest possible temperature homogeneity in the slab during hot rolling is required, i. H. the intermediate slab, resulting in even properties of the final product.

Laufen die einzelnen Walzoperationen beim Warmwalzen in mehreren Temperatur-Phasen ab - wie es beim thermomechanischen Walzen typisch ist -, werden zwischen den einzelnen Walzphasen Pausen eingelegt, in denen die Bramme gleichmäßig auf eine neue, niedrigere Temperatur abgekühlt wird.If the individual rolling operations during hot rolling take place in several temperature phases-as is typical in thermomechanical rolling-intervals are set between the individual rolling phases in which the slab is uniformly cooled to a new, lower temperature.

Sobald die Zieltemperatur erreicht ist, beginnt die nächste Walzphase. Dabei ist es technologisch vorteilhaft, dass die Zwischenbrammen eine gleichmäßige Temperatur aufweisen.Once the target temperature is reached, the next rolling phase begins. It is technologically advantageous that the intermediate slabs have a uniform temperature.

Während der Wartezeit kühlen die seitlichen Bereiche der Bramme schneller ab als deren Kern. Die Folge hiervon sind kalte Kanten. Diese kalten Kanten können bei den sich anschließenden Walzstichen problematisch sein. Weiterhin können sich infolge derer die Eigenschaften des Endprodukts verschlechtern. Da die Wartezeiten zwischen den Walzphasen mit der Brammendicke zunehmen, ist dieses Problem bei dicken Zwischenbrammen besonders häufig anzutreffen.During the waiting time, the lateral areas of the slab cool faster than their core. The consequence of this are cold edges. These cold edges can be problematic in the subsequent rolling passes. Furthermore, as a result of which, the properties of the final product may deteriorate. Since the waiting times between the rolling phases increase with the slab thickness, this problem is particularly common in thick intermediate slabs.

Ein Verfahren der eingangs genannten Art ist aus der EP 2 305 392 A1 bekannt. Die JP 7 150229 A offenbart das Abdecken der Randbereiche einer Bramme mittels einfahrbahrer Abdeckplatten. In der EP 0 823 294 A1 und der EP 0 885 974 A1 werden andere Lösungen beschrieben.A method of the type mentioned is from the EP 2 305 392 A1 known. The JP 7 150229 A discloses the covering of the edge regions of a slab by means of drive-in cover plates. In the EP 0 823 294 A1 and the EP 0 885 974 A1 other solutions are described.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren und ein zugehöriges Walzwerk der eingangs genannten Art dahingehend weiterzubilden, dass die oben genannten Nachteile vermieden werden. Demgemäß soll es möglich sein, eine hohe Qualität der Zwischenbramme und des Endprodukts aufrechtzuerhalten. Weiterhin soll der Warmwalzprozess nach der ersten Brammenkühlung optimal durchgeführt werden können.The present invention is therefore based on the object, a method and an associated rolling mill of the type mentioned in such a way that the above-mentioned disadvantages are avoided. Accordingly, it should be possible to maintain a high quality of the intermediate slab and the final product. Furthermore, the hot rolling process after the first slab cooling should be optimally performed.

Die Lösung dieser Aufgabe durch die Erfindung ist verfahrensgemäß dadurch gekennzeichnet, dass der Kühlvorgang mit Hilfe einer angeschlossenen Temperaturberechnung so gesteuert wird, dass eine Unterschreitung der Ferrit-Ausscheidungstemperatur vermieden wird, so dass eine unerwünschte Ferritbildung ausgeschlossen wird, wobei zwei die Düsen eines Kühlbalkens abdeckende Schieber in eine horizontale Richtung quer zur Walzrichtung so verschoben werden, dass eine definierte Austrittsbreite des Kühlstrahls des Kühlbalkens gegeben ist.The solution of this problem by the invention according to the method is characterized in that the cooling process by means of a connected temperature calculation is controlled so that falls below the ferrite precipitation temperature is avoided, so that unwanted ferrite formation is excluded, with two nozzles of a cooling bar covering slide be shifted in a horizontal direction transverse to the rolling direction so that a defined outlet width of the cooling jet of the cooling beam is given.

