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WO2021122106A1 - Feuille de métal présentant une structure de surface déterministe et procédé de production d'un composant de métal en feuille formé et revêtu - Google Patents

Feuille de métal présentant une structure de surface déterministe et procédé de production d'un composant de métal en feuille formé et revêtu Download PDF

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Publication number
WO2021122106A1
WO2021122106A1 PCT/EP2020/084888 EP2020084888W WO2021122106A1 WO 2021122106 A1 WO2021122106 A1 WO 2021122106A1 EP 2020084888 W EP2020084888 W EP 2020084888W WO 2021122106 A1 WO2021122106 A1 WO 2021122106A1
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WO
WIPO (PCT)
Prior art keywords
area
sheet
metal
surface structure
valley
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/EP2020/084888
Other languages
German (de)
English (en)
Inventor
Fabian JUNGE
Tobias LEWE
Burak William Cetinkaya
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.)
ThyssenKrupp Steel Europe AG
Original Assignee
ThyssenKrupp Steel Europe 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 ThyssenKrupp Steel Europe AG filed Critical ThyssenKrupp Steel Europe AG
Priority to CN202080087503.0A priority Critical patent/CN114829029A/zh
Priority to US17/779,700 priority patent/US20230002910A1/en
Priority to EP20823757.8A priority patent/EP4076777B1/fr
Publication of WO2021122106A1 publication Critical patent/WO2021122106A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/227—Surface roughening or texturing
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D13/00—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form
    • B21D13/10—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form into a peculiar profiling shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H8/00—Rolling metal of indefinite length in repetitive shapes specially designed for the manufacture of particular objects, e.g. checkered sheets
    • B21H8/005—Embossing sheets or rolls
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/06—Zinc or cadmium or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/26—After-treatment
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
    • C23C2/36—Elongated material
    • C23C2/40—Plates; Strips
    • 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
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/07—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
    • 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
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/07—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
    • C23C22/08—Orthophosphates
    • 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
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/07—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
    • C23C22/08—Orthophosphates
    • C23C22/12—Orthophosphates containing zinc cations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/14—Roughness
    • 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
    • C23C2222/00—Aspects relating to chemical surface treatment of metallic material by reaction of the surface with a reactive medium
    • C23C2222/20—Use of solutions containing silanes

