WO2021052812A1 - Stahlblech mit einer deterministischen oberflächenstruktur - Google Patents

Stahlblech mit einer deterministischen oberflächenstruktur Download PDF

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Publication number
WO2021052812A1
WO2021052812A1 PCT/EP2020/075056 EP2020075056W WO2021052812A1 WO 2021052812 A1 WO2021052812 A1 WO 2021052812A1 EP 2020075056 W EP2020075056 W EP 2020075056W WO 2021052812 A1 WO2021052812 A1 WO 2021052812A1
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WO
WIPO (PCT)
Prior art keywords
steel sheet
surface structure
coating
area
steel
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/EP2020/075056
Other languages
German (de)
English (en)
French (fr)
Inventor
Oliver Vogt
Fabian JUNGE
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 US17/641,695 priority Critical patent/US12121945B2/en
Priority to EP20768579.3A priority patent/EP4031301A1/de
Priority to CN202080065190.9A priority patent/CN114423536B/zh
Priority to JP2022516656A priority patent/JP2022548266A/ja
Publication of WO2021052812A1 publication Critical patent/WO2021052812A1/de
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • 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
    • B32B15/013—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 a metal other than iron or aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/227—Surface roughening or texturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/005—Rolls with a roughened or textured surface; Methods for making same
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/02—Shape or construction of rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/02—Shape or construction of rolls
    • B21B27/021—Rolls for sheets or strips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
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    • 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
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    • B32B3/263—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer having non-uniform thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
    • C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • C21D9/48—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals deep-drawing sheets
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C18/00—Alloys based on zinc
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C18/00—Alloys based on zinc
    • C22C18/04—Alloys based on zinc with aluminium as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
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    • 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
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
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    • 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
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    • C—CHEMISTRY; METALLURGY
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    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
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    • C—CHEMISTRY; METALLURGY
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    • B21B2001/228—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length skin pass rolling or temper rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/14—Roughness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2263/00—Shape of product
    • B21B2263/02—Profile, e.g. of plate, hot strip, sections
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2221/00—Treating localised areas of an article
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Definitions

