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EP3215656B1 - Procédé de production d'un revêtement anti-corrosion pour tôles d'acier trempables et revêtement anti-corrosion pour tôles d'acier trempables - Google Patents

Procédé de production d'un revêtement anti-corrosion pour tôles d'acier trempables et revêtement anti-corrosion pour tôles d'acier trempables Download PDF

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Publication number
EP3215656B1
EP3215656B1 EP15791573.7A EP15791573A EP3215656B1 EP 3215656 B1 EP3215656 B1 EP 3215656B1 EP 15791573 A EP15791573 A EP 15791573A EP 3215656 B1 EP3215656 B1 EP 3215656B1
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EP
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Prior art keywords
layer
zinc
nickel
manganese
copper
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EP15791573.7A
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German (de)
English (en)
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EP3215656A1 (fr
Inventor
Siegfried Kolnberger
Ernst Commenda
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Voestalpine Stahl GmbH
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Voestalpine Stahl GmbH
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04—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
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0278—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular surface treatment
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
    • C21D8/0478—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing involving a particular surface treatment
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • 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
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C23C2/026—Deposition of sublayers, e.g. adhesion layers or pre-applied alloying elements or corrosion protection
    • 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
    • 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
    • C23C28/023—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only
    • C23C28/025—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only with at least one zinc-based layer
    • 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/40—Coatings including alternating layers following a pattern, a periodic or defined repetition
    • C23C28/42—Coatings including alternating layers following a pattern, a periodic or defined repetition characterized by the composition of the alternating layers
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/10—Electroplating with more than one layer of the same or of different metals
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/60—Electroplating characterised by the structure or texture of the layers
    • C25D5/625—Discontinuous layers, e.g. microcracked layers
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C21D1/673—Quenching devices for die quenching
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/48—After-treatment of electroplated surfaces
    • C25D5/50—After-treatment of electroplated surfaces by heat-treatment

