TW202014533A - Method for improving the suitability of a metal strip for coating - Google Patents

Method for improving the suitability of a metal strip for coating Download PDF

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Publication number
TW202014533A
TW202014533A TW108125797A TW108125797A TW202014533A TW 202014533 A TW202014533 A TW 202014533A TW 108125797 A TW108125797 A TW 108125797A TW 108125797 A TW108125797 A TW 108125797A TW 202014533 A TW202014533 A TW 202014533A
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TW
Taiwan
Prior art keywords
metal strip
strip
coating
laser
furnace
Prior art date
Application number
TW108125797A
Other languages
Chinese (zh)
Inventor
托馬斯 拉夫里奇
漢內斯 桑特
Original Assignee
奧地利商安德里茲股份公司
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Application filed by 奧地利商安德里茲股份公司 filed Critical 奧地利商安德里茲股份公司
Publication of TW202014533A publication Critical patent/TW202014533A/en

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    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/02Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B08B7/0035Cleaning 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
    • B08B7/0042Cleaning 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/03Observing, e.g. monitoring, the workpiece
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/0604Shaping the laser beam, e.g. by masks or multi-focusing by a combination of beams
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/0604Shaping the laser beam, e.g. by masks or multi-focusing by a combination of beams
    • B23K26/0619Shaping the laser beam, e.g. by masks or multi-focusing by a combination of beams with spots located on opposed surfaces of the workpiece
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/067Dividing the beam into multiple beams, e.g. multifocusing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/352Working by laser beam, e.g. welding, cutting or boring for surface treatment
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/82Descaling by thermal stresses
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C14/00Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/02Pretreatment of the material to be coated
    • C23C14/021Cleaning or etching treatments
    • C23C14/022Cleaning or etching treatments by means of bombardment with energetic particles or radiation
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    • C23COATING 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
    • C23CCOATING 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
    • C23C14/00Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/06Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
    • C23C14/14Metallic material, boron or silicon
    • C23C14/16Metallic material, boron or silicon on metallic substrates or on substrates of boron or silicon
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C14/00Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/22Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
    • C23C14/228Gas flow assisted PVD deposition
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    • C23COATING 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
    • C23CCOATING 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
    • C23C14/00Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/22Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
    • C23C14/24Vacuum evaporation
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    • C23COATING 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
    • C23CCOATING 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
    • C23C14/00Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/22Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
    • C23C14/56Apparatus specially adapted for continuous coating; Arrangements for maintaining the vacuum, e.g. vacuum locks
    • C23C14/562Apparatus specially adapted for continuous coating; Arrangements for maintaining the vacuum, e.g. vacuum locks for coating elongated substrates
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/003Apparatus
    • C23C2/0035Means for continuously moving substrate through, into or out of the bath
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/003Apparatus
    • C23C2/0038Apparatus characterised by the pre-treatment chambers located immediately upstream of the bath or occurring locally before the dipping process
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/003Apparatus
    • C23C2/0038Apparatus characterised by the pre-treatment chambers located immediately upstream of the bath or occurring locally before the dipping process
    • C23C2/004Snouts
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    • C23COATING 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
    • C23CCOATING 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
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/02Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C23C2/022Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
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    • C23COATING 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
    • C23CCOATING 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
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/02Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C23C2/022Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
    • C23C2/0222Pretreatment 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
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    • C23COATING 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
    • C23CCOATING 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
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/02Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C23C2/022Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
    • C23C2/0224Two or more thermal pretreatments
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    • C23COATING 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
    • C23CCOATING 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
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/02Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C23C2/024Pretreatment of the material to be coated, e.g. for coating on selected surface areas by cleaning or etching
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/06Zinc or cadmium or alloys based thereon
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    • C23COATING 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
    • C23CCOATING 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
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/12Aluminium or alloys based thereon
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    • C23COATING 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
    • C23CCOATING 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
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/34Hot-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
    • C23C2/36Elongated material
    • C23C2/40Plates; Strips
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/34Pretreatment of metallic surfaces to be electroplated
    • C25D5/36Pretreatment of metallic surfaces to be electroplated of iron or steel
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    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/34Pretreatment of metallic surfaces to be electroplated
    • C25D5/42Pretreatment of metallic surfaces to be electroplated of light metals
    • C25D5/44Aluminium
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    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D7/00Electroplating characterised by the article coated
    • C25D7/06Wires; Strips; Foils
    • C25D7/0614Strips or foils
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B15/00Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
    • B08B15/04Preventing 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00Articles made by soldering, welding or cutting
    • B23K2101/16Bands or sheets of indefinite length
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00Materials to be soldered, welded or cut
    • B23K2103/02Iron or ferrous alloys
    • B23K2103/04Steel or steel alloys
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00Materials to be soldered, welded or cut
    • B23K2103/08Non-ferrous metals or alloys
    • B23K2103/10Aluminium or alloys thereof
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54Furnaces for treating strips or wire
    • C21D9/56Continuous furnaces for strip or wire
    • C21D9/573Continuous furnaces for strip or wire with cooling
    • C21D9/5735Details
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22FCHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon

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Abstract

The object of the present invention is a method for treating a metal strip (1). With this method, the metal strip (1) is heat-treated in a furnace (2) and then coated in a coating plant (3). According to the invention, surface oxides on the metal strip (1) are removed with the aid of a laser (5) after heat treatment and before coating.

Description

改良用於塗覆之金屬條適合性之方法Method for improving suitability of metal strip used for coating

本發明之目標係處理金屬條之方法。利用此方法,將金屬條在爐中熱處理且然後在塗覆設備中塗覆。The object of the invention is a method of processing metal strips. With this method, the metal strip is heat-treated in a furnace and then coated in a coating device.

高強度鋼等級(例如雙相鋼(DP鋼)、多相鋼複相鋼(CP鋼)、AHSS (先進高強度鋼)或UHSS (超高強度鋼))將高強度與最佳化成型能力相結合。該等鋼主要以金屬薄板之形式用於汽車製造中。其使得可減輕重量,並在不同的結構加固件及碰撞組件中提供更多設計自由度。High-strength steel grades (e.g. dual-phase steel (DP steel), multi-phase steel complex steel (CP steel), AHSS (advanced high-strength steel) or UHSS (ultra-high-strength steel)) optimize high-strength and formability Combine. These steels are mainly used in automobile manufacturing in the form of metal sheets. It makes it possible to reduce weight and provide more design freedom in different structural reinforcements and collision components.

具有由鐵磁體(軟)基質組成之結構的所有鋼均稱為雙相鋼(DP鋼),其中主要馬氏體(強化)第二相嵌入晶粒邊界處之島構形中。此結構具有相對較低屈服點(此有利於成型製程)及高抗拉強度。該等性質對於複雜、深拉伸組件而言係優點。All steels having a structure composed of a ferromagnetic (soft) matrix are called dual-phase steels (DP steels), in which the main martensite (strengthened) second phase is embedded in the island configuration at the grain boundaries. This structure has a relatively low yield point (which is beneficial to the molding process) and high tensile strength. These properties are advantages for complex, deep-drawn components.

先進高強度鋼係冷彎型鋼中現代高強度鋼等級之統稱。其在行業中亦稱為碳鋼、C-鋼及AHS鋼。Advanced high-strength steel is a general term for modern high-strength steel grades in cold-formed steel. It is also known as carbon steel, C-steel and AHS steel in the industry.

該等高強度鋼經塗覆以提供足夠保護免於腐蝕。舉例而言,其係在熔融金屬浴中經鋅或鋅合金之層塗覆。在更現代之方法中,亦在真空下(噴射氣相沈積-JVD)將金屬蒸氣層施加至此條。塗覆之前,通常經冷軋之該等鋼較佳在退火爐中經歷熱處理,以改變其結構。These high-strength steels are coated to provide sufficient protection from corrosion. For example, it is coated with a layer of zinc or zinc alloy in a molten metal bath. In a more modern method, a metal vapor layer is also applied to this strip under vacuum (jet vapor deposition-JVD). Prior to coating, the steels, which are usually cold rolled, are preferably subjected to heat treatment in an annealing furnace to change their structure.

