EP3328566B1 - Verfahren und vorrichtung zur planheitsadaptiven temperaturänderung von metallbändern - Google Patents

Verfahren und vorrichtung zur planheitsadaptiven temperaturänderung von metallbändern Download PDF

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Publication number
EP3328566B1
EP3328566B1 EP16751521.2A EP16751521A EP3328566B1 EP 3328566 B1 EP3328566 B1 EP 3328566B1 EP 16751521 A EP16751521 A EP 16751521A EP 3328566 B1 EP3328566 B1 EP 3328566B1
Authority
EP
European Patent Office
Prior art keywords
metal strip
temperature
control means
strip
flatness
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
EP16751521.2A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3328566A1 (de
Inventor
Kai-Friedrich Karhausen
Holger Aretz
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.)
Speira GmbH
Original Assignee
Hydro Aluminium Rolled Products 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 Hydro Aluminium Rolled Products GmbH filed Critical Hydro Aluminium Rolled Products GmbH
Priority to PL16751521T priority Critical patent/PL3328566T3/pl
Priority to SI201630394T priority patent/SI3328566T1/sl
Priority to RSP20191206 priority patent/RS59396B1/sr
Publication of EP3328566A1 publication Critical patent/EP3328566A1/de
Application granted granted Critical
Publication of EP3328566B1 publication Critical patent/EP3328566B1/de
Priority to HRP20191672 priority patent/HRP20191672T1/hr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • 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
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • B21B37/44—Control of flatness or profile during rolling of strip, sheets or plates using heating, lubricating or water-spray cooling of the product
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/34—Methods of heating
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D11/00—Process control or regulation for heat treatments
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C21D1/667—Quenching devices for spray quenching
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2221/00—Treating localised areas of an article

