EP3626840B1 - Treatment of hot rolled products made from metal - Google Patents

Treatment of hot rolled products made from metal Download PDF

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Publication number
EP3626840B1
EP3626840B1 EP18195234.2A EP18195234A EP3626840B1 EP 3626840 B1 EP3626840 B1 EP 3626840B1 EP 18195234 A EP18195234 A EP 18195234A EP 3626840 B1 EP3626840 B1 EP 3626840B1
Authority
EP
European Patent Office
Prior art keywords
rolling stock
sound
cooling section
roll stand
generator arrangement
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
EP18195234.2A
Other languages
German (de)
French (fr)
Other versions
EP3626840A1 (en
Inventor
Emmeran Sollner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Primetals Technologies Germany GmbH
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Primetals Technologies Germany GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Primetals Technologies Germany GmbH filed Critical Primetals Technologies Germany GmbH
Priority to EP18195234.2A priority Critical patent/EP3626840B1/en
Priority to US17/270,904 priority patent/US11273476B2/en
Priority to RU2021106899A priority patent/RU2766923C1/en
Priority to CN201980061148.7A priority patent/CN112673116B/en
Priority to PCT/EP2019/070503 priority patent/WO2020057824A1/en
Publication of EP3626840A1 publication Critical patent/EP3626840A1/en
Application granted granted Critical
Publication of EP3626840B1 publication Critical patent/EP3626840B1/en
Priority to US17/570,485 priority patent/US11779971B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226—Hot rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/007—Control for preventing or reducing vibration, chatter or chatter marks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/008—Monitoring or detecting vibration, chatter or chatter marks
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
    • C21D8/0421—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the working steps
    • C21D8/0426—Hot rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
    • C21D8/0447—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the heat treatment
    • C21D8/0463—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the heat treatment following hot rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B11/00—Subsidising the rolling process by subjecting rollers or work to vibrations, e.g. ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
    • B21B37/76—Cooling control on the run-out table
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/06—Surface hardening
    • C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation

Definitions

  • the present invention is based on a treatment method for hot rolling stock made of metal, the rolling stock being rolled in at least one roll stand and then cooled in a cooling section downstream of the at least one roll stand.
  • finishing trains are generally known in which a flat rolling stock of this type - for example a rolling stock made of steel or aluminum - is rolled, the finishing trains being followed by a cooling section in which the metallurgical properties and thus the mechanical properties of the rolling stock are set.
  • the cooling section As close as possible behind the last roll stand of the rolling train so that the cooling can begin as quickly as possible.
  • water is usually applied from above and in a precisely coordinated manner below - in exceptional cases only from above or only from below - the setting of the mechanical properties of the rolling stock.
  • the document DE 1901941 mentions a method and an apparatus for introducing a vibratory force into the rolls of a roll stand in order to improve the speed of thinning and the quality of the product.
  • the object of the present invention is to create possibilities by means of which the grain structure of the rolling stock can be additionally influenced.
  • a treatment method of the type mentioned at the beginning is designed in that sound generated by means of a sound generator arrangement is coupled into the rolling stock by means of a coupling device, so that a standing sound wave is formed at least in that area of the rolling stock that is in the vicinity of the coupling device.
  • the standing sound wave leads to (even if only slight) mechanical movements of the flat rolled stock at the frequency of the sound wave at some points on the rolling stock - namely where the so-called wave bellies of the sound wave are located. At other points - namely where the so-called wave nodes of the standing sound wave are - there is no such movement of the flat rolled stock.
  • the points on the rolling stock at which the corrugation bulges are located thus perform a movement relative to the locations on the rolling stock at which the wave nodes are located. These relative movements influence the grain growth, both the beginning of the grain growth and the speed of grain growth.
  • the process is similar to, for example, sodium acetate trihydrate, which remains liquid well below its melting point until the phase transition into a solid can be triggered by a sound pulse.
  • the sound generator arrangement can have a single sound generator or a plurality of sound generators as required.
  • the sound generators can be designed as so-called transducers, for example.
  • the sound preferably has a frequency in the MHz range or above.
  • the propagation speed of the sound is in the range of approx. 5000 m / s for steel, and even more than 6000 m / s for aluminum.
  • the result is a wavelength of approx. 0.1 mm in steel and approx. 0.08 mm in aluminum.
  • the wavelength is correspondingly shorter and is approx. 10 ⁇ m or approx. 8 ⁇ m.
  • the grain sizes are also in such orders of magnitude.
  • the sound generator arrangement possibly with the exception of a switching signal for switching on and off - is uncontrolled.
  • at least one control variable is preferably fed to the sound generator arrangement by a control device.
  • the sound generator arrangement sets a characteristic variable for the sound coupled into the rolling stock as a function of the control variable. As a result, a targeted setting of the effect caused by the standing sound wave can be realized.
  • the characteristic variable can in particular a frequency and / or an amplitude of the sound and / or - if the sound generator arrangement has several sound generators, each of which independently couple a sound signal into the rolling stock - Be a phase position of the sound signals of the sound generators relative to one another.
  • the control device preferably determines the at least one control variable as a function of the actual properties of the rolling stock upstream of the cooling section and / or of desired properties that the rolling stock should have after the cooling section.
  • the actual properties of the rolling stock upstream of the cooling section are in particular the temperature and the dimensions of the rolling stock (for example, in the case of flat rolling stock, its width and its thickness).
  • desired mechanical or metallurgical or microcrystalline properties of the flat rolled stock come into consideration as desired properties.
  • the coupling device is a work roll of the last roll stand before the cooling section.
  • the implementation of the treatment method is particularly simple, since no additional device is required.
  • the coupling device is a roller arranged between the last roll stand and the cooling section and set against the rolling stock. This embodiment has the advantage that the coupling device can be optimized specifically for coupling in the sound. Other locations can also be useful for coupling in the sound, for example a location between the penultimate and the last roll stand of the rolling train, a location within the cooling section or a location behind the cooling section, possibly before a reel downstream of the cooling section.
  • the rolling stock can in principle have any shape. In many cases, however, the rolling stock will be flat rolling stock, in particular a strip.
  • the advantageous configurations of the treatment device correspond to the configurations of the treatment method.
  • the advantages that can be achieved here are also the same as in the embodiments of the treatment method.
  • a hot rolling stock 1 made of metal is rolled in a roll stand 2.
  • the hot rolling stock 1 passes through the roll stand 2 in a transport direction x.
  • the hot rolling stock 1 can consist of steel, for example.
  • the temperature T of the hot rolling stock 1 when it emerges from the roll stand 2 is mostly between 750 ° C and 900 ° C.
  • the hot rolling stock 1 can consist of aluminum.
  • the temperature T of the hot rolling stock 1 when it emerges from the roll stand 2 is generally between 300 ° C. and 400 ° C.
  • the hot rolling stock 1 can also consist of another metal, for example copper, the metal in this case having a material-specific temperature.
  • the hot rolling stock 1 can in principle have any cross-section.
  • the hot rolling stock 1 is a flat rolling stock, in particular a strip.
  • the roll stand 2 is designed as a roll stand for rolling the flat rolling stock 1.
  • the roll stand 2 can have support rolls 4 in addition to its work rolls 3.
  • the rolling stock 1 After rolling in the roll stand 2, the rolling stock 1 continues to be conveyed in the transport direction x and therefore passes through a cooling section 5 downstream of the rolling stand 2.
  • the cooling section 5 is used as a cooling section for cooling the flat rolling stock 1 educated.
  • the rolling stock 1 In the cooling section 5, the rolling stock 1 is through Applying a liquid cooling medium 6 (mostly water) cooled.
  • the application of the cooling medium 6 takes place as shown in FIG FIG 1 usually from several sides, for example both from above and below in the case of a flat rolled stock. In principle, however, cooling from only one side is also possible, for example in the case of a flat rolled stock exclusively from above or exclusively from below.
  • the hot rolling stock 1 has a significantly lower temperature than before the cooling section 5. For example, the temperature of steel can be reduced to approx. 300 ° C.
  • the cooling section 5 can be followed by further devices, for example a reel 7, by means of which the rolling stock 1, if it is a strip, is reeled up.
  • Sound is generated by means of a sound generator arrangement 8.
  • the sound generator arrangement 8 has a number of sound generators 9, for example transducers.
  • the sound is coupled into the hot rolling stock 1 by means of a coupling device 10.
  • the coupling device 10 can, for example, as shown in FIG FIG 2 be a roller 11 which is set against the hot rolling stock 1 and which is arranged between the roll stand 2 and the cooling section 5.
  • the coupling device 10 can according to the illustration in FIG FIG 3 be a work roll 3 of the last roll stand 2.
  • a coupling in front of the roll stand 2, in the cooling section 5 or behind the cooling section 5 is also possible.
  • FIG 4 shows this as an example for the case of a flat rolled stock.
  • lines and circles should indicate those points where the wave nodes of the standing sound wave are located, i.e. where destructive interference results in an extinction of the sound wave. In between there are the places where the sound waves are not extinguished, especially due to constructive interference.
  • the point at which the sound is coupled into the hot rolling stock 1 will be selected in such a way that a standing sound wave is formed at least between the roll stand 2 and an entrance area of the cooling section 5. In some cases, however, other positions can be useful.
  • the structural transformation of the hot rolling stock 1 is influenced by the sound wave.
  • the frequency f of the coupled-in sound should therefore be in the MHz range or above, or the sound generator arrangement 8 should be designed to correspond to this.
  • the sound generator arrangement 8 is preferably designed as an adjustable sound generator arrangement.
  • the sound generator arrangement 8 can according to the illustration in FIG FIG 5 at least one control variable C can be fed from a control device 12 to the treatment device.
  • the sound generator arrangement 8 sets a characteristic variable f, A, ⁇ of the sound coupled into the hot rolling stock 1 as a function of the control variable C.
  • control device 12 of the sound generator arrangement 8 can correspond to the illustration in FIG FIG 5 Specify by means of a control variable C which frequency f the sound should have.
  • control device 12 of the sound generator arrangement 8 can be by means of specify another control variable C which amplitude A the sound should have. If the sound generator arrangement 8 as shown in FIG FIG 5 has several sound generators 9, which each independently couple a sound signal S into the hot rolling stock 1, the amplitude A can optionally be specified individually for the respective sound generator 9 by means of a respective control signal C.
  • control device 12 can also use a respective control variable C to control the sound generators 9 of the sound generator arrangement 8 - here again as an alternative or in addition to influencing the frequency f and / or amplitude A - also a phase position ⁇ of the sound signals S of the sound generators 9 relative pretend to each other.
  • the frequency f is generally the same for all sound generators 9.
  • the at least one control variable C can be determined by the control device 12 as required.
  • actual properties P of the hot rolling stock 1 upstream of the cooling section 5 can be specified for the control device 12.
  • the actual properties P of the hot rolling stock 1 upstream of the cooling section 5 can include, for example, its temperature T and / or at least one geometric dimension, in particular in the case of a flat rolling stock its width b or its thickness d (see also FIG FIG 1 and 4th ).
  • the control device 12 can also be given target properties P * which the hot rolling stock 1 should have after the cooling section 5.
  • the desired properties P * can include, for example, desired mechanical properties such as tensile strength, yield strength, breaking point, etc., or microcrystalline properties such as, for example, proportions of bainite, martensite and the like.
  • the control device 12 determines the control variable C in this case as a function of the properties P, P * specified for it.
  • the present invention has many advantages.
  • it is possible in a simple manner to change the structure when the hot rolling stock 1 is cooled, independently of the cooling in addition to influencing.
  • the structural properties of the rolling stock 1 can be improved, set more precisely and, above all, evened out.
  • the structure of the cooling section 5 can be simplified.
  • the distance to the last roll stand 2 can be increased without any problems.

Description

Gebiet der TechnikField of technology

Die vorliegende Erfindung geht aus von einem Behandlungsverfahren für heißes Walzgut aus Metall, wobei das Walzgut in mindestens einem Walzgerüst gewalzt und sodann in einer dem mindestens einen Walzgerüst nachgeordneten Kühlstrecke gekühlt wird.The present invention is based on a treatment method for hot rolling stock made of metal, the rolling stock being rolled in at least one roll stand and then cooled in a cooling section downstream of the at least one roll stand.

Die vorliegende Erfindung geht weiterhin aus von einer Behandlungseinrichtung für heißes Walzgut aus Metall,

  • wobei die Behandlungseinrichtung mindestens ein Walzgerüst aufweist, in dem das Walzgut gewalzt wird,
  • wobei die Behandlungseinrichtung eine dem Walzgerüst nachgeordnete Kühlstrecke aufweist, in der das Walzgut gekühlt wird.
The present invention is also based on a treatment device for hot rolled metal,
  • wherein the treatment device has at least one roll stand in which the rolling stock is rolled,
  • wherein the treatment device has a cooling section arranged downstream of the roll stand, in which the rolling stock is cooled.

Stand der TechnikState of the art

Derartige Behandlungsverfahren und die zugehörigen Behandlungseinrichtungen sind allgemein bekannt. Insbesondere sind allgemein Fertigstraßen bekannt, in denen ein flaches derartiges Walzgut - beispielsweise ein Walzgut aus Stahl oder aus Aluminium - gewalzt wird, wobei den Fertigstraßen jeweils eine Kühlstrecke nachgeordnet ist, in welcher die metallurgischen Eigenschaften und damit die mechanischen Eigenschaften des Walzguts eingestellt werden.Such treatment methods and the associated treatment devices are generally known. In particular, finishing trains are generally known in which a flat rolling stock of this type - for example a rolling stock made of steel or aluminum - is rolled, the finishing trains being followed by a cooling section in which the metallurgical properties and thus the mechanical properties of the rolling stock are set.

