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US20040177903A1 - Process for the controlled oxidation of a strip before continuous galvanizing, and galvanizing line - Google Patents

Process for the controlled oxidation of a strip before continuous galvanizing, and galvanizing line Download PDF

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Publication number
US20040177903A1
US20040177903A1 US10/790,712 US79071204A US2004177903A1 US 20040177903 A1 US20040177903 A1 US 20040177903A1 US 79071204 A US79071204 A US 79071204A US 2004177903 A1 US2004177903 A1 US 2004177903A1
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United States
Prior art keywords
strip
galvanizing
furnace
temperature
steel
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.)
Abandoned
Application number
US10/790,712
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English (en)
Inventor
Mignard Francois
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Fives Stein SA
Original Assignee
Stein Heurtey SA
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Filing date
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Application filed by Stein Heurtey SA filed Critical Stein Heurtey SA
Assigned to STEIN HEURTEY reassignment STEIN HEURTEY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MIGNARD, FRANCOIS
Publication of US20040177903A1 publication Critical patent/US20040177903A1/en
Assigned to FIVES STEIN reassignment FIVES STEIN CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: STEIN HEURTEY
Abandoned legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/561—Continuous furnaces for strip or wire with a controlled atmosphere or vacuum
    • 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
    • C23C2/0034—Details related to elements immersed in bath
    • C23C2/00342—Moving elements, e.g. pumps or mixers
    • C23C2/00344—Means for moving substrates, e.g. immersed rollers or immersed bearings
    • 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
    • C23C2/0038—Apparatus characterised by the pre-treatment chambers located immediately upstream of the bath or occurring locally before the dipping process
    • 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
    • C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
    • C23C2/0222—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating in a reactive atmosphere, e.g. oxidising or reducing atmosphere
    • 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
    • C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
    • C23C2/0224—Two or more thermal pretreatments
    • 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
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/06—Zinc or cadmium or alloys based thereon
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/0005—Details for water heaters
    • F24H9/0042—Cleaning arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators

