EP4594028B1 - Procédé de fonctionnement d'une installation de production de bande chaude, produit programme d'ordinateur et installation de production de bande chaude pour la fabrication d'une bande chaude - Google Patents

Procédé de fonctionnement d'une installation de production de bande chaude, produit programme d'ordinateur et installation de production de bande chaude pour la fabrication d'une bande chaude

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Publication number
EP4594028B1
EP4594028B1 EP24829483.7A EP24829483A EP4594028B1 EP 4594028 B1 EP4594028 B1 EP 4594028B1 EP 24829483 A EP24829483 A EP 24829483A EP 4594028 B1 EP4594028 B1 EP 4594028B1
Authority
EP
European Patent Office
Prior art keywords
hot
hot strip
strip
temperature
equal
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
Application number
EP24829483.7A
Other languages
German (de)
English (en)
Other versions
EP4594028A1 (fr
EP4594028C0 (fr
Inventor
Thomas Daube
Christoph Hassel
Ulrich Sommers
Kai GRYBEL
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.)
SMS Group GmbH
Original Assignee
SMS Group GmbH
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Filing date
Publication date
Application filed by SMS Group GmbH filed Critical SMS Group GmbH
Publication of EP4594028A1 publication Critical patent/EP4594028A1/fr
Application granted granted Critical
Publication of EP4594028C0 publication Critical patent/EP4594028C0/fr
Publication of EP4594028B1 publication Critical patent/EP4594028B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • B21B37/76—Cooling control on the run-out table
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/34—Methods of heating
    • C21D1/42—Induction heating
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C21D1/667—Quenching devices for spray quenching
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D11/00—Process control or regulation for heat treatments
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D11/00—Process control or regulation for heat treatments
    • C21D11/005—Process control or regulation for heat treatments for cooling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0263—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/573—Continuous furnaces for strip or wire with cooling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/60—Continuous furnaces for strip or wire with induction heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B2001/225—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 by hot-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
    • B21B2261/00—Product parameters
    • B21B2261/20—Temperature
    • B21B2261/21—Temperature profile
    • 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
    • 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
    • B21B45/02—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 for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226—Hot rolling

Definitions

  • the present invention relates to a method for operating a hot strip production plant for manufacturing hot strip. Furthermore, the present invention relates to a hot strip production plant for manufacturing hot strip.
  • hot strip production plants heat a hot-rolled metallic material, in particular a slab, using a gas-fired furnace, especially a walking beam furnace. After hot rolling into a hot strip, the hot strip is cooled with a cooling device, in particular a laminar cooling device, and wound into a coil.
  • a cooling device in particular a laminar cooling device
  • the objective of known hot strip production plants is to produce a hot strip which, before being wound into a coil, has a temperature that is as constant as possible in the longitudinal direction, in the width direction and in the thickness direction.
  • the reason for the aforementioned objective of maintaining a constant temperature of the hot strip before winding is to achieve the most homogeneous material properties of the hot strip before winding.
  • a treatment plant can be a continuous galvanizing line (also: continuous galvanizing line (CGL)).
  • the invention is based on the objective of providing an improvement or an alternative to the prior art.
  • the material properties of a metallic product depend not only on the material composition but also on the microstructure of the metal, especially if the metal contains iron and carbon and can therefore also be called steel.
  • phase transformation process of steel influences its microstructure, particularly the ferrite, pearlite, bainite, martensite, and austenite content.
  • the microstructure of steel in turn, has This influences the properties of steel.
  • a locally differing cooling curve of steel leads to correspondingly different material properties in the same location.
  • a low pearlite content can be achieved through rapid cooling, resulting in lower hardness and/or improved formability. Alternatively, slower cooling can lead to greater hardness.
  • Hot-rolled strip is typically wound at a temperature at which the microstructural transformation of the metal is not yet complete.
  • the winding temperature is typically between 300 °C and 750 °C. This temperature range is merely an example to illustrate the typical range. The exact winding temperature depends on the alloy and/or the quality of the strip.
  • Temporal control refers to the adjustment of the temperature of the hot-rolled metal stock and/or hot-rolled strip by means of at least one dynamic temperature control element, in particular the adjustment of the temperature of the hot-rolled metal stock and/or hot-rolled strip in the longitudinal direction of the metal stock and/or hot-rolled strip, and especially the adjustment of the temperature of the hot-rolled metal stock and/or hot-rolled strip as a function of a coordinate in the longitudinal direction of the metal stock and/or hot-rolled strip.
