EP0761325A1 - Method and installation for production of ferritic hot-rolled strip - Google Patents
Method and installation for production of ferritic hot-rolled strip Download PDFInfo
- Publication number
- EP0761325A1 EP0761325A1 EP96113056A EP96113056A EP0761325A1 EP 0761325 A1 EP0761325 A1 EP 0761325A1 EP 96113056 A EP96113056 A EP 96113056A EP 96113056 A EP96113056 A EP 96113056A EP 0761325 A1 EP0761325 A1 EP 0761325A1
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- European Patent Office
- Prior art keywords
- rolling
- stand
- production plant
- cooling
- strip
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 title claims description 17
- 238000009434 installation Methods 0.000 title abstract 2
- 238000005096 rolling process Methods 0.000 claims abstract description 55
- 238000001816 cooling Methods 0.000 claims abstract description 20
- 238000004804 winding Methods 0.000 claims description 10
- 238000003860 storage Methods 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 description 4
- 229910001566 austenite Inorganic materials 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—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
-
- 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
- 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
- B21B1/28—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 cold-rolling, e.g. Steckel cold mill
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
- B21B1/466—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a non-continuous process, i.e. the cast being cut before rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2201/00—Special rolling modes
- B21B2201/04—Ferritic rolling
Definitions
- the invention relates to a production system for the production of hot-rolled flat products, consisting of a multi-stand rolling mill, an outfeed roller table with devices for cooling the hot strip and with downstream winding machines for winding the strip.
- Rolling plants for the production of hot-rolled strips are generally designed and operated today in such a way that the forming in the individual stands is austenitic, which means that it is ensured that the rolling temperatures in the individual stands are above the GOS line of the iron-carbon diagram. Only after the last rolling pass, which should be as close as possible to the GOS line to achieve a fine-grained final structure, does cooling to the coiling temperature take place with structural change in the cooling section or in the wound bundle.
- the final rolling temperature for the rolling according to the process described above i.e. the temperature in the last mill stand of the rolling mill, is 840 to 920 ° C depending on the level of carbon content.
- the final rolling temperature is maintained by selecting the final rolling speed with which the natural cooling of the strip in the rolling mill and the heat input can be controlled by the drive power of the roll stands.
- This method is easily applicable for strip thicknesses above a minimum strip thickness, each is of the order of 1.3 mm depending on the road type. If this strip thickness is undershot, the required rolling speed with values above 12 m per second reaches a height that can no longer be controlled in the free run-out on the roller table behind the rolling mill.
- a preferred method provides for preliminary rolling in the austenitic range down to an intermediate thickness of 2 to 8 mm and finish rolling in the ferritic range for minimum final thicknesses below 1.3 mm.
- the rolling stock must be cooled from the finish rolling temperature in the austenitic range to the rolling temperature in the ferritic range. This means cooling from the temperature range of 840 to 920 ° C to the temperature range of 600 to 780 ° C.
- the final rolling temperature after the second deformation stage is also in the range from 600 to 780 ° C and thus in a range at which recrystallization of the structure in the wound bundle occurs after reeling.
- a structure is created which enables the product to be used without further cold forming or heat treatment.
- the object of the invention is to provide a production plant for the ferritic rolling of hot strip, with which the aforementioned disadvantages and problems are eliminated.
- the object of the invention is also to provide a method with which finish rolling of hot strip in the ferritic range is made possible without problems.
- the problem is solved in a production plant of the type mentioned at the outset with the invention in that the additional arrangement of a one to four-stand compact rolling mill 6 behind the coiler 5 of the conventionally designed hot strip mill 3 is proposed (see FIG. 1).
- This rolling mill is specially designed for forming in the ferritic area. This includes, among other things, equipping with work roll diameters of less than 500 mm as well as adjusting and control loops to achieve strip tolerances for thickness and flatness, as required by cold rolled products.