Definitions

  • the invention relates to a process for the continuous hot-dip galvanizing of a steel strip, the steel containing oxidizable addition elements in a proportion allowing the mechanical properties of the steel to be improved.
  • Hot-dip galvanizing furnaces usually comprise several sections equipped to carry out various steps of the heat treatment, these being, in general: heating, soaking and cooling.
  • the heat treatment furnace is conditioned using an inert or reducing atmosphere, generally consisting of a nitrogen/hydrogen mixture intended to reduce the iron oxides present on the surface of steel sheets before they are galvanized.
  • the steel strip hot-dip galvanizing process does not allow correct galvanizing of multiphase steel grades having a content of oxidizable elements, such as Si, Cr, Mn, Mo, etc., that is sufficient to improve the mechanical properties of the steel.
  • the object of the proposed invention is to provide a continuous hot-dip galvanizing device and process that allow correct treatment of a strip containing oxidizable addition elements whose content is sufficient to improve the mechanical properties of the steel.
  • the invention relates to a line for the continuous hot-dip galvanizing of a steel strip containing oxidizable addition elements in a proportion allowing the mechanical properties of the steel to be improved, in which line the strip passes through a galvanizing furnace in a reducing atmosphere before being dipped into a galvanizing bath, this line being characterized in that it comprises, upstream of the galvanizing furnace, a means for heating the strip to a suitable temperature followed by a zone for exposing the strip to an oxidizing atmosphere, the oxygen content of which is such that, owing to the temperature of the strip and the duration of the treatment, the oxidizable addition elements in the steel strip are oxidized at the surface and immediately beneath the surface of the strip before they can migrate to the said surface, in order to form thereat a layer of oxides capable of causing galvanizing defects.
  • the iron oxides produced during this operation will be reduced while the strip is passing through the furnace.
  • the strip is heated to a temperature of between 150° C. and 400° C., preferably between approximately 150° C. and 300° C., for the oxidation treatment.
  • the oxidation of its surface will be controlled, for a given oxidizing atmosphere, by the choice of a pair of parameters, namely the temperature and the residence time of the strip in the oxidizing atmosphere.
  • This temperature/residence time pair will be continuously monitored and will take the operating speed of the line into account, in particular the instantaneous run speed of the strip.
  • the strip oxidation treatment may be controlled by regulating the heating power upstream of the furnace (thus varying the temperature of the strip) or by varying the distance between the heating element located upstream of the furnace and the inlet of the furnace (which varies the oxidation time).
  • the oxidizing atmosphere in which the controlled oxidation operation is carried out on the surface of the strip may be the ambient air or any other confined atmosphere in a chamber which is installed upstream of the furnace and the oxygen content of which will be controlled.
  • FIG. 1 is a diagram of a continuous hot-dip galvanizing line for implementing the process of the invention
  • FIG. 2 is a graph showing the variation in temperature of a point on the strip, plotted on the y-axis as a function of the position of the point on the line plotted on the x-axis;
  • FIG. 3 is a diagram of an alternative embodiment of the galvanizing line.
  • FIGS. 4 to 6 are other alternative embodiments.
  • FIG. 1 of the drawings Shown schematically in FIG. 1 of the drawings is a line for the continuous hot-dip galvanizing of a steel strip 1 in a molten-zinc galvanizing bath 2 .
  • the line includes a galvanizing furnace 3 according to the prior art, for treating the strip 1 before it is dipped into the bath 2 .
  • the furnace comprises several sections equipped for carrying out in succession the various steps of the heat treatment, which are in general heating, soaking and then cooling down to a temperature suitable for depositing the zinc on the surface of the strip.
  • the atmosphere in the furnace 3 is reducing, produced by a conventional nitrogen/hydrogen gas mixture with a dew point maintained as low as possible.
  • the steel strip 1 contains oxidizable addition elements, such as Si, Cr, Mn and Mo, in proportions sufficient to improve its mechanical properties. Hitherto, this type of galvanizing line has not allowed a steel containing such oxidizable elements in such proportions to be correctly galvanized in a continuous hot-dip operation since, as explained above, during the high-temperature heating and soaking treatment, a very thin layer of oxides of these addition elements forms on the surface and remains, right in the molten zinc, thereby causing defects in the coating.
  • oxidizable addition elements such as Si, Cr, Mn and Mo
  • the strip 1 is subjected, upstream of the furnace 3 , in a zone 8 to an oxidation treatment under atmosphere/temperature and residence time conditions such that the oxidizable addition elements, especially Si, Cr, Mn or Mo, are oxidized beneath the surface of the strip before they can migrate to this surface in order to form an oxide layer capable of causing galvanizing defects.
  • the oxidizable addition elements especially Si, Cr, Mn or Mo
  • Iron oxides are formed on the surface of the strip during treatment in the zone 8 and going from the zone 8 as far as the inlet of the furnace. These iron oxides are reduced within the chamber of the furnace 3 in such a way that the strip 1 , when it enters the molten zinc bath 2 , has a surface with a layer of reduced oxides of the addition elements, which allows correct galvanizing to occur.
  • the zone 8 includes a heating means for raising the strip 1 to the desired temperature, typically between 150° C. and 400° C.
  • a control means 7 consisting of a computer is provided in order to adjust the heating of the strip on the basis of sensors, such as a strip speed sensor 4 , a strip surface temperature sensor 5 and a strip surface emissivity sensor 6 .
  • the oxidation rate is controlled, for a given oxidizing atmosphere, as a result of controlling the final temperature of the strip 1 as it leaves the heating means 8 and the residence time of the strip 1 in the zone 8 and between the zone 8 and the inlet of the furnace 3 .
  • the combination of these parameters is optimized depending on the grade of steel to be treated, the speed of the line and the thickness and width of the strip.
  • the heating means 8 is chosen to have a low thermal inertia and a high reactivity so as to maintain control of the surface oxidation of the strip during transient phases brought about by changes in the speed of the line or changes in geometry of the strip 1 .