Im Stand der Technik besteht hierbei das Bestreben, die Kühlstrecke möglichst nahe hinter dem letzten Walzgerüst der Walzstraße anzuordnen, damit die Kühlung möglichst schnell beginnen kann. In der Kühlstrecke erfolgt üblicherweise über eine exakt abgestimmte Beaufschlagung mit Wasser von oben und unten - in Ausnahmefällen nur von oben oder nur von unten - die Einstellung der mechanischen Eigenschaften des Walzguts. Insbesondere ist es von Bedeutung, dass das Walzgut mit dem möglichst genau richtigen Temperaturverlauf (als Funktion der Zeit) abkühlt. Dies beeinflusst insbesondere die Kornstruktur des Walzguts Außerdem, das Dokument DE 1901941 erwähnt ein Verfahren und eine Vorrichtung zum Einführen einer Schwingungskraft in die Walzen eines Walzengerüstes, um die Geschwindigkeit der Dickenverminderung und die Qualität des Produkts zu verbessern.In the prior art, there is an effort to arrange the cooling section as close as possible behind the last roll stand of the rolling train so that the cooling can begin as quickly as possible. In the cooling section, water is usually applied from above and in a precisely coordinated manner below - in exceptional cases only from above or only from below - the setting of the mechanical properties of the rolling stock. In particular, it is important that the rolling stock cools down with as precisely the correct temperature profile as possible (as a function of time). This particularly affects the grain structure of the rolling stock. In addition, the document DE 1901941 mentions a method and an apparatus for introducing a vibratory force into the rolls of a roll stand in order to improve the speed of thinning and the quality of the product.

Zusammenfassung der ErfindungSummary of the invention

Die Aufgabe der vorliegenden Erfindung besteht darin, Möglichkeiten zu schaffen, mittels derer die Kornstruktur des Walzguts zusätzlich beeinflusst werden kann.The object of the present invention is to create possibilities by means of which the grain structure of the rolling stock can be additionally influenced.

Die Aufgabe wird durch ein Behandlungsverfahren mit den Merkmalen des Anspruchs 1 gelöst. Vorteilhafte Ausgestaltungen des Behandlungsverfahrens sind Gegenstand der abhängigen Ansprüche 2 bis 7.The object is achieved by a treatment method with the features of claim 1. Advantageous refinements of the treatment method are the subject matter of the dependent claims 2 to 7.

Erfindungsgemäß wird ein Behandlungsverfahren der eingangs genannten Art dadurch ausgestaltet, dass mittels einer Schallgeneratoranordnung generierter Schall mittels einer Koppeleinrichtung in das Walzgut eingekoppelt wird, so dass sich zumindest in demjenigen Bereich des Walzguts, der sich in der Nähe der Koppeleinrichtung befindet, eine stehende Schallwelle ausbildet.According to the invention, a treatment method of the type mentioned at the beginning is designed in that sound generated by means of a sound generator arrangement is coupled into the rolling stock by means of a coupling device, so that a standing sound wave is formed at least in that area of the rolling stock that is in the vicinity of the coupling device.

Die stehende Schallwelle führt an manchen Stellen des Walzguts - nämlich dort, wo sich die sogenannten Wellenbäuche der Schallwelle befinden - zu (wenn auch nur geringfügigen) mechanischen Bewegungen des flachen Walzguts mit der Frequenz der Schallwelle. An anderen Stellen - nämlich dort, wo sich die sogenannten Wellenknoten der stehenden Schallwelle befinden - erfolgt keine derartige Bewegung des flachen Walzguts. Die Stellen des Walzguts, an denen sich die Wellenbäuche befinden, führen somit eine Bewegung relativ zu den Stellen des Walzguts aus, an denen sich die Wellenknoten befinden. Diese Relativbewegungen beeinflussen das Kornwachstum, und zwar sowohl den Beginn des Kornwachstums als auch die Geschwindigkeit des Kornwachstums. Der Vorgang ist ein ähnlicher wie beispielsweise bei Natriumacetat-Trihydrat, das bis weit unter seinen Schmelzpunkt flüssig bleibt, bis durch einen Schallpuls die Phasenumwandlung in einen Feststoff ausgelöst werden kann. Durch Wahl einer geeigneten Frequenz und einer geeigneten Amplitude der stehenden Schallwelle kann somit gezielt auf die Korngröße Einfluss genommen werden. Die Schallgeneratoranordnung kann nach Bedarf einen einzelnen Schallgenerator oder mehrere Schallgeneratoren aufweisen. Die Schallgeneratoren können beispielsweise als sogenannte Transducer ausgebildet sein.The standing sound wave leads to (even if only slight) mechanical movements of the flat rolled stock at the frequency of the sound wave at some points on the rolling stock - namely where the so-called wave bellies of the sound wave are located. At other points - namely where the so-called wave nodes of the standing sound wave are - there is no such movement of the flat rolled stock. The points on the rolling stock at which the corrugation bulges are located thus perform a movement relative to the locations on the rolling stock at which the wave nodes are located. These relative movements influence the grain growth, both the beginning of the grain growth and the speed of grain growth. The process is similar to, for example, sodium acetate trihydrate, which remains liquid well below its melting point until the phase transition into a solid can be triggered by a sound pulse. By choosing a suitable frequency and a suitable amplitude of the standing sound wave, the grain size can be influenced in a targeted manner. The sound generator arrangement can have a single sound generator or a plurality of sound generators as required. The sound generators can be designed as so-called transducers, for example.

Vorzugsweise weist der Schall eine Frequenz im MHz-Bereich oder darüber auf. Insbesondere liegt die Ausbreitungsgeschwindigkeit des Schalls bei Stahl im Bereich von ca. 5000 m/s, bei Aluminium sogar über 6000 m/s. Bei einer angenommenen Frequenz von 50 MHz ergibt sich somit in Stahl eine Wellenlänge von ca. 0,1 mm, in Aluminium von ca. 0,08 mm. Bei einer angenommenen Frequenz von 500 MHz ist die Wellenlänge entsprechend kürzer und beträgt ca. 10 µm bzw. ca. 8 µm. In derartigen Größenordnungen liegen auch die Korngrößen.The sound preferably has a frequency in the MHz range or above. In particular, the propagation speed of the sound is in the range of approx. 5000 m / s for steel, and even more than 6000 m / s for aluminum. With an assumed frequency of 50 MHz, the result is a wavelength of approx. 0.1 mm in steel and approx. 0.08 mm in aluminum. At an assumed frequency of 500 MHz, the wavelength is correspondingly shorter and is approx. 10 µm or approx. 8 µm. The grain sizes are also in such orders of magnitude.