  • the invention relates to a sheet steel dressed with a deterministic surface structure.
  • the invention also relates to a method for producing a steel sheet dressed with a deterministic surface structure.
  • the task is therefore to provide a sheet steel skinned with a deterministic surface structure which, compared to the prior art, provides properties that are equivalent or better.
  • a defined surface structure on a tempered steel sheet is essential for further processes, especially in the processing industry for the production of components for automobiles.
  • process media used such as oil and / or lubricants
  • These points relevant to the forming process are usually the contact surfaces between sheet steel and shaping tools - accordingly, not the embossments in the sheet steel, in which the process media preferentially collect, but the surface in the form of the area of the elevations on the sheet steel.
  • the inventors have found that in the case of a steel sheet dressed with a deterministic surface structure, properties that are equivalent or better than the prior art can be provided if the surface structure is embossed into the steel sheet starting from a surface of the steel sheet, the surface structure being one Has flank area which, starting from the surface, runs down to a valley area, wherein according to the invention at least the flank area has a roughness Ra greater than 20 nm in order to minimize the need for process medium and / or to place the process medium closer to or adjacent to the surrounding area. to keep positions relevant to the molding process in stock.
  • the local process medium distribution can in particular be influenced in a targeted manner, with a steel sheet with a conscious modeling of the flank area for better process-relevant properties in particular due to the inventive expression of the deterministic surface structure of the sheet steel surface in order to bring the process medium closer to the areas relevant to the forming process in a targeted manner.
  • a corresponding reaction surface or boundary layer can be made available through the specifically set roughness Ra.
  • the roughness Ra in the flank area can, if necessary, be limited to a maximum of 800 nm, in particular to a maximum of 700 nm, preferably to a maximum of 600 nm, preferably to a maximum of 500 nm, particularly preferably to a maximum of 400 nm, since the surface of the steel sheet in particular one of the subsequent shaping steps, such as for example during deep drawing, stretching or bending, is subject to major changes in shape, in particular on the outer fiber of the sheet steel.
  • the notch effect can lead to stress concentrations and thus, if there is a coating, to a failure of the coating.
  • a deterministic surface structure is understood to mean recurring surface structures which have a defined shape and / or configuration, cf. EP 2 892 663 Bl. In particular, this also includes surfaces with a (guasi-) stochastic appearance, which, however, are created by means of a deterministic texturing process are brought and are thus composed of deterministic form elements.
  • Sheet steel is generally to be understood as a flat steel product which can be provided in sheet form or in the form of a plate or in the form of a strip.
  • the surface structure has a flank area which, starting from the surface, runs down to a valley area and is formed at an angle between 1 ° and 89 ° to the perpendicular of the steel sheet.
  • the angle can in particular be formed between 50 ° and 87 °, preferably between 60 ° and 85 °, particularly preferably between 65 ° and 82 °.
  • the valley and flank area (negative shape) of the surface structure essentially corresponds to the surface (positive shape) on a skin pass roller, which forms or impresses the surface structure by corresponding action on the steel sheet.
  • the closed volume the so-called empty volume, can be adapted to a process medium to be applied, in particular oil, for later processing by means of a forming process.
  • the geometric configuration (size and depth) of a deterministic surface structure (negative shape) on a tempered steel sheet depends in particular on how the corresponding geometric structure (positive shape) is designed on a skin-pass roller.
  • Laser texturing processes are preferably used in order to be able to set specific structures (positive shape) on the surface of a skin pass roller by removing material.
  • the pulse duration and the selection of a suitable wavelength of a laser beam acting on the surface of the skin-pass roller the design of the structure (s) can be positively influenced. With a higher or higher pulse duration, the interaction time of the laser beam and skin-pass roller surface increases and more material can be removed from the surface of the skin-pass roller.
  • a pulse leaves an essentially circular crater on the skin-pass roller surface which, if there are several craters, maps the surface or the area of the elevations on the steel sheet and thus the contact area between the steel sheet and the forming tool after the skin-pass process.
  • 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.
  • the targeted setting of the roughness in the flank area and optionally the defined setting of the angle of the flank area can not only be useful for forming processes.
  • the targeted variation of the angle coupled with the adjustment of the roughness in the flank area allow more degrees of freedom in the functionalization of the sheet steel surface.
  • a defined and / or large reaction surface for example for chemical (post) treatment, in particular in the form of cleaning and / or phosphating, can be provided between the dressed sheet steel and the process medium.
  • the specifically set roughness Ra of the flank area preferably provides a surface quality during cleaning so that, for example, disruptive deposits on the boundary layer, in particular oxide deposits, can be removed relatively easily at least partially and / or in areas, in particular without the roughness of the surface structure in the flank area affect negatively.
  • the suitability of the steel sheet according to the invention to be adhesively bonded can essentially provide an optimal and / or large interface due to the targeted roughness in the flank area in order to offer the adhesive a corresponding reaction surface.
  • the steel sheet is coated with a metallic coating, in particular with a zinc-based coating which is applied by hot-dip coating.
  • 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. Is an improved If 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 essentially to prevent coated steel sheet so that the positive corrosion properties are retained.
  • a 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 with another component; in particular, if the maximum limit specified in the thickness of the coating is exceeded, no stable process during thermal joining can occur or welding can be ensured.
  • hot-dip 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 steel sheet is 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 ⁇ m, in particular between 1.5 and 8 ⁇ m, preferably between 2 and 5 ⁇ m.
  • 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.
  • an electrolytic coating with subsequent skin-passing is also conceivable.
  • no coating for example no metallic coating
  • the steel sheet is / is coated with a non-metallic coating, for example in a coil coating system, the steel sheet being coated with a non-metallic coating before or after the coating.
  • the particularly coated steel sheet is additionally sprinkled with a process medium, in particular with an oil.
  • a process medium in particular with an oil.
  • the process medium in particular being incorporated into the surface structure with a layer of up to 2 g / m 2. Due to the dimensioning of the surface structure, there is little need for process media, so that the layer can be up to 2 g / m 2 , in particular up to 1.5 g / m 2 , preferably up to 1 g / m 2 , preferably up to 0.6 g / m 2 , more preferably up to 0.4 g / m 2 .
