EP4214010B1 - Procédé et appareil de pulvérisation pour le traitement thermique de surface d'un produit métallique - Google Patents

Procédé et appareil de pulvérisation pour le traitement thermique de surface d'un produit métallique Download PDF

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Publication number
EP4214010B1
EP4214010B1 EP21772737.9A EP21772737A EP4214010B1 EP 4214010 B1 EP4214010 B1 EP 4214010B1 EP 21772737 A EP21772737 A EP 21772737A EP 4214010 B1 EP4214010 B1 EP 4214010B1
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EP
European Patent Office
Prior art keywords
metallic product
cooling nozzles
group
spray device
cooling
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
EP21772737.9A
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German (de)
English (en)
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EP4214010A1 (fr
Inventor
Dirk Letzel
Uwe Plociennik
Volker Mers
Axel Stavenow
Ina HÜLLEN
Harminder Singh
Ingo OLGEMÖLLER
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SMS Group GmbH
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SMS Group GmbH
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Publication of EP4214010A1 publication Critical patent/EP4214010A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
    • B22D11/225—Controlling or regulating processes or operations for cooling cast stock or mould for secondary cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
    • B22D11/1246—Nozzles; Spray heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
    • B22D11/1243—Accessories for subsequent treating or working cast stock in situ for cooling by using cooling grids or cooling plates

Definitions

  • the invention relates to a method for the thermal surface treatment of a metallic product according to the preamble of claim 1, and a spray device provided for this purpose according to the preamble of claims 21, 22 and 27.
  • a steel product treated in this way has increased strength and toughness with a preferred structure including a significant proportion of fine-grained bainite.
  • Further processes and devices for thermal surface treatment of a metallic product are also from the documents WO 00/03042 A1 , EP 3 184 202 A1 and WO 2012/069234 A1 known.
  • the invention is based on the object of optimizing the production of a metallic product with regard to its thermal surface treatment in order to be able to influence a resulting material or microstructure of the metallic product.
  • the invention provides a method for the thermal surface treatment of a metallic product, in particular in the form of a casting strand or a slab formed therefrom, in which the metallic product is moved in a transport direction through a treatment section of a spray device equipped with cooling nozzles and cooling fluid is passed through the cooling nozzles of the spray device is applied to the surfaces of the metallic product.
  • the metallic product has - viewed in the transport direction of the metallic product - a front section and a trailing rear section. When performing this process, the rear portion of the metallic product is cooled more than the front portion of the metallic product.
  • the cooling nozzles are arranged at least in a first group and in a second group. It is provided here that the second group of cooling nozzles - viewed in the transport direction of the metallic product - is arranged downstream of the first group of cooling nozzles.
  • the cooling nozzles are connected to at least one frequency-controlled pump for supplying cooling fluid, with which the cooling fluid is conveyed to the cooling nozzles with a predetermined amount and a predetermined pressure. It can be provided here that separate frequency-controlled pumps are provided for the first group of cooling nozzles and for the second group of cooling nozzles.
  • the first and second groups of cooling nozzles are fed with cooling fluid by only one central frequency-controlled pump, with at least one control valve being provided in a line between the frequency-controlled pump and the cooling nozzles of the first and second groups, respectively in which a targeted amount of water and/or a predetermined pressure can be set for the cooling nozzles of the first or second group in relation to the cooling fluid.
  • the present invention also provides a spray device for the thermal surface treatment of a metallic product, in particular in the form of a casting strand or a slab formed therefrom, comprising a treatment section with an inlet area and an outlet area, the metallic product being sprayed along the treatment section from the inlet area in the direction of the outlet area can be moved in a transport direction, and a plurality of cooling nozzles, from each of which a cooling fluid can be applied to the surfaces of the metallic product.
  • the cooling nozzles are arranged at least in a first group and in a second group, with the second group of cooling nozzles - seen in the transport direction of the metallic product - downstream of the first group Cooling nozzles are arranged.
  • the cooling nozzles of the first group and the cooling nozzles of the second group are each connected to separate frequency-controlled pumps. With these respective frequency-controlled pumps, a predetermined quantity and/or a predetermined pressure for the cooling nozzles of the first group or for the cooling nozzles of the second group can be set, preferably regulated, with respect to the cooling fluid.
  • An alternative embodiment of the invention which has an independent meaning, provides a spray device for the thermal surface treatment of a metallic product, in particular in the form of a casting strand or a slab formed therefrom, comprising a treatment section with an inlet area and an outlet area, the metallic product being sprayed along the treatment section which can be moved in the direction of the outlet area in a transport direction, and a plurality of cooling nozzles, from each of which a cooling fluid can be applied to the surfaces of the metallic product.
  • the cooling nozzles are arranged at least in a first group and in a second group, with the second group of cooling nozzles - viewed in the transport direction of the metallic product - being arranged downstream of the first group of cooling nozzles.
  • the cooling nozzles of the first group and the cooling nozzles of the second group are connected to at least one frequency-controlled pump, with at least one control valve being provided in a line between the frequency-controlled pump and the cooling nozzles of the first and second groups, with which the cooling fluid is connected a quantity of water and/or a pressure for the cooling nozzles of the first or second group is adjustable, preferably controllable.
