Device for the thermal treatment of a metallic workpiece, production line and process

Abstract

The invention relates to a device (1) for the thermal treatment of a metallic workpiece (2) conveyed in a conveying direction (R1) of a production line (100) comprising a rolling device (51, 61), comprising a first temperature change module (10) and a second temperature change module (20), wherein the first temperature change module (10) has a higher nominal power density than the second temperature change module (20) and is configured to reduce the temperature (T) of the metallic workpiece (2) to a first outlet temperature (T A1 ) to change; and wherein the second temperature change module (20) is configured to reduce a temperature difference between a surface temperature of the metallic workpiece and a core temperature of the metallic workpiece to ≤ 50 °C. The invention further relates to a production line (100), a method and the use of such a device (1) and such a production line (100).

Description

[0001] The invention relates to a device for the thermal treatment of a metallic workpiece conveyed in a conveying direction, a production line for the manufacture and / or processing of a metallic workpiece, and a method for the thermal treatment of a metallic workpiece.

[0002] Furthermore, the invention relates to the use of such a device for the thermal treatment of a metallic workpiece and the use of such a production line for the manufacture and / or processing of a metallic workpiece.

[0003] Before forming, especially rolling, a metallic workpiece, particularly a slab, the temperature of the workpiece must be adjusted to the process requirements of the forming operation to achieve the desired surface qualities as well as mechanical, physical, and / or electromagnetic properties. This requires the ability to precisely control the temperature of the workpiece over time before forming. Current state of the art requires large amounts of energy for this process and often emits significant quantities of carbon, especially carbon dioxide.

[0004] The invention is based on the objective of providing a device for the thermal treatment of a metallic workpiece, by means of which the temperature of the metallic workpiece can be precisely set and at the same time the energy used and the resulting carbon emissions can be reduced.

[0005] The problem underlying the invention is solved by a device having the features of claim 1. Advantageous embodiments are described in the dependent claims.

[0006] In more detail, the problem underlying the invention is solved by a device for the thermal treatment of a metallic workpiece conveyed in a conveying direction of a production line having a rolling device, wherein the device has a first temperature change module and a second temperature change module, wherein the first temperature change module has a higher nominal power density than the second temperature change module and is configured to change the temperature of the metallic workpiece to a first outlet temperature, and wherein the second temperature change module is configured to reduce a temperature difference between a surface temperature of the metallic workpiece and a core temperature of the metallic workpiece to ≤ 50 °C, preferably to ≤ 30 °C, more preferably to ≤ 20 °C and particularly preferably to ≤ 10 °C.The device includes a control and regulation unit configured to determine a rolling temperature of the metallic workpiece; to determine a first setpoint for the first exit temperature of the metallic workpiece as a function of the rolling temperature; and to control the first temperature change module such that the first exit temperature of the metallic workpiece corresponds to the first setpoint.

[0007] When the intended use of the device is mentioned below, this refers to the use of the device in a production line for the manufacture and / or processing of a metallic workpiece.

[0008] A device designed in this way offers the advantage that, when used as intended, the temperature of the metallic workpiece can be precisely set to the required temperature for forming before the workpiece is formed, while simultaneously increasing the device's energy efficiency. A high-power-density first temperature-changing module allows a large amount of energy to be introduced into the metallic workpiece within a short time and over a short conveying distance, thus increasing its temperature. This process can create temperature differences between the surface temperature and the core temperature of the metallic workpiece.By using a second temperature change module to reduce these temperature differences of the metallic workpiece, a sufficiently homogeneous temperature distribution of the metallic workpiece, required for forming, can be achieved. This allows for improved and more precise temperature control of the metallic workpiece.

[0009] A metallic workpiece can be a semi-finished product which contains at least one metal or which has a metal content greater than or equal to 90 wt.%, preferably a metal content greater than or equal to 95 wt.%, more preferably a metal content greater than or equal to 96 wt.% and particularly preferably a metal content greater than or equal to 98 wt.%.

[0010] The metallic workpiece has a thickness, a width, and a length, and may alternatively have an infinite length. The metallic workpiece further comprises a surface and a core, and the surface temperature of the metallic workpiece may differ from the core temperature. Accordingly, the surface temperature of the metallic workpiece may differ from the core temperature, particularly due to heat flow from the surroundings of the metallic workpiece into the metallic workpiece and / or heat flow from the metallic workpiece to its surroundings. The surface temperature of the metallic workpiece is therefore preferably the temperature of the metallic workpiece present at a surface of the metallic workpiece.The core temperature of the metallic workpiece is therefore preferably the temperature present in a core region of the metallic workpiece. The core region of a metallic workpiece can extend across the thickness of the workpiece to its surface. In other words, the core region and the surface are in direct contact. The core region of the metallic workpiece can extend across the thickness of the workpiece to ≤ 1 mm from the surface, preferably to ≤ 5 mm, more preferably to ≤ 10 mm, and particularly preferably to ≤ 15 mm.

[0011] Heating and / or cooling a metallic workpiece can result in significant temperature differences within it. When a metallic workpiece cools, its core cools more slowly than its surface. Similarly, when a metallic workpiece is heated, its surface may heat up faster than its core. Furthermore, temperature differences can also arise from treatment processes and / or casting processes.

[0012] A metallic workpiece can be a billet, where a billet has a thickness that is essentially equal to its width. In other words, a billet has a substantially square cross-sectional area.

[0013] A metallic workpiece can be a pre-block. Preferably, the width of a pre-block is less than or equal to 1.4 times its thickness, more preferably less than or equal to 1.3 times its thickness, and particularly preferably less than or equal to 1.2 times its thickness.

[0014] The metallic workpiece can be a slab. Preferably, the width of a slab is less than or equal to 35 times its thickness, more preferably less than or equal to 30 times its thickness, and particularly preferably less than or equal to 20 times its thickness. Furthermore, preferably the width of a slab is greater than or equal to 1.5 times its thickness, more preferably greater than or equal to 1.6 times its thickness, and particularly preferably greater than or equal to 2 times its thickness.

[0015] A slab is also referred to as a thick slab if it has a thickness greater than or equal to 150 mm, preferably a thickness greater than or equal to 180 mm and particularly preferably a thickness greater than or equal to 220 mm.

[0016] A slab is also referred to as a thin slab if it has a thickness of less than or equal to 150 mm, preferably a thickness of less than or equal to 135 mm and particularly preferably a thickness of less than or equal to 120 mm.

[0017] Preferably, a slab has a length of 1.2 m or more, more preferably 1.5 m or more, more preferably 1.8 m or more, and particularly preferably 2 m or more. Furthermore, preferably, a slab has a length of 4 m or more, more preferably 5 m or more, more preferably 10 m or more, and particularly preferably 12 m or more.

[0018] The metallic workpiece can be a sheet metal part. Preferably, a sheet metal part has a thickness of less than or equal to 200 mm, more preferably a thickness of less than or equal to 150 mm, and more preferably a thickness of less than or equal to 100 mm. Furthermore, preferably the width of a sheet metal part is greater than or equal to 10 times its thickness, more preferably greater than or equal to 20 times its thickness, and more preferably greater than or equal to 30 times its thickness.

[0019] The metallic workpiece is preferably conveyed along its length in the conveying direction. In other words, the conveying direction and the length of the metallic workpiece preferably run parallel to each other.

[0020] A power density is preferably an area power density with the unit W / m². 2, where the power density denotes the distribution of the power of a temperature-change module over a surface of the metallic workpiece, in particular the surface of the top of the metallic workpiece and the surface of the bottom of the metallic workpiece. In other words, the power density of a temperature-change module denotes the power per m² delivered to the metallic workpiece by the temperature-change module. 2 the surface of the metallic workpiece. The power density of a temperature-change module referred to here can therefore also be described as the power density within the metallic workpiece.

