EP1597405A1 - Procede et dispositif de galvanisation de bandes metalliques, en particulier de bandes d'acier - Google Patents

Procede et dispositif de galvanisation de bandes metalliques, en particulier de bandes d'acier

Info

Publication number
EP1597405A1
EP1597405A1 EP04710805A EP04710805A EP1597405A1 EP 1597405 A1 EP1597405 A1 EP 1597405A1 EP 04710805 A EP04710805 A EP 04710805A EP 04710805 A EP04710805 A EP 04710805A EP 1597405 A1 EP1597405 A1 EP 1597405A1
Authority
EP
European Patent Office
Prior art keywords
field
correction
metal strip
coils
guide channel
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.)
Withdrawn
Application number
EP04710805A
Other languages
German (de)
English (en)
Inventor
Holger Behrens
Rolf Brisberger
Bodo Falkenhahn
Hans-Georg Hartung
Bernhard Tenckhoff
Walter Trakowski
Michael Zielenbach
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
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
Priority claimed from DE10312939A external-priority patent/DE10312939A1/de
Application filed by SMS Demag AG filed Critical SMS Demag AG
Publication of EP1597405A1 publication Critical patent/EP1597405A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
    • C23C2/24—Removing excess of molten coatings; Controlling or regulating the coating thickness using magnetic or electric fields
    • 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
    • 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
    • C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
    • C23C2/36—Elongated material
    • C23C2/40—Plates; Strips
    • 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 a device for hot-dip coating of metal strips, in particular steel strips, which are passed obliquely or vertically from bottom to top through the liquid coating metal in a coating station and the coating thickness is checked after emerging, the thin metal tape, which tends to vibrate, is still sealed down in the liquid state of the coating at variable belt speed via an electromagnetic sealing field in the guide channel and is guided laterally against ferromagnetic attraction by a correction field.
  • the method for band stabilization described in the introduction can also be found in DE 195 35 854 C2.
  • the electromagnetic sealing field works there as an electromagnetic traveling field.
  • a controllable magnetic field superimposed on the modulation of the electromagnetic traveling field is applied in the region of the guide channel, the field strength and / or frequency of which can be set as a function of the sensor-detected strip position in the coating channel.
  • the device used for this purpose consists of pairs of magnetic coils, which are arranged one behind the other in the direction of tape travel. Additional coils are also provided around the guide channel.
  • the magnet coil pairs that can be controlled with regard to field strength and / or frequency can be adapted to different strip materials or strip thicknesses.
  • the method described above or the device cannot be used for very thin metal strips or for different bandwidths.
  • the invention has for its object to propose an electromagnetic seal together with a lateral ferromagnetic attraction for all currently known magnetic sealing fields.
  • one or more main coils generate a sealing field with their electromagnetic field and are designed as an electromagnetic traveling field, as a blocking field or as a pump field, and several correction fields are arranged in a selected configuration, their position and Number can be individually determined at least according to different width levels of the metal strip.
  • the advantage is the possibility of adapting to a large number of criteria, to which center deviations could previously arise due to the ferromagnetic attraction of the metal strip in the guide channel.
  • changed thickness, band waves such as, for example, center curvatures, quarterbuckles, crossbows, S-shapes and the like.
  • the main advantage is that a change in width in width steps can already be taken into account when designing the inductors, i.e. a number and the location of the correction fields are matched to a fixed metal bandwidth.
  • the expansion of the magnets can be taken into account by selecting the type of sealing using a traveling field, blocking field or pump field.
  • correction fields are distributed in position and number depending on a production program. Different metal strip widths can be coated using the same process.
  • the correction fields are controlled by separate power supply devices which are operated in phase and clock synchronism with the respective inductor.
  • Correction steps of the correction field compared to the main coil field will be simpler in that the correction fields are operated with direct current.
  • correction fields are operated locally within the sealing field in a field-strengthening or field-weakening manner.
  • the lateral position of the metal strip in the guide channel is queried via measuring coils, measurements being made within the correction fields and / or outside the Correction fields are carried out.
  • the device for hot-dip coating the metal strip is designed for a change in the width of the metal strip in such a way that the inductor has a sealing field with at least two opposing magnetic yoke surfaces with one or more main coils for an electromagnetic traveling field, a blocking field or a pump field and with a plurality of correction coils distributed in the magnetic yoke surface in a selected configuration, the number and position of which is determined in accordance with different widths and / or thicknesses of the metal strip.
  • the influences of the correction coils on the main coil field can be controlled for different bandwidths and / or thicknesses in that the correction coils are arranged in the corners of a polygon as a function of a production program.
  • correction coils are connected to separate power supply sources which are controlled in phase and clock synchronism with the respective main coils
  • the current position of the metal strip in the guide channel can also be recorded for changing speeds of the strip run by providing measuring coils inside and / or outside the correction coils for determining the current strip position within the guide channel.
  • a very precise measurement can be achieved by measuring the lateral position of the metal strip in the guide channel by means of non-contact measuring devices.
  • the correction coils can also be connected to a direct current source.
  • Fig. 3 shows the coating station with the system of the pump field
  • Fig. 4 is a front view of a sealing field with the main coil, the correction coils and the measuring coils.
  • the metal strip 1 is preheated out of an oven via deflection rollers as strip guides 2 at an angle or vertically upwards through the liquid coating metal 3 into a coating station 4.
  • the coating thickness 5 is checked in a stripping system 6.
  • the relatively thin metal strip 1 tends to vibrate, with fluctuations in the strip speed or strip speeds changed according to the selected dimensions while the coating 7 is still liquid, sealing the metal strip 1 downward via an electromagnetic sealing field 13 in the guide channel 8 and is guided laterally against ferromagnetic attraction by a correction field 14.
  • the desired constant central position of the metal strip 1 in the guide channel 8 represents an unstable equilibrium because of the action between magnetic field inductors 9 from two sides and directions. Only in the middle of the guide channel 8 is the sum of the magnetic attraction forces acting on the metal strip 1 Zero. As soon as the metal strip 1 is deflected from its central position, the distance to both inductors 9 changes. The metal strip 1 approaches one of the sealing fields 13 and moves away from the other. A solution to make the two magnetic fields of the inductors 9 so strong to rule out any displacement is ruled out because of the strong heating of the metal strip 1 associated therewith.
  • the central position of the metal strip 1 is now taken into account together with other criteria by generating a sealing field 13 in an inductor 9 with a main coil 9a and as an electromagnetic traveling field 10 (FIG. 1), as a blocking field 11 (FIG. 2) or as a pump field 12 (Fig. 3) selected.
  • Several correction fields 14 are arranged distributed in a selected configuration (FIG. 4), the position and number being individually determined at least according to different width levels of the metal strip 1. 4
  • the correction coils 14a can be arranged within the magnetic yoke surface 15, which is surrounded by the main coil 9a, in a triangular shape or, as drawn, as a polygon. In Fig. 4, both horizontal triangular shapes and vertical triangular shapes are formed.
  • the correction coils 14a or the correction fields 14 form the corners 17 of a polygon and the polygon 18 can represent a triangle, a square up to an n-corner.
  • the size of the correction coils 14a influences their position and distribution.
  • the distribution of the correction coils 14a or the correction fields 14 takes place in position and number in dependence on the selected metal strip width steps analogous to a production program.
  • the lateral or central position of the metal strip 1 in the guide channel 8 can be measured continuously using non-contact measuring devices.
  • the measuring coils 16 lie (FIG. 4) inside or outside the correction coils 14a, so that a measurement image is produced over the entire metal bandwidth. As a result, the anomalies of the metal strip shape or the position described above are detected.
  • the choice of the electromagnetic traveling field 10 or an electromagnetic blocking field 11 or an electromagnetic pump field 12 is made via the material parameters (strength, structural structure) of the metal strip 1.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating With Molten Metal (AREA)
  • Coating Apparatus (AREA)

