EP0745444B1 - Method and installation for producing thin slabs or sheets of steel - Google Patents
Method and installation for producing thin slabs or sheets of steel Download PDFInfo
- Publication number
- EP0745444B1 EP0745444B1 EP96107187A EP96107187A EP0745444B1 EP 0745444 B1 EP0745444 B1 EP 0745444B1 EP 96107187 A EP96107187 A EP 96107187A EP 96107187 A EP96107187 A EP 96107187A EP 0745444 B1 EP0745444 B1 EP 0745444B1
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- EP
- European Patent Office
- Prior art keywords
- strip
- side walls
- thickness
- casting
- cast
- 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.)
- Expired - Lifetime
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 18
- 239000010959 steel Substances 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims description 11
- 238000009434 installation Methods 0.000 title description 2
- 238000005266 casting Methods 0.000 claims abstract description 24
- 239000007788 liquid Substances 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 abstract 1
- 230000008859 change Effects 0.000 description 5
- 238000009749 continuous casting Methods 0.000 description 5
- 229910001208 Crucible steel Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- 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
- 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
Definitions
- the invention relates to a method for producing thin slabs or Steel strips, whereby a strand of slab cast in a mold passes through at least one pair of squeeze rollers arranged after the mold is reduced in thickness.
- the broad side walls are separated by an amount of about 0.3 to 0.6 mm moves, which is an easy to move the narrow side walls enables.
- Such an adjustment can be carried out as described in CH-A-489298 be made without removing the mold, for example during the unavoidable downtime of the continuous caster between two Castings.
- the adjustment of the mold width then follows in any case mandatory adjustment of the guide and downstream of the mold Transport rollers.
- EP-B1 0 326 190 System for producing a steel strip by deforming a cast one Steel strand or a thin slab is one by EP-B1 0 326 190 System known, which consists of a continuous casting machine with a oscillating continuous mold as well as cooled walls and an am Mold outlet arranged, having a pair of reducing rollers Deformation device for the steel strand exists.
- the continuously cast Steel band consisting of a solidified strand shell and a Liquid core is composed in a rolling deformation reduced in thickness and then rolled.
- the funnel-shaped, oscillating continuous mold has an outlet cross section a thickness of 40 to 50 mm, and after exiting the mold the cast steel strip of appropriate thickness through the pair of reducing rollers compressed so far that the inner walls of the in the mold weld strand shells that have already solidified.
- the Thickness reduction of the not yet solidified steel strand with the help the pair of reducing rollers of the deformation device and at least one this subordinate roll stand make it possible to use steel strip strands to achieve a thickness significantly less than 25 mm, which depends the casting speed and the pressing force of the pair of reducing rollers is. As a result of changed casting speeds behind the Reducing roller pair occurring different strip thicknesses are over adapted pressing forces of the reducing rollers compensated.
- the subordinate strand guide For continuous casting machines with between the mold and the strand guide arranged thickness reduction roller set, it is for retracting the Start-up line with a start-up head corresponding to the mold width required, the strand guide and the reducing roller set on the Adjust the starting head thickness. This setting must be maintained until after starting, the start-up head with the solidified cast strand foot Reduction roller set has passed and one from strand shell and liquid Core of existing strand area can be deformed by this.
- the subordinate strand guide must also change the strand thickness adapted to greater design and control engineering effort become.
- a starting device for a Steel strip casting mold especially for steel strips with a thickness of less than 60 mm described, consisting of a one-piece steel plate, which is longer than the distance between the mold sealing area and the common axis plane of the roller or roller set.
- This starting device is in the Lowered mold until its support and discharge area from the first Roll or roller pair is detected and the upper edge of the Sealing area coincides with the sealing level of the mold. After this Casting on and forming a resilient connection between the The starting device and the cast steel belt are conveyed out through the pair of rollers or rollers. Even with this known method is a subsequent adjustment of the strand guide to itself setting change of strand thickness required.
- the invention has for its object an operationally reliable method for the production of thin slabs or steel strips of high quality Continuous casting and subsequent roll forming to create a Change in thickness of the strand is possible.
- the start of the casting should can be carried out with little design and control effort and the amount of scrap caused by casting on is reduced.
