EP2176016B1 - Procédé et dispositif d'uniformisation du transfert thermique d'un produit coulé pendant sa solidification sur la bande transporteuse métallique d'une installation de coulée horizontale sur bande - Google Patents

Procédé et dispositif d'uniformisation du transfert thermique d'un produit coulé pendant sa solidification sur la bande transporteuse métallique d'une installation de coulée horizontale sur bande Download PDF

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Publication number
EP2176016B1
EP2176016B1 EP08785302.4A EP08785302A EP2176016B1 EP 2176016 B1 EP2176016 B1 EP 2176016B1 EP 08785302 A EP08785302 A EP 08785302A EP 2176016 B1 EP2176016 B1 EP 2176016B1
Authority
EP
European Patent Office
Prior art keywords
strip
cast product
cooling
metal
transport belt
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
EP08785302.4A
Other languages
German (de)
English (en)
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EP2176016A1 (fr
Inventor
Jörg BAUSCH
Hans Jürgen HECKEN
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 Group GmbH
Original Assignee
SMS Group 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 SMS Group GmbH filed Critical SMS Group GmbH
Publication of EP2176016A1 publication Critical patent/EP2176016A1/fr
Application granted granted Critical
Publication of EP2176016B1 publication Critical patent/EP2176016B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0631—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a travelling straight surface, e.g. through-like moulds, a belt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/1226—Accessories for subsequent treating or working cast stock in situ for straightening strands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/14—Plants for continuous casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/14—Plants for continuous casting
    • B22D11/143—Plants for continuous casting for horizontal casting

