EP2839049B1 - Stahlblech mit kathodischen schutz beschichtung und herstellungsverfahren eines artikels davon - Google Patents

Stahlblech mit kathodischen schutz beschichtung und herstellungsverfahren eines artikels davon Download PDF

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Publication number
EP2839049B1
EP2839049B1 EP12722750.2A EP12722750A EP2839049B1 EP 2839049 B1 EP2839049 B1 EP 2839049B1 EP 12722750 A EP12722750 A EP 12722750A EP 2839049 B1 EP2839049 B1 EP 2839049B1
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EP
European Patent Office
Prior art keywords
weight
coating
cathodic protection
sacrificial cathodic
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.)
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Application number
EP12722750.2A
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English (en)
French (fr)
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EP2839049A1 (de
Inventor
Christian Allely
Julie Chassagne
Beril CORLU
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ArcelorMittal SA
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ArcelorMittal SA
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Application filed by ArcelorMittal SA filed Critical ArcelorMittal SA
Priority to PL12722750T priority Critical patent/PL2839049T3/pl
Priority to SI201231186T priority patent/SI2839049T1/en
Priority to HUE12722750A priority patent/HUE037303T2/hu
Priority to RS20171316A priority patent/RS56715B1/sr
Priority to PT127227502T priority patent/PT2839049T/pt
Publication of EP2839049A1 publication Critical patent/EP2839049A1/de
Application granted granted Critical
Publication of EP2839049B1 publication Critical patent/EP2839049B1/de
Priority to HRP20171855TT priority patent/HRP20171855T1/hr
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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
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
    • C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
    • C23F13/12—Electrodes characterised by the material
    • C23F13/14—Material for sacrificial anodes
    • 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
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C—CHEMISTRY; METALLURGY
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/001—Heat treatment of ferrous alloys containing Ni
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/002—Heat treatment of ferrous alloys containing Cr
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
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    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/005—Heat treatment of ferrous alloys containing Mn
    • C—CHEMISTRY; METALLURGY
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    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/008—Heat treatment of ferrous alloys containing Si
    • 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
    • C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
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    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • C—CHEMISTRY; METALLURGY
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    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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    • C22C38/00—Ferrous alloys, e.g. steel alloys
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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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    • C23C2/12—Aluminium or alloys based thereon
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    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
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    • C21D1/673—Quenching devices for die quenching
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    • 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
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    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals

Definitions

  • the present invention relates to a steel sheet provided with a sacrificial cathodic protection coating, more particularly intended for the manufacture of automotive parts, without being limited thereby.
  • EP1 225 246 discloses a steel sheet provided with a sacrificial cathodic protection coating having an iron content lower than that of the present invention.
  • the present invention therefore aims to overcome the disadvantages of the coatings of the prior art by providing coated steel sheets having a reinforced protection against corrosion, before and after implementation by stamping, in particular.
  • coated steel sheets having a reinforced protection against corrosion, before and after implementation by stamping, in particular.
  • the sheets are intended to be hardened in press, in particular hot-stamped, it also seeks a resistance to the propagation of microcracks in the steel and, preferably, a window of the widest possible use in time and temperature during the heat treatment preceding the curing in press.
  • the subject of the invention is a steel sheet provided with a sacrificial cathodic protection coating as described in claim 1.
  • the thickness of the primer coating is greater than or equal to 27 microns, its tin content is greater than or equal to 1% by weight and its zinc content is greater than or equal to 20% by weight.
  • Another subject of the invention consists of a part provided with a sacrificial cathodic protection coating obtainable by the method according to the invention or by cold stamping of a sheet according to the invention, and which is more particularly intended for the automotive industry.
  • the invention relates to a steel sheet provided with a coating first of all necessarily comprising a protective element to be chosen from tin, indium, and combinations thereof.
  • tin in a percentage of between 0.1% and 5%, preferably between 0.5% and 4% by weight, more particularly preferably between 1 and 3%. % by weight or between 1 and 2% by weight.
  • indium which has a stronger protective power than tin. It may be used alone or in addition to tin, at contents of between 0.01 and 0.5%, preferably between 0.02 and 0.1% and more preferably between 0.05 and 0.1% by weight.
  • the coatings of the sheets according to the invention also comprise from 5 to 50% by weight of zinc and optionally up to 10% of magnesium.
  • the present inventors have found that these elements make it possible, in combination with the protection elements mentioned above, to reduce the electrochemical potential of the coating with respect to the steel, in media containing or not containing chloride ions.
  • the coatings according to the invention thus have sacrificial cathodic protection.
  • zinc whose protective effect is greater than that of magnesium and which is simpler to implement because less oxidizable.
  • the coatings of the sheets according to the invention also comprise from 0.1 to 15%, preferably from 0.5 to 15% and more preferably from 1 to 15%, or even from 8 to 12% by weight of silicon, element which makes it possible in particular to give the sheets high resistance to oxidation at high temperature.
  • silicon allows their use up to 650 ° C without risk of flaking coating.
  • silicon can prevent the formation of a thick layer of iron-zinc intermetallic during a hot dip coating, intermetallic layer that reduces the adhesion and formability of the coating.
  • the presence of a silicon content greater than 8% by weight makes them more particularly capable of being hardened in press and in particular to be shaped by hot stamping. It is preferred to use for this purpose a quantity of between 8 and 12% of silicon. A content greater than 15% by weight is undesirable since primary silicon is formed which could degrade the properties of the coating, in particular the properties of corrosion resistance.
  • the coatings of the sheets according to the invention can also comprise, in aggregated contents, up to 0.3% by weight, preferably up to 0.1% by weight, or even less than 0.05% by weight of elements. additional such as Sb, Pb, Ti, Ca, Mn, La, Ce, Cr, Ni, Zr or Bi. These various elements may allow, among other things, to improve the corrosion resistance of the coating or its fragility or adhesion, for example. Those skilled in the art who know their effects on the characteristics of the coating will be able to use them according to the complementary aim sought, in the proportion adapted for this purpose which will generally be between 20 ppm and 50 ppm. It was further verified that these elements did not interfere with the main properties sought in the context of the invention.
  • the coatings of the sheets according to the invention also comprise unavoidable residual elements and impurities resulting, in particular, from the pollution of hot-dip galvanizing baths by the passage of steel strips or impurities originating from ingots feeding the same baths. or ingots of vacuum deposition processes.
  • the residual element may be iron which is present in amounts ranging from 2 to 5% by weight and in general from 2 to 4% by weight in the hot dip coating baths.
  • the coatings of the sheets according to the invention comprise fi nally aluminum whose content may range from about 20% to about 90% by weight.
  • This element makes it possible to provide protection against corrosion of the plates by a barrier effect. It increases the melting temperature and the evaporation temperature of the coating, thus making it possible to implement it more easily, in particular by hot stamping and in a wide range of time and temperature. This may be particularly interesting when the composition of the steel of the sheet and / or the final microstructure referred to for the part require to pass through austenitization at high temperature and / or for long periods.
  • the coating may be predominantly composed of zinc or aluminum.