Es ist möglich, dass die Schallgeneratoranordnung - eventuell mit Ausnahme eines Schaltsignals zum Einschalten und Ausschalten - ungesteuert ist. Vorzugsweise wird der Schallgeneratoranordnung jedoch von einer Steuereinrichtung mindestens eine Steuergröße zugeführt. In diesem Fall stellt die Schallgeneratoranordnung eine charakteristische Größe des in das Walzgut eingekoppelten Schalls in Abhängigkeit von der Steuergröße ein. Dadurch ist eine gezielte Einstellung der durch die stehende Schallwelle hervorgerufenen Wirkung realisierbar.It is possible that the sound generator arrangement - possibly with the exception of a switching signal for switching on and off - is uncontrolled. However, at least one control variable is preferably fed to the sound generator arrangement by a control device. In this case, the sound generator arrangement sets a characteristic variable for the sound coupled into the rolling stock as a function of the control variable. As a result, a targeted setting of the effect caused by the standing sound wave can be realized.

Die charakteristische Größe kann insbesondere eine Frequenz und/oder eine Amplitude des Schalls und/oder - falls die Schallgeneratoranordnung mehrere Schallgeneratoren aufweist, die jeweils eigenständig ein Schallsignal in das Walzgut einkoppeln - eine Phasenlage der Schallsignale der Schallgeneratoren relativ zueinander sein.The characteristic variable can in particular a frequency and / or an amplitude of the sound and / or - if the sound generator arrangement has several sound generators, each of which independently couple a sound signal into the rolling stock - Be a phase position of the sound signals of the sound generators relative to one another.

Vorzugsweise ermittelt die Steuereinrichtung die mindestens eine Steuergröße in Abhängigkeit von Isteigenschaften des Walzguts vor der Kühlstrecke und/oder von Solleigenschaften, die das Walzgut hinter der Kühlstrecke aufweisen soll. Als Isteigenschaften des Walzguts vor der Kühlstrecke kommen insbesondere die Temperatur und die Dimensionen des Walzguts (beispielsweise bei flachem Walzgut dessen Breite und dessen Dicke) in Frage. Als Solleigenschaften kommen insbesondere gewünschte mechanische oder metallurgische bzw. mikrokristalline Eigenschaften des flachen Walzguts in Frage.The control device preferably determines the at least one control variable as a function of the actual properties of the rolling stock upstream of the cooling section and / or of desired properties that the rolling stock should have after the cooling section. The actual properties of the rolling stock upstream of the cooling section are in particular the temperature and the dimensions of the rolling stock (for example, in the case of flat rolling stock, its width and its thickness). In particular, desired mechanical or metallurgical or microcrystalline properties of the flat rolled stock come into consideration as desired properties.

Theoretisch ist es möglich, den generierten Schall über einen Luftspalt kontaktlos in das Walzgut einzukoppeln. Eine kontaktbehaftete Einkopplung weist jedoch einen erheblich besseren Wirkungsgrad auf. Es ist möglich, dass die Koppeleinrichtung eine Arbeitswalze des letzten Walzgerüsts vor der Kühlstrecke ist. In diesem Fall gestaltet sich die Implementierung des Behandlungsverfahrens besonders einfach, da keine zusätzliche Einrichtung erforderlich ist. Alternativ ist es möglich, dass die Koppeleinrichtung eine zwischen dem letzten Walzgerüst und der Kühlstrecke angeordnete, an das Walzgut angestellte Rolle ist. Diese Ausgestaltung weist den Vorteil auf, dass die Koppeleinrichtung speziell auf das Einkoppeln hin des Schalls optimiert werden kann. Auch andere Orte können zu Einkopplung des Schalls sinnvoll sein, beispielsweise eine Stelle zwischen dem vorletzten und dem letzten Walzgerüst der Walzstraße, eine Stelle innerhalb der Kühlstrecke oder eine Stelle hinter der Kühlstrecke, gegebenenfalls vor einem der Kühlstrecke nachgeordneten Haspel.Theoretically, it is possible to couple the generated sound into the rolling stock without contact via an air gap. A coupling with contacts, however, has a considerably better degree of efficiency. It is possible that the coupling device is a work roll of the last roll stand before the cooling section. In this case, the implementation of the treatment method is particularly simple, since no additional device is required. Alternatively, it is possible that the coupling device is a roller arranged between the last roll stand and the cooling section and set against the rolling stock. This embodiment has the advantage that the coupling device can be optimized specifically for coupling in the sound. Other locations can also be useful for coupling in the sound, for example a location between the penultimate and the last roll stand of the rolling train, a location within the cooling section or a location behind the cooling section, possibly before a reel downstream of the cooling section.

Das Walzgut kann prinzipiell eine beliebige Gestalt aufweisen. In vielen Fällen wird das Walzgut jedoch ein flaches Walzgut sein, insbesondere ein Band.The rolling stock can in principle have any shape. In many cases, however, the rolling stock will be flat rolling stock, in particular a strip.

Die Aufgabe wird weiterhin durch eine Behandlungseinrichtung mit den Merkmalen des Anspruchs 8 gelöst. Vorteilhafte Ausgestaltungen der Behandlungseinrichtung sind Gegenstand der abhängigen Ansprüche 9 bis 14.The object is also achieved by a treatment device having the features of claim 8. Advantageous configurations of the treatment device are the subject of dependent claims 9 to 14.

Erfindungsgemäß wird eine Behandlungseinrichtung der eingangs genannten Art dadurch ausgestaltet,

  • dass die Behandlungseinrichtung eine Schallgeneratoranordnung aufweist, mittels derer Schall generiert wird, und
  • dass die Behandlungseinrichtung eine Koppeleinrichtung aufweist, mittels derer der mittels der Schallgeneratoranordnung generierte Schall in das Walzgut eingekoppelt wird, so dass sich zumindest in demjenigen Bereich des Walzguts, der sich in der Nähe der Koppeleinrichtung befindet, eine stehende Schallwelle ausbildet.
According to the invention, a treatment device of the type mentioned at the outset is configured by
  • that the treatment device has a sound generator arrangement by means of which sound is generated, and
  • that the treatment device has a coupling device by means of which the sound generated by means of the sound generator arrangement is coupled into the rolling stock, so that a standing sound wave is formed at least in that area of the rolling stock that is in the vicinity of the coupling device.

Die dadurch erzielbaren Vorteile korrespondieren mit denen des Behandlungsverfahrens.The advantages that can be achieved in this way correspond to those of the treatment method.