  • a control device is provided with which the frequency-controlled pump, or the frequency-controlled pumps, and / or the control valve is or are in signal connection.
  • process parameters of the metallic product may include the temperature upstream and/or downstream of the spray device, the temperature at the top and/or bottom, and/or a ferrite content that was measured downstream of the spray device.
  • the invention is based on the essential finding that the metallic product, which can be a continuous or endless casting strand or an isolated slab formed from it, is cooled unevenly with respect to its longitudinal extent. Specifically, in the method according to the invention, this occurs in such a way that the rear section of the metallic product - viewed in the transport direction of the metallic product - is cooled more strongly than its front section, with the result that in between the front and rear sections of the Metallic product extending length range of the metallic product a targeted microstructure is achieved, namely an essentially uniform ferrite proportion.
  • the cooling nozzles are arranged at least in a first group and in a second group, whereby these groups of cooling nozzles - seen in the transport direction of the metallic product - can each be fed with different amounts of cooling fluid.
  • This is achieved either by a suitable control of the separate frequency-controlled pumps to which the cooling nozzles of the respective first and second groups are connected, or by a suitable control of the at least one control valve, which is in a line between the frequency-controlled pump and the cooling nozzles of the first or second group is provided.
  • a further aim is that the energy content of the metallic product with regard to a further Processing following thermal surface treatment is as large as possible.
  • the metallic product is only cooled to the extent required for the desired constant structural transformation, thereby maintaining the uniform ferrite content in the material of the metallic product at a predetermined depth thereof, for example 5-10 mm, over one to achieve a length range extending between the front section and the rear section of the metallic product.
  • a plurality of cooling nozzles are arranged in the treatment section of the spray device above the metallic product and/or below the metallic product along the transport direction of the metallic product.
  • a cooling fluid is sprayed under pressure from these cooling nozzles onto the surfaces of the metallic product.
  • This cooling fluid is expediently used in the form of water or based on water.
  • the amount and / or the pressure for the cooling fluid for the cooling nozzles of the first Group are set larger than for the cooling nozzles in the second group.
  • Such a supply of the cooling nozzles of the first group of cooling nozzles with a larger amount of cooling fluid and/or a greater pressure than in comparison to the second group of cooling nozzles is expediently set for the cooling nozzles both on the top and on the bottom of the metallic product.
  • the temperature of the metallic product is measured. This can be done - viewed in the transport direction of the metallic product - upstream and/or downstream of the spray device. Furthermore, the can Temperature of the metallic product can be measured at its top and/or bottom. In any case, the temperature measurement for the metallic product is carried out for the purpose of adjusting or regulating the amount of cooling fluid that is applied from the cooling nozzles of the spray device onto the surfaces of the metallic product depending on this measured temperature of the metallic product.
  • the transport speed of a metallic product in the form of a separated slab, or the change in this transport speed for the slab within the treatment section of the spray device can also be adjusted or regulated.
  • the transport speed at which an isolated slab is guided past the cooling nozzles provided therein in the treatment section of the spray device or by specifically changing them, it can be achieved that the front section of the slab is guided past these cooling nozzles faster than the rear section of the slab, with the result that - as explained - the rear section of the slab is then cooled more strongly.
  • Another possibility for a targeted influence on the cooling of the metallic product is that - viewed in the transport direction of the metallic product - the surface quality of the metallic product is measured downstream of the spraying device in relation to the proportion of ferrite.
  • the cooling nozzles are arranged along the treatment section of the spray device on both sides of the metallic product, i.e. above and below it, it is expedient that the amount of water and / or the pressure for the cooling nozzles is below metallic product are chosen to be larger than for the cooling nozzles, which are arranged above the metallic product.
  • This can be achieved by supplying the cooling nozzles, which are arranged on the bottom of the metallic product, with cooling fluid from their own frequency-controlled pump, which means that the cooling nozzles, which are arranged on the top of the metallic product, are supplied by a separate one Frequency-controlled pump can be fed with cooling fluid.
  • the different supply of the cooling nozzles on the underside of the metallic product compared to the cooling nozzles on the top of the metallic product is achieved in that the cooling nozzles, which are arranged below and above the metallic product, are each supplied to different frequency-controlled pumps connected with cooling fluid.
  • the thickness of the metallic product for which the characteristic thermal surface treatment is implemented is at least 250 mm and/or that a width of the metallic product is at least 3000 mm.
  • the cooling fluid is intermittently applied from the cooling nozzles to the surfaces of the metallic product. This leads to the advantage that a controlled local heat removal can be achieved by means of intensive water cooling, for example at a specific point on the metallic product in relation to its longitudinal extent.
  • a spray device for the thermal surface treatment of a metallic product in the form of a separated slab comprising a treatment section with an inlet area and an outlet area, the metallic product being moved along the treatment section on a roller table of the inlet area can be moved towards the outlet area in a transport direction, and a plurality of cooling nozzles, from each of which a cooling fluid can be applied to the surfaces of the metallic product.