  • the hot-rolled metal stock and/or hot-rolled strip can be tempered in such a way that a temperature varying in the longitudinal direction of the metal stock and/or hot-rolled strip is set within it.
  • a variable temperature can be set along the length of the metal stock and/or hot-rolled strip.
  • a “dynamic temperature control element” is understood to be a device configured to generate a varying temperature profile that corresponds to a varying temperature profile of the hot strip upstream of the coiler, with a value greater than or equal to 0.1 K/(m * mm) (Kelvin per 1 m length of the hot strip and per 1 mm thickness of the hot strip), preferably greater than or equal to 0.2 K/(m * mm) or greater than or equal to 0.4 K/(m * mm), and particularly preferably greater than or equal to 0.8 K/(m * mm).
  • the dynamic temperature control element can achieve the aforementioned values for the varying temperature profile by heating and/or cooling.
  • Tempering makes it possible to set different and/or variable temperatures along the length of the hot-rolled metal and/or the hot strip.
  • tempering can take place before hot rolling, i.e., in conjunction with a metallic hot-rolled material, and/or between two rolling stands and/or after hot rolling, i.e., in conjunction with a hot-rolled strip. Since the result of tempering persists in the hot-rolled strip in any case, for the purposes of this application, tempering of a hot-rolled strip can be understood as tempering before, during, and/or after hot rolling.
  • Tempering can be understood as partial or complete cooling of the metallic hot-rolled material and/or the hot strip and/or partial maintenance of the temperature of the metallic hot-rolled material and/or the hot strip and/or partial or complete heating of the metallic hot-rolled material and/or the hot strip.
  • a "varying temperature profile” is understood to mean a temperature profile that cannot be achieved by aiming for the most homogeneous temperature profile possible, as this would lead to inhomogeneity in the material properties.
  • a planned varying temperature profile exhibits a continuous connection between at least one maximum and one minimum value for a designated temperature and/or a high point and one low point for a designated temperature of the hot-rolled strip before winding.
  • the precipitation behavior and/or grain growth and/or different phase fractions of the hot strip can be locally altered in such a way that this targeted change, together with another unavoidable or deliberately induced local change in the precipitation behavior and/or grain growth and/or phase fractions due to inhomogeneous temperature control, can lead to overall homogeneous material properties up to the cooled hot strip or up to the cooled further processed strip, in particular cold strip, or up to the finished product.
  • material properties can refer to one, two, three, four, or more than four of the following parameters: yield strength, tensile strength, elongation at break, r-value, n value, brittle fracture transition temperature, phase components (austenite, ferrite, pearlite, bainite, martensite), electrical properties and/or remagnetization losses or the like.
  • a “heating device” is understood to be a device designed for heating, homogenizing, annealing, and/or maintaining the temperature of a hot-rolled metal stock.
  • a heating device can be configured to condition and/or prepare a hot-rolled metal stock for processing by a hot rolling mill. In this way, the temperature of a hot-rolled metal stock can be set for hot rolling by a heating device.
  • a heating device can thus be understood as a link between an upstream process step and a hot rolling mill.
  • a heating device can be designed as an inductor. Furthermore, a heating device can also be gas-fired, in particular using hydrogen and/or a fossil fuel.
  • a metallic hot-rolled product can be heated to a hot-rolling temperature by a heating device, starting at a low temperature or room temperature.
  • a hot-rolled metallic stock can be directly heated by a casting device for metallic Hot-rolled materials are transferred to a heating device and heated there to a hot-rolling temperature.
  • a hot-rolled metallic product can be annealed by a heating device at a constant temperature.
  • a temperature distribution in a rolled metallic product can be homogenized using a heating device.
  • a uniform temperature distribution in a hot-rolled metallic product can be achieved within a heating device.
  • heating devices can also be used to heat the metallic hot-rolled material without departing from the present aspect of the invention.
  • a Steckel mill can also be understood as a "hot strip production plant" in this context.
  • a varying temperature profile is preferably provided here, the maximum temperature of which, in the longitudinal direction of the hot strip, is at least 1% higher than the minimum temperature in the longitudinal direction of the hot strip. Furthermore, preferably the maximum temperature is greater than or equal to 2% higher than the minimum temperature, more preferably greater than or equal to 3%, and particularly Preferably greater than or equal to 5%. Preferably, the maximum temperature is greater than or equal to 4% higher than the minimum temperature, more preferably greater than or equal to 6%, and particularly preferably greater than or equal to 7%.
