WO2020025259A1 - Procédé pour l'amélioration de l'aptitude au revêtement d'une bande métallique - Google Patents

Procédé pour l'amélioration de l'aptitude au revêtement d'une bande métallique Download PDF

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Publication number
WO2020025259A1
WO2020025259A1 PCT/EP2019/068251 EP2019068251W WO2020025259A1 WO 2020025259 A1 WO2020025259 A1 WO 2020025259A1 EP 2019068251 W EP2019068251 W EP 2019068251W WO 2020025259 A1 WO2020025259 A1 WO 2020025259A1
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WIPO (PCT)
Prior art keywords
metal strip
metal
laser
oxides
coated
Prior art date
Application number
PCT/EP2019/068251
Other languages
German (de)
English (en)
Inventor
Tomaz LAVRIC
Hannes SANTER
Original Assignee
Andritz 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 Andritz Ag filed Critical Andritz Ag
Publication of WO2020025259A1 publication Critical patent/WO2020025259A1/fr

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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B08B7/0035—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like
    • B08B7/0042—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like by laser
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/03—Observing, e.g. monitoring, the workpiece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/0604—Shaping the laser beam, e.g. by masks or multi-focusing by a combination of beams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/0604—Shaping the laser beam, e.g. by masks or multi-focusing by a combination of beams
    • B23K26/0619—Shaping the laser beam, e.g. by masks or multi-focusing by a combination of beams with spots located on opposed surfaces of the workpiece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/067—Dividing the beam into multiple beams, e.g. multifocusing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/352—Working by laser beam, e.g. welding, cutting or boring for surface treatment
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/82—Descaling by thermal stresses
    • 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
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • 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
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    • 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
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
    • C23C14/14—Metallic material, boron or silicon
    • C23C14/16—Metallic material, boron or silicon on metallic substrates or on substrates of boron or silicon
    • C—CHEMISTRY; METALLURGY
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    • 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
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
    • C23C14/228—Gas flow assisted PVD deposition
    • 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
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
    • C23C14/24—Vacuum evaporation
    • 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
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
    • C23C14/56—Apparatus specially adapted for continuous coating; Arrangements for maintaining the vacuum, e.g. vacuum locks
    • C23C14/562—Apparatus specially adapted for continuous coating; Arrangements for maintaining the vacuum, e.g. vacuum locks for coating elongated substrates
    • 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
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    • 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
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    • 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
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    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
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    • 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
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    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
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    • C—CHEMISTRY; METALLURGY
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    • 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
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    • 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
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    • 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
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    • C—CHEMISTRY; METALLURGY
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    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
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    • C25D5/36—Pretreatment of metallic surfaces to be electroplated of iron or steel
    • C—CHEMISTRY; METALLURGY
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    • C—CHEMISTRY; METALLURGY
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    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
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    • B08B15/04—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area from a small area, e.g. a tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/16—Bands or sheets of indefinite length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/02—Iron or ferrous alloys
    • B23K2103/04—Steel or steel alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/08—Non-ferrous metals or alloys
    • B23K2103/10—Aluminium or alloys thereof
    • 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
    • C21D9/573—Continuous furnaces for strip or wire with cooling
    • C21D9/5735—Details
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon

Definitions

  • the subject of this invention is a method for treating a metal strip.
  • the metal strip is heat-treated in an oven and then in one
  • High-strength steel grades such as dual-phase steel (DP steel),
  • Strength Steels combine high strength with optimized formability. These steels are mainly used as sheet metal in the automotive industry. They enable a reduced weight and greater freedom in design for various structural reinforcements and crash components.
  • the structure of which consists of a ferritic (soft) matrix, into which a predominantly martensitic (strength-increasing) second phase forms an island on the
  • This structure has a relatively low and therefore favorable for the forming process
  • Yield strength and high tensile strength are advantageous for complex deep-drawn parts.
  • Carbon steel, carbon steel and AHS steel are coated. For example, they are coated with a zinc layer or a zinc alloy in a metal bath. In newer processes, these tapes are also vacuumed with a metal layer
  • These high-strength steels generally contain a high proportion of alloying elements such as silicon (Si), manganese (Mn) or aluminum (Al), sometimes also chromium (Cr) or phosphorus (P). Some of these special steels can also contain alloying elements such as silicon (Si), manganese (Mn) or aluminum (Al), sometimes also chromium (Cr) or phosphorus (P). Some of these special steels can also
  • alloying elements form surface oxides such as Si0 2 , Mn0 2 , MnSi0 3 , Mn 2 Si04, Al2O3, Cr 2 0 3 etc. during the heat treatment on the strip surface.
  • the oxide layer is very thin and is usually in the
  • Nanometer range 200 to 500 nm. These oxide layers are therefore compared to conventional scale layers
  • Strip surface very negatively on the coatability of the metal strips.
  • the metal oxides for example, significantly reduce the wettability for zinc, which can lead to problems with hot-dip galvanizing.
  • EP 1 829 983 B1 tries to solve the problem with a furnace with a non-oxidizing zone, an oxidizing zone and a reducing zone, the air / fuel ratio in the directly fired zone
  • this is annealed
  • a thin iron layer is applied electrolytically to the metal strip before the heat treatment (Fe flash layer). It has been shown that this iron layer reduces the formation of Mn, Al and Si oxides on the strip surface.
  • EP 2 956 296 B1 describes a method in which two separating layers are applied successively to the metal strip before the heat treatment, namely first a copper layer and then an iron layer. This
  • EP 2 631 319 A1 attempts the wetting problem in hot-dip galvanizing by adding a defined amount of aluminum to the zinc bath and by using precisely defined ones
  • the invention is therefore also based on the object of providing a method in which heat-treated metal strips, which preferably contain alloying elements such as Si, Mn, and Al, can be reliably coated; this is preferably a
  • Zinc layer or around an aluminum layer can be a zinc layer with a low aluminum content (Galfan), a zinc layer with a higher aluminum content (Galvalume) or a zinc layer with manganese or with Al / Si additives.
  • surface oxides on the metal strip are removed using at least one laser after the heat treatment and before the coating.
  • the thin oxide layer is evaporated by the laser beam or to flake off
  • the present invention is particularly suitable for
  • Future steel grades can also have silicon, manganese and aluminum contents of up to 5%. There are also special steels with a very high manganese content of 30 - 50%.
  • the coating is a passivation layer as corrosion protection. These passivation layers are often found on
  • Aluminum tapes or aluminum alloys applied they serve as corrosion protection, but also improve the liability of paints, adhesives and powder coatings.
  • Passivation can be removed with a laser.
  • the metal strip is preferably continuously heat-treated in an oven.
  • the furnace has a heating section and a subsequent cooling section and if the surface oxides in the cooling section are removed.
  • Cooling section two tape tension rollers, which for one
  • the laser treatment can preferably take place in the area of these tape tension rollers
  • metal strip is immersed and coated directly after the furnace in a metal bath, for example in a zinc bath (optionally with alloy additives such as aluminum).
  • the metal strip it is also conceivable for the metal strip to be coated in a coating system by depositing metal vapor (jet vapor deposition) or for it to be coated electrolytically.
  • the invention does not require that the metal strip immediately after the heat treatment
  • the metal strip can also be stored temporarily. It is only essential that
  • a surface cleaning is carried out with the aid of at least one laser, in order to remove the oxides formed on the surface during the heat treatment
  • the surface oxides on both sides of the strip are removed by the laser beam or beams.
  • the removed surface oxides are suctioned off immediately after they have been released.
  • the surface oxides can be in vapor form or as fine particles.
  • the belt speed is preferably measured and the intensity of the laser radiation corresponding to the
  • the degree of oxidation for example the thickness of the surface oxides, and the intensity of the laser radiation or the
  • Irradiation duration is regulated accordingly.
  • the entire strip surface can be measured continuously and the distribution of the oxides on the strip surface
  • the laser treatment then takes place
  • Embodiments of the method according to the invention in a hot-dip galvanizing line Embodiments of the method according to the invention in a hot-dip galvanizing line.
  • Figures 4 and 5 show two exemplary embodiments of a system in which the metal strip in a vacuum
  • Figure 1 shows a hot-dip galvanizing plant in the
  • Metal strip 1 first in an oven 2 continuously
  • the heat treatment in furnace 2 is heat treated and then coated in a coating system 3.
  • the heat treatment in furnace 2 is
  • the metal strip 1 is passed over various deflection rollers 10.
  • the heated section 9 of the furnace 2 can either be fired directly (DFF, direct fired furnace) or indirectly heated via radiant tubes (RTF, radiant tube furnace), induction heating is also conceivable. As a rule, several of these heating concepts are combined in one oven 2.
  • the metal strip 1 is cooled, for example, with hydrogen.
  • the necessary Belt tension in the furnace 2 is generated by the two belt tension rollers 6 at the end of the cooling section 8.
  • the metal strip 1 dips into the zinc bath 7 in a manner known per se via the trunk 11 and is galvanized there.
  • the lasers 5 are located in the area of the two strip tension rollers 6.
  • the laser beams are on the respective metal strip surface pointing away from the strip tension roller 6
  • the laser is arranged here directly in the areas in which the metal strip 1 over the
  • Metal band 1 very stable (it does not flutter), so the laser beam can be focused very precisely.
  • the lasers 5 can, for example, be one
  • Nd YAG, a CO2 or a diode laser.
  • the oxides formed during the heat treatment are removed by the lasers 5 and extracted by the suction 13. Depending on the laser power, the oxides are evaporated or they chip off the metal strip surface.
  • lasers 5 can be arranged alongside one another over the bandwidth, so that the entire bandwidth can be treated simultaneously. It is also possible for one or more laser beams to scan the strip surface in a cell-like manner (transverse to the strip running direction). The lasers 5 can also be arranged outside the furnace 2, the laser beams are then separated by special ones
  • the two belt surfaces are continuously scanned by scanner 12 and the surface areas on which the oxides are located are thus identified. It is conceivable that the oxides do not cover the entire surface of the metal strip surface.
  • the laser beams are then controlled so that only the areas covered with oxide are cleaned or treated.
  • Band surface is treated with the laser or lasers.
  • FIG. 2 shows a system similar to that of FIG. 1, only here the scanners 12, the lasers 5 and the suction 13 in the cooling section 8 are already arranged in front of the tape drawing rollers 6.
  • FIG. 4 shows a further system 4 for coating a metal strip 1.
  • the metal strip 1 first passes through a lock system 15 comprising a plurality of rollers 16.
  • the pressure is reduced step by step, since the coating is carried out in a vacuum or under negative pressure. Then a short warm-up takes place
  • Lock system 20 rebuilt. Immediately before the coating in the vacuum chamber 18, ie after the heating by the heating elements 17, the oxide is removed with the aid of lasers 5. In FIG. 4, the laser beams and the suction 13 are directed onto the deflection rollers 21.
  • the laser 5 and the suction 13 are located between the two deflection rollers 21.
  • the surface areas covered with oxide can be identified by a scanner 12 and the lasers 5 can be controlled accordingly.
  • Heat treatment can also take place in front of an electro-galvanic coating system (EGL).
  • ETL electro-galvanic coating system

