EP2209573B2 - Method for continuous austenitic rolling of a preliminary strip, which is produced in a continuous casting process - Google Patents
Method for continuous austenitic rolling of a preliminary strip, which is produced in a continuous casting process Download PDFInfo
- Publication number
- EP2209573B2 EP2209573B2 EP08852273.5A EP08852273A EP2209573B2 EP 2209573 B2 EP2209573 B2 EP 2209573B2 EP 08852273 A EP08852273 A EP 08852273A EP 2209573 B2 EP2209573 B2 EP 2209573B2
- Authority
- EP
- European Patent Office
- Prior art keywords
- rolling
- thickness
- aust
- casting
- strip
- 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.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
- B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
Definitions
- the invention relates to a process for the continuous austenitic rolling of a pre-strip produced in a continuous casting process in a continuous casting plant with a casting thickness of less than 300 mm, preferably with a casting thickness of less than 150 mm, by thickness reduction steps in at least one of several successive rolling stands - Rolling mill to a hot strip with a Walzenddicke between 0.5 and 15 mm and subsequent transverse division of the rolled hot strip in waist sizes or bundle lengths before winding in a storage device.
- the invention relates to a combined casting and rolling plant for the production of austenitic rolled hot strip in a continuous continuous casting and rolling process with a continuous casting for casting steel strands with a casting thickness of less than 300 mm, preferably for casting steel strands with a casting thickness of less as 150 mm, and with at least one rolling mill, which comprises a plurality of successive rolling stands, for producing a austenitic temperature range rolled hot strip with a Walzenddicke between 0.5 and 15 mm and a last mill downstream subdivision and strip storage device.
- a process according to the invention for the continuous austenitic rolling of a pre-strip produced in a continuous casting process is to be understood as a process in which the pre-strip produced in a continuous casting line without pre-strip cutting section has a casting speed into the first rolling stand or the first rolling line and transport speed into each with a reduction in thickness subsequent rolling mill is introduced to produce hot strip.
- the combined casting and rolling mill is configured in its structural configuration so that the cast pre-strip enters the first mill stand of the first mill train without a pre-strip parting cut at casting speed.
- a combined casting and rolling process in which a steel strip cast in a continuous casting plant is rolled in two deformation steps directly from the casting heat and without a separating cut between the casting plant and the downstream rolling devices.
- a first rolling deformation of the cast steel strand takes place immediately after the solidification in the outlet region of the continuous casting plant with a single roll stand at a strand temperature of about 1100 ° C.
- the further rolling takes place in a multi-stand rolling train with a rolling speed which depends on the casting speed, which is a maximum of 5 m / min, and the degree of deformation achieved in the first rolling stand.
- an inductive reheating of the steel strip between the first roll stand and the subsequent rolling train is absolutely necessary. Intermediate heating stages between the individual rolling mills of the rolling train are also provided.
- a combined casting and rolling process in which a cast steel strand produced in a continuous casting plant is roll-formed without prior transverse division in two successive stages of deformation into a rollable material having cold rolling properties.
- a first Dikkenredulement the cast steel strand is still within the continuous casting machine at a time in which the steel strand still has a liquid core (liquid core reduction).
- a second reduction in the thickness of the subsequently solidified steel strand takes place immediately after leaving the continuous casting machine in a multi-stand rolling mill at a strip temperature of about 1100 ° C. in the austenitic region.
- the steel strip of a casting thickness ⁇ 100 mm is hot-rolled onto a coilable hot strip with a strip thickness of 10-30 mm.
- a method for the production of hot rolled steel strip is known in which the cast steel strand is fed without separating cut directly to a multi-stand rolling mill and finish rolled in the austenitic region.
- a specific minimum number of deformation steps is proposed for a specific, relative to a slab width of 1.0 m volume flow, which is greater than 0.487 m 2 / min, in order to ensure an austenitic final rolling safely. Due to different circumstances in the casting process, a steel strip temperature at the end of the continuous casting plant can no longer be ensured due to operational conditions, which no longer guarantees austenitic rolling in the last stand of the rolling train and can not be corrected by the homogenization before the first rolling stand.
- the object of the present invention is therefore to avoid the disadvantages of the known prior art and a method for the continuous austenitic rolling of a pre-strip produced in a continuous casting process with minimized capital expenditure by specifying the maximum number of scaffolds, intermediate heaters and / or heating powers and in dependence of proposed production and material indicators.
- These include, for example, the final roll thickness (of the strip to be wound) and the casting thickness and the austenite limit temperature defined by the chemical analysis.
- Another object of the invention is to optimize the overall plant configuration for carrying out the rolling process based on an expected production spectrum under the constraint that slab thicknesses are from 30 to 150 mm and the composite production wide rate 2.5 to 4.5 t / min Hot strip, preferably 3.0 to 3.6 t / min (at a typical hot-plate density of 7.4 t / m 3 ) should be.
- rolling train is to be understood as meaning the successive arrangement of a plurality of rolling stands, the stand spacing of adjacent rolling stands not exceeding 5.6 m, preferably 4.9 m, and no intermediate heating stage being arranged between adjacent rolling stands or an intermediate heating of the rolled strip taking place.
- Each rolling stand comprises a pair of work rolls.
- this calculation rule determines the number of necessary thickness reduction steps or the number of required rolling stands of several successively arranged rolling mills or groups of rolling mills, if between the individual rolling mills or groups of rolling mills interim heating devices are provided to increase the strip temperature.
- the calculation rule is applied to a second or further rolling train arranged downstream of the continuous casting plant, all the already existing thickness reduction steps in the first rolling train (s) are taken into account by the factor m, the original slab thickness h Br being taken into account.
- m before 0, there still exist no upstream thickness reduction steps.
- the number n of the thickness reduction steps activated within a rolling mill becomes the condition T VB . i - T aust 75 + 1.5. 10 log H br 2 MVOR , 1.4 d end . i 2.2 , T VB . i - T aust T aust 7.4. H br , v G 4000 - 2 ⁇ n ⁇ T VB . i - T aust 75 + 1.5. 10 log H br 2 MVOR , 1.4 d end . i 2.2 , T VB . i - T aust T aust 7.4. H br , v G 4000 ; n ⁇ N certainly. This means that the number of thickness reduction steps activated within each rolling train according to the product-specific requirements is determined by the two largest natural numbers N and can be selected from the set of natural numbers N resulting from the mathematical condition.
- this method allows a determination of the optimum number of thickness reduction steps or rolling stands to be activated in each of the rolling mills downstream from the amount of existing rolling stands.
- all thickness reduction steps in a rolling train and at a casting thickness h Br > 60 mm are carried out in at least two rolling mills.
- rolling can be carried out in a rolling mill as well as in two rolling mills, depending on various influencing factors. For example, rolling in heavy plate production would preferably take place in one rolling line and preferably in two rolling lines during hot strip production.
- a division into at least two groups of rolling stands is expedient if the final rolling thickness is less than 3.5 mm lies.
- the method can be used advantageously if the preliminary strip produced in a continuous casting process is produced with a casting thickness of at least 30 mm, preferably with a casting thickness of at least 60 mm.
- the method is particularly advantageously applicable if, for casting thicknesses of 30 to 300 mm, preferably at casting thicknesses of 60 to 150 mm, a final rolling thickness of 0.5 to 15 mm, preferably from 0.8 to 12 mm and in particular from 1.0 to 8 mm, to be achieved.
- the calculation rule for determining the number of n i or n consecutive thickness reduction steps for each rolling mill based on the condition T VB . i - T aust 75 + 1.5. 10 log H br 2 MVOR , 1.4 d end . i 2.2 , T VB . i - T aust T aust 7.4. H br , v G 4000 - 2 ⁇ n ⁇ T VB . i - T aust 75 + 1.5. 10 log H br 2 MVOR , 1.4 d end . i 2.2 , T VB . i - T aust T aust 7.4.
- H br , v G 4000 ; n ⁇ N is associated with a process computer on a process control level as a mathematical model and from this corresponding activation signals for activating individual rolling stands of one or more rolling mills are transmitted to individual control loops of one or more rolling mills, wherein state information about the cast pre-strip of a process computer of the upstream continuous casting are taken into account and optionally in particular the required temperature T vB'i ' ie the average cross-sectional temperature of the respective Vorbandes at the end of the intermediate heating before the rolling mill.
- a combined caster and mill for the production of austenitic rolled hot strip in a continuous continuous casting and rolling process may include a continuous caster for casting steel cords having a casting thickness of less than 300 mm, preferably for casting steel cords having a casting thickness of less than 150 mm. and at least one rolling mill comprising a plurality of successive rolling mills for producing a hot rolled strip rolled in the austenitic temperature range with a rolling thickness of between 0.5 and 15.0 mm and a cutting plant and strip storage device arranged downstream of the last rolling stand.