  • the process medium is deposited after application essentially in the flank area and optionally at the transition between the flank area and valley area of the surface structure and stands for further processes, such as shaping processes, preferably for deep-drawing processes, closer to or adjacent to forming process-relevant points in order to improve the lubrication and to reduce the friction and thus the wear of the shaping means, such as shaping devices, preferably before (deep-drawing) presses.
  • accumulation of the process medium in tribologically unfavorable areas that do not contribute to the process medium supply into the actual contact or friction zone can be effectively suppressed.
  • the steel sheet according to the invention thus has very good tribological properties with a low process medium requirement and is more environmentally friendly in comparison to the, in particular oiled, steel sheets known from the prior art, in particular due to the lower use of resources.
  • the invention relates to a method for producing a steel sheet dressed with a deterministic surface structure, comprising the following steps:
  • Skin-passing of the steel sheet with a skin-pass roller the surface of the skin-pass roller, which acts on the surface of the steel sheet, is set up with a deterministic surface structure in such a way that, after skin-passing, the surface structure is embossed into the steel sheet starting from a surface of the steel sheet wherein the surface structure has a flank area which, starting from the surface, extends to a valley area and wherein at least the flank area has a roughness Ra greater than 20 nm.
  • the surface (positive shape) of the skin pass roller forms a surface structure through the action of force on the surface of the sheet steel, which defines a valley and flank area (negative shape) and essentially corresponds to the surface (positive shape) of the dressing roller.
  • the skin pass roller for the formation of a deterministic surface structure can be processed with suitable means, for example by means of a laser, see also EP 2 892 663 Bl.
  • other ablation processes can also be used to adjust a surface on a skin pass roller, for example machining production processes with geometrically determined or indeterminate cutting edges, chemical or electrochemical, optical or plasma-induced processes which are suitable
  • the steel sheet before the steel sheet is provided, the steel sheet is coated by hot-dip coating.
  • the melt for hot-dip 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.
  • the skin-passed steel sheet is coated by electrolytic coating.
  • the steel sheet is additionally provided with process medium, preferably with oil, after skin passing, the process medium with a coating of up to 2 g / m 2 , more preferably a coating of up to 0.4 g / m 2 2 is brought on.
  • FIG. 1 shows in FIG. 1) a schematic partial sectional view of an exemplary embodiment according to the invention of a steel sheet dressed with a deterministic surface structure
  • FIG. 1 shows a schematic partial sectional view of an exemplary embodiment according to the invention of a steel sheet (1,) dressed with a deterministic surface structure (2).
  • the steel sheet (1) can be an uncoated steel sheet (1), that is to say it has no, in particular, metallic coating or non-metallic coating, or a steel sheet (G) coated with a metallic coating (1.2).
  • the surface structure (2) is embossed into the steel sheet (1) starting from a surface (1.1) of the steel sheet (1), the surface structure (2) having a flank area (2.3) which, starting from the surface (1.1) up to a valley area (2.2) runs. At least the flank area (2.2) has a roughness Ra greater than 20 nm.
  • the flank area (2.3) and the valley area (2.2) through the corresponding area (positive shape) the skin pass roller, not shown, is set. Furthermore, in Figure 1) it can be clearly seen that the surface structure (2) has a flank area (2.3) which, starting from the surface (1.1), runs to a valley area (2.2) and to the perpendicular (0) of the steel sheet ( 1, G) is formed at an angle (a) between 1 ° and 89 °.
  • the flank area (2.3) encircling and forming the surface structure (2) defines, together with the one-piece valley area (2.2) which is closed or connected to the flank area (2.3), a closed volume of the surface structure (2) embossed in the steel sheet (1) by means of skin-passaging ).
  • FIGS. 2a), 2b) and 2c) each show schematic partial sectional views of different surface structures on a dressed steel sheet.
  • FIG. 2a) shows a schematic partial sectional view of a particularly coated steel sheet tempered with a stochastic surface structure, the surface structure having been tempered by means of an EDT-structured skin pass roller (not shown).
  • the surface structure is essentially completely filled or covered with a process medium (M), for example oil.
  • M process medium
  • the need for process media (M) is higher compared to the other two versions (Fig. 2b) and 2c)) because the surface structure in EDT is not designed as a closed structure but as an open structure.
  • FIG. 2b shows a schematic partial sectional view of a particularly coated sheet steel skinned with a deterministic surface structure, the surface structure having been skinned by means of a laser-structured skin pass roller (not shown), see EP 2 892 663 B1.
  • fewer process media (M) can be used since the surface structure is closed.
  • FIG. 2c The configuration according to the invention of a steel sheet (1, G), which is coated, in particular, and tempered with a deterministic surface structure (2) is shown schematically in FIG. 2c) in a partial sectional view, the surface structure (2) by means of a laser-structured skin-pass roller (not shown). , cf.
  • FIG. 3a shows an SEM image of a sheet metal topography provided with a zinc-based coating, the surface structure being embossed by means of a skin-pass roller (not shown), the surface of the skin-pass roller having been structured by means of a laser, see EP 2 892 663 Bl.
  • FIG. 3a shows an SEM image of a sheet metal topography provided with a zinc-based coating, the surface structure being embossed by means of a skin-pass roller (not shown), the surface of the skin-pass roller having been structured by means of a laser, see EP 2 892 663 Bl.
  • FIG. 3b shows an SEM image of the topography or deterministic surface structure (2) of a sheet steel () coated with a zinc-based coating (1.2), with the surface structure (2) was embossed by means of a skin-pass roller (not shown), where the surface of the skin-pass roller was structured by means of a laser, see EP 2 892 663 B1, but with the difference that the roughness Ra in the positive form on the The surface of the skin pass roller in the flank area (2.3) acting on the coated steel sheet (G) and to be produced has been set in a defined manner. The differently designed flank areas of the respective I structure are clearly visible.
  • VI and V4 correspond to steel sheets according to the invention (G) and V3 and V4 form reference sheets.
  • the difference between V3 and V4 and VI and V2 is that V3 and V4 were trained with a skin-pass roller with a deterministic surface structure and an undefined flank area, see embodiment Fig. 3a).
  • Table 1 shows a comparison of the steel sheets according to the invention () and reference sheets.
  • the determination of the roughness Ra was determined using the method specified in DIN EN ISO 4287 and the numerical values in the table refer to an area of 20 x 2 gm 2 , which only covers the flank area.
  • the roughness Ra in the steel sheets V3 and V4 was very small in the flank area.
  • Table 1 in relation to a strip drawing test, the cup drawing test according to DIN EN 1669, which was carried out on all four steel sheets VI to V4 under the same conditions, show essentially a positive result. The evaluation was based on the following criteria:
  • process medium coating (M) on the steel sheets VI and V2 coated according to the invention and treated with a deterministic surface structure could be reduced to less than 1 g / m 2 , the amount being sufficient to achieve a correspondingly good result.