  • the thickness of the coating will preferably be between 10 and 50 ⁇ m. Indeed, below 10 microns, protection against corrosion of the band might be insufficient. Above 50 ⁇ m corrosion protection exceeds the required level, especially in the automotive field. In addition, if a coating of such thickness is subjected to a significant rise in temperature and / or for long periods, it may melt in the upper part and come to flow on the oven rolls or in the stamping tools , which would deteriorate them.
  • the nature of it is not critical as long as the coating can adhere sufficiently.
  • the steel has a composition that allows the part to reach a tensile strength of 500 to 1600 MPa, depending on the conditions. of use.
  • a steel composition comprising, in% by weight: 0.15% ⁇ C ⁇ 0.5%, 0.5% ⁇ Mn ⁇ 3%, 0.1% ⁇ If ⁇ 0.5%, Cr ⁇ 1%. Ni ⁇ 0.1%, Cu ⁇ 0.1%, Ti ⁇ 0.2%, Al ⁇ 0.1%, P ⁇ 0.1%, S ⁇ 0.05%, 0.0005% ⁇ B ⁇ 0 , 08%, the balance being iron and unavoidable impurities from the development of steel.
  • An example of a commercially available steel is 22MnB5.
  • a steel composition comprising: 0.040% ⁇ C ⁇ 0.100%, 0.80% ⁇ Mn ⁇ 2.00%, Si ⁇ 0.30 %, S ⁇ 0.005%, P ⁇ 0.030%, 0.010% ⁇ Al ⁇ 0.070%, 0.015% ⁇ Nb ⁇ 0.100%, 0.030% ⁇ Ti ⁇ 0.080%, N ⁇ 0.009%, Cu ⁇ 0.100%, Ni ⁇ 0.100% , Cr ⁇ 0.100%, Mo ⁇ 0.100%, Ca ⁇ 0.006%, the remainder being iron and unavoidable impurities resulting from the production of steel.
  • the steel sheets can be made by hot rolling and can optionally be re-cold rolled, depending on the final thickness referred to, which can vary, for example, between 0.7 and 3 mm.
  • They may be coated by any suitable means such as an electroplating process or by a deposition process under vacuum or under pressure close to atmospheric pressure, such as deposition by magnetron sputtering, by cold plasma or by evaporation under vacuum, for example, but it will be preferred to obtain them by a hot dipping method in a molten metal bath. It is observed that the superficial cathodic protection is more important for coatings obtained by hot quenching than for coatings obtained by other coating processes.
  • the sheets according to the invention can then be shaped by any method adapted to the structure and shape of the parts to be manufactured, such as for example cold stamping.
  • the sheets according to the invention are more particularly suitable for the manufacture of hardened parts in press, in particular by hot stamping.
  • This method consists of supplying a steel sheet according to the previously coated invention, then cutting the sheet to obtain a blank.
  • This blank is then heated in an oven under a non-protective atmosphere to an austenitization temperature Tm of between 840 and 950 ° C, preferably between 880 and 930 ° C, and then to keep the blank at this temperature Tm for a duration tm between 1 and 8 minutes, preferably between 4 and 6 minutes.
  • the temperature Tm and the holding time tm depend on the nature of the steel but also on the thickness of the sheets to be stamped, which must be entirely in the austenitic field before they are shaped.
  • the speed of rise in temperature also affects these parameters, a high speed (greater than 30 ° C / s for example) to also reduce the holding time tm.
  • the blank is then transferred to a hot stamping tool and then stamped.
  • the resulting part is then cooled either in the stamping tool itself or after transfer to a specific cooling tool.
  • the cooling rate is in all cases controlled according to the composition of the steel, so that its final microstructure after the hot stamping comprises at least one component selected from martensite and bainite, in order to achieve the desired level of mechanical strength.
  • An essential point to ensure that the hot-stamped and hot-stamped part will indeed have a sacrificial cathodic protection is to regulate the temperature Tm, the time tm, the thickness of the preliminary coating and its contents of element (s) of protection, zinc and optionally magnesium such that the final average iron content in the upper part of the coating of the part is less than 75% by weight, preferably less than 50% by weight or even less than 30% by weight.
  • This upper part has a thickness of at least 5 microns.
  • the temperature Tm and / or the holding time tm it is possible to limit the temperature Tm and / or the holding time tm. It is also possible to increase the thickness of the pre-coating to prevent the diffusion front of the iron from reaching the surface of the coating. In this respect, it is preferable to use a sheet having a pre-coating thickness greater than or equal to 27 ⁇ m, preferably greater than or equal to 30 ⁇ m or even 35 ⁇ m.
  • Tests were carried out with cold-rolled 22MnB5 sheets of thickness 1.5 mm, provided with hot-dip coatings comprising in% by weight, 20% of zinc, 10% of silicon, 3% of iron, 0 , 1% indium, the rest being made of aluminum and unavoidable impurities, and whose thicknesses are about 15 microns.
  • the electrochemical potential of the coated sheet is -0.95 V / ECS.
  • the sheet according to the invention thus has a sacrificial cathodic protection. Under the same conditions of measurement, it has been verified that an identical plate but provided with a coating comprising neither zinc nor indium has an electrochemical potential of -0.70 V / SCE, which does not provide cathodic protection to steel.
  • Tests were carried out with cold-rolled sheets of 22MnB5 of thickness 1.5 mm, provided with hot-dip coatings comprising in% by weight, 10% of silicon, 10% of zinc, 6% of magnesium, % iron and 0.1% tin, the rest being made of aluminum and unavoidable impurities, and whose thicknesses are on average 17 microns.
  • the electrochemical potential of the coated sheet is -0.95 V / SCE, while the electrochemical potential of an identical sheet provided with a coating comprising 10% silicon, the rest being made of aluminum and aluminum. unavoidable impurities, is -0.70 V / ECS.
  • the sheet according to the invention thus has a sacrificial cathodic protection.

