EP1456421B1 - Procede et dispositif pour dresser et refroidir de maniere regulee un feuillard metallique large, notamment un feuillard d'acier ou une tole, sortant d'un laminoir a chaud pour feuillards - Google Patents

Procede et dispositif pour dresser et refroidir de maniere regulee un feuillard metallique large, notamment un feuillard d'acier ou une tole, sortant d'un laminoir a chaud pour feuillards Download PDF

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Publication number
EP1456421B1
EP1456421B1 EP02785402A EP02785402A EP1456421B1 EP 1456421 B1 EP1456421 B1 EP 1456421B1 EP 02785402 A EP02785402 A EP 02785402A EP 02785402 A EP02785402 A EP 02785402A EP 1456421 B1 EP1456421 B1 EP 1456421B1
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EP
European Patent Office
Prior art keywords
cooling
strip
metal strip
rollers
straightening
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.)
Expired - Lifetime
Application number
EP02785402A
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German (de)
English (en)
Other versions
EP1456421A1 (fr
Inventor
Andreas Mathies
Dirk Schmidt
Gerhard Horn
Roman Dehmel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Siemag AG
Original Assignee
SMS Demag AG
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Filing date
Publication date
Application filed by SMS Demag AG filed Critical SMS Demag AG
Publication of EP1456421A1 publication Critical patent/EP1456421A1/fr
Application granted granted Critical
Publication of EP1456421B1 publication Critical patent/EP1456421B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/573—Continuous furnaces for strip or wire with cooling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • 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
    • C21D8/0242—Flattening; Dressing; Flexing
    • 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
    • C21D8/0252—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment with application of tension
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C21D1/667—Quenching devices for spray quenching
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D11/00—Process control or regulation for heat treatments
    • C21D11/005—Process control or regulation for heat treatments for cooling