- the conventionally designed hot strip mill 3 takes over the production of an intermediate thickness by rolling in the austenitic area and the compact ferritic forming stage 6 takes over the final rolling in the ferritic area.
- the cooling of the strip with an intermediate thickness from the austenitic area into the ferritic area takes place in the simplest way when passing through the run-out roller table 4 between the austenitic forming step 3 and the ferritic forming step 6. Due to the length of this roller table, the strips which are rolled for cooling austenitic to the coiling temperature Throughput times result which, in the case of ferritic rolling, normally ensure the necessary cooling and the conversion of austenite into ferrite.
- the cooling devices 9 available for the austenitic rolling process can, if necessary, also be used to achieve the required cooling rate. If the throughput time from the last austenitic forming 3.1 to the first ferritic forming 6.1 is not sufficient for a sufficient conversion from austenite to ferrite, a heated loop storage device (not shown) is provided, which is located directly between the conventional coiler system 5 and the compact ferritic forming step 6 is to be arranged.
- reels 8 specially designed for winding thin strip 7 are arranged. Since the needs of thicker belts no longer have to be taken into account for the local conditions, the construction of such devices is possible without any problems.
- the hot strip production plant 1 for austenitic and ferritic rolling shown in the single figure is preceded by a roughing mill 12 (not shown in more detail) or a thin slab furnace with casting machine 13 before the first multi-stand rolling mill 3.
- the invention results in an overall system concept which optimally permits both the austenitic process and the ferritic rolling process.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Laminated Bodies (AREA)
- Winding Of Webs (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
Description
Die Erfindung betrifft eine Produktionsanlage zur Erzeugung von warmgewalzten Flachprodukten, bestehend aus einer mehrgerüstigen Walzstraße, einem Auslaufrollgang mit Einrichtungen zur Kühlung des Warmbandes und mit nachgeordneten Wickelmaschinen zum Aufwickeln des Bandes.The invention relates to a production system for the production of hot-rolled flat products, consisting of a multi-stand rolling mill, an outfeed roller table with devices for cooling the hot strip and with downstream winding machines for winding the strip.
Walzanlagen zur Erzeugung warmgewalzter Bänder werden heute im allgemeinen so ausgelegt und betrieben, daß die Umformung in den einzelnen Gerüsten austenitisch erfolgt, das heißt, es wird sichergestellt, daß die Walztemperaturen in den einzelnen Walzgerüsten oberhalb der GOS-Linie des Eisenkohlenstoffdiagramms liegen. Erst nach dem letzten Walzstich, der zur Erzielung eines feinkörnigen Endgefüges möglichst nahe an der GOS-Linie liegen sollte, erfolgt die Abkühlung auf die Haspeltemperatur mit Gefügeumwandlung in der Kühlstrecke bzw. im gewickelten Bund.Rolling plants for the production of hot-rolled strips are generally designed and operated today in such a way that the forming in the individual stands is austenitic, which means that it is ensured that the rolling temperatures in the individual stands are above the GOS line of the iron-carbon diagram. Only after the last rolling pass, which should be as close as possible to the GOS line to achieve a fine-grained final structure, does cooling to the coiling temperature take place with structural change in the cooling section or in the wound bundle.