[0021] The nominal power density of a temperature change module is preferably the maximum power density achievable by the temperature change module during operation of the temperature change device. A temperature change module with a nominal power density of greater than or equal to 5 × 10 5 w / m 2 is therefore designed to provide a power output greater than or equal to 5·10 5 to be able to dissipate W per square meter of the surface of the metallic workpiece. In some cases, where the edges of the metallic workpiece are specifically heated separately, the surface area of ​​the metallic workpiece relevant for determining the power density can also extend to the side surface of the metallic workpiece heated by an edge heater, extending beyond the top and bottom surfaces.

[0022] The first temperature change module can achieve a nominal power density of ≥ 5·10 4w / m 2 , ≥ 9·10 4 w / m 2 , ≥ 1·10 5 w / m 2 , ≥ 2·10 5 w / m 2 , ≥ 3.5·10 5 w / m 2 , ≥ 5·10 5 w / m 2 , ≥ 7·10 5 w / m 2 , ≥ 8.5·10 5 w / m 2 , ≥ 1·10 6 w / m 2 or ≥ 2·10 6 w / m 2 This allows the temperature of the metallic workpiece to be changed more quickly, so that with such a device the temperature of a metallic workpiece can be set more rapidly before forming. According to a preferred embodiment, the first temperature change module can have a nominal power density of ≥ 1·10 6 w / m 2 and ≤ 3·10 6 w / m 2 exhibit, preferably a nominal power density of 2·10 6 w / m 2

[0023] An exit temperature of a metallic workpiece is preferably the temperature the metallic workpiece has when leaving a temperature change module. In other words, an exit temperature is the temperature the metallic workpiece has, relative to the conveying direction, immediately after a temperature change module. For example, a first exit temperature of the metallic workpiece is the temperature the metallic workpiece has, relative to the conveying direction, immediately after the first temperature change module. A second exit temperature of the metallic workpiece is preferably the temperature the metallic workpiece has, relative to the conveying direction, immediately after the second temperature change module.

[0024] The discharge temperature of a metallic workpiece can include a mean discharge temperature, a core discharge temperature and / or a surface discharge temperature.

[0025] For example, a temperature change module can be configured to change the average temperature of the metallic workpiece to an average outlet temperature. Here, the average temperature of a metallic workpiece is preferably a volume-averaged temperature of the metallic workpiece.

[0026] The second temperature change module can be configured to reduce the temperature difference between the surface temperature and core temperature of the metallic workpiece to ≤ 100 °C, preferably to ≤ 80 °C, more preferably to ≤ 60 °C, and most preferably to ≤ 15 °C. Furthermore, the second temperature change module can be configured to reduce the temperature difference between the surface temperature and core temperature of the metallic workpiece to ≤ 40 °C, more preferably to ≤ 30 °C, more preferably to ≤ 20 °C, and most preferably to ≤ 10 °C. According to a preferred embodiment, the second temperature change module can be configured to reduce the temperature difference between the surface temperature and core temperature of the metallic workpiece to ≤ 5 °C.Such a reduction in temperature difference can also be described as homogenizing the temperature of the metallic workpiece. This allows for a more uniform metallic microstructure, particularly a fine-grained microstructure, to be achieved more effectively through subsequent forming processes.

[0027] The second temperature change module can achieve a nominal power density of ≥ 5·10 4 w / m 2 , ≥ 9·10 4 w / m 2 , ≥ 1·10 5 w / m 2 , ≥ 2·10 5 w / m 2 , ≥ 3.5·10 5 w / m 2 , ≥ 5·10 5 w / m 2 , ≥ 7·10 5 w / m 2 , ≥ 8.5·10 5 w / m 2 , ≥ 1·10 6 w / m 2 or ≥ 2·10 6 w / m 2 exhibiting. According to a preferred embodiment, the second temperature change module has a nominal power density of ≥ 1·10 4 w / m 2 and ≤ 3·10 4 w / m 2preferably a nominal power density of 2·10 4 w / m 2 .

[0028] The second temperature change module can be configured to change the temperature of a temperature change range associated with the second temperature change module at a temperature change rate of less than or equal to 20 K / min, preferably less than or equal to 15 K / min, more preferably less than or equal to 10 K / min, more preferably less than or equal to 8 K / min, and most preferably less than or equal to 2.5 K / min. The second temperature change module is further preferably configured to change the temperature of the temperature change range associated with the second temperature change module at a temperature change rate of less than or equal to 1.8 K / min, more preferably less than or equal to 1 K / min, more preferably less than or equal to 0.8 K / min, and most preferably less than or equal to 0.5 K / min.

[0029] Within a temperature change zone of a temperature change module, power is preferably delivered by the temperature change module to the metallic workpiece, preferably to a surface of the metallic workpiece, to change its temperature. Preferably, the metallic workpiece is located at least partially within a temperature change zone of a temperature change module while the temperature change module is changing the temperature of the metallic workpiece. A temperature change zone preferably has a volume that is at least partially, and preferably completely, confined to the surroundings. For example, a temperature change zone of a temperature change module is a furnace volume or a portion thereof. The temperature change zone can, for example, have a volume of less than or equal to 600 m³. 3include, preferably of less than or equal to 500 m 3 , especially preferred if less than or equal to 250 m 3 and especially preferred if less than or equal to 100 m 3 The temperature change range can, for example, be a volume greater than or equal to 60 m³. 3 include, preferably of greater than or equal to 125 m 3 , preferably of greater than or equal to 300 m 3 and especially preferably of 450 m or greater 3 .

[0030] The temperature of the temperature change range can be variable. For example, the temperature of the temperature change range can be adjusted to a predetermined nominal temperature. The nominal temperature can be the temperature of the temperature change range of the associated temperature change module required during operation of the device for changing the temperature of the metallic workpiece.

[0031] The temperature change rate of a temperature change module is preferably the maximum possible rate at which the temperature change module can change the temperature of the temperature change range associated with the temperature change module from a first temperature to a second temperature, for example, the nominal temperature. For example, a temperature change module with a temperature change rate of 2 K / min can change the temperature of the associated temperature change range by 2 K in one minute, preferably increasing or decreasing it.

[0032] The rate of temperature change of a temperature change module can vary, for example, depending on the first and second temperatures of the temperature change range. For example, the rate of temperature change in the range from a first temperature of 50 °C to a second temperature of 500 °C can be greater than in the range from a first temperature greater than 500 °C to a second temperature of 1000 °C.

[0033] Preferably, a temperature change module has a temperature change rate from a first temperature of 0°C to a second temperature of less than or equal to 500°C of less than or equal to 20 K / min, preferably less than or equal to 15 K / min, more preferably less than or equal to 10 K / min, and particularly preferably less than or equal to 8 K / min.

[0034] Preferably, a temperature change module has a temperature change rate from a first temperature of greater than or equal to 500°C to a second temperature of less than or equal to 1000°C of less than or equal to 10 K / min, preferably less than or equal to 8 K / min, more preferably less than or equal to 6 K / min, and particularly preferably less than or equal to 4 K / min.

[0035] Preferably, a temperature change module has a temperature change rate from a first temperature of greater than or equal to 950°C to a second temperature of less than or equal to 1250°C of less than or equal to 8 K / min, preferably less than or equal to 6 K / min, more preferably less than or equal to 5 K / min, and particularly preferably less than or equal to 3 K / min.

[0036] The second temperature change module can include one or more passive temperature change devices and / or one or more active temperature change devices. The first temperature change module can include one or more passive temperature change devices and / or one or more active temperature change devices.

[0037] The passive temperature-modifying device can be designed as an insulating heat-holding device, in particular a furnace housing. A passive temperature-modifying device allows the thermal energy with which the metallic workpiece enters the first and / or second temperature-modifying module to be used more effectively for the even distribution of temperature within the metallic workpiece. This enables a particularly energy-efficient homogenization of the temperature distribution of the metallic workpiece.