- the design of the combined casting and rolling plant is based on a future customer-oriented and coordinated intended production program for hot strip.
- An essential goal is to ensure a continuous exclusively austenitic rolling of a hot strip with a compact, wide production spectrum covering casting and rolling mill.
- the number n of rolling mills installed within a rolling mill is the condition T VB . i - T aust 75 + 1.5. 10 log H br 2 MVOR , 1.4 d end . i 2.2 , T VB . i - T aust T aust - 1 ⁇ n ⁇ T VB . i - T aust 75 + 1.5. 10 log H br 2 MVOR , 1.4 d end . i 2.2 , T VB . i - T aust T aust ; n ⁇ N determined or limited.
- an intermediate heating device for raising the cross-section-averaged pre-strip temperature to T VB, i to a correspondingly sufficient temperature level is arranged between each successive rolling train W i-1 and W i .
- the intermediate heating device is designed as a device for inductive transverse field heating.
- the casting plant on which the combined casting and rolling plant is based comprises a continuous casting mold that can be set to different casting thicknesses or interchangeable continuous casting molds and a downstream strand guide with gap-adjustable strand segments.
- a continuous casting mold and strand guide set to a casting thickness h Br ⁇ 45 mm it is expedient to activate exactly one rolling mill with n rolling stands and in the case of a continuous casting mold and strand guide set to a casting thickness hBr> 60 mm at least two rolling mills each having a specific number of rolling stands activated.
- the rolling may be carried out in a rolling mill as well as in two rolling mills, depending on various influencing factors, with an intermediate heating device between the successive rolling mills.
- the work-roll diameter of the work rolls in the first rolling line after the casting plant is expedient for the work-roll diameter of the work rolls in the first rolling line after the casting plant to have a diameter range of 650 mm to 980 mm is to achieve the greatest possible thickness reductions at very high slab temperatures or pre-strip temperatures.
- a preferred range of working roll diameters is between 650 mm and 800 mm.
- the working roll diameter of the work rolls in the second rolling line after the caster is in a diameter range of 500 mm to 870 mm, since the intermediate strip thickness is already lower.
- a preferred range of working roll diameters for this case is between 500 mm and 720 mm.
- the working roll diameter should decrease when the inlet thickness of the rolling stock is lower.
- FIGS. 1 to 3 Several possible embodiments of a combined casting and rolling plant are shown, which comprises a continuous casting plant for continuous casting of a steel strand with thin slab or center slab cross section and an immediately following rolling mill W for austenitic rolling of the cast strand or Vorbandes.
- the continuous casting machine G of conventional design according to the prior art is indicated by a continuous mold 3 and a strand guide 4 with strand guide rollers 5.
- the continuous casting mold 3 with subsequent strand guide determines the casting thickness h Br of the pre-strip 6, which is fed immediately after a deflection of a substantially vertical casting direction in a horizontal transport direction of the rolling train W or facultative previously passes through a homogenizer 7, in which a homogenization of the temperature distribution in Support could be sought.
- the pre-strip 6 with the casting thickness h Br occurs - without a separating cut is performed - with casting speed v g and with a cross-section-averaged pre-strip temperature T VB, 1 in the first roll stand 8a of the rolling train W.
- the number of rolling stands 8a, 8b,..., 8n used in the rolling train W is determined by the desired final thickness, d end, 1 and by the final rolling temperature in the rolling stand 8n, which must necessarily exceed the steel-grade-dependent austenite formation limit temperature T aust .
- the number of rolling stands results from the largest natural number in the field of possible result values.
- the hot-rolled strip passes through a cooling section 9, is divided according to predetermined bundle weights with a dividing line 10 formed by a dividing shears 10 and wound in a band reeling device 11 in coils.
- the output strand thickness determined in the continuous casting plant and the desired final rolling thickness of the hot strip wound into a bundle determine not only the steel quality but also the number of necessary rolling stands / thickness reduction steps in order to achieve an end product with the required material and structural properties.
- the cross-section-averaged pre-strip temperature T VB, 1 at the end of the casting machine and thus before entry into the first roll stand is variable only within very narrow limits and depends on the operating conditions of the continuous casting machine.
- the steel grade dependent austenite formation limit temperature is a material constant that is essentially fixed for each grade of steel.
- the pre-strip temperature usually decreases continuously, and the greater the lower the rolling speed, or the input side, the casting speed.
- the above-mentioned, developed formula provides the determination of the max. meaningful number of rolling stands or thickness reduction steps to be made in a rolling train, wherein the strip temperature does not fall below the austenite formation limit temperature in the rolling mill, taking into account all Vorverformungsöne. If the aim is slab thicknesses> 50 mm rolling thicknesses ⁇ 3.5 mm, the arrangement of two or more rolling mills W1, W2, W3 is necessary, as in the embodiments according to Figures 2 and 3 shown.
- the rolling train W1 comprises a certain maximum number of rolling stands 8a, 8b,..., 8n, which is to be determined with the calculation rule given above.
- the rolling train W2 has a certain maximum number of rolling stands 13a, 13b, ..., 13m, which is also to be determined with the above-mentioned calculation rule, wherein for W 2, the number of already in the rolling mill W1 made thickness reduction steps in the Calculation rule by the exponent m before to take into account.
- the intermediate heater 12 the cross-sectional averaged temperature of the pre-strip is again brought to a sufficiently high temperature level above the austenite formation limit temperature of the pre-strip reduced in the rolling train W1 to perform the austenitic rolling passes in the rolling train W2.
- the temperature increase achieved with the intermediate heating device is dependent on demand in the range of 50 K up to 450 K, preferably in the range of 120 K to 350 K.
- FIG. 3 schematically illustrated combined casting and rolling plant is equipped with three rolling mills W1, W2 and W3 and particularly suitable if starting from a relatively large casting thickness (eg.> 150 mm) and long metallurgical strand guide length, or relatively low averaged slab temperature T VB austenitic rolled Hot strip with a very low roll thickness (eg ⁇ 1.2 mm) to be produced.
- a relatively large casting thickness eg.> 150 mm
- T VB austenitic rolled Hot strip with a very low roll thickness (eg ⁇ 1.2 mm)
- the determination of the number of rolling mills required in the rolling train W3 is analogous to the determination of the maximum number of rolling mills in the rolling train W2.
- the calculation rule for the rolling train W 2 in the case of the exponent m all pre-deformation stages in the rolling mills W 1 and W 2 are to be taken into account.
- a multi-layered product range can be produced very easily on a combined casting and rolling plant of the type according to the invention if an arrangement of the rolling mills has already been arranged in the conceptual phase of the plant production for this product range. As a result, a product-specific activation of required rolling stands is possible. Therefore, the plant will usually actually the respective maximum number of stands in each rolling mill, depending on max. Slab thickness, minimum ribbon take-up thickness, the respective intermediate strip thicknesses d end, i, and the intermediate heating temperatures T VB, i according to the developed formula and intermediate heating means.
- operational temperature variations in the production of the pre-strip in the continuous casting can be achieved by appropriate control of the rolling mills in particular, by activating an optimal roll stand configuration.
- This can take place on the process control level P, which receives corresponding status information from a process computer PS of the upstream continuous casting plant and transmits activation signals to the individual control loops PW1 and PW2 of the rolling mills W1 and W2 ( Fig. 4 ).
- the special calculation rule is assigned here as a mathematical model to the process computer at the process control level, whereby the current average or steady-state mass-specific mass flow rate is to be included as a multiplication factor. For this case, the number of thickness reduction steps in the individual stands is determined according to the condition n i ⁇ T VB .
- the intermediate heating device 12 is integrated into the control loop at the process control level P.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Description
Die Erfindung betrifft ein Verfahren zum kontinuierlichen austenitischen Walzen eines in einem kontinuierlichen Gießprozess in einer Stranggießanlage mit einer Gießdicke von weniger als 300 mm, vorzugsweise mit einer Gießdicke von weniger als 150 mm, hergestellten Vorbandes durch Dickenreduktionsschritte in mindestens einer - von mehreren aufeinander folgenden Walzgerüsten gebildeten - Walzstraße zu einem Warmband mit einer Walzenddicke zwischen 0,5 und 15 mm und nachfolgender Querteilung des gewalzten Warmbandes in Bundgrößen bzw. Bundlängen vor dem Aufwickeln in einer Speichereinrichtung.The invention relates to a process for the continuous austenitic rolling of a pre-strip produced in a continuous casting process in a continuous casting plant with a casting thickness of less than 300 mm, preferably with a casting thickness of less than 150 mm, by thickness reduction steps in at least one of several successive rolling stands - Rolling mill to a hot strip with a Walzenddicke between 0.5 and 15 mm and subsequent transverse division of the rolled hot strip in waist sizes or bundle lengths before winding in a storage device.