通常,該等高強度鋼含有高比例之合金元素,例如矽(Si)、錳(Mn)或鋁(Al),及在一些情形中以及鉻(Cr)或磷(P)。一些該等特種鋼亦可含有鉬(Mo)、鈮(Nb)、鈦(Ti)或硼(B)。Generally, these high-strength steels contain a high proportion of alloying elements, such as silicon (Si), manganese (Mn) or aluminum (Al), and in some cases, chromium (Cr) or phosphorus (P). Some of these special steels may also contain molybdenum (Mo), niobium (Nb), titanium (Ti) or boron (B).

該等合金元素在熱處理期間在該條之表面上產生表面氧化物,例如SiO2 、MnO2 、MnSiO3 、Mn2 SiO4 、Al2 O3 、Cr2 O3 等。此氧化物層極薄,通常在奈米範圍內(200至500 nm)。因此,該等氧化物層遠比與範圍在7與10 µm之間之習用尺度之層(氧化鐵)薄。These alloy elements produce surface oxides on the surface of the strip during the heat treatment, for example, SiO 2 , MnO 2 , MnSiO 3 , Mn 2 SiO 4 , Al 2 O 3 , Cr 2 O 3 and so on. This oxide layer is extremely thin, usually in the nanometer range (200 to 500 nm). Therefore, these oxide layers are much thinner than conventional-scale layers (iron oxide) between 7 and 10 µm.

然而,條表面上之該等金屬氧化物對用於塗覆之金屬條適合性具有極為不利的效應。舉例而言,金屬氧化物實質上降低鋅之潤濕性,其結果係在熱鍍鋅期間可產生若干問題。However, these metal oxides on the surface of the strip have a very adverse effect on the suitability of the metal strip used for coating. For example, metal oxides substantially reduce the wettability of zinc, with the result that several problems can occur during hot dip galvanizing.

現有技術提供若干途徑以防止在條表面上形成該等金屬氧化物,例如退火爐中強還原氛圍。然而,甚至極少量之氧及水亦分別導致該等氧化物形成。The prior art provides several ways to prevent the formation of such metal oxides on the surface of the strip, such as a strong reducing atmosphere in an annealing furnace. However, even very small amounts of oxygen and water cause the formation of these oxides, respectively.

EP 1 829 983 B1試圖利用具有非氧化區、氧化區及還原區之爐解決該問題,其中直接燃燒區中之空氣對燃料比率必須符合某些規格。EP 1 829 983 B1 attempts to solve this problem by using a furnace with a non-oxidation zone, an oxidation zone and a reduction zone, where the air-to-fuel ratio in the direct combustion zone must meet certain specifications.

在另一途徑中,使退火金屬條經酸洗,其結果係藉由酸去除合金元素中之氧化物。然而,金屬條之後必須再次加熱以達到鋅浴之合適溫度。因此,此方法複雜且昂貴,且合金元素中之氧化物通常亦較氧化鐵更難以去除。In another approach, the annealed metal strip is pickled, with the result that the oxides in the alloying elements are removed by acid. However, the metal strip must then be heated again to reach the proper temperature of the zinc bath. Therefore, this method is complicated and expensive, and oxides in alloying elements are generally more difficult to remove than iron oxide.

在另一途徑中,在熱處理金屬條之前將鐵薄層(Fe快速層)以電解方式施加至其。已顯示,所施加之此鐵層減少條表面上錳、鋁及矽氧化物之形成。然而,對於所有高強度鋼,此並不能令人滿意地起作用。亦已知,可以電解方式施加鎳薄層(鎳快速層),其然後至少部分地充當合金元素之擴散障壁。In another approach, a thin layer of iron (Fe rapid layer) is applied to it electrolytically before the metal strip is heat treated. It has been shown that this applied iron layer reduces the formation of manganese, aluminum and silicon oxide on the surface of the strip. However, for all high-strength steels, this does not work satisfactorily. It is also known that a thin layer of nickel (nickel rapid layer) can be applied electrolytically, which then at least partially serves as a diffusion barrier for alloying elements.

EP 2 956 296 B1闡述在熱處理之前將兩個單獨層相繼施加至金屬條之方法,第一層係銅層且第二層係鐵層。然而,此方法極為複雜。EP 2 956 296 B1 describes a method of applying two separate layers to the metal strip one after another before heat treatment, the first layer is a copper layer and the second layer is an iron layer. However, this method is extremely complicated.

