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EP1144705B1 - Procede et dispositif pour produire des bandes de metal, notamment des feuillards d'acier, munies d'un revetement - Google Patents

Procede et dispositif pour produire des bandes de metal, notamment des feuillards d'acier, munies d'un revetement Download PDF

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Publication number
EP1144705B1
EP1144705B1 EP00901068A EP00901068A EP1144705B1 EP 1144705 B1 EP1144705 B1 EP 1144705B1 EP 00901068 A EP00901068 A EP 00901068A EP 00901068 A EP00901068 A EP 00901068A EP 1144705 B1 EP1144705 B1 EP 1144705B1
Authority
EP
European Patent Office
Prior art keywords
thickness
metal strand
strand
stripping
melt
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
EP00901068A
Other languages
German (de)
English (en)
Other versions
EP1144705A2 (fr
EP1144705A3 (fr
Inventor
Fritz-Peter Pleschiutschnigg
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 Schloemann Siemag AG
Schloemann 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 Schloemann Siemag AG, Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Publication of EP1144705A2 publication Critical patent/EP1144705A2/fr
Application granted granted Critical
Publication of EP1144705B1 publication Critical patent/EP1144705B1/fr
Publication of EP1144705A3 publication Critical patent/EP1144705A3/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
    • 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
    • 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
    • C23C2/50—Controlling or regulating the coating processes

Definitions

  • the invention relates to a method and an apparatus for generating coated strands of metal, especially steel strips, in which a Metal strand through the bottom of a vessel filled with melt of the same or different composition as the metal strand is performed, the Dwell time of the metal strand depending on the melt pool height, the Casting speed, the metal strand thickness and the preheating temperature of the metal strand is chosen so that the deposited melt on the metal strand desired thickness of several times the initial thickness of the metal strand assumes and the metal strand with crystallized layer after emerging from the Melting bath experiences a smoothing stitch, which is carried out when the Surface temperature of the crystallized strand is lower than the solidus temperature of the melt pool and thus at least the surface of the crystallized Layer has solidified
  • the belt then experiences when it passes through the pair of smoothing rollers a strong hypothermia, with which the tendency to crack both longitudinally and occurs across the tape direction. This risk increases with higher casting and Rolling speeds.
  • the smoothing stitch is therefore carried out there if the surface temperature of the crystallized strand is lower than the solidus temperature of the melt pool and thus at least the surface of the crystallized layer has solidified. Nevertheless, it cannot be ruled out that the Thickness of the crystallized layer fluctuates.
  • the invention is therefore based on the object of a method and a device to create a smoothing of the tape with a tape thickness tolerance of maximum 2% without cracking in both the surface and inside of the belt Ensure simultaneous thickness control of the crystallization.
  • the main features for creating flawless, flat-coated tapes for example with a width / thickness ratio greater than 60 and a total thickness of a maximum of 12 mm, preferably 2 to 6 mm, of one material or of Composites of different metal grades such as carbon steel as a mono material or carbon steel with a stainless steel coating of at least 5% of the total strip thickness as a composite material and a thickness deviation of maximum 2% between the edge (40 mm from the edge) and the middle of the tape, are of the same thickness with respect to the desired goal of the crystallized Layer in particular characterized in that between the weld pool and a stripping of the crystallization at the beginning of the solidification on the strip surface with a desired thickness to a smaller thickness. In the end it will only stripped or carried as much material as is necessary to make the same To achieve the thickness of the crystallized layer over the length of the strand. It will thus the excess of the crystallized layer stripped.
  • Figures 1 and 2 give the overall view of the method and the device for smoothing coated strands, preferably strips of steel 1 using a Smoothing roller pair 2 again.
  • the mother tape 1.1 is filled in the crystallizer 3 Melt 3.3, which is introduced via a melt inlet 3.1, through the nozzles a bottom inlet device 3.2 with a casting and rolling speed 7.1 of 0.05 to 10 m / s by means of a pair of drive rollers 1.5 below the crystal illuminator promoted.