- the task is given in a method of the type specified achieved according to the invention in that a strand with at the start of casting one about the finished size roller gap of the pair of squeeze rollers corresponding thickness, which corresponds to the thickness of the starting strand, is poured, the solidified strand shell and liquid core existing strand is guided between the nip rollers and as soon as the cast strand, the pair of squeeze rollers and the ones arranged underneath Leadership roles achieved that Casting thickness of the strand increases continuously and the thicker casting strand between the press rolls to the finished size is roll deformed.
- the casting process can be carried out with carried out quickly and reliably using a thin start-up line become.
- An adjustment of the subordinate role guidance is not necessary when pouring.
- the amount of junk is due to the narrow initial cross section and small without a longer transition piece.
- the invention further proposes that the casting thickness of the strand at the start of casting is 40 - 60 mm and then 60 - 80 mm and the finished thin slab or steel strip strand from the Strand tip to a uniform finished thickness in the area 40 - 60 mm.
- the casting width of the Slab strand can be set.
- Guide profiles one guide opening each for one narrow side wall have from a lateral investment position slidable on the broad side walls between the broad side walls and the broad side walls from a narrow spacing position defined in a further distance position are adjustable.
- the wide side walls can have an extended pouring area form the in the casting direction to the format of the cast Stranges is reduced.
- the broad side walls 3 form for receiving one Immersion pouring tube 5 an enlarged upper pouring area 6.
- the mold 1 is a pair of squeeze rollers 7 and then guide rollers 8 mounted thereon are arranged downstream. (Figs. 1 and 2)
- the broad side walls 3 of the mold 1 are each a side frame part 9 attached by spindle drives 10 are adjustable in their mutual distance.
- a U-shaped guide profile 14 is attached to the head piece 12, in which a support element 15 of the narrow side wall 4 in the direction the arrow 16 is guided.
- the leadership profile 14 is located on the end face on the side faces of the broad side walls 3 in annex.
- the narrow side wall 4 penetrates the guide profile 14 and forms the mold wall.
- the preparation of the system for pouring a slab 2 is made by adjusting the mold width, Nip and guide roller spacing on the Thickness dimension of the starting strand provided with connecting head 17 18 of e.g. 50 mm. This can be seen in FIGS. 1 and 4 Setting the narrow side walls 4 are in the side System on the broad side walls 3.
- After retracting the Starting strand 18 in the mold 1 is the molten steel passed through dip tube 5 into the mold 1.
- the molten steel freezes on the chilled mold walls to form the strand shell 19 and forms with the connecting head 17 of the starting line 18 a sprue connection.
- the transmission element symbolizes 20 the adjustment drive.
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Herstellung von Dünnbrammen oder Stahlbändern, wobei ein in einer Kokille gegossener Brammenstrang durch mindestens ein der Kokille nachgeordnetes Quetschwalzenpaar dickenverringert wird.The invention relates to a method for producing thin slabs or Steel strips, whereby a strand of slab cast in a mold passes through at least one pair of squeeze rollers arranged after the mold is reduced in thickness.
Üblicherweise bestehen die für die Herstellung von Dünnbrammen oder Stahlbändern eingesetzten Kokillen, wie beispielsweise der DE-C-36 40 096 zu entnehmen ist, aus gekühlten Breitseitenwänden und zwischen den Breitseitenwänden einklemmbaren Schmalseitenwänden, wobei die Schmalseitenwände zwecks Formatverstellung (Änderung der Brammenbreite) gegeneinander verschiebbar sind, und die Breitseitenwände an jedem Ende mittels lösbarer Klemmvorrichtungen gegen die Schmalseitenwände pressbar sind.Usually exist for the production of thin slabs or Steel strips used molds, such as DE-C-36 40 096 can be seen from cooled broad side walls and between the Wide side walls clampable narrow side walls, the Narrow side walls for format adjustment (changing the slab width) are mutually displaceable, and the wide side walls at each end can be pressed against the narrow side walls by means of releasable clamping devices are.
Um die Schmalseitenwände während des Gießprozesses zu verschieben, werden die Breitseitenwände um einen Betrag von etwa 0,3 bis 0,6 mm auseinander bewegt, was ein leicht durchführbares Verschieben der Schmalseitenwände ermöglicht.In order to move the narrow side walls during the casting process, the broad side walls are separated by an amount of about 0.3 to 0.6 mm moves, which is an easy to move the narrow side walls enables.
