EP0353402B1 - Method for producing steel strip with a thickness of less than 10 mm - Google Patents
Method for producing steel strip with a thickness of less than 10 mm Download PDFInfo
- Publication number
- EP0353402B1 EP0353402B1 EP89108232A EP89108232A EP0353402B1 EP 0353402 B1 EP0353402 B1 EP 0353402B1 EP 89108232 A EP89108232 A EP 89108232A EP 89108232 A EP89108232 A EP 89108232A EP 0353402 B1 EP0353402 B1 EP 0353402B1
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- European Patent Office
- Prior art keywords
- strand
- thickness
- solidified
- cast
- ingot mould
- 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.)
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Classifications
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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
- 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
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- 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
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- 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
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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
- B21B2001/228—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 skin pass rolling or temper rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2201/00—Special rolling modes
- B21B2201/14—Soft reduction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2201/00—Special rolling modes
- B21B2201/18—Vertical rolling pass lines
Definitions
- the invention relates to a method for producing a steel strip with a thickness of less than 10 mm by casting a strand in a cooled continuous mold and then compressing the strand which has not yet solidified and which emerges from the mold until the inner walls of the strand shell which has already solidified are welded.
- the pre-strip produced in the conventional manner is cooled and, after it has completely solidified, divided into pieces of suitable length or wound up into a strip.
- the bundle is heat-treated in a temporary storage furnace and set to a uniform temperature.
- the tape is rolled out in several embroidery. Because of the necessary intermediate storage furnace and the large number of roll stands for rolling out, the effort for rolling thin strips is still great.
- a further disadvantage with such a rolling out after the strip has been heated up is that the strip scales on the surface. This makes perfect hot rolling difficult.
- a method for producing thin strips in a continuous mold in which the strand which has not yet solidified is pressed together by two squeezing rollers forming the mold outlet to such an extent that the inner sides of the solidified strand shells touch one another.
- the thickness of the tape thus produced corresponds to the sum of the thicknesses of the strand shells.
- the mold emerging solidified strand shells can be reduced in thickness immediately after leaving the mold in the same operation by compressing the cast strand with a degree of deformation of more than 40%.
- Such a reduction in thickness can be achieved with a rolling stand arranged at the mold outlet, in particular a horizontally driven four-high stand.
- a thin strip can be produced from the steel rod that has not yet solidified from the mold and can be wound into coils or further processed immediately after appropriate cooling.
- the production of steel strips using the method according to the invention is extremely inexpensive, since no large plants with heating furnaces and roll stands with a corresponding energy requirement are required.
- the various parameters for casting the steel strand on the one hand and for reducing the thickness of the strand shells on the other hand are matched to one another in such a way that the steel strand can be pressed together without breakthroughs and the strand shells can withstand the considerable deformations when reducing the thickness. It has proven to be particularly advantageous if the casting speed and / or the cooling intensity of the mold is controlled in such a way that the steel strand has a strand shell with a thickness of 5-10 mm when it emerges from the mold. In this way it is ensured that the strand shell is resistant enough to withstand the forces occurring during the deformation without the formation of cracks.
- the compressed strand shells are pressed together after the cast strand emerges from the continuous mold at the highest possible temperatures.
- Good results have been achieved if the surface temperature of the cast strand is more than 1100 ° C., preferably 1200 ° C. to 1400 ° C., in particular 1300 ° C. It has been shown that it is advantageous if there is a temperature gradient in the strand shell perpendicular to the strand surface, which is determined by the strand surface temperature and a temperature close to the solidus temperature in the interior of the cast strand. Since all steel grades are highly resilient at a temperature of more than 1200 ° C, cracks in the strand skin during deformation are avoided if the aforementioned temperatures are observed.
- the strand shells For the formation of a particularly good structure of the rolled strip, it is further advantageous to reduce the strand shells with a degree of deformation of 50-80% in thickness when the cast strand is compressed. For some applications and / or for some steel grades, it may be advantageous to improve the surface quality by re-rolling the strips with a degree of deformation of less than 5%. It is also possible to provide the belt with a contour.