Die Kühlung der Bramme erfolgt bevorzugt durch Aufgabe eines Kühlmediums, wobei die seitlichen Endbereiche der Bramme vom Kühlmedium zumindest teilweise abgeschirmt werden.The cooling of the slab is preferably carried out by giving up a cooling medium, wherein the lateral end portions of the slab are at least partially shielded by the cooling medium.

Die Kühlung der Bramme kann in einem Zwischenkühlgerüst oder auf einer Kühlstrecke erfolgen.The cooling of the slab can take place in an intermediate cooling stand or on a cooling section.

Durch die Steuerung der Aktiv-Kühlung wird gegebenenfalls sichergestellt, dass es während der Aktivkühlphase nicht zu einer unerwünschten Umwandlung von Austenit in Ferrit kommt.By controlling the active cooling, it may be ensured that there is no undesirable transformation of austenite into ferrite during the active cooling phase.

Das Warmwalzen der Bramme ist dabei bevorzugt ein mehrphasiges Walzen, insbesondere ein thermomechanisches Walzen.The hot rolling of the slab is preferably a multi-phase rolling, in particular a thermomechanical rolling.

Das vorgeschlagene Warmwalzwerk zum Warmwalzen einer Bramme hat mindestens zwei Warmwalzgerüste, wobei entweder zwischen diesen oder vor dem Vorgerüst mindestens eine Kühlstation angeordnet ist, in der die Bramme abgekühlt werden kann, wobei die Kühlstation Mittel aufweist, mit denen die auf die Bramme aufgegebene Kühlleistung über der Breite der Bramme verändert werden kann, derart, dass die Kühlung der Bramme so erfolgt, dass die seitlichen Endbereiche der Bramme mit einer geringeren Kühlleistung beaufschlagt werden als ein mittiger Bereich der Bramme, wobei die Mittel ein Kühlbalken zur Ausbringung von Kühlmedium auf die Bramme sind. Das Warmwalzwerk zeichnet sich dadurch aus, dass die Breite des Strahls des Kühlmediums über der Breite der Bramme einstellbar ist, indem zwei die Düsen des Kühlbalkens abdeckende Schieber in eine horizontale Richtung quer zur Walzrichtung verschiebbar angeordnet sind, so dass eine definierte Austrittsbreite des Kühlstrahls des Kühlbalkens gegeben ist.The proposed hot rolling mill for hot rolling a slab has at least two hot rolling stands, either between them or in front of the roughing stand at least one cooling station is arranged, in which the slab can be cooled, wherein the cooling station comprises means with which the given on the slab cooling capacity above the Width of the slab can be changed, such that the cooling of the slab is carried out so that the lateral end portions of the slab are subjected to a lower cooling power than a central region of the slab, wherein the means are a cooling bar for the application of cooling medium to the slab. The hot rolling mill is characterized in that the width of the jet of the cooling medium is adjustable over the width of the slab by two slidably covering the nozzles of the cooling beam sliders are arranged in a horizontal direction transversely to the rolling direction, so that a defined outlet width of the cooling beam of the cooling beam given is.

Die Kühlstation ist bevorzugt ein Zwischenkühlgerüst oder eine Kühlstrecke.The cooling station is preferably an intermediate cooling stand or a cooling section.

Gemäß der Erfindung wird also beim Warmwalzen eine aktive Zwischenkühlung vorgenommen, die so ausgelegt wird, dass die Seitenbereiche (Kanten) der Bramme nicht mit gekühlt werden. Nach dem aktiven Kühlen und nach einer Ausgleichszeit erhält man so eine Bramme, die eine gleichmäßigere Temperaturverteilung besitzt als eine konventionell gekühlte Bramme, unabhängig davon, ob die Kühlung aktiv erfolgt oder passiv (an der Luft).According to the invention, an active intermediate cooling is thus carried out during hot rolling, which is designed so that the side regions (edges) of the slab are not cooled with. After active cooling and after a compensation period, a slab is obtained which has a more uniform temperature distribution than a conventionally cooled slab, regardless of whether the cooling is active or passive (in the air).

