EP2054536B1 - Verfahren zum beschichten eines 6 - 30 gew.-% mn enthaltenden warm- oder kaltgewalzten stahlbands mit einer metallischen schutzschicht - Google Patents
Verfahren zum beschichten eines 6 - 30 gew.-% mn enthaltenden warm- oder kaltgewalzten stahlbands mit einer metallischen schutzschicht Download PDFInfo
- Publication number
- EP2054536B1 EP2054536B1 EP07802701A EP07802701A EP2054536B1 EP 2054536 B1 EP2054536 B1 EP 2054536B1 EP 07802701 A EP07802701 A EP 07802701A EP 07802701 A EP07802701 A EP 07802701A EP 2054536 B1 EP2054536 B1 EP 2054536B1
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- EP
- European Patent Office
- Prior art keywords
- coating
- steel strip
- content
- zinc
- annealing
- 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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- 239000011248 coating agent Substances 0.000 title claims abstract description 51
- 238000000576 coating method Methods 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000011241 protective layer Substances 0.000 title claims abstract description 12
- 239000010960 cold rolled steel Substances 0.000 title claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 81
- 239000010959 steel Substances 0.000 claims abstract description 81
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 61
- 238000000137 annealing Methods 0.000 claims abstract description 44
- 238000003618 dip coating Methods 0.000 claims abstract description 20
- 229910001868 water Inorganic materials 0.000 claims abstract description 17
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000001257 hydrogen Substances 0.000 claims abstract description 13
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 28
- 229910052748 manganese Inorganic materials 0.000 claims description 22
- 239000011701 zinc Substances 0.000 claims description 22
- 229910052725 zinc Inorganic materials 0.000 claims description 15
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 13
- 239000012535 impurity Substances 0.000 claims description 13
- 229910052742 iron Inorganic materials 0.000 claims description 13
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- 229910052710 silicon Inorganic materials 0.000 claims description 9
- 229910052759 nickel Inorganic materials 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 229910052758 niobium Inorganic materials 0.000 claims description 6
- 229910052698 phosphorus Inorganic materials 0.000 claims description 6
- 229910052720 vanadium Inorganic materials 0.000 claims description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 4
- PGTXKIZLOWULDJ-UHFFFAOYSA-N [Mg].[Zn] Chemical compound [Mg].[Zn] PGTXKIZLOWULDJ-UHFFFAOYSA-N 0.000 claims description 3
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 claims description 3
- 229910000611 Zinc aluminium Inorganic materials 0.000 claims description 2
- KFZAUHNPPZCSCR-UHFFFAOYSA-N iron zinc Chemical compound [Fe].[Zn] KFZAUHNPPZCSCR-UHFFFAOYSA-N 0.000 claims description 2
- 239000011777 magnesium Substances 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims 4
- KMWBBMXGHHLDKL-UHFFFAOYSA-N [AlH3].[Si] Chemical compound [AlH3].[Si] KMWBBMXGHHLDKL-UHFFFAOYSA-N 0.000 claims 1
- 239000010410 layer Substances 0.000 abstract description 17
- 239000011572 manganese Substances 0.000 description 24
- 238000012360 testing method Methods 0.000 description 11
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 9
- 238000009863 impact test Methods 0.000 description 8
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 6
- 229910000617 Mangalloy Inorganic materials 0.000 description 5
- 238000010276 construction Methods 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000011253 protective coating Substances 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 238000005246 galvanizing Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229910015136 FeMn Inorganic materials 0.000 description 1
- 239000002318 adhesion promoter Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- FJMNNXLGOUYVHO-UHFFFAOYSA-N aluminum zinc Chemical compound [Al].[Zn] FJMNNXLGOUYVHO-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000007757 hot melt coating Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Images
Classifications
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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
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
- C23C2/0222—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating in a reactive atmosphere, e.g. oxidising or reducing atmosphere
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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
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
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- 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
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- 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
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/561—Continuous furnaces for strip or wire with a controlled atmosphere or vacuum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/11—Making amorphous alloys
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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
- C23C2/003—Apparatus
- C23C2/0038—Apparatus characterised by the pre-treatment chambers located immediately upstream of the bath or occurring locally before the dipping process
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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
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
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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
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
- C23C2/0224—Two or more thermal pretreatments
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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
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/024—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by cleaning or etching
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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
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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
- C23C2/12—Aluminium or alloys based thereon
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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
- C23C2/26—After-treatment
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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
- C23C2/26—After-treatment
- C23C2/28—Thermal after-treatment, e.g. treatment in oil bath
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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
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
Definitions
- the invention relates to a process for coating a hot-rolled or cold-rolled steel strip containing 6 to 30% by weight of Mn with a metallic protective layer, in particular a zinc-based protective layer, in which the steel strip to be coated is heated below 800 to 1100 ° C annealed a nitrogen, water and hydrogen-containing annealing atmosphere and then subjected to a hot-dip coating.