  • the maximum temperature may be less than or equal to 11% higher than the minimum temperature, preferably less than or equal to 9%, and particularly preferably less than or equal to 7%.
  • a temperature profile can be provided whose maximum temperature is greater than or equal to 5 °C higher than the minimum temperature, preferably greater than or equal to 10 °C and particularly preferably greater than or equal to 25 °C.
  • the maximum temperature is greater than or equal to 15 °C higher than the minimum temperature, more preferably greater than or equal to 20 °C and particularly preferably greater than or equal to 30 °C.
  • the maximum temperature is less than or equal to 45 °C higher than the minimum temperature, preferably less than or equal to 40 °C and particularly preferably less than or equal to 35 °C.
  • the temperature control of the hot strip before winding is carried out using a control system or regulation system that is data-coupled with the dynamic temperature actuator.
  • a control system can have a continuous linear controller, in particular a PD controller or a PID controller.
  • a dynamic temperature control element can include a cooling device, in particular a laminar cooling device and/or a transfer bar cooling device (also TBC for transfer bar cooling) and/or a compact cooling device with coolant nozzles for dispensing a coolant and/or an intermediate stand cooling device.
  • a cooling device can be arranged between the hot rolling mill and the coiler. It is known that cooling devices can have a cooling rate of 50 K/s, so that the hot strip can be cooled from a thickness-averaged temperature of 1,150 K to a thickness-averaged temperature of 650 K in a cooling time of 10 s using such a cooling device.
  • This cooling rate or in other words, the rate at which the temperature profile in the hot strip can be changed, is particularly fast compared to a gas-fired heating device and can—as has been shown—sufficiently influence the precipitation behavior and/or grain growth and/or different phase fractions in accordance with the overall objective. Therefore, a control system can be coupled with a cooling device and the cooling device can be adjusted accordingly to achieve the varying temperature profile proposed here.
  • a dynamic temperature controller can include a heating device, in particular an inductive heating device.
  • An inductive heating device can preferably be arranged upstream of the reel.
  • Such a heating device can have a nominal power density in conjunction with the hot strip of greater than or equal to 2 ⁇ 105 W/ m2 , preferably greater than or equal to 5 ⁇ 105 W/ m2 , and particularly greater than or equal to 1 ⁇ 106 W/ m2 . It has been shown that the precipitation behavior and/or grain growth and/or different phase fractions can be sufficiently influenced, corresponding to the overall objective, with the nominal power densities proposed above for a heating device.
  • a heating device can preferably be arranged as part of a dynamic temperature control element between the heating device and an outlet of the hot rolling device, in particular in front of one of the rolling stands of the hot rolling device.
  • a heating device can also preferably be arranged as part of a dynamic temperature control element between two rolling stands of the hot rolling mill.
  • a dynamic temperature control element cannot be understood to be a reel heating device which is set up for temperature control of a bundle, such as a reel heating device known from a Steckel Mill.
  • terminatating end refers to the side of a hot rolling mill where the hot strip is intended to exit the mill. In other words, it refers to the end of the hot rolling mill, which, with regard to is arranged on a designated material flow of the hot strip on the side of the reel.
  • the tempering of the metallic hot-rolled material and/or the hot strip is carried out over a length of greater than or equal to 95% of the metallic hot-rolled material and/or the hot strip, preferably over a length of greater than or equal to 97.5% or over a length of greater than or equal to 99% and particularly preferably over the entire length.
  • This proposal also addresses the tempering of significant areas of the head and/or end of a hot-rolled strip, particularly by means of a continuous temperature variation within the strip. This advantageously allows the head and/or end to be included in the present approach, thus extending the benefits described here to the head and/or end of the strip.
  • the varying temperature profile has a continuous profile, in particular a continuous profile over a length of greater than or equal to 50% of the metallic hot-rolled material and/or the hot strip, preferably over a length of greater than or equal to 95% or over a length of greater than or equal to 98% and particularly preferably over the entire length of the metallic hot-rolled material and/or the hot strip.
  • continuous progression refers to a continuous progression in the mathematical sense.
  • the temperature control of the metallic hot-rolled stock and/or the hot-rolled strip is carried out by means of the dynamic temperature control element over a length of greater than or equal to 95% of the metallic hot-rolled stock and/or the hot-rolled strip, preferably over a length of greater than or equal to 97.5% or over a length of greater than or equal to 99% and particularly preferably over the entire length of the metallic hot-rolled stock and/or the hot-rolled strip.