  • At least one roller element of the roller table is equipped with a motor drive.
  • the roller element equipped with the motor drive can be arranged adjacent to the treatment section.
  • a control device is provided with which the motor drive of the roller element is in signal connection, namely such that the speed or the peripheral speed of the roller element depends on at least one process parameter of the metallic Product or the isolated slab can be controlled and preferably regulated.
  • the at least one process parameter of the metallic product can be selected from the group consisting of temperature, ferrite content in the material of the metallic Product and/or geometry of the metallic product, in particular in relation to its cross section perpendicular to the transport direction.
  • the present invention creates a technology for targeted thermal surface treatment that enables automated adjustment of the temperature for a metallic product and its resulting metal structure. For example, the targeted delivery of a larger amount of cooling fluid through the cooling nozzles of the first group than through the cooling nozzles of the second group causes the rear section of the metallic product to undergo locally controlled, more intensive cooling than the front section of the metallic product.
  • the present invention makes it possible to influence the surface quality and structure of a steel casting strand produced on a vertical, vertical bend (i.e. system with a vertical area), a horizontal or curved continuous casting system (without a vertical area), in particular a casting strand of any product format.
  • a spray device 10 and a corresponding method for thermal surface treatment of a metallic product according to the present invention are shown and explained in order to achieve a targeted structural transformation or a desired structure, namely a substantially uniform ferrite content, for the metallic product.
  • the same features in the drawing are each provided with the same reference numbers. At this point it should be noted that the drawing is simply simplified and, in particular, shown without a scale.
  • Fig. 1 basically shows a simplified side view of a continuous casting system 100, which is equipped with the spray device 10.
  • the continuous casting system 100 includes Fig. 1 a mold that has a lower opening and thereby a vertical outlet downwards.
  • the mold is filled with liquid metal up to a level or liquid metal, for example steel or a steel alloy.
  • a metallic product 1 emerges through the lower opening of the mold in the form of a casting strand 2, which then runs through a supporting strand guide and is thereby transferred to the horizontal.
  • the continuous casting system 100 comprises a roller table 8 with a plurality of roller elements 9, on which the casting strand 2 is moved further in the transport direction T after it has been transferred to the horizontal.
  • a continuous casting plant 100 can be a thick slab plant with which a casting strand 2 with a thickness of preferably 250 mm, or possibly even larger casting thicknesses, can be produced.
  • the spray device 10 according to the invention is arranged in a part of the continuous casting system 100 in which the casting strand 2 has already been transferred to the horizontal.
  • This spray device 10 is used for the thermal surface treatment of the casting strand 2 and for this purpose is equipped with a plurality of cooling nozzles 16 which are provided in a treatment section 12 of the spray device 10.
  • the spray device 10 comprises a housing G.
  • an inlet region 14 is formed for the casting strand 2
  • an outlet area 15 is formed in a front region of this - seen in the transport direction T of the casting strand 2 - rear region of the housing G.
  • temperature measuring devices 13 Adjacent to the inlet area 14 and the outlet area 15, temperature measuring devices 13 are provided within the housing G, with which the Temperature of the casting strand 2 can be determined both when entering the housing G and when leaving the housing G. These temperature measuring devices 13 can each be arranged above and below the casting strand 2 or the roller table 8, on which the casting strand 2 is also moved in the transport direction T within the treatment section 12 of the spray device 10.
  • the metallic product 1 if it is within the treatment section 12 the spray device 10, has a front section 4 - seen in the transport direction T of the casting strand 2 - with which the metallic product 1 enters the treatment section 12.
  • the metallic product has a rear section 5 - seen in the transport direction T of the casting strand 2 - which lags behind the front section 4 or - again seen in the transport direction T of the casting strand 2 - is located upstream of the front section 4 .
  • the individual cooling nozzles 16 are combined into at least two groups within the treatment section 12 of the spray device 10, namely in a first group 16.1 and in a second group 16.2.
  • the second group 16.2 of the cooling nozzles 16 - seen in the transport direction T of the casting strand 2 - is arranged downstream of the first group 16.1 of the cooling nozzles 16.
  • Both the first group 16.1 and the second group 16.2 each contain cooling nozzles 16, which are arranged both on the top 6 of the casting strand 2 and on its underside 7.
  • the top 6 and the bottom 7 of the casting strand are, for example, in the Fig. 2 and Fig. 3 referred to as such.
  • the continuous casting system 100 comprises a separating device in the form of scissors S, which - seen in the transport direction T of the casting strand 2 - is arranged upstream of the spray device 10.
  • a cleaning device 22 for example in the form of a descaler, is also arranged upstream of the spray device 10.
  • FIG Fig. 2 A first embodiment for the spray device 10 according to the invention is shown in FIG Fig. 2 shown.
  • separate frequency-controlled pumps 18 are provided, with which the cooling nozzles 16 on the one hand of the first group 16.1 and on the other hand of the second group 16.2 are supplied with cooling fluid separately.
  • the cooling nozzles 16 of the first group 16.1 and the second group 16.2 are each connected via a line 17 to the frequency-controlled pump 18 assigned to them.
