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US20080135203A1 - Continuous Casting and Rolling Installation For Producing a Steel Strip - Google Patents

Continuous Casting and Rolling Installation For Producing a Steel Strip Download PDF

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Publication number
US20080135203A1
US20080135203A1 US10/548,551 US54855104A US2008135203A1 US 20080135203 A1 US20080135203 A1 US 20080135203A1 US 54855104 A US54855104 A US 54855104A US 2008135203 A1 US2008135203 A1 US 2008135203A1
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United States
Prior art keywords
steel strip
steel
continuous casting
rolling
installation according
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.)
Abandoned
Application number
US10/548,551
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English (en)
Inventor
Rudiger Doll
Klaus Pronold
Albrecht Sieber
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
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Siemens AG
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Filing date
Publication date
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Assigned to SIEMENS AKTIENGESSELLSCHAFT reassignment SIEMENS AKTIENGESSELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SIEBER, ALBRECHT, PRONOLD, KLAUS, DOLI, RUDIGER
Publication of US20080135203A1 publication Critical patent/US20080135203A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—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
    • 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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • 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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0608—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by caterpillars
    • 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
    • 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
    • B22D11/16—Controlling or regulating processes or operations
    • 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
    • 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
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B2015/0057—Coiling the rolled product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/14—Soft reduction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/18—Vertical rolling pass lines
    • 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
    • B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
    • 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

Definitions

  • the present invention relates to a continuous casting and rolling installation for producing a steel strip, comprising a liquid steel storage device, a liquid steel charging device, a vertically operating casting device with a revolving mold, a diverting device for diverting the cast steel strip into a horizontal position, a horizontally operating rolling mill and a winding device, all components being guided and/or controlled via individual technological control loops, the continuous casting and rolling installation comprising, in order to adjust the technological control loops in an integrated manner, a control system which connects the liquid steel storage device, the liquid steel charging device, the casting device, the diverting device, the rolling mill and the winding device with regard to control, operates on the basis of mathematical models and coordinates the individual installation parts with regard to the interaction thereof, while taking into consideration the effects of the control steps of an installation part upon installation parts following in the direction of mass flow.
  • the object of the present invention is to further develop a continuous casting and rolling installation of the type specified in the introduction such that qualitatively high-grade steel strips can be produced with it in a simple manner.
  • the invention is therefore based on the creation of a control system covering all installation parts, which extends from storage of the liquid steel to winding and which takes into consideration the fact that the characteristics of a steel or of a steel strip depend not only on its chemical composition and its mechanical treatment, but also on the thermal history. If the steel strip cast by means of the mold has a casting thickness of between 40 and 100 mm upon exit from the mold, the steel strip already has a reduced casting thickness compared with conventional continuous casting installations, so that less forming work has to be done in order to produce the finished product, i.e. the rolled steel strip.
  • the steel strip can be reduced in the reduction device to a rolling mill input thickness of between 10 and 40 mm, in particular between 15 and 35 mm, a significant reduction in strip thickness will already have been made even before the actual rolling. Since this reduction takes place at high temperatures, possibly even before complete solidification of the steel strip, only a limited amount of re-forming work is likewise required for this reduction. This applies most particularly if the steel strip can be reduced in the reduction device by at least 25% in relation to the casting thickness.
  • the reduction device preferably comprises an upper part in which the steel strip is re-formed and a lower part in which the steel strip retains its form.
  • the continuous casting and rolling installation can be guided by the control system such that the steel strip does not solidify completely until it is in the reduction device, only a particularly limited amount of re-forming work has to be performed in order to re-form the steel strip in the reduction device. This applies most particularly if the steel strip does not solidify completely until it is in the lower part, in which it retains its form.
  • the rolling mill can either be just a hot rolling mill or be a hot rolling mill with a cold rolling mill arranged downstream.
  • the steel strip will have a final thickness of between 1.0 and 6.0 mm at which it is wound up by the winding device, in the other case, the final thickness will lie between 0.3 and 2.0 mm.