Durch hinter den Schmalseitenwänden angeordnete Distanzstücke, gegen die nach einem Vorschlag der DE-A-36 43 740 die Schmalseitenwände federnd abgestützt sind, wird diese Verschiebung der Schmalseitenwände deutlich erleichtert, da nur noch diese Distanzstücke von den Breitseitenwänden eingeklemmt werden.By spacers arranged behind the narrow side walls against which according to a proposal of DE-A-36 43 740, the narrow side walls are resilient supported, this shift in the narrow side walls becomes clear relieved, since only these spacers from the broad side walls be pinched.
Grundsätzlich besteht auch die Möglichkeit, die Breitseitenwände der Kokille in ihrem Abstand voneinander zu verändern, um die Brammendicke entsprechend zu verändern.Basically, there is also the possibility of the broad side walls of the Change the distance of the mold from one another to the slab thickness to change accordingly.
Wie in der CH-A-489298 beschrieben wird, kann eine derartige Verstellung vorgenommen werden, ohne die Kokille auszubauen, beispielsweise während des nicht zu umgehenden Stillstands der Stranggießanlage zwischen zwei Abgüssen. Der Verstellung der Kokillenweite folgt dann aber in jedem Fall zwingend ein Verstellen der der Kokille nachgeschalteten Führungs- und Transportrollen.Such an adjustment can be carried out as described in CH-A-489298 be made without removing the mold, for example during the unavoidable downtime of the continuous caster between two Castings. The adjustment of the mold width then follows in any case mandatory adjustment of the guide and downstream of the mold Transport rollers.
Zum Herstellen eines Stahlbandes durch Verformen eines gegossenen Stahlstranges bzw. einer Dünnbramme ist durch die EP-B1 0 326 190 eine Anlage bekannt geworden, die aus einer Stranggießmaschine mit einer oszillierenden Druchlaufkokille sowie gekühlten Wänden und einer am Kokillenauslauf angeordneten, ein Reduzierrollenpaar aufweisenden Verformungsvorrichtung für den Stahlstrang besteht. Das stranggegossene Stahlband, das sich aus einer erstarrten Strangschale und einem Flüssigkeitskern zusammensetzt, wird somit in einer Rollverformung dickenverringert und anschließend gewalzt. Die trichterförmige, oszillierende Durchlaufkokille besitzt einen Austrittsquerschnitt mit einer Dicke von 40 bis 50 mm, und nach dem Austritt aus der Kokille wird das gegossene Stahlband entsprechender Dicke durch das Reduzierrollenpaar soweit zusammengedrückt, dass die inneren Wandungen der in der Kokille bereits verfestigten Strangschalen miteinander verschweißen. Die Dickenreduzierung des noch nicht durcherstarrten Stahlstranges mit Hilfe des Reduzierrollenpaars der Verformungseinrichtung sowie mindestens eines diesem nachgeordneten Walzgerüstes ermöglichen es, Stahlbandstränge mit einer wesentlich unter 25 mm liegenden Dicke zu erreichen, was abhängig von der Gießgeschwindigkeit sowie der Presskraft des Reduzierrollenpaares ist. Infolge von geänderten Gießgeschwindigkeiten hinter dem Reduzierrollenpaar auftretende unterschiedliche Banddicken werden über angepasste Presskräfte der Reduzierrollen kompensiert. For producing a steel strip by deforming a cast one Steel strand or a thin slab is one by EP-B1 0 326 190 System known, which consists of a continuous casting machine with a oscillating continuous mold as well as cooled walls and an am Mold outlet arranged, having a pair of reducing rollers Deformation device for the steel strand exists. The continuously cast Steel band consisting of a solidified strand shell and a Liquid core is composed in a rolling deformation reduced in thickness and then rolled. The funnel-shaped, oscillating continuous mold has an outlet cross section a thickness of 40 to 50 mm, and after exiting the mold the cast steel strip of appropriate thickness through the pair of reducing rollers compressed so far that the inner walls of the in the mold weld strand shells that have already solidified. The Thickness reduction of the not yet solidified steel strand with the help the pair of reducing rollers of the deformation device and at least one this subordinate roll stand make it possible to use steel strip strands to achieve a thickness significantly less than 25 mm, which depends the casting speed and the pressing force of the pair of reducing rollers is. As a result of changed casting speeds behind the Reducing roller pair occurring different strip thicknesses are over adapted pressing forces of the reducing rollers compensated.