Die vorteilhaften Ausgestaltungen der Behandlungseinrichtung korrespondieren mit den Ausgestaltungen des Behandlungsverfahrens. Auch die hierbei erzielbaren Vorteile sind dieselben wie bei den Ausgestaltungen des Behandlungsverfahren.The advantageous configurations of the treatment device correspond to the configurations of the treatment method. The advantages that can be achieved here are also the same as in the embodiments of the treatment method.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Die oben beschriebenen Eigenschaften, Merkmale und Vorteile dieser Erfindung sowie die Art und Weise, wie diese erreicht werden, werden klarer und deutlicher verständlich im Zusammenhang mit der folgenden Beschreibung der Ausführungsbeispiele, die in Verbindung mit den Zeichnungen näher erläutert werden. Hierbei zeigen in schematischer Darstellung:

FIG 1
eine Behandlungseinrichtung für ein Walzgut,
FIG 2
eine Ausgestaltung der Behandlungseinrichtung von FIG 1,
FIG 3
eine weitere Ausgestaltung der Behandlungseinrichtung von FIG 1,
FIG 4
einen Abschnitt eines flachen Walzguts und
FIG 5
eine Steuereinrichtung und eine Schallgeneratoranordnung.
The properties, features and advantages of this invention described above and the manner in which they are achieved will become clearer and more clearly understood in connection with the following description of the exemplary embodiments, which are explained in more detail in conjunction with the drawings. Here show in a schematic representation:
FIG 1
a treatment device for a rolling stock,
FIG 2
an embodiment of the treatment facility from FIG 1 ,
FIG 3
another embodiment of the treatment facility of FIG 1 ,
FIG 4
a section of flat rolled stock and
FIG 5
a control device and a sound generator arrangement.

Beschreibung der AusführungsformenDescription of the embodiments

Gemäß FIG 1 wird ein heißes Walzgut 1 aus Metall in einem Walzgerüst 2 gewalzt. Das heiße Walzgut 1 durchläuft das Walzgerüst 2 in einer Transportrichtung x. Das heiße Walzgut 1 kann beispielsweise aus Stahl bestehen. In diesem Fall liegt die Temperatur T des heißen Walzguts 1 beim Austreten aus dem Walzgerüst 2 meist zwischen 750 °C und 900 °C. Alternativ kann das heiße Walzgut 1 aus Aluminium bestehen. In diesem Fall liegt die Temperatur T des heißen Walzguts 1 beim Austreten aus dem Walzgerüst 2 in der Regel zwischen 300 °C und 400 °C. Das heiße Walzgut 1 kann auch aus einem anderen Metall bestehen, beispielsweise Kupfer, wobei das Metall in diesem Fall eine materialspezifische Temperatur aufweist.According to FIG 1 a hot rolling stock 1 made of metal is rolled in a roll stand 2. The hot rolling stock 1 passes through the roll stand 2 in a transport direction x. The hot rolling stock 1 can consist of steel, for example. In this case, the temperature T of the hot rolling stock 1 when it emerges from the roll stand 2 is mostly between 750 ° C and 900 ° C. Alternatively, the hot rolling stock 1 can consist of aluminum. In this case, the temperature T of the hot rolling stock 1 when it emerges from the roll stand 2 is generally between 300 ° C. and 400 ° C. The hot rolling stock 1 can also consist of another metal, for example copper, the metal in this case having a material-specific temperature.

Oftmals wird das heiße Walzgut 1 vor dem Walzen in dem in FIG 2 dargestellten Walzgerüst 2 in weiteren, dem Walzgerüst 2 vorgeordneten Walzgerüsten gewalzt. Die weiteren Walzgerüste sind in FIG 1 nicht mit dargestellt.Often the hot rolling stock 1 is in the in FIG 2 Rolled stand 2 shown in further, the roll stand 2 upstream roll stands. The other roll stands are in FIG 1 not shown.

Das heiße Walzgut 1 kann prinzipiell einen beliebigen Querschnitt aufweisen. In vielen Fällen ist das heiße Walzgut 1 ein flaches Walzgut, insbesondere ein Band. Dementsprechend ist das Walzgerüst 2 als Walzgerüst zum Walzen des flachen Walzguts 1 ausgebildet. Insbesondere kann das Walzgerüst 2 in diesem Fall zusätzlich zu seinen Arbeitswalzen 3 Stützwalzen 4 aufweisen.The hot rolling stock 1 can in principle have any cross-section. In many cases, the hot rolling stock 1 is a flat rolling stock, in particular a strip. Accordingly, the roll stand 2 is designed as a roll stand for rolling the flat rolling stock 1. In particular, in this case the roll stand 2 can have support rolls 4 in addition to its work rolls 3.

Nach dem Walzen in dem Walzgerüst 2 wird das Walzgut 1 weiterhin in der Transportrichtung x gefördert und durchläuft daher eine dem Walzgerüst 2 nachgeordnete Kühlstrecke 5. Sofern das heiße Walzgut 1 ein flaches Walzgut ist, ist die Kühlstrecke 5 als Kühlstrecke zum Kühlen des flachen Walzguts 1 ausgebildet. In der Kühlstrecke 5 wird das Walzgut 1 durch Beaufschlagen mit einem flüssigen Kühlmedium 6 (meist Wasser) gekühlt. Das Beaufschlagen mit dem Kühlmedium 6 erfolgt entsprechend der Darstellung in FIG 1 in der Regel von mehreren Seiten, beispielsweise bei einem flachen Walzgut sowohl von oben als auch von unten. Prinzipiell ist aber auch eine Kühlung von nur einer Seite aus möglich, beispielsweise bei einem flachen Walzgut ausschließlich von oben oder ausschließlich von unten. Hinter der Kühlstrecke 5 weist das heiße Walzgut 1 eine deutlich niedrigere Temperatur auf als vor der Kühlstrecke 5. Beispielsweise kann bei Stahl die Temperatur auf ca. 300 °C abgesenkt werden.After rolling in the roll stand 2, the rolling stock 1 continues to be conveyed in the transport direction x and therefore passes through a cooling section 5 downstream of the rolling stand 2. If the hot rolling stock 1 is flat rolling stock, the cooling section 5 is used as a cooling section for cooling the flat rolling stock 1 educated. In the cooling section 5, the rolling stock 1 is through Applying a liquid cooling medium 6 (mostly water) cooled. The application of the cooling medium 6 takes place as shown in FIG FIG 1 usually from several sides, for example both from above and below in the case of a flat rolled stock. In principle, however, cooling from only one side is also possible, for example in the case of a flat rolled stock exclusively from above or exclusively from below. Behind the cooling section 5, the hot rolling stock 1 has a significantly lower temperature than before the cooling section 5. For example, the temperature of steel can be reduced to approx. 300 ° C.

