EP0266564B2 - Strip casting installation with a following multiple stand continuous rolling mill - Google Patents
Strip casting installation with a following multiple stand continuous rolling mill Download PDFInfo
- Publication number
- EP0266564B2 EP0266564B2 EP87114449A EP87114449A EP0266564B2 EP 0266564 B2 EP0266564 B2 EP 0266564B2 EP 87114449 A EP87114449 A EP 87114449A EP 87114449 A EP87114449 A EP 87114449A EP 0266564 B2 EP0266564 B2 EP 0266564B2
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- European Patent Office
- Prior art keywords
- rolling
- strip
- roll
- starting material
- stands
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- 238000005096 rolling process Methods 0.000 title claims abstract description 70
- 238000005266 casting Methods 0.000 title claims description 8
- 238000009434 installation Methods 0.000 title 1
- 230000009467 reduction Effects 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 5
- 238000005098 hot rolling Methods 0.000 claims abstract description 5
- 239000010959 steel Substances 0.000 claims abstract description 5
- 239000007858 starting material Substances 0.000 claims abstract 7
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000009749 continuous casting Methods 0.000 abstract description 2
- 238000007711 solidification Methods 0.000 abstract description 2
- 230000008023 solidification Effects 0.000 abstract description 2
- 230000007423 decrease Effects 0.000 description 22
- 238000010586 diagram Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000005457 optimization Methods 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
- B21B1/466—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a non-continuous process, i.e. the cast being cut before rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
- B21B1/26—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/004—Heating the product
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4998—Combined manufacture including applying or shaping of fluent material
- Y10T29/49988—Metal casting
- Y10T29/49991—Combined with rolling
Definitions
- the invention relates to a method and Plant for the production of hot-rolled steel strip from a strip-shaped continuous cast Primary material in successive steps, the band-shaped primary material after solidification brought to hot rolling temperature and for rolling into finished strip in a multi-stand Rolling mill is introduced.
- the strip-shaped primary material cast as a strand generally has a thickness in the range between 25 to 60 mm. For example, if you go from a casting speed of about 0.13 m / s with an average strip thickness of 40 mm and assumes that the strip is rolled down to 2 mm is to be twenty times Change. In continuous operation, provided that the casting speed is the same the speed of entry into the first stand, would look at a tandem mill with seven scaffolds an exit speed after the last one Scaffolding at a height of 2.67 m / s. The minimum exit speed with a final rolling thickness of 2 mm is approximately 10 m / s, too big at lower speeds Temperature decrease rolling impossible makes. So far, to solve these problems followed two paths.
- the object of the present invention is therefore a process for producing hot rolled Steel belt and a belt caster with to present downstream hot strip mill, which avoids the disadvantages mentioned and the Difficulties can be overcome and which is economical even with smaller production quantities, i.e. worked at high capacity can be and especially low investment costs required are.
- the task is solved for the method according to the invention by the features of claim 1.
- the investment costs for the Contistrasse can even be considerable in this way be lowered while adjusting the technologically given rolling speed the casting speed.
- the invention it is provided that in the first two stands with approximately maximum rolling moment and large work roll diameter is worked.
- the work rolls driven.
- the increase in the gripping angle as a result The decrease is greater due to the enlargement of the work roll diameter and through compensates for the reduction in rolling speed, since it is known to have a grip decreasing rolling speed increases.
- the primary material cached before introduction to the rolling mill becomes.
- the strip caster and the hot strip mill be optimally adjusted.
- Such a Buffer can be used both as a storage heater with transverse displacement of the part lengths or as a continuous furnace and correspondingly longer be trained.
- Figure 1 with (1) is a strip or continuous caster referred to, the cross-dividing device (2), for example a flame cutting machine or scissors, to separate the cast and the strip caster (1) leaving the strip (3) in Sections of the same length is connected.
- the individual partial lengths of the tape (3) are then in a storage and heating device (4), for example, a roller hearth furnace, cached and to a homogeneous hot rolling temperature brought from about 1050 to 1100 degrees Celsius.
- a partial length leaving the oven (4) (5) is descaled in a known manner and if necessary also brought to a new opening length (not shown).
- the sub-band (5) in a rolling mill (6) consisting of three (or four) scaffolds (6 ', 6' ', 6' '') from the initial cross section Rolled to final roll thickness.
- a rolling mill (6) consisting of three (or four) scaffolds (6 ', 6' ', 6' '') from the initial cross section Rolled to final roll thickness.
- the finished belt (7) passes through degrees Celsius Cooling section (8), then from the underfloor reel (9) at a temperature of about 560 degrees Celsius to be wound up.
- the stitch decreases are shown in FIGS. 2a to 2d and rolling parameters in four stands schematically shown, each on the abscissa the decrease in thickness "ie" of the rolling stock in mm and on the ordinate the sum of the effective Rolling moment "Ma” is specified in kNm.
- FIG. 2a there is an initial thickness for the first framework of the strip material of 50 mm.
- the lines of the same work roll diameter (13-17) rise, for example, from below upwards in the range from 400 to 800 mm.
- the related Thickness or stitch reduction achieved a value of 52%.
- the set thickness reduction is, for example, 6 mm with a remaining thickness of 6 mm, corresponding to a related Height decrease of 50%.
- the selected working point (38) is far below the maximum transferable Rolling moment in the permissible range the rolling torque line for backup roller drive (31). so that the work rolls optionally themselves (32) or driven indirectly via the support rollers (31) can be.
- the reference numbers (43 - 47) also the same increasing work roll diameter depending on the rolling moment and decrease in thickness.
- the desired The decrease in thickness is, for example, 3 mm with a final thickness of 3 mm, corresponding to one related decrease in height of again 50%.
- the selected working point (48) is as in Fig. 2c far below the maximum transferable rolling torque in the permissible range of the rolling torque lines (41, 42) for work and backup roller drive, so that the work rolls here, as already in third scaffold, optionally own drive (42) or driven by the support rollers (41) will.
- the reference numbers (63-67) again increasing work roll diameter in Dependence on rolling torque and thickness reduction featured.