Definitions

  • the invention relates to a method and a device for the controlled straightening and cooling of expiring from a hot strip rolling, wide metal strip, in particular steel strip or sheet, using crimping rollers, which are arranged in the strip running direction behind a double role with two vertically superposed single rollers and create a longitudinal tensile stress.
  • the initially described method and the device are essentially known from DE 33 13 024 A1.
  • This is a method and a device for quenching continuous steel sheets, in particular coarse and medium plates, with simultaneous controlled straightening, in which the sheets are aligned in a plane before quenching in the warm state by at least two successively arranged vertical double roles , Subsequently, the sheet is pulled under a controlled tension of at least one double roll through a quenching device.
  • This method is intended to deter transit steel sheets exactly to the predetermined mechanical properties, without warping or distortion occur, while at the same time already existing bumps should be reduced. Despite these measures occur repeatedly unevenness of the sheet, which are due to inadequate application of the tensile stresses on a disadvantageous cooling and other unfavorable control measures.
  • the applied in practice cooling devices consisting essentially of nozzle elements or for the after-cooling of laminar water curtains can hardly be improved.
  • a U-tube is used in principle.
  • nozzles can be selected with appropriate Parameters achieve the highest achievable cooling capacities.
  • Another disadvantage is the poor control and regulation behavior in general and at low flow rates in particular.
  • the invention has for its object to expand the application of conventional sheet metal cooling systems to higher flatness of the sheet with increased cooling effect.
  • the object is achieved according to the invention with a method according to claim 1 or a device according to claim 7.
  • the metal strip or sheet is placed between a pre-straightener and a spray cooling without cooling by controlling the tension under defined tensile stresses and within the spray cooling between each other cooled following pairs of squeezing rollers and additionally controls the tension.
  • the tension in the metal strip or sheet within the spray cooling between each two in the strip running direction successive pairs of squeezing rollers additionally regulated and the metal strip additionally cooled.
  • a plastic deformation is effected directly before the shrinkage of the metal strip or the sheet in the cooling.
  • the plastic deformation reduces the incoming unevenness of the metal strip or sheet.
  • the advantage continues to be the immediate arrangement of the straightening process before cooling, whereby the re-build up of residual stresses and deformations caused by the uneven-moderate cooling on the surface of the metal strip or the sheet is avoided.
  • the cooling effect is practically limited by the induction of stresses and associated deformations in the sheet, due to the non-uniform cooling effect of the cooling medium (water) on the sheet surface.
  • This (disadvantageous) effect is particularly evident when using higher cooling capacity on thin and at the same time wide metal sheets.
  • the critical product of a plant is given by a sheet of the smallest thickness with maximum width and high intensity of cooling.
  • the intensity of the cooling is defined by a high temperature difference between start and cooling stop temperature with a short cooling time.
  • pinch rollers should hinder this effect of deformation.
  • the influence of this form of compensation is limited.
  • the inventive arrangement of the pre-straightening machine before cooling causes plastic deformation and reduces incoming deformations and stresses immediately before cooling.
  • the deformation can be combated particularly effectively when entering the cooling by the tension is controlled by switching the speed to the next, last, bearing squeeze roller with progressive passage of the metal strip or the sheet.
  • the pinch rollers are defined with a pitch, wherein between two pinch rollers depending on the division, a cooling unit is formed.
  • this division is turned off to half the length of the resulting eigenform for a band or a sheet with the smallest thickness, maximum width and high cooling intensity.
  • the device for the controlled straightening and cooling of a wide strip of metal running out of a hot strip rolling mill, in particular of a steel strip or a sheet comprises a spray cooling with a double roll, which has two single rolls arranged one above the other, at least one first arranged behind the double roll in the strip running direction A pair of squeezing rollers and a cooling unit arranged between the double roller and the first pair of squeezing rollers, wherein in the metal belt or plate guided by the spray cooling a longitudinal tension between the Doppelrollle and the first pair of squeezing rollers can be generated.
  • the stated object is achieved according to the invention in such a device that a pre-straightening machine with straightening rollers and associated rotary drive motors passed through by the metal strip is provided for setting the metal strip under defined tension conditions without cooling between the pre-straightening machine and the double roller.
  • a tensile stress can be transmitted even before the cooling, whereby the size of the existing deformations is already reduced here. Then there is an even more accurate determination of the tensile stresses within the cooling units.
  • the influence of cooling can be further increased by the cooling unit is provided with finely adjustable cooling elements in the outlet of the metal strip.
  • the cooling can also be developed in such a way that the cooling unit is designed for a high and / or an average cooling capacity in the sense of a given product spectrum.
  • An improvement of the invention consists in the fact that between the last, bearing squeezing rollers or the straightening rollers at the end of the metal strip or the sheet and the squeezing rollers or the straightening rollers at the beginning of the metal strip or sheet tensile stresses are also generated.
  • the metal in particular the steel strip 1 or the sheet is for controlled cooling and straightening using in the direction of tape 2 behind a double role, the two vertically stacked single rollers 3 and 4, arranged squeezing rollers 5 acting in a longitudinal direction (tape running direction 2) Tensile 6 out.
  • the spray cooling 8 consists of cooling units 9 each arranged between two pairs of pinch rollers 5a (FIG. 1).
  • the tension 6 is controlled via a corresponding torque 11 by a feedback control 12 controlled by (A) engagement of the pinch rollers 5 (i) to (i + nc). As soon as the band end 1a passes through (B) engagement of the pinch rollers 5 ((i + 1) to (i + nc + 1)), the corresponding tension 6 is transmitted to the band end 1 a and only outside the band end 1a the comparison speed is measured without using the feedback control 12. Both for the end of the tape 1 a and the beginning of the tape 1 b, the tension 6 is controlled by switching the speed to each next, last, bearing squeeze roller 5 with progressive passage of the metal strip 1 (see Fig .. 1).
  • the pinch rollers 5 are arranged with a certain pitch 13, wherein the cooling unit 9 is formed between two pinch rollers 5 depending on the pitch 13.
  • the pitch 13 can be related to a half length 14 of the resulting wavelength 15 for a metal strip 1 with the smallest thickness, maximum width and high cooling intensity.
  • the typical wavelength 15 is established (FIG. 2A).
  • the cooling units 9 are each designed for a high or an average cooling intensity (FIG. 2B), the pitch 13 corresponding to half the wavelength 15 (see FIG. 2B).
  • the waveform 16 is made clear in FIGS. 2A and 2B by dotted lines 17.
  • FIG. 3 shows the cooling effect of the individual different types of cooling units 9.
  • the solid line represents the temperature profile in the strip or sheet center 20 and the dashed line the surface temperature 21.
  • injection cooling units 8a are used.
  • cooling units 9 consisting of U-tube - units 22 are provided.
  • the temperature ⁇ T surface is still reached in the zone of the injection cooling units 8a.
  • the required cooling stop temperature is achieved in small steps through the U-tube units 22. Martensite formation by surface supercooling is prevented above the temperature T-martensite.
  • FIG. 4 an overall system is shown in which the spray cooling 8 with the pinch roller pairs 5a and the cooling units 9 and, behind them, a laminar cooling device 25 follow in the direction of striping 2 on the pre-straightening machine 7.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Metal Rolling (AREA)
  • Control Of Heat Treatment Processes (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)