  • the varying temperature profile exhibits, at least in certain areas, a temperature difference of greater than or equal to 0.1 K/(m * mm) (Kelvin per 1 m length and per 1 mm thickness of the hot-rolled strip) per 1 m of length and per 1 mm thickness of the hot-rolled strip, preferably greater than or equal to 0.2 K/(m * mm) or greater than or equal to 0.4 K/(m * mm), and particularly preferably greater than or equal to 0.8 K/(m * mm).
  • the aforementioned values correspond to a varying temperature profile of the hot-rolled strip upstream of the coiler, regardless of the arrangement of the dynamic temperature control element within the hot-rolled strip production plant.
  • the above values for varying the temperature profile using the dynamic temperature control element allow for particularly advantageous temperature gradients to be achieved in the above sense, which, in combination with the cooling behavior of the hot-rolled strip and/or compensating for temperature differences through storage of the hot-rolled metallic material in a heating device and/or the subsequent processing of the cold-rolled strip, lead to particularly advantageous material properties, especially in the sense described above.
  • a maximum temperature at one end of the hot strip and a minimum temperature in a middle area of the hot strip can be provided for the varying temperature profile.
  • a maximum temperature and a minimum temperature can be provided in a middle area of the hot strip.
  • a minimum temperature and a maximum temperature can be provided in a middle area of the hot strip to accommodate the varying temperature profile at each end.
  • the varying continuous temperature profile can have a bathtub function, the profile of which is designed analogously to a wall profile of a bathtub in cross-section, with the maximum temperatures at the respective end of the profile and the minimum temperature in the middle area.
  • the middle section is arranged between the ends of the hot strip in the longitudinal direction of the hot strip.
  • At least two or at least three high points away from the ends are also required for the varying temperature profile. of the hot strip, i.e., in the middle area of the hot strip.
  • the contact surfaces of the metal stock can lead to locally lower temperatures of the stock and, after hot rolling, also of the hot-rolled strip. This can result in locally inhomogeneous precipitation behavior and/or grain growth and/or phase fractions, a locally differing microstructure, and consequently, varying material properties throughout the entire temperature control process, up to and including winding of the hot-rolled strip or complete cooling of the hot-rolled strip to ambient temperature.
  • Some strip processing plants have a continuous operating mode, whereby a plurality of wound hot strips are joined together at the input side and are continuously processed by the strip processing plant.
  • a varying temperature profile is suggested here, which provides a maximum temperature and a minimum temperature at opposite ends of the hot strip.
  • this allows the precipitation in the hot strip and/or the grain growth and/or the formation of different phase fractions to be trimmed in such a way that, during further treatment of the hot strip in a strip treatment plant at successive different annealing temperatures of successively treated material grades, a strip with largely homogeneous material properties can be produced overall.
  • the measurement data obtained can be compared with the desired target data. If differences are detected, a change to a control and/or regulation parameter can be derived, especially in such a way that an existing deviation in at least one mechanical property is reduced to a minimum or avoided altogether.
  • the dynamic temperature actuator is controlled or regulated using a process model, in particular a nonlinear process model.
  • the control of the dynamic temperature actuator can be achieved using a model-based controller, in particular a model-based controller based on a nonlinear process model.
  • Precise and reliable control can be advantageous in improving the dynamic behavior of thermal processes.
  • Mechanisms influencing temperature-dependent and material-dependent dynamic precipitation behavior, dynamic grain growth, and/or the dynamic formation of different phase fractions can also be used to develop a process model that can serve as a substitute system within a control or regulation framework.
  • Such a process model can contain linear or nonlinear model components and be supported by data, especially measurement data.
  • a process model can be modeled continuously over time using differential equations to reproduce the dynamics.
  • the process model can represent the precipitation process and/or the grain size formation process and/or the formation of different phase fractions with greater accuracy than is possible with linear control or using a continuous linear controller, in particular a proportional (P) controller, a proportional-determining (PD) controller, or a proportional-intensity (PID) controller.
  • P proportional
  • PD proportional-determining
  • PID proportional-intensity
  • the process model when directly compared to a continuous linear controller, allows for cross-coupling of various quantities and the explicit adherence to process-related boundary conditions, since continuous linear controllers are determined solely by a conservative choice of setting parameters, which is suitable in the optimal case.
  • the use of a process model allows the control or regulation of the temperature control of the metallic rolled material and/or the hot strip in the direction of an advantageous varying temperature profile.