Für Stähle mit einem Kohlenstoffgehalt von weniger als 0,2 % liegt für die Walzung nach dem oben beschriebenen Verfahren die Endwalztemperatur, das heißt die Temperatur im letzten Walzgerüst der Walzstraße je nach Höhe des Kohlenstoffgehalts bei 840 bis 920 °C. Die Einhaltung der Endwalztemperatur erfolgt durch Wahl der Endwalzgeschwindigkeit, mit der die natürliche Abkühlung des Bandes in der Walzstraße und die Wärmezufuhr durch die Antriebsleistung der Walzgerüste gesteuert werden kann. Dieses Verfahren ist problemlos anwendbar für Banddicken oberhalb einer Mindestbanddicke, die je nach Straßentyp in der Größenordnung von 1,3 mm liegt. Wird diese Banddicke unterschritten, so erreicht die erforderliche Walzgeschwindigkeit mit Werten oberhalb von 12 m pro Sekunde eine Höhe, die im freien Auslauf auf dem Rollgang hinter der Walzstraße nicht mehr beherrscht werden kann.For steels with a carbon content of less than 0.2%, the final rolling temperature for the rolling according to the process described above, i.e. the temperature in the last mill stand of the rolling mill, is 840 to 920 ° C depending on the level of carbon content. The final rolling temperature is maintained by selecting the final rolling speed with which the natural cooling of the strip in the rolling mill and the heat input can be controlled by the drive power of the roll stands. This method is easily applicable for strip thicknesses above a minimum strip thickness, each is of the order of 1.3 mm depending on the road type. If this strip thickness is undershot, the required rolling speed with values above 12 m per second reaches a height that can no longer be controlled in the free run-out on the roller table behind the rolling mill.
Die ungeachtet dieser Problematik vorhandene Entwicklungstendenz in Richtung geringerer Enddicken hat dazu geführt, daß nach Wegen gesucht wurde, die Endwalztemperatur abzusenken, um damit geringere Walzgeschwindigkeiten zu ermöglichen. Solche Walzprozesse wurden unter der Bezeichnung ferritisches Walzen bekannt, da sie bei Temperaturen unterhalb der GOS-Linie, das heißt im Bereich der α , γ -Mischkristalle oder unterhalb der GPS-Linie im ferritischen Bereich erfolgen.Despite this problem, the tendency towards development towards lower final thicknesses has led to the search for ways to lower the final rolling temperature in order to enable lower rolling speeds. Such rolling processes have become known as ferritic rolling because they take place at temperatures below the GOS line, that is to say in the region of the α, γ mixed crystals or below the GPS line in the ferritic region.
Ein bevorzugtes Verfahren sieht eine Vorwalzung im austenitischen Bereich bis auf eine Zwischendicke von 2 bis 8 mm und eine Fertigwalzung im ferritischen Bereich auf geringste Enddicken unterhalb von 1,3 mm vor. Zwischen den beiden Prozeßstufen muß das Walzgut von der Endwalztemperatur im austenitischen Bereich auf die Walztemperatur im ferritischen Bereich abgekühlt werden. Dies bedeutet eine Abkühlung aus dem Temperaturbereich von 840 bis 920 °C auf den Temperaturbereich von 600 bis 780 °C.A preferred method provides for preliminary rolling in the austenitic range down to an intermediate thickness of 2 to 8 mm and finish rolling in the ferritic range for minimum final thicknesses below 1.3 mm. Between the two process stages, the rolling stock must be cooled from the finish rolling temperature in the austenitic range to the rolling temperature in the ferritic range. This means cooling from the temperature range of 840 to 920 ° C to the temperature range of 600 to 780 ° C.
Die Endwalztemperatur hinter der zweiten Verformungsstufe liegt ebenfalls im Bereich von 600 bis 780 °C und damit in einer Größenordnung, bei der nach dem Aufhaspeln eine Rekristallisation des Gefüges im gewickelten Bund eintritt. Es entsteht ein Gefüge, welches die Verwendung des Produktes ohne weitere Kaltumformung oder Wärmebehandlung ermöglicht.The final rolling temperature after the second deformation stage is also in the range from 600 to 780 ° C and thus in a range at which recrystallization of the structure in the wound bundle occurs after reeling. A structure is created which enables the product to be used without further cold forming or heat treatment.