  • the steel strip is reduced in the reduction device to a rolling mill input thickness which is determined according to the final thickness, the scope of reduction in the reduction device will already have been determined such that subsequent installation parts can be operated efficiently taking into account technologically advantageous boundary conditions.
  • cooling section or stretch is arranged between the rolling mill and the winding device, if the cooling section or stretch is also guided by a technological control loop and if this control loop is also guided by the control system, an even more comprehensive installation will emerge, in which the cooling section or stretch is integrated under the overall guidance of the control system.
  • upstream of the rolling mill there is preferably arranged a descaler which is also guided by a technological control loop, this control loop also being guided by the control system.
  • end-to-end processing of the steel strip is carried out by means of the continuous casting and rolling installation according to the invention.
  • the steel strip is thus immediately rolled and wound, directly after casting, reducing and diverting.
  • an intermediate winder and an equalizing furnace may be arranged between the diverting device and the rolling mill, these installation parts also being guided by a technological control loop and this control loop in turn being guided by the control system.
  • the control system preferably contains a material model by means of which a thermal behavior of the steel or steel strip from the steel storage device to the winding device can be modeled using path tracking, the technological control loops being guided at the correct times in accordance with the modeled thermal behavior of the steel or steel strip, as the characteristics of a steel or a steel strip depend not only on its chemical composition and its mechanical treatment but also on the thermal history.
  • phase changes in the steel or steel strip e.g. from liquid to solid or from austenite to ferrite
  • phase changes in the steel or steel strip e.g. from liquid to solid or from austenite to ferrite
  • structural characteristics of the steel strip e.g. from structural characteristics of the steel strip to be modeled within the framework of the material model.
  • the material model works particularly well.
  • downstream of the mold downstream of the reduction device, within the rolling mill and/or downstream of the rolling mill, possibly also within and/or downstream of the cooling section or stretch an actual temperature of the steel strip is recorded and used for adapting the material model, a (gradual) adaptation of the model to reality results.
  • the individual installation parts usually comprise locally active devices for influencing the temperature of the steel or steel strip.
  • these devices are regulated via the technological control loops assigned to the individual installation parts in accordance with guidance by the control system.
  • Possible locally active devices for influencing temperature are, in particular, cooling devices, e.g. with water, and (inductive) heating devices.
  • the control system preferably determines (in addition) at least one reference variable for influencing, in a manner effective across all installation parts, the temperature of the steel or steel strip and guides the installation parts concerned according to this reference variable.
  • the mass flow in particular, can be used as a reference variable active across all the installation parts, for a change in the mass flow, in particular, influences all the component parts which are arranged in direct succession and in which the steel strip is continuously processed. Where there is a change in the mass flow, all subsequent locally active devices have therefore to be guided in an appropriately adapted manner in order to ensure that the thermal behavior of the steel strip remains unchanged.
  • FIG. 1 shows a schematic representation of a continuous casting and rolling installation
  • FIG. 2 shows a schematic representation of a section taken from FIG. 1 .
  • FIG. 3 shows a schematic representation of a control system with underlying technological control loops for a continuous casting and rolling installation.
  • a continuous casting and rolling installation for producing a steel strip 1 comprises firstly a liquid steel storage device 2 .
  • This device 2 is usually designed as a so-called tundish.
  • Liquid steel passes from the tundish 2 via a liquid steel charging device 3 , indicated only schematically, (e.g. a liftable plug) and an immersion tube 4 into a casting device 5 .
  • the casting level is precisely controlled in a known manner to an accuracy of a few mm, e.g. ⁇ 3 mm.
  • the casting device 5 in the present case is fashioned as a vertically operating casting device 5 . It comprises a plurality of plates 6 which are connected to one another to form a continuous chain and revolve with the cast steel strip 1 . The plates 6 thus together form a revolving mold 6 . The steel strip 1 flows out of the mold 6 with a casting thickness d 1 and a strip width b.
  • the reduction device 7 comprises a plurality of roll pairs 8 , by means of which the steel strip 1 is guided and reduced to a rolling mill input thickness d 2 .
