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EP0814925B1 - Procede et installation de production continue de toles en forme de feuillards - Google Patents

Procede et installation de production continue de toles en forme de feuillards Download PDF

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Publication number
EP0814925B1
EP0814925B1 EP96902223A EP96902223A EP0814925B1 EP 0814925 B1 EP0814925 B1 EP 0814925B1 EP 96902223 A EP96902223 A EP 96902223A EP 96902223 A EP96902223 A EP 96902223A EP 0814925 B1 EP0814925 B1 EP 0814925B1
Authority
EP
European Patent Office
Prior art keywords
melt
starting strip
appliance
temperature
molten bath
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
EP96902223A
Other languages
German (de)
English (en)
Other versions
EP0814925A1 (fr
Inventor
Fritz-Peter Pleschiutschnigg
Ingo Von Hagen
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.)
Vodafone GmbH
Original Assignee
Mannesmann 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 Mannesmann AG filed Critical Mannesmann AG
Publication of EP0814925A1 publication Critical patent/EP0814925A1/fr
Application granted granted Critical
Publication of EP0814925B1 publication Critical patent/EP0814925B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • B22D11/008—Continuous casting of metals, i.e. casting in indefinite lengths of clad ingots, i.e. the molten metal being cast against a continuous strip forming part of the cast product
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/003—Apparatus
    • C23C2/0035—Means for continuously moving substrate through, into or out of the bath
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/003—Apparatus
    • C23C2/0036—Crucibles
    • C23C2/00361—Crucibles characterised by structures including means for immersing or extracting the substrate through confining wall area
    • C23C2/00362—Details related to seals, e.g. magnetic means