- a first reduction in the thickness of the cast strand is already carried out in the continuous mold.
- the strand shells which form on the broad sides of the continuous mold are brought together at least in the central region by a corresponding design of the funnel-shaped region of the continuous mold while the cast strand is being pulled out.
- the cooling of the continuous mold is adjusted in such a way that the formation of the strand shells begins in the funnel-shaped area. so that a strand with a still molten core is formed there. It is important that the strand shell is only formed with a thickness at which a merging is still possible.
- an oscillating mold 2 which consists of a funnel-shaped upper part and a lower part with cooling walls arranged in parallel, the spacing of which is selected according to the thickness of the strand to be cast.
- the solidifying strand shells are already brought together in the funnel-shaped region when the cast strand is pulled out, as a result of which a first reduction in the thickness of the cast strand is achieved.
- a roll stand 3 with which the solidified strand shells are pressed together, welded together and reduced in thickness.
- the rolling stand is, for example, a horizontally arranged four-high stand, the driven work rolls 3a of which can be adjusted by means of hydraulic cylinders for the compression and reduction of the thickness of the strand 10.
- the driven work rolls 3a of which can be adjusted by means of hydraulic cylinders for the compression and reduction of the thickness of the strand 10.
- the diameter d of the work rolls 3a should be between 0.5 and 1 m, while the distance D of the beginning of the area of attack from the lower edge of the mold 2 should be less than 0.5 m.
- the roll stand 3 can be followed by a roll stand 5 behind an arch guide 4, with which the solidified cast strand is trained with a low degree of deformation of about 5%.
- a cooling device 6, scissors 7 and a reel 8 for winding the strip 9 are provided behind the roll stand 5.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Continuous Casting (AREA)
Description
Die Erfindung bezieht sich auf ein Verfahren zum Herstellen eines Stahlbandes mit einer Dicke von unter 10 mm durch Gießen eines Stranges in einer gekühlten Durchlaufkokille und anschließendem Zusammendrücken des aus der Kokille austretenden noch nicht durcherstarrten Stranges bis zum Verschweißen der inneren Wandungen der bereits verfestigten Strangschale.The invention relates to a method for producing a steel strip with a thickness of less than 10 mm by casting a strand in a cooled continuous mold and then compressing the strand which has not yet solidified and which emerges from the mold until the inner walls of the strand shell which has already solidified are welded.
Bei einem bekannten Verfahren dieser Art ("Patent Abstracts of Japan", Band 8, Nr. 210 (M-328) 1647, September 26, 1984; JP-A-5997747 (A)) werden die bereits verfestigten Strangschalen des aus der Kokille austretenden noch nicht erstarrten Stahlstranges so weit zusammengedrückt, bis die Dicke des Bandes etwa gleich der doppelten Dicke der bereits verfestigten Strangschale ist. Um dabei ein sicheres Verschweißen der Strangschalen zu gewährleisten, kann gemäß diesem bekannten Verfahren auf die Strangschalen ein derartiger Druck ausgeübt werden, daß der aus den Quetschrollen austretende Strang gleich der Summe der der Dicken der beiden Strangschalen ist.In a known method of this type ("Patent Abstracts of Japan",
Durch diese an sich bekannte Maßnahme, die beim Stranggießen zur Erzielung lunkerfreier Stränge angewandt wird, werden allerdings nur Bänder mit einer Dicke von 20 - 50 mm erreicht. Für eine Vielzahl von Anwendungsfällen sind solche Bänder allerdings zu dick. Bänder mit einer Dicke von 20 - 50 mm lassen sich jedoch in herkömmlichen Kaltwalzwerken nicht bis auf die gewünschte kleinste Dicke von etwa 2 mm herunterwalzen.This measure, which is known per se and which is used in continuous casting to achieve void-free strands, only achieves strips with a thickness of 20-50 mm. However, such tapes are too thick for a large number of applications. However, strips with a thickness of 20 - 50 mm cannot be rolled down to the desired minimum thickness of about 2 mm in conventional cold rolling mills.