EP 2 631 319 A1嘗試藉由將規定量之鋁添加至熔融鋅浴中並界定精確之溫度範圍來解決熱鍍鋅中之潤濕問題。EP 2 631 319 A1 attempts to solve the wetting problem in hot dip galvanizing by adding a specified amount of aluminum to the molten zinc bath and defining a precise temperature range.

因此,本發明亦基於提供方法之任務,利用該方法,較佳含有合金元素(例如Si、Mn及Al)之經熱處理金屬條可較佳利用金屬塗層(例如鋅或鋁層)可靠地塗覆。此可為具有低鋁含量之鋅層(Galfan)、具有高鋁含量之鋅層(Galvalume)或甚至添加有錳或Al/Si之鋅層。Therefore, the present invention is also based on the task of providing a method by which a heat-treated metal strip preferably containing alloying elements (such as Si, Mn, and Al) can be reliably coated with a metal coating (such as a zinc or aluminum layer) cover. This may be a zinc layer with a low aluminum content (Galfan), a zinc layer with a high aluminum content (Galvalume), or even a zinc layer added with manganese or Al/Si.

此目標係藉助如技術方案1之方法實現。This goal is achieved by a method such as technical solution 1.

根據本發明,在熱處理之後且在塗覆之前借助至少一個雷射去除金屬條上之表面氧化物。雷射束使得薄氧化物層蒸發或剝落。因此,後續塗覆容易進行。According to the invention, the surface oxide on the metal strip is removed by means of at least one laser after heat treatment and before coating. The laser beam causes the thin oxide layer to evaporate or flake off. Therefore, subsequent coating is easy.

本發明尤其適用於處理含有諸如矽、錳或鋁之元素的冷軋、熱處理、高強度鋼條,該等元素在熱處理期間在表面上擴散並由於爐氛圍中之殘餘氧含量而在此處形成各種氧化物。該等氧化物之後極難或幾乎不可能在正常還原性氛圍中去除。The invention is particularly suitable for processing cold-rolled, heat-treated, high-strength steel bars containing elements such as silicon, manganese, or aluminum, which diffuse on the surface during heat treatment and form here due to residual oxygen content in the furnace atmosphere Various oxides. These oxides are extremely difficult or almost impossible to remove in a normal reducing atmosphere afterwards.

由於表面氧化物而特別受塗覆問題影響之目前金屬條含有以下合金元素: Si:0.5-2.5% Mn:0.5-2.5% Al:0.5-1.5% Cr:0.2- < 1% Mo:< 1%The current metal strips, which are particularly affected by coating problems due to surface oxides, contain the following alloy elements: Si: 0.5-2.5% Mn: 0.5-2.5% Al: 0.5-1.5% Cr: 0.2- <1% Mo: <1%

然而,未來的鋼等級亦可含有高達5%矽、錳及鋁。亦存在具有30-50%之極高錳含量的特種鋼。However, future steel grades may also contain up to 5% silicon, manganese and aluminum. There are also special steels with an extremely high manganese content of 30-50%.

塗層亦可為鈍化層作為腐蝕保護。該等鈍化層經常地施加至鋁條或鋁合金。其不僅起到腐蝕保護,亦改良清漆、膠及粉末塗層之黏著能力。舉例而言,表面氧化物可在熱處理之後及鈍化之前利用雷射束自鋁條去除。The coating can also be a passivation layer for corrosion protection. Such passivation layers are often applied to aluminum strips or aluminum alloys. It not only provides corrosion protection, but also improves the adhesion of varnishes, glues and powder coatings. For example, the surface oxide can be removed from the aluminum strip using a laser beam after heat treatment and before passivation.

金屬條較佳在爐中連續熱處理。The metal strip is preferably continuously heat-treated in a furnace.

在此情形中,爐具有加熱區段、隨後冷卻區段且在冷卻區段中去除表面氧化物係有利的。In this case, it is advantageous for the furnace to have a heating section, a subsequent cooling section, and to remove surface oxides in the cooling section.