- the permissible working area between the lines (62) and (60) is followed by high stitch decreases right through the line of the maximum gripping angle (69) limited.
- the numbers (73-77) denote the Lines increasing work roll diameter from 400 to 800 mm.
- the set thickness reduction is, for example, 4 mm to achieve this a remaining thickness of 4 mm, corresponding to one related decrease in height of 50%.
- the chosen one Working point (78) is 900 mm at 4 mm Thickness decrease far below the maximum transferable Rolling moment in the permissible range the rolling torque line for backup roller drive (not shown) and work roll drive (72).
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Laminated Bodies (AREA)
- Heat Treatment Of Steel (AREA)
- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren und eine Anlage zur Herstellung von warmgewalztem Stahlband aus einem bandförmig stranggegossenen Vormaterial in aufeinanderfolgenden Arbeitsschritten, wobei das bandförmige Vormaterial nach Erstarrung auf Warmwalztemperatur gebracht und zum Auswalzen zu Fertigband in ein mehrgerüstiges Walzwerk eingeführt wird.The invention relates to a method and Plant for the production of hot-rolled steel strip from a strip-shaped continuous cast Primary material in successive steps, the band-shaped primary material after solidification brought to hot rolling temperature and for rolling into finished strip in a multi-stand Rolling mill is introduced.
Zwar ist schon früher versucht worden, aus Stranggießanlagen austretendes Vormaterial kontinuierlich weiterzuwalzen. Die dabei jedoch auftretenden Schwierigkeiten ergeben sich vor allem deshalb, weil die maximale Gießgeschwindigkeit, mit der der Gießstrang die Stranggießanlage verläßt, viel geringer ist als die niedrigst mögliche Walzgeschwindigkeit einer herkömmlichen, beispielsweise sieben Walzgerüste umfassenden Walzstraße.It has been tried earlier Continuous casting material emerging continuously to continue rolling. The ones that occur, however Above all, difficulties arise because the maximum casting speed, with which the casting strand leaves the continuous caster, is much less than the lowest possible Rolling speed of a conventional one, for example comprising seven roll stands Rolling mill.
Das als Strang gegossene bandförmige Vormaterial hat im allgemeinen eine Dicke im Bereich zwischen 25 bis 60 mm. Geht man beispielsweise von einer Gießgeschwindigkeit von etwa 0,13 m/s bei einer mittleren Banddicke von 40 mm aus und unterstellt, daß das Band bis auf 2 mm heruntergewalzt werden soll, dann bedeutet das eine zwanzigfache Veränderung. Im Konti-Betrieb unter der Voraussetzung, daß die Gießgeschwindigkeit gleich der Einlaufgeschwindigkeit in das erste Gerüst ist, würde sich bei einer Tandemstraße mit sieben Gerüsten eine Austrittsgeschwindigkeit nach dem letzten Gerüst in Höhe von 2,67 m/s ergeben. Die minimale Austrittsgeschwindigkeit bei einer Endwalzdicke von 2 mm beträgt aber ungefähr 10 m/s, da bei niedrigeren Geschwindigkeiten eine zu große Temperaturabnahme das Walzen unmöglich macht. Zur Lösung dieser Probleme wurden bisher zwei Wege beschritten. Der eine Weg sah vor, daß eine mehrgerüstige Konti-Straße durch eine Hochverformungsmaschine (beispielsweise ein Planetenwalzwerk) ersetzt wird, die mit einer geringen Eintrittsgeschwindigkeit in das Walzgerüst arbeitet und mit der eine hohe Stichabnahme erzielt werden kann (vgl. Berg- und Hüttenmännische Monatshefte, 107. Jg., Seite 149). Mit einer derartigen sehr teuren Sonderkonstruktion konnten aber bisher keine befriedigenden Ergebnisse erzielt werden, da insbesondere keine homogene Walzqualität erzeugt werden kann.The strip-shaped primary material cast as a strand generally has a thickness in the range between 25 to 60 mm. For example, if you go from a casting speed of about 0.13 m / s with an average strip thickness of 40 mm and assumes that the strip is rolled down to 2 mm is to be twenty times Change. In continuous operation, provided that the casting speed is the same the speed of entry into the first stand, would look at a tandem mill with seven scaffolds an exit speed after the last one Scaffolding at a height of 2.67 m / s. The minimum exit speed with a final rolling thickness of 2 mm is approximately 10 m / s, too big at lower speeds Temperature decrease rolling impossible makes. So far, to solve these problems followed two paths. One way provided that a multi-stand continuous line through a high-deformation machine (for example a planetary mill) is replaced with a low entry speed works in the rolling stand and with which a high stitch decrease can be achieved can (see Mining and Metallurgical Monthly Bulletins, 107th year, page 149). With such a very So far, however, no expensive special construction has been possible satisfactory results are achieved because especially no homogeneous rolling quality can be.
Ein aus der deutschen Offenlegungsschrift DE-A-32
41 745 bekanntes Verfahren nach dem Oberbegriff
des Anspruchs 1 bzw. eine Anlage gemäß
dem Oberbegriff des Anspruchs 5 sieht zur Problemlösung
vor, daß der bandförmige Gießstrang
zu einem Bund aufgewickelt und nach Erwärmung
wieder abgewickelt einem Walzwerk zum Auswalzen
zu Endquerschnitten zugeführt wird. Das Walzwerk
ist dabei als Steckelwalzwerk oder Fertiggerüstgruppe
eines Warmbandwalzwerkes ausgebildet.
Nachteil dieser bekannten Anlage ist in erster
Linie der hohe Investitionsaufwand für eine mehrgerüstige
Tandem-Straße, deren Kosten sich auf
weit über 100 Millionen DM belaufen. Derartig hohe
Kosten sind nur zu vertreten, wenn die Konti-Straße
voll ausgelastet wird; deshalb wird in der genannten
Druckschrift auch vorgeschlagen, der Konti-Straße
eine mehradrige Stranggießanlage vorzuordnen.