  • a diverting device 9 Arranged downstream of the reduction device 7 is a diverting device 9 . This diverts the steel strip 1 into a horizontal position. Finally, downstream of the diverting device 9 , there is arranged a rolling mill 10 in which the steel strip 1 is rolled down to a final thickness d 3 . After rolling, the steel strip 1 is wound up by means of a winding device 11 .
  • a technological control loop 2 ′, 3 ′, 5 ′, 7 ′, 9 ′ to 11 ′ is assigned to each of the installation parts 2 , 3 , 5 , 7 , 9 to 11 .
  • the technological control loop 2 ′ guides the liquid steel storage device 2 , the control loop 3 ′ the liquid steel charging device 3 , etc. All the components 2 to 11 are thus guided via their respective control loop 2 ′ to 11 ′.
  • a control system 12 is assigned to the continuous casting and rolling installation.
  • the control system 12 operates on the basis of mathematical models.
  • the models can optionally be implemented in neuronal networks, possibly also in fuzzy-neuro networks.
  • the control system connects the control loops 2 ′ to 11 ′ in respect of the individual installation parts 2 , 3 , 5 , 7 , 9 , 10 and 11 with regard to control.
  • FIG. 2 again shows, in more detail, the liquid steel storage device 2 , the liquid steel charging device 3 , the casting device 5 , the reduction device 7 and the rolling mill 10 .
  • the design of the mold 6 with individual plates 6 can be seen clearly.
  • the broad sides of the mold 6 consist of the plates 6 .
  • the narrow sides not visible in FIG. 2 , could also be fashioned in this manner.
  • the steel billet 1 produced by the casting device 5 already has a casting thickness d 1 of just 40 to 100 mm.
  • the strip width b lies preferably between 500 and 2000 mm.
  • the continuous casting and rolling installation is guided by the control system 12 in such a manner that the steel strip 1 exits the mold 6 as a billet with a rigid (solidified) billet shell 1 ′ and a liquid billet core 1 ′′. Complete solidification of the steel strip 1 does not occur until it is in the reduction device 7 .
  • the steel strip 1 is reduced to the rolling mill input thickness d 2 .
  • the rolling mill input thickness d 2 is preferably between 10 and 40 mm but usually lies between 15 and 35 mm. In any case, the steel strip 1 is reduced to a rolling mill input thickness d 2 which lies at least 25% below the casting thickness d 1 .
  • the reduction device 7 comprises an upper part 13 ′ and a lower part 13 ′′.
  • the steel strip 1 is reduced in thickness, in the lower part 13 ′′ it retains its form.
  • Guidance of the continuous casting and rolling installation by the control system 12 is designed such that the steel strip 1 does not solidify completely until it is in the lower part 13 ′′ of the reduction device 7 .
  • the upper part 13 ′ in which the steel strip 1 is re-formed, by contrast, it still has the liquid billet core 1 ′′.
  • a single vertically operating roll stand 7 ′′ here a four-high stand, can be arranged downstream of the reduction device.
  • the billet shells are pressed against one another by means of the roll stand 7 ′′ and thus weld together even better. A structural conversion is also already occurring.
  • the roll stand 7 ′′, if present, is preferably also guided by the control loop 7 ′ assigned to the reduction device 7 .
  • the diverting device 9 can in a conventional manner comprise so-called arc segments with guiding rolls in which the steel strip 1 is diverted into the horizontal.
  • the diversion can also be carried out in a different manner, in particular through the exertion of electromagnetic forces.
  • the steel strip 1 is fed as per FIG. 1 directly to the rolling mill 10 .
  • a descaler 14 is arranged between the diverting device 9 and the rolling mill 10 .
  • the descaler 14 is generally assigned to the technological control loop 10 ′ of the rolling mill 10 and is thus also guided by this control loop 10 ′.
  • the descaler 14 is thus also guided by a technological control loop, namely the control loop 10 ′ for the rolling mill 10 , this control loop 10 ′ being guided in turn by the control system 12 .