Der Kühlstrecke 5 können weitere Einrichtungen nachgeordnet sein, beispielsweise ein Haspel 7, mittels dessen das Walzgut 1, sofern es ein Band ist, aufgehaspelt wird.The cooling section 5 can be followed by further devices, for example a reel 7, by means of which the rolling stock 1, if it is a strip, is reeled up.

Mittels einer Schallgeneratoranordnung 8 wird Schall generiert. Die Schallgeneratoranordnung 8 weist zu diesem Zweck eine Anzahl von Schallgeneratoren 9 auf, beispielsweise Transducer. Der Schall wird mittels einer Koppeleinrichtung 10 in das heiße Walzgut 1 eingekoppelt. Die Koppeleinrichtung 10 kann beispielsweise entsprechend der Darstellung in FIG 2 eine an das heiße Walzgut 1 angestellte Rolle 11 sein, die zwischen dem Walzgerüst 2 und der Kühlstrecke 5 angeordnet ist. Alternativ kann die Koppeleinrichtung 10 entsprechend der Darstellung in FIG 3 eine Arbeitswalze 3 des letzten Walzgerüsts 2 sein. Weiterhin ist es ebenso möglich, den Schall an anderen Stellen in das heiße Walzgut 1 einzukoppeln. Insbesondere ist auch eine ein Kopplung vor dem Walzgerüst 2, in der Kühlstrecke 5 oder hinter der Kühlstrecke 5 möglich.Sound is generated by means of a sound generator arrangement 8. For this purpose, the sound generator arrangement 8 has a number of sound generators 9, for example transducers. The sound is coupled into the hot rolling stock 1 by means of a coupling device 10. The coupling device 10 can, for example, as shown in FIG FIG 2 be a roller 11 which is set against the hot rolling stock 1 and which is arranged between the roll stand 2 and the cooling section 5. Alternatively, the coupling device 10 can according to the illustration in FIG FIG 3 be a work roll 3 of the last roll stand 2. Furthermore, it is also possible to couple the sound into the hot rolling stock 1 at other points. In particular, a coupling in front of the roll stand 2, in the cooling section 5 or behind the cooling section 5 is also possible.

Durch den eingekoppelten Schall bildet sich zumindest in demjenigen Bereich des heißen Walzguts 1, der sich in der Nähe derjenigen Stelle befindet, an welcher der Schall in das heiße Walzgut 1 eingekoppelt wird, eine stehende Schallwelle aus. FIG 4 zeigt dies beispielhaft für den Fall eines flachen Walzguts. Die in FIG 4 eingezeichneten Linien und Kreise sollen diejenigen Stellen andeuten, an denen sich die Wellenknoten der stehenden Schallwelle befinden, an denen es also durch destruktive Interferenz im Ergebnis zu einer Auslöschung der Schallwelle kommt. Dazwischen befinden sich die Stellen, an denen die Schallwellen nicht ausgelöscht ist, insbesondere durch konstruktive Interferenz stellenweise maximal ist.As a result of the coupled-in sound, a standing sound wave is formed at least in that region of the hot rolling stock 1 which is located in the vicinity of the point at which the sound is coupled into the hot rolling stock 1. FIG 4 shows this as an example for the case of a flat rolled stock. In the FIG 4 drawn lines and circles should indicate those points where the wave nodes of the standing sound wave are located, i.e. where destructive interference results in an extinction of the sound wave. In between there are the places where the sound waves are not extinguished, especially due to constructive interference.

In vielen Fällen wird die Stelle, an welcher der Schall in das heiße Walzgut 1 eingekoppelt wird, derart gewählt sein, dass sich zumindest zwischen dem Walzgerüst 2 und einem Eingangsbereich der Kühlstrecke 5 eine stehende Schallwelle ausbildet. In manchen Fällen können aber auch andere Stellen sinnvoll sein.In many cases, the point at which the sound is coupled into the hot rolling stock 1 will be selected in such a way that a standing sound wave is formed at least between the roll stand 2 and an entrance area of the cooling section 5. In some cases, however, other positions can be useful.

Durch die Schallwelle wird die Gefügeumwandlung des heißen Walzguts 1 beeinflusst. Insbesondere wird das Gefüge umso feinkörniger, je größer die Frequenz f des eingekoppelten Schalls und damit auch der stehenden Schallwelle ist. Die Frequenz f des eingekoppelten Schalls sollte daher im MHz-Bereich oder darüber liegen bzw. hiermit korrespondierend die Schallgeneratoranordnung 8 entsprechend ausgebildet sein.The structural transformation of the hot rolling stock 1 is influenced by the sound wave. In particular, the higher the frequency f of the coupled-in sound and thus also of the standing sound wave, the finer-grained the structure becomes. The frequency f of the coupled-in sound should therefore be in the MHz range or above, or the sound generator arrangement 8 should be designed to correspond to this.

Vorzugsweise ist die Schallgeneratoranordnung 8 als einstellbare Schallgeneratoranordnung ausgebildet. In diesem Fall kann der Schallgeneratoranordnung 8 entsprechend der Darstellung in FIG 5 von einer Steuereinrichtung 12 der Behandlungseinrichtung mindestens eine Steuergröße C zugeführt werden. Die Schallgeneratoranordnung 8 stellt in diesem Fall eine charakteristische Größe f, A, ϕ des in das heiße Walzgut 1 eingekoppelten Schalls in Abhängigkeit von der Steuergröße C ein.The sound generator arrangement 8 is preferably designed as an adjustable sound generator arrangement. In this case, the sound generator arrangement 8 can according to the illustration in FIG FIG 5 at least one control variable C can be fed from a control device 12 to the treatment device. In this case, the sound generator arrangement 8 sets a characteristic variable f, A, ϕ of the sound coupled into the hot rolling stock 1 as a function of the control variable C.