連續操作爐通常在冷卻區段末端具有兩個條張力輥以確保在爐中之適當條張力。雷射處理較佳可在該等條張力輥之區域中、理想地在兩側進行,此乃因條運行在此處極為穩定。Continuously operating furnaces usually have two strip tension rollers at the end of the cooling section to ensure proper strip tension in the furnace. The laser treatment is preferably carried out in the area of the tension rollers, ideally on both sides, because the strip operation is extremely stable here.

金屬條在離開爐之後直接浸於熔融金屬浴(例如熔融鋅浴)(若需要,含有諸如鋁之合金添加劑)中並在此處塗覆係一優點。After leaving the furnace, the metal strip is directly immersed in a molten metal bath (for example, a molten zinc bath) (containing alloy additives such as aluminum if necessary) and coated there is an advantage.

然而,亦可在塗覆設備中藉助噴射氣相沈積塗覆金屬條或以電解方式塗覆。本發明不要求金屬條在熱處理之後立即塗覆。金屬條亦可暫時儲存。重要的是在熱處理製程與塗覆製程之間借助至少一個雷射清潔表面,以去除在熱處理期間金屬條表面上形成之氧化物。However, it is also possible to coat the metal strip by spraying vapor deposition in the coating equipment or to coat it electrolytically. The invention does not require the metal strip to be coated immediately after heat treatment. Metal bars can also be stored temporarily. It is important to clean the surface with at least one laser between the heat treatment process and the coating process to remove oxides formed on the surface of the metal strip during the heat treatment.

理想地,藉由一或多個雷射束去除條兩側之表面氧化物。Ideally, the surface oxide on both sides of the strip is removed by one or more laser beams.

有利的是,之後立即藉由抽吸去除所分離的表面氧化物。在此情形中,表面氧化物可以蒸氣或細粒之形式存在。Advantageously, the separated surface oxide is removed by suction immediately afterwards. In this case, the surface oxide may exist in the form of vapor or fine particles.

可預計,氧化物不會覆蓋金屬條之整個表面,而是僅作為例如斑點存在於斑塊中。就此而言,利用掃描儀檢查金屬表面以檢測經氧化物覆蓋之區域係有用的。然後僅在該等區域中實施雷射處理。It can be expected that the oxide does not cover the entire surface of the metal strip, but only exists in the plaque as, for example, spots. In this regard, it is useful to use a scanner to inspect the metal surface to detect areas covered by oxides. Then implement laser processing only in these areas.

條速度較佳經量測並根據條速度控制雷射束之強度。The strip speed is preferably measured and the intensity of the laser beam is controlled according to the strip speed.

測定氧化程度(例如表面氧化物之厚度)並相應地控制雷射束之強度或暴露之持續時間亦係可行的。此處,可連續量測整個條表面,亦可量測條表面上之氧化物分佈。然後根據表面氧化物之此分佈或厚度實施雷射處理。具有增加之表面氧化物的區域暴露相應較長時間,或增加該等區域之雷射暴露強度。It is also feasible to determine the degree of oxidation (eg the thickness of the surface oxide) and control the intensity of the laser beam or the duration of exposure accordingly. Here, the entire strip surface can be continuously measured, and the oxide distribution on the strip surface can also be measured. Then laser treatment is performed according to this distribution or thickness of surface oxide. Areas with increased surface oxides are exposed for a relatively long time, or the laser exposure intensity of these areas is increased.

在下文中,基於附圖描述本發明之若干可能實施例。In the following, several possible embodiments of the invention are described based on the drawings.

圖1至3顯示在熱鍍鋅線中根據本發明之方法的三個可能實施例。Figures 1 to 3 show three possible embodiments of the method according to the invention in a hot-dip galvanizing line.

圖4及5顯示其中在真空下利用金屬蒸氣塗覆金屬條之設備的兩個可能實施例。Figures 4 and 5 show two possible embodiments of devices in which metal strips are coated with metal vapor under vacuum.

在圖中相同參考數字在每一情形中指示相同的設備組件。The same reference numbers in the figures indicate the same equipment components in each case.