  • the rolling mill 10 can comprise up to 10 roll stands. It can be fashioned either as just a hot rolling mill or as a hot rolling mill with a cold rolling mill downstream. If the rolling mill 10 is fashioned as just a hot rolling mill, the steel strip 1 is rolled in the rolling mill 10 down to a final thickness d 3 of from 1.0 to 6.0 mm. If the rolling mill 10 is fashioned as a hot rolling mill with a cold rolling mill downstream, the steel strip 1 is rolled in the hot rolling mill down to an intermediate thickness d 4 of from 1.0 to 6.0 mm and in the cold rolling mill downstream to the final thickness d 3 , which in this case lies between 0.3 and 2.0 mm. At the final thickness d 3 , the steel strip 1 is then wound up by the winding device 11 .
  • the final thickness d 3 influences the rolling mill input thickness d 2 .
  • the rolling mill input thickness d 2 for a final rolled thickness d 3 of 1.0 mm is fifteen to twenty times the final thickness d 3 , while for a final rolled thickness d 3 of 6.0 mm it is six or seven times the final thickness d 3 . In this case, it lies between 15 and 42 mm.
  • the rolling mill input thickness d 2 emerges in this case in an analogous manner from the transitional thickness d 4 .
  • a cooling section 15 is arranged between the rolling mill 10 and the winding device 11 .
  • a (separate) technological control loop 15 ′ is assigned to the cooling section 15 , by which control loop the cooling section 15 is guided. This control loop 15 ′ is also guided by the control system 12 .
  • FIG. 3 represents schematically once again the components or installation parts 2 , 3 , 5 , 7 , 9 to 11 and 15 of the continuous casting and rolling installation.
  • the control loops 2 ′ to 11 ′, 15 ′ assigned to them and the control system 12 are also shown.
  • actual values which are characteristic of a material flow of the steel or steel strip 1 are recorded continuously—e.g. at a 0.2 second cycle—by the control loops 2 ′ to 11 ′, 15 ′.
  • the quantity inflow i.e. the mass change per unit time, is recorded.
  • the recorded inflow is transmitted to a path tracker 16 .
  • the casting level and an exit velocity with which the steel strip 1 exits the mold 6 are recorded in a known manner and transmitted to the path tracker 16 .
  • the material flow entering the mold 6 and the material flow exiting the mold 6 can thus readily be determined.
  • the material velocities of the steel strip 1 are in each case transmitted to the path tracker 16 .
  • the path tracker 16 On the basis of the information fed to it, the path tracker 16 is able to implement in a known manner path tracking of the steel or steel strip 1 through the entire continuous casting and rolling installation. The result of this path tracking is transmitted by the path tracker 16 to the control system 12 .
  • the control system 12 contains inter alia a material model 17 .
  • At least the pure thermal behavior of the steel or steel strip 1 can be modeled by means of the material model 17 .
  • phase changes in the steel or steel strip 1 e.g. the solidification behavior, i.e. the phase change from liquid to solid, or phase changes within the solid phase, e.g. from austenite to ferrite
  • structural characteristics of the steel strip 1 such as e.g. the grain size and the structural proportions also to be modeled within the framework of the material model 17 .
  • mechanical characteristics of the steel strip 1 such as e.g. the yield strength and tensile strength, can then also be determined.
  • both the temperature movements and the structural development of the steel strip 1 are calculated in real time across the entire installation—from the tundish 2 to the winding device 11 —while tracking the path of the steel strip 1 .
  • deviations in upstream installation parts e.g. the casting device 5
  • subsequent installation parts e.g. the cooling section 15 or the diverting device 7 .
  • the material model 17 preferably also models the re-forming behavior of the steel strip 1 in the rolling mill 10 , including temperature influences effected thereby. Models of this type are also generally known. The reader is referred in this respect by way of example to the earlier application “Computer-aided determination process in respect of set values for profile and surface evenness actuators” dated 15 Mar. 2002, official application no. 102 11 623.7, and to the prior art cited there.
  • the material model 17 needs a series of input variables.
  • the chemical composition of the molten steel is needed, since, among other things, conversion temperatures and structural characteristics depend on the chemical composition.
  • This composition is fed to the material model 17 either by a user or else—e.g. if the charging of a steel production device is recorded by the control loop assigned to it—automatically.