Definitions

  • the invention relates to a device for changing the temperature of a metal strip, in particular a metal strip of aluminum or an aluminum alloy, with means for temperature change of the metal strip by heating or cooling, wherein, using means for conveying the metal strip, the metal strip relative to the means for changing the temperature of the metal strip is moved in the tape direction.
  • the invention relates to a use of a device according to the invention for the continuous processing of metal strips, in particular aluminum or aluminum alloy strips.
  • the invention relates to a method for the continuous change in temperature of a metal strip, preferably an aluminum or aluminum alloy strip of a device according to the invention.
  • Metal strips for example steel strips but also aluminum or aluminum alloy strips, are usually subjected to heat treatments in order to provide specific properties of the metal strip.
  • Steel strips but also aluminum alloy strips are heated for this purpose using tempering and / or cooled very quickly.
  • the temperature ranges in which steel strips and aluminum alloy strips are heated during heat treatments differ significantly.
  • the heating of steel strips to achieve recrystallization is in the range of 950 ° C and more, whereas aluminum alloy tapes recrystallize already at temperatures around 300 ° C.
  • alloying elements must be brought into solution for later precipitation hardening, for example, whereby temperatures of around 580 ° C. must be reached. In order to subsequently maintain the alloying elements in a supersaturated state in the matrix, a rapid quenching of this temperature is required.
  • the aim of a continuous heat treatment is to change the temperature level homogeneously over the entire bandwidth in a short time in order to uniformly change the properties over the entire bandwidth in the desired manner.
  • thermally induced transverse stresses always occur, which are the cause of faults. This is due to the fact that near-center ribbon fibers are hindered under thermal stress from the neighboring fibers in the cross-flow, whereas the band edges can expand or contract freely.
  • a preferred use of the device according to the invention and a method for changing the temperature of a metal strip using the device according to the invention are proposed.
  • the individual temperature control means can raise or lower the temperature of the metal strip only in certain areas.
  • the areas that are changed by the temperature control in their temperature can be moved very accurately on the metal strip relative to each other.
  • the areas of the metal strip to be cooled and heated can be matched precisely to the avoidance of stresses in the metal strip.
  • a rigid arrangement of temperature control as it is known from the documents of the prior art, so can produce a much finer temperature change profile in the metal strip. The result is a significantly improved flatness of the metal strip both when heating the metal strips, and when cooling a heat-treated metal strip.
  • At least one tempering agent can be positioned individually in the longitudinal direction of the metal strip, in the transverse direction of the metal strip and / or at a distance from the metal strip in a translationally variable manner.
  • at least one temperature control preferably a plurality of temperature control can undergo a translational position change to improve the flatness of the metal strip during heating of the metal strip or during cooling of the metal strip.
  • the temperature control are arranged on one or both sides of the metal strip.
  • a one-sided arrangement requires less effort to install and control the positions of the individual temperature control.
  • a two-sided arrangement allows rapid temperature changes even with larger metal strip thicknesses and the realization of large temperature gradients.
  • At least one temperature control means preferably also a plurality of temperature control means is arranged individually rotatable about a rotation axis, so that by rotation the temperature control means is variably positionable in its angle to the metal strip surface.
  • the change of the angle of the temperature control to the metal strip surface makes it possible not only to shift the position of the range of action of a single temperature control, but also to change the heat or cold transmission profile on the metal strip of each temperature control.
  • the temperature control means are preferably rotated about an axis of rotation which runs parallel to the transverse direction of the strip surface. This rotation results in a band direction changing position of the action range of a single temperature control.
  • a particularly flexible adjustment of a temperature gradient on the metal strip surface can be achieved according to a further embodiment of the device in that at least one temperature control or a plurality of temperature control means with respect to all translational and rotational degrees of freedom is variably positionable.
  • the individual temperature control means according to a further embodiment with respect to their cooling or heating power separately adjustable.
  • the independent adjustment of the heating or cooling capacity of a single temperature control can be exploited to provide an additional degree of freedom for varying the position of the temperature control both in the heating of the Metal strip in the heat treatment as well as the cooling of the metal strip after the heat treatment to achieve a very good flatness of the metal strip.
  • means for measuring the flatness of the metal strip and at least one control unit which the geometric position, the geometric orientation and / or the cooling or heating power of at least one temperature control preferably a plurality of temperature control depending on the determined flatness of the Metal band controls or regulates.
