CN102985570A - Method for producing a hot-formed and heat-treated steel component that is coated with a metal anti-corrosion coating from a sheet steel product - Google Patents
Method for producing a hot-formed and heat-treated steel component that is coated with a metal anti-corrosion coating from a sheet steel product Download PDFInfo
- Publication number
- CN102985570A CN102985570A CN2011800293670A CN201180029367A CN102985570A CN 102985570 A CN102985570 A CN 102985570A CN 2011800293670 A CN2011800293670 A CN 2011800293670A CN 201180029367 A CN201180029367 A CN 201180029367A CN 102985570 A CN102985570 A CN 102985570A
- Authority
- CN
- China
- Prior art keywords
- coating
- band steel
- steel goods
- aforementioned
- metal
- 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.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 136
- 239000010959 steel Substances 0.000 title claims abstract description 136
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 30
- 239000002184 metal Substances 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 238000000576 coating method Methods 0.000 title claims description 57
- 239000011248 coating agent Substances 0.000 title claims description 55
- 238000005260 corrosion Methods 0.000 title claims description 8
- 238000000034 method Methods 0.000 claims abstract description 67
- 238000000137 annealing Methods 0.000 claims abstract description 32
- 239000012535 impurity Substances 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 24
- 238000003856 thermoforming Methods 0.000 claims description 23
- 238000010791 quenching Methods 0.000 claims description 11
- 230000000171 quenching effect Effects 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 229910018134 Al-Mg Inorganic materials 0.000 claims description 4
- 229910018467 Al—Mg Inorganic materials 0.000 claims description 4
- 229910018125 Al-Si Inorganic materials 0.000 claims description 3
- 229910018520 Al—Si Inorganic materials 0.000 claims description 3
- 229910009369 Zn Mg Inorganic materials 0.000 claims description 2
- 229910007570 Zn-Al Inorganic materials 0.000 claims description 2
- 229910007573 Zn-Mg Inorganic materials 0.000 claims description 2
- 229910007567 Zn-Ni Inorganic materials 0.000 claims description 2
- 229910007614 Zn—Ni Inorganic materials 0.000 claims description 2
- 239000012466 permeate Substances 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 238000012797 qualification Methods 0.000 claims description 2
- 238000010301 surface-oxidation reaction Methods 0.000 claims description 2
- 229910018464 Al—Mg—Si Inorganic materials 0.000 claims 1
- 239000002994 raw material Substances 0.000 claims 1
- 238000005488 sandblasting Methods 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 229910000734 martensite Inorganic materials 0.000 abstract description 2
- 239000002245 particle Substances 0.000 abstract 2
- 239000012792 core layer Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 abstract 1
- 150000004767 nitrides Chemical class 0.000 abstract 1
- 239000011253 protective coating Substances 0.000 abstract 1
- 239000011241 protective layer Substances 0.000 abstract 1
- 238000005121 nitriding Methods 0.000 description 29
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 27
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 15
- 229910052757 nitrogen Inorganic materials 0.000 description 14
- 229910052742 iron Inorganic materials 0.000 description 8
- 238000012545 processing Methods 0.000 description 8
- 238000000465 moulding Methods 0.000 description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- 238000000227 grinding Methods 0.000 description 6
- 239000011701 zinc Substances 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 5
- 239000013078 crystal Substances 0.000 description 5
- 239000011572 manganese Substances 0.000 description 5
- 229910052725 zinc Inorganic materials 0.000 description 5
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910052748 manganese Inorganic materials 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 230000008595 infiltration Effects 0.000 description 3
- 238000001764 infiltration Methods 0.000 description 3
- 229910001338 liquidmetal Inorganic materials 0.000 description 3
- 229910000521 B alloy Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 125000004433 nitrogen atom Chemical group N* 0.000 description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910000617 Mangalloy Inorganic materials 0.000 description 1
- 229910000635 Spelter Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 238000007542 hardness measurement Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 230000005501 phase interface Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
Images
Classifications
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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
- 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
- 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
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent 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
- 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
- C21D8/0447—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 characterised by the heat treatment
- C21D8/0457—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 characterised by the heat treatment with diffusion of elements, e.g. decarburising, nitriding
-
- 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
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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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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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