  • This heating means 8 may consist of a gas furnace, of the naked flame or indirect heating type, but preferably his heating means will consist of an electromagnetic induction furnace.
  • the induction furnace has at least one induction coil that can be moved up to or away from the galvanizing furnace in order to vary the heating rate produced.
  • the oxidation treatment of the strip 1 in the zone 8 and between the zone 8 and the inlet of the furnace 3 will preferably be carried out in air.
  • the oxidation of the strip will then be controlled by controlling two parameters, namely the temperature of the strip leaving the zone 8 and the residence time of the strip in air between its entry into the zone 8 and its entry into the furnace 3 .
  • the temperature will have to be increased when the speed of the line increases, so as to compensate for the shorter residence time of the strip at high temperature in the air.
  • FIG. 2 shows the temperature variation of a point on the strip 1 plotted on the y-axis as a function of the position of this point on the line plotted on the x-axis.
  • the temperature of the strip is low, for example below 100° C., and corresponds to the segment 9 .
  • the strip 1 passes through the heating means 8 , its temperature increases, for example as per the inclined segment 10 .
  • the temperature of the strip 1 from the point where it leaves the heating means 8 up to the point where it enters the furnace 3 remains approximately constant, as shown schematically by the segment 11 —the oxidation treatment continues during this phase.
  • the strip 1 will continue to be heated in a cycle tailored to its metallurgy and shown symbolically by 12 .
  • the oxidation of the strip may be controlled by varying one or more of the parameters presented in FIG. 2. It is possible to vary the temperature of the strip by varying the mean slope of the segment 10 , in order to obtain a variable temperature hold level of the segment 11 . It is also possible to vary the duration of the temperature hold 11 or to modify the effectiveness of the strip oxidation during the temperature hold 11 , for example by varying the concentration of oxygen in the oxidizing atmosphere to which the strip is exposed during this temperature hold.
  • FIG. 3 shows a variation of FIG. 1 in which the heating zone 8 is connected in a sealed manner to the inlet of the furnace 3 by the chamber 13 .
  • the oxygen concentration so as to tailor the oxidation of the strip to the specific type of steel, to the speed of the strip and to any other parameter necessary for controlling the oxidation rate of the strip.
  • the oxygen content of the chamber 13 and the means for sealing this chamber with respect to the outside or with respect to the chamber of the furnace 3 will be controlled using the means of the prior art.
  • the duration of the oxidation treatment may be advantageously controlled, according to the operating parameters of the line, by modifying the length of strip 1 between the outlet of the heating means 8 and the inlet of the furnace 3 .
  • This length variation may be accomplished in various ways.
  • One possible way consists in moving the heating means 8 along the direction of the strip 1 , as illustrated schematically in FIG. 4 by the dashed arrow 14 .
  • the treatment type decreases, whereas when the heating means 8 is moved further away from the furnace the treatment time increases.
  • FIG. 5 A second possible way is illustrated by FIG. 5.
  • the heating means 8 are stationary and, between the heating means 8 and the furnace 3 , the strip 1 passes over a fixed roll 15 and over a moving roll 16 , which can be moved parallel to the direction of the strip as illustrated schematically by the arrow 17 .
  • the moving roll 16 When the moving roll 16 is moved to the right, the length of strip between the heating means 8 and the furnace 3 increases, thereby increasing the duration of the oxidation treatment. Conversely, when the moving roll 16 is moved to the left in FIG. 5, the length of strip decreases, thereby reducing the treatment time.
  • This arrangement with a moving roll 16 and two horizontal strip strands may be repeated several times with several rolls and several strands of variable length, so as to increase the length of strip between 8 and 3 and to increase the possible variation in this length.
  • FIG. 6 shows an alternative embodiment of FIG. 5, in which the heating means 8 are stationary and the strip 1 passes over two fixed rolls 20 and 21 and over one moving roll 19 , which can be moved perpendicular to the main direction of the strip as illustrated schematically by the arrow 18 .
  • the moving roll 19 When the moving roll 19 is moved upwards, the length of strip between the heating means 8 and the furnace 3 increases, thereby increasing the oxidation treatment time. Conversely, when the moving roll 19 is moved downwards in FIG. 6, the length of strip decreases, thereby reducing the treatment time.
  • This arrangement with a roll 19 and two vertical strands may be repeated several times so as to increase the length of strip between 8 and 3 and to increase the possible variation in this length.
  • the strip 1 enters the molten zinc bath 2 with a surface on which the formation of oxides has been limited, including in the case of the oxides of the addition elements, in such a way that the adhesion of the zinc to this surface can be optimal.
  • the galvanizing line according to the invention constitutes a flexible production tool allowing economic galvanizing of various grades of steel, irrespective of the nature of their additives, without any defect in the zinc coating on their surface.
  • the control means 7 and the heating means 8 owing to the speed with which they can be adapted, allow the oxidation control process to be adapted to products of any dimensions and to any variation in the speed of the production line.
  • the devices needed to implement the method of controlling the oxidation of a strip containing additives such as Si, Cr, Mn, Mo, etc. may be easily added to an existing plant in order to extend its production range or, in a plant in which they are installed, they can be readily neutralized for the production of grades of steel not containing these additives.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Coating With Molten Metal (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Electroplating Methods And Accessories (AREA)
US10/790,712 2003-03-12 2004-03-03 Process for the controlled oxidation of a strip before continuous galvanizing, and galvanizing line Abandoned US20040177903A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0303058A FR2852330B1 (fr) 2003-03-12 2003-03-12 Procede d'oxydation controlee de bandes avant galvanisation en continu et ligne de galvanisation
FR03-03058 2003-03-12