Definitions

  • the invention relates to a metal sheet with a deterministic surface structure, the surface structure being embossed into the metal sheet, the surface structure having at least one mountain region and at least one valley region, the mountain region and the valley region being connected by a flank region.
  • the invention also relates to a method for producing a formed and painted sheet metal component.
  • Zinc phosphate layers are used to refine the surface of coated (galvanized, hot-dip aluminized) and uncoated metal sheets in order to significantly improve surface-relevant properties. Above all, this includes increasing corrosion resistance and improving formability and paint adhesion.
  • Zinc phosphate layers are inorganic crystalline metal phosphate layers that are deposited from an aqueous phase. These are not closed layers, but an accumulation of individual zinc phosphate crystals, the position, size, distribution, composition and chemical and mechanical properties of which depend on a number of production factors. Above all, this includes the composition of the phosphating solution, the preparation of the substrate and the process parameters during the phosphating.
  • the phosphating process is a multi-stage process which, in addition to multi-stage rinsing steps, is primarily composed of a pretreatment step, an activation step and at least one phosphating step.
  • the applied zinc phosphate crystals result in a significant increase in the surface area, which leads to improved forming properties (improved oil retention capacity and more homogeneous oil distribution).
  • the crystals also serve as an ideal primer for paints.
  • multi-stage process cleaning, activating, phosphating and rinsing; monitoring
  • energetic the individual process baths are a few to many cubic meters in size and must be kept in constant motion and sometimes up to 60 ° C) be tempered
  • chemicals including disposal costs, maintenance
  • trication phosphating to increase temperature and alkali resistance as well as to refine the grain and adjust the color
  • the automotive industry is keen to make the zinc phosphating process more environmentally friendly and process reliable alternative to replace. Examples of this are nickel-free phosphating or silane-based systems.
  • the object of the invention is therefore to specify a sheet metal and a method for producing a formed and painted sheet metal component with which a reduced or no zinc phosphating effort is possible compared to the prior art, the surface having essentially comparable properties to a conventionally zinc phosphated surface having.
  • a defined surface structure on a dressed sheet metal is essential for further processes, especially in the processing industry for the manufacture of sheet metal components in the automotive industry.
  • process media used such as oil and / or lubricants
  • the sheet metal is subjected to a rolling process (skin pass), in which, among other things. a roughness is set on the metal sheet using textured skin pass rollers.
  • strip waves can also be eliminated and / or compensated for by skin-pass if the sheet metal has been subjected to a thermal treatment (annealing, etc.) in particular beforehand.
  • the skin pass also causes a decrease in thickness and / or elongation between the incoming and outgoing sheet metal / strip (skin pass degree), so that among other things. the mechanical properties of the sheet metal can also be adjusted in a targeted manner.
  • metal sheets can be produced with a deterministic surface structure which not only combines the aforementioned advantages, but can also at least partially or completely replace conventional zinc phosphating by using a Artificial enlargement of the surface is created in such a way that the mountain area and / or the valley area has a substructure which is designed in such a way that the substructure has a surface that is at least 3% larger than a planar projection area of the mountain area and / or the valley area or has an Sdr value of at least 3%.
  • the surface enlargement is no longer produced by zinc phosphating or by zinc phosphate crystals, but rather by a larger surface that can be set in a targeted manner.
  • the specifically adjusted surface enlargement not only serves as an optimal primer for a lacquer coating, but can also promote the adhesive suitability by providing a larger interface, in that the adhesive can be offered a corresponding reaction surface.
  • the substructure in particular has a surface that is at least 7%, preferably at least 10%, preferably at least 15%, preferably at least 20% larger surface compared to the planar projection surface of the mountain area and / or valley area, in particular determined by atomic force microscopy (AFM), which, for example, enables a resolution with an area of up to 90 x 90 pm 2.
  • AFM atomic force microscopy
  • a resolution in the order of magnitude for example, of a valley area or part of a valley area or a mountain area or part of a mountain area, which can also have an area smaller than 90 ⁇ 90 ⁇ m 2 , for example.
  • a planar projection surface of the mountain region or valley region is to be understood as a flat surface which is visible and / or determinable in plan view, parallel to the sheet metal plane.
  • the larger surface area created by the substructure in the mountain area or valley area corresponds to the actual, determinable three-dimensional (upper) area.
  • the Sdr value relates to a developed limit value ratio or is also a measure for the surface enlargement, which indicates the percentage of the additional area of a definition area that can be traced back to a texture (substructure) compared to the absolutely flat definition area, wherein the definition area (resolution) can be directed to a part of the valley area or to a valley area and / or to a part of the mountain area or to a mountain area.
  • the substructure in particular has an Sdr value of at least 7%, preferably of at least 10%, preferably of at least 15%, preferably of at least 20%.
  • a plane surface would have an Sdr value of 0.
  • the Sdr value can also be determined, for example, by or by means of atomic force microscopy (AFM).
  • deterministic surface structure are to be understood recurring structures (at least one valley area or valley area and at least one mountain area), which one have a defined shape and / or configuration, see EP 2 892 663 Bl.
  • this also includes surfaces with a (quasi-) stochastic appearance, which, however, are applied by means of a deterministic texturing process and are thus composed of deterministic form elements.
  • a continuous mountain area with several recurring valley areas, which are each connected to the mountain area by flank areas is designed as a surface structure.
  • Metal sheet is to be understood in general as a flat metal product which can be provided in sheet form or in the form of a plate or in the form of a strip.
  • the substructure is formed like a crystal in the mountain area and / or in the valley area.
  • the crystal-like design can be elongated and / or spherical and / or oval as an elevation and / or depression in the mountain area and / or valley area, with a length, width or diameter of the crystal-like design between 0.5 and 20 ⁇ m, in particular between 0 , 9 and 15 gm, preferably between 1.2 and 10 pm, is set.
  • the metal sheet is coated with a metallic coating.
  • the metal sheet can be coated with a zinc-based coating which is applied by hot-dip coating.
  • the metal sheet is a steel sheet.
  • the coating can preferably contain additional elements such as aluminum with a content of up to 5% by weight and / or magnesium with a content of up to 5% by weight in the coating.
  • Steel sheets with a zinc-based coating have very good cathodic corrosion protection, which has been used in automotive engineering for years. If improved corrosion protection is provided, the coating additionally has magnesium with a content of at least 0.3% by weight, in particular of at least 0.6% by weight, preferably of at least 0.9% by weight.
  • aluminum can be present with a content of at least 0.3% by weight, in particular to improve bonding of the coating to the steel sheet and in particular a diffusion of iron from the steel sheet into the coating during a heat treatment of the coated To prevent steel sheet essentially, so that the positive corrosion properties are retained.
  • the thickness of the coating can be between 1 and 15 ⁇ m, in particular between 2 and 12 ⁇ m, preferably between 3 and 10 ⁇ m. Below the minimum limit, no adequate cathodic corrosion protection can be guaranteed and above the maximum limit, joining problems can occur when joining the steel sheet according to the invention or a component made from it to another component; in particular, if the maximum limit specified is exceeded, no stable process during thermal joining or thermal joining can occur. Welding can be ensured.
  • hot-melt exchange coating the steel sheets are first coated with an appropriate coating and then passed to the skin pass. The skin pass takes place after the hot-dip coating of the steel sheet.
  • the metal sheet can be coated with a metallic coating, in particular a zinc-based coating, which is applied by electrolytic coating.
  • a thickness of the coating can be between 1 and 10 gm, in particular between 1.5 and 8 gm, preferably between 2 and 5 gm.