Dadurch erhöht sich aber der Gesamtaufwand
und auch das Ausbringvermögen der Gesamtanlage,
was in vielen Anwendungsfällen gar nicht benötigt
wird.One from the German published application DE-A-32
41 745 known method according to the preamble
of
Aufgabe der vorliegenden Erfindung ist es daher, ein Verfahren zur Herstellung von warmgewalztem Stahlband und eine Bandgießanlage mit nachgeordnetem Warmbandwalzwerk vorzustellen, womit die genannten Nachteile vermieden und die Schwierigkeiten ausgeräumt werden können und womit auch bei kleineren Produktionsmengen wirtschaftlich, d.h. mit hoher Auslastung gearbeitet werden kann und insbesondere nur geringe Investitionskosten erforderlich sind.The object of the present invention is therefore a process for producing hot rolled Steel belt and a belt caster with to present downstream hot strip mill, which avoids the disadvantages mentioned and the Difficulties can be overcome and which is economical even with smaller production quantities, i.e. worked at high capacity can be and especially low investment costs required are.
Die Lösung der gestellten Aufgabe gelingt für
das Verfahren erfindungsgemäß durch die Merkmale
des Anspruchs 1. Die Investitionskosten für die
Kontistraße können auf diese Weise sogar erheblich
gesenkt werden, bei gleichzeitiger Anpassung
der technologisch gegebenen Walzgeschwindigkeit
an die Gießgeschwindigkeit.The task is solved for
the method according to the invention by the features
of
Die Fachwelt war bisher der Meinung, daß dieser Weg nicht gangbar sei, da befürchtet wurde, daß mit einer Verringerung der Gerüstzahl und der Erhöhung der Abnahme pro Stich die technologischen Randbedingungen nicht mehr erfüllt sein würden. Diese sind im wesentlichen das maximal übertragbare Drehmoment, die maximal übertragbare Walzkraft (Linienbelastung zwischen Stützwalze und Arbeitswalze sowie Gerüstauslegung) und der Greifwinkel im Walzspalt. Infolge der höheren Stichabnahme und der geringeren Wärmeverluste bei verringerter Gerüstzahl kann aber nun gemäß der Erfindung die Walzgeschwindigkeit stark gesenkt werden (von ca. 10-11 auf 4-6 m/s), wodurch sich eine Reduzierung der Gesamtantriebsleistung und eine Verminderung des Anlagenverschleißes ergibt, d.h. eine Senkung der Kosten auf der elektrischen und mechanischen Seite.The professional world was previously of the opinion that this Path was not feasible because there was a fear that with a reduction in the number of scaffolds and the Technological increase in decrease per stitch Boundary conditions can no longer be met would. These are essentially the maximum transferable torque, the maximum transferable Rolling force (line load between backup roll and work roll and scaffolding design) and the gripping angle in the roll gap. As a result of the higher Stitch decrease and lower heat loss with a reduced number of stands, however, can now according to of the invention, the rolling speed is greatly reduced (from approx. 10-11 to 4-6 m / s), which means there is a reduction in the total drive power and a reduction in system wear results, i.e. a reduction in costs on the electrical and mechanical side.
Nach der Erfindung ist vorgesehen, daß in den ersten zwei Gerüsten mit in etwa maximalem Walzmoment und großem Arbeitswalzendurchmesser gearbeitet wird. Dabei werden die Arbeitswalzen angetrieben. Die Zunahme des Greifwinkels infolge größerer Abnahme wird dabei durch die Vergrößerung des Arbeitswalzendurchmessers und durch die Absenkung der Walzgeschwindigkeit kompensiert, da bekanntermaßen das Greifvermögen mit sinkender Walzgeschwindigkeit ansteigt.According to the invention it is provided that in the first two stands with approximately maximum rolling moment and large work roll diameter is worked. The work rolls driven. The increase in the gripping angle as a result The decrease is greater due to the enlargement of the work roll diameter and through compensates for the reduction in rolling speed, since it is known to have a grip decreasing rolling speed increases.
In weiterer Ausgestaltung der Erfindung erfolgt bei dem dritten und/oder vierten Gerüst der Antrieb über die Stützwalzen. Insbesondere bei sehr kleinen Endquerschnitten unter 2 mm ist eine derartige Betriebsweise sinnvoll.In a further embodiment of the invention in the third and / or fourth stand the drive over the backup rolls. Especially with very small ones End cross sections less than 2 mm is one Operating mode makes sense.
Mit Vorteil ist vorgesehen, daß das Vormaterial vor Einführung in die Walzstraße zwischengespeichert wird. Auf diese Weise können die technologisch gegebenen unterschiedlichen Geschwindigkeiten der Bandgießanlage und des Warmbandwalzwerkes optimal angepaßt werden. Ein solcher Zwischenspeicher kann dabei sowohl als Speicherofen mit Querverschiebung der Bandteillängen oder auch als Durchlaufofen und entsprechend länger ausgebildet sein.It is advantageously provided that the primary material cached before introduction to the rolling mill becomes. In this way, the technologically given different speeds the strip caster and the hot strip mill be optimally adjusted. Such a Buffer can be used both as a storage heater with transverse displacement of the part lengths or as a continuous furnace and correspondingly longer be trained.
Besonders zweckmäßig und vorteilhaft wird das Verfahren zum Walzen schmaler Fertigbänder zwischen 1000 bis 2000 mm, vorzugsweise 1350 mm Breite und mit großem Erfolg zum Walzen von Fertigbändern niedriger Festigkeit verwendet.Is particularly useful and advantageous the process for rolling narrow finished strips between 1000 to 2000 mm, preferably 1350 mm wide and with great success for rolling Finished tapes of low strength are used.
Für eine Bandgießanlage mit nachgeordnetem
mehrgerüstigen Kontiwalzwerk wird die Aufgabe
durch die Merkmale nach Anspruch 5 gelöst. Dabei
sind vorteilhaft alle Arbeitswalzen des Walzwerks
mit eigenem Antrieb versehen. Ferner können die
Arbeitswalzen der ersten zwei Gerüste mit Antrieb
und das dritte und /oder vierte Gerüst mit Stützwalzenantrieb
versehen sein, insbesondere wenn kleinste
Enddicken gewalzt werden sollen.For a strip caster with subordinate
Multi-stand continuous rolling mill will do the job
solved by the features of
Weitere Vorteile der Erfindung ergeben sich aus der nachstehenden Erläuterung mehrerer in den Zeichnungen schematisch dargestellter Ausführungsbeispiele.Further advantages of the invention result from the explanation below of several in the drawings of schematically illustrated embodiments.