Bei Stranggießmaschinen mit zwischen Kokille und Strangführung angeordnetem Dickenreduzierrollensatz ist es zum Einfahren des Anfahrstranges mit einem der Kokillenweite entsprechenden Anfahrkopf erforderlich, die Strangführung und den Reduzierrollensatz auf die Anfahrkopfdicke einzustellen. Diese Einstellung muss beibehalten werden, bis nach dem Anfahren der Anfahrkopf mit dem erstarrten Gießstrangfuß den Reduzierollensatz passiert hat und ein aus Strangschale und flüssigem Kern bestehender Strangbereich von diesem verformt werden kann. Dabei muss die nachgeordnete Strangführung dem Wechel der Strangdicke mit größerem konstruktiven und steuerungstechnischen Aufwand angepasst werden.For continuous casting machines with between the mold and the strand guide arranged thickness reduction roller set, it is for retracting the Start-up line with a start-up head corresponding to the mold width required, the strand guide and the reducing roller set on the Adjust the starting head thickness. This setting must be maintained until after starting, the start-up head with the solidified cast strand foot Reduction roller set has passed and one from strand shell and liquid Core of existing strand area can be deformed by this. Here the subordinate strand guide must also change the strand thickness adapted to greater design and control engineering effort become.
Weiterhin wird in der EP-A-363 732 eine Anfahrvorrichtung für eine Stahlbandgießkokille, insbesondere für Stahlbänder unter 60 mm Dicke beschrieben, bestehend aus einer einstückigen Stahlplatte, die länger ist als der Abstand zwischen Kokillenabdichtbereich und gemeinsamer Achsebene des Rollen- oder Walzensatzes. Diese Anfahrvorrichtung wird in die Kokille herabgelassen, bis ihr Stütz- und Ausförderbereich vom ersten Walzen- oder Rollenpaar erfasst wird und die Oberkante des Abdichtbereichs mit der Abdichtebene der Kokille übereinstimmt. Nach dem Angießen und Bildung einer belastbaren Verbindung zwischen der Anfahrvorrichtung und dem gegossenen Stahlband erfolgt die Ausförderung durch das Rollen- oder Walzenpaar. Auch bei diesem bekannten Verfahren ist eine nachfolgende Anpassung der Strangführung an den sich einstellenden Wechsel der Strangdicke erforderlich.Furthermore, in EP-A-363 732 a starting device for a Steel strip casting mold, especially for steel strips with a thickness of less than 60 mm described, consisting of a one-piece steel plate, which is longer than the distance between the mold sealing area and the common axis plane of the roller or roller set. This starting device is in the Lowered mold until its support and discharge area from the first Roll or roller pair is detected and the upper edge of the Sealing area coincides with the sealing level of the mold. After this Casting on and forming a resilient connection between the The starting device and the cast steel belt are conveyed out through the pair of rollers or rollers. Even with this known method is a subsequent adjustment of the strand guide to itself setting change of strand thickness required.
Der Erfindung liegt die Aufgabe zugrunde, ein betriebssicheres Verfahren zur Herstellung von Dünnbrammen oder Stahlbändern hoher Qualität durch Stranggießen und anschließende Rollverformung zu schaffen, wobei eine Dickenänderung des Stranges möglich ist. Insbesondere soll der Gießbeginn mit geringem konstruktiven und steuerungstechnischen Aufwand durchführbar sein und der angießbedingte Schrottanfall verringert werden.The invention has for its object an operationally reliable method for the production of thin slabs or steel strips of high quality Continuous casting and subsequent roll forming to create a Change in thickness of the strand is possible. In particular, the start of the casting should can be carried out with little design and control effort and the amount of scrap caused by casting on is reduced.