Zur Herstellung von Bändern mit geringer Dicke wird das nach herkömmlicher Weise hergestellte Vorband gekühlt und nach vollständiger Durcherstarrung in Stücke geeigneter Länge unterteilt oder zu einem Band aufgewickelt. Zur Vorbereitung auf das anschließende Auswalzen zu dünnem Band wird der Bund in einem Zwischenspeicherofen wärmebehandelt und auf eine gleichmäßige Temperatur eingestellt. Das Auswalzen des Bandes erfolgt in mehreren Sticken. Wegen des notwendigen Zwischenspeicherofens und der Vielzahl der Walzgerüste für das Auswalzen ist der Aufwand zum Walzen von dünnen Bändern nach wie vor groß. Ein weiterer Nachteil bei einem derartigen Auswalzen nach dem Aufheizen des Bandes besteht darin, daß das Band an der Oberfläche verzundert. Dadurch wird ein einwandfreies Warmwalzen erschwert. Zur Herstellung von Strängen von beispielsweise 80 mm Kantenlänge ist es bekannt (GB-A 1189731; US-A- 3491823), die eine Kokille verlassenden Stränge vor der Durcherstarrung im Querschnitt mit einem Verformungsgrad des verfestigten Teiles von mehr als 20 % zu reduzieren. Ziel dieser Querschnittsverminderung ist es, Fehler wie Seigerungen und dergleichen im Strang, die bei der Durcherstarrung unter Kühlung entstehen können, zu vermeiden.To produce tapes with a small thickness, the pre-strip produced in the conventional manner is cooled and, after it has completely solidified, divided into pieces of suitable length or wound up into a strip. In preparation for the subsequent rolling out into thin strips, the bundle is heat-treated in a temporary storage furnace and set to a uniform temperature. The tape is rolled out in several embroidery. Because of the necessary intermediate storage furnace and the large number of roll stands for rolling out, the effort for rolling thin strips is still great. A further disadvantage with such a rolling out after the strip has been heated up is that the strip scales on the surface. This makes perfect hot rolling difficult. For the production of strands of, for example, 80 mm edge length, it is known (GB-A 1189731; US-A-3491823) to reduce the strands leaving a mold in cross-section before solidification with a degree of deformation of the solidified part of more than 20%. The aim of this reduction in cross-section is to avoid errors such as segregations and the like in the strand, which can occur during solidification under cooling.
Ferner ist ein Verfahren zum Herstellen von dünnen Bändern in einer Durchlaufkokille bekannt (GB-A 1199805), bei dem der noch nicht durcherstarrte Strang von zwei den Kokillenausgang bildenden Quetschrollen so weit zusammengedrückt wird, daß die Innenseiten der erstarrten Strangschalen einander berühren. Die Dicke des so erzeugten Bandes entspricht also der Summe der Dicken der Strangschalen.Furthermore, a method for producing thin strips in a continuous mold is known (GB-A 1199805), in which the strand which has not yet solidified is pressed together by two squeezing rollers forming the mold outlet to such an extent that the inner sides of the solidified strand shells touch one another. The thickness of the tape thus produced corresponds to the sum of the thicknesses of the strand shells.
Es ist daher Aufgabe der Erfindung, ein Verfahren und eine Anlage anzugeben, mit welchem beziehungsweise mit welcher qualitativ hochwertige Stahlbänder mit einer Dicke von 1 - 10 mm auf einfache Art und Weise hergestellt werden können.It is therefore an object of the invention to provide a method and a system with which or with which high-quality steel strips with a thickness of 1-10 mm can be produced in a simple manner.