Es zeigen:
- Fig. 1
- eine Prinzipskizze eines Ansführungsbeispiels der erfindungsgemäßen Anlage in Seitenansicht,
- Fig. 2a-d
- Prinzipdiagramme für den Walzbetrieb in vier Gerüsten nach dem Ausführungsbeispiel des erfindungs gemäßen Verfahren,
- Fig. 3
- Walzdiagramm für die Stichabnahme im ersten Gerüst,
- Fig. 4
- Walzdiagramm für die Stichabnahme im zweiten Gerüst,
- Fig. 5
- Walzdiagramm für die Stichabnahme im dritten und letzten Gerüst.
- Fig. 1
- 2 shows a schematic diagram of an exemplary embodiment of the system according to the invention in side view,
- 2a-d
- Principle diagrams for the rolling operation in four stands according to the embodiment of the method according to the invention,
- Fig. 3
- Roll diagram for the stitch acceptance in the first stand,
- Fig. 4
- Rolling diagram for the stitch acceptance in the second stand,
- Fig. 5
- Rolling diagram for the stitch acceptance in the third and last stand.
In Figur 1 ist mit (1) eine Band- bzw. Stranggießanlage bezeichnet, der eine Querteileinrichtung (2), beispielsweise eine Brennschneidmaschine oder Schere, zum Trennen des gegossenen und die Bandgießanlage (1) verlassenden Bandes (3) in Teilstücke gleicher Länge nachgeschaltet ist. Die einzelnen Teilängen des Bandes (3) werden sodann in einer Speicher- und Wärmeinrichtung (4), beispielsweise einem Rollenherdofen, zwischengespeichert und auf eine homogene Warmwalztemperatur von etwa 1050 bis 1100 Grad Celsius gebracht. Eine den Ofen (4) verlassende Teillänge (5) wird in bekannter Weise entzundert und gegebenenfalls auch auf eine neue Vorbandlänge gebracht (nicht dargestellt). Danach wird das Teilband (5) in einer Walzstraße (6), bestehend aus drei (oder vier) Gerüsten (6', 6'', 6''') vom Ausgangsquerschnitt auf Endwalzdicke fertiggewalzt. Nach Verlassen des letzten Walzgerüstes (6''') der Walzstraße (6) mit einer Auslauttemperatur von etwa 860 Grad Celsius durchläuft das Fertigband (7) die Kühlstrecke (8), um anschließend vom Unterflurhaspel (9) bei einer Temperatur von etwa 560 Grad Celsius aufgewickelt zu werden.In Figure 1 with (1) is a strip or continuous caster referred to, the cross-dividing device (2), for example a flame cutting machine or scissors, to separate the cast and the strip caster (1) leaving the strip (3) in Sections of the same length is connected. The individual partial lengths of the tape (3) are then in a storage and heating device (4), for example, a roller hearth furnace, cached and to a homogeneous hot rolling temperature brought from about 1050 to 1100 degrees Celsius. A partial length leaving the oven (4) (5) is descaled in a known manner and if necessary also brought to a new opening length (not shown). Then the sub-band (5) in a rolling mill (6) consisting of three (or four) scaffolds (6 ', 6' ', 6' '') from the initial cross section Rolled to final roll thickness. After leaving of the last rolling stand (6 '' ') on the rolling mill (6) with a discharge temperature of about 860 The finished belt (7) passes through degrees Celsius Cooling section (8), then from the underfloor reel (9) at a temperature of about 560 degrees Celsius to be wound up.
In den Figuren 2a bis 2d sind die Stichabnahmen und Walzparameter in vier Gerüsten schematisch dargestellt, wobei auf den Abszissen jeweils die Dickenabnahme "dh" des Walzgutes in mm und auf den Ordinaten die Summe des wirksamen Walzmomentes "Ma" in kNm angegeben ist.The stitch decreases are shown in FIGS. 2a to 2d and rolling parameters in four stands schematically shown, each on the abscissa the decrease in thickness "ie" of the rolling stock in mm and on the ordinate the sum of the effective Rolling moment "Ma" is specified in kNm.
In Figur 2a ist für das erste Gerüst eine Eingangsdicke
des Bandmaterials von 50 mm angenommen.
Das maximal übertragbare Walzmoment
(10) bei einem bestimmten Arbeitswalzendurchmesser
(13 - 17) schneidet als Horizontale die
Kurven (11, 12), wobei die Kurve (11) die Walzmomentgrenze
bei Stützwalzenantrieb mit einem
Reibwert von µ = 0,15 und die Kurve (12) die
Walzmomentgrenze bei Arbeitswalzenantrieb angibt.
Die Linien gleichen Arbeitswalzendurchmessers
(13 - 17) steigen beispielsweise von unten
nach oben im Bereich von 400 bis 800 mm. Unter
Ausnutzung eines nahezu maximalen Walzmomentes
bei einem bestimmten und verhältnismäßig großen
Arbeitswalzendurchmesser (zwischen den Linien
15 und 16) mit Arbeitswalzenantrieb (12) kann
der Arbeitspunkt (18) für das erste Gerüst so gewählt
werden, daß die Dickenabnahme beispielsweise
26 mm beträgt, so daß eine Restdicke nach
dem ersten Gerüst von 50 - 26 = 24 mm verbleibt,
die in das zweite Gerüst eingeführt wird. Die bezogene
Dicken- bzw. Stichabnahme erreicht dabei
einen Wert von 52 %.In FIG. 2a there is an initial thickness for the first framework
of the strip material of 50 mm.
The maximum transferable rolling moment
(10) for a certain work roll diameter
(13 - 17) intersects the horizontal
Curves (11, 12), the curve (11) the rolling torque limit
with backup roller drive with one
Coefficient of friction of µ = 0.15 and curve (12)
Rolling torque limit for work roll drive indicates.