- C23C2/0222—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
- C23C2/04—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
- 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
- C23C2/26—After-treatment
- C23C2/28—Thermal after-treatment, e.g. treatment in oil bath
- C23C2/29—Cooling or quenching
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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
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/82—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
- 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
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
- C23C28/321—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer with at least one metal alloy layer
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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
- 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
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
- C23C28/322—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer only coatings of metal elements only
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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
- 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
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
- C23C28/322—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer only coatings of metal elements only
- C23C28/3225—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer only coatings of metal elements only with at least one zinc-based layer
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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
- 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
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
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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
- 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
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/36—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including layers graded in composition or physical properties
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Abstract
The invention relates to a method for producing a steel component that is coated with a metal protective coating from a sheet steel product comprising at least 0.4 % by weight of Mn. In order to economically generate a high-strength steel component, while minimizing the risk of the development of metal-induced cracks, according to the invention the sheet steel product is annealed in a continuous furnace under an annealing atmosphere containing up to 25% by volume H2, 0.1 - 10% by volume NH3, H2O, the remainder being N2 as well as process-related inevitable impurities, at a dew point ranging between -50 DEG C and -5 DEG C and at a holding temperature of 400 - 1100 DEG C for a holding period of 5 - 600 s. The annealed sheet steel product has a nitride layer (N) 5 - 200 [mu]m thick, the particle size of which is finer than the particle size of the interior core layer (K) of the sheet steel product. After it has been coated with a metal protective layer, a blank is separated from the annealed sheet steel product and is soaked to an austenitizing temperature of 780 - 950 DEG C subsequent to an optional preforming step, is hot-formed to form the steel component and is cooled so quickly that a tempered martensitic structure forms in the sheet steel product.
Description
Technical field
The present invention relates to a kind of by the manufacturing of band steel goods through method thermoforming and quenching, that be coated with the steel components of metal anti-corrosion protection coating, these band steel goods have the manganese content of at least 0.4 % by weight.
Background technology
In 15 to 25 September in 2005 in the 61st International Auto Show that hold in Frankfort, be published in the article " potentiality of light and handy body of a motor car " in the exhibition newspaper of Thyssen Krupp automobile stock company and reported, particularly make in the high strength bodywork parts use heat moulding by the boron alloy steel in practice and quench.The exemplary of the boron alloy steel of herein mentioning is that label is the steel of 22MnB5, and this steel can find with material number 1.5528 in steel handbook 2004.
Known in JP 2006104526 A with the similar steel of steel 22MnB5.This known steel except iron and inevitably impurity also contain the C of (% by weight) 0.05-0.55%, maximum 2% Si, the Mn of 0.1-3%, maximum 0.1% P and maximum 0.03% S.In order to improve hardenability, can additionally in steel, increase the B of 0.0002-0.005% content and the Ti of 0.001-0.1% content.Each Ti content act as the nitrogen that exists in the steel is solidified.The boron that exists in the steel can as far as possible fully be brought into play its effect that promotes soundness by this way.
According to JP 2006104526 A, at first make sheet material by the steel of this type, this sheet material is being higher than Ac after a while
3-temperature, the typical case is arranged in the temperature of 850-950 ℃ of scope and carries out preheating.Next in press tool, carry out,, in the part by each sheet material blank extrusion molding, form and ensured the high-intensity martensitic structure of pursuing rapidly the process of cooling from this temperature province.Advantageously, the sheet material that is heated to described temperature levels can be deformed into by the deformation force of less the part of complicated shape.This is specially adapted to this class sheet material, and corrosion-resistant coating is made and be designed with to its steel by high soundness.