- steels with high manganese contents are, due to their favorable combination of properties consisting of high strengths of up to 1,400 MPa on the one hand and extremely high strains (uniform strains of up to 70% and elongations at break of up to 90%), in principle particularly suitable for use in the field of vehicle construction , especially in the automotive industry.
- particularly suitable steels with high Mn contents of 6 wt .-% to 30 wt .-% are for example from DE 102 59 230 A1 , of the DE 197 27 759 C2 or the DE 199 00 199 A1 known. From the known steels produced flat products have at high strengths isotropic deformation behavior and are still ductile even at low temperatures.
- JP 07-216524 A discloses a method of hot dipping a hot rolled steel plate having a high tensile strength.
- the steel plate is first descaled, pickled and cleaned. Then, it is lightly oxidized to produce thereon an iron oxide film having a thickness of 500 - 10,000 ⁇ .
- This iron oxide film is then reduced by reducing heating to active metallic iron. The reducing heating is carried out in such a way that a selective oxidation of Si and Mn in the steel and a concentration of these elements on the surface are avoided.
- the reductive heating is carried out under an atmosphere whose hydrogen concentration is controlled in the range of 3 to 25% by volume so as to have a reducing ability sufficient for the reduction of the iron oxide but omitting the selective oxidation of Si and Mn ,
- EP1612288 discloses a process for coating a 0.1 to 2.5 wt% Mn-containing steel strip with a zinc-based protective layer in which the steel strip to be coated is annealed at 650 to 900 ° C under a nitrogen, water and hydrogen containing Annealing annealed and then subjected to a hot dip coating.
- BE1011131A6 discloses a method for coating a steel strip with a zinc-based protective layer, in which the steel strip to be coated is annealed under an annealing atmosphere and then subjected to hot-dip coating.
- the ratio of the water content to the hydrogen content of the annealing atmosphere is between 0.07 and 0.35.
- the object of the invention was to provide a method by which high cost manganese steel sheets can be hot dip coated in a cost effective manner.
- the ratio% H 2 O /% H 2 of the water content% H 2 O to hydrogen Content% H 2 of the annealing atmosphere is set as a function of the respective annealing temperature T G as follows: % H 2 ⁇ O / % H 2 ⁇ 8th ⁇ 10 - 15 ⁇ T G 3 . 529
- the invention is based on the recognition that, by a suitable setting of the annealing atmosphere, namely its hydrogen content in relation to its water content and its dew point, a surface finish of the steel strip to be coated sets during the annealing, the optimum adhesion of the subsequently applied by hot-dip coating ensured metallic protective coating.
- the inventively set annealing atmosphere acts both with respect to the iron and against the manganese of the steel strip reducing.
- the formation of a according to the inventors the adhesion of the melt coating on the high manganese steel substrate impairing oxide layer thus deliberately avoided.
- the annealing and the hot dip coating can be carried out in a continuous pass.