圖1顯示熱鍍鋅設備,其中金屬條1首先在爐2中經歷連續熱處理並然後在塗覆設備3中塗覆。爐2中之熱處理係必需的,以藉由退火再次軟化在先前冷軋階段軋製的金屬條1並在其中藉助適當退火及冷卻循環界定金屬條1之期望性能。金屬條1穿過爐,運行經過各個偏轉輥10。FIG. 1 shows a hot-dip galvanizing apparatus in which the metal strip 1 is first subjected to continuous heat treatment in a furnace 2 and then coated in a coating apparatus 3. The heat treatment in the furnace 2 is necessary to soften again the metal strip 1 rolled in the previous cold rolling stage by annealing and define therein the desired properties of the metal strip 1 by means of appropriate annealing and cooling cycles. The metal strip 1 passes through the furnace and travels through the deflection rollers 10.

爐2之加熱區段9可直接(DFF - 直接燃燒爐)或藉由輻射管(RTF - 輻射管爐)間接燃燒;感應加熱亦係可能的。通常,爐2具有若干該等加熱系統之組合。The heating section 9 of the furnace 2 can be directly burned (DFF-direct combustion furnace) or indirectly by means of a radiant tube (RTF-radiant tube furnace); induction heating is also possible. Generally, the furnace 2 has a combination of several such heating systems.

在爐2之冷卻區段8中,金屬條1利用(例如)氫冷卻。爐2中之所需條張力係藉由冷卻區段8末端之兩個條張力輥6產生。當金屬條1離開爐2時,將其以自身已知之方式經由噴口11浸於熔融鋅浴7中並在其中鍍鋅。In the cooling section 8 of the furnace 2, the metal strip 1 is cooled with, for example, hydrogen. The required strip tension in the furnace 2 is generated by the two strip tension rollers 6 at the end of the cooling section 8. When the metal strip 1 leaves the furnace 2, it is immersed in the molten zinc bath 7 via the nozzle 11 in a manner known per se and is galvanized therein.

雷射5位於兩個條張力輥6處。在此情形中,引導雷射束朝向面向遠離條張力輥6之各別條金屬表面。此處,雷射直接設置於其中金屬條1運行經過條張力輥6之彼等區域中。在該等區域中,金屬條1極為穩定(其不會振盪),由此雷射束可以極高精密度聚焦。The laser 5 is located at two tension rollers 6. In this case, the laser beam is directed towards the respective strip metal surface facing away from the strip tension roller 6. Here, the laser is directly arranged in the areas where the metal strip 1 travels past the strip tension roller 6. In these areas, the metal strip 1 is extremely stable (it does not oscillate), whereby the laser beam can be focused with extremely high precision.

雷射5可為例如Nd:YAG、CO2 或二極體雷射。The laser 5 may be, for example, Nd:YAG, CO 2 or diode laser.

雷射5去除在熱處理期間形成之氧化物並藉由抽吸使用抽吸裝置13去除。端視雷射輸出而定,氧化物自金屬條之表面蒸發或剝落。The laser 5 removes oxides formed during the heat treatment and is removed by suction using a suction device 13. Depending on the laser output, the oxide evaporates or flakes off the surface of the metal strip.

若干雷射5可在條之寬度上彼此相鄰配置,以使得可同時處理整個條寬度。亦可在條表面上逐列地(與條運行方向成直角)運行一或多個雷射束。雷射5亦可配置在爐2外部。然後可藉由專用光導體或專用玻璃窗將雷射引導至爐中。Several lasers 5 can be arranged adjacent to each other across the width of the strip so that the entire strip width can be processed simultaneously. One or more laser beams can also be run on the surface of the strip row by column (at right angles to the direction of travel of the strip). The laser 5 can also be arranged outside the furnace 2. The laser can then be guided into the furnace by a dedicated photoconductor or a dedicated glass window.

藉由掃描儀12連續檢查兩個條表面,以檢測經氧化物塗覆之表面區域。氧化物亦可能未覆蓋金屬條之整個表面。然後以僅清潔或處理經氧化物覆蓋之區域的方式控制雷射束。The two strip surfaces are continuously inspected by the scanner 12 to detect the oxide-coated surface area. The oxide may not cover the entire surface of the metal strip. The laser beam is then controlled in such a way that only areas covered by oxides are cleaned or treated.

當然,亦可利用一或多個雷射處理整個條表面。Of course, one or more lasers can also be used to treat the entire strip surface.