Definitions

  • the invention relates to a method and a device for close-to-near-net casting of rectangular metal strands and subsequent further processing to metal strips by the DSC process (direct strip casting) in a horizontal strip casting, wherein the molten metal by means of a melt delivery system on a cooled at the bottom horizontally encircling Metal conveyor belt is poured and solidifies the liquid cast product on this metal conveyor belt during its transport to the pre-band, which is then conveyed to a driver after leaving the metal conveyor belt - mechanically clamped for example by smoothing / driving rollers.
  • the structure with smoothing / driving rollers is not absolutely necessary, the structure can also be realized without these roles.
  • the top of the belt is cooled only by convection with the ambient atmosphere and by heat radiation, while its bottom in direct contact with a cooled Metal conveyor belt is stationary, the band already deformed during solidification and then first up and then down.
  • the lowermost material layer of the band contracts most strongly due to very large temperature gradients.
  • the entire band curves upwards in the middle, with very high stresses being introduced in the upper layer. Since these stresses are greater than the yield stress, they degrade in the course of solidification by elongation (flow) again, resulting in an opposite curvature of the Band center down gives. As a result, the lower layer remains initially elongated, the upper one shortened.
  • the thermal expansion also equals itself.
  • the upper shortened and the lower elongated band areas now cause a backward curvature, whereby the band edges bulge upwards.
  • the stresses occurring below or below the yield point so that no or a very small regression of the curvature can be observed by flow processes.
  • the upward curvature remains and results in a bowing of the narrow sides of the tape and also of the tape head similar to a ski.
  • the guide element consists of several above and below the pre-strip in top to top or mutually offset roles.
  • the pre-strip is guided into a plane lying above the casting line in order to absorb the elongation of the underside of the pre-strip by the upward movement thereby carried out.
  • a roller assembly in which the sub-band undulating passes through the set of rollers is possible, but has not been used.
  • a disadvantage of the WO 2006/066552 A1 known method is that by the metal conveyor belt subsequent guide element a sweeping influence on the thermal processes on the metal conveyor belt is only incomplete possible.
  • the WO 2006/066552 relates to a method and an apparatus for horizontal strip casting of steel, wherein a cooled conveyor belt having pulleys at its two ends, further comprising an adjoining housed roller conveyor.
  • the invention is based on the objective task that the device and the method for near-net-shape casting of strands of metal should be improved so that deformation of the metal strip are avoided as much as possible, especially in the area of the conveyor belt ,
  • Characteristic of the inventive method is that to avoid a possible up to the pouring of the casting rear buckling of the strip edges and to homogenize the heat transfer to the cast product during its solidification on the metal conveyor belt when leaving the conveyor belt abruptly reduced cooling of the underside of the pre-strip is compensated What is additionally cooled in an area immediately behind the conveyor belt, the underside of the Vorbandes.
  • the required pressure is applied for this purpose by acting on the entire width of the cast product pressure roller or by acting only on the band edges partial pressure rollers.
  • the pressure rollers are preferably driven separately and cooled inside.
  • the required pressure can also be applied by a circumferential pressure belt resting on the entire width of the cast product, which likewise can be driven and cooled separately.
  • FIG. 1 is a side view of a strip casting 1 according to the DSC method shown with its essential components.
  • this system consists of the actual casting machine 2 with the ladle 2 ', a distributor channel 3, a melt delivery system 3' and a circulating metal conveyor belt 7.
  • the length of the metal conveyor belt 7 is designed so that the residence time of the cast product 4 on the metal conveyor belt 7 is sufficient for its extensive solidification to the pre-strip 5.
  • the metal conveyor belt 7, which has only a thickness of about 1 mm, for example, is driven and guided by two deflection rollers 8, 9 and, for example, a tensioning roller 10.
  • a follower dam block chain 15 is arranged on each side of the metal conveyor belt 7.
  • a pressure roller 11 is arranged above the cast product 4 in the region of the deflection roller 8 located at the end of the metal conveyor belt 7.
  • FIG. 2a an enlarged part of the Fig. 1 , is in addition to the pressure roller 11, which acts from the top with a certain pressure on the cast product 4, this in combination according to the invention carried out additional cooling the underside of the pre-strip 5 in the form of spray cooling 17 is located.
  • This cooling is adjusted so that it acts only in a defined area, which can extend over the entire width of the pre-strip 5 and in the illustrated embodiment extends from the end of the metal conveyor belt 7 to the first of the lower smoothing / driving rollers 14.
  • FIG. 2b An alternative cooling of the pre-strip 5 in the form of a closed cooling is in the FIG. 2b shown.
  • This cooling which also takes place only in a defined area immediately behind the deflection roller 8, is performed with a circulating cooling belt 19, 19 '.
  • a circulating cooling belt 19, 19 ' As in the spray cooling 17 of Fig. 2a represented only the underside of the pre-strip 5 by a cooling belt arranged there 19 and / or optionally also the Vorbandoberseite by a arranged on the upper side of the pre-strip 5 further cooling belt 19 'are cooled.
  • FIGS. 3 to 6 FIGS. 1 and 2 shown in a perspective plan view.
  • FIG. 3a shows by way of example a part of the strip caster 1 from the distributor trough 3 / melt delivery system 3 'to the end of the metal conveyor belt 7 according to the prior art.
  • the line “A” represents a cross section through the cast product 4 in the front half of the metal conveyor belt 7
  • the line “B” shows a cross section through the cast product 4 at the end of the metal conveyor belt 7
  • the line "C” represents a cross section through the solidified Vorband 5, which rests after leaving the metal conveyor belt 7 on a roller table 7 '.
  • a strip casting machine 1 In a strip casting machine 1 according to the prior art the cast product 4 dissolves from its base, the metal conveyor belt 7, and bulges steadily with its band edges 6. This warping begins in the form of a wedge-shaped bulge region 18 with an increasing amount approximately in the region of the cross-section line "A", so that finally, after leaving the metal conveyor belt 7 (in the region of the cross-section line "C"), the drawn final state is established.
  • FIG. 4a the change in the warping of the strip edges 6 occurring as a result of the use of a pressure roller 11 arranged in the region of the cross-section line "B" is shown.
  • the bulge region 18 of the band edges 6 begins only from the cross-sectional line "B” with a significantly reduced absolute amount.
  • the pressure roller 11 also acts backwards, with the effect of suppressing the bulging of the band edges 6, back to the region of the cross-sectional line "A".
  • the further forward bowing of the band edges 6 to the cross-sectional line "C” can not be completely suppressed by the pressure roller 11, but is significantly lower than in the Fig. 3a without pressure roller 11.
  • the object of the invention to ensure complete contact of the cast product 4 with its base, the metal conveyor belt 7 is thus completely fulfilled by the use of the pressure roller 11.
  • FIG. 5 are used as an alternative to the pressure roller 11 in the same area at the end of the metal conveyor belt 7 partial pressure rollers 12 as a printing device, which act exclusively on the belt edges 6.
  • the effect achieved by this measure, as is clear by the marked bulge region 18, with the operation of a pressure roller 11 is quite comparable.
  • the invention is not limited to the illustrated embodiments, but may also be carried out with respect to the applied printing devices and devices for additional cooling with deviating from the description of aggregates, if the inventive method also hereby possible.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)