- This type of application of the method according to the invention is particularly suitable when the coating is carried out in a conventional coil coating plant, in which an annealing furnace and the hot dip are arranged inline in the usual way and are run continuously in succession in an uninterrupted sequence.
- the inventive method is suitable for hot dip coating of high manganese steel strips with a substantially completely consisting of Zn and unavoidable impurities layer (so-called "Z-coating”), with a zinc-iron layer, which consists of up to 92 wt .-% Zn and up to 12% by weight of Fe (so-called “ZF coating”), with an aluminum-zinc layer whose Al content is up to 60% by weight and whose Zn content is up to 50% by weight.
- the coating procedure according to the invention is particularly suitable for steel strips which are highly alloyed in order to ensure high strength and good elongation properties.
- the steel strips which are provided with a metallic protective coating by hot-dip coating according to the invention typically contain (in% by weight) C: ⁇ 1.6%, Mn: 6 - 30%, Al: ⁇ 10%, Ni: ⁇ 10%, Cr: ⁇ 10%, Si: ⁇ 8%, Cu: ⁇ 3%, Nb: ⁇ 0.6%, Ti: ⁇ 0.3%, V: ⁇ 0.3%, P: ⁇ 0 , 1%, B: ⁇ 0.01%, N: ⁇ 1.0%, balance iron and unavoidable impurities.
- a steel which (in wt .-%) C: ⁇ 1.00%, Mn: 7.00 - 30.00%, Al: 1.00 - 10.00%, Si :> 2.50 - 8.00% (assuming that the sum of Al content and Si content is> 3.50 - 12.00%), B: ⁇ 0.01%, Ni: ⁇ 8, 00%, Cu: ⁇ 3.00%, N: ⁇ 0.60%, Nb: ⁇ 0.30%, Ti: ⁇ 0.30%, V: ⁇ 0.30%, P: ⁇ 0.01% , Rest contains iron and unavoidable impurities.
- both hot-rolled and cold-rolled steel strips can be coated in accordance with the invention.
- the steel strips are first cleaned in a continuous operating sequence and then held in a continuous annealing process to the respective annealing temperature T G , on which they have been held over an annealing time Z G of 30 seconds under a set according to the invention hydrogen-containing annealing atmosphere, has been brought.
- the annealed steel strips were each cooled to a bath inlet temperature of 470 ° C and passed in a continuous pass through a 460 ° C hot zinc molten bath consisting of 0.2% Al and balance of Zn and unavoidable impurities. After exiting the zinc molten bath, the thickness of the Zn protective coating on the steel strip has been adjusted in a manner known per se by means of a nozzle scraper system.
- the steel strip provided with the coating can be oiled for transport to the end user and wound up into a coil.
- test series V1 comprised five experiments V1.1 - V1.5 with a steel strip produced from steel S1. in the In the course of the test series V2, seven experiments V2.1 - V2.7 were carried out with a steel strip made of steel S2. In test series V3, eleven tests were finally carried out on a steel strip made of steel S3.
- the ratio% H 2 O /% H 2 is plotted against the annealing temperature T G.
- the area located below this curve is "E" in which according to the condition % H 2 ⁇ O / % H 2 ⁇ 8th ⁇ 10 - 15 ⁇ T G 3 . 529 the ratios% H 2 O /% H 2 maintained in the inventive setting of the annealing atmosphere are separated from the region "N" located above the curve K, in which the ratios% H 2 O /% H 2 of an atmosphere not adjusted according to the invention are arranged.
- FIG. 4 shows the result of a ball impact test carried out on the steel sheet coated in experiment V1.2.
- the poor adhesion of the coating to the steel substrate is evidenced by the cracks in the most deformed area of the cup formed in the steel sheet.