Diese Aufgabe wird bei einem Verfahren der eingangs genannten Art dadurch gelöst, daß die aus der Kokille austretenden verfestigten Strangschalen unmittelbar nach Verlassen der Kokille im gleichen Arbeitsgang mit dem Zusammendrücken des Gußstranges mit einem Verformungsgrad von mehr als 40 % in der Dicke reduziert werden. Eine solche Dickenreduzierung läßt sich mit einem am Kokillenauslauf angeordneten Walzgerüst, insbesondere einem horizontalliegenden angetriebenen Quartogerüst verwirklichen.This object is achieved in a method of the type mentioned in that the mold emerging solidified strand shells can be reduced in thickness immediately after leaving the mold in the same operation by compressing the cast strand with a degree of deformation of more than 40%. Such a reduction in thickness can be achieved with a rolling stand arranged at the mold outlet, in particular a horizontally driven four-high stand.
Mit dem erfindungsgemäßen Verfahren läßt sich in einem einzigen Arbeitsgang aus dem aus der Kokille austretenden noch nicht durcherstarrten Stahlstang ein dünnes Band herstellen, das unmittelbar nach entsprechender Kühlung zu Bunden gewickelt oder weiterverarbeitet werden kann. Die Herstellung von Stahlbändern mit dem erfindungsgemäßen Verfahren ist äußerst günstig, da keine großen Anlagen mit Wärmeöfen und Walzgerüsten mit entsprechendem Energiebedarf erforderlich sind.With the method according to the invention, a thin strip can be produced from the steel rod that has not yet solidified from the mold and can be wound into coils or further processed immediately after appropriate cooling. The production of steel strips using the method according to the invention is extremely inexpensive, since no large plants with heating furnaces and roll stands with a corresponding energy requirement are required.
Bei der Erfindung sind die verschiedenen Parameter beim Gießen des Stahlstranges einerseits und beim Dickenreduzieren der Strangschalen andererseits derart aufeinander abgestimmt, daß der Stahlstrang ohne Durchbrüche zusammengedrückt werden kann und die Strangschalen die erheblichen Verformungen bei der Dickenreduktion aushalten können. Es hat sich als besonders vorteilhaft erwiesen, wenn die Gießgeschwindigkeit und/oder die Kühlintensität der Kokille derart geregelt wird, daß der Stahlstrang bei Austritt aus der Kokille eines Strangschale mit einer Dicke von 5 - 10 mm aufweist. Auf diese Weise ist gewährleistet, daß die Strangschale widerstandsfähig genug ist, um die bei der Verformung auftretenden Kräfte ohne Bildung von Rissen aushalten zu können.In the invention, the various parameters for casting the steel strand on the one hand and for reducing the thickness of the strand shells on the other hand are matched to one another in such a way that the steel strand can be pressed together without breakthroughs and the strand shells can withstand the considerable deformations when reducing the thickness. It has proven to be particularly advantageous if the casting speed and / or the cooling intensity of the mold is controlled in such a way that the steel strand has a strand shell with a thickness of 5-10 mm when it emerges from the mold. In this way it is ensured that the strand shell is resistant enough to withstand the forces occurring during the deformation without the formation of cracks.
Für eine gleichmäßige Verformung des Gießstranges und eine gute Gefügeausbildung hat es sich als zweckmäßig erwiesen, wenn das Zusammendrücken der verfestigten Strangschalen nach Austritt des Gußstrangs aus der Durchlaufkokille bei möglichst hohen Temperaturen durchgeführt wird. Gute Ergebnisse wurden erzielt, wenn die Oberflächentemperatur des Gußstranges mehr als 1100°C, vorzugsweise 1200°C bis 1400°C, insbesondere 1300°C beträgt. Es hat sich gezeigt, daß es vorteilhaft ist, wenn in der Strangschale ein Temperaturgradient senkrecht zur Strangoberfläche besteht, der bestimmt wird durch die Strangoberflächentemperatur und eine Temperatur nahe der Solidus-Temperatur im Inneren des Gußstranges. Da alle Stahlqualitäten bei einer Temperatur von mehr als 1200°C hoch belastbar sind, werden bei Einhaltung der vorgenannten Temperaturen Risse in der Stranghaut während der Verformung vermieden.For a uniform deformation of the casting strand and a good microstructure, it has proven to be useful if the compressed strand shells are pressed together after the cast strand emerges from the continuous mold at the highest possible temperatures. Good results have been achieved if the surface temperature of the cast strand is more than 1100 ° C., preferably 1200 ° C. to 1400 ° C., in particular 1300 ° C. It has been shown that it is advantageous if there is a temperature gradient in the strand shell perpendicular to the strand surface, which is determined by the strand surface temperature and a temperature close to the solidus temperature in the interior of the cast strand. Since all steel grades are highly resilient at a temperature of more than 1200 ° C, cracks in the strand skin during deformation are avoided if the aforementioned temperatures are observed.