  • the process model can also preferably include further processing of the hot strip in a downstream strip processing plant, so that the model predictive control of the The varying temperature profile makes it possible for the hot strip, which is further processed into a strip using a strip processing plant, to exhibit the desired, as homogeneous as possible, material properties after it has completely cooled to ambient temperature.
  • the process model can also include logistical relationships between the hot strip and the strip processing plant, as well as the process planning of the strip processing plant.
  • data from a database can be used to control or regulate the dynamic temperature actuator, in particular data containing metallurgical information and/or process planning information.
  • Linking to a database can also simplify the control or regulation of the dynamic temperature actuator; for example, behavior dependent on the composition of the metal can be taken into account using data from a database and/or an improvement in the homogeneity of the target material properties can be achieved.
  • a semi-empirical process model can be considered, which can use data from a database as well as may also have a model based on physical and/or chemical principles, in particular on a metallurgical basis.
  • Data can refer to data from the current process, a previous process and/or a subsequent processing process.
  • values of at least one measured variable for controlling or regulating the dynamic temperature actuator in particular a temperature measured variable, a metallurgical measured variable, a microstructure component variable, a material property variable, a metal structure variable, a process variable and/or a geometric variable, in particular a casting thickness.
  • a process parameter can include, among other things, the casting speed and/or an operating condition of the hot strip production plant and/or a strip treatment plant.
  • the use of a measured variable allows, among other things, the adjustment of the varying temperature profile for the next hot-rolled strip to be produced, depending on an actual value of a previously produced hot-rolled strip.
  • Considering measured variables within a process model can also be used to improve the modeling of the process model, especially when using a self-learning process model, particularly when using a neural network.
  • a particularly advantageous empirical or semi-empirical process model can be achieved if the process model is self-learning, especially using machine learning, which allows the mapping quality and model depth of the process model to be continuously improved in a comparatively simple way.
  • setpoints can be used in addition to measured values of these parameters to control or regulate the dynamic temperature actuator, in particular for a thickness reduction of the hot strip in a rolling stand, a final rolling temperature, a coiling temperature, a cooling strategy, an intermediate strip thickness, a degree of cold forming, an annealing temperature and/or a cooling stop temperature after annealing.
  • the determination of material values in the laboratory can also be considered a measured value of a measurand, provided that this is fed into the database and/or otherwise returned to the process model.
  • the hot-rolled strip can be divided in the longitudinal direction into at least three segments, preferably at least five segments, and particularly preferably at least seven segments, wherein target values for the material properties can be specified, at least implicitly, for each segment.
  • a segment can have different target values.
  • the modeling for a single target value can be continuous or continuous and differentiable.
  • a loss of hot-rolled strip in the form of scrap generated at the head end and/or the foot end can be taken into account.
  • the hot strip production plant includes a heating device for heating and/or homogenizing the metallic hot-rolled material.
  • the hot strip production plant includes a measuring device for recording a measured quantity, wherein the measuring device is data-coupled with the control device, in particular an IMPOC (Impulse Magnetic Process Online Controller).
  • IMPOC Impulse Magnetic Process Online Controller
  • a computer program product comprising program code means that cause the hot strip production plant according to the second aspect of the invention to execute the steps of the method according to the first aspect when the computer program product is executed on the control device of the hot strip production plant.
  • a hot strip 10 (not explicitly shown) has a longitudinal extent 12, a longitudinal extent direction 14 and two ends 16 each.
  • FIGs. 1 to 3 In each schematic representation, two temperature profiles 30, 31, 33 in figure sections (a) and (c) as well as in figure sections (b) and (d) show a material property 50, 55 corresponding to the respective temperature profile 30, 31, 33, in particular a tensile strength of the hot strip 10.
  • the corresponding sections of the figure are (a) and (b), i.e., the material property 55 in the figure section (b) corresponds to the temperature profile 30, 31 in the figure section (a), as well as the figure sections (c) and (d), i.e., the material property 50 in the figure section (d) corresponds to the temperature profile 33 in the figure section (c).
  • Figure sections (a) and (b) are each known, while figure sections (c) and (d) are according to the invention.
  • a hot strip production plant has the objective of maintaining a temperature 30 as constant as possible over the longitudinal extent 12 of the hot strip 10.
  • the hot strip 10 After winding, the hot strip 10 cools down at different rates along its longitudinal length 12. While the outer and inner windings cool down relatively quickly, heat builds up in the interior of the coil, so that cooling in the interior of the coil proceeds more slowly.
  • the varying temperature profile 33 has a bathtub-like shape, with a minimum temperature 40 in a middle region and a maximum temperature 42 at the ends 16 of the hot strip 10.