圖2顯示類似於圖1之設備,只是此處掃描儀12、雷射5及抽吸裝置13位於條張力輥6之前的冷卻區段8。FIG. 2 shows a device similar to FIG. 1, except that the scanner 12, the laser 5 and the suction device 13 are located in the cooling section 8 before the strip tension roller 6.

在圖3中,掃描儀12、雷射5及抽吸裝置13位於塗覆設備3之噴口11中。In FIG. 3, the scanner 12, the laser 5 and the suction device 13 are located in the nozzle 11 of the coating apparatus 3.

圖4顯示用於塗覆金屬條1之另一設備4。熱處理14之後,金屬條1首先穿過由若干輥16形成之鎖系統15。降低此階段之壓力,此乃因塗覆係在真空或部分真空下實施。然後藉由加熱元件17將條短暫地加熱,然後將其在真空室18中塗覆。在塗覆製程期間,霧狀鋅藉助噴嘴19沈積於金屬條1上。該塗覆方法在實務界稱為「噴射氣相沈積」。FIG. 4 shows another device 4 for coating metal strips 1. After the heat treatment 14, the metal strip 1 first passes through a lock system 15 formed by rollers 16. The pressure at this stage is reduced because the coating is carried out under vacuum or partial vacuum. The strip is then briefly heated by the heating element 17 and then coated in the vacuum chamber 18. During the coating process, mist-like zinc is deposited on the metal strip 1 by means of the nozzle 19. This coating method is called "jet vapor deposition" in practice.

然後經由第二鎖系統20再次構建壓力。The pressure is then built up again via the second lock system 20.

在即將在真空室18中塗覆之前,即在藉由加熱元件17加熱之後,借助雷射5去除氧化物。在圖4中,雷射束及抽吸裝置13經引導朝向偏轉輥21。Immediately before coating in the vacuum chamber 18, that is, after heating by the heating element 17, the oxide 5 is removed by the laser 5. In FIG. 4, the laser beam and suction device 13 are guided toward the deflection roller 21.

在圖5中,雷射5及抽吸裝置13位於兩個偏轉輥21之間。In FIG. 5, the laser 5 and the suction device 13 are located between the two deflection rollers 21.

此處經氧化物覆蓋之表面區域亦可藉助掃描儀12進行檢測且因此雷射5可經引導。Here, the surface area covered by the oxide can also be detected by the scanner 12 and therefore the laser 5 can be guided.

在熱處理之後的根據本發明之雷射清潔裝置亦可在電鍍鋅線(EGL)之前使用。The laser cleaning device according to the present invention after the heat treatment can also be used before the electrogalvanized wire (EGL).

1:金屬條 2:爐 3:塗覆設備 4:設備/JVD塗覆設備 5:雷射 6:條張力輥 7:熔融鋅浴 8:冷卻區段 9:加熱區段 10:偏轉輥 11:噴口 12:掃描儀 13:抽吸裝置 14:熱處理 15:鎖系統 16:輥 17:加熱元件 18:真空室 19:噴嘴 20:第二鎖系統 21:偏轉輥1: metal strip 2: furnace 3: coating equipment 4: Equipment/JVD coating equipment 5: Laser 6: Strip tension roller 7: molten zinc bath 8: Cooling section 9: Heating section 10: deflection roller 11: spout 12: Scanner 13: Suction device 14: Heat treatment 15: Lock system 16: Roller 17: Heating element 18: vacuum chamber 19: Nozzle 20: Second lock system 21: deflection roller

在下文中,基於附圖描述本發明之若干可能實施例。 圖1至3顯示在熱鍍鋅線中根據本發明之方法的三個可能實施例。 圖4及5顯示其中在真空下利用金屬蒸氣塗覆金屬條之設備的兩個可能實施例。 在圖中相同參考數字在每一情形中指示相同的設備組件。In the following, several possible embodiments of the invention are described based on the drawings. Figures 1 to 3 show three possible embodiments of the method according to the invention in a hot-dip galvanizing line. Figures 4 and 5 show two possible embodiments of devices in which metal strips are coated with metal vapor under vacuum. The same reference numbers in the figures indicate the same equipment components in each case.