Für die Ausbildung eines besonders guten Gefüges des gewalzten Bandes ist es weiter von Vorteil, die Strangschalen beim Zusammendrücken des Gußstranges mit einem Verformungsgrad von 50 - 80 % in der Dicke zu reduzieren. Für manche Anwendungsfälle und/oder bei einigen Stahlqualitäten kann es zur Verbesserung der Oberflächenbeschaffenheit vorteilhaft sein, die Bänder zusätzlich mit einem Verformungsgrad von kleiner als 5% nachzuwalzen. Es ist auch möglich, das Band hierbei mit einer Kontur zu versehen.For the formation of a particularly good structure of the rolled strip, it is further advantageous to reduce the strand shells with a degree of deformation of 50-80% in thickness when the cast strand is compressed. For some applications and / or for some steel grades, it may be advantageous to improve the surface quality by re-rolling the strips with a degree of deformation of less than 5%. It is also possible to provide the belt with a contour.
Nach einer Ausgestaltung der Erfindung wird eine erste Dickenreduktion des Gußstranges bereits in der Durchlaufkokille durchgeführt. Zu diesem Zweck werden die an den Breitseiten der Durchlaufkokille sich bildenden Strangschalen zumindest im Mittelbereich durch eine entsprechende Ausbildung des trichterförmigen Bereichs der Durchlaufkokille während des Auszuges des Gußstranges zusammengeführt. Dabei wird die Kühlung der Durchlaufkokille derart eingestellt, daß die Bildung der Strangschalen bereits im trichterförmigen Bereich beginnt, so daß bereits dort ein Strang mit noch schmelzflüssigem Kern gebildet wird. Dabei kommt es darauf an, daß die Strangschale sich nur mit einer Dicke ausbildet, bei der ein Zusammenführen noch möglich ist.According to one embodiment of the invention, a first reduction in the thickness of the cast strand is already carried out in the continuous mold. For this purpose, the strand shells which form on the broad sides of the continuous mold are brought together at least in the central region by a corresponding design of the funnel-shaped region of the continuous mold while the cast strand is being pulled out. The cooling of the continuous mold is adjusted in such a way that the formation of the strand shells begins in the funnel-shaped area. so that a strand with a still molten core is formed there. It is important that the strand shell is only formed with a thickness at which a merging is still possible.
Im folgenden wird die Erfindung anhand einer ein Ausführungsbeispiel einer Anlage zum Herstellen eines Stahlbandes schematisch darstellenden Zeichnung näher erläutert. Im einzelnen zeigen:
- Fig. 1 eine Anlage zur Durchführung des Verfahrens in Seitenansicht
und - Fig. 2 ein Detail der Anlage gemäß Fig. 1 im Bereich zwischen der Kokille zum Stranggießen und dem Walzgerüst in zu Fig. 1 vergrößerter Darstellung.
- Fig. 1 shows a plant for performing the method in side view
and - Fig. 2 shows a detail of the system of FIG. 1 in the area between the mold for continuous casting and the rolling stand in an enlarged view to FIG. 1.