Weiters betrifft die Erfindung eine kombinierte Gieß- und Walzanlage zur Herstellung von austenitisch gewalztem Warmband in einem kontinuierlich fortlaufenden Gieß- und Walzprozess mit einer Stranggießanlage zum Gießen von Stahlsträngen mit einer Gießdicke von weniger als 300 mm, vorzugsweise zum Gießen von Stahlsträngen mit einer Gießdicke von weniger als 150 mm, und mit mindestens einer Walzstraße, die mehrere aufeinander folgende Walzgerüste umfasst, zur Erzeugung eines im austenitischen Temperaturbereich gewalzten Warmbandes mit einer Walzenddicke zwischen 0,5 und 15 mm und einer dem letzten Walzgerüst nachgeordneten Zerteilanlage und Bandspeichereinrichtung.Furthermore, the invention relates to a combined casting and rolling plant for the production of austenitic rolled hot strip in a continuous continuous casting and rolling process with a continuous casting for casting steel strands with a casting thickness of less than 300 mm, preferably for casting steel strands with a casting thickness of less as 150 mm, and with at least one rolling mill, which comprises a plurality of successive rolling stands, for producing a austenitic temperature range rolled hot strip with a Walzenddicke between 0.5 and 15 mm and a last mill downstream subdivision and strip storage device.
Unter einem erfindungsgemäßen Verfahren zum kontinuierlichen austenitischen Walzen eines in einem kontinuierlichen Gießprozess hergestellten Vorbandes ist ein Verfahren zu verstehen, bei dem das in einer Stranggießanlage hergestellte Vorband ohne Vorbandtrennschnitt mit Gießgeschwindigkeit in das erste Walzgerüst oder die erste Walzstraße und mit einer vorgenommene Dickenreduzierungen berücksichtigenden Transportgeschwindigkeit in jede nachfolgende Walzstraße eingeleitet wird, um Warmband zu erzeugen. Gleichermaßen ist die kombinierte Gieß- und Walzanlage in ihrem strukturellen Aufbau so konfiguriert, dass das gegossene Vorband ohne Vorbandtrennschnitt mit Gießgeschwindigkeit in das erste Walzgerüst der ersten Walzstraße eintritt.A process according to the invention for the continuous austenitic rolling of a pre-strip produced in a continuous casting process is to be understood as a process in which the pre-strip produced in a continuous casting line without pre-strip cutting section has a casting speed into the first rolling stand or the first rolling line and transport speed into each with a reduction in thickness subsequent rolling mill is introduced to produce hot strip. Likewise, the combined casting and rolling mill is configured in its structural configuration so that the cast pre-strip enters the first mill stand of the first mill train without a pre-strip parting cut at casting speed.
Aus der
Aus der
Aus der
Aus der
Aufgabe der vorliegenden Erfindung ist es daher, die Nachteile des bekannten Standes der Technik zu vermeiden und ein Verfahren zum kontinuierlichen austenitischen Walzen eines in einem kontinuierlichen Gießprozesses hergestellten Vorbandes mit minimiertem Investitionsaufwand durch Angabe der maximal erforderlichen Gerüstanzahl, Zwischenheizungen und/oder-heizleistungen und in Abhängigkeit von gewünschten Produktions- und Materialkennzahlen vorzuschlagen. Darunter sind beispielsweise die Endwalzdicke (des aufzuwickelnden Bandes) sowie die Gießdicke und die durch die chemische Analyse definierten Austenitgrenztemperatur zu verstehen.The object of the present invention is therefore to avoid the disadvantages of the known prior art and a method for the continuous austenitic rolling of a pre-strip produced in a continuous casting process with minimized capital expenditure by specifying the maximum number of scaffolds, intermediate heaters and / or heating powers and in dependence of proposed production and material indicators. These include, for example, the final roll thickness (of the strip to be wound) and the casting thickness and the austenite limit temperature defined by the chemical analysis.
Eine weitere Aufgabe der Erfindung besteht darin, die Gesamtanlagenkonfiguration zur Durchführung des Walzverfahrens auf Basis eines zu erwartenden Produktionspektrums unter der Nebenbedingung zu optimieren, dass Brammendicken von 30 bis 150 mm betragen und die breitenspezifische Erzeugungsrate der Verbundanlage 2,5 bis 4,5 t/min Warmband, vorzugsweise 3,0 bis 3,6 t/min (bei einer typischen Heißbrammendichte von 7,4 t/m3) betragen soll.Another object of the invention is to optimize the overall plant configuration for carrying out the rolling process based on an expected production spectrum under the constraint that slab thicknesses are from 30 to 150 mm and the composite production wide rate 2.5 to 4.5 t / min Hot strip, preferably 3.0 to 3.6 t / min (at a typical hot-plate density of 7.4 t / m 3 ) should be.
Diese Aufgabe wird bei einem Verfahren gemäß dem Oberbegriff des Anspruchs 1 dadurch gelöst, dass das Vorband in jeder der Stranggießanlage nachgeordneten Walzstraße mit einer Anzahl von ni Dickenreduktionsschritten dickenreduziert wird, wobei die Anzahl ni der durchzuführenden Dickenreduktionsschritte durch die Bedingung
- TVB,i [°C] die querschnittsgemittelte Vorbandtemperatur am Ende der Gießmaschine (im Bereich der Sumpfspitze) bzw. am Ende einer vor der i-ten Walzstraße installierten Zwischenerwärmungseinrichtung,
- Taust [°C] die stahlgüteabhängige Austenitbildungs-Grenztemperatur (austenit. Endwalztemperatur),
- hBr [mm] die Brammen-/Gießdicke bei Durcherstarrung (= Sumpfspitze),
- d end,i [mm] die Banddicke nach den ni Dickenreduktionsschritten, der i-ten Walzstraße,
- mvor die Anzahl aller ab der Brammendurcherstarrung erfolgten Dickenreduktionsschritte bis zum Einlauf in das erste Gerüst der nachfolgenden i-ten Walzstraße,
- vg [m/min] die Brammengießgeschwindigkeit
- T VB, i [° C] is the cross-sectional average pre-strip temperature at the end of the casting machine (in the area of the sump tip) or at the end of an intermediate heating device installed in front of the i-th rolling line,
- T aust [° C] the steel grade dependent austenite formation limit temperature (austenite finish rolling temperature),
- h Br [mm] the slab / casting thickness when solidified (= sump tip),
- d end, i [mm], the strip thickness after the n i the thickness reduction steps, the i-th rolling mill,
- in front of the number of all thickness reduction steps taken from the slab solidification until the entry into the first stand of the following i-th rolling train,
- v g [m / min] is the slab casting speed
Mit dieser Berechnungsvorschrift kann in einfacher Weise für eine bestimmte Stahlqualität bei festgelegten Ein- und Ausgangsbedingungen (Bandformate, Temperaturen) die maximale Anzahl der notwendigen Dickenreduktionsschritte bzw. erforderlichen Walzgerüste einer Walzstraße ermittelt werden, bei denen auch im letzten Dickenreduktionsschritt bzw. Walzgerüst der Walzstraße noch eine Walzung im austenitischen Bereich möglich ist. Und in weiterer Folge wird dadurch bestimmt, wie viele Zwischenerwärmungen und welche Zwischenerwärmungsleistungen erforderlich werden, um eine bestimmte Warmbandenddicke, durchgehend austenitisch gewalzt, zu erreichen.With this calculation rule can be determined in a simple manner for a given steel quality at specified input and output conditions (tape formats, temperatures), the maximum number of required thickness reduction steps or rolling stands of a rolling mill, in which even in the last thickness reduction step or rolling mill of the rolling mill Rolling in the austenitic region is possible. And subsequently, how many intermediate heats and which intermediate heats are required to determine a given hot strip thickness, austenitic rolled throughout.
Unter dem Begriff "Walzstraße" ist die aufeinanderfolgende Anordnung mehrerer Walzgerüste zu verstehen, wobei der Gerüstabstand benachbarter Walzgerüste 5,6 m, vorzugsweise 4,9 m, nicht überschreitet und zwischen benachbarten Walzgerüsten keine Zwischenerwärmungsstufe angeordnet ist oder eine Zwischenerwärmung des Walzbandes stattfindet. Jedes Walzgerüst umfasst ein Arbeitswalzenpaar.The term "rolling train" is to be understood as meaning the successive arrangement of a plurality of rolling stands, the stand spacing of adjacent rolling stands not exceeding 5.6 m, preferably 4.9 m, and no intermediate heating stage being arranged between adjacent rolling stands or an intermediate heating of the rolled strip taking place. Each rolling stand comprises a pair of work rolls.