Wesentliche Voraussetzung für ein gutes Ergebnis ist die Einhaltung einer Mindestkühlzeit für die Abkühlung aus dem austenitischen Gebiet in das ferritische Gebiet. Damit die Umwandlung von Austenit in Ferrit in ausreichendem Maße erfolgen kann, muß diese Mindestkühlzeit eingehalten werden. Diese liegt je nach gewählter Temperatur für den Eintritt in die erste ferritische Umformung bei 10 bis 200 Sekunden.An essential prerequisite for a good result is compliance with a minimum cooling time for cooling from the austenitic area to the ferritic area. In order for the conversion of austenite to ferrite to take place to a sufficient extent, this minimum cooling time must be achieved be respected. Depending on the temperature selected for entry into the first ferritic deformation, this is 10 to 200 seconds.
Die Realisierung des oben beschriebenen Prozesses bereitet in einer konventionell gestalteten Warmbreitbandstraße erhebliche Schwierigkeiten. Der Übergang von der austenitischen in die ferritische Umformung soll im Dickenbereich von 2 bis 8 mm vorgenommen werden, das heißt in einem Dickenbereich, bei dem sich das Walzgut etwa in Mitte einer konventionellen Fertigstraße befindet. Da die Durchlaufzeit von Gerüst zu Gerüst an dieser Stelle nur wenige Sekunden beträgt, ist eine Realisierung der Kühlung zwar prinzipiell möglich, jedoch kann die Einhaltung der geforderten Zeit für die Umwandlung nicht realisiert werden. Die Durchführung des ferritischen Walzens nach der beschriebenen Methode wird damit für die konventionell gestaltete Warmbreitbandstraße unmöglich.The implementation of the process described above presents considerable difficulties in a conventionally designed hot strip mill. The transition from austenitic to ferritic forming should take place in the thickness range from 2 to 8 mm, i.e. in a thickness range in which the rolling stock is approximately in the middle of a conventional finishing train. Since the throughput time from scaffold to scaffold is only a few seconds at this point, cooling is possible in principle, but compliance with the required time for the conversion cannot be achieved. Carrying out ferritic rolling according to the described method is therefore impossible for the conventionally designed hot wide strip mill.
Bei diesem Stand der Technik besteht die Aufgabe der Erfindung darin, eine Produktionsanlage für das ferritische Walzen von Warmband zu schaffen, mit der die zuvor genannten Nachteile und Probleme beseitigt werden. Aufgabe der Erfindung ist auch ein Verfahren bereitzustellen, mit dem ein Fertigwalzen von Warmband im ferritischen Bereich problemlos ermöglicht wird.In this prior art, the object of the invention is to provide a production plant for the ferritic rolling of hot strip, with which the aforementioned disadvantages and problems are eliminated. The object of the invention is also to provide a method with which finish rolling of hot strip in the ferritic range is made possible without problems.
Die Lösung der Aufgabe gelingt bei einer Produktionsanlage der eingangs genannten Art mit der Erfindung dadurch, daß die zusätzliche Anordnung einer ein- bis viergerüstigen kompakten Walzstraße 6 hinter der Haspelanlage 5 der konventionell gestalteten Warmbreitbandstraße 3 vorgeschlagen wird (vgl. Figur). Diese Walzstraße ist speziell für die Umformung im ferritischen Gebiet gestaltet. Hierzu gehört unter anderem die Ausrüstung mit Arbeitswalzendurchmessern von weniger als 500 mm sowie mit Stell- und Regelkreisen zur Erzielung von Bandtoleranzen für Dicke und Planheit, wie sie von Kaltwalzprodukten gefordert werden.The problem is solved in a production plant of the type mentioned at the outset with the invention in that the additional arrangement of a one to four-stand compact rolling