  • the steel sheet can first be skin-passed and then electrolytically coated. Depending on the thickness of the coating, the roughness in the flank area can essentially be retained even after the electrolytic coating. Alternatively, an electrolytic coating with subsequent skin-passing is also conceivable.
  • no coating for example no metallic coating
  • the metal sheet is / is coated with a non-metallic coating, for example in a coil coating system, the metal sheet being coated with a non-metallic coating before or after the coating.
  • the metal sheet is coated with a phosphate coating or a silane-based coating, the thickness of the phosphate coating or silane-based coating in particular being less than 500 nm.
  • the metal sheet can be coated with a phosphate coating be coated or with a silane-based coating.
  • the thickness of the phosphate coating or silane-based coating can be set to less than 500 nm, in particular less than 200 nm, preferably less than 100 nm, preferably less than 50 nm, particularly preferably less than 25 nm.
  • Conventional zinc phosphating forms a coating with a thickness of at least 500 nm on the surface of a metal sheet, which is insulating, electrically non-conductive and can thus interfere with the process in a welding process, in particular in a resistance welding process.
  • a reduction of an insulating, Electrically non-conductive phosphate coating or a silane-based coating with a thickness below 500 nm does not represent a process-disruptive factor.
  • the invention relates to a method for producing a formed and painted sheet metal component, the method comprising the following steps:
  • a metal sheet with a deterministic surface structure having been embossed into the metal sheet by means of a skin pass roller, the surface structure having at least one mountain area and at least one valley area, the mountain area and the valley area being connected by a flank area,
  • the skin-pass roller with which the surface structure was embossed into the sheet metal, produced a substructure during the embossing in the mountain area and / or in the valley area, such that a substructure with a surface area that is at least 3% larger than a planar projection area of the Mountain area and / or valley area or with an Sdr value of at least 3%.
  • a corresponding sheet metal is provided, which is cut before, during and / or after the deformation.
  • the forming takes place with conventional tools.
  • the formed sheet metal component is painted in a conventional manner.
  • At least one valley area can be designed as an open structure. Mountain areas on the skin-pass roller thus define local and recurring bumps on the surface of the skin-pass roller.
  • the mountain areas of the skin pass roller are embossed into the surface of the metal sheet and form a surface structure with an essentially closed structure (closed volume).
  • the mountain areas of the skin pass roller thus produce pocket-like structures on the surface of the sheet metal.
  • the closed volume the so-called empty volume, can accommodate a process medium, for example forming oil, which is applied for later processing, in particular by means of a forming process.
  • a (negative) substructure is formed in the at least one valley area and / or in the mountain area or mountain area of the skin pass roller, which by acting on the surface of the Metal sheet produces a (positive) substructure with a surface area that is at least 3% larger than a planar projection surface of the mountain area and / or valley area or with an Sdr value of at least 3%.
  • the generation of a deterministic surface topography with at least one mountain area or mountain area and at least one valley area including (negative) substructure on the surface of the skin-pass roller can be carried out in a targeted manner by means of a laser texturing process, see EP 2 892 663 Bl.
  • the geometric configuration (size and depth) of the deterministic surface topography in the form of at least one mountain area or mountain area and at least one valley area including (negative) substructure can be set individually by using a pulsed laser as a result of material removal on the surface of the skin-pass roller.
  • targeted control of the energy and the pulse duration of a laser beam acting on the surface of the skin-pass roller can have a positive influence on the design of the structure (s).
  • the interaction time between the laser beam and the skin-pass roller surface increases with a longer or longer pulse duration, and more material can be removed from the surface of the skin-pass roller.
  • a pulse leaves an essentially circular, in particular concave, crater on the skin-pass roller surface, which after skin-pass treatment depicts the surface of the steel sheet.
  • a reduction in the pulse duration has an influence on the formation of a crater; in particular, the diameter of the crater can be reduced.
  • By reducing the pulse duration in particular when using short or ultra-short pulse lasers, it is possible to set the geometric structure on the surface of a skin-pass roller in such a way that a sheet steel surface can be functionally textured. This is achieved, for example, if the pulse duration of the laser with which the surface of the skin pass roller is textured is reduced and the geometric structure on the roller can thus be generated with a higher resolution.
  • no zinc phosphating has been carried out before the metal sheet is formed.
  • the laborious step of conventional zinc phosphating to generate a larger surface area using zinc phosphate crystals can essentially be omitted.
  • the metal sheet has been coated with a phosphate coating or a silane-based coating before the metal sheet is provided, the thickness of the coating being in particular less than 500 nm.
  • the phosphating includes in particular a deposit / separation of surfactants, a conversion chemistry or a pickling, for example with phosphoric acid.
  • the metal sheet has been treated with an acidic solution before or after the introduction of the surface structure.
  • an “acidic” solution which has a pH value of less than 3, in particular less than 2, preferably less than 1, is preferably used to clean the surface and / or to remove oxide deposits (oxide layer) on the surface of the metal sheet.
  • the sheet metal component is an outer skin part of a vehicle.
  • Outer skin parts in particular are subject to strict requirements for suitability for forming and the appearance of paint.
  • Corresponding outer skin parts can be produced inexpensively by the invention.
  • the sheet metal component is a structural part of a vehicle.
  • Figure 1 a schematic partial sectional view of an embodiment from the prior art
  • FIG. 2 a schematic partial sectional view of an embodiment according to FIG.
  • FIG. 4 a schematic sequence of an embodiment according to a method according to the invention.
  • FIG. 1 shows a schematic partial sectional view of an embodiment from the prior art.
  • the design can be, for example, the design according to EP 2 892 663 Bl correspond.
  • Shown is a metal sheet (1) with a deterministic surface structure (2), the surface structure (2) being embossed into the metal sheet (1), the surface structure (2) having at least one mountain area (1.1) and at least one valley area (1.2) , the mountain area (1.1) and the valley area (1.2) being connected by a flank area (1.3).
  • the metal sheet (1) is preferably a steel sheet.
  • FIG. 2 shows a schematic partial sectional view of an embodiment according to the invention.
  • the mountain area (1.1) and / or the valley area (1.2) has a substructure (1.11, 1.21) which is designed such that the substructure (1.11, 1.21) has a surface area that is at least 3% larger in comparison to a planar projection surface (P) of the mountain area (1.1) and / or the valley area (1.2) or has an Sdr value of at least 3%.
  • the substructure (1.11, 1.21) can be crystal-like in the mountain area (1.1) and / or in the valley area (1.2), the crystal-like formation being elongated and / or spherical as an elevation and / or depression, shown as a depression in this embodiment, in the mountain area (1.1) and / or valley region (1.2), it being possible in particular to set a length, width or diameter of the crystal-like configuration between 0.5 and 20 ⁇ m.
  • FIG. 3 shows a schematic partial sectional view of a further embodiment according to the invention.
  • the metal sheet (1) is coated with a metallic coating (3), preferably with a zinc-based coating.
  • the metal sheet (1) is coated with a phosphate coating (4), it being possible for the thickness of the phosphate coating (4) to be less than 500 nm.
  • a metal sheet (1) according to the invention in particular in accordance with the embodiment in FIG. 3, is provided to provide a reshaped and painted sheet metal component, not shown, (A).
  • the provided sheet metal (1) is reshaped into a reshaped sheet metal component (B).
  • the formed sheet metal component is painted, (C).
  • FIG. 4 schematically shows a corresponding sequence of the method according to the invention.
  • the formed and painted sheet metal component, not shown, can be used as an outer skin part or a structural part in the vehicle.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Laminated Bodies (AREA)
  • Coating With Molten Metal (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