- Table 1 stolen C Si Mn P Cr Ni V S1 0.60 0.28 22.5 0,021 0,003 0.077 0,006 S2 0.63 0.20 22.2 0,014 0.130 0.046 0,200 S3 0.62 0.30 22.5 0,018 0,600 0,170 0,300 Data in wt .-%, balance Fe and unavoidable impurities attempt T G [° C] % H 2 [%] TP [° C] % H 2 O [%] % H 2 O /% H 2 Evaluation of galvanizing According to the invention V1.1 850 50 -31 0.03375 0.0006750 Bad No V1.2 850 100 -30 0.03747 0.0003747 Bad No V1.3 900 50 -38 0.01584 0.0003168 Bad No V1.4 950 50
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Priority Applications (1)
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PL07802701T PL2054536T3 (pl) | 2006-08-22 | 2007-08-20 | Sposób powlekania stalowej taśmy walcowanej na gorąco lub na zimno, zawierającej 6-30% wagowych Mn, z metaliczną warstwą ochronną |
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DE102006039307A DE102006039307B3 (de) | 2006-08-22 | 2006-08-22 | Verfahren zum Beschichten eines 6-30 Gew.% Mn enthaltenden warm- oder kaltgewalzten Stahlbands mit einer metallischen Schutzschicht |
PCT/EP2007/058602 WO2008022980A2 (de) | 2006-08-22 | 2007-08-20 | Verfahren zum beschichten eines 6 - 30 gew.-% mn enthaltenden warm- oder kaltgewalzten stahlbands mit einer metallischen schutzschicht |
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EP2054536A2 EP2054536A2 (de) | 2009-05-06 |
EP2054536B1 true EP2054536B1 (de) | 2010-11-03 |
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EP07802701A Not-in-force EP2054536B1 (de) | 2006-08-22 | 2007-08-20 | Verfahren zum beschichten eines 6 - 30 gew.-% mn enthaltenden warm- oder kaltgewalzten stahlbands mit einer metallischen schutzschicht |
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US (1) | US8394213B2 (ja) |
EP (1) | EP2054536B1 (ja) |
JP (1) | JP2010501725A (ja) |
KR (1) | KR101463221B1 (ja) |
CN (1) | CN101506403B (ja) |
AT (1) | ATE486974T1 (ja) |
AU (1) | AU2007287602B2 (ja) |
CA (1) | CA2660398C (ja) |
DE (2) | DE102006039307B3 (ja) |
ES (1) | ES2353438T3 (ja) |
PL (1) | PL2054536T3 (ja) |
WO (1) | WO2008022980A2 (ja) |
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DE102008056844A1 (de) | 2008-11-12 | 2010-06-02 | Voestalpine Stahl Gmbh | Manganstahlband und Verfahren zur Herstellung desselben |
KR101079472B1 (ko) * | 2008-12-23 | 2011-11-03 | 주식회사 포스코 | 도금표면품질이 우수한 고망간강의 용융아연도금강판의 제조방법 |
DE102009007909A1 (de) * | 2009-02-06 | 2010-08-12 | Thyssenkrupp Steel Europe Ag | Verfahren zum Herstellen eines Stahlbauteils durch Warmformen und durch Warmformen hergestelltes Stahlbauteil |
BRPI1015485A2 (pt) * | 2009-04-14 | 2016-04-26 | Nippon Steel Corp | aço de baixa gravidade específica para uso ótimo em forja em usinagem |
DE102009018577B3 (de) | 2009-04-23 | 2010-07-29 | Thyssenkrupp Steel Europe Ag | Verfahren zum Schmelztauchbeschichten eines 2-35 Gew.-% Mn enthaltenden Stahlflachprodukts und Stahlflachprodukt |
DE102009030489A1 (de) | 2009-06-24 | 2010-12-30 | Thyssenkrupp Nirosta Gmbh | Verfahren zum Herstellen eines warmpressgehärteten Bauteils, Verwendung eines Stahlprodukts für die Herstellung eines warmpressgehärteten Bauteils und warmpressgehärtetes Bauteil |