Beispielsweise kann die Steuereinrichtung 12 der Schallgeneratoranordnung 8 entsprechend der Darstellung in FIG 5 mittels einer Steuergröße C vorgeben, welche Frequenz f der Schall aufweisen soll. Alternativ oder zusätzlich kann die Steuereinrichtung 12 der Schallgeneratoranordnung 8 mittels einer anderen Steuergröße C vorgeben, welche Amplitude A der Schall aufweisen soll. Falls die Schallgeneratoranordnung 8 entsprechend der Darstellung in FIG 5 mehrere Schallgeneratoren 9 aufweist, die jeweils eigenständig ein Schallsignal S in das heiße Walzgut 1 einkoppeln, kann gegebenenfalls die Amplitude A mittels eines jeweiligen Steuersignals C individuell für den jeweiligen Schallgenerator 9 vorgegeben werden. Im Falle mehrerer Schallgeneratoren 9 kann die Steuereinrichtung 12 den Schallgeneratoren 9 der Schallgeneratoranordnung 8 mittels einer jeweiligen Steuergröße C weiterhin - auch hier wieder alternativ oder zusätzlich zur Beeinflussung von Frequenz f und/oder Amplitude A - auch eine Phasenlage ϕ der Schallsignale S der Schallgeneratoren 9 relativ zueinander vorgeben. Die Frequenz f ist hingegen in aller Regel für alle Schallgeneratoren 9 dieselbe.For example, the control device 12 of the sound generator arrangement 8 can correspond to the illustration in FIG FIG 5 Specify by means of a control variable C which frequency f the sound should have. Alternatively or additionally, the control device 12 of the sound generator arrangement 8 can be by means of specify another control variable C which amplitude A the sound should have. If the sound generator arrangement 8 as shown in FIG FIG 5 has several sound generators 9, which each independently couple a sound signal S into the hot rolling stock 1, the amplitude A can optionally be specified individually for the respective sound generator 9 by means of a respective control signal C. In the case of several sound generators 9, the control device 12 can also use a respective control variable C to control the sound generators 9 of the sound generator arrangement 8 - here again as an alternative or in addition to influencing the frequency f and / or amplitude A - also a phase position ϕ of the sound signals S of the sound generators 9 relative pretend to each other. In contrast, the frequency f is generally the same for all sound generators 9.

Die mindestens eine Steuergröße C kann von der Steuereinrichtung 12 nach Bedarf ermittelt werden. Beispielsweise können der Steuereinrichtung 12 Isteigenschaften P des heißen Walzguts 1 vor der Kühlstrecke 5 vorgegeben werden. Die Isteigenschaften P des heißen Walzguts 1 vor der Kühlstrecke 5 können beispielsweise dessen Temperatur T und/oder mindestens eine geometrische Dimension umfassen, insbesondere bei einem flachen Walzgut dessen Breite b oder dessen Dicke d (siehe auch FIG 1 und 4). Alternativ oder zusätzlich können der Steuereinrichtung 12 auch Solleigenschaften P* vorgegeben werden, die das heiße Walzgut 1 hinter der Kühlstrecke 5 aufweisen soll. Die Solleigenschaften P* können beispielsweise gewünschte mechanische Eigenschaften wie Zugfestigkeit, Dehngrenze, Bruchgrenze usw. oder mikrokristalline Eigenschaften wie beispielsweise Anteile an Bainit, Martensit und dergleichen umfassen. Die Steuereinrichtung 12 ermittelt die Steuergröße C in diesem Fall in Abhängigkeit von den ihr vorgegebenen Eigenschaften P, P*.The at least one control variable C can be determined by the control device 12 as required. For example, actual properties P of the hot rolling stock 1 upstream of the cooling section 5 can be specified for the control device 12. The actual properties P of the hot rolling stock 1 upstream of the cooling section 5 can include, for example, its temperature T and / or at least one geometric dimension, in particular in the case of a flat rolling stock its width b or its thickness d (see also FIG FIG 1 and 4th ). As an alternative or in addition, the control device 12 can also be given target properties P * which the hot rolling stock 1 should have after the cooling section 5. The desired properties P * can include, for example, desired mechanical properties such as tensile strength, yield strength, breaking point, etc., or microcrystalline properties such as, for example, proportions of bainite, martensite and the like. The control device 12 determines the control variable C in this case as a function of the properties P, P * specified for it.

Die vorliegende Erfindung weist viele Vorteile auf. Insbesondere ist auf einfache Weise möglich, die Gefügeumwandlung beim Abkühlen des heißen Walzguts 1 unabhängig von der Kühlung zusätzlich zu beeinflussen. Die Gefügeeigenschaften des Walzguts 1 können verbessert, präziser eingestellt und vor allem vergleichmäßigt werden. Der Aufbau der Kühlstrecke 5 kann vereinfacht werden. Der Abstand zum letzten Walzgerüst 2 kann problemlos vergrößert werden.The present invention has many advantages. In particular, it is possible in a simple manner to change the structure when the hot rolling stock 1 is cooled, independently of the cooling in addition to influencing. The structural properties of the rolling stock 1 can be improved, set more precisely and, above all, evened out. The structure of the cooling section 5 can be simplified. The distance to the last roll stand 2 can be increased without any problems.

Obwohl die Erfindung im Detail durch das bevorzugte Ausführungsbeispiel näher illustriert und beschrieben wurde, so ist die Erfindung nicht durch die offenbarten Beispiele eingeschränkt und andere Varianten können vom Fachmann hieraus abgeleitet werden, ohne den Schutzumfang der Erfindung zu verlassen.Although the invention has been illustrated and described in more detail by the preferred exemplary embodiment, the invention is not restricted by the disclosed examples and other variants can be derived therefrom by the person skilled in the art without departing from the scope of protection of the invention.

BezugszeichenlisteList of reference symbols

11
WalzgutRolling stock
22
WalzgerüstRoll stand
33
ArbeitswalzenWork rolls
44th
StützwalzenBackup rolls
55
KühlstreckeCooling section
66th
KühlmediumCooling medium
77th
Haspelreel
88th
SchallgeneratoranordnungSound generator arrangement
99
SchallgeneratorenSound generators
1010
KoppeleinrichtungCoupling device
1111
Rollerole
1212th
SteuereinrichtungControl device
AA.
AmplitudenAmplitudes
bb
Breitewidth
CC.
SteuergrößeControl variable
dd
Dickethickness
ff
Frequenzfrequency
PP
IsteigenschaftenActual properties
P*P *
SolleigenschaftenTarget properties
SS.
SchallsignaleSound signals
TT
Temperaturtemperature
xx
TransportrichtungTransport direction
ϕϕ
PhasenlagenPhase positions

Claims (14)