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Publication Number Publication Date
US20040177903A1 true US20040177903A1 (en) 2004-09-16

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US10/790,712 Abandoned US20040177903A1 (en) 2003-03-12 2004-03-03 Process for the controlled oxidation of a strip before continuous galvanizing, and galvanizing line

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US (1) US20040177903A1 (zh)
EP (1) EP1457580A1 (zh)
KR (1) KR20040080377A (zh)
CN (1) CN100554489C (zh)
DE (1) DE04290508T1 (zh)
ES (1) ES2226608T1 (zh)
FR (1) FR2852330B1 (zh)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006061151A1 (de) * 2004-12-09 2006-06-15 Thyssenkrupp Steel Ag Verfahren zum schmelztauchbeschichten eines bandes aus höherfestem stahl
WO2007124781A1 (de) * 2006-04-26 2007-11-08 Thyssenkrupp Steel Ag Verfahren zum schmelztauchbeschichten eines stahlflachproduktes aus höherfestem stahl
US20100178527A1 (en) * 2007-05-02 2010-07-15 Corus Staal B.V. Method for hot dip galvanizing of ahss or uhss strip material, and such material
US20120135261A1 (en) * 2009-05-28 2012-05-31 Bluescope Steel Limited Metal-coated steel strip
WO2012163332A1 (de) * 2011-05-27 2012-12-06 Thermprotec Gmbh Verfahren und vorrichtung zur herstellung oxidierter metallbänder
US8609192B2 (en) 2007-09-03 2013-12-17 Siemens Vai Metals Technologies Sas Method and device for controlling oxidizing-reducing of the surface of a steel strip running continuously through a radiant tubes furnace for its galvanizing
JP2017002361A (ja) * 2015-06-11 2017-01-05 Ｊｆｅスチール株式会社 溶融金属めっき鋼帯の製造方法および溶融金属めっき鋼帯の製造ライン
WO2017115180A1 (en) * 2015-12-28 2017-07-06 Sabic Global Technologies B.V. Synchronized sink roll
US11131004B2 (en) * 2015-12-30 2021-09-28 Fives Stein Device and method for carrying out controlled oxidation of metal strips in a continuous furnace
CN113621908A (zh) * 2021-07-06 2021-11-09 无锡苏盛金属制品有限公司 一种热镀金属钢带的制造工艺及方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112461393B (zh) * 2020-12-04 2021-06-15 中国科学院力学研究所 同轴热电偶瞬态热流传感器氧化式绝缘层加工制作装置

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US3518109A (en) * 1968-01-15 1970-06-30 Inland Steel Co Apparatus and method for controlling thickness of molten metal coating by a moving magnetic field
US3925579A (en) * 1974-05-24 1975-12-09 Armco Steel Corp Method of coating low alloy steels
US4059494A (en) * 1974-11-19 1977-11-22 Sumitomo Aluminum Smelting Co., Ltd. Process for continuous electrolytic coloring of aluminum or aluminum base alloy strip and wire
US5480499A (en) * 1993-02-01 1996-01-02 Sms Schloemann-Siemag Aktiengesellschaft Method for guiding a steel strip during its passage through a continuous treatment plant
US20020162612A1 (en) * 2000-03-08 2002-11-07 Stein Heurtey Preheating of metal strip, especially in galvanizing or annealing lines
US20030047255A1 (en) * 2001-08-21 2003-03-13 Didier Delaunay Process for the hot-dip galvanizing of metal strip made of high-strength steel

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US20080308191A1 (en) * 2004-12-09 2008-12-18 Thyssenkrupp Steel Ag Process For Melt Dip Coating a Strip of High-Tensile Steel
WO2006061151A1 (de) * 2004-12-09 2006-06-15 Thyssenkrupp Steel Ag Verfahren zum schmelztauchbeschichten eines bandes aus höherfestem stahl
US8652275B2 (en) 2004-12-09 2014-02-18 Thyssenkrupp Steel Ag Process for melt dip coating a strip of high-tensile steel
US8636854B2 (en) 2006-04-26 2014-01-28 Thyssenkrupp Steel Ag Method for melt immersion coating of a flat steel product made of high strength steel
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US8609192B2 (en) 2007-09-03 2013-12-17 Siemens Vai Metals Technologies Sas Method and device for controlling oxidizing-reducing of the surface of a steel strip running continuously through a radiant tubes furnace for its galvanizing
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CN113621908A (zh) * 2021-07-06 2021-11-09 无锡苏盛金属制品有限公司 一种热镀金属钢带的制造工艺及方法

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DE04290508T1 (de) 2005-03-31
FR2852330A1 (fr) 2004-09-17
ES2226608T1 (es) 2005-04-01
FR2852330B1 (fr) 2007-05-11
CN1530458A (zh) 2004-09-22
CN100554489C (zh) 2009-10-28
KR20040080377A (ko) 2004-09-18

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