  • the position, orientation and / or heating or cooling power of the individual temperature control is preferably fixed according to a predetermined profile.
  • a regulation allows a feedback of the measured flatness values to again change the position, orientation and / or the heating or cooling capacity of the individual or a plurality of temperature control means.
  • tempering agents which transmit heat to the metal strip or withdraw it from the metal strip radiatively, conductively, convectively and / or inductively can be used as temperature control means.
  • Radiant heaters are, for example, typical radiative tempering agents. Their electromagnetic heat radiation is absorbed on the metal strip.
  • conductive temperature control media media are applied to the metal strip, which directly heat or cool the metal strip.
  • Convective temperature control can heat metal bands via hot air blower, so for example by the use of hot gases.
  • Induction metal strips can also be heated by the tempering generated eddy currents in the metal strip.
  • the temperature control with respect to the transverse direction of the metal strip on an arcuate position wherein the arranged in the region of the center of the metal strip tempering are arranged leading or lagging the strip running direction.
  • the metal strip is heated or cooled in the middle area, for example, sooner or later than in the edge region.
  • each fiber can be supplied with the same amount of energy, so that a uniform temperature level is achieved. This energy supply is introduced offset in time over the width, so that the construction of cross-voltages is prevented and thus a stable strip running is ensured. Ripples of the metal strip so flatness errors are therefore significantly reduced.
  • the object indicated above is achieved by the use of a device according to the invention for the continuous processing of metal strips, in particular aluminum or aluminum alloy strips.
  • the continuous processing of, for example, aluminum or aluminum alloy strips takes place in so-called annealing lines, rolling mills but also lacquering, laminating or other coating systems which process the surface of the metal strip or the metal strip itself continuously.
  • the use of the temperature change device according to the invention leads to improved flatness results, since a very flexible and very precise possibility is provided to prevent stresses in the metal strip, in particular in the aluminum alloy strip, in a process-specific manner.
  • the above-described object is achieved by a method for continuously changing the temperature of a metal strip, preferably an aluminum or aluminum alloy strip with a device according to the invention characterized in that the temperature change of the metal strip in a heat treatment plant, in a coating plant or in a rolling mill of metal strips, preferably aluminum or aluminum alloy strips.
  • the temperature change of the metal strip is carried out using the device according to the invention in a corresponding method such that very little changes in the flatness of the metal strip occur. All downstream production steps can therefore be carried out with very high precision.
  • the position of at least one variably positionable temperature control, preferably a plurality of variably positionable temperature control relative to the metal strip is changed such that the stresses in the metal strip are reduced due to the change in temperature of the metal strip.
  • a temperature change of the metal strip with respect to the transverse direction of the metal strip arcuately to the strip running direction or lagging arranged, individual tempering, as already stated, a favorable temperature profile, in particular when heating the metal strip preferred temperature profile introduced into the metal strip, which leaves a particularly small flatness error in the metal strip.
  • the method according to the invention is further improved by measuring the flatness of the metal strip before and / or after the temperature change and, depending on the flatness measurement using control means, changing the position of the individual temperature control means relative to the metal strip ,
  • control means changing the position of the individual temperature control means relative to the metal strip .
  • an adaptation of the temperature profile to environmental conditions, to production speeds of the metal strip or to metal strip thicknesses or alloys can be adjusted to minimize the flatness error.
  • temperature control is also a change in the heating or cooling capacity of the individual temperature control in question to reduce flatness error.
  • a device for changing the temperature of a metal strip as is known from the prior art, shown in a perspective view.
  • the device for temperature change 1 consists of a so-called "tempering", which a plurality over the width and partly also over the depth of the beam, ie in the direction of tape travel, arranged temperature control having.
  • a tempering both above and below the metal strip 2 which is preferably an aluminum or aluminum alloy strip have.
  • a take-up reel 3 is shown.
  • a device according to the invention 4 for changing the temperature of a metal strip which according to the invention as a means for changing the temperature of the metal strip has a plurality of individual temperature control 5, which only heat or cool the metal strip 2 in each case.
  • At least a plurality of temperature control means are individually positionally variable in position relative to the metal strip. This is due to the double arrow and the different arrangement of the individual temperature control 5 in Fig. 2 indicated.
  • the position of the individual tempering means 5 can be adjusted depending on the flatness of the metal strip 2 after the heat treatment or before the heat treatment or their position can be changed.