  1. Treatment process for hot rolling stock (1) made of metal, the rolling stock (1) being rolled in at least one roll stand (2) and then cooled in a cooling section (5) arranged downstream of the at least one roll stand (2),
    characterized
    in that sound generated by means of a sound generator arrangement (8) is coupled into the rolling stock (1) by means of a coupling device (10), so that a standing sound wave is formed at least in the region of the rolling stock (1) that is located in the vicinity of the coupling device (10).
  2. Treatment process according to Claim 1,
    characterized
    in that the sound has a frequency (f) in the MHz range or above.
  3. Treatment process according to Claim 1 or 2,
    characterized
    in that the sound generator arrangement (8) is fed at least one control variable (C) by a control device (12) and in that the sound generator arrangement (8) sets a characteristic quantity (f, A, ϕ) of the sound coupled into the rolling stock (1) in dependence on the control variable (C).
  4. Treatment process according to Claim 3,
    characterized
    in that the characteristic quantity (f, A, ϕ) is a frequency (f) and/or an amplitude (A) of the sound and/or - if the sound generator arrangement (8) has a number of sound generators (9) which each independently couple a sound signal (S) into the rolling stock (1) - a phase position (ϕ) of the sound signals (S) of the sound generators (9) in relation to one another.
  5. Treatment process according to one of the preceding claims,
    characterized
    in that the control device (12) determines the at least one control variable (C) in dependence on actual properties (P) of the rolling stock (1) before the cooling section (5) and/or on setpoint properties (P*) that the rolling stock (1) is intended to have after the cooling section (5).
  6. Treatment process according to one of the preceding claims,
    characterized
    in that the coupling device (10) is a working roller (3) of the last roll stand (2) before the cooling section (5) or a roller (11) that is arranged between the last roll stand (2) and the cooling section (5) and is placed against the rolling stock (1) .
  7. Treatment process according to one of the preceding claims,
    characterized
    in that the rolling stock (1) is a flat rolling stock, in particular a strip.
  8. Treatment device for hot rolling stock (1) made of metal,
    - the treatment device having at least one roll stand (2), in which the rolling stock (1) is rolled,
    - the treatment device having a cooling section (5), which is arranged downstream of the roll stand (2) and in which the rolling stock (1) is cooled,
    characterized
    - in that the treatment device has a sound generator arrangement (8), by means of which sound is generated, and
    - in that the treatment device has a coupling device (10), by means of which the sound generated by means of the sound generator arrangement (9) is coupled into the rolling stock (1), so that a standing sound wave is formed at least in the region of the rolling stock (1) that is located in the vicinity of the coupling device (10).
  9. Treatment device according to Claim 8,
    characterized
    in that the sound generator arrangement (9) generates the sound with a frequency (f) in the MHz range or above.
  10. Treatment device according to Claim 8 or 9,
    characterized
    in that it has a control device (12), which feeds at least one control variable (C) to the sound generator arrangement (8), and in that the sound generator arrangement (8) is formed as a sound generator arrangement that can be set, so that it sets a characteristic quantity (f, A, ϕ) of the sound coupled into the rolling stock (1) in dependence on the control variable (C).
  11. Treatment device according to Claim 10,
    characterized
    in that the characteristic quantity (f, A, ϕ) is a frequency (f) and/or an amplitude (A) of the sound wave and/or - if the sound generator arrangement (8) has a number of sound generators (9) which each independently couple a sound signal (S) into the rolling stock (1) - a phase position (ϕ) of the sound signals (S) of the sound generators (9) in relation to one another.
  12. Treatment device according to one of Claims 8 to 11,
    characterized
    in that the control device (12) determines the at least one control variable (C) in dependence on actual properties (P) of the rolling stock (1) before the cooling section (5) and/or on setpoint properties (P*) that the rolling stock (1) is intended to have after the cooling section (5).
  13. Treatment device according to one of Claims 8 to 12,
    characterized
    in that the coupling device (10) is a working roller (3) of the last roll stand (2) before the cooling section (5) or a roller (11) that is arranged between the last roll stand (2) and the cooling section (5) and is placed against the rolling stock (1) .
  14. Treatment device according to one of Claims 8 to 13,
    characterized
    in that the roll stand (2) is formed as a roll stand for rolling a flat rolling stock and the cooling section (5) is formed as a cooling section for cooling the flat rolling stock.
EP18195234.2A 2018-09-18 2018-09-18 Treatment of hot rolled products made from metal Active EP3626840B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP18195234.2A EP3626840B1 (en) 2018-09-18 2018-09-18 Treatment of hot rolled products made from metal
US17/270,904 US11273476B2 (en) 2018-09-18 2019-07-30 Treatment of hot rolling stock made of metal
RU2021106899A RU2766923C1 (en) 2018-09-18 2019-07-30 Processing of hot rolled metal
CN201980061148.7A CN112673116B (en) 2018-09-18 2019-07-30 Treatment of hot rolled stock made of metal
PCT/EP2019/070503 WO2020057824A1 (en) 2018-09-18 2019-07-30 Treatment of hot rolling stock made of metal
US17/570,485 US11779971B2 (en) 2018-09-18 2022-01-07 Treatment of hot rolling stock made of metal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18195234.2A EP3626840B1 (en) 2018-09-18 2018-09-18 Treatment of hot rolled products made from metal

Publications (2)

Publication Number Publication Date
EP3626840A1 EP3626840A1 (en) 2020-03-25
EP3626840B1 true EP3626840B1 (en) 2021-03-17

Family

ID=63642744

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18195234.2A Active EP3626840B1 (en) 2018-09-18 2018-09-18 Treatment of hot rolled products made from metal

Country Status (5)

Country Link
US (2) US11273476B2 (en)
EP (1) EP3626840B1 (en)
CN (1) CN112673116B (en)
RU (1) RU2766923C1 (en)
WO (1) WO2020057824A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE542025C2 (en) * 2018-06-21 2020-02-11 Gestamp Hardtech Ab Process and apparatus for cooling hot components

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3550419A (en) 1968-03-04 1970-12-29 Thomas A Fox Methods and apparatus for metal rolling
JPS4837102B1 (en) * 1968-07-12 1973-11-09
SU734296A1 (en) * 1977-12-09 1980-05-15 Западно-Сибирский металлургический завод Device for cooling rolled stock
SU1764729A1 (en) * 1986-04-08 1992-09-30 Вологодский Политехнический Институт Method and apparatus for cooling rolled plates
SU1398943A1 (en) * 1986-12-15 1988-05-30 Донецкий политехнический институт Method of surface working of moving rolled stock with cooling medium
JPH04339505A (en) * 1991-05-15 1992-11-26 Mitsubishi Heavy Ind Ltd Roll and device for rolling foil
RU2128717C1 (en) * 1995-04-14 1999-04-10 Ниппон Стил Корпорейшн Aggregate for making stainless steel strip
US7637136B2 (en) * 2002-09-30 2009-12-29 Rinascimetalli Ltd. Method of working metal, metal body obtained by the method and metal-containing ceramic body obtained by the method
CN101850361B (en) * 2009-04-01 2012-08-22 辽宁科技大学 Solid-solid phase continuous braze welding rolling device for stainless steel composite board
CN103333995B (en) * 2013-07-05 2014-12-03 武汉理工大学 Technological method and device for ultrasound-assisted quenching
CN104438323B (en) * 2014-10-30 2016-11-30 天津理工大学 A kind of preparation method of pair of physical field auxiliary one-sided metallic laminated composite plate

Non-Patent Citations (1)

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Title
None *

Also Published As

Publication number Publication date
US20210213499A1 (en) 2021-07-15
CN112673116B (en) 2023-07-28
EP3626840A1 (en) 2020-03-25
US20220126338A1 (en) 2022-04-28
US11779971B2 (en) 2023-10-10
WO2020057824A1 (en) 2020-03-26
RU2766923C1 (en) 2022-03-16
CN112673116A (en) 2021-04-16
US11273476B2 (en) 2022-03-15

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