WO2015110490A1 - Procédé et installation de revêtement au trempé à chaud de feuillard d'acier laminé à chaud - Google Patents

Procédé et installation de revêtement au trempé à chaud de feuillard d'acier laminé à chaud Download PDF

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Publication number
WO2015110490A1
WO2015110490A1 PCT/EP2015/051175 EP2015051175W WO2015110490A1 WO 2015110490 A1 WO2015110490 A1 WO 2015110490A1 EP 2015051175 W EP2015051175 W EP 2015051175W WO 2015110490 A1 WO2015110490 A1 WO 2015110490A1
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WO
WIPO (PCT)
Prior art keywords
strip
thickness
cold
galvanizing
hot
Prior art date
Application number
PCT/EP2015/051175
Other languages
German (de)
English (en)
Inventor
Andreas Gramer
Werner Haupt
Hartmut Sulenski
Anja Maria Eder
Peter Jollet
Hans Georg Klöckner
Original Assignee
Sms Group Gmbh
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Application filed by Sms Group Gmbh filed Critical Sms Group Gmbh
Priority to CN201580005531.2A priority Critical patent/CN106103783A/zh
Priority to EP15702989.3A priority patent/EP3097218B1/fr
Publication of WO2015110490A1 publication Critical patent/WO2015110490A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/227—Surface roughening or texturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/28—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by cold-rolling, e.g. Steckel cold mill
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0236—Cold rolling
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0242—Flattening; Dressing; Flexing
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0278—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular surface treatment
    • C21D8/0284—Application of a separating or insulating coating
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
    • C21D8/0421—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the working steps
    • C21D8/0436—Cold rolling
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
    • C21D8/0421—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the working steps
    • C21D8/0442—Flattening; Dressing; Flexing
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
    • C21D8/0478—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing involving a particular surface treatment
    • C21D8/0484—Application of a separating or insulating coating
    • 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
    • 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
    • C21D9/562—Details
    • 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
    • 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
    • C23C2/024—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by cleaning or etching
    • 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
    • C23C2/26—After-treatment
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B2001/228—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length skin pass rolling or temper rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2265/00—Forming parameters
    • B21B2265/14—Reduction rate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/02—Shape or construction of rolls
    • B21B27/021—Rolls for sheets or strips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/04—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring thickness, width, diameter or other transverse dimensions of the product

