WO2009147309A1 - Procede de fabrication d'une bande metallique revetue presentant un aspect ameliore - Google Patents

Procede de fabrication d'une bande metallique revetue presentant un aspect ameliore Download PDF

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Publication number
WO2009147309A1
WO2009147309A1 PCT/FR2009/000560 FR2009000560W WO2009147309A1 WO 2009147309 A1 WO2009147309 A1 WO 2009147309A1 FR 2009000560 W FR2009000560 W FR 2009000560W WO 2009147309 A1 WO2009147309 A1 WO 2009147309A1
Authority
WO
WIPO (PCT)
Prior art keywords
metal strip
coating
metal
solidification
strip
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/FR2009/000560
Other languages
English (en)
French (fr)
Inventor
Luc Diez
Jean-Michel Mataigne
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ArcelorMittal Investigacion y Desarrollo SL
Original Assignee
ArcelorMittal Investigacion y Desarrollo SL
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=39810192&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2009147309(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority to AT09757685T priority Critical patent/ATE551436T1/de
Priority to BRPI0910310-4A priority patent/BRPI0910310B1/pt
Priority to US12/919,097 priority patent/US9914992B2/en
Application filed by ArcelorMittal Investigacion y Desarrollo SL filed Critical ArcelorMittal Investigacion y Desarrollo SL
Priority to ES09757685T priority patent/ES2385287T3/es
Priority to PL09757685T priority patent/PL2297372T3/pl
Priority to MX2010008776A priority patent/MX2010008776A/es
Priority to EP09757685A priority patent/EP2297372B1/fr
Priority to JP2011508972A priority patent/JP5677289B2/ja
Priority to KR1020107019363A priority patent/KR101259595B1/ko
Priority to CA2714220A priority patent/CA2714220C/fr
Priority to CN2009801070225A priority patent/CN101981219B/zh
Priority to UAA201010560A priority patent/UA107326C2/ru
Publication of WO2009147309A1 publication Critical patent/WO2009147309A1/fr
Priority to ZA2010/05488A priority patent/ZA201005488B/en
Priority to MA33148A priority patent/MA32143B1/fr
Anticipated expiration legal-status Critical
Priority to US15/703,930 priority patent/US10550458B2/en
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
    • B32B15/012—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of an iron alloy or steel, another layer being formed of aluminium or an aluminium alloy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/18—Layered products comprising a layer of metal comprising iron or steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
    • C23C2/16—Removing excess of molten coatings; Controlling or regulating the coating thickness using fluids under pressure, e.g. air knives
    • C23C2/18—Removing excess of molten coatings from elongated material
    • C23C2/20—Strips; Plates
    • 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
    • C23C2/26—After-treatment
    • C23C2/28—Thermal after-treatment, e.g. treatment in oil bath
    • C23C2/29—Cooling or quenching
    • 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
    • C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
    • 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
    • C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
    • C23C30/005—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process on hard metal substrates
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12229—Intermediate article [e.g., blank, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/1241—Nonplanar uniform thickness or nonlinear uniform diameter [e.g., L-shape]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12785—Group IIB metal-base component
    • Y10T428/12792—Zn-base component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12785—Group IIB metal-base component
    • Y10T428/12792—Zn-base component
    • Y10T428/12799—Next to Fe-base component [e.g., galvanized]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12951—Fe-base component
    • Y10T428/12972—Containing 0.01-1.7% carbon [i.e., steel]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12951—Fe-base component
    • Y10T428/12972—Containing 0.01-1.7% carbon [i.e., steel]
    • Y10T428/12979—Containing more than 10% nonferrous elements [e.g., high alloy, stainless]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12993—Surface feature [e.g., rough, mirror]