Im Gesamtablauf des Walzprozesses übernimmt die konventionell gestaltete Warmbreitbandstraße 3 die Erzeugung einer Zwischendicke durch Walzung im austenitischen Bereich und die kompakte ferritische Umformstufe 6 die Endwalzung im ferritischen Bereich. Die Abkühlung des Bandes mit Zwischendicke aus dem austenitischen Bereich in den ferritischen Bereich erfolgt in einfachster Weise beim Durchlaufen des Auslaufrollganges 4 zwischen der austenitischen Umformstufe 3 und der ferritischen Umformstufe 6. Bedingt durch die Länge dieses Rollganges, der für die Kühlung austenitisch gewalzter Bänder auf Haspeltemperatur auszulegen ist, ergeben sich Durchlaufzeiten, die bei ferritischer Walzung im Normalfall die erforderliche Abkühlung und die Umwandlung von Austenit in Ferrit sicherstellen. Die für den austenitischen Walzprozess vorhandenen Kühleinrichtungen 9 können erforderlichenfalls zusätzlich zur Erzielung der erforderlichen Abkühlrate herangezogen werden. Sollte die Durchlaufzeit von der letzten austenitischen Umformung 3.1 bis zur ersten ferritischen Umformung 6.1 für eine ausreichende Umwandlung von Austenit in Ferrit nicht ausreichend sein, so wird ein beheizter Schlingenspeicher (nicht dargestellt) vorgesehen, der unmittelbar zwischen der konventionellen Haspelanlage 5 und der kompakten ferritischen Umformstufe 6 anzuordnen ist.In the overall course of the rolling process, the conventionally designed
Unmittelbar hinter der kompakten ferritischen Umformstufe 6 werden speziell für das Wickeln von Dünnband 7 gestaltete Haspel 8 angeordnet. Da für die örtlichen Gegebenheiten nicht mehr die Belange dickerer Bänder berücksichtigt werden müssen, ist die Konstruktion solcher Einrichtungen problemlos möglich.Immediately behind the compact ferritic forming
Der in der einzigen Figur dargestellten Warmbandproduktionsanlage 1 für austenitisches und ferritisches Walzen ist vor der ersten mehrgerüstigen Walzstraße 3 eine nicht näher dargestellte Vorstraße 12 oder ein Dünnbrammenofen mit Gießmaschine 13 vorgeordnet.The hot strip production plant 1 for austenitic and ferritic rolling shown in the single figure is preceded by a roughing mill 12 (not shown in more detail) or a thin slab furnace with
Mit der Erfindung ergibt sich ein Gesamtanlagenkonzept, welches in optimaler Weise sowohl den austenitischen Prozeß als auch den ferritischen Walzprozeß zuläßt.The invention results in an overall system concept which optimally permits both the austenitic process and the ferritic rolling process.
Claims (8)
dadurch gekennzeichnet,
daß in Walzrichtung (14) gesehen hinter den Wickelmaschinen (5) eine kompakte Umformstufe (6) in Form eines ein- oder mehrgerüstigen Walzwerkes für das Walzen dünner Bänder (7) angeordnet ist.Production plant (1) for the production of hot-rolled flat products (2, 7), consisting of a multi-stand rolling mill (3), an outfeed roller table (4) with devices (9) for cooling the hot strip and downstream winding machines (5) for winding the strip,
characterized,
that seen in the rolling direction (14) behind the winding machines (5) a compact forming stage (6) in the form of a single or multi-stand rolling mill for rolling thin strips (7) is arranged.
dadurch gekennzeichnet,
daß unmittelbar hinter der kompakten Umformstufe (6) spezielle Wickelmaschinen (8) für das Wickeln dünner Bänder (7) angeordnet sind.Production plant according to claim 1,
characterized,
that special winding machines (8) for winding thin strips (7) are arranged directly behind the compact forming stage (6).