  • the melting temperature hereinafter designated T 0 .
  • This temperature T 0 is recorded by means of a measuring device 18 , known in the art, in the liquid steel storage device 2 and fed via the control loop 2 ′ or else directly to the control system 12 and then to the material model 17 as an initial parameter.
  • the melting temperature T 0 could also be recorded downstream of the liquid steel charging device 3 . This is indicated in FIG. 3 by a dashed line.
  • the individual installation parts 5 , 7 , 9 , 10 , 11 and 15 comprise locally active devices for influencing the temperature of the steel or steel strip 1 .
  • these devices comprise cooling devices, e.g. for spraying water on the steel strip 1 or for cooling the mold plates 6 .
  • heating devices in particular inductively acting heating devices, can also be provided. These devices are controlled via the corresponding control loops 5 ′, 7 ′, 9 ′, 10 ′, 11 ′, 15 ′. Their manipulated variables are likewise fed to the material model 17 .
  • the material model 17 On the basis of the information about the material flow which is fed to the material model 17 from the path tracker 16 and the information about influencing the temperature of the steel or steel strip 1 , the material model 17 is therefore able to model the thermal behavior of the steel or steel strip 1 while path tracking from the steel storage device 2 to the winding device 11 .
  • the technological control loops 2 ′ to 11 ′, 15 ′ can therefore be guided at the correct time by the control system 12 according to the modeled thermal behavior of the steel or steel strip 1 .
  • the locally active devices for influencing the temperature of the steel or steel strip 1 can be regulated via the technological control loops 2 ′ to 11 ′, 15 ′ assigned to the individual installation parts 2 to 11 , 15 in accordance with guidance by the control system 12 .
  • the material hardness and the rolling temperature can be determined from the model prior to the tapping of the steel strip 1 in a roll stand.
  • the material hardness in particular, depends inter alia on the rolling temperature and the thermo-mechanical pretreatment of the steel strip 1 .
  • the material hardness can be used in particular for determining the spring-back of the roll stand and the compensation thereof.
  • actual temperatures T 1 to T 6 of the steel strip 1 are recorded downstream of the mold 6 , downstream of the reduction device 7 , within the rolling mill 10 , downstream of the rolling mill 10 and within and downstream of the cooling section 15 and are fed to an adaptation element 19 .
  • the adaptation element 19 can thus determine in a manner known in the art correction factors K 1 to K 6 by means of which the material model 17 is (gradually) adapted to the actual behavior of the steel or steel strip 1 .
  • the exit velocity with which the steel strip 1 exits from the mold 6 can be varied. This influences the subsequent installation parts up to and including the winding device 11 .
  • a setting of a roll stand of the rolling mill 10 can be modified. This influences all subsequent roll stands of the rolling mill 10 as well as the cooling section 15 and the winding device 11 . Variations of this type in the material flow thus have an effect which extends across all installation parts.
  • the control system 12 also determines reference variables for measures of this kind which extend across all installation parts. These reference variables also influence indirectly the thermal behavior of the steel or steel strip 1 because they change the period of time during which the locally acting devices can act upon the steel strip 1 . If such reference variables which act across all installation parts are therefore changed and these changes are transmitted to the technological control loops 2 ′ to 11 ′, 15 ′, the relevant installation parts 2 to 11 , 15 are guided in accordance with this reference variable. Simultaneously, however, the set values in respect of the locally acting devices for influencing temperature further down the material flow are adapted correspondingly by the control system 12 so that the overall thermal behavior of the steel strip 1 remains unchanged.
  • the rolling mill 10 is arranged immediately downstream of the diverting device 9 .
  • a cast steel strip 1 must thus be rolled without delay in the rolling mill 10 .
  • a decoupling of casting process and rolling process emerges in this case.
  • the modeling of the steel strip 1 also takes this decoupling into account.
  • a further technological control loop 20 ′ which is also guided by the control system 12 , is assigned to the intermediate winder 20 and the equalizing furnace 21 in this case.