Weiters ist es mit dieser Berechnungsvorschrift auch möglich, die Anzahl der notwendigen Dickenreduktionsschritte bzw. die Anzahl der erforderlichen Walzgerüste mehrerer hintereinander angeordneter Walzstraßen bzw. Gruppen von Walzgerüsten zu bestimmen, wenn zwischen den einzelnen Walzstraßen oder Gruppen von Walzgerüsten Zwischenerwärmungseinrichtungen zur Erhöhung der Bandtemperatur vorgesehen sind. Bei Anwendung der Berechnungsvorschrift auf eine der Stranggießanlage nachgeordnete zweite oder weitere Walzstraße werden sämtliche, bereits erfolgte Dickenreduktionsschritte in der/den ersten Walzstraße(n) durch den Faktor mvor berücksichtigt, wobei die ursprüngliche Brammendicke hBr berücksichtigt bleibt. Somit kann auch bei mehreren Walzstraßen oder Gruppen von Walzgerüsten für jede dieser Gruppen die maximal sinnvolle Anzahl von Dickenreduktionsschritten ermittelt werden. Bei der ersten der Stranggießanlage unmittelbar nachgeordneten Walzstraße gilt mvor = 0, da ja noch keinerlei vorgelagerte Dickenreduktionsschritte vorliegen.Furthermore, it is also possible with this calculation rule to determine the number of necessary thickness reduction steps or the number of required rolling stands of several successively arranged rolling mills or groups of rolling mills, if between the individual rolling mills or groups of rolling mills interim heating devices are provided to increase the strip temperature. When the calculation rule is applied to a second or further rolling train arranged downstream of the continuous casting plant, all the already existing thickness reduction steps in the first rolling train (s) are taken into account by the factor m, the original slab thickness h Br being taken into account. Thus, even with multiple rolling mills or groups of rolling stands for each of these groups, the maximum reasonable number of thickness reduction steps can be determined. In the first of the continuous casting immediately downstream rolling mill applies m before = 0, there still exist no upstream thickness reduction steps.
Vorzugsweise wird die Anzahl n der innerhalb einer Walzstraße aktivierten Dickenreduktionsschritte durch die Bedingung
Diese Verfahrensvorschrift ermöglicht somit bei einer bestehenden Gieß- und Walzanlage zum kontinuierlichen Gießen und austenitischen Walzen von Stahlband eine Bestimmung der zu aktivierenden optimalen Anzahl von Dikkenreduktionsschritten bzw. Walzgerüsten in jeder der Gießanlage nachgeordneten Walzstraßen aus der Menge der vorhandenen Walzgerüste.Thus, in an existing casting and rolling plant for continuous casting and austenitic rolling of steel strip, this method allows a determination of the optimum number of thickness reduction steps or rolling stands to be activated in each of the rolling mills downstream from the amount of existing rolling stands.
Von Dickenreduktionsschritt zu Dickenreduktionsschritt kommt es zu einer Abnahme der querschnittsgemittelten Vorbandtemperatur, wobei diese die stahlgüteabhängige Austenitbildungs-Grenztemperatur nicht unterschreiten darf. Damit die stahlgüteabhängige Austenitbildungs-Grenztemperatur auch im letzten Dickenreduktionsschritt einer Walzstraße nicht unterschritten wird, erfolgt nach der Durchführung von Dickenreduktionsschritten in einer Walzstraße und vor der Durchführung von Dickenreduktionsschritten in einer darauf folgenden Walzstraße eine Zwischenerwärmung des Walzbandes, wobei die querschnittsgemittelte Walzbandtemperatur um 50 K bis 450 K, vorzugsweise um 120 K bis 350 K, erhöht wird. Diese Zwischenerwärmung erfolgt vorzugsweise durch eine induktive Querfelderwärmung. Jedoch können, vor allem in Abhängigkeit der Zwischenbanddicke, auch andere bekannte Methoden für die Umsetzung der Zwischenerwärmung herangezogen werden.From thickness reduction step to thickness reduction step, there is a decrease in the cross-section-averaged pre-strip temperature, which must not be less than the austenite formation limit temperature dependent on steel content. In order to ensure that the steel-grade-dependent austenite formation limit temperature does not fall below even in the last thickness reduction step of a rolling train, after the reduction of thickness in a rolling train and before reduction of thickness in a subsequent rolling train, intermediate heating of the rolled strip takes place, whereby the cross-section averaged rolled strip temperature is 50 K to 450 K, preferably by 120 K to 350 K, is increased. This intermediate heating is preferably carried out by an inductive transverse field heating. However, other known methods for the implementation of the intermediate heating can be used, especially as a function of the intermediate strip thickness.
Vorzugsweise werden bei einer Gießdicke hBr < 45 mm alle Dickenreduktionsschritte in einer Walzstraße und bei einer Gießdicke hBr > 60 mm alle erforderlichen Dickenreduktionsschritte in zumindest zwei Walzstraßen durchgeführt. Im Gießdickenbereich zwischen 45 mm und 60 mm kann die Walzung in Abhängigkeit von verschiedenen Einflussfaktoren sowohl in einer Walzstraße als auch in zwei Walzstraßen erfolgen. Beispielsweise würde die Walzung bei der Grobblech-Erzeugung vorzugsweise in einer Walzstraße und bei einer Warmband-Erzeugung vorzugsweise in zwei Walzstraßen erfolgen.Preferably, with a casting thickness h Br <45 mm, all thickness reduction steps in a rolling train and at a casting thickness h Br > 60 mm, all required thickness reduction steps are carried out in at least two rolling mills. In the casting thickness range between 45 mm and 60 mm, rolling can be carried out in a rolling mill as well as in two rolling mills, depending on various influencing factors. For example, rolling in heavy plate production would preferably take place in one rolling line and preferably in two rolling lines during hot strip production.
Als zweckmäßig hat sich herausgestellt, dass bei einer Gießdicke hBr < 50 mm alle Dickenreduktionsschritte in einer einzigen Walzstraße ohne Zwischenerwärmung durchgeführt werden und bei einer Gießdicke hBr ≥ 50 mm die erforderlichen Dickenreduktionsschritte in zumindest zwei Walzstraßen durchgeführt werden.It has been found to be expedient that, with a casting thickness h Br <50 mm, all thickness reduction steps are carried out in a single rolling train without intermediate heating and at a casting thickness h Br ≥ 50 mm, the required thickness reduction steps are carried out in at least two rolling mills.
Bei Gießdicken unter 50 mm und bei Walzbandenddicken über 3,5 mm ist es zumeist ausreichend nach dem Gießprozess eine einzige Walzstraße mit maximal n Walzgerüsten entsprechend der Berechnungsvorschrift vorzusehen und im Anschluss daran das Band in einer Kühlstrecke abzukühlen, entsprechend dem vorgegebenen Bundgewicht querzuteilen und einem Aufwickelsystem zuzuführen. Eine zusätzliche deutliche Banderwärmung ist hierbei nicht notwendig.For casting thicknesses below 50 mm and Walzbandenddicken over 3.5 mm, it is usually sufficient to provide a single rolling mill with a maximum of n rolling stands according to the calculation rule after the casting process and then cooling the band in a cooling section, according to the predetermined bundle weight schrosszuteilen and a winding system supply. An additional significant band heating is not necessary here.
Bei einer Gießdicke des Vorbandes von 50 mm und mehr ergibt sich bei der Festlegung der Anzahl der notwendigen Dickenreduktionsschritte zur Erreichung der zu haspelnden Warmbanddicke meist, dass zumindest zwei Gruppen von Walzgerüsten anzuordnen sind, wobei die Anzahl der maximal notwendigen Walzgerüste für jede Gruppe die Bedingungen der Berechnungsvorschrift erfüllt, d.h. die errechnete Anzahl an Reduktionsschritten keinesfalls über-, sondern tendenziell unterschnitten werden sollten. Zwischen den beiden Gruppen von Walzgerüsten erfolgt eine Zwischenerwärmung des Vorbandes um mindestens 50 K auf eine deutlich über der Austenitbildungs-Grenztemperatur liegende Vorbandtemperatur. Jedenfalls ist für die angedachten breitenspezifischen Erzeugungsraten von 2,5 bis 4,5 t/min, bevorzugt, 3,0 bis 3,6 t/min, eine Aufteilung in zumindest zwei Gruppen von Walzgerüsten zweckmäßig, wenn die Endwalzdicke unter 3,5 mm liegt.In the case of a casting thickness of the preliminary strip of 50 mm and more, when determining the number of thickness reduction steps required to achieve the hot strip thickness to be coiled, it is usually the case that at least two groups of rolling stands are to be arranged, wherein the number of maximum necessary rolling stands for each group satisfies the conditions of Calculation rule fulfilled, ie The calculated number of reduction steps should by no means be overstated, but should tend to be undercut. Between the two groups of rolling stands, an intermediate heating of the pre-strip takes place by at least 50 K to a pre-strip temperature which is significantly higher than the austenite formation limit temperature. In any case, for the envisaged broad specific production rates of 2.5 to 4.5 t / min, preferably 3.0 to 3.6 t / min, a division into at least two groups of rolling stands is expedient if the final rolling thickness is less than 3.5 mm lies.