Definitions

  • the invention relates to a method for producing a corrosion protection coating for hardenable steel sheets and a corrosion protection layer for hardenable steel sheets.
  • a steel strip is produced from a steel material by hot rolling and usually also subsequent cold rolling and the steel strip is subsequently continuously galvanized.
  • the usual galvanizing in this case is the hot dip galvanizing, in which the steel strip is passed through a trough with liquid zinc, wherein the liquid zinc adheres to the steel, the galvanized steel strip is usually conveyed vertically from the trough and then superfluous zinc is stripped with Abstreiferdüsen and the tape then optionally subjected to a heat treatment.
  • the galvanized steel strip thus produced is then usually placed in coils, i. wound up.
  • the boards are formed in a conventional manner in a multi-stage process, and in particular deep-drawn until the component is molded in its final appearance.
  • the component is formed smaller in all three spatial directions about 2% smaller, to take into account a subsequent thermal expansion.
  • this sheet metal component is heated to an austenitizing temperature, ie a temperature above Ac 3 and optionally held until the steel material is present in the austenitic phase.
  • the heated sheet steel component is transferred to a mold hardening tool and held in the mold hardening tool, in which the heated sheet steel component is usually used form-fitting, pressed by a die and a male part, but not substantially reshaped.
  • the steel component Due to the abutment of the die and the male part, which may also be cooled, the steel component is cooled at a speed above the critical hardening rate, resulting in a transformation of the austenite substantially to martensite and results in a high hardness of the component.
  • the board is heated directly to a temperature required for curing above Ac 3 and optionally held and then formed in a tool consisting of female and male in a single-stage stroke and cooled simultaneously by the concern of the tool on the workpiece so quickly that the curing outlined above occurs.
  • This process is called press hardening.
  • Form hardening is superior to press hardening in terms of the possible geometries of a component, since more complicated or more complex spatial forms can be realized in a multi-stage forming process, wherein only comparatively simple geometries can be produced during single-stage forming press hardening.
  • Example 5 discloses a steel plate having a first layer of zinc or a zinc alloy and a second layer of nickel or cobalt. The first layer is over a melt immersion method, wherein the second layer is electrodeposited.
  • the EP 2 602 359 A1 relates to press hardening of coated steels, wherein the steels are coated from nickel and a zinc-nickel layer, wherein both layers are applied electrolytically.
  • WO 2005/021820 A1 is a press hardening of boards of a hardenable steel alloy and in particular a 22MnB5 known, wherein the board may be formed with an electrodeposited zinc layer and a second layer of an oxygen-affine element.
  • From the DE 10 2010 030 465 A1 is a method for producing a provided with a corrosion protection coating and formed of a high-strength sheet steel material formed sheet metal part known.
  • This method comprises the steps of forming a provided starting sheet material to a sheet metal part, forming the anti-corrosion coating by electrolytic application of a zinc-nickel coating on the sheet metal part, wherein at the beginning of the coating process First, a thin nickel layer is deposited, which further prevents hydrogen embrittlement of the steel sheet material.
  • a hot-formed and in particular press-hardened sheet metal part made of a high-strength sheet steel material with an electrolytically applied zinc-nickel coating is known from this. The purpose of this is to provide the nickel layer as a barrier to hydrogen typically introduced into the steel sheet material during electrolytic plating.
  • the EP 0 364 596 B1 relates to a process for the production of zinc-nickel alloy-coated thin sheets with good Pressverformeigenschaften, wherein the formability of such sheets is to be improved by a zinc-nickel alloy coating.
  • the layer is to be deposited with about 30 g / m 2 and a nickel content of 12.5%.
  • the object of the invention is to provide a method for producing hardened sheet steel components.
  • a multilayer anticorrosion layer is produced on a steel sheet, wherein either a very thin nickel layer of 1 .mu.m is deposited electrolytically on the steel and then a zinc layer is likewise deposited electrolytically on the nickel layer, or the thin nickel layer is formed on the steel sheet via an electrolytic deposition and then a zinc layer is applied via hot dip galvanizing.
  • a nickel-containing layer is applied to a normal hot-dip galvanized sheet steel strip via a corresponding after-treatment (coater).
  • the nickel layer has a thickness of approximately 1 ⁇ m when applied as the first layer by means of electrolytic deposition.
  • the outer nickel-containing layer is about 250 nm to 700 nm thick.
  • the nickel in no form forms a barrier against the ingress of liquid zinc to the steel, but rather the nickel reacts very quickly with the zinc and also with iron. that the melting point of the entire corrosion protection layer increases sharply, since instead of zinc-iron- ⁇ -phases zinc-nickel-iron phases are increasingly formed, which have a much higher melting point. This achieves that at the temperatures that are hot worked and quench hardened, there are no liquid phases that could interact with the austenite. This is also the reason why, according to the invention, an externally applied nickel layer acts in a comparable manner, with the nickel which is deposited on the outermost surface diffusing into the corrosion protection layer so rapidly that the increase in the melting point is ensured.