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DE102009053260B4 (de) * | 2009-11-05 | 2011-09-01 | Salzgitter Flachstahl Gmbh | Verfahren zum Beschichten von Stahlbändern und beschichtetes Stahlband |
DE102009044861B3 (de) * | 2009-12-10 | 2011-06-22 | ThyssenKrupp Steel Europe AG, 47166 | Verfahren zum Herstellen eines gut umformbaren Stahlflachprodukts, Stahlflachprodukt und Verfahren zur Herstellung eines Bauteils aus einem solchen Stahlflachprodukt |
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DE102010017354A1 (de) * | 2010-06-14 | 2011-12-15 | Thyssenkrupp Steel Europe Ag | Verfahren zum Herstellen eines warmgeformten und gehärteten, mit einer metallischen Korrosionsschutzbeschichtung überzogenen Stahlbauteils aus einem Stahlflachprodukt |
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KR101242953B1 (ko) * | 2010-12-27 | 2013-03-12 | 주식회사 포스코 | 도금 방법 및 아연 도금 장치 |
DE102011051731B4 (de) | 2011-07-11 | 2013-01-24 | Thyssenkrupp Steel Europe Ag | Verfahren zur Herstellung eines durch Schmelztauchbeschichten mit einer metallischen Schutzschicht versehenen Stahlflachprodukts |
JP5341270B1 (ja) * | 2012-04-25 | 2013-11-13 | 日新製鋼株式会社 | 黒色めっき鋼板の製造方法および黒色めっき鋼板の成形体の製造方法 |
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CN103160764A (zh) * | 2013-03-25 | 2013-06-19 | 冷水江钢铁有限责任公司 | 一种复合带钢的单面连续热镀锌方法 |
DE102013105378B3 (de) | 2013-05-24 | 2014-08-28 | Thyssenkrupp Steel Europe Ag | Verfahren zur Herstellung eines durch Schmelztauchbeschichten mit einer metallischen Schutzschicht versehenen Stahlflachprodukts und Durchlaufofen für eine Schmelztauchbeschichtungsanlage |
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-
2006
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2007
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- 2007-08-20 AT AT07802701T patent/ATE486974T1/de active
- 2007-08-20 PL PL07802701T patent/PL2054536T3/pl unknown
- 2007-08-20 US US12/377,323 patent/US8394213B2/en active Active
- 2007-08-20 KR KR1020097003603A patent/KR101463221B1/ko active IP Right Grant
- 2007-08-20 JP JP2009525041A patent/JP2010501725A/ja active Pending
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- 2007-08-20 EP EP07802701A patent/EP2054536B1/de not_active Not-in-force
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- 2007-08-20 WO PCT/EP2007/058602 patent/WO2008022980A2/de active Application Filing
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Also Published As
Publication number | Publication date |
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US8394213B2 (en) | 2013-03-12 |
WO2008022980A3 (de) | 2008-10-30 |
US20100065160A1 (en) | 2010-03-18 |
CN101506403B (zh) | 2011-12-28 |
DE502007005570D1 (de) | 2010-12-16 |
CA2660398A1 (en) | 2008-02-28 |
WO2008022980A2 (de) | 2008-02-28 |
ATE486974T1 (de) | 2010-11-15 |
CA2660398C (en) | 2013-11-05 |
AU2007287602A1 (en) | 2008-02-28 |
CN101506403A (zh) | 2009-08-12 |
KR101463221B1 (ko) | 2014-11-19 |
EP2054536A2 (de) | 2009-05-06 |
DE102006039307B3 (de) | 2008-02-21 |
ES2353438T3 (es) | 2011-03-02 |
KR20090040349A (ko) | 2009-04-23 |
JP2010501725A (ja) | 2010-01-21 |
AU2007287602B2 (en) | 2010-11-25 |
PL2054536T3 (pl) | 2011-04-29 |
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