Das Verfahren ist vorteilhaft anwendbar, wenn das in einem kontinuierlichen Gießprozess hergestellte Vorband mit einer Gießdicke von mindetens 30 mm, vorzugsweise mit einer Gießdicke von mindestens 60 mm, hergestellt wird. Das Verfahren ist besonders günstig anwendbar, wenn bei Gießdicken von 30 bis 300 mm, vorzugsweise bei Gießdicken von 60 bis 150 mm, eine Walzenddicke von 0,5 bis 15 mm, vorzugsweise von 0,8 bis 12 mm und im besonderen 1,0 bis 8 mm, erreicht werden soll.The method can be used advantageously if the preliminary strip produced in a continuous casting process is produced with a casting thickness of at least 30 mm, preferably with a casting thickness of at least 60 mm. The method is particularly advantageously applicable if, for casting thicknesses of 30 to 300 mm, preferably at casting thicknesses of 60 to 150 mm, a final rolling thickness of 0.5 to 15 mm, preferably from 0.8 to 12 mm and in particular from 1.0 to 8 mm, to be achieved.
Zur Umsetzung des Verfahrens ist es zweckmäßig, dass die Berechnungsvorschrift zur Ermittlung der Anzahl von ni oder n unmittelbar aufeinander folgenden Dickenreduktionsschritten für jede Walzstraße auf Basis der Bedingung
Eine kombinierte Gieß- und Walzanlage zur Herstellung von austenitisch gewalztem Warmband in einem kontinuierlich fortlaufenden Gieß- und Walzprozess kann eine Stranggießanlage zum Gießen von Stahlsträngen mit einer Gießdicke von weniger als 300 mm, vorzugsweise zum Gießen von Stahlsträngen mit einer Gießdicke von weniger als 150 mm, und mindestens eine Walzstraße, die mehrere aufeinander folgende Walzgerüste umfasst, zur Erzeugung eines im austenitischen Temperaturbereich gewalzten Warmbandes mit einer Walzenddicke zwischen 0,5 und 15,0 mm und eine dem letzten Walzgerüst nachgeordneten Zerteilanlage und Bandspeichereinrichtung umfassen.A combined caster and mill for the production of austenitic rolled hot strip in a continuous continuous casting and rolling process may include a continuous caster for casting steel cords having a casting thickness of less than 300 mm, preferably for casting steel cords having a casting thickness of less than 150 mm. and at least one rolling mill comprising a plurality of successive rolling mills for producing a hot rolled strip rolled in the austenitic temperature range with a rolling thickness of between 0.5 and 15.0 mm and a cutting plant and strip storage device arranged downstream of the last rolling stand.
Bei der Auslegung der kombinierten Gieß- und Walzanlage ist ein in Zukunft zu erwartendes abnehmerbestimmtes und darauf abgestimmtes beabsichtigtes Produktionsprogramm für Warmband zugrunde zu legen. Ein wesentliches Ziel besteht darin, mit einer kompakten, ein breites Produktionsspektrum abdeckenden Gieß- und Walzanlage ein kontinuierliches ausschließlich austenitisches Walzen eines Warmbandes zu gewährleisten.The design of the combined casting and rolling plant is based on a future customer-oriented and coordinated intended production program for hot strip. An essential goal is to ensure a continuous exclusively austenitic rolling of a hot strip with a compact, wide production spectrum covering casting and rolling mill.
Jede der mindestens einen Walzstraße kann eine Anzahl von ni unmittelbar aufeinander folgenden Walzgerüsten umfassen, wobei die Anzahl der Walzgerüste ni durch die Bedingung
- T VB,i [°C] die querschnittsgemittelte Vorbandtemperatur am Ende der Gießmaschine (im Bereich der Sumpfspitze) bzw. am Ende einer vor der i-ten Walzstraße installierten Zwischenerwärmungseinrichtung,
- Taust [°C] die stahlgüteabhängige Austenitbildungs-Grenztemperatur (austenit. Endwalztemperatur),
- hBr [mm] die Brammen-/Gießdicke bei Durcherstarrung (= Sumpfspitze),
- dend,i [mm] die Banddicke nach den ni Walzgerüsten/Dickenreduktionsschritten, der i-ten Walzstraße,
- mvor die Anzahl aller ab der Brammendurcherstarrung aktivierten Walzgerüste / erfolgten Dickenreduktionsschritte bis zum Einlauf in das erste Gerüst der nachfolgenden i-ten Walzstraße,
- T VB , i [° C] is the cross-sectional average pre-strip temperature at the end of the casting machine (in the area of the sump tip) or at the end of an intermediate heating device installed in front of the i-th rolling line,
- T aust [° C] the steel grade dependent austenite formation limit temperature (austenite finish rolling temperature),
- h Br [mm] the slab / casting thickness when solidified (= sump tip),
- dend, i [mm] is the strip thickness after the n i roll stands / thickness reduction steps, the ith rolling mill,
- m in front of the number of all rolling stands activated from slab solidification / thickness reduction steps up to the entry into the first stand of the following i-th rolling train,
Vorzugsweise ist die Anzahl n der innerhalb einer Walzstraße installierten Walzgerüste durch die Bedingung
Zur Sicherstellung einer austenitischen Walzung im letzten Walzgerüst jeder der gegebenenfalls aufeinander folgenden Walzstraßen ist jeweils zwischen zwei aufeinander folgenden Walzstraße Wi-1 und Wi eine Zwischenerwärmungseinrichtung zur Anhebung der querschnittsgemittelten Vorbandtemperatur auf TVB,i auf ein entsprechend ausreichendes Temperaturniveau angeordnet. Um eine möglichst gleichmäßige Anhebung der querschnittsgemittelten Vorbandtemperatur zu erreichen ist dieZwischenerwärmungseinrichtung als Einrichtung zur induktiven Querfelderwärmung ausgebildet.To ensure austenitic rolling in the last roll stand of each of the optionally successive rolling mills, an intermediate heating device for raising the cross-section-averaged pre-strip temperature to T VB, i to a correspondingly sufficient temperature level is arranged between each successive rolling train W i-1 and W i . In order to achieve the most uniform possible increase in the cross-section-averaged pre-strip temperature, the intermediate heating device is designed as a device for inductive transverse field heating.
Die der kombinierten Gieß- und Walzanlage zugrundeliegende Gießanlage umfasst eine auf unterschiedliche Gießdickeneinstellbare Durchlaufkokille oder auswechselbare Durchlaufkokillen und eine nachgeordnete Strangführung mit spaltverstellbaren Strangsegmenten. Zweckmäßig ist im Fall einer auf eine Gießdicke hBr < 45 mm eingestellten Durchlaufkokille und Strangführung genau eine Walzstraße mit n Walzgerüsten aktiviert und im Fall einer auf eine Gießdicke hBr > 60 mm eingestellten Durchlaufkokille und Strangführung sind mindestens zwei Walzstraßen mit jeweils einer bestimmten Anzahl von Walzgerüsten aktiviert. Im Gießdickenbereich zwischen 45 mm und 60 mm kann die Walzung in Abhängigkeit von verschiedenen Einflussfaktoren sowohl in einer Walzstraße als auch in zwei Walzstraßen erfolgen, wobei zwischen den aufeinander folgenden Walzstraßen eine Zwischenerwärmungseinrichtung vorgesehen ist.The casting plant on which the combined casting and rolling plant is based comprises a continuous casting mold that can be set to different casting thicknesses or interchangeable continuous casting molds and a downstream strand guide with gap-adjustable strand segments. In the case of a continuous casting mold and strand guide set to a casting thickness h Br <45 mm, it is expedient to activate exactly one rolling mill with n rolling stands and in the case of a continuous casting mold and strand guide set to a casting thickness hBr> 60 mm at least two rolling mills each having a specific number of rolling stands activated. In the casting thickness range between 45 mm and 60 mm, the rolling may be carried out in a rolling mill as well as in two rolling mills, depending on various influencing factors, with an intermediate heating device between the successive rolling mills.