dadurch gekennzeichnet,
daß die in Walzrichtung (14) gesehen erste mehrgerüstige Walzstraße (3) für die Walzung im austenitischen Temperaturbereich und die in Walzrichtung (14) gesehen zweite ein- oder mehrgerüstige Walzstraße (6) für die Walzung im ferritischen Temperaturbereich einsetzbar ist und daß die Abkühleinrichtung (9) für die Kühlung des Warmbandes (2) aus dem austenitischen in den ferritischen Temperaturbereich im Bereich des Kühlrollgangs (4) zwischen den beiden Walzstraßen (3, 6) angeordnet ist.Production plant according to claims 1 and 2,
characterized,
that the first multi-stand rolling mill (3) seen in the rolling direction (14) for rolling in the austenitic temperature range and the second single or multi-stand rolling mill (6) seen in the rolling direction (14) can be used for rolling in the ferritic temperature range and that the cooling device (9) for cooling the hot strip (2) from the austenitic to the ferritic temperature range in the area of the cooling roller table (4) between the two rolling mills (3, 6).
dadurch gekennzeichnet,
daß vor der zweiten ein- oder mehrgerüstigen Walzstraße (6) eine beheizte Speichereinrichtung vorgesehen ist.Production plant according to claim 3,
characterized,
that a heated storage device is provided in front of the second single or multi-stand rolling mill (6).
dadurch gekennzeichnet,
daß die Walzgerüste der kompakten Umformstufe (6) als Quarto- oder Sexto-Gerüste (6.1) ausgeführt sind.Production plant according to claim 2,
characterized,
that the rolling stands of the compact forming stage (6) are designed as four-high or six-high stands (6.1).
dadurch gekennzeichnet,
daß der Durchmesser der Arbeitswalzen (10) weniger als 800 mm, bevorzugt weniger als 400 mm beträgt.Production plant according to claims 2 and 5,
characterized,
that the diameter of the work rolls (10) is less than 800 mm, preferably less than 400 mm.
dadurch gekennzeichnet,
daß bei Einsatz von Arbeitswalzendurchmessern weniger als 400 mm die Arbeitswalzen (10) über die Stützwalzen (11) bzw. über die Zwischenwalzen antreibbar sind.Production plant according to claim 2, 5 and 6,
characterized,
that when using work roll diameters less than 400 mm, the work rolls (10) can be driven via the backup rolls (11) or via the intermediate rolls.
dadurch gekennzeichnet,
daß die zwei Walzgerüstgruppen (3, 6) miteinander kontinuierlich in der Weise arbeiten, daß sich Teile eines Warmbandes (2) gleichzeitig in beiden Gerüstgruppen (3, 6) befinden.Process for producing hot-rolled flat products with a production system consisting of a multi-stand rolling mill (3), an outfeed roller table (4), with devices (9) for cooling the hot strip and with downstream winding machines (5) for winding up the strip (2) according to at least one of the preceding claims 1 to 7,
characterized,
that the two roll stand groups (3, 6) work continuously with one another in such a way that parts of a hot strip (2) are simultaneously in both stand groups (3, 6).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19531538A DE19531538A1 (en) | 1995-08-25 | 1995-08-25 | Hot strip production plant for ferritic rolling and method for producing ferritic rolled strip |
| DE19531538 | 1995-08-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0761325A1 true EP0761325A1 (en) | 1997-03-12 |
| EP0761325B1 EP0761325B1 (en) | 2001-11-28 |
Family
ID=7770535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96113056A Expired - Lifetime EP0761325B1 (en) | 1995-08-25 | 1996-08-14 | Method and installation for production of ferritic hot-rolled strip |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US5771731A (en) |