  • the temperature control means 5 are individually changed in their position in the longitudinal direction of the metal strip, in the transverse direction of the metal strip and / or at a distance from the metal strip, so that a completely individual temperature profile can be introduced into a metal strip continuously changing the temperature.
  • the temperature control 5 can be set individually and independently of each other in their heating or cooling capacity, so that a further parameter is available to reduce flatness errors.
  • Fig. 3 is now a schematic side view of another embodiment of a device 4 according to the invention for changing the temperature of a metal strip 2 shown.
  • known tempering 5 which in contrast to the embodiment of Fig. 2 are only shown on a metal band side
  • means for measuring the flatness of the metal strip 6 are shown, which control or regulate the position of the individual temperature control 5 depending on the determined flatness of the metal strip via a control unit.
  • the control unit 7 controls the position of the temperature control means 5 continuously, depending on the flatness values of the metal strip 2 determined by means of the planarity measurement of the metal strip 6 Fig.
  • the control unit 7 not only exploit the translational degrees of freedom 8 for positioning the temperature control 5, but also make a rotation of the temperature control 5 by the angle ⁇ to change the acting areas of the temperature control on the metal strip 2 as precise and continuous. This ensures that a very high accuracy in the flatness of the metal strip is achieved both during heating of the metal strip, for example during annealing of the metal strip, and during cooling of the metal strip after such annealing process.
  • FIG. 4 A preferred arrangement of the temperature control on the basis of flatness measurements shows the Fig. 4 in a plan view of an embodiment of the device 4 according to the invention for the temperature change of a metal strip.
  • the tape running direction of the metal strip 2 is again indicated here by an arrow.
  • the individual temperature control means 5 are arranged arcuately with respect to the transverse direction of the metal strip and ensure, for example, that the metal strip is first heated at the edges and at a later time only the middle of the metal strip is heated by the temperature control 5.
  • a temperature profile is introduced into the strip, which leads to the lowest possible stresses within the metal strip during its transport relative to the means for changing the temperature of the metal strip in the strip direction. Indicated in Fig.
  • Fig. 4 additionally two measuring positions 6a and 6b, in which the flatness of the metal strip is either leading to control the position of the temperature control 5 or lagging to control the flatness of the metal strip.
  • the temperature change takes place as in Fig. 4 can be seen, preferably continuously.
  • the device according to the invention is therefore particularly suitable for stress-free heating of metal strips, preferably aluminum alloy strips for heat treatment, in particular annealing.
  • the device according to the invention is likewise suitable for introducing a temperature profile into the metal strip during cooling of the metal strip, for example after a heat treatment, which leaves as low a tension as possible after cooling the metal strip to, for example, room temperature.
  • the device according to the invention in heat treatment systems for the treatment of metal strips consisting of aluminum alloys.
  • Type AA6xxx or composites with aluminum alloys of the type AA6XXX used since the flatness of these products plays a very important role in further processing.
  • FIGS. 5 and 6 various arrangements of the plurality of temperature control means are shown schematically, which heat the aluminum alloy strip 2 before winding on a reel 3 without contact or as in Fig. 6 Cool down. In doing so, an ideal heat conduction is assumed. The effect of the different arrangements on the stresses in the aluminum alloy strip 2 was calculated and the amplitude of the resulting wave formation was determined.
  • the initial temperature of the strip is 20 ° C before heating.
  • the heating of the aluminum alloy strip is carried out at 400 ° C after passing through a band area under the respective temperature control.
  • a subsequent cooling was taken into account by heat transfer to the ambient air as well as winding on a rigid coil in order to take into account realistic as possible boundary conditions.
  • the tape thickness was assumed to be 1 mm.
  • the aluminum alloy strip was cooled from a homogeneous temperature of 400 ° C to 20 ° C after passing through a temperature control and taken apart from heat transfer to the environment identical boundary conditions as in the heating.
  • the simulations assumed a constant belt tension of 10 MPa at a belt width of 1500 mm and a belt speed of approximately 11.3 m / s.
  • the heat transfer of the individual tempering on the tape was carried out in the calculations over a length in the tape direction of 250 mm and a width transverse to the tape direction of 100 mm.
  • eleven symmetrically distributed over the width of the band tempering have been considered above and below the band.
  • the calculations are based on a thermo-mechanical simulation of stress and strain states of the aluminum alloy strip using the finite element method (FEM).
  • FEM finite element method
  • the aluminum alloy strip was assigned an elasto-plastic material behavior.
  • the tape 2 was moved in the direction of the arrow.
  • the calculated amplitudes of the wave formation ie the difference between the highest and lowest point of the band, are shown in Table 1 for the various arrangements.
  • Table 1 attempt Type of temperature change Wave amplitude [mm] A Heat 22.8 B Heat 37.1 C Heat 36.5 D Heat 21.9 e Heat 19.9 F Heat 16.1 G cooling down 47.6 H cooling down 23.3