Definitions

  • the invention relates to a method for the continuous production of band-shaped Sheets, in particular made of steel, with the features of the generic term of Claim 1 and an apparatus for performing this method.
  • EP 0 311 602 B1 describes a method for producing thin metal strands e.g. known from steel with thicknesses below 20 mm. This procedure uses a Metallic steel strip on the surface with room temperature (Mother band) in the vertical direction from bottom to top or vice versa by a Melted metal.
  • the molten metal can be of the same type or also different material to the mother tape.
  • the dwell time of the Mother tape in the molten metal is like this depending on its temperature dimensioned that a crystallization of metal crystals and an attachment of Melting takes place on the surface of the mother tape without the mother tape melts itself or the already deposited material again is melted.
  • a band-shaped semi-finished product can be produced its thickness is about 6 to 10 times the original thickness of the mother tape corresponds. Because the solidification process is different from the usual continuous casting This does not run from the outside inwards, but in the opposite direction Form of semi-finished product also known as inversion casting.
  • preheating to the desired temperature of the Realize the mother tape before entering the melt in that the A suitable preheating furnace in the form of a continuous furnace as the melt container separate unit is connected upstream.
  • a suitable preheating furnace in the form of a continuous furnace as the melt container separate unit is connected upstream.
  • Such a furnace could use fossil fuels Energy sources (e.g. gas or oil) or with electrical energy (e.g. Induction furnace) are heated.
  • the use of a plasma torch would also be imaginable.
  • the object of the invention is to provide a method and an apparatus for the same Specify implementation with which a specific preheating of the mother band a preheating temperature well above room temperature (especially above 200 ° C) is possible without this requiring a large outlay on equipment and without the risk of reoxidation of the surface of the mother tape.
  • the method according to the invention provides that the mother tape used in each case after creating a clean metallic surface before introducing it Melt bath heated to a temperature well above room temperature becomes.
  • This preheating should be at least 200 ° C, preferably at least 300 and particularly preferably be at least 400 ° C. If necessary, the Preheating are also significantly higher.
  • the warming is caused by indirect Heat exchange carried out, taking advantage of the heat of the Crystallize metal melt used. For this purpose, however, none direct contact of the melt with the mother tape instead. So reoxidation the mother tape surface is avoided, at least in the area of Heating zone an oxygen-free atmosphere. This can, for example, by the Generation of an appropriate vacuum can be maintained. In most In some cases, however, the use of a protective gas atmosphere should be more advantageous.
  • Inert gas in particular argon and possibly nitrogen, are suitable.
  • the preheated mother tape is then in a known manner by the Metal melt performed so that crystallization and entrainment of liquid Melt take place on the surface of the mother tape.
  • the Melt temperature can be the thickness of the coating desired Mother tape can be set.
  • After leaving the weld pool expediently an immediate smoothing of the crystallized coating. Because of that Melting pool the amount of heat required for preheating the mother tape is withdrawn, this must be done when setting the temperature of the weld pool freshly supplied melt are taken into account.
  • the melt temperature must therefore set higher than if the preheating in one separate upstream heating unit (e.g. continuous furnace).
  • the method is used with particular advantage for the coating of Mother tape made of common carbon steel.
  • the material of the molten metal can be made from of the same material. However, the use is particularly expedient a molten metal made of a different material than that of the mother tape. In particular, the use of higher-alloy materials is recommended for this.
  • the thickness of the mother tape used should be less than 3 mm if possible, preferably less than 2 mm and particularly preferably less than 1 mm. The thinner that material is used, the faster the heating can take place.
  • the means that the preheating section can be kept correspondingly shorter or that a higher preheating temperature can be achieved over the same length.
  • a procedure is preferred in which the mother tape is passed through the molten bath from bottom to top.