| EP (1) | EP0761325B1 (en) |
| JP (1) | JP3883614B2 (en) |
| KR (1) | KR100424528B1 (en) |
| CN (1) | CN1081961C (en) |
| AT (1) | ATE209537T1 (en) |
| CA (1) | CA2183950C (en) |
| DE (2) | DE19531538A1 (en) |
| ES (1) | ES2169184T3 (en) |
| MY (1) | MY118124A (en) |
| RU (1) | RU2179083C2 (en) |
| TW (1) | TW311890B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0870553A2 (en) * | 1997-04-10 | 1998-10-14 | DANIELI & C. OFFICINE MECCANICHE S.p.A. | Rolling method for thin flat products and relative rolling line |
| DE19758108C1 (en) * | 1997-12-17 | 1999-01-14 | Mannesmann Ag | Method and installation for continuous production of hot rolled thin flat products |
| WO1999004915A1 (en) * | 1997-07-21 | 1999-02-04 | Kvaerner Metals Continuous Casting Limited | Continuous metal manufacturing method and apparatus therefor |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19903926A1 (en) * | 1999-02-01 | 2000-08-03 | Sms Demag Ag | Process and plant for forming metal strips |
| FR2792857B1 (en) * | 1999-04-28 | 2001-07-27 | Kvaerner Metals Clecim | PROCESS FOR THE CONTINUOUS MANUFACTURE OF A METAL STRIP |
| US20050115649A1 (en) * | 2003-03-27 | 2005-06-02 | Tokarz Christopher A. | Thermomechanical processing routes in compact strip production of high-strength low-alloy steel |
| EP2301684A1 (en) | 2009-09-24 | 2011-03-30 | Siemens Aktiengesellschaft | Welding method with optimised strain protection |
| AT509707B1 (en) * | 2010-05-04 | 2011-11-15 | Siemens Vai Metals Tech Gmbh | METHOD FOR HOT ROLLING OF STEEL STRIPS AND HOT ROLLING STRIP |
| CN106391710B (en) * | 2016-09-27 | 2018-07-31 | 武汉钢铁有限公司 | The production method and control device of thin slab continuous casting and rolling producing line be pilot |
| CN113996651A (en) * | 2021-10-29 | 2022-02-01 | 马鞍山钢铁股份有限公司 | Low-carbon steel and manufacturing method for improving performance uniformity of low-carbon steel rolled by ferrite in CSP process |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1903554A1 (en) * | 1968-01-24 | 1969-08-28 | Sumitomo Metal Ind | Process for the production of hot rolled steel strip |
| DE2613459A1 (en) * | 1976-03-30 | 1977-10-13 | Schloemann Siemag Ag | Arrangement for avoiding scrap in a rolling mill - for wide strip material, during break down of the prodn. line and/or the strip winding arrangement |
| EP0226446A2 (en) * | 1985-12-12 | 1987-06-24 | Kawasaki Steel Corporation | Method of producing thin steel sheets having an improved processability |
| JPS62230403A (en) * | 1985-12-12 | 1987-10-09 | Kawasaki Steel Corp | Thin steel sheet producing installation train |
| JPH0446608A (en) * | 1990-06-12 | 1992-02-17 | Kawasaki Steel Corp | Multistage hot rolling mill |
| EP0524162A2 (en) * | 1991-07-17 | 1993-01-20 | CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif | Method of manufacturing a thin sheet of low carbon steel |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5133205A (en) * | 1990-11-13 | 1992-07-28 | Mannesmann Aktiengesellschaft | System and process for forming thin flat hot rolled steel strip |
| JPH0655202A (en) * | 1992-08-07 | 1994-03-01 | Kawasaki Steel Corp | Method for rolling warm rolled strip |
| ATE163370T1 (en) * | 1993-05-17 | 1998-03-15 | Danieli Off Mecc | PRODUCTION LINE FOR THE PRODUCTION OF STRIPS AND/OR SHEET |
-
1995
- 1995-08-25 DE DE19531538A patent/DE19531538A1/en not_active Ceased
-
1996
- 1996-07-11 TW TW085108393A patent/TW311890B/zh active
- 1996-08-14 EP EP96113056A patent/EP0761325B1/en not_active Expired - Lifetime