Aus dem Tundish 1 fließt schmelzflüssiger Stahl in eine oszillierende Kokille 2, die aus einem trichterförmigen Oberteil und einem Unterteil mit parallel angeordneten gekühlten Wänden besteht, deren Abstand entsprechend der Dicke des zu gießenden Stranges gewählt wird. Infolge der trichterförmigen Ausbildung der Kokille werden bereits im trichterförmigen Bereich die erstarrenden Strangschalen beim Auszug des Gußstranges zusammengeführt, wodurch eine erste Dickenreduzierung des Gußstranges erzielt wird. Unmittelbar am Kokillenauslauf befindet sich ein Walzgerüst 3, mit dem die erstarrten Strangschalen zusammengedrückt, miteinander verschweißt und in der Dicke reduziert werden. Das Walzgerüst ist beispielsweise ein horizontal angeordnetes Quartogerüst, dessen angetriebene Arbeitswalzen 3a für das Zusammendrücken und Dickenreduzieren des Stranges 10 mittels hydraulischer Zylinder verstellbar sind. Im Bereich der Arbeitswalzen 3a sollten den Schmalseiten profilbestimmende Stützrollen zugeordnet sein. Der Durchmesser d der Arbeitswalzen 3a sollte zwischen 0,5 und 1 m liegen, während der Abstand D des Anfangs des Angriffsbereichs von der Unterkante der Kokille 2 kleiner als 0,5 m sein sollte. Diese Verhältnisse sind in Figur 2 dargestellt.Molten steel flows from the tundish 1 into an oscillating
Dem Walzgerüst 3 kann hinter einer Bogenführung 4 ein Walzgerüst 5 nachgeordnet sein, mit dem mit geringem Verformungsgrad von etwa 5 % der durcherstarrte Gußstrang dressiert wird. Hinter dem Walzgerüst 5 sind eine Kühlvorrichtung 6, eine Schere 7 und eine Haspel 8 zum Aufwickeln des Bandes 9 vorgesehen.The
Claims (6)
- A process for the production of a steel strip (9) having a thickness of less than 10 mm by the casting of a steel strand in a cooled continuous ingot mould (2), whereafter the not yet completely solidified steel strand withdrawn from the ingot mould is compressed (3) up to the welding of the inner walls of the already solidified strand shell, characterized in that the thickness of the solidified strand shells immediately after emerging from the mould (2) is reduced in the same operation as the compression of the cast strand with a degree of deformation of > 40%.
- A method according to claim 1, characterized in that the thickness of the solidified strand shells is reduced together with the compression (3) of the cast strand with a degree of deformation of 50 - 80%.
- A method according to claims 1 or 2, characterized in that for the purpose of reducing the thickness of the cast strand, the strand shells solidifying on the wide sides of the continuous ingot mould (2) are moved together by a funnel-shaped construction of the continuous ingot mould (2) during the withdrawal of the cast strand therefrom.
- A method according to any of claims 1 to 3, characterized in that the cooling of the continuous ingot mould (2) is so adjusted that on withdrawal from the ingot mould (2) and prior to compression (3, 3a), the cast strand has a surface temperature of 1100°C to 1400°C, more particularly 1300°C.
- A method according to any of claims 1 to 4, characterized in that following compression (3), the cast strand is rerolled with a degree of deformation of about 5%.
- A method according to claim 5, characterized in that the cast strand is contoured during rerolling (5).