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Thermal Sciences (AREA)
  • Electrochemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Coating With Molten Metal (AREA)
  • Physical Vapour Deposition (AREA)

Abstract

L'invention concerne un procédé pour le traitement d'une bande métallique (1). La bande métallique (1) est traitée thermiquement dans un four (2) et ensuite munie d'un revêtement dans une installation de revêtement (3). Selon l'invention, des oxydes de surface sur éliminés de la bande métallique (1) au moyen d'un laser (5), après le traitement thermique et avant l'application du revêtement.
PCT/EP2019/068251 2018-07-31 2019-07-08 Procédé pour l'amélioration de l'aptitude au revêtement d'une bande métallique WO2020025259A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50665/2018A AT520637B1 (de) 2018-07-31 2018-07-31 Verfahren zur verbesserung der beschichtbarkeit eines metallbandes
ATA50665/2018 2018-07-31

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WO2020025259A1 true WO2020025259A1 (fr) 2020-02-06

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022156921A1 (fr) * 2021-01-22 2022-07-28 Thyssenkrupp Steel Europe Ag Procédé de revêtement continu d'une bande et installation de revêtement
WO2022248089A1 (fr) * 2021-05-27 2022-12-01 Andritz Technology And Asset Management Gmbh Dispositif et procédé de traitement thermique d'une bande métallique
WO2023035800A1 (fr) * 2021-09-07 2023-03-16 高峰 Dispositif et procédé de traitement de surface de plaque d'acier