Zinc-plated band steel goods be thermoformed into high soundness or the steel components of high soundness have a special difficulty.Has the steel disc of metal corrosion-resistant coating owing to must be heated to such temperature in thermoforming and the quenching next carried out or carry out simultaneously with thermoforming; this temperature is positioned on the temperature of fusion of metal of supercoat, has thus so-called " embrittlement of liquefaction metal " risk.When the liquid metal of being fused into of coating penetrates in moulding process in the breach that each band steel product surface forms, the embrittlement of steel occurs.Liquid metal arrives steel base and the crystal boundary there compiles maximum pull and the pressure that thus reduction can be born.
The dangerous verified of liquefaction metal embrittlement that is contained the band steel goods that manganese steel makes by higher soundness and high soundness is crucial especially.So only having limited ductility, this class steel in its deformation process, trends towards forming near crack surperficial, close crystal boundary.
By known among the DE-OS 18 13 808, the erosion resistance of steel plate and oxidation-resistance can be processed by nitriding and improve, by this nitriding process produce one near the surface, thick 2.5-19 μ m have a marginal layer of comparing the nitrogen content of raising with the kernel area of steel plate.Nitrided case has preferably adhesivity.
Further known by DE 691 07 931 T2, process and to produce higher carbon content or nitrogen content in the zone near the surface of the band steel goods that formed by soft steel, be used for the motorcar body manufacturing by carburizing treatment or nitriding, be used for improving the handlability of relevant band steel goods.
In the prior art this measure does not have to link together with the steel of higher soundness or high soundness, as to have at least 0.4 % by weight manganese content, wherein the typical manganese content of the steel of processing is positioned at the 0.4-0.6 % by weight according to the present invention, is positioned at especially 0.6-3.0 % by weight scope.
The carbon content of the band steel goods of processing is typically more than 0.06 % by weight and is less than 0.8 % by weight according to the present invention, is less than especially 0.45 % by weight.
For every character of the steel of adjusting the processing according to the present invention, the Nb that can make it contain Ti, the B that reaches 0.005 % by weight that reaches 0.2 % by weight, the Cr that reaches 0.5 % by weight, reach the V of 0.1 % by weight or reach 0.03 % by weight.
The prerequisite of nitrogenize or inner nitriding is to have infiltrative nitrogen.This precondition is met when nitrogen is in original position (statu nascendi).
Usually, nitriding is processed by containing the H of ammonia
2-N
2Each band steel goods annealing is finished.The ammonia here and nitrogen are as the donor of nitrogen.Ammonia is at air pressure and be higher than under 400 ℃ the temperature and split into nitrogen and the hydrogen that doubles its volume.The decomposition of nitrogen can be described by following reaction equation:
2NH
3->2[N]+3H
2
Summary of the invention
Under the background of aforementioned prior art, the object of the invention is to, a kind of method is provided, allow in the mode of economy, the crack risk of metal inducement is being reduced to the steel components of making high soundness in minimum.
This purpose realizes thus according to the present invention,, in the steel components process of making high soundness, implements the algorithm that claim 1 discloses that is.
Design with advantage of the present invention provides in the dependent claims of each independent claim, and followingly sets forth general invention theory with details.
According to the method for the steel components for the manufacture of having the metal corrosion-resistant coating of the present invention, set out by this idea, before the band steel goods are carried out thermoforming, implement nitriding on its surface and process, process the marginal layer of in the band steel goods, making fine structure by this.On the one hand, this marginal layer is the moulding character of the thermoforming steel product of having improved surface grinding.
On the other hand, verified, the method according to this invention is of value to the metal embrittlement that prevents the meticulous sheet material of steel in the thermoforming process at the nitriding fringe region of band steel goods beyond expectationly.The nitriding district causes crystal boundary face/phase interface (Phasengranzflaechen) significantly improving in the thermoforming process, and this raising has been resisted by the plated film metallic substance and infiltrated the crack problem that steel base causes.There is a uncommon high iron infiltration in this external coating.Consequently, particularly in the treating processes based on the coating of zinc, coating is more stable aspect calorifics.