Schließlich ist das Warmwalzwerk dadurch gekennzeichnet, dass die Kühlbreite durch elektrische oder mechanische Einrichtungen auf die entsprechende Kühlbreite eingestellt wird.Finally, the hot rolling mill is characterized in that the cooling width is adjusted by electrical or mechanical means to the appropriate cooling width.

In der Zeichnung sind Ausführungsbeispiele der Erfindung dargestellt. Es zeigen:

Fig. 1
schematisch die Seitenansicht eines Warmwalzwerks, wobei lediglich zwei Warmwalzgerüste mit einer dazwischen angeordneten Kühlstation skizziert sind,
Fig. 2
schematisch den Schnitt A-B gemäß Fig. 1, dargestellt für die obere Hälfte der Kühlstation und
Fig. 3
schematisch den Schnitt A-B gemäß Fig. 1, dargestellt für die obere Hälfte der Kühlstation, wobei eine alternative Lösung dargestellt ist.
In the drawings, embodiments of the invention are shown. Show it:
Fig. 1
schematically the side view of a hot rolling mill, wherein only two hot rolling stands are sketched with a cooling station arranged therebetween,
Fig. 2
schematically the section AB according to Fig. 1 , shown for the upper half of the cooling station and
Fig. 3
schematically the section AB according to Fig. 1 , shown for the upper half of the cooling station, wherein an alternative solution is shown.

In Fig. 1 ist ein Warmwalzwerk 2 skizziert, in dem eine Bramme 1 gewalzt werden kann. Hierfür sind eine Anzahl Warmwalzgerüste 8, 9 vorhanden, wobei nur zwei dieser Gerüste dargestellt sind. Die Bramme wird beim Walzen in Walzrichtung W gefördert und dabei in bekannter Weise gewalzt. Die Bramme wird beim Walzen einer thermo-mechanischen Bearbeitung unterzogen.In Fig. 1 a hot rolling mill 2 is sketched in which a slab 1 can be rolled. For this purpose, a number of hot rolling stands 8, 9 are present, with only two of these stands are shown. The slab is conveyed during rolling in the rolling direction W and thereby rolled in a known manner. The slab undergoes thermo-mechanical processing during rolling.

Demgemäß wird die Bramme 1 in einem ersten Warmwalzgerüst 8 einer Dickenreduktion unterzogen. Hinter dem Gerüst 8 wird die Bramme 1 gekühlt, wofür sie durch eine Kühlstation 7 geleitet wird, die vorliegend als Zwischenkühlgerüst ausgebildet ist.Accordingly, the slab 1 in a first hot rolling mill 8 is subjected to thickness reduction. Behind the framework 8, the slab 1 is cooled, for which it is passed through a cooling station 7, which is designed here as an intermediate cooling stand.

Hinter der Kühlstation 7 erfolgt ein nochmaliges Walzen der Bramme 1, jetzt in einem Warmwalzgerüst 9, und zwar bei einer geringeren Temperatur als im Walzgerüst 8.Behind the cooling station 7, a further rolling of the slab 1, now in a hot rolling mill 9, and at a lower temperature than in the rolling stand. 8

Die Kühlung der Bramme 1 in der Kühlstation 7 erfolgt durch Aufsprühen eines Kühlmediums 6, hier in Form von Wasser. Hierfür sind an sich bekannte Kühlbalken 12 vorhanden.The cooling of the slab 1 in the cooling station 7 by spraying a cooling medium 6, here in the form of water. For this purpose, known cooling bars 12 are available.