[0038] The active temperature-changing device can also be referred to as a heating element. For example, the active temperature-changing device can be designed as a DFI module, a flameless porous burner, a gas burner, a radiant heater (preferably an electrically operated radiant heater), or an induction heating device.

[0039] A radiant heater can be operated using electrical energy. Such a heater typically generates heat radiation by heating a resistor through an electric current. This type of electric heater can also be called a resistance heater. A radiant heater is preferably designed to emit heat radiation to a metallic workpiece. An electrically operated radiant heater can have a nominal power density of 2 × 10⁻⁶. 4 w / m 2 to reach, preferably from 3·10 4 w / m 2 , preferably of 1.5·10 5 w / m2 .

[0040] A gas burner can be expediently designed in combination with at least one corresponding radiant tube as the heating medium. The nominal power density of a gas burner can be 2.5 × 10 4 w / m 2 to reach, preferably 5·10 4 w / m 2 , preferably 1·10 5 w / m 2 and especially preferred 1·10 6 w / m 2 .

[0041] An induction heating device is designed to increase the temperature of a metallic workpiece using a magnetic field. An induction heating device comprises at least one coil which, in conjunction with at least one capacitor, forms a resonant circuit. This resonant circuit can be supplied with electrical energy by a power supply unit. The power supply unit may include an inverter, which is preferably connected, or can be connected, to a DC link.

[0042] An induction heating device can have a nominal power density of greater than or equal to 1·10 6 w / m 2 exhibit, preferably greater than or equal to 2·10 6 w / m 2 , preferably of greater than or equal to 4·10 6 w / m 2 and especially preferably of 8·10 6 w / m 2According to a preferred embodiment, an induction heating device can have a nominal power density of greater than or equal to 4 × 10⁻⁶. 6 w / m 2 and less than or equal to 8·10 6 w / m 2 exhibiting. According to a preferred embodiment, an induction heating device can have a nominal power density of greater than or equal to 2·10 7 w / m 2 exhibit.

[0043] The use of an induction heating device as the heating medium offers the advantage that the nominal power density is independent of the ambient temperature of the metallic workpiece. This is particularly advantageous when heating the metallic workpiece at high outlet temperatures. Furthermore, the use of an induction heating device allows for the heating of metallic workpieces with lower carbon emissions. These carbon emissions can include carbon dioxide, carbon monoxide, and / or other carbon-oxygen compounds.

[0044] The induction heating device can have two coils. Preferably, the two coils are arranged opposite each other with respect to a conveying plane of the metallic workpiece.

[0045] The conveying plane of the metallic workpiece is preferably the plane in which the metallic workpiece is conveyed in the conveying direction. The conveying plane is preferably defined by the conveying direction and a transverse direction, preferably a direction in the direction of the width of the metallic workpiece.

[0046] The induction heating device can be configured to generate a longitudinal magnetic field and / or a transverse magnetic field.

[0047] A DFI module is preferably a heating medium configured to apply a Direct Flame Impingement (DFI) process for heating the metallic workpiece. The DFI process is also known as an oxyfuel process. In the DFI process, at least one oxy-fuel flame or one oxygen flame heats the metallic workpiece directly, in particular by direct contact with the workpiece, preferably with a surface of the workpiece. The nominal power density achievable with the DFI process can be up to ten times higher than that of conventional fuel-fired furnaces. A nominal power density of a DFI module can be 1 × 10 5 w / m 2 to reach, preferably 2·10 5 w / m 2 , preferably 5·10 5 w / m 2 and especially preferred 1·10 6 w / m 2 .

[0048] The first temperature change module and / or the second temperature change module may have a plurality of DFI modules, in particular two DFI modules, three DFI modules, four DFI modules, five DFI modules or more than five DFI modules.

[0049] This plurality of DFI modules can be arranged in a common housing, for example, a furnace housing. Alternatively, the plurality of DFI modules can have separate housings, in particular furnace housings, which are arranged successively along the conveying direction of the metallic workpiece.

[0050] A flameless porous burner is preferably a heating element designed to heat a metallic workpiece by thermal radiation and / or convection. In a flameless porous burner, combustion takes place in an open flame within a porous, high-temperature ceramic. The high-temperature ceramic, glowing from the combustion process, radiates heat towards the metallic workpiece and can simultaneously serve as a hot air source, allowing for additional heat transfer through convection. The nominal power density of a flameless porous burner can be 1 × 10⁻⁶ 6 w / m 2 to reach.

[0051] The first temperature change module and / or a heating element of the first temperature change module can be movably mounted transversely to the conveying direction of the metallic workpiece. For example, the first temperature change module and / or a heating element of the first temperature change module can be displaced transversely to the conveying direction of the metallic workpiece.

[0052] This allows the metallic workpiece to be heated more precisely by adding or removing the first temperature change module and / or a heating element of the first temperature change module.

[0053] A control device is preferably an electronic component. The control device is preferably configured to receive, process, and / or transmit electrical signals. These electrical signals may contain information about the temperatures of the metallic workpiece, in particular surface temperatures, core temperatures, and / or mean temperatures. The electrical signals may also include control signals, in particular control signals for controlling the first and / or second temperature change module.

[0054] The control unit can be data-connected to the first temperature change module and / or the second temperature change module. The control unit can be data-connected to one or more measuring devices, for example, a temperature measuring device. The temperature measuring device is preferably configured to measure the surface temperature of the metallic workpiece. The temperature measuring device can also be configured to measure the surface temperature distribution of the metallic workpiece, preferably a surface temperature distribution along the width of the metallic workpiece. The temperature measuring device is preferably configured to transmit the measured temperatures to the control unit at regular intervals, preferably via electrical signals, or alternatively by means of a wireless communication link.

[0055] For example, the control device is configured to receive electrical signals from the temperature measuring device, wherein these electrical signals contain information about the temperature of the metallic workpiece, preferably the surface temperature, and to control the first and / or the second temperature change module based on these received electrical signals, preferably by sending electrical signals to the temperature change modules, such that the first outlet temperature of the metallic workpiece corresponds to the first setpoint and / or that the second outlet temperature of the metallic workpiece corresponds to the second setpoint.

[0056] The rolling temperature of the metallic workpiece can be a predetermined value. For example, the rolling temperature can be stored in a data table. The rolling temperature of the metallic workpiece can be determined based on the alloy composition of the workpiece, one or more target parameters of a forming process (e.g., a specific microstructure and / or grain size), and other parameters such as a conveying speed, a rolling speed, and / or a casting temperature of the metallic workpiece.

[0057] The control and regulation device is preferably designed to determine the rolling temperature by receiving a rolling temperature, for example through an operator input at an operator interface.

[0058] The control device is preferably configured to determine the rolling temperature, preferably from a previously described data table. In particular, the control device is configured to determine the rolling temperature by interpolation between several values ​​for the rolling temperature stored in such a data table.

[0059] The rolling temperature is preferably a mean temperature of the metallic workpiece. Alternatively or additionally, the rolling temperature can include a surface temperature and / or a core temperature.

[0060] The first target value for the first exit temperature of the metallic workpiece can be greater than or equal to the rolling temperature.

[0061] The control and regulation device can additionally or alternatively determine the first setpoint depending on at least one of the following factors: - a conveying speed of the metallic workpiece, particularly after leaving the first and / or the second temperature change module; and / or - an ambient temperature after leaving the first and / or the second temperature change module; and / or - a second setpoint for a second outlet temperature of the metallic workpiece; and / or - an initial running-in temperature of the metallic workpiece; and / or - a second entry temperature of the metallic workpiece; and / or - a second outlet temperature of the metallic workpiece; and / or - a primary forming temperature, for example a casting temperature, of the metallic workpiece; and / or - a roller diameter of a rolling mill in a production line; and / or - a rolling state of a rolling device of a production line.