  • a trimmed varying temperature profile 33 can lead to the hot strip 10, after cooling, or a strip 20 (not shown) after further treatment by means of a strip treatment plant, in particular a strip treatment plant having a process step in which the strip is annealed, exhibiting a homogeneous profile 50 of a material property, wherein the profile 50 of the material property exhibits improved homogeneity, in particular compared to the known profile 55 of the material property.
  • the second embodiment according to Fig. 2 shows an inhomogeneity of a material property 55 as a result of a temperature profile 31 during the leaching of a substance that later becomes a Hot-rolled strip 10 of hot-rolled metallic material from the heating device. Since this temperature distribution 31 only extends lengthwise during hot rolling, the temperature profile 31 has already been transferred to a hot-rolled strip 10 in section (a) of the figure.
  • the temperature distribution 31 has three low points which correspond to the beams of a walking beam heating device, through which the metallic hot-rolled material has not been heated homogeneously in the heating device.
  • a varying temperature profile 33 is established in the hot strip 10.
  • the varying temperature profile 33 exhibits three high points 44.
  • the third embodiment according to Fig. 3 This shows an inhomogeneity of a material property 55 after the strip 20 exits a continuous strip processing plant. During the production of the hot strip 10, this was achieved according to the temperature profile 30 in the hot strip production plant before winding.
  • the temperature control of the heating device of the strip processing plant leads in this case to the following course 55 of the material property after the strip 20 has exited the Strip processing plant, since the heating device of the processing plant was adjusted at one end of the strip to achieve a different temperature required for a quality of an adjacent strip.
  • the dynamics of this temperature change in the continuously operated strip processing plant can be seen in the course of material property 55.
  • the varying temperature profile 33 exhibits a minimum temperature 40 at one end 16 of the hot strip 10 and a maximum temperature 42 at the opposite end 16 of the hot strip 10, the temperature profile in the middle region of the hot strip 10 corresponding to the dynamics of the heating device of the downstream continuous strip processing plant.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Control Of Heat Treatment Processes (AREA)
  • Metal Rolling (AREA)

Claims (26)

  1. Procédé permettant de faire fonctionner une installation de production de feuillard à chaud pour la fabrication d'un feuillard à chaud (10), dans lequel l'installation de production de feuillard à chaud présente
    - un dispositif de laminage à chaud pour le laminage à chaud du feuillard à chaud (10) à partir d'un produit laminé à chaud métallique ;
    - un dévidoir pour l'enroulement du feuillard à chaud (10) sur une bobine ; et
    - au moins un élément de réglage de température dynamique ;
    dans lequel le procédé présente les étapes de procédé suivantes :
    - laminage à chaud du feuillard à chaud (10) à partir du produit laminé à chaud métallique avec le dispositif de laminage à chaud ;
    - équilibrage de température du produit laminé à chaud métallique et/ou du feuillard à chaud (10) avec l'élément de réglage de température dynamique ; et
    - enroulement du feuillard à chaud (10) en bobine ;
    dans lequel le procédé est caractérisé en ce que l'équilibrage de température du produit laminé à chaud métallique et/ou du feuillard à chaud (10) est commandé ou régulé au moyen de l'élément de réglage de température dynamique de telle sorte que le feuillard à chaud (10) présente, avant l'enroulement, une courbe de température variable (33) dans une direction d'extension longitudinale (14), dans lequel la courbe de température variable (33) présente une température minimale (40) et une température maximale (42).
  2. Procédé selon la revendication 1, caractérisé en ce que l'installation de production de feuillard à chaud présente un dispositif de chauffage pour le chauffage et/ou l'homogénéisation du produit laminé à chaud métallique, dans lequel le procédé présente l'étape de procédé consistant à :
    - chauffer et/ou homogénéiser le produit laminé à chaud métallique avec le dispositif de chauffage.
  3. Procédé selon l'une des revendications 1 ou 2, caractérisé en ce que la température maximale (42) est prévue supérieure ou égale à 1 % de la température minimale (40), de préférence supérieure ou égale à 2 % et de manière particulièrement préférée supérieure ou égale à 5 %.
  4. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que la température maximale (42) est supérieure ou égale à 5 °C de la température minimale (40), de préférence supérieure ou égale à 10 °C et de manière particulièrement préférée supérieure ou égale à 25 °C.