Die gestellte Aufgabe wird bei einem Verfahren der angegebenen Gattung erfindungsgemäß dadurch erreicht, dass bei Gießbeginn ein Strang mit einer etwa dem Fertigmaß-Rollenspalt des Quetschwalzenpaares entsprechender Dicke, die der Dicke des Anfahrstranges entspricht, gegossen wird, der aus erstarrter Strangschale und flüssigem Kern bestehende Strang zwischen die Quetschwalzen geführt wird und, sobald der gegossene Strang das Quetschwalzenpaar und die darunter angeordneten Führungsrollen erreicht, die Gießdicke des Stranges kontinuierlich vergrößert und der dickere Gießstrang zwischen den Pressrollen auf das Fertigmaß rollverformt wird.The task is given in a method of the type specified achieved according to the invention in that a strand with at the start of casting one about the finished size roller gap of the pair of squeeze rollers corresponding thickness, which corresponds to the thickness of the starting strand, is poured, the solidified strand shell and liquid core existing strand is guided between the nip rollers and as soon as the cast strand, the pair of squeeze rollers and the ones arranged underneath Leadership roles achieved that Casting thickness of the strand increases continuously and the thicker casting strand between the press rolls to the finished size is roll deformed.
Durch die enge Stellung der Kokille kann der Angießvorgang mit einem dünnen Anfahrstrang schnell und betriebssicher durchgeführt werden. Eine Verstellung der nachgeordneten Rollenführung ist beim Angießen nicht erforderlich. Der Schrottanfall ist aufgrund des schmalen Anfangsquerschnitts und ohne ein längeres Übergangsstück gering.Due to the close position of the mold, the casting process can be carried out with carried out quickly and reliably using a thin start-up line become. An adjustment of the subordinate role guidance is not necessary when pouring. The amount of junk is due to the narrow initial cross section and small without a longer transition piece.
Die Erfindung schlägt weiter vor, daß die Gießdicke des Stranges bei Gießbeginn 40 - 60 mm und danach 60 - 80 mm beträgt und der fertige Dünnbrammen- oder Stahlbandstrang von der Strangspitze an eine einheitliche Fertigdicke im Bereich von 40 - 60 mm aufweist.The invention further proposes that the casting thickness of the strand at the start of casting is 40 - 60 mm and then 60 - 80 mm and the finished thin slab or steel strip strand from the Strand tip to a uniform finished thickness in the area 40 - 60 mm.
Nach der Vergrößerung der Gießdicke kann die Gießbreite des Brammenstranges eingestellt werden.After increasing the casting thickness, the casting width of the Slab strand can be set.
In vorrichtungsmäßiger Ausgestaltung der Erfindung besteht eine Anlage zur Durchführung des Verfahrens aus einer aus gekühlten Breitseitenwänden und Schmalseitenwänden gebildeten Dünnbrammenkokille und mindestens einem nachgeordneten Quetschwalzenpaar, wobei Zwei an den Breitseitenwänden anliegende Führungsprofile je eine Führungsöffnung für je eine Schmalseitenwand aufweisen, die aus einer seitlichen Anlageposition an den Breitseitenwänden zwischen die Breitseitenwände verschiebbar ist und die Breitseitenwände aus einer engen Abstandsposition in eine weitere Abstandsposition definiert verstellbar sind. In a device-like embodiment of the invention a plant to carry out the process from a cooled broad side walls and narrow side walls formed Thin slab mold and at least one downstream pair of squeeze rollers, whereby two abut the broad side walls Guide profiles one guide opening each for one narrow side wall have from a lateral investment position slidable on the broad side walls between the broad side walls and the broad side walls from a narrow spacing position defined in a further distance position are adjustable.
Die Breitseitenwände können einen erweiterten Eingießbereich bilden, der in Gießrichtung auf das Format des gegossenen Stranges reduziert ist.The wide side walls can have an extended pouring area form the in the casting direction to the format of the cast Stranges is reduced.
In der Zeichnung ist eine Anlage zur Durchführung des erfindungsgemäßen Verfahrens mit Merkmalen und Vorteilen desselben dargestellt. Es zeigen
- Fig. 1
- eine Prinzipdarstellung der Anlage bei Gießbeginn,
- Fig. 2
- die Anlage beim Gießen und Quetschen eines Brammenstranges,
- Fig. 3
- die Draufsicht auf die Stranggießkokille, und
- Fig. 4 - 6
- vergrößerte Ausschnitte aus Fig. 3 mit unterschiedlichen Einstellungen der Kokillenwände.
- Fig. 1
- a schematic diagram of the system at the start of casting,
- Fig. 2
- the system when pouring and squeezing a strand of slab,
- Fig. 3
- the top view of the continuous casting mold, and
- 4 - 6
- 3 enlarged sections with different settings of the mold walls.