Nach einer weiteren möglichen Ausgestaltung ist es vorteilhaft, dass im Fall einer auf eine Gießdicke hBr ≤ 50 mm eingestellten Durchlaufkokille und Strangführung genau eine Walzstraße mit n Walzgerüsten aktiviert ist und andernfalls mindestens zwei Walzstraßen, mit jeweils einer bestimmten Anzahl von Walzgerüsten, aktiviert sind.According to a further possible embodiment it is advantageous that in the case of a cast thickness h Br ≤ 50 mm set-ended mold and strand guide precisely a rolling mill with n roll stands is activated, and otherwise, at least two rolling trains, each having a certain number of roll stands, are enabled.
In Abhängigkeit von insbesondere der in den einzelnen Walzgerüsten der Walzstraßen angestrebten Dickenreduktion und des thermischen oder thermodynamischen Zustands des Vorbandes bzw. Zwischenbandes, ist es zweckmäßig, wenn der Arbeitswalzendurchmesser der Arbeitswalzen in der ersten Walzstraße nach der Gießanlage in einem Durchmesserbereich von 650 mm bis 980 mm liegt, um größtmögliche Dickenreduktionen bei sehr hohen Brammen- bzw. Vorbandtemperaturen zu erreichen. Ein bevorzugter Bereich der Arbeitswalzendurchmesser liegt zwischen 650 mm und 800 mm. Der Arbeitswalzendurchmesser der Arbeitswalzen in der zweiten Walzstraße nach der Gießanlage liegt in einem Durchmesserbereich von 500 mm bis 870 mm, da die Zwischenbanddicke bereits geringer ist. Ein bevorzugter Bereich der Arbeitswalzendurchmesser liegt für diesen Fall zwischen 500 mm und 720 mm. Generell gilt, dass die Arbeitswalzendurchmesser abnehmen sollen, wenn die Einlaufdicke des Walzgutes geringer ist.Depending on, in particular, the reduction in thickness envisaged in the individual rolling mills of the rolling mills and the thermal or thermodynamic state of the pre-strip or intermediate strip, it is expedient for the work-roll diameter of the work rolls in the first rolling line after the casting plant to have a diameter range of 650 mm to 980 mm is to achieve the greatest possible thickness reductions at very high slab temperatures or pre-strip temperatures. A preferred range of working roll diameters is between 650 mm and 800 mm. The working roll diameter of the work rolls in the second rolling line after the caster is in a diameter range of 500 mm to 870 mm, since the intermediate strip thickness is already lower. A preferred range of working roll diameters for this case is between 500 mm and 720 mm. In general, the working roll diameter should decrease when the inlet thickness of the rolling stock is lower.
Weitere Vorteile und Merkmale der vorliegenden Erfindung ergeben sich aus der nachfolgenden Beschreibung nicht einschränkender Ausführungsbeispiele, wobei auf die beiliegenden Figuren Bezug genommen wird, die folgendes zeigen:
- Fig. 1
- einen Längsschnitt einer kombinierten Gieß- und Walzanlage nach einer ersten Ausführungsform der Erfindung,
- Fig. 2
- einen Längsschnitt einer kombinierten Gieß- und Walzanlage nach einer zweiten Ausführungsform der Erfindung,
- Fig. 3
- einen Längsschnitt einer kombinierten Gieß- und Walzanlage nach einer dritten Ausführungsform der Erfindung
- Fig. 4
- Regelschema für die Steuerung der kombinierten Gieß- und Walzanlage.
- Fig. 1
- a longitudinal section of a combined casting and rolling plant according to a first embodiment of the invention,
- Fig. 2
- a longitudinal section of a combined casting and rolling plant according to a second embodiment of the invention,
- Fig. 3
- a longitudinal section of a combined casting and rolling mill according to a third embodiment of the invention
- Fig. 4
- Control scheme for the control of the combined casting and rolling plant.
In den
Die Anzahl der Walzgerüste ergibt sich hierbei durch die größte natürliche Zahl im Feld der möglichen Ergebniswerte.The number of rolling stands results from the largest natural number in the field of possible result values.
Anschließend durchläuft das warmgewalzte Band eine Kühlstrecke 9, wird entsprechend vorbestimmter Bundgewichte mit einer von einer Querteilschere gebildeten Zerteilanlage 10 quergeteilt und in einer Bandhaspeleinrichtung 11 zu Bunden gewickelt.Subsequently, the hot-rolled strip passes through a
Die in der Stranggießanlage festgelegte Ausgangs-Strangdicke und die angestrebte Walzenddicke des zu einem Bund gewickelten Warmbandes bestimmen neben der Stahlqualität ganz wesentlich die Anzahl der notwendigen Walzgerüste / Dickenreduktionsschritte, um ein Endprodukt mit den geforderten Material- und Gefügeeigenschaften zu erzielen. Die querschnittsgemittelte Vorbandtemperatur TVB,1 am Ende der Gießmaschine und somit vor Eintritt in das erste Walzgerüst ist nur in sehr engen Grenzen variabel und hängt von den Betriebsbedingungen der Stranggießmaschine ab. Die stahlgüteabhängige Austenitbildungs-Grenztemperatur ist eine Materialkonstante, die für jede Stahlqualität im Wesentlichen festliegt. Während des Walzvorganges wird einerseits Verformungsenergie in Form von Wärme freigesetzt, andererseits gibt der Vorstreifen auf seinem Weg durch die Walzgerüste Wärme an die Umgebung ab. In Summe nimmt die Vorbandtemperatur üblicherweise kontinuierlich ab und dies umso stärker je niedriger die Walzgeschwindigkeit, bzw. eingangsseitig die Gießgeschwindigkeit ist. Die oben angeführte, entwickelte Formel liefert die Festlegung der max. sinnvollen Anzahl der Walzgerüste bzw. Dickenreduktionsschritte, die in einer Walzstraße vorgenommen werden sollen, wobei die Bandtemperatur die Austenitbildungs-Grenztemperatur in der Walzstraße nicht unterschreitet, unter Berücksichtigung aller Vorverformungsschritte. Wenn mit Brammendicken > 50 mm Walzendicken < 3,5 mm angestrebt werden, ist die Anordnung zweier oder mehrerer Walzstraßen W1, W2, W3 notwendig, wie in den Ausführungsbeispielen gemäß
Die kombinierte Gieß- und Walzanlage in der Ausführungsform gemäß
Die Walzstraße W1 umfasst eine bestimmte Maximal-Anzahl von Walzgerüsten 8a, 8b, ..., 8n, die mit der oben angegebenen Berechnungsvorschrift zu ermitteln ist. Gleichermaßen weist die Walzstraße W2 eine bestimmte Maximal-Anzahl von Walzgerüsten 13a, 13b, ..., 13m auf, die ebenfalls mit der oben angegebenen Berechnungsvorschrift zu ermitteln ist, wobei für W2 die Anzahl der in der Walzstraße W1 bereits vorgenommenen Dickenreduktionsschritte in der Berechnungsvorschrift durch den Exponenten mvor zu berücksichtigen ist. In der Zwischenerwärmungsvorrichtung 12 wird die querschnittsgemittelte Vorbandtemperatur wieder auf ein ausreichend hohes Temperaturniveau über der Austenitbildungs-Grenztemperatur des in der Walzstraße W1 dickenreduzierten Vorstreifens gebracht, um die in der Walzstraße W2 vorzunehmenden Walzstiche im austenitischen Bereich durchführen zu können. Die mit der Zwischenerwärmungseinrichtung erzielte Temperaturerhöhung liegt bedarfabhängig im Bereich von 50 K bis zu 450 K, vorzugsweise im Bereich von 120 K bis 350 K.The rolling train W1 comprises a certain maximum number of rolling stands 8a, 8b,..., 8n, which is to be determined with the calculation rule given above. Similarly, the rolling train W2 has a certain maximum number of rolling stands 13a, 13b, ..., 13m, which is also to be determined with the above-mentioned calculation rule, wherein for W 2, the number of already in the rolling mill W1 made thickness reduction steps in the Calculation rule by the exponent m before to take into account. In the
Die in
In der betrieblichen Praxis ist es notwendig, Warmband in verschiedenen Stahlqualitäten und mit sehr unterschiedlichen Walzenddicken ausgehend von Stahlsträngen mit unterschiedlichen Gießdicken zu produzieren. Eine vielschichtige Produktpalette kann auf einer kombinierten Gieß- und Walzanlage der erfindungsgemäßen Art sehr leicht produziert werden, wenn bereits in der konzeptionellen Phase der Anlagenerstellung eine auf diese Produktpalette abgestimmte Anordnung der Walzstraßen erfolgt ist. Dadurch ist eine produktspezifische Aktivierung benötigter Walzgerüste möglich. Daher wird die Anlage üblicherweise tatsächlich die jeweilige Maximalanzahl an Gerüsten in jeder Walzstraße, in Abhängigkeit von max. Brammendicke, minimaler Bandaufwickeldicke, den jeweiligen Zwischenbanddicken dend,i und den Zwischenerwärmungstemperaturen TVB,i gemäß der entwickelten Formel sowie Zwischenerwärmungseinrichtungen enthalten. Darüber hinaus können betriebsbedingte Temperaturschwankungen bei der Herstellung des Vorstreifens in der Stranggießanlage durch entsprechende Steuerung der Walzstraßen insbesondere, durch Aktivierung einer optimalen Walzgerüstkonfiguration, erreicht werden. Dies kann auf der Prozessleitebene P erfolgen, die entsprechende Zustandsinformationen von einem Prozessrechner PS der vorgelagerten Stranggießanlage erhält und Aktivierungssignale an die Einzelregelkreise PW1 und PW2 der Walzstraßen W1 und W2 übermittelt (
Die Zwischenerwärmungseinrichtung 12 ist auf der Prozessleitebene P in den Regelkreis eingebunden.The
Claims (9)