Claims (12)

  1. Procédé pour le dressage et le refroidissement contrôlés d'un feuillard métallique large (1), en particulier d'un feuillard d'acier ou d'une tôle (1), sortant d'un laminoir à chaud pour feuillards, dans lequel le feuillard métallique ou la tôle est guidé(e) à l'intérieur d'un poste de refroidissement par projection (8) tout d'abord à travers un rouleau double qui comprend deux rouleaux individuels (3, 4) agencés verticalement l'un au-dessus de l'autre, et ensuite à travers au moins une première paire de rouleaux écraseurs (5a) agencée derrière le rouleau double (3, 4) en direction de circulation (2) du feuillard ; le feuillard métallique traverse une première unité de refroidissement (9) entre le rouleau double (3, 4) et la première paire de rouleaux écraseurs (5a) ; et on génère entre le rouleau double (3, 4) et la première paire de rouleaux écraseurs (5a) dans le feuillard métallique une contrainte de traction agissant en direction longitudinale,
    caractérisé en ce que
    avant son entrée dans le rouleau double (3, 4), le feuillard métallique (1) ou la tôle traverse une machine de pré-dressage (7) pourvue de rouleaux dresseurs et de moteurs d'entraînement en rotation associés ; et ne traverse pas d'unité de refroidissement (9) entre la machine de pré-dressage (7) et le rouleau double (3, 4), mais est soumis à des contraintes de traction définies par régulation des moteurs d'entraînement en rotation pour les rouleaux dresseurs de la machine de pré-dressage (7).
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    la contrainte de traction dans le feuillard métallique ou dans la tôle à l'intérieur du poste de refroidissement par projection (8) est réglée en supplément entre deux paires de rouleaux écraseurs (5a) respectives successives en direction de circulation de feuillard (2).
  3. Procédé selon la revendication 2,
    caractérisé en ce que
    le feuillard métallique ou la tôle est refroidi(e) en supplément entre les paires de rouleaux écraseurs (5a) successives.
  4. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que
    la contrainte de traction est réglée par modification de la vitesse vers le prochain, dernier rouleau écraseur porteur respectif au cours de la progression du feuillard métallique ou de la tôle.
  5. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que
    les rouleaux écraseurs sont fixés avec un pas, une unité de refroidissement étant formée en fonction du pas entre deux rouleaux écraseurs.
  6. Procédé selon la revendication 5,
    caractérisé en ce que
    ce pas est ajusté à une demi-longueur de la forme propre résultante pour un feuillard métallique ou pour une tôle d'épaisseur minimale, de largeur maximale et d'intensité de refroidissement élevée.
  7. Dispositif pour le dressage et le refroidissement contrôlés d'un feuillard métallique large (1) ou d'une tôle, en particulier d'un feuillard d'acier ou d'une tôle (1), sortant d'un laminoir à chaud pour feuillards, comportant :
    un poste de refroidissement par projection (8) comportant un rouleau double qui comprend deux rouleaux individuels (3, 4) agencés verticalement l'un au-dessus de l'autre,
    au moins une première paire de rouleaux écraseurs (5a) agencée derrière le rouleau double en direction de circulation de feuillard (2), et une première unité de refroidissement (9) agencée entre le rouleau double (3, 4) et la première paire de rouleaux écraseurs (5a),
    dans lequel
    dans le feuillard métallique ou dans la tôle guidé(e) à travers le poste de refroidissement par projection (8), une contrainte de traction agissant en direction longitudinale peut être générée entre le rouleau double (3, 4) et la première paire de rouleaux écraseurs (5a),
    caractérisé en ce que
    il est prévu une machine de pré-dressage (7) traversée par le feuillard métallique et agencée en amont du poste de refroidissement par projection (8), pourvue de rouleaux dresseurs et de moteurs d'entraînement en rotation associés, et destinée à mettre sous des contraintes de traction définies le feuillard métallique entre la machine de pré-dressage (7) et le rouleau double (3, 4), sans refroidissement, par régulation des moteurs d'entraînement en rotation pour les rouleaux dresseurs de la machine de pré-dressage (7).
  8. Dispositif selon la revendication 7,
    caractérisé par
    une commande à rétroaction pour contrôler la contrainte de traction entre deux paires de rouleaux écraseurs (5a) par un contrôle des couples de rotation.
  9. Dispositif selon la revendication 8,
    caractérisé en ce que
    une unité de refroidissement respective (9) est prévue entre deux paires de rouleaux écraseurs (5a).
  10. Dispositif selon l'une des revendications 7 à 9,
    caractérisé en ce que
    à la sortie (18) du feuillard métallique (1), l'unité de refroidissement (9) est pourvue d'éléments de refroidissement (19) finement réglables.
  11. Dispositif selon l'une des revendications 7 à 10,
    caractérisé en ce que
    l'unité de refroidissement (9) est conçue pour des performances de refroidissement élevées et/ou moyennes dans le sens d'un spectre de produits prédéterminé.
  12. Dispositif selon l'une des revendications 7 à 11,
    caractérisé en ce que
    des contraintes de traction (6) peuvent également être générées entre les derniers rouleaux écraseurs porteurs (5) ou les rouleaux dresseurs (23) à l'extrémité (1a) du feuillard métallique (1) ou de la tôle, et les rouleaux écraseurs (5) ou les rouleaux dresseurs (24) au début du feuillard métallique (1).
EP02785402A 2001-12-20 2002-11-21 Procede et dispositif pour dresser et refroidir de maniere regulee un feuillard metallique large, notamment un feuillard d'acier ou une tole, sortant d'un laminoir a chaud pour feuillards Expired - Lifetime EP1456421B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10163070 2001-12-20
DE10163070A DE10163070A1 (de) 2001-12-20 2001-12-20 Verfahren und Einrichtung zum kontrollierten Richten und Kühlen von aus einem Warmband-Walzwerk auslaufendem breiten Metallband, insbesondere von Stahlband oder Blech
PCT/EP2002/013035 WO2003054236A1 (fr) 2001-12-20 2002-11-21 Procede et dispositif pour dresser et refroidir de maniere regulee un feuillard metallique large, notamment un feuillard d'acier ou une tole, sortant d'un laminoir a chaud pour feuillards