The lines of the same work roll diameter
(13-17) rise, for example, from below
upwards in the range from 400 to 800 mm. Under
Utilization of an almost maximum rolling moment
for a certain and relatively large
Work roll diameter (between the
In Figur 2b sind mit den Bezugsziffern (23 - 27) wiederum steigende Arbeitswalzendurchmesser in Abhängigkeit von Walzmoment und Dickenabnahme gekennzeichnet. Unter Ausnutzung des maximal übertragbaren Walzmomentes (20) ergibt sich im zweiten Gerüst bei vorzugsweise dem gleichen Arbeitswalzendurchmesser (zwischen 25 und 26) der Arbeitspunkt (28) im Zulässigkeitsbereich oberhalb der Linie für das maximal übertragbare Walzmoment bei Arbeitswalzenantrieb (22) aber außerhalb der Zulässigkeit für Stützwalzenantrieb (21) mit einer Dickenabnahme von beispielsweise 12 mm, so daß von 24 - 12 eine Restdicke = 12 mm verbleibt, entsprechend einer bezogenen Stichabnahme von 50 %. Das zulässige Arbeitsfeld zwischen den Linien (22) und (20) wird bei höchsten Stichabnahmen nach rechts durch die Linie des maximalen Greifwinkels (29) begrenzt.In FIG. 2b, the reference numbers (23 - 27) again increasing work roll diameters depending on the rolling moment and thickness reduction featured. Taking advantage of the maximum transferable rolling moment (20) results in the second framework, preferably the same Work roll diameter (between 25 and 26) the working point (28) within the permissible range above the line for the maximum transferable Rolling torque with work roll drive (22), however outside the allowance for backup roller drive (21) with a decrease in thickness of, for example 12 mm, so that from 24 - 12 a residual thickness = 12 mm remains, according to a related 50% stitch reduction. The permissible field of work between lines (22) and (20) is at highest Stitch decreases to the right through the line of the maximum gripping angle (29) limited.
In Figur 2c sind mit den Bezugsziffern (33 - 37) wiederum steigende Arbeitswalzendurchmesser in Abhängigkeit von Walzmoment und Dickenabnahme bezeichnet. Die eingestellte Dickenabnahme liegt hier beispielsweise bei 6 mm mit einer Restdicke von 6 mm, entsprechend einer bezogenen Höhenabnahme von 50 %. Der gewählte Arbeitspunkt (38) liegt weit unterhalb des maximal übertragbaren Walzmomentes im Zulässigkeitsbereich der Walzmomentlinie für Stützwalzenantrieb (31). so daß die Arbeitswalzen wahlweise selbst (32) oder indirekt über die Stützwalzen (31) angetrieben werden können.In FIG. 2c, the reference numbers (33 - 37) again increasing work roll diameters depending on the rolling moment and thickness reduction designated. The set thickness reduction is, for example, 6 mm with a remaining thickness of 6 mm, corresponding to a related Height decrease of 50%. The selected working point (38) is far below the maximum transferable Rolling moment in the permissible range the rolling torque line for backup roller drive (31). so that the work rolls optionally themselves (32) or driven indirectly via the support rollers (31) can be.
In Figur 2d sind mit den Bezugsziffern (43 - 47) ebenfalls die gleichen steigenden Arbeitswalzendurchmesser in Abhängigkeit von Walzmoment und Dickenabnahme dargestellt. Die gewünschte Dickenabnahme liegt hier beispielsweise bei 3 mm mit einer Enddicke von 3 mm, entsprechend einer bezogenen Höhenabnahme von wiederum 50 %. Der gewählte Arbeitspunkt (48) liegt wie in Fig. 2c weit unterhalb des maximal übertragbaren Walzmomentes im Zulässigkeitsbereich der Walzmomentlinien (41, 42) für Arbeits- und Stützwalzenantrieb, so daß die Arbeitswalzen hier, wie auch schon im dritten Gerüst, wahlweise einn eigenen Antrieb besitzen (42) oder über die Stützwalzen (41) angetrieben werden.In FIG. 2d, the reference numbers (43 - 47) also the same increasing work roll diameter depending on the rolling moment and decrease in thickness. The desired The decrease in thickness is, for example, 3 mm with a final thickness of 3 mm, corresponding to one related decrease in height of again 50%. The selected working point (48) is as in Fig. 2c far below the maximum transferable rolling torque in the permissible range of the rolling torque lines (41, 42) for work and backup roller drive, so that the work rolls here, as already in third scaffold, optionally own drive (42) or driven by the support rollers (41) will.