- Method for the continuous austenitic rolling of a preliminary strip, which is produced in a continuous casting process in a continuous casting facility with a casting thickness of less than 300 mm, preferably with a casting thickness of less than 150 mm, by performing thickness reduction steps in at least one rolling train - formed by a plurality of successive rolling stands - to form a hot strip having a final rolling thickness of between 0.5 and 15 mm and subsequent transverse separation of the rolled hot strip into coil sizes or coil lengths before winding in a storage device, characterized in that the preliminary strip (6) is reduced in thickness in each of the rolling trains (W, W1, W2, W3) downstream of the continuous casting facility by a number (n, n1, ni) of thickness reduction steps, the number ni of thickness reduction steps to be carried out being determined by the conditionTVB,i [ºC] is the cross-sectionally averaged preliminary strip temperature at the end of the casting machine (in the region of the liquidus tip) or at the end of an intermediate heating device installed before the ith rolling train,Taust [ºC] is the steel quality-dependent austenite formation limit temperature (austenitic final rolling temperature),hBr [mm] is the slab/casting thickness at solidification (=liquidus tip),dend,i [mm] is the strip thickness after the ni thickness reduction steps of the ith rolling train,mvor is the number of all thickness reduction steps carried out from the slab solidification until entry into the first stand of the subsequent ith rolling train,vg [m/min] is the slab casting speed.
- Method according to Claim 1 or 2, characterized in that intermediate heating of the rolling strip is performed after carrying out thickness reduction steps in a rolling train (W1 or W2) and before carrying out thickness reduction steps in a subsequent rolling train (W2 or W3), the cross-sectionally averaged rolling strip temperature being increased by from 50 K to 450 K, preferably by from 120 to 350 K.
- Method according to Claim 3, characterized in that the intermediate heating is carried out by inductive transverse field heating.
- Method according to one of the preceding Claims 1 to 4, characterized in that for a casting thickness hBr < 45 mm all the thickness reduction steps are carried out in one rolling train, and for a casting thickness hBr > 60 mm all necessary thickness reduction steps are carried out in at least two rolling trains.
- Method according to one of the preceding claims, characterized in that for a casting thickness hBr < 50 mm all the thickness reduction steps are carried out in one rolling train, otherwise the necessary thickness reduction steps are preferably carried out in at least two rolling trains.
- Method according to one of the preceding claims, characterized in that the rolling thickness of the hot strip lies between 0.8 and 12 mm, preferably between 1.0 mm and 8 mm.
- Method according to one of the preceding claims, characterized in that the preliminary strip produced in a continuous casting process is produced with a casting thickness of at least 30 mm, preferably with a casting thickness of at least 60 mm.
- Method according to one of the preceding claims, characterized in that a calculation rule for determining the number ni or n of immediately successive thickness reduction steps for each rolling train is assigned on the basis of the condition
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0189307A AT506065B1 (en) | 2007-11-22 | 2007-11-22 | METHOD FOR THE CONTINUOUS AUSTENITIC ROLLING OF A PRECONDUCT MADE IN A CONTINUOUS PLANTING PROCESS, AND A COMBINED CASTING AND ROLLING MACHINE TO PERFORM THE METHOD |
PCT/EP2008/065787 WO2009065840A1 (en) | 2007-11-22 | 2008-11-19 | Method for continuous austenitic rolling of a preliminary strip, which is produced in a continuous casting process, and combined casting and rolling facility for performing the method |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2209573A1 EP2209573A1 (en) | 2010-07-28 |
EP2209573B1 EP2209573B1 (en) | 2013-08-14 |
EP2209573B2 true EP2209573B2 (en) | 2018-01-17 |
Family
ID=40380725
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08852273.5A Active EP2209573B2 (en) | 2007-11-22 | 2008-11-19 | Method for continuous austenitic rolling of a preliminary strip, which is produced in a continuous casting process |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP2209573B2 (en) |
KR (1) | KR101514625B1 (en) |
CN (1) | CN101868313B (en) |
AT (1) | AT506065B1 (en) |
BR (1) | BRPI0819789A8 (en) |
ES (1) | ES2428761T3 (en) |
RU (1) | RU2463127C2 (en) |
UA (1) | UA101338C2 (en) |
WO (1) | WO2009065840A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1400002B1 (en) | 2010-05-10 | 2013-05-09 | Danieli Off Mecc | PROCEDURE AND PLANT FOR THE PRODUCTION OF FLAT LAMINATED PRODUCTS |
CO6310134A1 (en) | 2010-08-31 | 2011-08-22 | Pacific Rubiales Energy Corp | SYNCHRONIZED CRUDE PRODUCTION SYSTEM BY COMBUSTION IN SITU |
AT511657B1 (en) * | 2011-06-24 | 2013-04-15 | Siemens Vai Metals Tech Gmbh | COMMISSIONING OF A FINISHED ROLLING CABLE IN A GIESS-WALZ-VERBUNDANLAGE |
JP6684968B2 (en) * | 2016-11-10 | 2020-04-22 | エス・エム・エス・グループ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング | Method for producing metallic strip in a continuous casting and rolling plant |
EP3338914A1 (en) * | 2016-12-22 | 2018-06-27 | Primetals Technologies Austria GmbH | Method for the endless manufacture of a coiled hot rolled sheet in a combined casting and rolling installation, method for starting up a combined casting and rolling installation, and a combined casting and rolling installation |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL8702050A (en) * | 1987-09-01 | 1989-04-03 | Hoogovens Groep Bv | METHOD AND APPARATUS FOR THE MANUFACTURE OF TIRE-DEFORMING STEEL WITH GOOD MECHANICAL AND SURFACE PROPERTIES. |
IT1224318B (en) * | 1988-05-26 | 1990-10-04 | Mannesmann Ag | PROCESS AND PLANT FOR THE CONTINUOUS PRODUCTION OF STEEL BELT |
IT1244295B (en) | 1990-07-09 | 1994-07-08 | Giovanni Arvedi | PROCESS AND PLANT FOR THE OBTAINING OF WRAPPED STEEL BELTS, WITH CHARACTERISTICS OF COLD ROLLED PRODUCTS OBTAINED DIRECTLY IN HOT ROLLING LINE |
US5133205A (en) * | 1990-11-13 | 1992-07-28 | Mannesmann Aktiengesellschaft | System and process for forming thin flat hot rolled steel strip |
AT398396B (en) * | 1993-02-16 | 1994-11-25 | Voest Alpine Ind Anlagen | METHOD FOR PRODUCING A TAPE, PRE-STRIP OR A LAM |
TW297788B (en) * | 1994-12-15 | 1997-02-11 | Sumitomo Metal Ind | |
DE19613718C1 (en) * | 1996-03-28 | 1997-10-23 | Mannesmann Ag | Process and plant for the production of hot-rolled steel strip |
NL1003293C2 (en) * | 1996-06-07 | 1997-12-10 | Hoogovens Staal Bv | Method and device for manufacturing a steel strip. |
DE19632448A1 (en) * | 1996-08-05 | 1998-02-12 | Mannesmann Ag | Process and plant for producing strip from low-carbon and ultra-low-carbon steels |
DE19758108C1 (en) * | 1997-12-17 | 1999-01-14 | Mannesmann Ag | Method and installation for continuous production of hot rolled thin flat products |
DE10038292A1 (en) * | 2000-08-05 | 2002-02-14 | Sms Demag Ag | Production of continuously cast slabs comprises using a device having a blooming train, a roller table, a roller table section, a leveling unit, an inductive heating device, a finishing train, a delivery roller table and coiling machines |
DE10203711A1 (en) * | 2002-01-31 | 2003-08-14 | Sms Demag Ag | Process and plant for the production of hot strip from austenitic stainless steels |
ITMI20021996A1 (en) * | 2002-09-19 | 2004-03-20 | Giovanni Arvedi | PROCESS AND PRODUCTION LINE FOR THE MANUFACTURE OF ULTRA-THIN HOT TAPE BASED ON THE TECHNOLOGY OF THE THIN SHEET |
MX2007012433A (en) * | 2005-04-07 | 2007-11-09 | Giovanni Arvedi | Process and system for manufacturing metal strips and sheets without solution of continuity between continuous casting and rolling. |
ITRM20050523A1 (en) * | 2005-10-21 | 2007-04-22 | Danieli Off Mecc | PROCESS AND PLANT FOR THE PRODUCTION OF METAL TAPES. |
-
2007
- 2007-11-22 AT AT0189307A patent/AT506065B1/en not_active IP Right Cessation
-
2008
- 2008-11-19 ES ES08852273T patent/ES2428761T3/en active Active
- 2008-11-19 WO PCT/EP2008/065787 patent/WO2009065840A1/en active Application Filing
- 2008-11-19 CN CN2008801172953A patent/CN101868313B/en active Active
- 2008-11-19 BR BRPI0819789A patent/BRPI0819789A8/en active Search and Examination
- 2008-11-19 EP EP08852273.5A patent/EP2209573B2/en active Active
- 2008-11-19 RU RU2010125493/02A patent/RU2463127C2/en active
- 2008-11-19 KR KR1020107013861A patent/KR101514625B1/en active IP Right Grant
- 2008-11-19 UA UAA201006221A patent/UA101338C2/en unknown
Also Published As
Publication number | Publication date |
---|---|
BRPI0819789A2 (en) | 2015-05-05 |
UA101338C2 (en) | 2013-03-25 |
ES2428761T3 (en) | 2013-11-11 |
EP2209573B1 (en) | 2013-08-14 |
WO2009065840A1 (en) | 2009-05-28 |