Definitions

  • the invention relates to a method for manufacturing a metal strip having an improved appearance, more particularly intended to be used for the manufacture of skin parts for motorized land vehicles, without being limited thereto.
  • Steel sheets for the manufacture of parts for land motor vehicles are generally coated with a zinc-based, corrosion-resistant metallic layer deposited either by hot dipping in a zinc-based liquid bath or by electroplating in an electrolytic bath comprising zinc ions.
  • the galvanized sheets for the manufacture of skin parts are then shaped and assembled to form a blank body, which is then coated with at least one layer of paint, which provides increased protection against corrosion and good surface appearance.
  • paint which provides increased protection against corrosion and good surface appearance.
  • a total paint thickness of between 90 and 120 ⁇ m, consisting of a layer of cataphoresis 20 to 30 ⁇ m thick, a layer of primer paint from 40 to 50 ⁇ m, and a base coat of 30 to 40 ⁇ m, for example.
  • the corrugation W (waviness in English) of the surface is a geometric irregular softness, pseudoperiodic, of rather long wavelength (0.8 to 10 mm) that one distinguishes from the roughness R which corresponds to the geometrical irregularities low wavelengths ( ⁇ 0.8mm).
  • the arithmetic average Wa of the corrugation profile expressed in ⁇ m, has been retained to characterize the corrugation of the surface of the sheet, and the corrugation measurements have been carried out with a cut-off threshold of 0 , 8 mm and designated by Wa o , 8 -
  • the object of the invention is therefore to provide a method of manufacturing a metal strip coated with an anticorrosive coating, whose Wa O ⁇ 8 waviness is reduced compared to the bands of the prior art, thus making it possible to manufacture painted metal parts requiring a reduced total paint thickness compared to the parts of the prior art.
  • a first object of the invention is constituted by a method of manufacturing a metal strip having a corrosion protection metal coating, comprising the steps of:
  • the method according to the invention may further comprise the following features, taken alone or in combination:
  • the cooling is carried out at a speed of less than 10 ° C./s between the temperature at the spinning outlet and the beginning of the solidification, then at a speed greater than or equal to 15 ° C./s between the beginning and the end of its solidification,
  • the cooling is carried out at a speed of less than 10 ° C./s between the temperature at the spinning outlet and the beginning of the solidification, then at a speed greater than or equal to 20 ° C./s between the beginning and the end of its solidification,
  • the coated metal strip is dewatered so that the portion of the strip situated between the spinning line and ending at least 10 cm higher is in contact with an atmosphere whose oxidizing power is lower than that of an atmosphere constituted by 4% by volume of oxygen and 96% by volume of nitrogen,
  • the metal strip is a steel strip.
  • the invention also relates to a cold-rolled and hot-quenched but non-skin-pass coated metal strip obtainable by the method according to the invention, the metal coating of which comprises from 2 to 8% by weight of aluminum, from 0 to 5% by weight of magnesium, up to 0.3% by weight of additional elements, the balance consisting of zinc and unavoidable impurities, said coating having a waviness Wa o , 8 less than or equal to at 0.5 ⁇ m, preferably less than or equal to 0.45 ⁇ m.
  • the metal strip according to the invention may further comprise the following characteristics, taken alone or in combination:
  • the metal coating does not contain magnesium, the metal coating contains from 1 to 4% by weight of magnesium,
  • the metal strip is made of steel.
  • the subject of the invention is also a metal part obtained by deformation of a non-skin-passed metal strip, the coating of which has a waviness Wa 0 , less than or equal to 0.48 ⁇ m, preferably less than or equal to 0, 43.
  • the subject of the invention is furthermore a metal part obtained by deformation of a metal strip having undergone a skin-pass operation before deformation, the coating of which has a Wa 0 , ⁇ corrugation less than or equal to 0.35 ⁇ m, of preferably less than or equal to 0.32, or even 0.31 microns.
  • the first step of the process according to the invention is to continuously pass a metal strip, such as a steel strip, in a coating bath containing molten metal contained in a crucible.
  • the running speed of the strip on the industrial lines is generally between 40m / min and 200m / min, for example, and is preferably greater than 120m / min, or even greater than 150m / min.
  • composition of the coating bath to be used in the process according to the invention is based on zinc and contains from 2% to 8% by weight of aluminum, which is therefore an essential element of the coating.
  • the inventors have found that a coating comprising less than 2% by weight of aluminum does not make it possible to obtain an improvement of the corrugation by the process according to the invention. Likewise, a coating comprising more than 8% by weight of aluminum does not make it possible to obtain this desired effect for the invention. This element also makes it possible to improve the resistance to corrosion.
  • the bath may also contain up to 5% by weight of magnesium to improve the corrosion resistance of the galvanized coating and especially its resistance against red rust.
  • the inventors have found that the addition of this element does not question the results obtained on the corrugation by the addition of aluminum.
  • the composition of the bath may also contain up to 0.3% by weight of optional addition elements such as Si, Sb, Pb 1 Ti, Ca, Mn, Sn, La, Ce, Cr, Ni, Zr or Bi .
  • optional addition elements such as Si, Sb, Pb 1 Ti, Ca, Mn, Sn, La, Ce, Cr, Ni, Zr or Bi .
  • These various elements may allow, among other things, to improve the corrosion resistance of the coating or its fragility or adhesion, for example.
  • Those skilled in the art who know their effects on the characteristics of the coating will know how to use them according to the complementary aim sought. It has also been verified that these elements do not interfere with the control of the corrugation obtained by the process according to the invention.
  • the bath may contain unavoidable impurities from the crucible feed ingots or even the passage of the strip in the bath. It will be possible to mention, in particular, iron, etc.,
  • the bath is maintained at a temperature between that of the liquidus +10 ° C. and 700 ° C., the temperature of the liquidus varying according to its composition. For the range of coatings used in the present invention, this temperature will therefore be between 350 and 700 ° C. It will be recalled that the liquidus is the temperature above which an alloy is in the fully molten state, the solidus being the temperature below which an alloy is in the fully solidified state. For some compositions, the liquidus temperature may be equal to that of solidus.
  • the metal strip coated on both sides is then subjected to spinning by means of nozzles placed on on either side of the web that throws a gas, such as air or an inert gas, towards the surface of the web.