In order to utilize the Beneficial Effect according to marginal layer nitriding of the invention process of aforementioned summary, the method according to this invention comprises following treatment step:
Band steel goods that are formed from steel of-preparation, it has the manganese content of at least 0.4 % by weight.Said band steel goods refer to steel disc, steel band, steel plate or product of the same type herein.Such band steel goods can be processed in mode of the present invention in hot rolling or Cold Rolled Strip.Also may, different steel plates is combined to form band steel goods, these band steel goods are processed in next according to mode of the present invention, its light plate is made by the steel with type that claim 1 provides.
-band steel goods are annealed in continuous oven, and annealing atmosphere contains the H that reaches 25 volume %
2, 0.1-10 volume % NH
3, H
2The N of O and surplus
2And because technical qualification limit unavoidable impurity, this annealing atmosphere has the dew point between-50 ℃ and-5 ℃.Holding temperature is 400-1000 ℃, and the band steel goods are kept 5-600 second under this holding temperature.Final to have thickness by this nitriding-anneal at the band steel product surface be the ductile nitrided case of free surface 5-200 μ m, that be limited to the band steel goods, the grain-size of the inner nuclear layer that the grain-size of this nitrided case is inner, that covered by marginal layer less than being positioned at, be made of the basic material of band steel goods.
-after producing nitrided case, with the band steel goods of aforementioned manner annealing through the coat of metal coating.The present invention has herein utilized such understanding, the risk of liquefaction metal embrittlement can reduce thus, namely, can change by the neighbouring surface zone of on purpose adjusting the band steel goods for the resistless temperature range of liquefaction metal embrittlement, thereby make this temperature range and do not overlap for the typical temperature range of thermoforming.
-be divided into sheet material by the band steel goods of coat of metal coating.
If-moulding needs two or more steps, sheet material can alternatively premolding in this step.Premolding can be in so far, and the shape of sheet material almost completely is equal to the net shape of part after premolding.Typically, be preformed in one cold or be heated on the sheet material of half heat that is lower than austenitizing temperature and carry out.Premolding can not be used in the moulding of only finishing by one step of thermoforming.
-be heated to 780-950 ℃ austenitizing temperature for the sheet material of thermoforming.
-plate thermal forming after then will heating is final steel components.
-then the steel components that obtains is cooled off, set out by austenitizing temperature herein and accelerate cooling.The cooling of steel components is carried out like this, thereby forms quenching structure in the band steel goods.
Thermoforming and quenching can be finished in same step.In this case, thermoforming and the step of quenching jointly in an instrument carry out.In contrast, separately carry out algorithm " moulding " and " generating modulation tissue or quenching structure " in the process of dual-step type.
Surprisingly, utilize the annealing conditions that provides according to the present invention, even also can reach desirable depth of nitration in a short period of time.So the advantage of the method according to this invention is, uses continuous oven in a kind of very economical mode and carries out present method.This has realized that the method according to this invention is attached in the manufacturing processed take high-speed conveyor speed as prerequisite, that carry out continuously, and for example in the flame coating apparatus, steel band is continuous in service heat-treating and the hot dip process corrosion-resistant coating.
The iron surface that exists in reaction chamber is conducive to decomposition course in catalysis.In the moment that nitrogen-atoms separates, a part of nitrogen-atoms penetrates in the iron material.
The transfer of nitrogen occurs in several steps:
● transfer to workpiece surface
● be adsorbed on the surface
● impermeable surface (absorption)
● be penetrated into inside workpiece
Because the nitrogen solubility that improves in austenite, carrying out two-phase thermal treatment (is practical at two phase region α/γ-Fe) namely.No matter ensuing coat of metal coating is to carry out continuously or undertaken by part, usually, can optimize the effect that nitriding is processed in the mode of especially economy and environmental protection so in practice under the condition that provides, that is, and and observe at least following condition wherein one:
The H of-annealing atmosphere
2Content is no more than 10 volume %,
The NH of-annealing atmosphere
3Content is no more than 5 volume %,
The dew point of-annealing atmosphere is at-40 ℃ to-15 ℃,
-annealing temperature is at 680 ℃ to 840 ℃,
-annealing is held time and is 30-120 second.