[0062] This improves the assurance that the metallic workpiece has the required rolling temperature when entering a rolling device in a production line.

[0063] The condition of a rolling mill can be determined by monitoring the roll surface temperature. For example, by means of a temperature sensor, preferably an optical temperature sensor, wherein the temperature sensor is data-connected to the control and monitoring device.

[0064] Preferably, the second temperature change module is configured to change the temperature of the metallic workpiece to a second outlet temperature, wherein the control device is configured to determine a second setpoint for the second outlet temperature of the metallic workpiece as a function of the rolling temperature, and to control the second temperature change module such that the second outlet temperature of the metallic workpiece corresponds to the second setpoint.

[0065] A device designed in this way has the advantage that a required rolling temperature of the metallic workpiece can be achieved more effectively and in a targeted manner.

[0066] The control and regulation device can additionally or alternatively determine the second setpoint depending on at least one of the following factors: - a conveying speed of the metallic workpiece, especially after leaving the first and / or the second temperature change module; and / or - an ambient temperature after leaving the first and / or the second temperature change module; and / or - the first setpoint for the first outlet temperature of the metallic workpiece; and / or - an initial running-in temperature of the metallic workpiece; and / or - a second entry temperature of the metallic workpiece; and / or - an initial discharge temperature of the metallic workpiece; and / or - a primary forming temperature, for example a casting temperature of the metallic workpiece; and / or - a roller diameter of a rolling mill in a production line; and / or - a rolling state of a rolling device of a production line.

[0067] This improves the assurance that the metallic workpiece has the required rolling temperature when entering a rolling device in a production line.

[0068] The control and regulation device is preferably designed for the following purpose: - to determine a second outlet temperature of the metallic workpiece.

[0069] The control and regulation device is preferably designed for the following purpose: - to adjust the first target value for the first outlet temperature of the metallic workpiece based on the previously determined second outlet temperature.

[0070] The control and regulation device is preferably designed for the following purpose: - to determine that the rolling temperature is reached with the previously determined first setpoint of the first exit temperature and the previously determined second exit temperature.

[0071] Preferably, the first setpoint of the first outlet temperature of the metallic workpiece is greater than or equal to the second setpoint of the second outlet temperature of the metallic workpiece.

[0072] A device designed in this way has the advantage that the required rolling temperature of the metallic workpiece can be achieved with a lower amount of energy. For example, if a metallic workpiece is heated by the first temperature change module immediately after a primary forming process, preferably a continuous casting process, the temperature distribution of the metallic workpiece can be homogenized in the second temperature change module with less energy expenditure, so that the second exit temperature is lower than the first exit temperature and the required rolling temperature is still achieved.

[0073] Alternatively, the first setpoint for the first outlet temperature of the metallic workpiece can be less than or equal to the second setpoint for the second outlet temperature of the metallic workpiece.

[0074] Preferably, the first temperature change module is configured to change a core temperature of the metallic workpiece to a first core outlet temperature and / or a surface temperature of the metallic workpiece to a first surface outlet temperature, wherein the control device is configured to determine a first core setpoint for the first core outlet temperature of the metallic workpiece as a function of the rolling temperature and / or a first surface setpoint for the first surface outlet temperature of the metallic workpiece as a function of the rolling temperature, and to control the first temperature change module such that the first core outlet temperature of the metallic workpiece corresponds to the first core setpoint and / or the first surface outlet temperature of the metallic workpiece corresponds to the first surface setpoint.

[0075] A device designed in this way offers the advantage that a metallic workpiece can be heated to a required rolling temperature with particular efficiency. For example, if the core temperature of the metallic workpiece is higher than its surface temperature when entering the first temperature change module, the surface temperature of the metallic workpiece can be selectively heated using the first temperature change module, so that the temperature of the metallic workpiece reaches the required rolling temperature. Because the metallic workpiece is heated only on its surface and a predetermined penetration depth is not exceeded in order to reduce the temperature difference, less energy is required to reach the required rolling temperature compared to complete heating, i.e., heating the entire core of the metallic workpiece.

[0076] The control and regulation device can additionally or alternatively determine the first core setpoint and / or the first surface setpoint depending on at least one of the following factors: - a conveying speed of the metallic workpiece, especially after leaving the first and / or the second temperature change module; and / or - an ambient temperature after leaving the first and / or the second temperature change module; and / or - a second core setpoint for a second core outlet temperature of the metallic workpiece; and / or - a second surface setpoint for a second surface outlet temperature of the metallic workpiece; and / or - an initial running-in temperature of the metallic workpiece; and / or - a second entry temperature of the metallic workpiece; and / or - a second outlet temperature of the metallic workpiece; and / or - a primary forming temperature, for example a casting temperature of the metallic workpiece; and / or - a roller diameter of a rolling mill in a production line; and / or - a rolling state of a rolling device of a production line.

[0077] Preferably, the second temperature change module is configured to change the core temperature of the metallic workpiece to a second core outlet temperature and / or the surface temperature of the metallic workpiece to a second surface outlet temperature, wherein the control device is configured to determine a second core setpoint for the second core outlet temperature of the metallic workpiece as a function of the rolling temperature and / or a second surface setpoint for the second surface outlet temperature of the metallic workpiece as a function of the rolling temperature, and to control the second temperature change module such that the second core outlet temperature of the metallic workpiece corresponds to the second core setpoint and / or the second surface outlet temperature of the metallic workpiece corresponds to the second surface setpoint.

[0078] Such a device has the advantage that a metallic workpiece can be heated even more efficiently to a required rolling temperature.

[0079] The control and regulation device can additionally or alternatively determine the second core setpoint and / or the second surface setpoint depending on at least one of the following factors: - a conveying speed of the metallic workpiece, especially after leaving the first and / or the second temperature change module; and / or - an ambient temperature after leaving the first and / or the second temperature change module; and / or - a first core setpoint for a first core outlet temperature of the metallic workpiece; and / or - a first target surface temperature for a first surface run-off temperature of the metallic workpiece; and / or - an initial running-in temperature of the metallic workpiece; and / or - a second entry temperature of the metallic workpiece; and / or - an initial discharge temperature of the metallic workpiece; and / or - a primary forming temperature, for example a casting temperature of the metallic workpiece; and / or - a roller diameter of a rolling mill in a production line; and / or - a rolling state of a rolling device of a production line.

[0080] Preferably, the first surface setpoint of the first surface outlet temperature of the metallic workpiece is greater than or equal to the second surface setpoint of the second surface outlet temperature of the metallic workpiece.

[0081] A device designed in this way has the advantage that the required rolling temperature of the metallic workpiece can be achieved with a lower amount of energy. For example, if a metallic workpiece is heated by the first temperature change module such that the first surface runout temperature of the metallic workpiece is above the required rolling temperature and the first core runout temperature is below the required rolling temperature, the temperature distribution of the metallic workpiece can be homogenized with reduced energy expenditure using the second temperature change module, so that the second surface runout temperature is lower than the first surface runout temperature and the required rolling temperature is still achieved.

[0082] Alternatively, the first surface setpoint of the first surface outlet temperature of the metallic workpiece is less than or equal to the second surface setpoint of the second surface outlet temperature of the metallic workpiece.

[0083] The first core setpoint for the first core outlet temperature of the metallic workpiece can be greater than or equal to the second core setpoint for the second core outlet temperature of the metallic workpiece. Alternatively, the first core setpoint for the first core outlet temperature of the metallic workpiece can be less than or equal to the second core setpoint for the second core outlet temperature of the metallic workpiece.

[0084] Preferably, the device is designed such that the first temperature change module has an induction heating device and / or the second temperature change module has a heat radiator, preferably an electric heat radiator.

[0085] Such a device has the advantage that the metallic workpiece can be heated to a required rolling temperature with a further reduced amount of carbon emissions.