  • a gas such as air or an inert gas
  • the cooling must be carried out at a speed of less than 15 ° C./s, preferably less than 10 ° C./s, and more particularly preferably less than or equal to 5 ° C./s, between the temperature at the outlet of dewatering and the beginning of the solidification (that is to say when the coating falls just below the temperature of the liquidus), then at a speed greater than or equal to 15 c / s, preferably greater than 20 ° C / s, between the beginning and the end of its solidification (that is to say when the coating reaches the solidus temperature).
  • the cooling until the beginning of the solidification can be obtained by natural convection if it is desired to cool at a speed not exceeding about 5 ° C./s. Beyond that, it will generally be necessary to carry out forced cooling by any suitable technical means, such as a blowing of cold gas, for example.
  • the coated sheet When the coated sheet is completely cooled, it can undergo a skin-pass operation that gives it a texture to facilitate its subsequent shaping. Indeed, the operation of the skin-pass makes it possible to transfer to the surface of the sheet a roughness sufficient for its shaping to take place. under good conditions, favoring good retention of the oil applied to the sheet before shaping.
  • This skin-pass operation is generally performed for metal sheets intended for the manufacture of body parts for land motor vehicles.
  • the metal sheets according to the invention are intended for the manufacture of household appliances, for example, this additional operation is not carried out.
  • the skin-shaped sheet or not is then shaped, for example by stamping, bending or profiling, and preferably by stamping, to form a part that can then be painted.
  • stamping for example by stamping, bending or profiling, and preferably by stamping
  • this layer of paint may also optionally subject this layer of paint to an annealing by physical and / or chemical means, known in themselves.
  • the painted part can be passed through a hot air or induction furnace, or under UV lamps or under a device beam scattering electrons.
  • a primer coat for the production of parts for the automobile, it is soaked in a cataphoresis bath, and applied successively, a primer coat, a base coat of paint, and optionally a layer of finishing varnish.
  • a primer coat Before applying the cataphoresis layer on the part, it is previously degreased and phosphated to ensure the adhesion of cataphoresis.
  • the cataphoresis layer provides the part with additional protection against corrosion.
  • the primer coat usually applied by spray, prepares the final appearance of the part and protects it from gravel and UV.
  • the base coat of paint gives the piece its color and its final appearance.
  • the varnish layer gives the surface of the part a good mechanical resistance, a resistance against aggressive chemical agents and a good surface appearance.
  • the layer of paint (or paint system) used to protect and guarantee an optimal surface appearance to galvanized parts has a cataphoresis layer 10 to 20 ⁇ m thick, a primer coat of less than 30 ⁇ m, and a base coat of less than 40 microns.
  • the thicknesses of the different layers of paint are generally as follows:
  • - cataphoresis layer less than 10 to 20 ⁇ m
  • - primer coat less than 20 ⁇ m
  • base paint layer less than 20 ⁇ m and advantageously less than 10 ⁇ m
  • - Varnish layer preferably less than less than 30 microns.
  • the paint system may also not include a cataphoresis layer, and include only one layer of primer paint and a base coat of paint and possibly a layer of varnish.
  • This adjustment of the oxidation level may be carried out by any suitable means, such as, for example, a containment box covering the spinning zone and supplied with neutral gas such as nitrogen. It will also be possible to use an oxygen-poor gas as a spin gas and not particularly to feed the box with inert gas, which is then only fed by the spin gas flow. To determine the oxidizing power of the atmosphere surrounding the band, one will proceed to the evaluation of its oxygen equivalent partial pressure at equilibrium.
  • pO 2 must be between 0.0015 and 0.04.
  • the possible containment box may be desirable to extend the possible containment box to the surface of the bath or to an intermediate position between the bath and the spin line in order to limit the oxidation before spinning. Indeed, when the surface of the sheet is exposed to the air, such a layer is formed systematically but is mostly removed and returned to the coating bath under the impact of the spin jet. Such confinement thus makes it possible to reduce the quantity of oxides in the bath which can be entrained by the strip during its travel and thus create unacceptable defects. However, it has the disadvantage of promoting the vaporization of zinc from the bath, vapors which can then come to foul the containment box.
  • spin nozzles Although all kinds of spin nozzles can be used for the implementation of the method according to the invention, it will be more particularly preferred to choose nozzles whose outlet orifice is in the form of a blade whose width exceeds that of strip to put on. This type of nozzle makes it possible to achieve good confinement of the lower part of the spinning zone.
  • the tests are carried out from a cold rolled IF-Ti steel sheet metal, which is passed through a crucible containing a zinc-based metal bath comprising variable proportions of aluminum and magnesium. It is maintained at a temperature of 70 ° C. above the liquidus of the composition.
  • the coating obtained is wrung out with nitrogen using two conventional nozzles so as to obtain a coating thickness of about 7 .mu.m.
  • the cooling rate can be set between 5 and 50 ° C / s.
  • a test (referenced 17) was also carried out by carrying out a nitrogen spinning in a confined chamber with limitation of the oxygen content. at 4% by volume in the zone starting at the level of the spin line and ending 10 cm higher.
  • the ripple values Wa o , ⁇ are measured .
  • This measurement consists in acquiring by mechanical palpation, without pad, a profile of the sheet of a length of 50 mm, measured at 45 ° of the rolling direction. The approximation of its general form is subtracted from the signal obtained by a polynomial of degree at least 5. The waviness Wa is then isolated from the roughness Ra by a Gaussian filter at the cut-off point of 0.8 mm.
  • the present inventors have found that too rapid cooling in the first cooling phase, before reaching the liquidus, was also detrimental to the appearance of the coating, as shown in tests 4 to 6 where observes that exceeding the threshold of 15 ° C / s significantly degrades the ripple from 0.47 to 3.01 microns when changing from 10 to 15 ° C / s. It is therefore found that this first cooling step is also important for obtaining the desired surface appearance, which leads to the conclusion that the entire cooling process must be controlled.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Thermal Sciences (AREA)
  • Coating With Molten Metal (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
PCT/FR2009/000560 2008-05-14 2009-05-14 Procede de fabrication d'une bande metallique revetue presentant un aspect ameliore Ceased WO2009147309A1 (fr)