RU2010125493A (en) | 2011-12-27 |
RU2463127C2 (en) | 2012-10-10 |
CN101868313A (en) | 2010-10-20 |
AT506065A4 (en) | 2009-06-15 |
AT506065B1 (en) | 2009-06-15 |
CN101868313B (en) | 2013-12-04 |
KR101514625B1 (en) | 2015-04-23 |
BRPI0819789A8 (en) | 2015-05-05 |
EP2209573A1 (en) | 2010-07-28 |
KR20100099202A (en) | 2010-09-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE4402402B4 (en) | Process for producing hot-rolled steel strip from continuously cast starting material and plant for carrying out the process | |
EP0415987B1 (en) | Process for continuous production of steel strip or steel sheet from flat products made by the circular-arc type continuous casting process | |
EP1951451B1 (en) | Method for producing a hot-rolled steel strip and combined casting and rolling installation for carrying out the method | |
EP0611610B1 (en) | Process for the production of a strip, a pre-strip or a slab | |
EP0889762B1 (en) | Method for producing hot-rolled steel strip | |
EP0804300B1 (en) | Process and device for producing a steel strip with the properties of a cold-rolled product | |
DE202011110779U1 (en) | Plant for the production of flat rolled products | |
DE19540978A1 (en) | Production plant for the continuous or discontinuous rolling out of hot strip | |
EP2209573B2 (en) | Method for continuous austenitic rolling of a preliminary strip, which is produced in a continuous casting process | |
EP3341142B1 (en) | Method for operating an installation based on the csp concept | |
DE19520832A1 (en) | Method and device for producing steel strip with cold rolling properties | |
WO1990000456A1 (en) | Process for manufacturing steel strip with a thickness of less than 10 mm | |
EP3797006B1 (en) | Casting-rolling system for batch and continuous operation | |
EP0761325B1 (en) | Method and installation for production of ferritic hot-rolled strip | |
DE19632448A1 (en) | Process and plant for producing strip from low-carbon and ultra-low-carbon steels | |
AT511657A1 (en) | COMMISSIONING OF A FINISHED ROLLING CABLE IN A GIESS-WALZ-VERBUNDANLAGE | |
WO2015014864A1 (en) | Casting and rolling plant and method for producing slabs | |
EP1059125A2 (en) | Method for the manufacture of metal strip | |
DE10025080A1 (en) | Method of making metal tape |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20100504 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL BA MK RS |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: SIEMENS VAI METALS TECHNOLOGIES GMBH |
|
DAX | Request for extension of the european patent (deleted) | ||
17Q | First examination report despatched |
Effective date: 20111019 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R079 Ref document number: 502008010498 Country of ref document: DE Free format text: PREVIOUS MAIN CLASS: B22D0011120000 Ipc: B21B0037000000 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: B21B 37/00 20060101AFI20130212BHEP Ipc: B21B 1/46 20060101ALI20130212BHEP Ipc: B22D 11/12 20060101ALI20130212BHEP |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: REF Ref document number: 626486 Country of ref document: AT Kind code of ref document: T Effective date: 20130815 Ref country code: CH Ref legal event code: EP |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D Free format text: LANGUAGE OF EP DOCUMENT: GERMAN |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 502008010498 Country of ref document: DE Effective date: 20131010 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2428761 Country of ref document: ES Kind code of ref document: T3 Effective date: 20131111 |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: VDEP Effective date: 20130814 |
|
REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG4D |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20131216 Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130904 Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130814 Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20131214 Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130814 Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130814 Ref country code: NO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20131114 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130814 Ref country code: LV Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130814 Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130814 Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130814 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20131115 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130814 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130814 Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130814 Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130814 Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130814 Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130814 Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130814 |
|
PLBI | Opposition filed |
Free format text: ORIGINAL CODE: 0009260 |
|
BERE | Be: lapsed |
Owner name: SIEMENS VAI METALS TECHNOLOGIES GMBH Effective date: 20131130 |
|
26 | Opposition filed |
Opponent name: SMS SIEMAG AG Effective date: 20140514 |
|
PLAX | Notice of opposition and request to file observation + time limit sent |
Free format text: ORIGINAL CODE: EPIDOSNOBS2 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20131119 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R026 Ref document number: 502008010498 Country of ref document: DE Effective date: 20140514 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20131130 Ref country code: MC Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130814 Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20131130 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20140731 |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: MM4A |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20131130 |
|
PLBB | Reply of patent proprietor to notice(s) of opposition received |
Free format text: ORIGINAL CODE: EPIDOSNOBS3 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20131119 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20131119 Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20131202 |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: MM01 Ref document number: 626486 Country of ref document: AT Kind code of ref document: T Effective date: 20131119 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20131119 |
|
RAP2 | Party data changed (patent owner data changed or rights of a patent transferred) |
Owner name: PRIMETALS TECHNOLOGIES AUSTRIA GMBH |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20131119 Ref country code: HU Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO Effective date: 20081119 Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130814 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20130814 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: TR Payment date: 20151027 Year of fee payment: 8 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20151111 Year of fee payment: 8 |
|
PLAB | Opposition data, opponent's data or that of the opponent's representative modified |
Free format text: ORIGINAL CODE: 0009299OPPO |
|
R26 | Opposition filed (corrected) |
Opponent name: SMS GROUP GMBH Effective date: 20140514 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R082 Ref document number: 502008010498 Country of ref document: DE Representative=s name: KINNSTAETTER, KLAUS, DIPL.-PHYS.UNIV., DE |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R082 Ref document number: 502008010498 Country of ref document: DE Representative=s name: KINNSTAETTER, KLAUS, DIPL.-PHYS.UNIV., DE Ref country code: DE Ref legal event code: R081 Ref document number: 502008010498 Country of ref document: DE Owner name: PRIMETALS TECHNOLOGIES AUSTRIA GMBH, AT Free format text: FORMER OWNER: SIEMENS VAI METALS TECHNOLOGIES GMBH, LINZ, AT |
|
PUAH | Patent maintained in amended form |
Free format text: ORIGINAL CODE: 0009272 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: PATENT MAINTAINED AS AMENDED |
|
27A | Patent maintained in amended form |
Effective date: 20180117 |
|
AK | Designated contracting states |
Kind code of ref document: B2 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R102 Ref document number: 502008010498 Country of ref document: DE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20161120 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180117 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20200420 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20161120 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20201124 Year of fee payment: 13 Ref country code: DE Payment date: 20201119 Year of fee payment: 13 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 502008010498 Country of ref document: DE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20220601 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20211119 |