Wie die Kühlung der Bramme 1 nach einer nicht erfindungsgemäßen Ausgestaltung erfolgt, ist aus Fig. 2 ersichtlich. Hiernach läuft die Bramme 1 unter dem Sprühstrahl des Kühlmediums 6 in Walzrichtung W unter dem Kühlbalken vorbei (von unten wird die Bramme ebenfalls - was nicht dargestellt ist - von einem Kühlbalken besprüht), wodurch die Bramme 1 abkühlt. Um das Abkühlen in den seitlichen Endbereichen 3 und 4 der Bramme 1 zu reduzieren, sind Abdeckbleche 10 und 11 vorhanden, die in Richtung der Doppelpfeile so weit in Richtung Brammenmitte geschoben werden, dass ein hinreichend großer Seitenbereich der Bramme vor dem unmittelbaren Kontakt mit Kühlmedium 6 geschützt wird. Indes erhält der mittige Bereich 5 der Bramme die volle Kühlleistung vom Kühlmedium.As the cooling of the slab 1 takes place according to a non-inventive embodiment, is off Fig. 2 seen. Thereafter, the slab 1 passes under the spray of the cooling medium 6 in the rolling direction W under the chilled beam over (from below, the slab is also - which is not shown - sprayed by a chilled beam), whereby the slab 1 is cooled. In order to reduce the cooling in the lateral end regions 3 and 4 of the slab 1, cover plates 10 and 11 are present, which are pushed in the direction of the double arrows in the direction of the slab center so that a sufficiently large side region of the slab prior to direct contact with the cooling medium. 6 is protected. Meanwhile, the central area 5 of the slab receives the full cooling capacity from the cooling medium.

Durch Wahl der Position der Abdeckbleche 10 und 11 kann darauf Einfluss genommen werden, inwieweit die Seitenbereiche 3, 4 der Bramme 1 geschützt werden sollen, so dass insgesamt durch Wahl der genannten Parameter eine homogene Temperaturverteilung über die Breite der Bramme 1 sichergestellt werden kann. Die Breite und die Position der Bramme sind aus dem letzten Zentriervorgang der Bramme vor der Kühlstation 7 bekannt und können vom Level-2 übergeben werden. Die Einstellung bzw. Positionierung der Abdeckbleche 10 und 11 erfolgt entsprechend.By choosing the position of the cover plates 10 and 11, it can be influenced to what extent the side regions 3, 4 of the slab 1 are to be protected, so that overall a homogeneous temperature distribution over the width of the slab 1 can be ensured by selecting the mentioned parameters. The width and the position of the slab are known from the last centering of the slab in front of the cooling station 7 and can from Level 2 will be passed. The adjustment or positioning of the cover plates 10 and 11 takes place accordingly.

Dennoch wird eine relativ schnelle und damit wirtschaftliche Warmwalzfertigung ermöglicht, da durch die aktive Kühlung in der Kühlstation 7 ein schnelles Kühlen der Bramme 1 erfolgen kann, so dass der sich anschließende weitere Warmwalzvorgang im Gerüst 9 bald stattfinden kann.Nevertheless, a relatively fast and therefore economical hot rolling production is possible, since a rapid cooling of the slab 1 can be done by the active cooling in the cooling station 7, so that the subsequent further hot rolling process in the framework 9 can take place soon.

Eine erfindungsgemäße Ausführungsform der vorliegenden Konzeption ist in Fig. 3 dargestellt. Hiernach wird ein Kühlbalken 12 eingesetzt, der eine hinreichende Breite der Bramme 1 abdeckt. Allerdings sind Schieber 10' und 11' am Kühlbalken 12 vorgesehen, die die Randbereiche des Kühlbalkens 12 und namentlich die sich dort befindlichen Düsen abdecken, so dass die Breite des Kühlstrahls mehr oder weniger groß eingestellt werden kann. Hierzu werden die Schieber 10', 11' in Richtung des Doppelpfeils entsprechend verschoben. Der Effekt ist derselbe, wie bei der Lösung gemäß Fig. 2. Die seitlichen Endbereiche 3, 4 der Bramme 1 werden mit weniger Kühlmedium beaufschlagt, der mittige Bereich 5 indes erhält die maximale Kühlleistung.An inventive embodiment of the present concept is in Fig. 3 shown. Thereafter, a cooling bar 12 is used, which covers a sufficient width of the slab 1. However, slide 10 'and 11' are provided on the cooling beam 12, which cover the edge regions of the cooling beam 12 and, in particular, the nozzles located there, so that the width of the cooling jet can be adjusted more or less large. For this purpose, the slide 10 ', 11' are moved accordingly in the direction of the double arrow. The effect is the same as in the solution according to Fig. 2 , The lateral end portions 3, 4 of the slab 1 are subjected to less cooling medium, the central region 5, however, receives the maximum cooling capacity.