  • the mother tape If the mother tape is passed from bottom to top through the melt, it must be ensured at the point at which the mother tape enters the melt that no liquid melt escapes to the outside.
  • the passage point has the shape of a narrow gap, which is largely filled by the cross section of the mother tape.
  • the temperature of the freshly supplied melt in such a way that, taking into account the heat emission due to the preheating of the mother tape, the melt pool has an isotherm in the vicinity of the point where the mother tape enters the melt , which lies between the liquidus temperature T liq and the solidus temperature T sol . Under these conditions, the seal can be easily implemented.
  • the system consists of a melt container 9, the bottom of one Sealing device 10 is formed.
  • the melt container 9th also be equipped with its own floor in which the sealing device 10 is installed.
  • the sealing device 10 consists essentially of a flat Housing with an approximately cuboid interior according to the cross-sectional geometry of the mother tape to be coated 1.
  • the broad side walls of the Sealing device 10 are designated by reference number 11.
  • the interior of the Sealing device 10 is open from below and upwards, so that it is narrow Feedthrough channel for the mother tape 1 represents.
  • At least the broad side walls 11 are resistant to a metal melt 14 to be used Refractory material formed.
  • This refractory material should expediently be so be selected that it has the highest possible thermal conductivity, since the Broad side walls 11 in the sense of a heat exchanger as radiant heating surfaces should serve. In principle, it would be possible to use the broad side walls 11 To extend the entire width of the melt container 9, so that in extreme cases narrow side surfaces, along which the longitudinal edges of the mother tape 1 pass, omitted.
  • a shielding box 6 is flanged tightly below the sealing device. This shielding box 6 has a gas connector 8 through which a Inert gas at overpressure (arrow 7) into the inside of the shielding box 6 can be initiated.
  • the molten metal 14 is over several Melt inlet connector 13, which is located near the lower part of the Sealing device 10 are located and with their outlet opening on the broad side walls 11th are directed into the melt container 9. This is through appropriate Arrows indicated. Heat through direct contact with the molten metal 14 the broad side walls 11 to a correspondingly high temperature. The means that thus the lead-through channel 12 to a heating channel for the mother tape 1 to be introduced. Due to the intense heat radiation of the Broad side walls 11 finds an extremely rapid heating of the Mother tape 1 instead. This effect can be seen from the graphical representation of the Figure 2 can be easily estimated.
  • Figure 2 shows the cooling rate of strip or plate-shaped semi-finished products made of steel by heat radiation depending on the surface temperature and the thickness of the objects.
  • This graphic can also be reversed apply for a statement about the heating rate, if appropriate molded objects from room temperature by using a heat radiation source is heated to a surface temperature, as indicated in the illustration. From this it can be seen that a 1 mm thick steel band with a Radiation temperature of e.g. 1426 ° C at a speed of approx. 250 ° C / sec is heated.
  • the channel length a can thus be set Influence preheating temperature. With a reduction in the thickness of the mother tape a higher temperature would occur with the same channel length a.
  • the crystallization of melt begins, which grows to form the coating provided with the reference number 16.
  • a pair of smoothing rollers 15 is expediently used immediately above the weld pool.
  • the coated tape with a smoothed surface is designated 17.
  • the thickness of the coating 16 that can be achieved essentially depends on the length of contact time between the mother tape 1 and the molten metal 14. The contact time in turn depends on the feed rate and the length of the immersion distance b of the mother tape 1.
  • the meniscus already mentioned above, which forms in the entrance area of the mother tape 1 into the molten metal 14, is designated by 18.
  • T liq The isotherm with the liquidus temperature is identified as T liq .
  • the invention makes it possible to apply thin coatings to a mother tape with a secure weld to the base material without space-consuming separate heating units must be used for this.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Coating With Molten Metal (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Powder Metallurgy (AREA)
  • Continuous Casting (AREA)
  • Manufacturing Of Electric Cables (AREA)
  • Sewing Machines And Sewing (AREA)