Eine Kokille 1 zum Stranggießen von Dünnbrammen 2 besteht
aus zwei gekühlten Breitseitenwänden 3 und zwei Schmalseitenwänden
4. Die Breitseitenwände 3 bilden zur Aufnahme eines
Tauchgießrohres 5 einen erweiterten oberen Eingießbereich 6.
Der Kokille 1 ist ein Quetschwalzenpaar 7 und im Anschluß
daran gegenüberliegend gelagerte Führungsrollen 8 nachgeordnet.
(Fig. 1 und 2)There is a mold 1 for the continuous casting of
Gemäß Fig. 3 sind die Breitseitenwände 3 der Kokille 1 an je
einem seitlichen Rahmenteil 9 befestigt, die durch Spindeltriebe
10 in ihrem gegenseitigen Abstand verstellbar sind. 3, the
Zwischen den Seitenbereichen der Rahmenteile 9 befindet sich
ein Vorsprung 11 je eines Kopfstückes 12 in dem Spindeln 13
der Spindeltriebe 10 gelagert sind.Is located between the side areas of the frame parts 9
a
Am Kopfstück 12 ist ein U-förmiges Führungsprofil 14 befestigt,
in dem ein Tragelement 15 der Schmalseitenwand 4 in Richtung
des Pfeiles 16 verschiebbar geführt ist. Das Führungsprofil
14 befindet sich stirnseitig an den Seitenflächen der Breitseitenwände
3 in Anlage. Die Schmalseitenwand 4 durchdringt
das Führungsprofil 14 und bildet die Formwandung.A U-shaped
Das erfindungsgemäße Verfahren wird anhand der Zeichnung wie
folgt beschrieben. Die Vorbereitung der Anlage zum Angießen
eines Brammenstranges 2 erfolgt durch Einstellen von Kokillenweite,
Quetschwalzenspalt und Führungsrollenabstand auf das
Dickenmaß des mit Verbindungskopf 17 versehenen Anfahrstranges
18 von z.B. 50 mm. Bei dieser aus den Figuren 1 und 4 ersichtlichen
Einstellung stehen die Schmalseitenwände 4 in seitlicher
Anlage an den Breitseitenwänden 3. Nach dem Einfahren des
Anfahrstranges 18 in der Kokille 1 wird die Stahlschmelze
durch Tauchgießrohr 5 in die Kokille 1 geleitet. Die Stahlschmelze
erstarrt an den gekühlten Kokillenwänden zur Strangschale
19 und bildet mit dem Verbindungskopf 17 des Anfahrstranges
18 eine Angießverbindung.The method according to the invention is how
described below. The preparation of the system for pouring
a
Sobald der gegossene Brammenstrang 2 das Quetschrollenpaar 7
und die Führungsrollen 8 erreicht, werden die Breitseitenwände
3 durch die Spindeltriebe 10 auf die in Fig. 2 und 5 dargestellte
größere Weite von z.B. 70 mm eingestellt. Der infolge
dieser Einstellung gegossene dickere Brammenstrang 2a wird
durch die mit unverändertem Walzspalt eingestellten Quetschrollen
7 durch Zusammenpressen der gegenüberliegenden Strangschalen
19 auf 50 mm Dicke reduziert und wird bis zur völligen
Durcherstarrung von den Führungsrollen 8 geführt.As soon as the
Eine Breitenverstellung des gegossenen Brammenstranges 2a
wird gemäß Fig. 6 durch eine Querverstellung der Schmalseitenwände
4 zwischen den Breitseitenwänden 3 in Richtung des
Pfeiles 16 erreicht. Dabei symbolisiert das Übertragungselement
20 den Verstellantrieb.A width adjustment of the cast
Claims (5)
- Method of producing thick slabs or steel strips, wherein a slab strip cast in a chill mould formed from cooled, adjustable wide side walls and displaceable narrow side walls is reduced in thickness by at least one squeezing roll pair arranged downstream of the chill mould, characterised in that at the start of casting a strip (2) is cast with a thickness which corresponds approximately with the finished dimension of the rolling gap of the squeezing roll pair (7) and which corresponds with the thickness of the starting strip (18), the strip (2) consisting of hardened strip skin (19) and liquid core is guided between the squeezing rolls (7) and, as soon as the cast strip (2) has reached the squeezing roll pair (7) and the guide rolls (8) arranged thereunder, the cast thickness of the strip (2) is continuously increased by adjustment of the wide side walls (3) of the chill mould (1) and the now thicker cast strip (2a) is deformed to the finished dimension by rolling between the squeezing roll pair (7) set with unchanged rolling gap.