Abstract

Procédé de galvanisation d'une bande métallique (1), en particulier d'une bande d'acier (1a), qui est guidée à travers un poste de galvanisation (4) dans lequel la bande métallique (1) est recouverte de métal de galvanisation (3). La bande métallique (1) est maintenue au milieu d'un canal de guidage (8) dans un champ d'étanchéification magnétique (13) qui étanchéifie le canal de guidage (8) vers le bas et est guidée latéralement contre l'attraction ferromagnétique, à travers un champ de correction (14). Selon la présente invention, pour sélectionner de manière appropriée une étanchéification latérale, des champs d'étanchéification (13) quelconques étant utilisés, le champ d'étanchéification (13) se présente sous forme de champ électromagnétique d'ondes progressives (10), de champ de blocage (11) ou de champ de pompage (12) et plusieurs champs de correction (14) sont répartis dans une configuration sélectionnée, la position et le nombre de ces champs étant fixés individuellement, au moins selon différentes largeurs de la bande métallique (1).
EP04710805A 2003-02-27 2004-02-13 Procede et dispositif de galvanisation de bandes metalliques, en particulier de bandes d'acier Withdrawn EP1597405A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10308834 2003-02-27
DE10308834 2003-02-27
DE10312939 2003-03-22
DE10312939A DE10312939A1 (de) 2003-02-27 2003-03-22 Verfahren und Einrichtung zum Schmelztauch-Beschichten von Metallbändern, insbesondere von Stahlbändern
PCT/EP2004/001341 WO2004076707A1 (fr) 2003-02-27 2004-02-13 Procede et dispositif de galvanisation de bandes metalliques, en particulier de bandes d'acier