1:金屬條 1: metal strip

2:爐 2: furnace

3:塗覆設備 3: coating equipment

5:雷射 5: Laser

6:條張力輥 6: Strip tension roller

7:熔融鋅浴 7: molten zinc bath

8:冷卻區段 8: Cooling section

9:加熱區段 9: Heating section

10:偏轉輥 10: deflection roller

11:噴口 11: spout

12:掃描儀 12: Scanner

13:抽吸裝置 13: Suction device

Claims (14)

一種處理金屬條(1)之方法,其中該金屬條(1)在爐(2)中經熱處理並隨後在塗覆設備(3, 4)中塗覆,其特徵在於 在熱處理之後且在塗覆之前借助至少一個雷射(5)去除該金屬條(1)上之表面氧化物。A method for processing a metal strip (1), wherein the metal strip (1) is heat-treated in a furnace (2) and then coated in a coating device (3, 4), characterized in that it is after heat treatment and before coating The surface oxide on the metal strip (1) is removed by means of at least one laser (5). 如請求項1之方法,其中 在該塗覆設備(3, 4)中利用金屬塗層塗覆該金屬條(1)。The method according to claim 1, wherein the metal strip (1) is coated with a metal coating in the coating equipment (3, 4). 如請求項1或2之方法,其中 在爐(2)中連續熱處理該金屬條(1)。The method according to claim 1 or 2, wherein the metal strip (1) is continuously heat-treated in a furnace (2). 如請求項3之方法,其中 該爐(2)具有加熱區段(9)、隨後冷卻區段(8)且其中該等表面氧化物係在該冷卻區段(8)中去除。The method of claim 3, wherein the furnace (2) has a heating section (9), followed by a cooling section (8) and wherein the surface oxides are removed in the cooling section (8). 如請求項3之方法,其中 該金屬條(1)在離開該爐(2)後立即浸於熔融金屬浴(7)中並在其中塗覆。The method of claim 3, wherein the metal strip (1) is immersed in the molten metal bath (7) and coated therein immediately after leaving the furnace (2). 如請求項5之方法,其中 該金屬條(1)在該熔融金屬浴(7)中進行鍍鋅。The method of claim 5, wherein the metal strip (1) is galvanized in the molten metal bath (7). 如請求項1或2之方法,其中 在該塗覆設備(4)中藉由噴射氣相沈積塗覆該金屬條(1)。The method according to claim 1 or 2, wherein the metal strip (1) is coated by spray vapor deposition in the coating apparatus (4). 如請求項1或2之方法,其中 在該塗覆設備中以電解方式塗覆該金屬條(1)。The method according to claim 1 or 2, wherein the metal strip (1) is coated electrolytically in the coating apparatus. 如請求項1或2之方法,其中 藉助雷射(5)去除該條之兩側上之該等表面氧化物。A method as claimed in item 1 or 2, wherein the surface oxides on both sides of the strip are removed by means of laser (5). 如請求項1或2之方法,其中 藉由抽吸去除該等表面氧化物。The method according to claim 1 or 2, wherein the surface oxides are removed by suction. 如請求項1或2之方法,其中 藉由掃描儀(12)掃描該金屬條之表面以鑑別存在表面氧化物之區域,使得僅該等區域經該雷射(5)處理。The method of claim 1 or 2, wherein the surface of the metal strip is scanned by a scanner (12) to identify areas where surface oxides are present, so that only those areas are processed by the laser (5). 如請求項1或2之方法,其中 量測條速度並根據該條速度控制該雷射束之強度。The method of claim 1 or 2, wherein the speed of the bar is measured and the intensity of the laser beam is controlled according to the bar speed. 如請求項1或2之方法,其中 測定該金屬條之表面上之氧化程度並相應地控制該雷射束之強度或暴露之持續時間。A method as claimed in claim 1 or 2, wherein the degree of oxidation on the surface of the metal strip is determined and the intensity of the laser beam or the duration of exposure is controlled accordingly. 如請求項1或2之方法,其中 利用此方法可處理亦含有Si、Mn及Al作為合金元素之金屬條(1)。The method according to claim 1 or 2, wherein the metal strip (1) which also contains Si, Mn and Al as alloying elements can be processed by this method.
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