  • the two frequency-controlled pumps 18 are connected to a control device 20 for signaling purposes. Both of these pumps 18 are connected by unspecified lines to a tank or the like in which cooling fluid is contained. Operation of these pumps 20 can thus be suitably controlled or regulated by the control device 20 in order to thereby supply the cooling nozzles 16 of both the first group 16.1 and the second group 16.2 with cooling fluid.
  • control valves 19 are provided, which are also connected to the control device in terms of signaling 20 are connected and can thereby be actuated.
  • a suitable operating position of these control valves 19 can be used to control whether cooling fluid is applied to the surfaces of the casting strand 2 or not.
  • Fig. 3 shows a second embodiment for the spray device 10 according to the invention.
  • the cooling nozzles 16 of both the first group 16.1 and the second group 16.2 are now connected to a common frequency-controlled pump 18 for the purpose of supplying cooling fluid.
  • a control valve 19 which is provided in a line 17 between the frequency-controlled pump 18 and the two groups 16.1 and 16.2 of the cooling nozzles 16, it is possible to adjust the amount and at what pressure the cooling fluid is supplied to the cooling nozzles 16 of the first group 16.1 and is fed to the second group 16.2.
  • the frequency-controlled pump 18 and the control valve 17 are each controlled or regulated by the control device 20.
  • At least one roller element 9 of the roller table 8 is equipped with a motor drive M. Accordingly, this driven roller element is shown in the illustrations Fig. 2 and Fig. 3 each labeled "9(M)".
  • This driven roller element 9 (M) is also in signal connection with the control device 20, as shown, for example, in the Fig. 3 is symbolized by the dotted line and can be controlled accordingly by means of the control device 20.
  • a metallic product 1 is first produced in the form of a casting strand 2, which, after leaving the mold, first passes through the supporting strand guide and, after being transferred to the horizontal on the roller table 8, is moved further in the transport direction T. It can be provided here that the surfaces of the casting strand 2 are cleaned by means of the cleaning device 22, for example by applying water under high pressure.
  • the metallic product 1 also passes through the treatment section 12 of the spray device 10.
  • a thermal surface treatment for the metallic product 1 is carried out in that cooling fluid 16 is directed onto the surfaces through the cooling nozzles of the first group 16.1 and the second group 16.2 of the metallic product 1 is applied.
  • the metallic product 1 can be a casting strand 2 that has not yet been separated and accordingly represents an endless profile. This is in the representation of Fig. 4 illustrated, in which such an endless casting strand 2 is moved on the roller table 8 in the transport direction T.
  • the thermal surface treatment of the casting strand 2 within the treatment section 12 of the spray device 10 can be carried out in such a way that cooling fluid is applied to the surfaces of the casting strand 2 from the cooling nozzles 16 of the first group 16.1 with a larger amount and/or a greater pressure than in the comparison from the Cooling nozzles 16 of the second group 16.2.
  • This then has the consequence that the trailing rear section 5 of the casting strand 2 within the treatment section 12 of the spray device 10 is cooled more strongly than its front section 4.
  • This cooling strategy the result is achieved that in the material of the casting strand 2 at a predetermined depth of this, over a length range that extends between the front section 4 and the rear section 5, a substantially uniform ferrite proportion is established.
  • thermal surface treatment is also possible for an isolated slab 3, which has previously been formed from the casting strand 2, within the treatment section 12 of the spray device 10.
  • the casting strand 2 is separated by means of the scissors S before it reaches the spray device 10 on the roller table 8, so that a correspondingly separated slab 3 then enters the treatment section 12 of the spray device 10 or its housing G.
  • Moving the separated slab 3 within the treatment section 12 of the spraying device 10 in the transport direction T can be achieved by the driven roller element 9 (M). This is, for example, in the representation of Fig. 5 illustrated.
  • this cooling strategy can be achieved by moving the isolated slab 3 into the treatment section 12 of the spray device 10 or into its housing G in such a way that the front section 4 of the slab 3 passes the cooling nozzles 16 faster than the trailing one rear section 5 of the slab 5. This can be achieved with a suitable control of the driven roller element 9 (M) by the control device 20.
  • Fig. 6 shows a simplified perspective view of a quick-change frame 24 in which a group of cooling nozzles 16 are arranged.
  • a line 17 for cooling fluid leads laterally into such a quick-change frame 24 and is connected to spray pipes to which the individual cooling nozzles 16 are attached.
  • the line 17 is connected to a frequency-controlled pump 18 in order to thereby supply the cooling nozzles 16 with cooling fluid.
  • Fig. 6 clarifies that the quick-change frame 24 is designed in cross section in the form of a rectangular profile that encloses a central opening.
  • the roller table 8, which is in the for simplification Fig. 6 is not shown, extends through this central opening.
  • the top 6 and the bottom 7 of the metallic product 1 can be supplied with cooling fluid when this cooling fluid is discharged through the cooling nozzles 16 in the direction of the metallic product 1.
  • the quick-change frame 24 is equipped with a height adjustment device H.