  • nickel instead of nickel, or layers based on nickel, other elements which form intermetallic-less noble phases with Zn or Fe and have a higher oxidation potential than Zn, such as Cu, Co, Mn or Mo, may be used, since manganese, Molybdenum, cobalt and copper the same effects can be achieved. "Based on” here means that these elements predominantly (> 50 wt .-%) are included, but other elements are present as alloying elements. Both nickel and cobalt as well as manganese or copper do not act as a physical barrier against the diffusion of zinc and iron, but are dissolved and incorporated into the molten zinc and zinc-iron phases. In the case of a previously applied nickel layer and subsequent hot-dip galvanizing, the nickel is at least already dissolved by the zinc melt during galvanizing.
  • phase structure forms a similar phase structure of the layer as in pure hot-dip galvanized layers (phs-Ultraform), but this phase structure is zinc-rich or has a greater proportion of ⁇ phases. That these phases are more zinc-rich, is advantageous for the cathodic corrosion protection performance of the layer.
  • the method according to the invention for producing sheet steel components may be either a press hardening method or a shape hardening method, that is, a method in which a sheet steel member is heated and then quench hardened in a tool (mold hardening), or a method in which a board is single stage formed and quench hardened (press hardening).
  • a boron-manganese steel is used as the steel material for press-hardening or mold-hardening, in which, with regard to the transformation of the austenite into other phases, the transformation can shift into deeper regions and martensite is formed.
  • the alloying elements boron, manganese, carbon and optionally chromium and molybdenum are present.
  • steel assemblies have proved to be suitable as follows (all figures in weight percent): Carbon (C) from 0.08 to 0.34 Manganese (Mn) 1.00-3.00 Aluminum (Al) 0.03-0.06 Silicon (Si) 0.01-0.20 Chrome (Cr) 0.02-0.3 Titanium (Ti) 0.03-0.04 Nitrogen (N) ⁇ 0.007 Boron (B) 0.002-0.006 Phosphorus (P) ⁇ 0.01 Sulfur (S) ⁇ 0.01 Molybdenum (Mo) ⁇ 1
  • the conventional steels 22MnB5 or 20MnB8 are suitable.
  • a corrosion protection layer according to the invention is a multilayer corrosion protection layer, wherein a plurality of nickel layers and a plurality of zinc layers are applied to a substrate of a hardenable steel material. Instead of a nickel layer, a manganese or copper layer can also be applied.
  • the nickel, copper or manganese layer is preferably applied electrolytically.
  • the zinc layer can be applied electrolytically or by a hot dip process.
  • Another possibility is to apply the zinc layer as a first layer electrolytically or by hot dip method and then apply a nickel layer thereon to the outermost surface and in particular to deposit it electrolytically.
  • nickel refers to other elements that form intermetallic-less noble phases with Zn or Fe and have a higher oxidation potential than Zn, such as Cu, Co, Mn, or Mo.
  • the element nickel is hereby also used for copper and manganese.
  • Fig. 1 One recognizes a light-microscopic etched cut representation of a layer on a steel substrate. In Fig. 2 this is shown enlarged again.
  • a 1 micron thick nickel intermediate layer is first applied to the steel substrate and then hot-dip galvanized, wherein the hot dip galvanizing the nickel intermediate layer was dissolved in the zinc bath.
  • a two-phase structure with a light phase which is interspersed with dark areas, is formed on the surface of the steel substrate ( Fig. 6 ). This was annealed at 870 ° C in a 1 micron thick intermediate nickel layer, then was waited for 45 s, added a transfer time of 5 s and then a cooling in a press.
  • Fig. 6 One shift after Fig. 6 was measured with an EDX element distribution, whereby here too a nickel support layer is present as a preparation aid on the sample.
  • the slice cut that was measured is in Fig. 7 shown.
  • Zinc shows that it is highly enriched in the light phase, while it is present in much lower concentrations in the dark areas, so that apparently there is an iron-rich phase as nodules or roundish accumulation in a zinc matrix.
  • the nickel ( Fig. 10 ) is still very weakly recognizable in the bright zinc matrix, but is obviously not present in the iron-rich nodules, whereas aluminum ( Fig. 11 ) is distributed relatively evenly throughout the layer, albeit with enrichments in the iron-rich phases.
  • Manganese which is present in the base steel material, is scarcely present in the entire layer and can only be detected in the substrate.
  • the element distribution was measured in depth with a so-called EDX line scan ( Fig. 13 ).
  • the scan already starts in the nickel backing layer and goes deep into the steel base material.
  • the result is as in Fig. 14 you can see a corresponding distribution of the elements.
  • the nickel peak is initially close to 100%, which is because the scan already starts in the nickel preparation layer. Subsequently, the nickel content drops, and it can be seen that the nickel content is significantly lower in the dark iron-rich zones than in the bright zinc-rich phases. Accordingly, starting from the outer one Surface iron content is very low and is about 10% and increases significantly in the dark iron-rich phase, to then reach its maximum in the steel matrix.
  • the content of iron is inversely related to the zinc content, which was to be expected according to the two-phase formation.
  • the invention thus makes it possible to influence the corrosion protection layer based on zinc via an additional nickel layer, such that this layer evidently forms faster solid phases during cooling, which then do not react with the austenite of the steel substrate during forming.
  • the invention Compared with a zinc-nickel layer deposited uniformly via electrolysis, the invention has the advantage that it allows a mixed application in electrolytic and hot-dip coating processes. Furthermore, the nickel layer can be easily applied to conventional, already hot-dip galvanized sheets, for which purpose both electrolytic coatings can be used as well as other coating methods, for. B. roll application, i. a roll coating method, such as a coil coating method, in which a nickel-containing layer having a thickness of 250 nm to 700 nm is applied.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Electrochemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Coating With Molten Metal (AREA)
  • Electroplating Methods And Accessories (AREA)