Die Kanten der Bramme können also während der aktiven Kühlung geschützt werden dadurch, dass jeweils nur Kühlbalken angesteuert werden, deren Spritzbild speziell auf eine spezifische Brammenbreite ausgelegt ist - s. Lösung gemäß Fig. 3.The edges of the slab can thus be protected during active cooling by controlling only cooling bars whose spray pattern is specially designed for a specific width of slab - s. Solution according to Fig. 3 ,

Natürlich sind auch andere technische Umsetzungen des erfindungsgemäßen Konzepts möglich.Of course, other technical implementations of the inventive concept are possible.

Demgemäß wird das Problem der kalten Kanten der Transferbramme 1 vermieden; die Bramme erhält eine homogene Temperatur über den Querschnitt.Accordingly, the problem of the cold edges of the transfer slab 1 is avoided; the slab is given a homogeneous temperature over the cross section.

Bezugszeichenliste:LIST OF REFERENCE NUMBERS

11
Brammeslab
22
WarmwalzwerkHot Rolling Mill
33
seitlicher Endbereich der Brammelateral end of the slab
44
seitlicher Endbereich der Brammelateral end of the slab
55
mittiger Bereich der Brammecentral area of the slab
66
Kühlmediumcooling medium
77
Kühlstation (Zwischenkühlgerüst)Cooling station (intercooler)
88th
WarmwalzgerüstHot rolling mill
99
WarmwalzgerüstHot rolling mill
1010
Mittel zum AbdeckenMeans for covering
10'10 '
Mittel zum AbdeckenMeans for covering
1111
Mittel zum AbdeckenMeans for covering
11'11 '
Mittel zum AbdeckenMeans for covering
1212
KühlbalkenChilled beams
WW
Walzrichtungrolling direction

Claims (9)

  1. Method of hot rolling a slab (1), particularly a steel slab, wherein the slab (1) is subjected to at least two reshapings at different temperatures in a hot-rolling mill (2), wherein the slab (1) is actively cooled between two reshapings of that kind and wherein the cooling of the slab (1) is carried in such a manner that the lateral end regions (3, 4) of the slab (1) are subjected to a lower cooling effect than a central region (5) of the slab (1), characterised in that the cooling process is so controlled with the help of a connected temperature calculation that exceeding of the ferrite precipitation temperature is avoided so that undesired formation of ferrite is excluded, wherein two sliders (10', 11') covering the nozzles of a cooling bar (12) are so displaced in a horizontal direction transversely to the rolling direction (W) that a defined issue width of the cooling jet of the cooling bar (12) is given.
  2. Method according to claim 1, characterised in that the cooling of the slab (1) is carried out by delivery of a cooling medium (6), wherein the lateral end regions (3, 4) of the slab (1) are at least partly screened from the cooling medium (6).
  3. Method according to claim 1 or 2, characterised in that the cooling of the slab (1) is carried out in an intermediate cooling stand (7).
  4. Method according to claim 1 or 2, characterised in that the cooling of the slab (1) is carried out on a cooling path.
  5. Method according to any one of claims 1 to 4, characterised in that the hot rolling of the slab (1) is a multi-phase rolling, particularly a thermomechanical rolling.
  6. Hot-rolling mill (2) for hot rolling a slab (1), particularly a steel slab, wherein the hot-rolling mill (2) comprises at least two hot-rolling stands (8, 9) and wherein arranged between these or upstream of the roughing stand is at least one cooling station (7) in which the slab (1) can be cooled down, wherein the cooling station (7) comprises means (10, 11; 10', 11', 12) by which the cooling effect supplied to the slab (1) can be so varied over the width of the slab (1) that the cooling of the slab (1) takes place in such a manner that the lateral end regions (3, 4) of the slab (1) are subjected to a lower cooling effect than a central region (5) of the slab (10, wherein the means (10', 11', 12) are a cooling bar (12) for application of cooling medium (6) to the slab (1), characterised in that the width of the jet of cooling medium (6) is settable (10', 11') over the width of the slab (1) in that two of sliders (10', 11') covering the nozzles of the cooling bar (12) are arranged to be displaceable in a horizontal direction transversely to the rolling direction (W) so that a defined outlet width of the cooling jet of the cooling bar (12) is given.
  7. Hot-rolling mill according to claim 6, characterised in that the cooling station (7) is an intermediate cooling stand.
  8. Hot-rolling mill according to claim 6, characterised in that the cooling station (7) is a cooling path.
  9. Hot-rolling mill according to any one of claims 6 to 8, characterised in that the cooling width is set by electrical or mechanical devices to the appropriate cooling width.
EP10803583.3A 2009-12-23 2010-12-06 Method for hot-rolling a slab and hot-rolling mill Revoked EP2516079B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009060256A DE102009060256A1 (en) 2009-12-23 2009-12-23 Method for hot rolling a slab and hot rolling mill
PCT/EP2010/068904 WO2011076544A2 (en) 2009-12-23 2010-12-06 Method for hot-rolling a slab and hot-rolling mill