  • This height adjustment device H acts on the spray pipes, which are arranged above the roller table 8. Accordingly, by activating this height adjustment device H, it is possible to change the distance between the cooling nozzles 16, which are arranged above the metallic product 1, relative to the top side 6 of the metallic product 1.
  • Fig. 7 shows a perspective view of the spray device 10 according to a further embodiment, in which - seen in the transport direction T of the metallic product - a total of three groups of cooling nozzles 16 are arranged.
  • a third group 16.3 of cooling nozzles 16 is now also provided, which - viewed in the transport direction T of the metallic product - is arranged downstream of the second group 16.2.
  • a quick-change frame 24 is also required for this purpose Fig. 6 can be used to arrange the cooling nozzles 16 above and below the metallic product 1.
  • cooling fluid is discharged from the cooling nozzles 16 of the third group 16.3 with a smaller amount and/or a smaller pressure than from the cooling nozzles 16 of the second group 16.2 .
  • the amount of cooling fluid discharged from the cooling nozzles 16 and/or its pressure for the three groups 16.1, 16.2 and 16.3, in this order are continuously reduced along the transport direction T.
  • cooling nozzles 16 of the second group 16.2 are then located approximately in an area between the front section 4 and the rear section 5 of the metallic product 1.
  • the quick-change frames 24 are positioned along the roller table 8 in such a way that they are integrated into the housing G of the spray device 10 and thereby a closed housing chamber K is formed at least in the area of the treatment section 12 of the spray device 10.
  • a cover is provided, which is shown in the illustration Fig. 7 marked with the designation “D”.
  • the inlet area 14 and the outlet area 15 of the housing chamber K are each equipped with a lock function in order to prevent the metallic product 1 from entering into the housing chamber K or the metallic product 1 from running out out of the housing chamber K to ensure.
  • the housing G can be equipped with a water vapor suction direction (not shown). It is therefore possible that water vapor, which can form within the closed housing chamber K when a metallic product 1 is inside the treatment section 12 of the Spray device 10 is subjected to a thermal surface treatment, is suctioned off suitably by means of this water vapor suction direction.
  • a defined heat removal for the metallic product 1 can be achieved using an adjustable amount of water.
  • this can also be achieved by means of an adjustable transport speed with which the slab 3 is moved into the treatment section 12 of the spray device 10 and thereby moved past the cooling nozzles 16.
  • the flowchart from Fig. 8 that it is possible by means of individual process parameters, which can include the geometry, the measured temperature of the metallic product 1 within the spray device 10 in its inlet area 14 and/or outlet area 15 and/or the surface quality of the metallic product 1 measured downstream of the spray device 10 is to implement automated process control that influences the operation of the continuous casting plant 100.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Claims (32)

  1. Procédé de traitement thermique de surface d'un produit métallique (1), en particulier sous la forme d'une barre de coulée (2) ou d'une brame (3) formée à partir de celle-ci, dans lequel le produit métallique (1) est déplacé dans une direction de transport (T) à travers une section de traitement (12), équipée de buses de refroidissement (16), d'un dispositif de pulvérisation (10), et un fluide de refroidissement est alors appliqué sur les surfaces du produit métallique (1) à travers les buses de refroidissement (16) du dispositif de pulvérisation (10), le produit métallique (1) - vu dans la direction de transport (T) du produit métallique (1) - présentant une section avant (4) et une section arrière (5) en retard,
    caractérisé en ce que
    la section arrière (5) du produit métallique (1) est refroidie plus fortement que la section avant (4) du produit métallique (1), de telle sorte que, suite à l'extraction de chaleur au moyen du fluide de refroidissement appliqué sur les surfaces du produit métallique (1), une teneur en ferrite sensiblement uniforme s'établit dans le matériau du produit métallique (1), à une profondeur prédéterminée de celui-ci, sur une plage de longueurs qui s'étend entre la section avant (4) et la section arrière (5) du produit métallique (1).
  2. Procédé selon la revendication 1, caractérisé en ce que, dans la section de traitement (12) du dispositif de pulvérisation (10), une pluralité de buses de refroidissement (16) sont disposées au-dessus du produit métallique (1) et/ou en dessous du produit métallique (1) le long de la direction de transport (T) du produit métallique (1), un fluide de refroidissement, notamment sous forme ou à base d'eau, étant projeté sous pression sur les surfaces du produit métallique (1) à partir de chacune des buses de refroidissement (16).
  3. Procédé selon la revendication 2, caractérisé en ce que les buses de refroidissement (16) sont disposées au moins dans un premier groupe (16.1) et dans un second groupe (16.2), le second groupe (16.2) de buses de refroidissement (16) - vu dans la direction de transport (T) du produit métallique (1) - étant disposé en aval du premier groupe (16.1) de buses de refroidissement (16).
  4. Procédé selon la revendication 2 ou 3, caractérisé en ce que les buses de refroidissement (16) sont raccordées à au moins une pompe à régulation de fréquence (18) pour l'alimentation en fluide de refroidissement, qui permet de délivrer le fluide de refroidissement aux buses de refroidissement (16) avec une quantité et une pression prédéterminées.