Claims (13)

  1. Procédé de coulée proche de leurs dimensions finales de profilés rectangulaires en métal, suivie d'un traitement ultérieur selon la méthode DSC (Direct Strip Casting) dans une installation de coulée en bande horizontale (1), dans lequel le métal en fusion est coulé au moyen d'un système d'entrée de matière fondue (3') sur une bande transporteuse (7) sans fin horizontale en métal refroidie sur sa face inférieure et le produit coulé liquide (4) se solidifie sur cette bande transporteuse métallique (7) pendant son transport vers une pré-bande (5), le produit étant ensuite transporté sous contrainte mécanique vers un entraîneur (16) après avoir quitté la bande métallique (7), et pour créer un contact maximum du produit liquide sur la bande métallique (7), un dispositif de pression (11, 12 13) situé au-dessus de la pré-bande (5) dans la zone en aval de l'extrémité de la bande métallique (7) presse le produit se solidifiant du haut vers la pré-bande (5),
    caractérisé en ce que,
    pour éviter un soulèvement possible vers l'arrière des bords (6) du profilé dans la zone de coulée de la machine (2) et pour homogénéiser le transfert de chaleur sur le produit coulé (4) durant sa solidification sur la bande transporteuse métallique (7), la diminution brutale de refroidissement de la face inférieure de la pré-bande (5) lorsque le produit quitte la bande métallique (7) est compensée, grâce à un refroidissement additionnel de la face inférieure de la pré-bande (5) dans une zone directement après la bande transporteuse métallique (7).
  2. Procédé selon la revendication 1, caractérisé en ce qu'un rouleau presseur (11) agissant sur la totalité de la largeur du produit coulé (4) est utilisé comme dispositif de pression.
  3. Procédé selon la revendication 1, caractérisé en ce que des rouleaux presseurs (12) agissant respectivement sur les bords (6) du produit sont utilisés comme dispositif de pression.
  4. Procédé selon la revendication 1, caractérisé en ce qu'une bande de pression sans fin (13) agissant sur la totalité de la largeur du produit coulé (4) est utilisée comme dispositif de pression.
  5. Procédé selon la revendication 2, 3 ou 4, caractérisé en ce que les dispositifs de pression (11,12,13) sont entraînés et refroidis séparément.
  6. Procédé selon la revendication 1, 2, 3, 4 ou 5, caractérisé en ce que en présence de rouleaux lisses ou d'entraînement (14), la zone de refroidissement additionnel de la face inférieure de la pré-bande (5) s'étend jusqu'à ces rouleaux (14).
  7. Procédé selon la revendication 6, caractérisé en ce que le refroidissement additionnel est réalisé au moyen d'un refroidissement ouvert à pulvérisation (17) et/ou d'un refroidissement fermé par une bande sans fin de refroidissement (19, 19').
  8. Dispositif pour la coulée proche de leurs dimensions finales de profilés rectangulaires en métal, suivie d'un traitement ultérieur selon la méthode DSC (Direct Strip Casting) dans une installation de coulée en bande horizontale (1), dans lequel le métal en fusion est coulé au moyen d'un système d'entrée de matière fondue (3') sur une bande transporteuse (7) sans fin horizontale en métal refroidie sur sa face inférieure et le produit coulé liquide (4) se solidifie sur cette bande transporteuse métallique (7) pendant son transport vers une pré-bande (5), le produit étant ensuite transporté sous contrainte mécanique vers un entraîneur (16) après avoir quitté la bande métallique (7), un dispositif de pression (11, 12 13) étant prévu au-dessus du produit (4) dans la zone en aval du rouleau (8) de la bande métallique (7), le dispositif de pression (11, 12, 13) étant apte à exercer une pression réglable par le dessus sur le produit (4) solidifiant sur la pré-bande (5),
    caractérisé par
    un dispositif de refroidissement (17, 19, 19') pour le refroidissement de la face inférieure de la pré-bande (5) sur toute sa largeur directement après la bande transporteuse métallique (7).
  9. Dispositif selon la revendication 8, caractérisé en ce que le dispositif de pression est un rouleau presseur (11) entraîné, agissant sur la totalité de la largeur du produit coulé (4).
  10. Dispositif selon la revendication 8, caractérisé en ce que le dispositif de pression est constitué de rouleaux presseurs (12) agissant respectivement sur les bords (6) du produit (4).
  11. Dispositif selon la revendication 8, caractérisé en ce que le dispositif de pression est une bande de pression sans fin (13) agissant sur la totalité de la largeur du produit coulé (4).
  12. Dispositif selon la revendication 8, 9, 10 ou 11, caractérisé en ce que le refroidissement est configuré de telle sorte qu'il agit uniquement dans une zone déterminée qui s'étend sur toute la largeur de la pré-bande (5) et qui s'étend, en présence de rouleaux lisses ou d'entraînement (14), jusqu'à ceux-ci.
  13. Dispositif selon la revendication 12, caractérisé en ce que le dispositif de refroidissement (17) se présente sous la forme d'un refroidissement ouvert à pulvérisation (17) et/ou d'un refroidissement fermé par une bande sans fin de refroidissement (19, 19') sous la pré-bande (5).
EP08785302.4A 2007-08-04 2008-08-01 Procédé et dispositif d'uniformisation du transfert thermique d'un produit coulé pendant sa solidification sur la bande transporteuse métallique d'une installation de coulée horizontale sur bande Active EP2176016B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102007036969 2007-08-04
DE102007054554 2007-11-15
DE102007057278A DE102007057278A1 (de) 2007-08-04 2007-11-28 Verfahren und Vorrichtung zur Vergleichmäßigung des Wärmeübergangs eines Gussprodukts während seiner Erstattung auf dem Metalltransportband einer horizontalen Bandgießanlage
PCT/EP2008/006362 WO2009018973A1 (fr) 2007-08-04 2008-08-01 Procédé et dispositif d'uniformisation du transfert thermique d'un produit coulé pendant sa solidification sur la bande transporteuse métallique d'une installation de coulée horizontale sur bande