Priority Applications (15)

Application Number Priority Date Filing Date Title
UAA201010560A UA107326C2 (en) 2008-05-14 2009-05-14 Method for producing a coaed metal strip having an improved appearance
JP2011508972A JP5677289B2 (ja) 2008-05-14 2009-05-14 外観が改善された被覆金属ストリップを製造する方法
US12/919,097 US9914992B2 (en) 2008-05-14 2009-05-14 Coated metal strip having an improved appearance
CA2714220A CA2714220C (fr) 2008-05-14 2009-05-14 Procede de fabrication d'une bande metallique revetue presentant un aspect ameliore
ES09757685T ES2385287T3 (es) 2008-05-14 2009-05-14 Procedimiento de fabricación de una banda metálica revestida que presenta un aspecto mejorado
PL09757685T PL2297372T3 (pl) 2008-05-14 2009-05-14 Sposób wytwarzania powlekanej taśmy metalowej o poprawionym wyglądzie
MX2010008776A MX2010008776A (es) 2008-05-14 2009-05-14 Procedimiento de fabricacion de banda metalica recubierta que presenta un aspecto mejorado.
EP09757685A EP2297372B1 (fr) 2008-05-14 2009-05-14 Procede de fabrication d'une bande metallique revetue presentant un aspect ameliore
KR1020107019363A KR101259595B1 (ko) 2008-05-14 2009-05-14 향상된 외관을 갖는 코팅된 금속 스트립의 제조 방법
AT09757685T ATE551436T1 (de) 2008-05-14 2009-05-14 Verfahren zur herstellung eines beschichteten metallbands mit verbessertem aussehen
BRPI0910310-4A BRPI0910310B1 (pt) 2008-05-14 2009-05-14 Processo de fabricação de uma tira metálica, tira metálica e peça metálica obtida por deformação
CN2009801070225A CN101981219B (zh) 2008-05-14 2009-05-14 生产具有改善外观的涂覆金属带材的方法
ZA2010/05488A ZA201005488B (en) 2008-05-14 2010-07-30 Method for producing a coated metl strip having an improved appearance
MA33148A MA32143B1 (fr) 2008-05-14 2010-09-03 Procede de fabrication d'une bande metallique revetue presentant un aspect ameliore
US15/703,930 US10550458B2 (en) 2008-05-14 2017-09-13 Method for producing a coated metal strip having an improved appearance