In Figur 3 sind Betriebswerte fur die Stichabnahme
in einem ersten von drei Gerüsten als Arbeitsdiagramm
dargestellt, wobei auf der Abszisse
wiederum die Dickenabnahme "dh" des Walzgutes
in mm und auf der Ordinate die Summe des wirksamen
Walzmomentes "Ma" in kNm angegeben
ist. Mit den Bezugsziffern (53 - 57) sind von 400
auf 800 mm steigende Arbeitswalzendurchmesser
gekennzeichnet. Unter Ausnutzung des maximal
übertragbaren Walzmomentes in Höhe von 1700
kNm (50) ergibt sich hier bei einem Arbeitswalzendurchmesser
von 710 mm (zwischen 56 und 57)
der Arbeitspunkt (58) im Zulässigkeitsbereich oberhalb
der Linie für das maximal übertragbäre Walzmoment
bei Arbeitswalzenantrieb (52), außerhalb
der Zulässigkeit für Stützwalzenantrieb (51), mit
einer Dickenabnahme von 19 mm, so daß von einer
Eingangsdicke von 41 mm - 19 eine Restdicke =
22 mm verbleibt, entsprechend einer bezogenen
Stichabnahme von 46,34 %. Das zulässige Arbeitsfeld
zwischen den Linien (52) und (50) wird durch
die Linie des maximalen Greifwinkels (59) nicht
begrenzt.In Figure 3 are operating values for the stitch acceptance
in a first of three stands as a working diagram
shown, being on the abscissa
again the decrease in thickness "ie" of the rolling stock
in mm and on the ordinate the sum of the effective
Rolling moment "Ma" specified in kNm
is. With the reference numbers (53 - 57) are from 400
work roll diameter increasing to 800 mm
featured. Taking advantage of the maximum
transferable rolling torque of 1700
kNm (50) results here with a work roll diameter
of 710 mm (between 56 and 57)
the working point (58) in the permissible range above
the line for the maximum transferable rolling moment
with work roll drive (52), outside
the permissibility for backup roller drive (51), with
a decrease in thickness of 19 mm, so that from one
Input thickness of 41 mm - 19 a remaining
In Figur 4 sind mit den Bezugsziffern (63 - 67) wiederum steigende Arbeitswalzendurchmesser in Abhängigkeit von Walzmoment und Dickenabnahme gekennzeichnet. Unter Ausnutzung eines maximal übertragbaren Walzmomentes von 1700 kNm (60) ergibt sich im zweiten Gerüst bei vorzugsweise dem gleichen Arbeitswalzendurchmesser wie im ersten Gerüst von 710 mm (zwischen 66 und 67) der Arbeitspunkt (68) im Zulässigkeitsbereich oberhalb der Linie für das maximal übertragbare Walzmoment bei Arbeitswalzenantrieb (62) aber außerhalb der Zulässigkeit für Stützwalzenantrieb (61) mit einer Dickenabnahme von 14 mm, so daß von 22 - 14 eine Restdicke = 8 mm verbleibt, entsprechend einer bezogenen Stichabnahme von 63,64 %. Das zulässige Arbeitsfeld zwischen den Linien (62) und (60) wird bei hohen Stichabnahmen nach rechts durch die Linie des maximalen Greifwinkels (69) begrenzt.In FIG. 4, the reference numbers (63-67) again increasing work roll diameter in Dependence on rolling torque and thickness reduction featured. Taking advantage of a maximum transferable rolling moment of 1700 kNm (60) results in the second framework at preferably the same work roll diameter as in first scaffolding of 710 mm (between 66 and 67) the working point (68) in the permissible range above the line for the maximum transferable rolling moment with work roll drive (62) but outside the permissibility for backup roller drive (61) with a decrease in thickness of 14 mm, so that from 22 - 14 a remaining thickness = 8 mm remains, accordingly a related stitch decrease of 63.64 %. The permissible working area between the lines (62) and (60) is followed by high stitch decreases right through the line of the maximum gripping angle (69) limited.
In Figur 5 bezeichnen die Ziffern (73 - 77) die Linien steigender Arbeitswalzendurchmesser von 400 auf 800 mm. Die eingestellte Dickenabnahme liegt hier beispielsweise bei 4 mm zur Erzielung einer Restdicke von 4 mm, entsprechend einer bezogenen Höhenabnahme von 50 %. Der gewählte Arbeitspunkt (78) liegt mit 900 kNm bei 4 mm Dickenabnahme weit unterhalb des maximal übertragbaren Walzmomentes im Zulässigkeitsbereich der Walzmomentlinie für Stützwalzenantrieb (nicht dargestellt) und Arbeitswalzenantrieb (72).In Figure 5, the numbers (73-77) denote the Lines increasing work roll diameter from 400 to 800 mm. The set thickness reduction is, for example, 4 mm to achieve this a remaining thickness of 4 mm, corresponding to one related decrease in height of 50%. The chosen one Working point (78) is 900 mm at 4 mm Thickness decrease far below the maximum transferable Rolling moment in the permissible range the rolling torque line for backup roller drive (not shown) and work roll drive (72).
Die erfindungsgemäßen Maßnahmen sind nicht auf das in den Zeichnungsfiguren dargestellte Ausführungsbeispiel beschränkt. So können beispielsweise, ohne den Rahmen der Erfindung zu verlassen, in den einzelnen Gerüsten Arbeitswalzen mit unterschiedlicher Walzengeometrie zur Optimierung der einzelnen Verformungszustände angeordnet sein, beispielsweise insbesondere in den letzten Gerüsten auch sogenannte gegeneinander verschiebbare Flaschenwalzen zur kontinuierlichen Veränderung des Walzspaltes an den Walzenverschleiß. Die jeweilige konstruktive Ausgestaltung ist in Anpassung an die spätere Verwendung der Vorrichtung dem Fachmann anheimgestellt.The measures according to the invention are not to the embodiment shown in the drawing figures limited. For example, without leaving the scope of the invention, with work rolls in the individual stands different roller geometry for optimization of the individual deformation states be, for example, especially in the last Scaffolds also so-called mutually displaceable Bottle rollers for continuous Change of the roll gap on the roll wear. The respective design is in adaptation to the later use of the device left to the specialist.
Claims (5)
- Method of manufacturing hot-rolled steel strip from a strip-shaped continuously cast starting material in successive working steps, wherein the strip-shaped starting material is brought to hot-rolling temperature after hardening and is introduced into a multi-stand continuous roll train (6) for rolling out to finished strip, wherein narrow finished strips of between 1000 and 2000 millimetres in width are rolled, characterised thereby that the rolling out into finished strip takes place in three or four horizontal roll stands (6, 6'', 6'''), wherein in the first two stands (6', 6'') for the attainment of highest possible roll pass reductions with use of an approximately maximum rolling moment the operation is with a relatively large working roll diameter of between 400 and 800 millimetres at the rolling moment limit with working roll drive and with a rolling speed strongly reduced to 4 to 6 metres per second.
- Method according to claim 1, characterised thereby that the drive by way of the working rolls takes place for all stands.
- Method according to claim, characterised thereby that finished strips of lower tensile strength are rolled.
- Method according to one or more of the claims 1 to 3, characterised thereby that the starting material is intermediately stored before introduction into the roll train.
