EP2176016A1 - 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

Info

Publication number
EP2176016A1
EP2176016A1 EP08785302A EP08785302A EP2176016A1 EP 2176016 A1 EP2176016 A1 EP 2176016A1 EP 08785302 A EP08785302 A EP 08785302A EP 08785302 A EP08785302 A EP 08785302A EP 2176016 A1 EP2176016 A1 EP 2176016A1
Authority
EP
European Patent Office
Prior art keywords
conveyor belt
strip
cast product
metal conveyor
metal
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.)
Granted
Application number
EP08785302A
Other languages
German (de)
English (en)
Other versions
EP2176016B1 (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 Siemag AG
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 Siemag AG filed Critical SMS Siemag AG
Publication of EP2176016A1 publication Critical patent/EP2176016A1/fr
Application granted granted Critical
Publication of EP2176016B1 publication Critical patent/EP2176016B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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-casting of rectangular metal strands and subsequent further processing into metal strips by the DSC process (direct strip casting) in a horizontal strip casting plant, wherein the molten metal by means of a melt delivery system on at Bottom cooled horizontal metal conveyor belt is cast and solidifies the liquid cast product on this metal conveyor belt during its transport to the pre-band, which is then conveyed to the 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 flow stress, they degrade in the further course of solidification by elongation (flow), whereby 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 is also compensated for.
  • 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
  • the degree of freedom of this warping in the longitudinal direction due to the weight of the horizontally transported on the subsequent roller conveyor belt and / or by one or more following the metal conveyor belt following drive or smoothing rollers is limited to the first and then the entire band Clamp the belt mechanically and force it flow-downwards to the plane-parallel run.
  • This restriction of the degree of freedom then leads to the fact that the stresses present in the band must be dissipated in non-clamped areas, which is why the band narrow sides first bulge up after leaving the metal conveyor belt.
  • WO 2006/066552 A1 To counter this problem and to avoid the effect of the profiling of the pre-strip in the casting area and the threading in the To ensure downstream units is proposed in WO 2006/066552 A1, to arrange a guide element at the end of the primary cooling zone and before the start of the usual secondary cooling zone.
  • 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 method known from WO 2006/066552 A1 is that a thorough influencing of the thermal processes on the metal conveyor belt is only incompletely possible due to the guide element following the metal conveyor belt.
  • the stated object is procedurally achieved with the features of claim 1, characterized in that to avoid a possible up to the pouring of the casting rear buckling of the strip edges and to equalize the heat transfer to the cast product during its He-stiffening on the metal conveyor belt following steps are combined : Production of a maximum contact of the cast product on the metal conveyor belt, one of which is above the cast product in the area of the casting Cooled pressure device arranged from the top onto the cast product solidifying toward the pre-band, preferably on the band edges thereof, compensating the abruptly reduced cooling of the underside of the pre-band when leaving the metal conveyor belt, for this purpose in a defined area immediately behind the metal conveyor belt the underside of the Vorbandes and optionally simultaneously the top, optionally over the entire width, additionally cooled.
  • the required pressure is applied by a pressure roller acting on the entire width of the cast product or by partial pressure rollers acting only on the strip edges.
  • 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. 2a shows an enlarged partial section of FIG. 1 with open injection cooling
  • FIG. 2b shows an enlarged partial section of FIG. 1 with circulating cooling belts
  • FIG. 3a is a plan view of a partial detail of FIG. 1 according to the prior art
  • FIG. 4a is a plan view of Fig. 3 with a pressure roller
  • FIG. 5 shows the plan view of FIG. 3 with partial pressure rollers
  • Fig. 6 is a plan view of Fig. 3 with a printing tape.
  • FIG. 1 shows a side view of a strip caster 1 according to the DSC method with its essential components.
  • this plant 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 from the ladle 2 'through the distributor channel 3 downflowing molten metal is applied by the melt delivery system 3 'in a certain thickness on the cooled metal conveyor belt 7 as a cast product 4.
  • 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, for example, only a thickness of about 1 mm, 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.
  • On the metal conveyor belt 7 close for transport and for safe management of fully solidified Vorbandes 5 smooth / drive rollers 14, which mechanically clamp the Vorband and promote to a driver 16, from where it is then fed to its further processing.
  • 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.
  • a maximum contact of at least the strip edges of the cast product 4 with the metal conveyor belt 7 can be forced by a correspondingly exerted pressure on the cast product 4.
  • FIG. 2a an enlarged partial section of Fig. 1, in addition to the pressure roller 11, which acts from above 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 drawn. 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, from the end of the metal conveyor belt 7 to the first of the lower smooth / drive rollers 14 enough.
  • FIG. 2b An alternative cooling of the pre-strip 5 in the form of a closed cooling is shown in FIG. 2b.
  • 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 '. 2a, only the underside of the pre-strip 5 can be cooled by a cooling belt 19 arranged there and / or optionally also the upper side of the pre-belt by a further cooling belt 19 'arranged on the upper side of the pre-belt 5.
  • the strip casting machine 1 of FIGS. 1 and 2 is shown in a perspective plan view in FIGS. 3 to 6.
  • FIG. 3 a shows by way of example a part of the strip casting installation 1 from the distribution channel 3 / melt delivery system 3 'to the end of the metal transport strip 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 and
  • the line "C” represents a cross section through the solidified Preband 5, which rests on a roller table T after leaving the metal conveyor belt 7.
  • FIG. 3b the high arching of the band described in FIG. 3a is more clearly represented by the band cross sections resulting in the respective cross-sectional lines.
  • the cross-sectional line "A” the cast product 4, which is not completely solidified, still rests on its underlay, the metal conveyor belt 7, due to its weight and its existing plastic properties with complete contact of the now no longer plastic cast product 4 detached from the metal conveyor belt 7, the cast product 4 now has a slightly curved cross-section.
  • the cross-section line "C” the warping of the strip edges 6 has progressed further and the cross-section of the fully solidified pre-strip 5 resting on a roller conveyor 7 'extending the metal conveyor belt 7 has approximately the shape of a rain gutter.
  • FIG. 4a shows the change in the warping of the band edges 6 which occurs as a result of the use of a pressure roller 11 arranged in the region of the cross-section line "B."
  • the bulge region 18 of the band edges 6 only begins with a significantly reduced absolute value starting from the cross-section line "B".
  • the pressure roller 11 thus also acts backwards with respect to the cross-section line "A” with an effect suppressing the bulging of the band edges 6.
  • the further upward bending of the band edges 6 to the cross-sectional line "C" can indeed be achieved by the pressure roller 11 is not completely suppress, but is significantly lower than in Fig. 3a without pressure roller 11.
  • partial pressure rollers 12 are used as a printing device as an alternative to the pressure roller 11 in the same area at the end of the metal conveyor belt, which act exclusively on the belt edges 6.
  • the effect achieved by this measure is quite comparable to the mode of action of a pressure roller 11, as becomes clear from the indicated bulge area 18.
  • a further alternative to the pressure rollers 11 or partial pressure rollers 12 is the use of a pressure belt 13, which acts according to the figure 6 on a larger area of the cast product 4 with pressure.
  • the bulge area 18 resulting here is therefore somewhat smaller than in the previously described pressure rollers 11, 12.