L'invention concerne une feuille de métal (1) présentant une structure de surface déterministe (2), la structure de surface (2) étant emboutie dans la feuille de métal (1), la structure de surface (2) présentant au moins une région de pic (1.1) et au moins une région de creux (1.2), la région de pic (1.1) et la région de creux (1.2) étant raccordées par une région de flanc (1.3), la région de pic (1.1) et/ou la région de creux (1.2) présentant une sous-structure (1.11, 1.21), qui est conçue de sorte que la sous-structure (1.11, 1.21) présente une surface qui est au moins 3 % plus grande qu'une surface de saillie plate (P) de la région de pic (1.1) et/ou de la région de creux (1.2) ou présente une valeur Sdr d'au moins 3 %. L'invention concerne en outre un procédé de production d'un composant de métal en feuille formé et revêtu.
PCT/EP2020/084888 2019-12-16 2020-12-07 Feuille de métal présentant une structure de surface déterministe et procédé de production d'un composant de métal en feuille formé et revêtu Ceased WO2021122106A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN202080087503.0A CN114829029A (zh) 2019-12-16 2020-12-07 具有确定性的表面结构的金属板材和用于制造成形且涂漆的板材构件的方法
US17/779,700 US20230002910A1 (en) 2019-12-16 2020-12-07 Metal sheet having a deterministic surface structure and method for producing a formed and coated sheet-metal component
EP20823757.8A EP4076777B1 (fr) 2019-12-16 2020-12-07 Feuille de métal présentant une structure de surface déterministe et procédé de production d'un composant de métal en feuille formé et revêtu