  5. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que la courbe de température variable (33) présente une évolution continue, en particulier une évolution continue sur une longueur supérieure ou égale à 50 % du produit laminé à chaud métallique et/ou du feuillard à chaud (10), de préférence sur une longueur supérieure ou égale à 95 % ou sur une longueur supérieure ou égale à 98 % et de manière particulièrement préférée sur toute la longueur.
  6. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que l'équilibrage de température du produit laminé à chaud métallique et/ou du feuillard à chaud (10) est effectué sur une longueur supérieure ou égale à 95 % du produit laminé à chaud métallique et/ou du feuillard à chaud (10), de préférence sur une longueur supérieure ou égale à 97,5 % ou sur une longueur supérieure ou égale à 99 % et de manière particulièrement préférée sur toute la longueur.
  7. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que la courbe de température variable (33) présente, au moins dans certaines zones, une différence de température, par 1 m de longueur du feuillard à chaud (10) et par 1 mm d'épaisseur du feuillard à chaud (10), supérieure ou égale à 0,1 K / (m * mm), de préférence supérieure ou égale à 0,2 K / (m * mm) ou supérieure ou égale à 0,4 K / (m * mm) et de manière particulièrement préférée supérieure ou égale à 0,8 K / (m * mm).
  8. Procédé selon l'une des revendications 1 à 7, caractérisé en ce que la température maximale (42) est prévue à une extrémité du feuillard à chaud (10) et la température minimale (40) est prévue dans une zone centrale du feuillard à chaud (10).
  9. Procédé selon l'une des revendications 1 à 7, caractérisé en ce que la température minimale (40) est prévue à une extrémité du feuillard à chaud (10) et la température maximale (42) est prévue dans une zone centrale du feuillard à chaud (10).
  10. Procédé selon l'une des revendications 1 à 7, caractérisé en ce que la courbe de température (33) présente au moins deux ou au moins trois points hauts (44) à l'écart des extrémités (16) du feuillard à chaud (10).
  11. Procédé selon l'une des revendications 1 à 7, caractérisé en ce que la température maximale (42) et la température minimale (40) sont prévues aux extrémités (16) opposées du feuillard à chaud (10).
  12. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que l'élément de réglage de température dynamique présente un dispositif de refroidissement, en particulier un dispositif de refroidissement laminaire et/ou un refroidissement par transfert et/ou un refroidissement compact présentant des buses d'agent de refroidissement pour l'évacuation d'un agent de refroidissement et/ou un refroidissement entre cages.
  13. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que l'élément de réglage de température dynamique présente un dispositif de chauffage, en particulier un dispositif de chauffage par induction.
  14. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que l'élément de réglage de température dynamique présente une densité de puissance nominale en liaison fonctionnelle avec le feuillard à chaud (10) supérieure ou égale à 2 · 105 W/m2, de préférence supérieure ou égale à 5 · 105 W/m2 et plus particulièrement supérieure ou égale à 1 · 106 W/m2.
  15. Procédé selon l'une des revendications précédentes,
    caractérisé en ce qu'un élément de réglage de température dynamique est disposé entre le dispositif de laminage à chaud et le dévidoir.
  16. Procédé selon l'une des revendications précédentes,
    caractérisé en ce qu'un élément de réglage de température dynamique est disposé entre le dispositif de chauffage et une extrémité de sortie du dispositif de laminage à chaud.
  17. Procédé selon l'une des revendications précédentes, caractérisé par les étapes suivantes :
    - détection d'une propriété mécanique du feuillard à chaud (10) fabriqué, en particulier avec un IMPOC (dispositif de commande en ligne de procédé magnétique à impulsion, impulse magnetic process online controller) ; et
    - dérivation d'une consigne de commande ou de régulation nécessaire pour l'élément de réglage de température dynamique pour un produit laminé à chaud métallique suivant et/ou pour un feuillard à chaud (10) suivant.
  18. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que la commande ou la régulation de l'élément de réglage de température dynamique est effectuée à l'aide d'un modèle de processus, en particulier à l'aide d'un modèle de processus non linéaire.
  19. Procédé selon la revendication 18, caractérisé en ce que le modèle de processus présente une construction de modèle physique et/ou chimique, en particulier une construction de modèle métallurgique.
  20. Procédé selon l'une des revendications 18 ou 19, caractérisé en ce que le modèle de processus présente un modèle de processus à apprentissage autonome.
  21. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que, pour la commande ou la régulation de l'élément de réglage de température dynamique, des données provenant d'une base de données peuvent être utilisées, en particulier des données présentant des informations métallurgiques et/ou des informations de planification de processus, en particulier des données d'un processus précédent, du processus actuel et/ou d'un processus de traitement en aval.