Claims (16)

  1. Procédé de production de composants en tôle d'acier trempés, sachant que, sur une bande composée d'un alliage d'acier trempable, au moins deux couches de métal sont successivement déposées comme revêtement anticorrosion sur le substrat d'acier, sachant que l'une couche de métal est une couche de zinc ou à base de zinc et l'autre couche est une couche composée d'un métal qui forme avec le Zn ou le Fe des phases intermétalliquement moins nobles et présente un potentiel d'oxydation supérieur à celui du Zn, soit du Ni, du Cu, du Co, du Mn ou du Mo, ou est une couche à base de ces métaux et sachant que des aciers de la composition d'alliage générale, respectivement en pour cent de poids : carbone (C) 0,08-0,6 manganèse (Mn) 0,8-3,0 aluminium (Al) 0,01-0,07 silicium (Si) 0,01-0,5 chrome (Cr) 0,02-0,6 titane (Ti) 0,01-0,08 azote (N) < 0,02 bore (B) 0,002-0,02 phosphore (P) < 0,01 soufre (S) < 0,01 molybdène (Mo) < 1
    reste de fer et d'impuretés liées à la fusion
    sont utilisés, sachant que des platines sont estampées à partir de la bande dotée du revêtement anticorrosion et soit les platines sont
    - chauffées et éventuellement maintenues à une température > Ac3 puis déformées et trempées dans un outil de trempe à la presse pour générer le composant en tôle d'acier, soit
    - les platines sont déformées à froid en un composant en tôle d'acier puis le composant en tôle d'acier est chauffé à une température > Ac3 et trempé dans un outil de trempe par formage, sachant que la succession de couches entre nickel, cuivre et manganèse d'un côté et zinc ou à base de zinc de l'autre côté est appliquée de manière répétée.
  2. Procédé selon la revendication 1, caractérisé en ce que, comme matériau d'acier, un matériau ayant la composition d'alliage ci-après, l'indication étant respectivement en pour cent de poids, est utilisé : carbone (C) 0,08-0,34 manganèse (Mn) 1,00-3,00 aluminium (Al) 0,03-0,06 silicium (Si) 0,01-0,20 chrome (Cr) 0,02-0,3 titane (Ti) 0,03-0,04 azote (N) < 0,007 bore (B) 0,002-0,006 phosphore (P) < 0,01 soufre (S) < 0,01 molybdène (Mo) < 1
    reste de fer et d'impuretés liées à la fusion.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la couche de zinc ou à base de zinc est appliquée par électrolyse ou par un procédé d'immersion dans un bain en fusion.
  4. Procédé selon la revendication 1 à 3, caractérisé en ce que la couche de nickel, de cuivre ou de manganèse est appliquée par électrolyse ou par un procédé d'application au rouleau, par exemple un procédé de revêtement en continu (coil coating).
  5. Procédé selon l'une des revendications précédentes, caractérisé en ce que la couche de nickel, de cuivre ou de manganèse est appliquée avec une épaisseur de 0,5 µm à 2 µm en cas de dépôt électrolytique ou de 250 nm à 700 nm en cas d'application au rouleau, en particulier de procédé de revêtement en continu.
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce que la couche de zinc ou la couche à base de zinc est déposée avec une épaisseur de 6 µm à 30 µm.
  7. Procédé selon l'une des revendications précédentes, caractérisé en ce que la couche de nickel, de cuivre ou de manganèse est d'abord déposée sur le substrat d'acier, puis la couche de zinc ou le revêtement à base de zinc est déposé dessus.
  8. Procédé selon l'une des revendications précédentes, caractérisé en ce que le revêtement en zinc ou à base de zinc est appliqué sur la couche de nickel, de cuivre ou de manganèse par électrolyse ou par zingage par immersion dans un bain en fusion.
  9. Procédé selon l'une des revendications précédentes, caractérisé en ce que la couche de zinc ou à base de zinc est d'abord appliquée sur le substrat d'acier par électrolyse ou par procédé de revêtement par immersion dans un bain en fusion, puis la couche de nickel est appliquée par électrolyse sur la couche de zinc ou par un procédé d'application au rouleau, par exemple un procédé de revêtement en continu, sur la couche de zinc.
  10. Matériau de protection anticorrosion destiné à être utilisé dans un procédé selon l'une des revendications 1 à 10, sachant que la couche de protection anticorrosion comporte au moins deux couches, sachant qu'une couche en nickel, en cuivre ou en manganèse est présente et une couche de zinc ou à base de zinc est présente dessus ou dessous, sachant qu'une succession multiple des couches de nickel, de cuivre et de manganèse d'un côté et du zinc ou des couches à base de zinc de l'autre côté est présente sur le substrat d'acier.
  11. Matériau de protection anticorrosion selon la revendication 10, caractérisé en ce que la couche de zinc ou à base de zinc est déposée par électrolyse ou par un procédé d'immersion dans un bain en fusion.
  12. Matériau de protection anticorrosion selon la revendication 10 ou 11, caractérisé en ce que la couche de zinc, de cuivre ou de manganèse est appliquée par électrolyse ou par un procédé d'application au rouleau, par exemple un procédé de revêtement en continu (coil coating).
  13. Matériau de protection anticorrosion selon l'une des revendications 10 à 12, caractérisé en ce que la couche de nickel, de cuivre ou de manganèse présente une épaisseur de 0,5 µm à 2 µm en cas de dépôt électrolytique ou de 250 nm à 700 nm en cas de procédé d'application au rouleau, en particulier de procédé de revêtement en continu.
  14. Matériau de protection anticorrosion selon l'une des revendications 10 à 13, caractérisé en ce que la couche de zinc ou la couche à base de zinc présente une épaisseur de 6 µm à 30 µm.
  15. Matériau de protection anticorrosion selon l'une des revendications 10 à 14, caractérisé en ce que la couche de nickel, de cuivre ou de manganèse est disposée sur le substrat d'acier et la couche de zinc ou le revêtement à base de zinc est disposée par-dessus.
  16. Matériau de protection anticorrosion selon l'une des revendications 10 à 15, caractérisé en ce qu'une couche de zinc ou un revêtement à base de zinc qui a été déposé par électrolyse ou par revêtement par immersion dans un bain en fusion est disposé sur le substrat d'acier, et la couche de nickel est disposée sur la couche de zinc, sachant que la couche de nickel est appliquée par électrolyse ou par un procédé d'application au rouleau, en particulier un procédé de revêtement en continu.
EP15791573.7A 2014-11-04 2015-11-04 Procédé de production d'un revêtement anti-corrosion pour tôles d'acier trempables et revêtement anti-corrosion pour tôles d'acier trempables Active EP3215656B1 (fr)