Applications Claiming Priority (2)

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DE102019219651.9A DE102019219651A1 (de) 2019-12-16 2019-12-16 Metallblech mit einer deterministischen Oberflächenstruktur und Verfahren zur Herstellung eines umgeformten und lackierten Blechbauteils
DE102019219651.9 2019-12-16

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WO2021122106A1 true WO2021122106A1 (fr) 2021-06-24

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WO (1) WO2021122106A1 (fr)

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DE102021119589A1 (de) 2021-07-28 2023-02-02 Thyssenkrupp Steel Europe Ag Metallblech mit einer deterministischen Oberflächenstruktur
DE102022102111A1 (de) 2022-01-31 2023-08-03 Thyssenkrupp Steel Europe Ag Unbeschichtetes kaltgewalztes Stahlblech für die Warmumformung, Verfahren zur Herstellung eines warmumgeformten Stahlblechbauteils und warmumgeformtes Stahlblechbauteil
DE102022122772A1 (de) 2022-09-08 2024-03-14 Thyssenkrupp Steel Europe Ag Stahlblech für fleckenfreie Phosphatierung
DE102022122775A1 (de) 2022-09-08 2024-03-14 Thyssenkrupp Steel Europe Ag Stahlblech für fleckenfreie Phosphatierung
DE102022122773A1 (de) 2022-09-08 2024-03-14 Thyssenkrupp Steel Europe Ag Stahlblech für fleckenfreie Phosphatierung
DE102022122771A1 (de) 2022-09-08 2024-03-14 Thyssenkrupp Steel Europe Ag Stahlblech für fleckenfreie Phosphatierung
DE102022123741A1 (de) * 2022-09-16 2024-03-21 Thyssenkrupp Steel Europe Ag FAL-beschichtetes Stahlblech für die Warmumformung
DE102023106688A1 (de) 2023-03-17 2024-09-19 Thyssenkrupp Steel Europe Ag Geklebte Bauteilgruppe
DE102024107448A1 (de) 2024-03-15 2025-09-18 Thyssenkrupp Steel Europe Ag Verfahren zum Herstellen eines schmelztauchbeschichteten Kaltbands

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DE69423784T2 (de) * 1993-09-17 2000-11-02 Sidmar N.V., Gent Verfahren und vorrichtung zur herstellung von kaltgewalzten metallblechen oder -bändern, und daraus gewonnene metallbleche oder -bänder
EP2892663B1 (fr) 2012-09-07 2016-11-09 Daetwyler Graphics AG Produit plat constitué d'un matériau métallique, en particulier d'un matériau acier, utilisation dudit produit plat, ainsi que cylindre et procédé de fabrication dudit produit plat
WO2018149967A1 (fr) * 2017-02-17 2018-08-23 Voestalpine Stahl Gmbh Procédé de fabrication de tôles d'acier, tôle d'acier et son utilisation

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US20230002910A1 (en) 2023-01-05
EP4076777B1 (fr) 2023-11-15
DE102019219651A1 (de) 2021-06-17
CN114829029A (zh) 2022-07-29
EP4076777A1 (fr) 2022-10-26

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