Definitions

  • the invention relates to a method for hot dip coating of
  • hot rolled steel strip preferably in a continuous strip plant, in which the hot strip is subjected to a pretreatment for descaling, is galvanized, is reduced by cold working in its thickness and a
  • the invention relates to a plant for producing hot-dip coated, hot rolled steel strip.
  • the liberation of the hot strip from the scale (pretreatment) as a prerequisite for cold forming and galvanizing is preferably carried out by pickling, rinsing and drying.
  • a straightening and / or a chemical treatment can be provided for the aftertreatment.
  • Hot dip galvanized steel strip a process and equipment having been known to improve the thickness tolerance of controlled thickness reduction which is performed after galvanizing.
  • a rolling stand is provided in the process line, wherein at least one
  • Thickness gauge in the outlet of the rolling stand the achievement of the finished thickness is controlled and the deviations from this up or down as a control signal to the employment of the rolling stand are returned to increase the thickness reduction or reduce accordingly.
  • Bundled coils with a desired diameter In this known method, technological disadvantages arise, individually or together for the production of high quality, galvanized
  • the soft zinc layer on the much harder steel strip in the controlled thickness reduction by the necessary high pressures in the nip to achieve the desired decreases in the range of 2 to 30%, preferably 4 to 10%, heavily loaded, resulting in increased abrasion of zinc particles lead, which deposit as dirt on the belt surface and tape cleanliness for downstream
  • the invention is therefore an object of the invention to provide a method and a system of the type mentioned, with which can reach high quality, galvanized bands and strip surfaces without the disadvantages mentioned.
  • the hot strip removed from the scale is cold-formed in a process step preceding the galvanizing by reducing its strip thickness by less than 30%, preferably 0.5 to 10%.
  • the size of the cold forming and thus the reduction of the strip thickness both directly from the percentage ratio of the strip thicknesses, as well as indirectly.
  • a preferred procedural measure provides that in the
  • the thickness of the cold-formed strip measured and a deviation from a
  • Target thickness as a controlled variable for reducing the thickness of the cold forming
  • the galvanizing the size of the cold forming preferably the reduction in thickness
  • the size of the cold forming which also includes a determined from the difference in belt speeds in the inlet and delivery of the cold rolling mill, a controlled thickness control is unnecessary when using hot strip with correspondingly narrow hot strip thickness tolerances.
  • Thickness decrease can not be achieved.
  • a control can be provided for a constant reduction in thickness.
  • the size of the cold working after galvanizing to reduce the strip thickness can be controlled and controlled to a desired value, which in the use of hot strip with
  • Thickness control makes unnecessary.
  • the cold forming after galvanizing work rolls come with a Mittenrauwert of less than 10 ⁇ , preferably 0.2 to 3.0 ⁇ , used and thereby impress the surface of the strip on the surface structure of the finished product.
  • the inventive method thus provides the conditions to adjust the tape roughness before galvanizing by cold forming to a required value and / or reduce the thickness tolerance before galvanizing by cold rolling and / or reduce the strip thickness by cold rolling before galvanizing to a desired level, single of the aforementioned parameters
  • Tape roughness, tape thickness tolerance and tape thickness can be adjusted or supplemented by further cold forming after galvanizing in coordination with the upstream cold forming.
  • the hot strip galvanizing can be carried out with at least one controlled thickness control either before or after galvanizing or without controlled reduction in thickness by controlling the size of the cold forming or the degree of temper rolling.
  • Strip pretreatment and / or the cold forming are carried out in separate from a galvanizing line, outsourced treatment lines, wherein in the galvanizing line in addition to the application of the zinc layer also cold forming after galvanizing and post-treatment of the strip can be done.
  • Fabrication of hot dip coated hot rolled steel strip is characterized in that the hot strip is passed through a belt pre-treatment device to remove the scale, then by cold working the strip thickness is reduced by less than 30%, preferably 0.5 to 10%, and then following passes through the strip galvanizing, in which the band passes through a molten bath.
  • Thickness reducing device designed as a cold rolling mill, which is associated with at least one measuring device in the outlet with feedback of thickness control signals to the cold rolling mill.
  • the cold forming to reduce thickness is performed with a cold rolling mill, in which in a turn preferred embodiment, at least one meter is disposed in the outlet of the cold rolling mill and either deviations from a desired thickness as a control signal to the thickness control of the cold rolling mill are returned or which by a regulation to a constant size of
  • Thickness reduction is regulated.
  • the strip galvanizing followed by a cold rolling mill further thickness reduction device connects, in which the strip thickness is reduced by less than 30%, preferably 0.5 to 10%, wherein at least At least one measuring device in the outlet with feedback of measuring signals for thickness control is assigned to this further cold rolling mill.
  • the strip galvanizing device is followed by a further finishing mill designed as a skimming mill with a degree of skimming of less than 3%, preferably 0.5 to 2%
  • Thickness reduction devices for cold forming for embossing the strip surface structure of the finished product Work rolls which have a surface structure with a mean roughness Ra of less than 5 ⁇ ,
  • 1 is a schematic diagram of a continuous process line for
  • FIG. 2 is a schematic diagram of a semicontinuous process line for
  • hot-dip coating equipment 1 operating in continuous operation hot-dip coating equipment 1 is to be treated, hot-rolled steel strip 2 from a z. B. with not shown straightening units and a tape storage equipped inlet part ET initially a strip pretreatment device 3 is supplied with a tinder breaker 4 or the like and a stain 5 and a sink 6 for removing the scale from the steel strip or band 2.
  • the band pretreatment device 3 is followed by the dashed bordered or highlighted core of the
  • Hot dip coating plant 1 namely, a strip galvanizing 7 upstream thickness reduction device 8, designed as a cold rolling KWW as a preferred form of cold forming before the steel or hot strip 2 in the Bandverzinkungseinnchtung 7 for applying the coating passes through a molten bath 9.
  • Thickness gauge 10 with feedback of the measured signals to the cold rolling mill arranged for control at deviations measured by a desired thickness.
  • the KWW can also use a measuring method that is not the Thickness, but the size of the cold forming or a skin passage measures and outputs as a control signal.
  • the cold forming is carried out with a reduction of the sheet thickness by less than 30%, preferably 0.5 to 10%.
  • Cold rolling or temper rolling is imparted to the strip a surface structure, to which the work rolls with a surface texture with a mean roughness Ra of less than 10 ⁇ , preferably 0.2 to 3 ⁇ , are formed.
  • FIG. 1 further shows that the strip galvanizing device 7 can optionally be followed by a further thickness reduction device 11, in a preferred embodiment also as a cold rolling mill KWW.
  • the work rolls of this further thickness reduction device 1 1 can then be designed so that they ⁇ with a mean roughness Ra of less than 10 ⁇ , preferably 0.2 to 3, in the cold forming the band, the surface structure of
  • Thickness reducing 8 before galvanizing and a
  • Dickenreduzier issued 1 1 after galvanizing, at least with a arranged in the outlet of the further thickness reduction device 1 1 measuring device 12, the deviation of a target strip thickness as a controlled variable of the cold forming of the thickness reduction device 1 1 returned.
  • the thickness reduction device 1 1 for cold forming in the preferred form of a cold rolling mill can perform the process of the skin-forming with less than 3%, preferably 0.5 to 2%, tempering behind the strip galvanizing 7 instead of a controlled thickness control. Furthermore, that can
  • KWW perform the cold forming with less than 30%, preferably 0.5 to 10%, even with a constant setpoint of the cold forming.
  • the hot strip 2 cold-formed in this way with a surface structure then passes through a strip aftertreatment device 13, which in the
  • passivation may include from which the hot strip 2 as
  • Hot-dip coating installation 100 differs from the previously described, continuously operating hot-dip coating installation 1 only in that process steps preceding galvanizing are outsourced, in the exemplary embodiment process line I for strip pretreatment and process line II for cold forming, which are separate from process line III for strip galvanizing ,
  • each line is associated with an inlet part ET and an outlet part AT, wherein the galvanizing line III next to the strip galvanizing 7 upstream of this band cleaning 14 and integrated the further thickness reduction device 1 1 following strip aftertreatment device 13th includes.
  • scale breaker For example, scale breaker