[0086] Preferably, the second temperature change module is configured to change the temperature of the metallic workpiece from a second inlet temperature of the metallic workpiece to the second outlet temperature, wherein the second outlet temperature is less than or equal to the second inlet temperature.

[0087] Such a device offers the advantage that a metallic workpiece can be heated to a required rolling temperature with a reduced amount of energy. Because the second outlet temperature is less than or equal to the second inlet temperature of the metallic workpiece, the second temperature change module can be operated with a significantly reduced amount of energy. For example, the second temperature change module could consist solely of passive temperature change means.

[0088] An entry temperature of the metallic workpiece is preferably the temperature that the metallic workpiece has, relative to the conveying direction, immediately upstream of a temperature change module. For example, a first entry temperature is the temperature that the metallic workpiece has, relative to the conveying direction, immediately upstream of the first temperature change module. The second entry temperature is preferably the temperature that the metallic workpiece has, relative to the conveying direction, immediately upstream of the second temperature change module. The entry temperature can comprise a mean entry temperature, a core entry temperature, and / or a surface entry temperature.

[0089] Alternatively, the second temperature change module is configured to change the temperature of the metallic workpiece from a second inlet temperature of the metallic workpiece to the second outlet temperature, where the second outlet temperature is greater than or equal to the second inlet temperature.

[0090] The first temperature change module is preferably configured to change the temperature of the metallic workpiece from a first inlet temperature of the metallic workpiece to the first outlet temperature, where the first outlet temperature is greater than or equal to the first inlet temperature.

[0091] The first entry temperature and / or the second entry temperature of the metallic workpiece can be ≤ 250 °C, preferably ≤ 200 °C, more preferably ≤ 150 °C, and particularly preferably ≤ 100 °C. The first entry temperature and / or the second entry temperature of the metallic workpiece can be ≤ 75 °C, preferably ≤ 50 °C, more preferably ≤ 35 °C, and particularly preferably ≤ 15 °C. In this case, the metallic workpiece can also be referred to as a cold entry into the device.

[0092] The first entry temperature and / or the second entry temperature of the metallic workpiece can be ≤ 600 °C, preferably ≤ 500 °C, more preferably ≤ 450 °C, and particularly preferably ≤ 400 °C. In this case, the metallic workpiece can also be described as being hot-loaded into the device. This advantageously reduces the energy consumption and emissions, especially carbon emissions, required to achieve the required rolling temperature.

[0093] The first and / or second entry temperature of the metallic workpiece can be ≥ 750 °C, preferably ≥ 900 °C, more preferably ≥ 1000 °C, and particularly preferably ≥ 1100 °C. The first and / or second entry temperature of the metallic workpiece can be ≤ 1200 °C, preferably ≤ 1050 °C, more preferably ≤ 950 °C, and particularly preferably ≤ 850 °C. In this case, the metallic workpiece can also be directly inserted into the device. This advantageously reduces the energy consumption and emissions, especially carbon emissions, for achieving the required rolling temperature.

[0094] The first outlet temperature and / or the second outlet temperature of the metallic workpiece can be ≥ 900 °C, preferably ≥ 950 °C, more preferably ≥ 1000 °C, and particularly preferably ≥ 1050 °C. Furthermore, the first outlet temperature and / or the second outlet temperature of the metallic workpiece can be ≥ 1075 °C, preferably ≥ 1125 °C, more preferably ≥ 1150 °C, and particularly preferably ≥ 1175 °C. According to a preferred embodiment, the first outlet temperature and / or the second outlet temperature of the metallic workpiece can be ≥ 1200 °C, more preferably ≥ 1225 °C, more preferably ≥ 1250 °C, and particularly preferably ≥ 1275 °C.

[0095] Preferably, the second temperature change module has at least one furnace, preferably a tunnel furnace, wherein the furnace has a furnace housing that at least partially limits a furnace volume, wherein the metallic workpiece can be conveyed through the furnace volume in the conveying direction.

[0096] Such a device offers the advantage of thermally buffering metallic workpieces. For example, if the device for the thermal treatment of a metallic workpiece is positioned between a primary forming unit, such as a continuous casting unit, and a forming unit, such as a rolling unit, the rolling process following the primary forming process can be decoupled from the production speed of the metallic workpieces by the primary forming unit. For instance, metallic workpieces exiting the primary forming unit can be received in the furnace volume of the second temperature-change module before being conveyed to the forming unit. This allows metallic workpieces to be formed at a rolling speed decoupled from the casting speed of the primary forming unit.

[0097] The furnace housing is preferably thermally insulating from the environment. The furnace volume bounded by the furnace housing can comprise several sub-volumes. The furnace volume, or a sub-volume thereof, can be assigned to the second temperature change module or to a heating element of the second temperature change module.

[0098] More than one heating element can be arranged within the furnace volume. For example, an electric radiant heater, a flameless porous burner, a gas burner, and / or a DFI module can be arranged within the furnace volume. An induction heating device can also be arranged within the furnace volume. Several heating elements can be arranged sequentially within the furnace volume in the direction of conveyance.

[0099] The partial volumes of the furnace volume can be separated from each other, at least temporarily, by a thermal separation device. The thermal separation device can include a gate and / or a door, or be designed as such.

[0100] The composition of the furnace atmosphere within the furnace volume can be adjusted. For example, the carbon content, nitrogen content, oxygen content, and / or sulfur content of the furnace atmosphere can be adjusted. The components of the furnace atmosphere can be specified and adjusted as volume percentages.

[0101] The furnace can be designed as a walking beam furnace, a roller furnace, or a pusher furnace.

[0102] Preferably, the first temperature change module is arranged outside the furnace volume.

[0103] Such a device offers the advantage of improved flexibility in integrating it into existing production facilities. Furthermore, temperature-sensitive components of the first temperature change module, such as a coil, can be protected from the temperatures of an oven volume or a sub-volume.

[0104] Alternatively, the first temperature change module can be arranged inside, preferably completely inside, the oven volume.

[0105] Preferably, the first temperature change module is arranged at least partially within the oven volume.

[0106] Such a device offers the advantage that it can be further improved and flexibly integrated into existing production facilities. Furthermore, energy, preferably thermal energy, can be introduced more precisely into the metallic workpiece.

[0107] For example, a first coil of the first temperature change module can be arranged in a furnace volume, preferably in the furnace volume of the second temperature change module, and a second coil of the first temperature change module can be arranged outside the furnace volume. The first coil can, for example, be arranged such that it is configured to heat a top side of the metallic workpiece. The second coil can, for example, be arranged such that it is configured to heat a bottom side of the metallic workpiece.

[0108] Preferably, the first temperature change module is arranged directly adjacent to the second temperature change module with respect to the conveying direction.

[0109] A device designed in this way has the advantage that heat loss from a metallic workpiece between the first temperature change module and the second temperature change module is reduced, and the device can simultaneously be arranged in a space-saving manner in a production line.

[0110] In particular, no further temperature change module or treatment device is arranged between two temperature change modules that are directly adjacent to each other. In other words, two temperature change modules arranged directly adjacent to each other with respect to the conveying direction follow each other directly in the conveying direction.

[0111] Alternatively, the first temperature change module can be arranged at a distance from the second temperature change module with respect to the conveying direction.

[0112] The measuring device, in particular the temperature measuring device, can be arranged between the first and second temperature change modules with respect to the conveying direction. The measuring device can also be designed as a thickness measuring device. The measuring device can be arranged between two immediately adjacent temperature change modules.

[0113] The measuring device can furthermore be arranged within the operating range of a temperature change module. An operating range of a temperature change module is the area in which the temperature change module interacts with the metallic workpiece, preferably to change the temperature of the metallic workpiece. For example, the operating range of a temperature change module comprising a furnace is the furnace volume or a partial volume thereof.