  • the rolling mill 10 , the winding device 11 , the intermediate winder 20 and the equalizing furnace 21 can be grouped together into a so-called Steckel mill.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Control Of Metal Rolling (AREA)
US10/548,551 2003-03-10 2004-02-20 Continuous Casting and Rolling Installation For Producing a Steel Strip Abandoned US20080135203A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10310357A DE10310357A1 (de) 2003-03-10 2003-03-10 Gießwalzanlage zur Erzeugen eines Stahlbandes
DE10310357.0 2003-03-10
PCT/EP2004/001694 WO2004080628A1 (fr) 2003-03-10 2004-02-20 Installation de coulee continue et de laminage pour produire un feuillard d'acier

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Publication Number Publication Date
US20080135203A1 true US20080135203A1 (en) 2008-06-12

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US10/548,551 Abandoned US20080135203A1 (en) 2003-03-10 2004-02-20 Continuous Casting and Rolling Installation For Producing a Steel Strip

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US (1) US20080135203A1 (fr)
EP (1) EP1601479A1 (fr)
CN (1) CN1758970A (fr)
DE (1) DE10310357A1 (fr)
WO (1) WO2004080628A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080006387A1 (en) * 2004-12-22 2008-01-10 Hans-Herbert Welker Continuous Casting and Rolling Plant for a Metal Strip, Production Method for a Metal Strip, and a Metal Strip Itself
US20100163205A1 (en) * 2007-08-04 2010-07-01 Seidel Juergen Method for the production of a strip made of steel
US10819719B2 (en) * 2016-10-11 2020-10-27 General Electric Company Systems and methods for protecting a physical asset against a threat
CN115194110A (zh) * 2022-07-22 2022-10-18 重庆钢铁股份有限公司 一种方坯连铸自动出坯系统及其控制方法
CN116571571A (zh) * 2023-06-02 2023-08-11 燕山大学 一种以薄铝板为中间层感应加热轧制复合铝/钢的方法
US20240100643A1 (en) * 2019-11-26 2024-03-28 Thyssenkrupp Steel Europe Ag Production of a desired metal workpiece from a flat metal product

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ITRM20050523A1 (it) * 2005-10-21 2007-04-22 Danieli Off Mecc Processo e impianto per la produzione di nastro metallico.
DE102006047718A1 (de) 2006-10-09 2008-04-17 Siemens Ag Verfahren zur Nachverfolgung des physikalischen Zustands eines Warmblechs oder Warmbands im Rahmen der Steuerung einer Grobblechwalzstraße zur Bearbeitung eines Warmblechs oder Warmbands
ITRM20070150A1 (it) 2007-03-21 2008-09-22 Danieli Off Mecc Processo e impianto per la produzione di nastro metallico
RU2492023C2 (ru) * 2008-11-04 2013-09-10 Смс Зимаг Аг Способ и устройство для управления затвердеванием непрерывной заготовки в установке для непрерывного литья при запуске процесса литья
DE102013220657A1 (de) * 2013-07-26 2015-01-29 Sms Siemag Ag Verfahren und Vorrichtung zur Herstellung eines metallischen Bandes im kontinuierlichen Gießwalzverfahren
DE102016211786A1 (de) * 2016-06-30 2018-01-04 Sms Group Gmbh Verfahren und Gießmaschine zum Gießen einer Metallschmelze
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US10819719B2 (en) * 2016-10-11 2020-10-27 General Electric Company Systems and methods for protecting a physical asset against a threat
US20240100643A1 (en) * 2019-11-26 2024-03-28 Thyssenkrupp Steel Europe Ag Production of a desired metal workpiece from a flat metal product
US12365974B2 (en) * 2019-11-26 2025-07-22 Thyssenkrupp Steel Europe Ag Production of a desired metal workpiece from a flat metal product
CN115194110A (zh) * 2022-07-22 2022-10-18 重庆钢铁股份有限公司 一种方坯连铸自动出坯系统及其控制方法
CN116571571A (zh) * 2023-06-02 2023-08-11 燕山大学 一种以薄铝板为中间层感应加热轧制复合铝/钢的方法

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CN1758970A (zh) 2006-04-12

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