- 1996-08-14 ES ES96113056T patent/ES2169184T3/en not_active Expired - Lifetime
- 1996-08-14 AT AT96113056T patent/ATE209537T1/en active
- 1996-08-14 DE DE59608302T patent/DE59608302D1/en not_active Expired - Lifetime
- 1996-08-19 JP JP21748696A patent/JP3883614B2/en not_active Expired - Fee Related
- 1996-08-22 US US08/704,005 patent/US5771731A/en not_active Expired - Lifetime
- 1996-08-22 CA CA002183950A patent/CA2183950C/en not_active Expired - Fee Related
- 1996-08-23 CN CN96112270A patent/CN1081961C/en not_active Expired - Fee Related
- 1996-08-23 MY MYPI96003478A patent/MY118124A/en unknown
- 1996-08-23 KR KR1019960034992A patent/KR100424528B1/en not_active IP Right Cessation
- 1996-08-23 RU RU96117004/02A patent/RU2179083C2/en not_active IP Right Cessation
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1903554A1 (en) * | 1968-01-24 | 1969-08-28 | Sumitomo Metal Ind | Process for the production of hot rolled steel strip |
| DE2613459A1 (en) * | 1976-03-30 | 1977-10-13 | Schloemann Siemag Ag | Arrangement for avoiding scrap in a rolling mill - for wide strip material, during break down of the prodn. line and/or the strip winding arrangement |
| EP0226446A2 (en) * | 1985-12-12 | 1987-06-24 | Kawasaki Steel Corporation | Method of producing thin steel sheets having an improved processability |
| JPS62230403A (en) * | 1985-12-12 | 1987-10-09 | Kawasaki Steel Corp | Thin steel sheet producing installation train |
| JPH0446608A (en) * | 1990-06-12 | 1992-02-17 | Kawasaki Steel Corp | Multistage hot rolling mill |
| EP0524162A2 (en) * | 1991-07-17 | 1993-01-20 | CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif | Method of manufacturing a thin sheet of low carbon steel |
Non-Patent Citations (2)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 016, no. 229 (M - 1255) 27 May 1992 (1992-05-27) * |
| PATENT ABSTRACTS OF JAPAN vol. 12, no. 91 (M - 679) 24 March 1988 (1988-03-24) * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0870553A2 (en) * | 1997-04-10 | 1998-10-14 | DANIELI & C. OFFICINE MECCANICHE S.p.A. | Rolling method for thin flat products and relative rolling line |
| EP0870553A3 (en) * | 1997-04-10 | 1999-02-10 | DANIELI & C. OFFICINE MECCANICHE S.p.A. | Rolling method for thin flat products and relative rolling line |
| US6062055A (en) * | 1997-04-10 | 2000-05-16 | Danieli & C. Officine Meccaniche Spa | Rolling method for thin flat products and relative rolling line |
| WO1999004915A1 (en) * | 1997-07-21 | 1999-02-04 | Kvaerner Metals Continuous Casting Limited | Continuous metal manufacturing method and apparatus therefor |
| DE19758108C1 (en) * | 1997-12-17 | 1999-01-14 | Mannesmann Ag | Method and installation for continuous production of hot rolled thin flat products |
| WO1999030847A1 (en) * | 1997-12-17 | 1999-06-24 | Sms Demag Ag | Method and installation for the continuous production of hot-rolled, thin flat products |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2183950A1 (en) | 1997-02-26 |
| JP3883614B2 (en) | 2007-02-21 |
| KR100424528B1 (en) | 2004-05-20 |
| TW311890B (en) | 1997-08-01 |
| RU2179083C2 (en) | 2002-02-10 |
| CA2183950C (en) | 2007-04-24 |
| CN1081961C (en) | 2002-04-03 |
| DE19531538A1 (en) | 1997-02-27 |
| CN1153685A (en) | 1997-07-09 |
| EP0761325B1 (en) | 2001-11-28 |
| JPH09122708A (en) | 1997-05-13 |
| DE59608302D1 (en) | 2002-01-10 |
| ES2169184T3 (en) | 2002-07-01 |
| MY118124A (en) | 2004-09-30 |
| US5771731A (en) | 1998-06-30 |
| KR19980015600A (en) | 1998-05-25 |
| ATE209537T1 (en) | 2001-12-15 |
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