Publications (2)

Publication Number Publication Date
EP2516079A2 EP2516079A2 (en) 2012-10-31
EP2516079B1 true EP2516079B1 (en) 2015-02-11

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EP10803583.3A Revoked EP2516079B1 (en) 2009-12-23 2010-12-06 Method for hot-rolling a slab and hot-rolling mill

Country Status (7)

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US (1) US20120297849A1 (en)
EP (1) EP2516079B1 (en)
KR (1) KR101421976B1 (en)
CN (1) CN102655959B (en)
DE (1) DE102009060256A1 (en)
RU (1) RU2528560C2 (en)
WO (1) WO2011076544A2 (en)

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US11331704B2 (en) 2017-07-24 2022-05-17 Primetals Technologies Austria GmbH Roller framework having a framework cooler for cooling a steel band

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CN106944492A (en) * 2016-01-06 2017-07-14 天津皕劼同创精密钛铸造有限公司 A kind of preparation method of TA17 titanium alloy plates
JP6439943B2 (en) * 2016-03-31 2018-12-19 Ｊｆｅスチール株式会社 Steel plate bottom surface cooling method and cooling device
CN110050077A (en) * 2016-12-07 2019-07-23 艾伯纳工业筑炉有限公司 For carrying out the register of temperature adjustment to component
JP6493562B2 (en) * 2017-03-31 2019-04-03 新日鐵住金株式会社 Hot-rolled steel sheet cooling apparatus and hot-rolled steel sheet cooling method
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DE102018205685A1 (en) * 2018-04-13 2019-10-17 Sms Group Gmbh Cooling device and method for its operation
CN110238207A (en) * 2019-05-29 2019-09-17 北京科技大学 A kind of edge part shading device for Strip control cooling system

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Publication number Priority date Publication date Assignee Title
US11331704B2 (en) 2017-07-24 2022-05-17 Primetals Technologies Austria GmbH Roller framework having a framework cooler for cooling a steel band
US11712725B2 (en) 2017-07-24 2023-08-01 Primetals Technologies Austria GmbH Roller framework having a framework cooler for cooling a steel band

Also Published As

Publication number Publication date
CN102655959B (en) 2016-05-18
WO2011076544A2 (en) 2011-06-30
EP2516079A2 (en) 2012-10-31
RU2528560C2 (en) 2014-09-20
RU2012131155A (en) 2014-01-27
KR101421976B1 (en) 2014-07-22
US20120297849A1 (en) 2012-11-29
WO2011076544A3 (en) 2011-08-18
CN102655959A (en) 2012-09-05
DE102009060256A1 (en) 2011-06-30
KR20120102740A (en) 2012-09-18

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