Publications (2)

Publication Number Publication Date
EP1456421A1 EP1456421A1 (fr) 2004-09-15
EP1456421B1 true EP1456421B1 (fr) 2006-05-31

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EP02785402A Expired - Lifetime EP1456421B1 (fr) 2001-12-20 2002-11-21 Procede et dispositif pour dresser et refroidir de maniere regulee un feuillard metallique large, notamment un feuillard d'acier ou une tole, sortant d'un laminoir a chaud pour feuillards

Country Status (13)

Country Link
US (2) US20050016643A1 (fr)
EP (1) EP1456421B1 (fr)
JP (1) JP4440643B2 (fr)
CN (1) CN100402672C (fr)
AT (1) ATE328123T1 (fr)
AU (1) AU2002350708A1 (fr)
BR (1) BR0214598A (fr)
CA (1) CA2469073C (fr)
DE (2) DE10163070A1 (fr)
ES (1) ES2261757T3 (fr)
RU (1) RU2307718C2 (fr)
UA (1) UA77241C2 (fr)
WO (1) WO2003054236A1 (fr)

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EP2486991B1 (fr) 2009-10-07 2017-01-25 Nippon Steel & Sumitomo Metal Corporation Procédé de refroidissement pour laminage à chaud

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Publication number Priority date Publication date Assignee Title
EP2486991B1 (fr) 2009-10-07 2017-01-25 Nippon Steel & Sumitomo Metal Corporation Procédé de refroidissement pour laminage à chaud

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RU2004122098A (ru) 2005-03-27
RU2307718C2 (ru) 2007-10-10
ATE328123T1 (de) 2006-06-15
DE10163070A1 (de) 2003-07-03
CN1606630A (zh) 2005-04-13
JP2005512816A (ja) 2005-05-12
CN100402672C (zh) 2008-07-16
US20050016643A1 (en) 2005-01-27
UA77241C2 (en) 2006-11-15
JP4440643B2 (ja) 2010-03-24
DE50207037D1 (de) 2006-07-06
CA2469073A1 (fr) 2003-07-03
ES2261757T3 (es) 2006-11-16
CA2469073C (fr) 2011-10-11
AU2002350708A1 (en) 2003-07-09
BR0214598A (pt) 2004-11-03
WO2003054236A1 (fr) 2003-07-03
EP1456421A1 (fr) 2004-09-15
US20120024435A1 (en) 2012-02-02

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