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Publication number Priority date Publication date Assignee Title
DE102021119426A1 (de) 2021-07-27 2023-02-02 Bayerische Motoren Werke Aktiengesellschaft Verfahren zur Herstellung eines pressgehärteten Blechformteils, damit hergestelltes pressgehärtetes Blechformteil und Anlage zur Herstellung pressgehärteter Blechformteile
CN114574818B (zh) * 2022-03-07 2023-04-25 浙江宇狮包装材料有限公司 一种采用真空蒸镀生产镀铝膜的设备
CN118241143B (zh) * 2024-05-27 2024-09-27 华菱安赛乐米塔尔汽车板有限公司 镀铝硅钢及制备方法、预涂镀钢、热成型构件的生产工艺

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US5948172A (en) * 1996-08-12 1999-09-07 Neiheisel; Gary L. Descaling metal with a laser having a very short pulse width and high average power
KR20030052753A (ko) * 2001-12-21 2003-06-27 주식회사 포스코 고강도 용융아연도금강판의 제조방법
EP1829983A1 (fr) 2004-12-21 2007-09-05 Kabushiki Kaisha Kobe Seiko Sho Procede et installation pour zingage par trempage a chaud
US20110104396A1 (en) * 2009-11-05 2011-05-05 The Trustees Of Columbia University In The City Of New York Substrate laser oxide removal process followed by electro or immersion plating
EP2631319A1 (fr) 2010-10-21 2013-08-28 Posco Tôle galvanisée présentant d'excellentes aptitudes au revêtement, adhérence de revêtement et aptitude au soudage par points, ainsi que son procédé de fabrication
US20130288073A1 (en) * 2010-12-27 2013-10-31 Posco Plating Method and Zinc Plating Process
EP2956296A1 (fr) 2013-02-12 2015-12-23 Tata Steel IJmuiden B.V. Acier revêtu approprié pour une galvanisation à chaud
WO2018096382A1 (fr) * 2016-11-23 2018-05-31 Aperam Procédé de décapage laser d'un produit métallique en défilement, et installation pour son exécution

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ZA9711591B (en) * 1996-08-12 1998-08-26 Armco Inc Descaling metal with a laser having a very short pulse width and high average power.
JPH11269683A (ja) * 1998-03-18 1999-10-05 Armco Inc 金属表面から酸化物を除去する方法及び装置

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US5948172A (en) * 1996-08-12 1999-09-07 Neiheisel; Gary L. Descaling metal with a laser having a very short pulse width and high average power
KR20030052753A (ko) * 2001-12-21 2003-06-27 주식회사 포스코 고강도 용융아연도금강판의 제조방법
EP1829983A1 (fr) 2004-12-21 2007-09-05 Kabushiki Kaisha Kobe Seiko Sho Procede et installation pour zingage par trempage a chaud
US20110104396A1 (en) * 2009-11-05 2011-05-05 The Trustees Of Columbia University In The City Of New York Substrate laser oxide removal process followed by electro or immersion plating
EP2631319A1 (fr) 2010-10-21 2013-08-28 Posco Tôle galvanisée présentant d'excellentes aptitudes au revêtement, adhérence de revêtement et aptitude au soudage par points, ainsi que son procédé de fabrication
US20130288073A1 (en) * 2010-12-27 2013-10-31 Posco Plating Method and Zinc Plating Process
EP2956296A1 (fr) 2013-02-12 2015-12-23 Tata Steel IJmuiden B.V. Acier revêtu approprié pour une galvanisation à chaud
WO2018096382A1 (fr) * 2016-11-23 2018-05-31 Aperam Procédé de décapage laser d'un produit métallique en défilement, et installation pour son exécution

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022156921A1 (fr) * 2021-01-22 2022-07-28 Thyssenkrupp Steel Europe Ag Procédé de revêtement continu d'une bande et installation de revêtement
WO2022248089A1 (fr) * 2021-05-27 2022-12-01 Andritz Technology And Asset Management Gmbh Dispositif et procédé de traitement thermique d'une bande métallique
WO2023035800A1 (fr) * 2021-09-07 2023-03-16 高峰 Dispositif et procédé de traitement de surface de plaque d'acier

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