[0114] Preferably, the first temperature change module is arranged before or after the second temperature change module with respect to the conveying direction.

[0115] If the first temperature change module is positioned downstream of the second temperature change module (relative to the conveying direction), the device offers the advantage, when used in a production line for metallic workpieces, that heat loss between the first temperature change module and a treatment unit located downstream of the first temperature change module (relative to the conveying direction) is minimized. If the first temperature change module is positioned upstream of the second temperature change module (relative to the conveying direction), the device offers the advantage, when used in a production line for metallic workpieces, that an increased amount of energy can be introduced into the metallic workpiece per unit of installed rated power.In this case, the first temperature change module is preferably arranged before an increase in the conveying speed, for example immediately after a primary forming device.

[0116] The device may have a third temperature change module, wherein the third temperature change module is arranged upstream or downstream of the first temperature change module with respect to the conveying direction. The third temperature change module may be arranged upstream or downstream of the second temperature change module with respect to the conveying direction. The third temperature change module may have a nominal power density of ≥ 2·10 4 w / m 2 , ≥ 9·10 4 w / m 2 , ≥ 1·10 5 w / m 2 , ≥ 2·10 5 w / m 2 , ≥ 3.5·10 5 w / m 2 , ≥ 5·10 5 w / m 2 , ≥ 7·10 5 w / m 2 , ≥ 8.5·10 5 w / m 2 , ≥ 1·10 6 w / m 2or ≥ 2·10 6 w / m 2 exhibit.

[0117] The third temperature change module can include one or more passive temperature change devices and / or one or more active temperature change devices.

[0118] The third temperature change module and / or a heating element of the third temperature change module can be movably mounted transversely to the conveying direction of the metallic workpiece. For example, the third temperature change module and / or a heating element of the third temperature change module can be displaced transversely to the conveying direction of the metallic workpiece.

[0119] The problem underlying the invention is further solved by a production line for manufacturing and / or processing a metallic workpiece, wherein the production line comprises a first treatment unit for treating the metallic workpiece and a second treatment unit for treating the metallic workpiece, the first treatment unit being spaced apart from the second treatment unit with respect to a conveying direction of the metallic workpiece, and preferably the second treatment unit being designed as a rolling unit. The production line further comprises a conveying device for conveying the metallic workpiece in the conveying direction from the first treatment unit to the second treatment unit, and a previously described device, wherein the device is arranged between the first treatment unit and the second treatment unit with respect to the conveying direction.

[0120] Such a production line offers the advantage that the temperature of the metallic workpiece can be precisely set to the required forming temperature before forming, while simultaneously increasing energy efficiency in achieving this temperature. A high-power-density initial temperature control module allows a large amount of energy to be introduced into the workpiece within a short time and over a short conveying distance, thus increasing its temperature. This process can create temperature differences between the surface and core temperatures of the workpiece.By using a second temperature change module to reduce these temperature differences of the metallic workpiece, a sufficiently homogeneous temperature distribution required for forming can be achieved. This improves the precise temperature control of the metallic workpiece.

[0121] A processing device can be configured to process a metallic workpiece. In particular, a processing device can be designed as a forming device, preferably a pressure forming device. In a pressure forming device, a metallic workpiece is formed by compressive forces. A pressure forming device can be a rolling device. A rolling device can have at least one rolling stand. Preferably, a rolling device has more than one rolling stand, for example, 2, 3, 4, or more rolling stands. The rolling stands are preferably arranged one behind the other with respect to the conveying direction. Advantageously, a metallic workpiece with a starting thickness of greater than or equal to 5 mm is pressure formed, in particular rolled, preferably with a starting thickness of greater than or equal to 10 mm, and particularly preferably with a starting thickness of greater than or equal to 30 mm.

[0122] The processing device can further be configured as a tensile forming device, wherein the tensile forming device is configured to deform the metallic workpiece by tensile forces. A tensile forming device can be a stretching device, in particular a stretching device for improving the flatness of the metallic workpiece. Advantageously, a metallic workpiece with a starting thickness of less than or equal to 12 mm is tensile formed, in particular stretched, preferably with a starting thickness of less than or equal to 10 mm, and particularly preferably with a starting thickness of less than or equal to 5 mm.

[0123] A treatment facility, in particular the first treatment facility, can be designed as a primary forming facility, in particular a continuous casting facility.

[0124] A conveyor system is preferably designed for transporting a metallic workpiece, in particular for transporting slabs or metal strips. Preferably, a conveyor system includes a roller conveyor, especially an electrically driven roller conveyor. The roller conveyor may include sections with roller conveyor cooling.

[0125] A conveying system can have several different segments, in particular a first segment between a first temperature change module and a second temperature change module, and a second segment between a second temperature change module and a treatment unit. It is understood that a conveying system can also have further segments between components of the device and / or the production line.

[0126] Furthermore, a conveying device can be set up to convey a metallic workpiece from a second temperature change module to a first temperature change module.

[0127] It should be noted that the advantages of the device described above extend directly to a production line for the manufacture and / or processing of a metallic workpiece. It should be expressly pointed out that the device described above can be advantageously combined with the components of the production line described above, either individually or cumulatively in any combination.

[0128] Preferably, the production line is designed such that the production line has a production control device; the first treatment device is designed as a forming device, and the production control device is configured to operate the production line in a first production mode in which the first treatment device and the second treatment device form the metallic workpiece at least temporarily and simultaneously.

[0129] The production control device is preferably an electronic component. The production control device is preferably configured to receive, process, and / or transmit signals, preferably electrical signals.

[0130] The production control device is preferably data-connected to the first and / or the second treatment device and / or to the first and / or the second temperature change module, preferably by means of a wireless communication link.

[0131] Preferably, the production line is designed such that the production line has a production control device; the first treatment device is designed as a forming device, and the production control device is configured to operate the production line in a second production mode in which the second treatment device forms the metallic workpiece after a forming process by the first treatment device.

[0132] In other words, the first and second treatment devices preferably do not reshape the metallic workpiece simultaneously in the second production mode.

[0133] A production line designed in this way offers the advantage that a metallic workpiece can be rolled at different speeds in the first and second processing units. The resulting complete decoupling of the rolling steps between the two processing units increases flexibility during the manufacturing of the metallic workpiece.

[0134] The production control device is preferably designed to transfer the production line between the first production mode and the second production mode.

[0135] Preferably, the production line is configured to include a production control device; the first treatment device is configured as a primary forming device, wherein the primary forming device is configured to continuously produce a metallic workpiece; and wherein the production control device is configured to operate the production line in a third production mode, in which the first treatment device continuously produces the metallic workpiece and the second treatment device at least temporarily forms the metallic workpiece simultaneously.

[0136] Such a production line has the advantage that metallic workpieces can be manufactured with a significantly thinner thickness.

[0137] Preferably, the production line is configured such that the production control device is set up to operate the production line in a fourth production mode in which the second treatment device transforms the metallic workpiece after a continuous production of the metallic workpiece by the first treatment device, and that the production control device is set up to transfer the production line between the third production mode and the fourth production mode.

[0138] A production line designed in this way has the advantage that it offers increased flexibility with regard to the metallic workpieces to be manufactured.

[0139] In a particularly preferred embodiment, the production line includes a third processing unit, which is a forming unit, preferably a rolling unit. The third processing unit is preferably arranged downstream of the second processing unit with respect to the conveying direction. Preferably, in the third production mode of the production line, the second and third processing units simultaneously form the metallic workpiece at least temporarily while it is being continuously produced by the first processing unit.

[0140] Preferably, in the fourth production mode, the third treatment unit reshapes the metallic workpiece after it has been reshaped by the second treatment unit. In other words, the second and third treatment units do not preferably reshape the metallic workpiece simultaneously in the fourth production mode.