Publications (1)

Publication Number Publication Date
EP1597405A1 true EP1597405A1 (fr) 2005-11-23

Family

ID=32928849

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04710805A Withdrawn EP1597405A1 (fr) 2003-02-27 2004-02-13 Procede et dispositif de galvanisation de bandes metalliques, en particulier de bandes d'acier

Country Status (11)

Country Link
US (1) US20070036908A1 (fr)
EP (1) EP1597405A1 (fr)
JP (1) JP4518416B2 (fr)
KR (1) KR20050107456A (fr)
AU (1) AU2004215221B2 (fr)
BR (1) BRPI0407909A (fr)
CA (1) CA2517319A1 (fr)
MX (1) MXPA05009170A (fr)
PL (1) PL376865A1 (fr)
RU (1) RU2344197C2 (fr)
WO (1) WO2004076707A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005014878A1 (de) * 2005-03-30 2006-10-05 Sms Demag Ag Verfahren und Vorrichtung zur Schmelztauchbeschichtung eines Metallbandes

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4128668A (en) * 1976-05-12 1978-12-05 National Steel Corporation Method of removing excess liquid coating from web edges in liquid coating thickness control
JPH06136502A (ja) * 1992-10-26 1994-05-17 Nisshin Steel Co Ltd 溶融金属めっき鋼帯の電磁力によるめっき付着量制御方法
JP2576196Y2 (ja) * 1992-11-27 1998-07-09 三菱重工業株式会社 非接触制振装置
DE4242380A1 (de) * 1992-12-08 1994-06-09 Mannesmann Ag Verfahren und Vorrichtung zum Beschichten der Oberfläche von strangförmigem Gut
DE19535854C2 (de) * 1995-09-18 1997-12-11 Mannesmann Ag Verfahren zur Bandstabilisierung in einer Anlage zum Beschichten von bandförmigem Gut
JPH1143751A (ja) * 1997-07-23 1999-02-16 Nisshin Steel Co Ltd 加工性，めっき密着性に優れた溶融めっき鋼帯の製造方法及び装置
JP3497353B2 (ja) * 1997-09-12 2004-02-16 Ｊｆｅスチール株式会社 溶融金属めっき方法および溶融金属めっき装置
DE10014867A1 (de) * 2000-03-24 2001-09-27 Sms Demag Ag Verfahren und Einrichtung zum Schmelztauchbeschichten von Metallsträngen, insbesondere von Stahlband
RS50049B (sr) * 2000-11-10 2008-11-28 Sollac, Uređaj oblaganja sa namakanjem metalne trake
FR2816637B1 (fr) * 2000-11-10 2003-10-24 Lorraine Laminage Installation de revetement au trempe d'une bande metallique
DE10210430A1 (de) * 2002-03-09 2003-09-18 Sms Demag Ag Vorrichtung zur Schmelztauchbeschichtung von Metallsträngen
DE10210429A1 (de) * 2002-03-09 2003-09-18 Sms Demag Ag Vorrichtung zur Schmelztauchbeschichtung von Metallsträngen
DE10254306A1 (de) * 2002-11-21 2004-06-03 Sms Demag Ag Verfahren und Vorrichtung zur Schmelztauchbeschichtung eines Metallstranges
DE10255995A1 (de) * 2002-11-30 2004-06-09 Sms Demag Ag Vorrichtung und Verfahren zur Schmelztauchbeschichtung eines Metallstranges
DE10255994A1 (de) * 2002-11-30 2004-06-09 Sms Demag Ag Verfahren und Vorrichtung zur Schmelztauchbeschichtung eines Metallstranges
DE10330656A1 (de) * 2003-07-08 2005-01-27 Sms Demag Ag Vorrichtung zur Schmelztauchbeschichtung eines Metallstranges

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004076707A1 *

Also Published As

Publication number Publication date
RU2344197C2 (ru) 2009-01-20
PL376865A1 (pl) 2006-01-09
MXPA05009170A (es) 2005-10-20
JP4518416B2 (ja) 2010-08-04
AU2004215221B2 (en) 2009-06-11
BRPI0407909A (pt) 2006-02-14
RU2005130001A (ru) 2006-02-10
JP2006519306A (ja) 2006-08-24
KR20050107456A (ko) 2005-11-11
CA2517319A1 (fr) 2004-09-10
WO2004076707A1 (fr) 2004-09-10
AU2004215221A1 (en) 2004-09-10
US20070036908A1 (en) 2007-02-15

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