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Claims (13)

  1. Stahlblech, welches versehen ist mit einer kathodischen Opfer-Schutzbeschichtung, welche von 5 bis 50 Gew.-% an Zink, 0,1 bis 15 Gew.-% an Silizium und eventuell bis zu 10 Gew.-% an Magnesium und bis zu 0,3 Gew.-%, in kumulierten Gehalten, an zusätzlichen Elementen aufweist und ferner ein Schutzelement aufweist, welches aus Zinn in einem Gewichtsprozentsatz, der zwischen 0,1% und 5%, Indium in einem Gewichtsprozentsatz, der zwischen 0,01% und 0,5% liegt, und deren Kombinationen auszuwählen ist, wobei der Rest gebildet ist aus Aluminium und aus Restelementen, darunter 2 bis 5 Gew.-% Eisen, oder aus unvermeidbaren Verunreinigungen.
  2. Stahlblech, welches mit einer kathodischen Opfer-Schutzbeschichtung versehen ist, gemäß dem Anspruch 1, worin das Schutzelement Zinn in einem Gewichtsprozentsatz, der zwischen 1% und 3% liegt, ist.
  3. Stahlblech, welches mit einer kathodischen Opfer-Schutzbeschichtung versehen ist, gemäß dem Anspruch 1, wobei das Schutzelement Indium in einem Gewichtsprozentsatz, der zwischen 0,02% und 0,1% liegt, ist.
  4. Stahlblech, welches mit einer kathodischen Opfer-Schutzbeschichtung versehen ist, gemäß irgendeinem der Ansprüche 1 bis 3, bei welchem die Beschichtung 20 bis 40 Gew.-% Zink und eventuell Magnesium in einem Gehalt von 1 bis 10 Gew.-% aufweist.
  5. Stahlblech, welches mit einer kathodischen Opfer-Schutzbeschichtung versehen ist, gemäß dem Anspruch 4, bei welchem die Beschichtung 20 bis 30 Gew.-% an Zink und eventuell Magnesium in einem Gehalt von 3 bis 6 Gew.-% aufweist.
  6. Stahlblech, welches mit einer kathodischen Opfer-Schutzbeschichtung versehen ist, gemäß irgendeinem der Ansprüche 1 bis 5, bei welchem die Beschichtung 8 Gew.-% bis 12 Gew.-% an Silizium aufweist.
  7. Stahlblech, welches mit einer kathodischen Opfer-Schutzbeschichtung versehen ist, gemäß irgendeinem der Ansprüche 1 bis 6, bei welchem der Stahl, in Gewichtsprozenten, 0,15% < C < 0,5%, 0,5% < Mn < 3%, 0,1% < Silizium < 0,5%, Cr < 1%, Ni < 0,1%, Cu < 0,1%, Ti < 0,2%, Al < 0,1%, P < 0,1 %, S < 0,05%, 0,0005% < B < 0,08% aufweist, wobei der Rest aus Eisen und aus unvermeidbaren Verunreinigungen, welche aus der Bearbeitung des Stahls herrühren, gebildet ist.
  8. Stahlblech, welches mit einer kathodischen Opfer-Schutzbeschichtung versehen ist, gemäß irgendeinem der Ansprüche 1 bis 7, wobei die Beschichtung eine Dicke, welche zwischen 10 und 50 µm liegt, aufweist.
  9. Stahlblech, welches mit einer kathodischen Opfer-Schutzbeschichtung versehen ist, gemäß irgendeinem der Ansprüche 1 bis 8, bei welchem die Beschichtung mittels Heißtauchens erlangt wird.
  10. Verfahren zur Herstellung eines Teils aus Stahl, welches mit einer kathodischen Opfer-Schutzbeschichtung versehen ist, aufweisend die folgenden Schritte, welche in dieser Reihenfolge durchgeführt werden und darin bestehen:
    - ein im Voraus beschichtetes Stahlblechs gemäß irgendeinem der Ansprüche 1 bis 9 bereitzustellen, dann
    - das Blech zu zerschneiden, um einen Rohling zu erhalten, dann
    - den Rohling unter einer nichtschützenden Atmosphäre bis zu einer Austenitisierungstemperatur Tm, welche zwischen 840 und 950°C liegt, zu erhitzen, dann
    - den Rohling auf dieser Temperatur Tm während einer Dauer tm, die zwischen 1 und 8 Minuten liegt, zu halten, dann
    - den Rohling warmtiefzuziehen, um ein Teil aus beschichteten Stahl zu erhalten, wobei man dieses mit einer Geschwindigkeit abkühlt, so dass die Mikrostruktur des Stahls mindestens einen Bestandteil, welcher aus dem Martensit und dem Bainit ausgewählt ist, aufweist,
    - wobei die Temperatur Tm, die Zeit tm, die Dicke der vorherigen Beschichtung und deren Gehalte an Schutzelement, an Zink und eventuell an Magnesium derart ausgewählt sind, dass der finale Durchschnittsgehalt an Eisen in dem oberen Abschnitt der Beschichtung des besagten Teils geringer als 75 Gew.-% wird.
  11. Verfahren gemäß dem Anspruch 10, bei welchem die Dicke der vorherigen Beschichtung größer oder gleich 27 µm ist, ihr Gehalt an Zinn größer oder gleich 1 Gew.-% ist und ihr Gehalt an Zink größer oder gleich 20 Gew.-% ist.
  12. Mit einer kathodischen Opfer-Schutzbeschichtung versehenes Teil aus Metall, welches durch das Verfahren gemäß den Ansprüchen 10 oder 11 erhältlich ist.
  13. Mit einer kathodischen Opfer-Schutzbeschichtung versehenes Teil aus Metall, welches durch Kalttiefziehen eines Blechs gemäß irgendeinem der Ansprüche 1 bis 9 erhältlich ist.
EP12722750.2A 2012-04-17 2012-04-17 Stahlblech mit kathodischen schutz beschichtung und herstellungsverfahren eines artikels davon Active EP2839049B1 (de)