[0141] The problem underlying the invention is further solved by a method for thermally treating a metallic workpiece conveyed in a conveying direction, preferably with a previously described device or a previously described production line, wherein the method comprises the following steps: - Determining the rolling temperature of the metallic workpiece; - Determining an initial target value for the initial outlet temperature of the metallic workpiece as a function of the rolling temperature; and - Changing the initial outlet temperature of the metallic workpiece to the initial target value of the initial outlet temperature.

[0142] Such a process has the advantage that the metallic workpiece can be heated to a specific rolling temperature with a reduced amount of energy and reduced carbon emissions.

[0143] Determining a rolling temperature can include receiving a rolling temperature, for example through operator input at an operator interface.

[0144] Changing the first outlet temperature of the metallic workpiece can be achieved by controlling a temperature change module, preferably the first temperature change module of the device described above.

[0145] The procedure may include the following step: - Determining a second outlet temperature of the metallic workpiece.

[0146] Determining the second discharge temperature can involve calculating the temperature profile of the metallic workpiece during a temperature change using the second temperature change module. For example, determining the second discharge temperature can involve calculating the temperature profile of the metallic workpiece during conveying it through a furnace using the second temperature change module.

[0147] The calculation can be based on a mathematical process model. This mathematical process model can include a transient energy balance around the metallic workpiece. For example, thermal radiation and convection can be considered for energy input into and output from the metallic workpiece. Furthermore, volume source terms, particularly within the metallic workpiece, can be considered for inductive heating of the workpiece. The mathematical process model can be solved discretely, especially using a finite element method and / or a finite difference method. Alternatively, the calculation can be based on empirical data stored in data tables.

[0148] Determining the first target value for the first outlet temperature can additionally be done depending on the second outlet temperature of the metallic workpiece.

[0149] The procedure may include the following step: - Adjusting the first setpoint for the first outlet temperature of the metallic workpiece based on the previously determined second outlet temperature.

[0150] The procedure may include the following step: - Determine that the rolling temperature is reached with the previously determined first setpoint of the first exit temperature and the previously determined second exit temperature.

[0151] The process may include the following steps: - Primary forming, preferably continuous casting, of the metallic workpiece; - Forming, preferably pressure forming, preferably rolling of the metallic workpiece.

[0152] It should be noted that the advantages of a previously described device and / or a previously described production line extend directly to a method for the thermal treatment of a metallic workpiece conveyed in a conveying direction. It should be expressly pointed out that the object of the previously described device can be advantageously combined with the objects of the previously described production line and the previously described method, either individually or cumulatively in any combination.

[0153] The problem underlying the invention is further solved by using a previously described device for the thermal treatment of a metallic workpiece.

[0154] The problem underlying the invention is further solved by using a previously described production line for the manufacture and / or processing of a metallic workpiece.

[0155] Further advantages, details and features of the invention will become apparent from the exemplary embodiments described below.

[0156] Specifically, they show: Fig. 1: a schematic representation of a device according to a first embodiment and a temperature profile of a metallic workpiece which is thermally treated by means of the device according to the first embodiment; Fig. 2: a schematic representation of a device according to a second embodiment and a temperature profile of a metallic workpiece which is thermally treated by means of the device according to the second embodiment; and Fig. 3: a schematic representation of a production line according to a third embodiment.

[0157] In the following description, identical reference numerals denote identical components or identical features, so that a description of a component given in relation to one figure also applies to the other figures, thus avoiding repetitive descriptions. Furthermore, individual features described in connection with one embodiment can also be used separately in other embodiments.

[0158] Fig. Figure 1 shows a schematic representation of a device 1 for the thermal treatment of a metallic workpiece 2 conveyed in a conveying direction R1 and a temperature profile of the metallic workpiece 2 which is thermally treated by means of the device 1 according to the first embodiment.

[0159] The device 1 has a first temperature change module 10 and a second temperature change module 20, wherein the first temperature change module 10 has a higher nominal power density than the second temperature change module 20 and is configured to reduce a temperature T of the metallic workpiece 2 to a first outlet temperature T A1 to change, wherein the second temperature change module 20 is configured to reduce a temperature difference between a surface temperature of the metallic workpiece 2 and a core temperature of the metallic workpiece 2 to ≤ 50 °C. The device 1 has a control unit 30 which is data-connected to the first temperature change module 10 and the second temperature change module 20. The control unit 30 is configured to determine a rolling temperature T Wof the metallic workpiece 2; a first setpoint for the first outlet temperature T A1 of the metallic workpiece 2 as a function of the rolling temperature T W to determine; and to control the first temperature change module 10 such that the first outlet temperature T A1 of the metallic workpiece 2 corresponds to the first target value.

[0160] The first temperature change module 10 is arranged downstream of the second temperature change module 20 with respect to the conveying direction R1. Furthermore, the first temperature change module 10 is arranged directly adjacent to the second temperature change module 20.

[0161] The first temperature change module 10 is further configured to change the temperature T of the metallic workpiece 2 from a first inlet temperature T E1 to the first outlet temperature T A1 to change the first outlet temperature T A1greater than the first inlet temperature T E1 The second temperature change module 20 is configured to change the temperature T of the metallic workpiece 2 from a second inlet temperature T. E2 to a second outlet temperature T A2 to change the second outlet temperature T A2 smaller than the second inlet temperature T E2 is. Finally, the first outlet temperature T A1 greater than the second outlet temperature T A2 of the metallic workpiece 2 and as the rolling temperature T W of the metallic workpiece 2.

[0162] Fig. Figure 2 shows a schematic representation of a device 1 for the thermal treatment of a metallic workpiece 2 conveyed in a conveying direction R1 according to a second embodiment, and a temperature profile of the metallic workpiece 2 which is thermally treated by means of the device 1 according to the second embodiment. The device 1 has a first temperature change module 10 and a second temperature change module 20, wherein the first temperature change module 10 is arranged upstream of the second temperature change module 20 with respect to the conveying direction R1.

[0163] Fig. Figure 3 shows a schematic representation of a production line 100 for the manufacture of a [product / item] in Fig. 3 metallic workpiece 2 not shown according to a third embodiment. The production line 100 has a first treatment unit 40 designed as a continuous casting unit 41 and a forming unit 50 designed as a rolling unit 51. The continuous casting unit 41 is spaced apart from the rolling unit 51 with respect to the conveying direction R1 and is arranged upstream of the rolling unit 51. The production line 100 further has a Fig. 3. Funding institution not shown, for the promotion of the also in Fig. 3 metallic workpiece 2 (not shown) from the continuous casting device 41 to the rolling device 51. Finally, the production line 100 has a first device 1 according to the first embodiment, which is arranged between the continuous casting device 41 and the rolling device 51 with respect to the conveying direction R1.

[0164] Production line 100 further comprises a third treatment unit 60, which is designed as a rolling unit 61 and is arranged downstream of the rolling unit 51 with respect to the conveying direction R1. Production line 100 also comprises a second device 1 according to the second embodiment, which is arranged between the rolling unit 51 and the rolling unit 61. Finally, production line 100 comprises a winding unit 70 for winding the metallic workpiece 2 produced by production line 100. Reference symbol list 1 (first / second) device 2. Metallic workpiece 10 First temperature change module 20 Second temperature change module 30 Control and regulation device 40 First treatment facility 41 Continuous casting equipment 50 Second treatment facility 51 Rolling device 60 Third Treatment Facility 61 Rolling machine 70 Winding device 100 production line R1 Conveyor direction T Temperature of the metallic workpiece T A1 First discharge temperature of the metallic workpiece T A2 Second outlet temperature of the metallic workpiece T W Rolling temperature of the metallic workpiece T E1 Initial running-in temperature of the metallic workpiece T E2 Second entry temperature of the metallic workpiece