Claims (18)

  1. Procédé pour fabriquer de façon continue des tôles sous forme de bande, en particulier en acier, dans lequel une bande mère (1), ayant une surface métalliquement pure, est guidée à travers un bain de matière en fusion d'un métal (longueur de plongée b), la vitesse de la bande mère (1) étant de plus réglée de façon dépendant de la longueur de plongée b et de la température de la matière en fusion métallique (14) pour atteindre une épaisseur totale souhaitée d'un revêtement se déposant sous forme de cristaux et de matière en fusion sur la surface de la bande mère (1), et le revêtement étant lissé directement après avoir quitté le bain de matière en fusion par laminage,
    caractérisé en ce que la bande mère (1), préchauffée à une température supérieure à 200°C, est introduite dans le bain de matière en fusion, le préchauffage étant effectué par échange thermique indirect avec le bain de matière en fusion (14) dans un environnement sans oxygène, et en ce qu'une matière en fusion métallique fraíchement amenée au bain de matière en fusion présente une température augmentée de façon correspondant aux pertes thermiques pour le préchauffage.
  2. Procédé selon la revendication 1,
    caractérisé en ce que la bande mère est guidée à travers le bain de matière en fusion de bas en haut.
  3. Procédé selon une des revendications 1 ou 2,
    caractérisé en ce que l'environnement sans oxygène est formé par une atmosphère, maintenue à une légère surpression, d'un gaz inerte, en particulier de l'argon ou de l'azote.
  4. Procédé selon une des revendications 1 à 3,
    caractérisé en ce que le préchauffage est effectué jusqu'à au moins 300°C, en particulier au moins 400°C.
  5. Procédé selon une des revendications 1 à 4,
    caractérisé en ce que, pour la bande mère, il est utilisé une matière constituée d'un acier au carbone usuel.
  6. Procédé selon une des revendications 1 à 5,
    caractérisé en ce que, comme bain de matière en fusion, il est utilisé la matière en fusion métallique d'une matière du même type que la bande mère.
  7. Procédé selon une des revendications 1 à 5,
    caractérisé en ce que, comme bain de matière en fusion, il est utilisé la matière en fusion métallique d'une matière à base d'acier plus fortement alliée par rapport à la matière de la bande mère.
  8. Procédé selon une des revendications 1 à 7,
    caractérisé en ce qu'une bande mère ayant une épaisseur inférieure à 3 mm, avantageusement inférieure à 2 mm, et plus préférablement inférieure à 1 mm, est utilisée.
  9. Procédé selon une des revendications 1 à 8,
    caractérisé en ce que la température de la matière en fusion fraíchement amenée est réglée de façon que, en tenant compte de la perte de chaleur pour préchauffer la bande mère, le bain de matière en fusion dans la zone proche du point d'entrée de la bande mère dans la matière en fusion métallique (zone du 〈〈 ménisque 〉〉, présente un isotherme qui se trouve entre la température du liquidus Tliq et la température du solidus Tsol.
  10. Installation pour la mise en oeuvre du procédé selon la revendication 1, comportant un récipient de matière en fusion (9), ayant un dispositif d'étanchéité (10) dans la zone de la paroi externe du récipient de matière en fusion (9), à travers lequel la bande mère (1) peut être introduite dans la matière en fusion métallique (14) ou retirée de celle-ci, un dispositif d'avance (rouleaux d'entraínement 2, 5) pour la bande mère (1), et un dispositif de laminage (paire de rouleaux de lissage 15) pour lisser le revêtement cristallisé,
    caractérisée en ce que le dispositif d'étanchéité (10) est réalisé sous forme d'un boítier généralement quadratique, plat, plongeant profondément dans la matière en fusion métallique (14) dans la direction de transport de la bande mère (1), dont les parois latérales larges (11) s'étendant parallèlement au plan de la bande mère (1) sont constituées d'une matière réfractaire et entourent à faible distance la bande mère (1), comme surfaces à rayonnement, en formant un canal de passage plat (12), et en ce qu'un dispositif pour maintenir une atmosphère sans oxygène est raccordé au dispositif d'étanchéité (10) dans la zone du canal de passage (12).
  11. Installation selon la revendication 10,
    caractérisée en ce que le dispositif d'étanchéité (10) est agencé dans la zone de fond du récipient de matière en fusion (9) et la direction de transport du dispositif de transport (paire de rouleaux d'entraínement 2, 5) est orientée verticalement vers le haut.
  12. Installation selon la revendication 10 ou 11,
    caractérisée en ce que le dispositif d'étanchéité (10) est formé en une matière réfractaire ayant un coefficient de conductibilité thermique comparativement élevé.
  13. Installation selon la revendication 12,
    caractérisée en ce que l'amenée pour la matière en fusion métallique (14) dans la zone voisine du fond du récipient de matière en fusion (9) est réalisée en particulier sous forme de plusieurs raccords (13) d'entrée de matière en fusion dont la direction de sortie est orientée vers la partie inférieure des parois latérales larges (11).
  14. Installation selon une des revendications 10 à 13,
    caractérisée en ce que le dispositif pour maintenir une atmosphère sans oxygène est réalisé sous forme de protection de gaz inerte.
  15. Installation selon la revendication 14,
    caractérisée en ce que la protection de gaz inerte présente une boíte de protection (6) entourant la zone d'entrée pour la bande mère (1) au niveau du canal de passage (12), à laquelle du gaz inerte se trouvant sous une légère surpression peut être amené à travers un raccord de gaz (8) et dans laquelle la bande mère (1) peut être introduite par une ouverture en forme de fente.
  16. Installation selon la revendication 15,
    caractérisée en ce que l'ouverture en forme de fente de la boíte de protection (6) est étanchéifiée vers l'extérieur par un joint étanche à lamelles (4) ou une paire de rouleaux élastiques (rouleaux d'étanchéité 3), en particulier une paire de rouleaux en caoutchouc dur.
  17. Installation selon une des revendications 10 à 16,
    caractérisée en ce que le dispositif d'étanchéité (10) pénètre d'au moins 0,5 m, en particulier d'au moins 1 m, dans la matière en fusion métallique (14) (longueur a).
  18. Installation selon une des revendications 10 à 17,
    caractérisée en ce que la largeur intérieure dans la zone de sortie de la bande mère (1) du canal de passage (12), pour éviter une sortie de la matière en fusion, est plus étroite que dans la zone restante sur la longueur a du canal de passage (12).
EP96902223A 1995-03-07 1996-02-05 Procede et installation de production continue de toles en forme de feuillards Expired - Lifetime EP0814925B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19509681 1995-03-07
DE19509681A DE19509681C1 (de) 1995-03-07 1995-03-07 Verfahren und Anlage zur kontinuierlichen Erzeugung bandförmiger Bleche
PCT/DE1996/000210 WO1996027464A1 (fr) 1995-03-07 1996-02-05 Procede et installation de production continue de toles en forme de feuillards