  • the mother tape 1.1 with a temperature of either 20 to 80 ° C before entering the crystallizer 3 begins at the nozzle outlet 3.2 above the steel meniscus 3.5 the crystallization 3.6 of the melt in point 3.6.1 and removes the melt 3.3 Overheating and crystallization energy with simultaneous heating.
  • This Energy flow 4 from the melt into the mother tape takes place when passing through the Mother band through the melt pool 3.3 between the meniscus 3.5 and the Bath surface 3.4 over the melt pool height 3.3.1 instead.
  • the coated tape 1 At the exit 5 of the coated tape 1 from the bath surface 3.4 of the weld pool with a Surface roughness 1.3 it has a certain thickness 1.2, which in essentially from the strip temperature when entering the crystallizer, from the Melt temperature and the contact time of the strip with the melt determined with which the strip 1 enters the roll gap 2.1 of the pair of smoothing rollers 2.
  • the tape 1 coated in this way is at the outlet 5 from the bath 3.4 on the surface "doughy" (two phases: melt and crystal) and has a surface roughness 1.3 of greater than 2% that meet the flatness criteria of a tape with a Width / thickness ratio greater than 60 does not do it justice.
  • the crystallization 3.6 in the bath 3.3 has a temperature 8 on its surface 4.1 (T-x), which is greater than the solidus temperature and less than the liquidus temperature (T-li> T-x> T-sol) is and has a two-phase state consisting of melt and crystal, on.
  • T-x temperature 8 on its surface 4.1
  • T-li> T-x> T-sol liquidus temperature
  • T-sol liquidus temperature
  • the melt with the reversal of the energy flow 6 begins Solidification of the residual melt in the crystallized layer consisting of the Phases melt and crystal, from the surface of the tape 1 perpendicular in Towards the middle of the belt and in the surface itself towards the pair of smoothing rollers 2 parallel to the casting and rolling direction 7, i.e. the surface temperature of the belt decreases, starting from the bath surface 3.4 at point 5 in the direction of Smoothing roller pair 2, continuously, passes through the solidus temperature in point 9.3 Inlet 2.1.1 of the coated tape 1 in the pair of smoothing rollers 2, where they then Assumes a value below T-Solidus.
  • This stripping 20 or control of the coating thickness can alternatively both with a mechanical scraper 22 (knife) made of metal and / or ceramic exists and can also be cooled, as well as with a pneumatic scraper that is operated with an oxygen-free gas jet 23 exist.
  • both types of wipers 22 and 23 can be used sequentially reach.
  • both wipers are in their position, i.e. with their distance to Belt surface 1.3, to the bath surface 3.4 and to each other freely selectable.
  • FIG. 3 shows the area of the pair of smoothing rollers 2 in somewhat more detail Coated strip 1 with its crystallization 3.6 runs in the roll gap 2.1.1 a surface temperature, T-2.1.1 less than T-Solidus (T-2.1.1 ⁇ T-sol) and occurs with a controlled reduced temperature T-2.1.2 less than T-2.1.1 (T-2.1.2 ⁇ T-2.1.1 ⁇ T-sol) out of the roll gap 2.1 at its outlet 2.1.2.
  • the Temperature loss in the roll gap should be checked and kept small.
  • This can according to the invention by an appropriately controlled heat transfer Smoothing roller pair 2 with internal cooling 2.5 and heat-controlling layer 2.6 or Layers can be achieved.
  • rollers 2 you Layer structure 2.6 and the choice of different roller materials such as Steel, metals, metal ceramics and / or ceramics can be coordinated.
  • the entire space 11 above the bath surface 3.4 is in its temperature and Atmosphere (nitrogen and / or argon) controlled so that those described above Conditions are ensured and an oxidation of the bath surface is avoided.
  • the strip coated in this way is directly or indirectly a further rolling mill 12 and Rolling process for the production of finished hot strip and / or cold strip both as Mono material as well as composite material with or without pre-switched stain fed.
  • control and / or regulate the temperature field in the coated Band 1 and on the band surface 1.3 between the melt pool surface 3.4 and the exit of the coated and smoothed belt 1.4.1 from the pair of smoothing rollers 2 are measuring devices for temperature detection 2.8 on the inside of the heat-controlled wall elements 6.2 attached.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Continuous Casting (AREA)
  • Ropes Or Cables (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Wire Processing (AREA)
  • Coating With Molten Metal (AREA)
  • Metal Rolling (AREA)