  5. Procédé selon la revendication 4, caractérisé en ce des pompes séparées à régulation de fréquence (18) sont prévues pour le premier groupe (16.1) et le second groupe (16.2) de buses de refroidissement (16).
  6. Procédé selon l'une des revendications 3 à 5, caractérisé en ce qu'au moins une vanne de réglage (19) est prévue dans une conduite (17) entre la pompe à régulation de fréquence (18) et les buses de refroidissement (16) du premier ou du second groupe (16.1, 16.2), qui permet de régler, par rapport au fluide de refroidissement, une quantité d'eau et/ou une pression pour les buses de refroidissement (16) du premier ou du second groupe (16.1, 16.2).
  7. Procédé selon la revendication 5 ou 6, caractérisé en ce que la quantité d'eau et/ou la pression pour le fluide de refroidissement dans les buses de refroidissement (16) du premier groupe (16.1) est ou sont choisie(s) plus grande(s) que dans les buses de refroidissement (16) du second groupe (16.2), de sorte que la section arrière (5) du produit métallique (1) est ainsi plus fortement refroidie que sa section avant (4).
  8. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le produit métallique (1) - vu dans sa direction de transport (T) - est découpé en amont du dispositif de pulvérisation (10) étant ainsi séparé en une brame (3).
  9. Procédé selon la revendication 8, caractérisé en ce que la vitesse de transport (v) de la brame (3) dans la section de traitement (12) du dispositif de pulvérisation (10) est modifiée de telle sorte que la section avant (4) de la brame (3) passe plus rapidement devant les buses de refroidissement (16) que la section arrière (5) de la brame (3).
  10. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le produit métallique (1) - vu dans sa direction de transport (1) - est nettoyé, de préférence décalaminé, en amont du dispositif de pulvérisation (10).
  11. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la température du produit métallique (1) - vu dans sa direction de transport - est mesurée en amont du dispositif de pulvérisation (10).
  12. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la température du produit métallique (1) - vu dans sa direction de transport (T) - est mesurée en aval du dispositif de pulvérisation (10).
  13. Procédé selon la revendication 11 ou 12, caractérisé en ce que la température du produit métallique (1) est mesurée sur sa face supérieure (6).
  14. Procédé selon l'une des revendications 11 à 13, caractérisé en ce que la température du produit métallique (1) est mesurée sur sa face inférieure (7).
  15. Procédé selon l'une des revendications 11 à 14, caractérisé en ce que la quantité de fluide de refroidissement distribuée par les buses de refroidissement (16) du dispositif de pulvérisation (10) sur les surfaces du produit métallique (1) est ajustée ou régulée en fonction de la température mesurée du produit métallique (1).
  16. Procédé selon l'une quelconque des revendications 11 à 15, dans la mesure où il se rapporte à la revendication 9, caractérisé en ce que la vitesse de transport (v) de la brame (3) ou la variation de cette vitesse de transport (v) à l'intérieur de la section de traitement (12) du dispositif de pulvérisation (10) est réglée ou régulée en fonction de la température mesurée du produit métallique (1).
  17. Procédé selon l'une des revendications précédentes, caractérisé en ce que - vu dans la direction de transport (T) du produit métallique (1) - en aval du dispositif de pulvérisation (10), la qualité de la surface du produit métallique (1) est mesurée par rapport à la proportion de ferrite, la quantité de fluide de refroidissement qui est appliqué par les buses de refroidissement (16) du dispositif de pulvérisation (10) sur les surfaces du produit métallique (1), et/ou sa pression et/ou la vitesse de transport de la brame (3) ou la variation de cette vitesse de transport (v) le long de la section de traitement (12) du dispositif de pulvérisation (10) étant réglées ou régulées en fonction de la proportion de ferrite mesurée.
  18. Procédé selon l'une quelconque des revendications 2 à 17, caractérisé en ce que les buses de refroidissement (16) sont disposées le long de la section de traitement (12) du dispositif de pulvérisation (10) à la fois au-dessus du produit métallique (1) et en dessous du produit métallique (1), la quantité d'eau et/ou la pression pour les buses de refroidissement (16) en dessous du produit métallique (1) étant choisie plus grande que pour les buses de refroidissement (16) au-dessus du produit métallique (1), de préférence, les buses de refroidissement (16) disposées en dessous du produit métallique (1) et les buses de refroidissement (16) disposées au-dessus du produit métallique (1) étant raccordées à des pompes à régulation de fréquence (18) respectivement différentes.
  19. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'épaisseur du produit métallique (1) est d'au moins 250 mm et/ou en ce qu'une largeur du produit métallique (1) est d'au moins 3000 mm.
  20. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le fluide de refroidissement est distribué par intermittence à partir des buses de refroidissement (16) sur les surfaces du produit métallique (1).