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EP08290450A EP2119804A1 (fr) 2008-05-14 2008-05-14 Procédé de fabrication d'une bande métallique revêtue présentant un aspect amélioré

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RU2621518C2 (ru) * 2012-04-25 2017-06-06 Ниссин Стил Ко., Лтд. Способ производства стального листа с черным покрытием и способ производства формованного изделия из стального листа с черным покрытием
RU2623963C2 (ru) * 2012-04-25 2017-06-29 Ниссин Стил Ко., Лтд. Способ производства стального листа с черным покрытием и способ производства формованного изделия из стального листа с черным покрытием
US10344368B2 (en) * 2009-05-14 2019-07-09 ArcelorMittal Investigación y Desarrollo, S.L. Coated metal strip having an improved appearance
WO2022101872A1 (en) 2020-11-16 2022-05-19 Arcelormittal A method for manufacturing a steel sheet with a znalmg coating, corresponding coated steel sheet, part and vehicle

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US10344368B2 (en) * 2009-05-14 2019-07-09 ArcelorMittal Investigación y Desarrollo, S.L. Coated metal strip having an improved appearance
US11371128B2 (en) 2009-05-14 2022-06-28 Arcelormittal Coated metal band having an improved appearance
RU2621518C2 (ru) * 2012-04-25 2017-06-06 Ниссин Стил Ко., Лтд. Способ производства стального листа с черным покрытием и способ производства формованного изделия из стального листа с черным покрытием
RU2623963C2 (ru) * 2012-04-25 2017-06-29 Ниссин Стил Ко., Лтд. Способ производства стального листа с черным покрытием и способ производства формованного изделия из стального листа с черным покрытием
WO2022101872A1 (en) 2020-11-16 2022-05-19 Arcelormittal A method for manufacturing a steel sheet with a znalmg coating, corresponding coated steel sheet, part and vehicle
WO2022101667A1 (en) 2020-11-16 2022-05-19 Arcelormittal A method for manufacturing a steel sheet with a znalmg coating, corresponding coated steel sheet, part and vehicle
US12325893B2 (en) 2020-11-16 2025-06-10 Arcelormittal Method for manufacturing a steel sheet with a ZnAlMg coating, corresponding coated steel sheet, part and vehicle

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US9914992B2 (en) 2018-03-13
EP2119804A1 (fr) 2009-11-18
US10550458B2 (en) 2020-02-04
EP2297372A1 (fr) 2011-03-23
CA2714220A1 (fr) 2009-12-10
KR20100118129A (ko) 2010-11-04
ATE551436T1 (de) 2012-04-15
JP2015083721A (ja) 2015-04-30
US20110111255A1 (en) 2011-05-12
BRPI0910310B1 (pt) 2019-07-02
UA107326C2 (en) 2014-12-25
CA2714220C (fr) 2012-12-18
MA32143B1 (fr) 2011-03-01
US20180002798A1 (en) 2018-01-04
ES2385287T3 (es) 2012-07-20
RU2457275C2 (ru) 2012-07-27
PL2297372T3 (pl) 2012-09-28
ZA201005488B (en) 2011-09-28
RU2010136313A (ru) 2012-03-10
BRPI0910310A2 (pt) 2016-04-26
MX2010008776A (es) 2010-08-30
KR101259595B1 (ko) 2013-04-30
JP2011521103A (ja) 2011-07-21
JP5677289B2 (ja) 2015-02-25
EP2297372B1 (fr) 2012-03-28
JP5986185B2 (ja) 2016-09-06
CN101981219B (zh) 2012-09-12
CN101981219A (zh) 2011-02-23

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