Claims

[1] Device (1) for the thermal treatment of a metallic workpiece (2) conveyed in a conveying direction (R1) of a production line (100) comprising a rolling device (51, 61), comprising: - a first temperature change module (10) and a second temperature change module (20), wherein the first temperature change module (10) has a higher nominal power density than the second temperature change module (20) and is configured to reduce a temperature (T) of the metallic workpiece (2) to a first outlet temperature (T A1 ) to change; - wherein the second temperature change module (20) is configured to reduce a temperature difference between a surface temperature of the metallic workpiece and a core temperature of the metallic workpiece to ≤ 50 °C, preferably to ≤ 30 °C, more preferably to ≤ 20 °C and particularly preferably to ≤ 10 °C; and - a regulating and controlling device (30) designed to: - a rolling temperature (T W ) of the metallic workpiece (2); - a first target value for the first outlet temperature (T A1 ) of the metallic workpiece (2) as a function of the rolling temperature (T W ) to determine; and - to control the first temperature change module (10) such that the first outlet temperature (T A1 ) of the metallic workpiece (2) corresponds to the first target value. [2] Device (1) according to claim 1, characterized by , that: - the second temperature change module (20) is configured to change the temperature (T) of the metallic workpiece (2) to a second outlet temperature (T A2 ) to change; and - wherein the regulating and control device (30) is set up for this purpose: - a second setpoint for the second outlet temperature (T A2) of the metallic workpiece (2) as a function of the rolling temperature (T W ) to determine; and - to control the second temperature change module (20) such that the second outlet temperature (T A2 ) of the metallic workpiece (2) corresponds to the second target value. [3] Device (1) according to claim 2, characterized by , that the first setpoint of the first outlet temperature (T A1 ) of the metallic workpiece (2) greater than or equal to the second setpoint of the second outlet temperature (T A2 ) of the metallic workpiece (2). [4] Device (1) according to any one of the preceding claims, characterized by , that: - the first temperature change module (10) is configured to change a core temperature of the metallic workpiece (2) to a first core outlet temperature and / or a surface temperature of the metallic workpiece (2) to a first surface outlet temperature; and - wherein the regulating and control device (30) is set up for this purpose: - a first core setpoint for the first core exit temperature of the metallic workpiece (2) as a function of the rolling temperature (T W ) and / or a first surface setpoint for the first surface run-out temperature of the metallic workpiece (2) as a function of the rolling temperature (T W ) to determine; and - to control the first temperature change module (10) such that the first core outlet temperature of the metallic workpiece (2) corresponds to the first core setpoint and / or the first surface outlet temperature of the metallic workpiece (2) corresponds to the first surface setpoint. [5] Device (1) according to claim 4, characterized by , that: - the second temperature change module (20) is configured to change the core temperature of the metallic workpiece (2) to a second core outlet temperature and / or the surface temperature of the metallic workpiece (2) to a second surface outlet temperature; and - wherein the regulating and control device (30) is set up for this purpose: - a second core setpoint for the second core exit temperature of the metallic workpiece (2) as a function of the rolling temperature (T W ) and / or a second surface setpoint for the second surface run-out temperature of the metallic workpiece (2) as a function of the rolling temperature (T W ) to determine; and - to control the second temperature change module (20) such that the second core outlet temperature of the metallic workpiece (2) corresponds to the second core setpoint and / or the second surface outlet temperature of the metallic workpiece (2) corresponds to the second surface setpoint. [6] Device (1) according to claim 5, characterized by , that the first surface setpoint of the first surface outlet temperature of the metallic workpiece (2) is greater than or equal to the second surface setpoint of the second surface outlet temperature of the metallic workpiece (2). [7] Device (1) according to any one of the preceding claims, characterized by , that: - the first temperature change module (10) has an induction heating device; and / or - the second temperature change module (20) has a heat radiator, preferably an electric heat radiator. [8] Device (1) according to any one of claims 2 to 7, characterized by , that the second temperature change module (20) is configured to change the temperature (T) of the metallic workpiece (2) starting from a second inlet temperature (T E2 ) of the metallic workpiece (2) to the second discharge temperature (T A2 ) to change the second outlet temperature (T A2 ) less than or equal to the second inlet temperature (T E2 ) is. [9] Device (1) according to one of the preceding claims, wherein the second temperature change module (20) has at least one furnace, preferably a tunnel furnace, wherein the furnace has a furnace housing that at least partially limits a furnace volume, wherein the metallic workpiece (2) can be conveyed through the furnace volume in the conveying direction (R1). [10] Device (1) according to claim 9, wherein the first temperature change module (10) is arranged outside the oven volume. [11] Device (1) according to claim 9, wherein the first temperature change module (10) is arranged at least partially within the oven volume. [12] Device (1) according to one of the preceding claims, wherein the first temperature change module (10) is arranged directly adjacent to the second temperature change module (20) with respect to the conveying direction (R1). [13] Device (1) according to one of the preceding claims, wherein the first temperature change module (10) is arranged in front of or behind the second temperature change module (20) with respect to the conveying direction (R1). [14] Production line (100) for the manufacture and / or processing of a metallic workpiece (2), comprising: - a first treatment device (40) for treating the metallic workpiece (2) and a second treatment device (50) for treating the metallic workpiece, wherein the first treatment device (40) is arranged spaced apart from the second treatment device (50) with respect to a conveying direction (R1) of the metallic workpiece (2), wherein preferably the second treatment device (50) is designed as a rolling device (51); - a conveying device for conveying the metallic workpiece (2) in the conveying direction (R1) from the first treatment unit (40) to the second treatment unit (50); and - a device (1) according to one of the preceding claims, wherein the device (1) is arranged between the first treatment unit (40) and the second treatment unit (50) with respect to the conveying direction (R1). [15] Production line (100) according to claim 14, characterized by , that: - the production line (100) has a production control device; - the first treatment unit (40) is designed as a transformer unit; and - wherein the production control device is set up to operate the production line (100) in a first production mode in which the first treatment device (40) and the second treatment device (50) reshape the metallic workpiece (2) at least temporarily, simultaneously. [16] Production line (100) according to claim 14 or 15, characterized by , that: - the production line (100) has a production control device; - the first treatment unit (40) is designed as a transformer unit; and - wherein the production control device is set up to operate the production line (100) in a second production mode in which the second treatment device (50) reforms the metallic workpiece (2) after a reshaping by the first treatment device (40). [17] Production line (100) according to claim 14, characterized by , that: - the production line (100) has a production control device; - the first treatment unit (40) is designed as a primary forming unit, wherein the primary forming unit is configured to continuously produce a metallic workpiece (2); - wherein the production control device is configured to operate the production line (100) in a third production mode in which the first treatment device (40) continuously produces the metallic workpiece (2) and the second treatment device (50) at least temporarily transforms the metallic workpiece (2) simultaneously. [18] Production line (100) according to claim 17, characterized by , that: - the production control device is configured to operate the production line (100) in a fourth production mode in which the second treatment device (50) transforms the metallic workpiece (2) after a continuous production of the metallic workpiece (2) by the first treatment device (40); and - the production control device is set up to transfer the production line (100) between the third production mode and the fourth production mode. [19] Method for thermally treating a metallic workpiece (2) conveyed in a conveying direction (R1), preferably with a device (1) according to one of claims 1 to 13 or with a production line (100) according to one of claims 14 to 18, wherein the method comprises the following steps: - Determining a rolling temperature (T W ) of the metallic workpiece (2); - Determining an initial setpoint for an initial outlet temperature (T A1 ) of the metallic workpiece (2) as a function of the rolling temperature (T W ); and - Changing the initial outlet temperature (T A1 ) of the metallic workpiece (2) to the first setpoint of the first outlet temperature (T A1 ). [20] Use of a device (1) according to any one of claims 1 to 13 for the thermal treatment of a metallic workpiece (2). [21] Use of a production line according to any one of claims 14 to 18 for the manufacture and / or processing of a metallic workpiece (2).

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