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Control Of Heat Treatment Processes (AREA)
  • Control Of Metal Rolling (AREA)
EP16751521.2A 2015-07-28 2016-07-27 Verfahren und vorrichtung zur planheitsadaptiven temperaturänderung von metallbändern Active EP3328566B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PL16751521T PL3328566T3 (pl) 2015-07-28 2016-07-27 Sposób i urządzenie do dostosowanej do płaskości zmiany temperatury taśm metalowych
SI201630394T SI3328566T1 (sl) 2015-07-28 2016-07-27 Postopek in naprava za spreminjanje temperature kovinskih trakov, ki se prilagaja sploščenosti
RSP20191206 RS59396B1 (sr) 2015-07-28 2016-07-27 Postupak i uređaj za promenu temperature metalne trake adaptiranu prema ravnosti trake
HRP20191672 HRP20191672T1 (hr) 2015-07-28 2019-09-17 Postupak i uređaj za mijenjanje temperatura metalnih traka na način prilagodljiv prema plosnatosti

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015112293.6A DE102015112293A1 (de) 2015-07-28 2015-07-28 Verfahren und Vorrichtung zur planheitsadaptiven Temperaturänderung von Metallbändern
PCT/EP2016/067933 WO2017017150A1 (de) 2015-07-28 2016-07-27 Verfahren und vorrichtung zur planheitsadaptiven temperaturänderung von metallbändern

Publications (2)

Publication Number Publication Date
EP3328566A1 EP3328566A1 (de) 2018-06-06
EP3328566B1 true EP3328566B1 (de) 2019-08-28

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EP16751521.2A Active EP3328566B1 (de) 2015-07-28 2016-07-27 Verfahren und vorrichtung zur planheitsadaptiven temperaturänderung von metallbändern

Country Status (12)

Country Link
US (1) US10676807B2 (pl)
EP (1) EP3328566B1 (pl)
CN (1) CN107848001B (pl)
DE (1) DE102015112293A1 (pl)
ES (1) ES2746956T3 (pl)
HR (1) HRP20191672T1 (pl)
HU (1) HUE046231T2 (pl)
LT (1) LT3328566T (pl)
PL (1) PL3328566T3 (pl)
RS (1) RS59396B1 (pl)
SI (1) SI3328566T1 (pl)
WO (1) WO2017017150A1 (pl)

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EP3314028B1 (en) 2015-06-24 2020-01-29 Novelis Inc. Fast response heaters and associated control systems used in combination with metal treatment furnaces
DE102015215179A1 (de) * 2015-08-07 2017-02-09 Schwartz Gmbh Verfahren zur Wärmebehandlung und Wärmebehandlungsvorrichtung
DE102017107549A1 (de) * 2017-04-07 2018-10-11 Schwartz Gmbh Temperierstation zur partiellen Wärmebehandlung eines metallischen Bauteils
CN110116141A (zh) * 2018-02-07 2019-08-13 宝山钢铁股份有限公司 一种自适应镁合金板带温轧过程温度分布的加热系统
US11192159B2 (en) 2018-06-13 2021-12-07 Novelis Inc. Systems and methods for quenching a metal strip after rolling
WO2021006997A1 (en) * 2019-07-08 2021-01-14 Aleris Rolled Products, Inc. Methods and systems for measuring flatness of aluminum alloy sheet in a heat treating furnace
CN113186383A (zh) * 2021-04-13 2021-07-30 燕山大学 用于钎钢的加热装置及其加热方法
CN113894166B (zh) * 2021-10-11 2023-07-28 中冶南方工程技术有限公司 一种用于带钢感应加热的装置
CN116640913A (zh) * 2023-06-02 2023-08-25 苏州好特斯模具有限公司 一种螺牙激光热处理装置及方法

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Also Published As

Publication number Publication date
DE102015112293A1 (de) 2017-02-02
CN107848001A (zh) 2018-03-27
LT3328566T (lt) 2019-10-10
US10676807B2 (en) 2020-06-09
SI3328566T1 (sl) 2019-11-29
HUE046231T2 (hu) 2020-02-28
CN107848001B (zh) 2021-05-04
EP3328566A1 (de) 2018-06-06
HRP20191672T1 (hr) 2019-12-13
ES2746956T3 (es) 2020-03-09
PL3328566T3 (pl) 2020-01-31
RS59396B1 (sr) 2019-11-29
US20180135156A1 (en) 2018-05-17
WO2017017150A1 (de) 2017-02-02

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