- Strip casting plant (1) with multi-stand continuous rolling mill (6) arranged thereafter for the manufacture of hot-rolled steel strip from a strip-shaped continuously cast starting material in successive working steps, wherein the strip-shaped starting material is brought to hot-rolling temperature after hardening and is introduced into the rolling mill (6) for rolling out to finished strip, wherein narrow finished strips of between 1000 and 2000 millimetres in width are rolled, for the performance of the method according to one or more of the preceding claims, wherein the rolling mill (6) consists of three (6', 6'', 6''') or four roll stands, characterised thereby that all working rolls of the rolling mill (6) have the same roll diameter of between 400 and 800 millimetres and that working rolls (6', 6'') with working roll drive are provided at least in the case of the first two stands.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT87114449T ATE74296T1 (en) | 1986-11-06 | 1987-10-03 | STRIP CASTING LINE WITH SUBSEQUENT MULTI-STAND CONTINUOUS ROLLING MILL. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3637893 | 1986-11-06 | ||
DE3637893A DE3637893C2 (en) | 1986-11-06 | 1986-11-06 | Process and plant for the production of hot-rolled steel strip and strip casting plant |
Publications (4)
Publication Number | Publication Date |
---|---|
EP0266564A2 EP0266564A2 (en) | 1988-05-11 |
EP0266564A3 EP0266564A3 (en) | 1988-09-14 |
EP0266564B1 EP0266564B1 (en) | 1992-04-01 |
EP0266564B2 true EP0266564B2 (en) | 1999-07-07 |
Family
ID=6313346
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87114449A Expired - Lifetime EP0266564B2 (en) | 1986-11-06 | 1987-10-03 | Strip casting installation with a following multiple stand continuous rolling mill |
Country Status (18)
Country | Link |
---|---|
US (1) | US4817703A (en) |
EP (1) | EP0266564B2 (en) |
JP (1) | JPH082449B2 (en) |
KR (1) | KR960002400B1 (en) |
CN (1) | CN1042204C (en) |
AT (1) | ATE74296T1 (en) |
BR (1) | BR8705955A (en) |
CA (1) | CA1320063C (en) |
DD (1) | DD262602A5 (en) |
DE (2) | DE3637893C2 (en) |
ES (1) | ES2029818T5 (en) |
GR (1) | GR3004260T3 (en) |
IN (1) | IN170340B (en) |
LT (1) | LT3832B (en) |
LV (1) | LV10934B (en) |
MX (1) | MX160204A (en) |
RU (1) | RU2057601C1 (en) |
ZA (1) | ZA877350B (en) |
Families Citing this family (25)
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DE58901955D1 (en) * | 1988-03-17 | 1992-09-03 | Mannesmann Ag | PLANT FOR PRODUCING HOT-ROLLED STEEL STRIP. |
US5307864A (en) * | 1988-05-26 | 1994-05-03 | Mannesmann Aktiengesellschaft | Method and system for continuously producing flat steel product by the continuous casting method |
DE3839151A1 (en) * | 1988-11-17 | 1990-05-23 | Mannesmann Ag | METHOD FOR PRODUCING HOT-ROLLED STEEL STRIP FROM A STRIP-SHAPED PRE-MATERIAL |
US5082047A (en) * | 1989-07-31 | 1992-01-21 | Bricmanage, Inc. | Method of continuously casting and rolling metallic strip |
DE3929722A1 (en) * | 1989-09-07 | 1991-03-14 | Schloemann Siemag Ag | PLANT FOR THE PRODUCTION OF STEEL STRIP |
NL9100911A (en) * | 1991-03-22 | 1992-10-16 | Hoogovens Groep Bv | Mfg. hot-rolled steel strip with single pass - for the sole reduction means through two-high roll stand |
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 |
JP2845097B2 (en) * | 1993-03-18 | 1999-01-13 | 株式会社日立製作所 | Hot steel plate rolling equipment and rolling method |
US5430930A (en) * | 1993-10-12 | 1995-07-11 | Italimpianti Of America, Inc. | Method of manufacturing hot strip |
JP3063518B2 (en) * | 1993-12-27 | 2000-07-12 | 株式会社日立製作所 | Continuous casting device and continuous casting system |
DE4402402B4 (en) * | 1994-01-27 | 2004-05-13 | Sms Demag Ag | Process for producing hot-rolled steel strip from continuously cast starting material and plant for carrying out the process |
US5632177A (en) * | 1994-03-01 | 1997-05-27 | Hitachi, Ltd. | System and method for manufacturing thin plate by hot working |
IT1267916B1 (en) * | 1994-03-31 | 1997-02-18 | Danieli Off Mecc | PROCEDURE FOR THE PRODUCTION OF BELT STARTING FROM THIN SLABS AND RELATIVE PLANT |
DE19613718C1 (en) * | 1996-03-28 | 1997-10-23 | Mannesmann Ag | Process and plant for the production of hot-rolled steel strip |
DE19725434C2 (en) * | 1997-06-16 | 1999-08-19 | Schloemann Siemag Ag | Process for rolling hot wide strip in a CSP plant |
DE19814223A1 (en) * | 1998-03-31 | 1999-10-07 | Schloemann Siemag Ag | Process for the production of microalloyed structural steels |
DE102006054932A1 (en) | 2005-12-16 | 2007-09-13 | Sms Demag Ag | Method and device for producing a metal strip by casting rolls |
DE102008020412A1 (en) | 2007-08-24 | 2009-02-26 | Sms Demag Ag | Method and device for producing a metal strip by casting rolls |
DE102008003222A1 (en) * | 2007-09-13 | 2009-03-19 | Sms Demag Ag | Compact flexible CSP system for continuous, semi-continuous and batch operation |
CN102581008A (en) * | 2012-03-01 | 2012-07-18 | 河北钢铁股份有限公司唐山分公司 | Processing method for producing low-cost high-formability IF (interstitial-free) steel |