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PL12722750T PL2839049T3 (pl) 2012-04-17 2012-04-17 Blacha stalowa zaopatrzona w katodową protektorową powłokę ochronną, sposób produkcji wyrobu przez zastosowanie takiej blachy i wyrób tak otrzymany
SI201231186T SI2839049T1 (en) 2012-04-17 2012-04-17 Steel sheet, equipped with a cathodic protective sacrificial lining, a process for the manufacture of a product using such sheet metal and the resulting piece
HUE12722750A HUE037303T2 (hu) 2012-04-17 2012-04-17 Acéllemez elfogyó katódos védõbevonattal és eljárás abból egy tárgy elõállítására
RS20171316A RS56715B1 (sr) 2012-04-17 2012-04-17 Čelični lim sa žrtvenom katodnom zaštitnom prevlakom i postupak za izradu proizvoda polazeći od tog čeličnog lima
PT127227502T PT2839049T (pt) 2012-04-17 2012-04-17 Chapa de aço dotada com um revestimento de proteção catódica sacrificial, método de fabrico de uma peça utilizando uma tal chapa e peça resultante
HRP20171855TT HRP20171855T1 (hr) 2012-04-17 2017-11-28 Čelični lim s žrtvenom katodnom zaštitnom prevlakom i postupak za izradu proizvoda počevši od navedenog čeličnog lima

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PCT/FR2012/000149 WO2013156688A1 (fr) 2012-04-17 2012-04-17 Tôle d'acier munie d'un revêtement à protection cathodique sacrificielle, procédé de fabrication d'une pièce par mise en oeuvre d'une telle tôle et pièce ainsi obtenue

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US11414737B2 (en) 2015-07-30 2022-08-16 Arcelormittal Method for the manufacture of a phosphatable part starting from a steel sheet coated with a metallic coating based on aluminum

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US10253418B2 (en) 2019-04-09
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NO2839049T3 (de) 2018-03-17
DK2839049T3 (da) 2017-11-20
MX358552B (es) 2018-08-23
BR112014025697B1 (pt) 2020-10-20
PT2839049T (pt) 2018-01-08
KR101886611B1 (ko) 2018-08-09
WO2013156688A1 (fr) 2013-10-24
EA030016B1 (ru) 2018-06-29
HUE037303T2 (hu) 2018-08-28
RS56715B1 (sr) 2018-03-30
AU2012377741A1 (en) 2014-12-04
US20150284861A1 (en) 2015-10-08
KR20160114735A (ko) 2016-10-05
JP2015520797A (ja) 2015-07-23
ZA201407327B (en) 2017-08-30
KR101667131B1 (ko) 2016-10-17
KR20180017229A (ko) 2018-02-20
AU2012377741B2 (en) 2016-03-17
SI2839049T1 (en) 2018-02-28
EA201401136A1 (ru) 2015-03-31

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