Priority Applications (12)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT89108232T ATE81042T1 (en) | 1988-07-14 | 1989-05-08 | PROCESS FOR MAKING A STEEL STRIP WITH A THICKNESS LESS THAN 10 MM. |
| BR898907544A BR8907544A (en) | 1988-07-14 | 1989-06-29 | PROCESS FOR THE PRODUCTION OF A STEEL TAPE WITH A THICKNESS OF LESS THAN 10 MM |
| JP50699589A JPH04500478A (en) | 1988-07-14 | 1989-06-29 | Method for producing steel strip with a thickness of less than 10 mm |
| KR1019900700513A KR900701438A (en) | 1988-07-14 | 1989-06-29 | Manufacturing method of steel strip with thickness less than 10mm |
| NZ22985189A NZ229851A (en) | 1988-07-14 | 1989-07-06 | Producing steel strip of less than 10 mm thickness |
| AU37946/89A AU620419B2 (en) | 1988-07-14 | 1989-07-07 | Method of producing a steel strip having a thickness of less than 10 mm |
| PT9115789A PT91157B (en) | 1988-07-14 | 1989-07-13 | PROCESS FOR THE PRODUCTION OF AN ACO TAPE WITH A THICKNESS OF LESS THAN 10 MM |
| CN 89104780 CN1039371A (en) | 1988-07-14 | 1989-07-13 | Thickness is less than the production method of 10 millimeters steel band |
| CA 605581 CA1325326C (en) | 1988-07-14 | 1989-07-13 | Method of producing a steel strip having a thickness of less than 10 mm |
| SU4894202 RU2013184C1 (en) | 1988-07-14 | 1991-01-10 | METHOD OF CONTINUOUS CASTING OF METAL STRIP WITH THE THICKNESS OF LESS THAN 10 mm |
| FI910136A FI88591C (en) | 1988-07-14 | 1991-01-10 | Foerfarande Foer framstaellning av ett staolband med en tjocklek under 10 mm |
| DK004891A DK4891A (en) | 1988-07-14 | 1991-01-11 | PROCEDURE FOR PREPARING A STEEL BAND WITH A THICKNESS OF LESS THAN 10 MM |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3823861A DE3823861A1 (en) | 1988-07-14 | 1988-07-14 | METHOD AND SYSTEM FOR PRODUCING A STEEL TAPE THICKNESS THAN 10 MM |
| DE3823861 | 1988-07-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0353402A1 EP0353402A1 (en) | 1990-02-07 |
| EP0353402B1 true EP0353402B1 (en) | 1992-09-30 |
Family
ID=6358650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP89108232A Expired - Lifetime EP0353402B1 (en) | 1988-07-14 | 1989-05-08 | Method for producing steel strip with a thickness of less than 10 mm |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US4962808A (en) |
| EP (1) | EP0353402B1 (en) |
| KR (1) | KR900701438A (en) |
| DD (1) | DD287433A5 (en) |
| DE (2) | DE3823861A1 (en) |
| ES (1) | ES2035419T3 (en) |
| GR (1) | GR3006093T3 (en) |
| WO (1) | WO1990000456A1 (en) |
| ZA (1) | ZA895014B (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5018666A (en) * | 1989-12-01 | 1991-05-28 | Cf&I Steel Corporation | Unitary one quarter mile long railroad rail free of weld seams |
| US5503217A (en) * | 1990-07-23 | 1996-04-02 | Davy Mckee (Sheffield) Limited | Method of manufacturing metal strip |
| DE4123956C2 (en) * | 1991-07-19 | 1994-07-21 | Thyssen Stahl Ag | Process and plant for producing a metal strand by casting |
| ES2089317T3 (en) * | 1991-09-19 | 1996-10-01 | Schloemann Siemag Ag | PROCEDURE AND INSTALLATION FOR THE MANUFACTURE OF STEEL BELT. |
| IT1262116B (en) * | 1993-05-17 | 1996-06-19 | Danieli Off Mecc | CONTROLLED PRELAMINATION PROCEDURE FOR THIN SLABS OUT OF CONTINUOUS CASTING AND RELATED DEVICE |
| US5488987A (en) * | 1991-10-31 | 1996-02-06 | Danieli & C. Officine Meccaniche Spa | Method for the controlled pre-rolling of thin slabs leaving a continuous casting plant, and relative device |