CN102814323B (en) * | 2012-08-26 | 2014-07-09 | 西部钛业有限责任公司 | Processing method for rolling broad zirconium plate |
UA115172C2 (en) | 2013-03-08 | 2017-09-25 | Смс Груп Гмбх | Method for producing a metal strip by casting and rolling |
KR101755236B1 (en) * | 2015-10-21 | 2017-07-10 | 주식회사 포스코 | Endless rolling apparatus and method |
CN105458018B (en) * | 2016-01-13 | 2018-03-23 | 中冶东方工程技术有限公司 | Casting and rolling machine couples swing position control device and its control method with conticaster |
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US3358358A (en) * | 1964-12-31 | 1967-12-19 | United States Steel Corp | Method of reducing width of metal slabs |
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 |
AT280191B (en) * | 1966-12-01 | 1970-04-10 | Gerb Boehler & Co Ag | Process for the production of rolled products from continuously cast products using two pairs of rolls |
DE1816849C3 (en) * | 1968-12-24 | 1973-12-13 | Demag Ag, 4100 Duisburg | Process for continuous casting and subsequent rolling from the casting heat of steel |
JPS53112247A (en) * | 1977-03-11 | 1978-09-30 | Ishikawajima Harima Heavy Ind Co Ltd | Method and apparatus for rolling continuously cast sliug |
JPS54153750A (en) * | 1978-05-26 | 1979-12-04 | Toshiba Corp | Method and apparatus for manufacturing metal molding |
JPS5550912A (en) * | 1978-10-12 | 1980-04-14 | Toshiba Corp | Speed controller for rolling mill |
DE2917784A1 (en) * | 1979-05-03 | 1980-11-13 | Krupp Gmbh | METHOD FOR PRODUCING FLAT MATERIAL FROM ALUMINUM, COPPER, STEEL OR ALLOYS OF THESE MATERIALS BY MEANS OF A CONTINUOUSLY WORKING CASTING MACHINE, AND DEVICE FOR CARRYING OUT THE METHOD |
JPS58100903A (en) * | 1981-12-09 | 1983-06-15 | Kawasaki Steel Corp | Train disposed with special continuous casting machine and hot rolling mill |
US4519118A (en) * | 1982-10-26 | 1985-05-28 | Kennecott Corporation | Hot mill self-centering roll design |
DE3241745C2 (en) * | 1982-11-11 | 1985-08-08 | Mannesmann AG, 4000 Düsseldorf | Process for the production of hot-rolled steel strip from continuously cast raw material in directly successive work steps |
JPS60121009A (en) * | 1983-12-02 | 1985-06-28 | Sumitomo Metal Ind Ltd | Manufacture of hot rolled strip |
JPS60216904A (en) * | 1984-04-13 | 1985-10-30 | Mitsubishi Heavy Ind Ltd | Rolling method of thin metallic-sheet manufactured by continuous casting |
JPS6156708A (en) * | 1984-08-28 | 1986-03-22 | Sumitomo Metal Ind Ltd | Line of continuous hot rolling mill equipment |
DE3525457C3 (en) * | 1985-07-17 | 1999-06-10 | Mannesmann Ag | Rolling mill for the production of hot-rolled steel strips |
-
1986
- 1986-11-06 DE DE3637893A patent/DE3637893C2/en not_active Expired - Lifetime
-
1987
- 1987-09-30 ZA ZA877350A patent/ZA877350B/en unknown
- 1987-10-03 AT AT87114449T patent/ATE74296T1/en not_active IP Right Cessation
- 1987-10-03 DE DE8787114449T patent/DE3777954D1/en not_active Expired - Lifetime
- 1987-10-03 EP EP87114449A patent/EP0266564B2/en not_active Expired - Lifetime
- 1987-10-03 ES ES87114449T patent/ES2029818T5/en not_active Expired - Lifetime
- 1987-10-27 IN IN778/MAS/87A patent/IN170340B/en unknown
- 1987-10-30 DD DD87308426A patent/DD262602A5/en not_active IP Right Cessation
- 1987-10-30 MX MX9089A patent/MX160204A/en unknown
- 1987-11-02 RU SU874203574A patent/RU2057601C1/en active
- 1987-11-02 KR KR1019870012228A patent/KR960002400B1/en not_active IP Right Cessation
- 1987-11-03 CN CN87107665A patent/CN1042204C/en not_active Expired - Lifetime
- 1987-11-05 BR BR8705955A patent/BR8705955A/en not_active IP Right Cessation
- 1987-11-05 JP JP62278437A patent/JPH082449B2/en not_active Expired - Lifetime
- 1987-11-06 CA CA000551190A patent/CA1320063C/en not_active Expired - Fee Related
- 1987-11-06 US US07/118,584 patent/US4817703A/en not_active Expired - Lifetime
-
1992
- 1992-04-02 GR GR920400611T patent/GR3004260T3/el unknown
-
1993
- 1993-06-08 LV LVP-93-520A patent/LV10934B/en unknown
-
1994
- 1994-01-13 LT LTIP1769A patent/LT3832B/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
LTIP1769A (en) | 1995-07-25 |
KR880005980A (en) | 1988-07-21 |
IN170340B (en) | 1992-03-14 |
KR960002400B1 (en) | 1996-02-17 |
RU2057601C1 (en) | 1996-04-10 |
ES2029818T3 (en) | 1992-10-01 |
EP0266564B1 (en) | 1992-04-01 |
BR8705955A (en) | 1988-06-14 |
LV10934A (en) | 1995-12-20 |
LV10934B (en) | 1996-06-20 |
CN1042204C (en) | 1999-02-24 |
DE3637893A1 (en) | 1988-05-19 |
US4817703A (en) | 1989-04-04 |
EP0266564A2 (en) | 1988-05-11 |
JPH082449B2 (en) | 1996-01-17 |
CA1320063C (en) | 1993-07-13 |
EP0266564A3 (en) | 1988-09-14 |
CN87107665A (en) | 1988-06-29 |
MX160204A (en) | 1989-12-26 |
LT3832B (en) | 1996-04-25 |
JPS63132703A (en) | 1988-06-04 |
ATE74296T1 (en) | 1992-04-15 |
DD262602A5 (en) | 1988-12-07 |
ZA877350B (en) | 1989-05-30 |
DE3637893C2 (en) | 1996-02-08 |
DE3777954D1 (en) | 1992-05-07 |
GR3004260T3 (en) | 1993-03-31 |
ES2029818T5 (en) | 1999-11-16 |
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