  21. Dispositif de pulvérisation (10) pour le traitement thermique de surface d'un produit métallique (1), en particulier sous la forme d'une barre coulée (2) ou d'une brame (3) formée à partir de celle-ci, pour la mise en oeuvre du procédé selon l'une des revendications 1 à 20, comprenant
    une section de traitement (12) avec une zone d'entrée (14) et une zone de sortie (15), le produit métallique (1) pouvant être déplacé le long de la section de traitement (12) depuis la zone d'entrée (14) en direction de la zone de sortie (15) dans une direction de transport (T), et
    une pluralité de buses de refroidissement (16), à partir desquelles un fluide de refroidissement peut être respectivement distribué sur les surfaces du produit métallique (1),
    caractérisé en ce que
    les buses de refroidissement (16) sont disposées au moins dans un premier groupe (16.1) et dans un second groupe (16.2), le second groupe (16.2) de buses de refroidissement (16) - vu dans la direction de transport (T) du produit métallique (1) - étant disposé en aval du premier groupe (16.1) de buses de refroidissement (16), et
    en ce que les buses de refroidissement (16) du premier groupe (16.1) et les buses de refroidissement (16) du second groupe (16.2) sont respectivement raccordées à des pompes séparées à régulation de fréquence (18), les pompes respectives à régulation de fréquence (18) permettant de régler, de préférence de réguler, par rapport au fluide de refroidissement, une quantité prédéterminée et/ou une pression prédéterminée pour les buses de refroidissement (16) du premier groupe (16.1) ou pour les buses de refroidissement (16) du second groupe (16.2).
  22. Dispositif de pulvérisation (10) pour le traitement thermique de surface d'un produit métallique (1), en particulier sous la forme d'une barre coulée (2) ou d'une brame (3) formée à partir de celle-ci, pour la mise en oeuvre du procédé selon l'une des revendications 1 à 20, comprenant
    une section de traitement (12) avec une zone d'entrée (14) et une zone de sortie (15), le produit métallique (1) pouvant être déplacé le long de la section de traitement (12) depuis la zone d'entrée (14) en direction de la zone de sortie (15) dans une direction de transport (T), et
    une pluralité de buses de refroidissement (16), à partir desquelles un fluide de refroidissement peut être respectivement distribué sur les surfaces du produit métallique (1),
    caractérisé en ce que
    les buses de refroidissement (16) sont disposées au moins dans un premier groupe (16.1) et dans un second groupe (16.2), le second groupe (16.2) des buses de refroidissement (16) - vu dans la direction de transport (T) du produit métallique (1) - étant disposé en aval du premier groupe (16.1) de buses de refroidissement (16), et
    en ce que les buses de refroidissement (16) du premier groupe (16.1) et les buses de refroidissement (16) du second groupe (16.2) sont raccordées à au moins une pompe à régulation de fréquence (18) et en ce qu'au moins une vanne de réglage (19) est prévue dans une conduite (17) entre la pompe à régulation de fréquence (18) et les buses de refroidissement (16) du premier ou du second groupe (16.1, 16.2), qui permet de régler, par rapport au fluide de refroidissement, une quantité d'eau et/ou une pression pour les buses de refroidissement (16) du premier ou du second groupe (16.1, 16.2).
  23. Dispositif de pulvérisation (10) selon la revendication 21 ou 22, caractérisé par un dispositif de commande (20) avec lequel la ou les pompes à régulation de fréquence (18) et/ou la vanne de réglage (19) est ou sont en liaison de signalisation, de telle sorte que le fonctionnement de cette ou de ces pompes (18) et/ou de la vanne de réglage (19) puisse être commandé, de préférence réglé, en fonction d'au moins un paramètre de processus du produit métallique (1).
  24. Dispositif de pulvérisation (10) selon l'une des revendications 21 à 23, caractérisé en ce que le produit métallique peut être déplacé le long de la section de traitement (12) sur une table à rouleaux (8) depuis la zone d'entrée (14) vers la zone de sortie (15) dans la direction de transport (T), dans lequel au moins un élément de rouleau (9) de la table à rouleaux (8) est équipé d'un entraînement motorisé (M), de préférence en ce que l'élément de rouleau (9) équipé de l'entraînement motorisé (M) est disposé de manière adjacente à la section de traitement (12).
  25. Dispositif de pulvérisation (10) selon l'une des revendications 21 à 24, caractérisé en ce que le premier groupe (16.1) de buses de refroidissement (16) et le second groupe (16.2) de buses de refroidissement (16) sont respectivement logés dans des cadres de changement rapide (24) séparés.
  26. Dispositif de pulvérisation (10) selon l'une des revendications 21 à 25, caractérisé en ce qu'une distance du premier groupe (16.1) de buses de refroidissement (16) et du second groupe (16.2) de buses de refroidissement (16) est variable de manière réglable l'une par rapport à l'autre dans la direction de transport (T) du produit métallique (1).