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PCT/EP2020/075056 2019-09-17 2020-09-08 Stahlblech mit einer deterministischen oberflächenstruktur Ceased WO2021052812A1 (de)

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US17/641,695 US12121945B2 (en) 2019-09-17 2020-09-08 Sheet steel having a deterministic surface structure
EP20768579.3A EP4031301A1 (de) 2019-09-17 2020-09-08 Stahlblech mit einer deterministischen oberflächenstruktur
CN202080065190.9A CN114423536B (zh) 2019-09-17 2020-09-08 具有确定性的表面结构的钢板
JP2022516656A JP2022548266A (ja) 2019-09-17 2020-09-08 決定論的表面構造を有する鋼板

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DE102019214136.6A DE102019214136A1 (de) 2019-09-17 2019-09-17 Stahlblech mit einer deterministischen Oberflächenstruktur
DE102019214136.6 2019-09-17

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US12240022B2 (en) 2019-10-10 2025-03-04 Thyssenkrupp Steel Europe Ag Sheet steel having a deterministic surface structure
DE102020207561A1 (de) 2020-06-18 2021-12-23 Thyssenkrupp Steel Europe Ag Dressiertes und beschichtetes Stahlblech sowie Verfahren zu seiner Herstellung
DE102020208777A1 (de) 2020-07-14 2022-01-20 Thyssenkrupp Steel Europe Ag Dressiertes Stahlblech, Dressierwalze sowie Verfahren zur Herstellung eines dressierten Stahlblechs
DE102021119589A1 (de) 2021-07-28 2023-02-02 Thyssenkrupp Steel Europe Ag Metallblech mit einer deterministischen Oberflächenstruktur
DE102021125889A1 (de) * 2021-10-06 2023-04-06 Thyssenkrupp Steel Europe Ag Verfahren zum Dressieren eines Stahlblechs, dressiertes Stahlblech und daraus hergestelltes Bauteil
DE102021129934A1 (de) 2021-11-17 2023-05-17 Thyssenkrupp Steel Europe Ag Verfahren zum Herstellen eines schmelztauchbeschichteten Stahlblechs und schmelztauchbeschichtetes Stahlblech
DE102022114928A1 (de) * 2022-06-14 2023-12-14 Thyssenkrupp Steel Europe Ag Verfahren zum Dressieren eines schmelztauchbeschichteten Stahlblechs und entsprechend dressiertes, schmelztauchbeschichtetes Stahlblech
DE102022114930A1 (de) * 2022-06-14 2023-12-14 Thyssenkrupp Steel Europe Ag Dressiertes, schmelztauchbeschichtetes Stahlblech
DE102023126966A1 (de) 2023-10-04 2025-04-10 Thyssenkrupp Steel Europe Ag Verfahren zum Dressieren eines schmelztauchbeschichteten Stahlbands und ein mit Schlupf dressiertes Stahlflachprodukt

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