Publications (2)

Publication Number Publication Date
EP2176016A1 EP2176016A1 (fr) 2010-04-21
EP2176016B1 true EP2176016B1 (fr) 2017-05-10

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ID=40176023

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EP08785302.4A Active EP2176016B1 (fr) 2007-08-04 2008-08-01 Procédé et dispositif d'uniformisation du transfert thermique d'un produit coulé pendant sa solidification sur la bande transporteuse métallique d'une installation de coulée horizontale sur bande

Country Status (8)

Country Link
US (2) US8272426B2 (fr)
EP (1) EP2176016B1 (fr)
JP (1) JP5289436B2 (fr)
KR (1) KR101185393B1 (fr)
CN (1) CN101772388B (fr)
CA (1) CA2693895C (fr)
DE (1) DE102007057278A1 (fr)
WO (1) WO2009018973A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009030793A1 (de) * 2009-06-27 2010-12-30 Sms Siemag Ag Vorrichtung und Verfahren zum horizontalen Gießen eines Metallbandes
DE102012013425A1 (de) * 2012-07-03 2014-01-09 Salzgitter Flachstahl Gmbh Kontinuierlich arbeitende Bandgieß- und Walzanlage
DE102013214940A1 (de) * 2013-07-30 2015-02-05 Sms Siemag Ag Gießwalzanlage und Verfahren zum Herstellen von Brammen
CN113104626B (zh) * 2021-05-12 2021-12-17 株洲宜安新材料研发有限公司 一种用于非晶合金薄带材的收卷设备

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JPH05277668A (ja) 1992-03-27 1993-10-26 Nippon Steel Corp 単ベルト式連続鋳造装置
JPH067900A (ja) * 1992-06-26 1994-01-18 Nippon Steel Corp スラブの連続鋳造機および連続鋳造方法
JPH06210410A (ja) * 1993-01-11 1994-08-02 Nippon Steel Corp 単ベルト式連続鋳造装置
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Also Published As

Publication number Publication date
US20110253339A1 (en) 2011-10-20
JP2010533590A (ja) 2010-10-28
US8261812B2 (en) 2012-09-11
CN101772388B (zh) 2015-04-29
CN101772388A (zh) 2010-07-07
CA2693895C (fr) 2011-10-11
DE102007057278A1 (de) 2009-02-05
CA2693895A1 (fr) 2009-02-12
WO2009018973A1 (fr) 2009-02-12
JP5289436B2 (ja) 2013-09-11
KR101185393B1 (ko) 2012-09-25
EP2176016A1 (fr) 2010-04-21
KR20100017953A (ko) 2010-02-16
US8272426B2 (en) 2012-09-25
US20100132911A1 (en) 2010-06-03

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