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Coating With Molten Metal (AREA)

Abstract

L'invention concerne un procédé et une installation (1; 100) de production de feuillard d'acier laminé à chaud (2) revêtu au trempé à chaud, de préférence dans une ligne de processus en continu, comprenant : un équipement de prétraitement du feuillard (3) servant au décalaminage, de préférence par attaque acide, rinçage et séchage; des équipements de façonnage à froid (8; 11) servant à réduire l'épaisseur du feuillard, de préférence par laminage à froid; et un équipement de post-traitement en aval, par exemple un équipement de dressage par traction et flexion et/ou un équipement de post-traitement chimique. Pour obtenir des feuillards galvanisés et des surfaces de feuillards de haute qualité, l'équipement de prétraitement du feuillard (3) donnant le feuillard laminé à chaud décalaminé est suivi en premier lieu de l'équipement de réduction d'épaisseur (8), dans lequel l'épaisseur du feuillard est réduite de moins de 30 %, de préférence de 0,5 à 10 %, et cet équipement est lui-même suivi de l'équipement de galvanisation du feuillard (7), dans lequel le feuillard laminé à chaud passe dans un bain en fusion.
PCT/EP2015/051175 2014-01-22 2015-01-21 Procédé et installation de revêtement au trempé à chaud de feuillard d'acier laminé à chaud WO2015110490A1 (fr)

Priority Applications (2)

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CN108480417B (zh) * 2018-02-01 2021-04-13 日照宝华新材料有限公司 基于薄板坯连铸连轧热基原料及酸镀连续产线生产600g锌层无锌花热镀锌板的方法
CN108220855B (zh) * 2018-02-08 2020-04-24 鞍山发蓝股份公司 一种高强度包装用镀锌钢带的制备方法
CN108950382A (zh) * 2018-06-25 2018-12-07 日照钢铁控股集团有限公司 一种基于无头带钢生产线和酸镀连续产线生产热基无花镀锌板的方法
DE102021129934A1 (de) * 2021-11-17 2023-05-17 Thyssenkrupp Steel Europe Ag Verfahren zum Herstellen eines schmelztauchbeschichteten Stahlblechs und schmelztauchbeschichtetes Stahlblech

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EP0613736A1 (fr) * 1993-02-26 1994-09-07 Hitachi, Ltd. Système d'enduction pour bandes laminées à chaud
JP2965969B1 (ja) * 1998-07-17 1999-10-18 川崎重工業株式会社 鋼板の連続めっき方法
EP1681363A1 (fr) * 2003-09-30 2006-07-19 Nippon Steel Corporation Fine feuille d'acier a resistance elevee et rapport de rendement eleve et fine feuille d'acier galvanisee a chaud, a resistance elevee et rapport de rendement eleve, ayant une excellente aptitude a la soudure et une excellente ductilite, et fine feuille d'acier alliee, galvanisee a chaud, a resistan
WO2006097237A1 (fr) * 2005-03-18 2006-09-21 Sms Demag Aktiengesellschaft Reduction controlee d'epaisseur pour un feuillard d'acier lamine a chaud et revetu par immersion a chaud et installation correspondante
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WO2013121963A1 (fr) * 2012-02-17 2013-08-22 新日鐵住金株式会社 Feuille d'acier, feuille d'acier plaquée, procédé de fabrication d'une feuille d'acier et procédé de fabrication d'une feuille d'acier plaquée

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EP3097218A1 (fr) 2016-11-30
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CN106103783A (zh) 2016-11-09

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