Claims (7)

  1. Procédé pour la production de produits coulés de métal revêtus, en particulier de bandes (1) en acier, dans lequel un produit coulé en métal (1) est guidé à travers le fond d'un récipient (3) rempli d'une masse fondue (3.3) de même composition ou de composition différente de celle du produit coulé en métal (1.1), le temps de séjour du produit coulé en métal (1.1) étant choisi en fonction de la hauteur du bain de la masse fondue (3.3.1), de la vitesse de coulée, de l'épaisseur du produit coulé en métal et le la température de préchauffage du produit coulé en métal de telle manière que la masse fondue déposée sur le produit coulé en métal prend l'épaisseur voulue du multiple de l'épaisseur de départ du produit coulé en métal et le produit coulé en métal (1.) avec une couche en cours de cristallisation (3.6) subit après la sortie du bain de masse fondue (3.3) une passe de lissage (2) et en ce que la passe de lissage est réalisée lorsque la température de surface du produit coulé en cours de cristallisation (3.6) est inférieure à la température de solidus du bain de masse fondue (3.) et qu'au moins la surface (1.3) de la couche en cours de cristallisation (3.6) est solidifiée, caractérisé en ce qu'on effectue entre le bain de masse fondue (3.4) et le début de la solidification (9.3) à la surface de la bande (1.3) un raclage (20) du produit en cours de cristallisation (3.6) avec une épaisseur (1.2) à une épaisseur inférieure (21).
  2. Procédé selon la revendication 1, caractérisé en ce que le raclage (20) est réalisé mécaniquement (22), par exemple avec un couteau (22,1).
  3. Procédé selon la revendication 1 et/ou 2, caractérisé en ce que le raclage (20) est réalisé pneumatiquement (23), par exemple avec un jet de gaz (23.1) exempt d'oxygène.
  4. Dispositif pour réaliser le procédé selon la revendication 1 à 3, comprenant un récipient de fusion, un cristalliseur (3) à travers le fond duquel une bande mère (1.1) entre au moyen d'une paire de rouleaux d'entraínement en formant un ménisque (3.5) dans la zone du dispositif d'introduction dans le fond (3.2), un espace (11) au-dessus du bain de la masse fondue (3.3) dans lequel est disposée une paire de rouleaux de lissage (2) avec une fente de laminage (2.1) pour le passage du produit coulé en métal (1) avec la couche solidifiée en surface, en cours de cristallisation, un raclage (20) (3.6) du produit en cours de cristallisation avec une épaisseur (1.2) à une épaisseur (21) plus petite étant prévue entre le bain de masse fondue (3.4) et le début de la solidification (9.3) sur la surface de la bande (1.3) et les parois de l'espace (11) et la paire de rouleaux de lissage (2) étant exécutées à chaque fois avec un contrôle thermique.
  5. Dispositif selon la revendication 4, caractérisé en ce que le raclage (20) du produit en cours de cristallisation (3.6) est exécuté sous forme d'un dispositif de raclage mécanique, des couteaux (22.1).
  6. Dispositif selon la revendication 4 et/ou 5, caractérisé en ce que le raclage (20) du produit en cours de cristallisation (3.6) est exécuté sous forme d'un dispositif de raclage pneumatique (23.1).
  7. Dispositif selon l'une quelconque des revendications 4 à 6, caractérisé en ce que les dispositifs de raclage (22.1) et/ou (23.1) sont disposés avec une position variable, c'est-à-dire au niveau de leur distance par rapport au bain (3.4) et à la surface du bain (1.3).
EP00901068A 1999-01-20 2000-01-07 Procede et dispositif pour produire des bandes de metal, notamment des feuillards d'acier, munies d'un revetement Expired - Lifetime EP1144705B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19902066A DE19902066A1 (de) 1999-01-20 1999-01-20 Verfahren und Vorrichtung zur Erzeugung von beschichteten Strängen aus Metall, insbesondere von Bändern aus Stahl
DE19902066 1999-01-20
PCT/EP2000/000060 WO2000043563A2 (fr) 1999-01-20 2000-01-07 Procede et dispositif pour produire des joncs de metal munis d'un revetement, notamment des feuillards d'acier

Publications (3)

Publication Number Publication Date
EP1144705A2 EP1144705A2 (fr) 2001-10-17
EP1144705B1 true EP1144705B1 (fr) 2002-06-12
EP1144705A3 EP1144705A3 (fr) 2002-11-13

Family

ID=7894810

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00901068A Expired - Lifetime EP1144705B1 (fr) 1999-01-20 2000-01-07 Procede et dispositif pour produire des bandes de metal, notamment des feuillards d'acier, munies d'un revetement

Country Status (6)

Country Link
US (1) US6565925B1 (fr)
EP (1) EP1144705B1 (fr)
AT (1) ATE219160T1 (fr)
AU (1) AU2106200A (fr)
DE (2) DE19902066A1 (fr)
WO (1) WO2000043563A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005030766A1 (de) * 2005-07-01 2007-01-04 Sms Demag Ag Vorrichtung zur Schmelztauchbeschichtung eines Metallstranges

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1621339A1 (de) * 1967-04-29 1971-06-03 Siemens Ag Verfahren zum Herstellen von mit Zinn oder einer ueberwiegend zinnhaltigen Legierung ueberzogenem Kupferdraht,insbesondere Kupferschaltdraht,durch Feuermetallisieren
US4339480A (en) * 1980-04-11 1982-07-13 Bethlehem Steel Corporation Gas wiping apparatus and method of using
DE3600548A1 (de) 1986-01-10 1987-07-16 Alfred Haderlapp Vorrichtung zum verzinnen von stabfoermigen gegenstaenden
DE4319569C1 (de) * 1993-06-08 1994-06-16 Mannesmann Ag Verfahren und Vorrichtung zur Erzeugung von Halbzeug
DE19509681C1 (de) 1995-03-07 1996-05-02 Mannesmann Ag Verfahren und Anlage zur kontinuierlichen Erzeugung bandförmiger Bleche
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
CA2225537C (fr) * 1996-12-27 2001-05-15 Mitsubishi Heavy Industries, Ltd. Dispositif et methode de revetement metallique a chaud
US6037011A (en) * 1997-11-04 2000-03-14 Inland Steel Company Hot dip coating employing a plug of chilled coating metal

Also Published As

Publication number Publication date
ATE219160T1 (de) 2002-06-15
EP1144705A2 (fr) 2001-10-17
WO2000043563A2 (fr) 2000-07-27
EP1144705A3 (fr) 2002-11-13
DE19902066A1 (de) 2000-08-03
WO2000043563A3 (fr) 2002-09-26
AU2106200A (en) 2000-08-07
US6565925B1 (en) 2003-05-20
DE50000212D1 (de) 2002-07-18

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