| AT398396B (en) * | 1993-02-16 | 1994-11-25 | Voest Alpine Ind Anlagen | METHOD FOR PRODUCING A TAPE, PRE-STRIP OR A LAM |
| DE4403049C1 (en) * | 1994-01-28 | 1995-09-07 | Mannesmann Ag | Continuous caster and method for producing thin slabs |
| DE4403048C1 (en) * | 1994-01-28 | 1995-07-13 | Mannesmann Ag | Continuous caster and process for producing rectangular thin slabs |
| DE19529046A1 (en) * | 1995-07-31 | 1997-02-06 | Mannesmann Ag | Method and device for operating a continuous caster |
| AT410522B (en) * | 2001-05-07 | 2003-05-26 | Hulek Anton | METHOD AND CONTINUOUS CASTING SYSTEM FOR VERTICAL CONTINUOUS CASTING OF A STEEL STRIP |
| CH697624B1 (en) * | 2005-02-23 | 2008-12-31 | Main Man Inspiration Ag | Rolling device for an in-line rolling of a produced by strip casting, in particular twin-roll strip casting steel strip. |
| JP5371421B2 (en) * | 2005-04-07 | 2013-12-18 | アルベディ，ジョバンニ | Processes and systems for producing metal strips and sheets without disrupting continuity during continuous casting and rolling |
| CN101683709B (en) * | 2008-09-27 | 2012-11-14 | 宝山钢铁股份有限公司 | Method for continuously producing medium-caliber welded tube by strip continuous casting |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT266362B (en) * | 1966-04-22 | 1968-11-11 | Boehler & Co Ag Geb | Method and device for the production of stretch-formed products from refractory metals, in particular from unalloyed or alloyed steels with improved quality properties |
| GB1199805A (en) * | 1967-04-20 | 1970-07-22 | British Iron Steel Research | Continuous Casting |
| DE3400220A1 (en) * | 1984-01-05 | 1985-07-18 | SMS Schloemann-Siemag AG, 4000 Düsseldorf | CHOCOLATE FOR CONTINUOUSLY STEEL STRIP |
| JPS61189850A (en) * | 1985-02-20 | 1986-08-23 | Nippon Steel Corp | Continuous casting method of steel slab |
| JPH0669605B2 (en) * | 1986-02-15 | 1994-09-07 | 新日本製鐵株式会社 | A method for directly producing a thin metal plate from a slab |
| ATE75978T1 (en) * | 1987-04-13 | 1992-05-15 | Thyssen Stahl Ag | LINE FOR PRODUCTION OF A STEEL STRIP WITH A THICKNESS FROM 2 TO 25 MM. |
-
1988
- 1988-07-14 DE DE3823861A patent/DE3823861A1/en not_active Withdrawn
-
1989
- 1989-05-08 ES ES198989108232T patent/ES2035419T3/en not_active Expired - Lifetime
- 1989-05-08 DE DE8989108232T patent/DE58902362D1/en not_active Revoked
- 1989-05-08 EP EP89108232A patent/EP0353402B1/en not_active Expired - Lifetime
- 1989-06-29 KR KR1019900700513A patent/KR900701438A/en not_active Application Discontinuation
- 1989-06-29 WO PCT/EP1989/000742 patent/WO1990000456A1/en active IP Right Grant
- 1989-06-30 ZA ZA895014A patent/ZA895014B/en unknown
- 1989-07-06 US US07/376,341 patent/US4962808A/en not_active Expired - Fee Related
- 1989-07-12 DD DD89330734A patent/DD287433A5/en not_active IP Right Cessation
-
1992
- 1992-10-27 GR GR920402422T patent/GR3006093T3/el unknown
Also Published As
| Publication number | Publication date |
|---|---|
| ZA895014B (en) | 1990-04-25 |
| DD287433A5 (en) | 1991-02-28 |
| GR3006093T3 (en) | 1993-06-21 |
| DE3823861A1 (en) | 1990-01-18 |
| US4962808A (en) | 1990-10-16 |
| EP0353402A1 (en) | 1990-02-07 |
| WO1990000456A1 (en) | 1990-01-25 |
| ES2035419T3 (en) | 1993-04-16 |
| KR900701438A (en) | 1990-12-03 |
| DE58902362D1 (en) | 1992-11-05 |
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