Landscapes

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

Abstract

Dans la coulée de barreaux rectangulaires de métal à des dimensions proches des dimensions finales et ensuite la poursuite du traitement en feuillards métalliques par le procédé DSC ('Direct strip casting' - coulée directe de feuillards) dans une installation de coulée horizontale de feuillards, pendant sa solidification en un pré-feuillard (5), le produit coulé (4) se déforme par évacuation non uniforme de chaleur parce que le côté supérieur du feuillard n'est refroidi que par convection avec l'air ambiant et par rayonnement thermique tandis que son côté inférieur est en contact direct avec une bande transporteuse métallique (7) refroidie. De ce fait, le contact d'abord complet entre le produit coulé (4) et la bande transporteuse métallique (7) est perdu et les bords du feuillard du produit coulé se bombent vers le haut. Pour garantir de manière simple un contact maximum du produit coulé (4) placé sur la bande de transport métallique (7) et donc une optimisation et une uniformisation du transfert thermique du produit coulé (4) vers la bande transporteuse métallique (7) sur toute la largeur de coulée, l'invention propose de repousser depuis le haut au moyen d'un dispositif de poussée (11) disposé à l'extrémité de la bande transporteuse métallique (7) le produit de coulée (4) qui se solidifie pour former le pré-feuillard (5), de préférence sur ses bords (6), et pour compenser la diminution brusque du refroidissement du côté inférieur du pré-feuillard lorsqu'il quitte la bande transporteuse métallique (7), de refroidir en supplément ce dernier dans une plage définie, immédiatement en aval de la bande transporteuse métallique (7).
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 true EP2176016A1 (fr) 2010-04-21
EP2176016B1 EP2176016B1 (fr) 2017-05-10

Family

ID=40176023

Family Applications (1)

Application Number Title Priority Date Filing Date
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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JPS53144833A (en) * 1977-05-24 1978-12-16 Furukawa Electric Co Ltd Continuous casting rolling method
JPS6035218B2 (ja) 1978-04-21 1985-08-13 古河電気工業株式会社 連続鋳造法
US4506725A (en) * 1982-11-05 1985-03-26 Electric Power Research Institute Method and apparatus for magnetically holding a cast metal ribbon against a belt
DE3342941C1 (de) * 1983-11-26 1984-12-06 Fried. Krupp Gmbh, 4300 Essen Pruefeinrichtung zur Feststellung von Beschaedigungen an den Giessbaendern einer Stranggiesskokille
JPS60250857A (ja) * 1984-05-28 1985-12-11 Nippon Kokan Kk <Nkk> 弱脱酸鋼の水平連続鋳造法
DE3423834A1 (de) * 1984-06-28 1986-01-09 Mannesmann AG, 4000 Düsseldorf Verfahren und vorrichtung zum kontinuierlichen giessen von metallschmelze, insbesondere von stahlschmelze
KR940008621B1 (ko) * 1985-06-27 1994-09-24 가와사키세이데쓰 가부시키가이샤 엔드레스 스트립의 주조방법 및 그 장치
JPS63252604A (ja) * 1987-04-08 1988-10-19 Hitachi Ltd 連鋳直結圧延方法及び装置
US5301741A (en) * 1991-06-03 1994-04-12 Olin Corporation Casting of metal strip
JPH05277668A (ja) 1992-03-27 1993-10-26 Nippon Steel Corp 単ベルト式連続鋳造装置
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JPH06210410A (ja) * 1993-01-11 1994-08-02 Nippon Steel Corp 単ベルト式連続鋳造装置
US5392843A (en) * 1993-03-25 1995-02-28 Dolan; James J. Continuous silver float casting of steel sheet or plate
JP3925789B2 (ja) * 2002-05-17 2007-06-06 Ｊｆｅスチール株式会社 高温鋼板の冷却方法、高温鋼板の冷却装置、及び鋼板の製造方法
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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
EP2176016B1 (fr) 2017-05-10
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
KR20100017953A (ko) 2010-02-16
US8272426B2 (en) 2012-09-25
US20100132911A1 (en) 2010-06-03

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