  27. Dispositif de pulvérisation (10) pour le traitement thermique de surface d'un produit métallique (1), sous la forme d'une brame (3) séparée, pour la mise en oeuvre du procédé selon l'une des revendications 1 à 20, comprenant
    une section de traitement (12) avec une zone d'entrée (14) et une zone de sortie (15), le produit métallique (1) pouvant être déplacé le long de la section de traitement (12) sur une table à rouleaux (8) depuis la zone d'entrée (14) en direction de la zone de sortie (15) dans une direction de transport (T), et
    une pluralité de buses de refroidissement (16), à partir desquelles un fluide de refroidissement peut être respectivement distribué sur les surfaces du produit métallique (1),
    caractérisé en ce qu'au moins un élément de rouleau (9) de la table à rouleaux (8) est équipé d'un entraînement motorisé (M), de préférence en ce que l'élément de rouleau (9) équipé de l'entraînement motorisé (M) est disposé de manière adjacente à la section de traitement (12).
  28. Dispositif de pulvérisation (10) selon la revendication 27, caractérisé en ce qu'il est prévu un dispositif de commande (20) avec lequel l'entraînement motorisé (M) de l'élément de rouleau (9) est en liaison de signalisation, de telle sorte que la vitesse de rotation ou la vitesse périphérique de l'élément de rouleau (9) puisse être commandée, de préférence réglée, en fonction d'au moins un paramètre de processus du produit métallique (1).
  29. Dispositif de pulvérisation (10) selon la revendication 23 ou 27, caractérisé en ce que ledit au moins un paramètre de processus du produit métallique (1) est choisi dans le groupe constitué par la température, la proportion de ferrite dans le matériau du produit métallique (1) et/ou la géométrie du produit métallique (1), notamment en ce qui concerne sa section transversale perpendiculaire à la direction de transport (T).
  30. Dispositif de pulvérisation (10) selon l'une quelconque des revendications 21 à 29, caractérisé par un boîtier (G) dans lequel la section de traitement (12) est prévue, de préférence en ce que ledit boîtier est équipé d'un dispositif d'aspiration de vapeur d'eau, de préférence encore, en ce que ledit boîtier (G) est réalisé sous la forme d'une chambre (K) et est sensiblement fermé, la zone d'entrée (14) et la zone de sortie (15) de la chambre (K) du boîtier étant respectivement équipées d'une fonction de sas pour empêcher l'entrée du produit métallique dans la chambre (K) du boîtier et la sortie du produit métallique (1) hors de la chambre (K) du boîtier.
  31. Dispositif de pulvérisation (10) selon l'une quelconque des revendications 27 à 30, caractérisé en ce que les buses de refroidissement (16) sont disposées dans au moins un cadre de changement rapide (24).
  32. Dispositif de pulvérisation (10) selon l'une quelconque des revendications 21 à 31, caractérisé par un dispositif de réglage en hauteur (H), avec lequel des buses de refroidissement (16), qui sont disposées sur une face supérieure (6) du produit métallique (1), sont disposées de manière réglable en hauteur, de sorte qu'il est ainsi possible de régler une distance de ces buses de refroidissement (16) par rapport à la table à rouleaux (8).
EP21772737.9A 2020-09-18 2021-08-31 Procédé et appareil de pulvérisation pour le traitement thermique de surface d'un produit métallique Active EP4214010B1 (fr)

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DE102020211720.9A DE102020211720A1 (de) 2020-09-18 2020-09-18 Verfahren und Sprüheinrichtung zur thermischen Oberflächenbehandlung eines metallischen Produkts
PCT/EP2021/073941 WO2022058152A1 (fr) 2020-09-18 2021-08-31 Procédé et appareil de pulvérisation pour le traitement thermique de surface d'un produit métallique

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CN115846424B (zh) * 2022-11-15 2023-07-28 郑州大学 一种用于高通量连铸连轧铝合金板材温度控制装置及工艺

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EP0650790B2 (fr) 1993-10-29 2013-10-16 DANIELI & C. OFFICINE MECCANICHE S.p.A. Procédé pour le traitement thermique de la surface d'un lingot
US5810951A (en) 1995-06-07 1998-09-22 Ipsco Enterprises Inc. Steckel mill/on-line accelerated cooling combination
AUPN733095A0 (en) * 1995-12-22 1996-01-25 Bhp Steel (Jla) Pty Limited Twin roll continuous caster
AU4596899A (en) * 1998-07-10 2000-02-01 Ipsco Inc. Method and apparatus for producing martensite- or bainite-rich steel using steckel mill and controlled cooling
DE102010052247A1 (de) * 2010-11-23 2012-05-24 Sms Siemag Ag Vorrichtung und Verfahren zur geregelten Sekundärkühlung einer Stranggießanlage
DE102015223788A1 (de) * 2015-11-30 2017-06-01 Sms Group Gmbh Verfahren zum Stranggießen eines Metallstranges und durch dieses Verfahren erhaltener Gießstrang
AT518450B1 (de) * 2016-03-17 2021-02-15 Primetals Technologies Austria GmbH Verfahren und Kühleinrichtung zum Kühlen eines metallischen Strangs
EP3318342A1 (fr) * 2016-11-07 2018-05-09 Primetals Technologies Austria GmbH Procédé de fonctionnement d'un ensemble de coulée-laminage
CN110605368A (zh) * 2019-09-26 2019-12-24 武汉钢铁有限公司 板坯喷淋冷却系统、方法及装置

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