  22. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que, pour la commande ou la régulation de l'élément de réglage de température dynamique, des valeurs d'une grandeur de mesure peuvent être utilisées, en particulier une grandeur de mesure de température, une grandeur de mesure métallurgique, une grandeur de composant de microstructure, une grandeur de propriété de matériau, une grandeur de structure métallique, une grandeur de processus et/ou une grandeur de géométrie.
  23. Installation de production de feuillard à chaud pour la fabrication d'un feuillard à chaud (10), présentant :
    - un dispositif de laminage à chaud pour le laminage à chaud du feuillard à chaud (10) à partir d'un produit laminé à chaud métallique ;
    - au moins un élément de réglage de température dynamique ;
    - un dévidoir pour l'enroulement du feuillard à chaud (10) sur une bobine ; et
    - un appareil de commande couplé par des données à l'élément de réglage de température dynamique pour la transmission de signaux de commande ;
    caractérisée en ce que
    l'appareil de commande est configuré pour mettre en œuvre un procédé selon l'une des revendications 1 à 22.
  24. Installation de production de feuillard à chaud selon la revendication 23, caractérisée en ce que l'installation de production de feuillard à chaud présente un dispositif de chauffage pour le chauffage et/ou l'homogénéisation du produit laminé à chaud métallique.
  25. Installation de production de feuillard à chaud selon l'une des revendications 23 ou 24, caractérisée en ce que l'installation de production de feuillard à chaud présente un moyen de mesure pour la détection d'une grandeur de mesure, dans laquelle le moyen de mesure est couplé par des données à l'appareil de commande.
  26. Produit programme informatique comprenant des moyens formant code de programme qui amènent l'installation de production de feuillard à chaud selon l'une des revendications 23 à 25 à mettre en œuvre les étapes d'un procédé selon l'une des revendications 1 à 22 lorsque le produit programme informatique est mis en œuvre sur l'appareil de commande de l'installation de production de feuillard à chaud.
EP24829483.7A 2023-12-20 2024-12-17 Procédé de fonctionnement d'une installation de production de bande chaude, produit programme d'ordinateur et installation de production de bande chaude pour la fabrication d'une bande chaude Active EP4594028B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102023135965.7A DE102023135965A1 (de) 2023-12-20 2023-12-20 Verfahren zum Betrieb einer Warmbandproduktionsanlage und Warmbandproduktionsanlage zur Herstellung eines Warmbandes
PCT/EP2024/086726 WO2025132310A1 (fr) 2023-12-20 2024-12-17 Procédé de fonctionnement d'une installation de production de bande chaude, produit programme d'ordinateur et installation de production de bande chaude pour la fabrication d'une bande chaude

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EP4594028C0 EP4594028C0 (fr) 2025-12-10
EP4594028B1 true EP4594028B1 (fr) 2025-12-10

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EP (1) EP4594028B1 (fr)
DE (1) DE102023135965A1 (fr)
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Publication number Priority date Publication date Assignee Title
DE2507641A1 (de) * 1975-02-21 1976-09-02 Sp K Bjuro Uraltschermetwtomat Regelverfahren zur temperaturkonstanthaltung beim kuehlen warmgewalzten bandes vor dessen aufspulen und vorrichtung zur durchfuehrung des verfahrens
DE19632448A1 (de) * 1996-08-05 1998-02-12 Mannesmann Ag Verfahren und Anlage zur Herstellung von Band aus niedriggekohlten und ultraniedriggekohlten Stählen
DE10327383C5 (de) * 2003-06-18 2013-10-17 Aceria Compacta De Bizkaia S.A. Anlage zur Herstellung von Warmband mit Dualphasengefüge
DE102020205655A1 (de) * 2020-05-05 2021-11-11 Sms Group Gmbh Verfahren zum Steuern oder Regeln der Temperatur eines Stahlbandes bei der Warmumformung in einer Warmbandstraße
DE102020214643A1 (de) * 2020-11-20 2022-05-25 Sms Group Gmbh Verfahren zur Einstellung der Eigenschaften eines Warmbandes mit einer bestimmten chemischen Zusammensetzung in einer Warmwalzstraße
DE102021212902A1 (de) * 2021-11-17 2023-05-17 Sms Group Gmbh Verfahren zum Herstellen eines Warmbandes aus einem Feinkornstahlwerkstoff

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WO2025132310A1 (fr) 2025-06-26
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DE102023135965A1 (de) 2025-06-26

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