Publications (2)

Publication Number Publication Date
EP0814925A1 EP0814925A1 (fr) 1998-01-07
EP0814925B1 true EP0814925B1 (fr) 1999-05-19

Family

ID=7756936

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96902223A Expired - Lifetime EP0814925B1 (fr) 1995-03-07 1996-02-05 Procede et installation de production continue de toles en forme de feuillards

Country Status (9)

Country Link
US (1) US5855238A (fr)
EP (1) EP0814925B1 (fr)
JP (1) JP2914585B2 (fr)
KR (1) KR100264945B1 (fr)
AT (1) ATE180189T1 (fr)
DE (2) DE19509681C1 (fr)
RU (1) RU2146984C1 (fr)
WO (1) WO1996027464A1 (fr)
ZA (1) ZA961531B (fr)

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DE19545259A1 (de) * 1995-11-24 1997-05-28 Mannesmann Ag Verfahren und Vorrichtung zum Erzeugen von dünnen Metallsträngen
DE19638906C1 (de) * 1996-09-23 1998-01-02 Schloemann Siemag Ag Verfahren und Vorrichtung zur Erzeugung von beschichteten Strängen aus Metall, insbesondere von Bändern aus Stahl
DE19638905C1 (de) * 1996-09-23 1998-01-02 Schloemann Siemag Ag Verfahren zur Erzeugung von beschichteten Metallsträngen, insbesondere Metallbändern und Beschichtungsanlage
DE19731124C1 (de) * 1997-07-19 1999-01-21 Schloemann Siemag Ag Verfahren und Vorrichtung zur Erzeugung von beschichtetem Warm- und Kaltband
DE19813528A1 (de) * 1998-03-26 1999-10-07 Siemens Sa Vorrichtung zur Behandlung von plattenförmigen Werkstücken, insbesondere Leiterplatten
DE19902066A1 (de) * 1999-01-20 2000-08-03 Sms Demag Ag Verfahren und Vorrichtung zur Erzeugung von beschichteten Strängen aus Metall, insbesondere von Bändern aus Stahl
FI116453B (fi) * 2000-12-20 2005-11-30 Outokumpu Oy Menetelmä kerrosmetallituoteaihion valmistamiseksi ja kerrosmetallituoteaihio
NZ549911A (en) * 2006-10-19 2009-04-30 Syft Technologies Ltd Improvements in or relating to SIFT-MS instruments
JP5833232B2 (ja) * 2011-05-27 2015-12-16 エイケイ・スチール・プロパティーズ・インコーポレイテッドＡＫ Ｓｔｅｅｌ Ｐｒｏｐｅｒｔｉｅｓ， Ｉｎｃ． メニスカスコーティング器具および方法
CN103252369B (zh) * 2012-02-20 2017-05-10 秋海滨 固‑液相金属铸轧复合方法及设备

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Also Published As

Publication number Publication date
KR100264945B1 (ko) 2000-09-01
JP2914585B2 (ja) 1999-07-05
ATE180189T1 (de) 1999-06-15
EP0814925A1 (fr) 1998-01-07
WO1996027464A1 (fr) 1996-09-12
RU2146984C1 (ru) 2000-03-27
JPH10511313A (ja) 1998-11-04
DE59601950D1 (de) 1999-06-24
ZA961531B (en) 1996-08-28
DE19509681C1 (de) 1996-05-02
KR19980702596A (ko) 1998-08-05
US5855238A (en) 1999-01-05

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