- Method according to claim 1, characterised in that the casting thickness of the strip (2) at the start of casting amounts to 40 to 60 mm and thereafter (2a) to 60 to 80 mm and the finished thick slab strip or steel strip has a uniform finished thickness in the region of 40 to 60 mm from the strip tip.
- Method according to claim 1, characterised in that the casting width of the slab strip (2a) is set after the increase in the casting thickness.
- Plant for carrying out the method according to one or more of claims 1 to 3, which consists of a thick slab chill mould consisting of cooled, adjustable wide side walls and displaceable narrow side walls and at least one squeezing roll pair arranged downstream, characterised in that two guide profiles (14) lying at the wide side walls (3) each have a respective guide opening for a narrow side wall (4), which is displaceable between the wide side walls (3) from a lateral position bearing against the wide side walls, and that the wide side walls (3) are adjustable in defined manner from a narrow spacing position into a wider spacing position.
- Plant according to claim 4, characterised in that the wide side walls (3) of the thick slab chill mould form a widened pouring-in region (6) which is reduced in pouring-in direction to the format of the cast strip (2, 2a).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19519560A DE19519560A1 (en) | 1995-05-27 | 1995-05-27 | Process for the production of thin slabs or steel strips |
| DE19519560 | 1995-05-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0745444A1 EP0745444A1 (en) | 1996-12-04 |
| EP0745444B1 true EP0745444B1 (en) | 1999-12-29 |
Family
ID=7763073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96107187A Expired - Lifetime EP0745444B1 (en) | 1995-05-27 | 1996-05-07 | Method and installation for producing thin slabs or sheets of steel |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0745444B1 (en) |
| AT (1) | ATE188150T1 (en) |
| DE (2) | DE19519560A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018203218A1 (en) | 2018-03-05 | 2019-09-05 | Sms Group Gmbh | Roll stand for a hot rolling mill |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1608346C3 (en) * | 1968-03-19 | 1974-11-07 | Mannesmann Ag, 4000 Duesseldorf | Adjustable continuous casting mold |
| DE3640096C1 (en) * | 1986-11-24 | 1988-04-28 | Voest Alpine Ag | Continuous casting mould |
| DE3643740A1 (en) * | 1986-12-20 | 1988-06-30 | Schloemann Siemag Ag | STEEL MOLDING CHOCOLATE |
| EP0286862B1 (en) * | 1987-04-13 | 1992-05-13 | Thyssen Stahl Aktiengesellschaft | Process for manufacturing a steel strip |
| DE3834410A1 (en) * | 1988-10-10 | 1990-04-12 | Schloemann Siemag Ag | START-UP DEVICE FOR A STEEL TAPE CASTING SYSTEM |
| JP2639758B2 (en) * | 1991-08-01 | 1997-08-13 | 新日本製鐵株式会社 | How to start slab continuous casting |
| JPH05245590A (en) * | 1992-03-04 | 1993-09-24 | Sumitomo Heavy Ind Ltd | Cast slab thickness variable mold for continuous casting |
| DE4307464C2 (en) * | 1993-03-10 | 2001-04-12 | Sms Demag Ag | CSP continuous casting machine for the continuous production of thin slabs from steel |
| DE4337399C2 (en) * | 1993-10-26 | 1995-08-17 | Mannesmann Ag | Continuous casting mold for the production of thin slabs, plates or sheets made of steel |
-
1995
- 1995-05-27 DE DE19519560A patent/DE19519560A1/en not_active Withdrawn
-
1996
- 1996-05-07 AT AT96107187T patent/ATE188150T1/en not_active IP Right Cessation
- 1996-05-07 DE DE59604007T patent/DE59604007D1/en not_active Expired - Fee Related
- 1996-05-07 EP EP96107187A patent/EP0745444B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| ATE188150T1 (en) | 2000-01-15 |
| DE19519560A1 (en) | 1996-11-28 |
| EP0745444A1 (en) | 1996-12-04 |
| DE59604007D1 (en) | 2000-02-03 |
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