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DE102014116085 2014-11-04
PCT/EP2015/075702 WO2016071399A1 (fr) 2014-11-04 2015-11-04 Procédé de production d'un revêtement anti-corrosion pour tôles d'acier trempables et revêtement anti-corrosion pour tôles d'acier trempables

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EP3215656B1 true EP3215656B1 (fr) 2019-10-16

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JP6880690B2 (ja) * 2016-12-07 2021-06-02 日本製鉄株式会社 溶融Ｚｎ−Ａｌ−Ｍｇ系めっき鋼板および溶融Ｚｎ−Ａｌ−Ｍｇ系めっき鋼板の製造方法
WO2019171157A1 (fr) * 2018-03-09 2019-09-12 Arcelormittal Procédé de fabrication de pièces durcies à la presse à productivité élevée
DE102018128131A1 (de) 2018-11-09 2020-05-14 Thyssenkrupp Ag Gehärtetes Bauteil umfassend ein Stahlsubstrat und eine Korrosionsschutzbeschichtung, entsprechendes Bauteil zur Herstellung des gehärteten Bauteils sowie Herstellverfahren und Verwendung
DE102018009745A1 (de) 2018-12-14 2020-06-18 Salzgitter Flachstahl Gmbh Blechplatine zur Hertstellung eines warmumgeformten und pressgehärteten Stahlblechbauteils sowie Warmumformverfahren
EP3712292B1 (fr) 2019-03-19 2023-08-02 ThyssenKrupp Steel Europe AG Composant comprenant un substrat en acier, une couche de revêtement intermédiaire et une couche protection contre la corrosion, leur procédé de fabrication
DE102019113117B4 (de) * 2019-05-17 2023-12-28 voestalpine eifeler Vacotec GmbH Verfahren zum Herstellen eines Kaltumformwerkzeugs sowie Kaltumformwerkzeug
CN111434402A (zh) * 2019-07-30 2020-07-21 苏州普热斯勒先进成型技术有限公司 表面具有含锰涂层的热冲压件的制造方法
WO2021084304A1 (fr) * 2019-10-30 2021-05-06 Arcelormittal Procédé d'emboutissage à chaud
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EP3215656A1 (fr) 2017-09-13
DE102015118869A1 (de) 2016-05-04
WO2016071399A1 (fr) 2016-05-12
US20170321314A1 (en) 2017-11-09

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