For what effect of the present invention played a decisive role be, in anneal according to the present invention, the nitriding marginal layer adjusted, make its grain-size be far smaller than the inner nuclear layer grain-size of in annealing process, not carrying out nitriding of band steel goods.Actual test provides, according to the grain-size intrinsic numeric of DIN EN ISO 643 nitrided cases before than sheet material heating and thermoforming through the grain-size intrinsic numeric of the basic material (inner nuclear layer) of the band steel goods of annealing extremely when young 2.
In the method according to the invention the nitriding marginal layer is on purpose adjusted.This fine structure, equally just the thickness of the nitrided case of part recrystallize is determined by the nitriding hardening thickness that draws according to DIN 50190-3.Nitriding hardening thickness herein is the distance between from the surface to the steel base, and in the base steel bottom, hardness is corresponding to the core hardness of+50HV.Adjust such hardness, the hardness height at least 25% of this hardness ratio kernel area, i.e. HV(nitriding in the marginal layer zone process nitriding, close surface of band steel goods by this way)/HV (kernel area) 〉=1.25.
Typically, in the band steel goods of processing according to the present invention, the thickness of the nitriding marginal layer after anneal is greater than 5 μ m and less than 200 μ m.
The design that the present invention has advantage in practice especially is characterised in that the band steel article coatings with coat of metal is undertaken by the hot dip process coating, and this hot dip process coating is carried out in the algorithm that continues after anneal continuously.The anneal of carrying out according to the present invention in this case, with carry out for ensuing surface grinding, carry out simultaneously by the surface modulation that annealing gas-metal-reaction is carried out of out-phase.
What have especially advantage is, the method according to this invention is carried out in the flame coating apparatus, because anneal in this case can comprise edge nitriding, surface modulation and the recrystallization of ultimate principle, and ensuing hot dip process can be after anneal continuously online (inline) carry out.At this, can consider in principle, make and contain NH
3Gas stream cross the whole length of the stove that the band steel goods pass.For the whole parts that do not make continuous oven all are in the nitriding gas, advantageously, a part of stove are separated with the stove other parts, and contain NH
3Gas only this isolated part is carried out air inlet and impacts.
For the steel base coating adhesivity that guarantees in the hot dip process situation of carrying out as the flame coating of the band steel goods after the annealing, to optimize, can before the flame coating, carry out the surface oxidation of band steel goods.
In the preferred surface grinding process of being undertaken by hot dip process of band steel goods constructed in accordance, can introduce known coat system in steel base, this system is made of Zn, Al, Zn-Al, Zn-Mg, Zn-Ni, Zn-Fe, Al-Mg, Al-Si, Zn-Al-Mg or Zn-Al-Si.After hot dip process, can heat-treat step, form in a particular manner in order to make coat of metal.If demand is arranged, can also after hot dip process, permeate continuously annealing, for example zinc coating anneal.
The substituting or replenishing of the hot dip process of carrying out as online (in line), band steel goods (mode according to the present invention forms the nitrided case of a fine structure at this band steel goods in continuous annealing) can have a metal, metal-inorganic or metal-organic coating, for example separate out by PVD by Zn coating, ZnNi coating or ZnFe coating in this coating or CVD separates out or by other metals-inorganic or metal-organically electrolytically coating is carried out in coating process.
In order further to optimize mechanical properties, can after anneal according to the present invention, carry out in a usual manner an overaging and process.
Then has 800-2000MPa through the part that quenching obtains by the band steel goods after processing according to the present invention through thermoforming, particularly the tensile strength of 900-2000MPa.
Nitriding coating constructed in accordance has allowed, and band steel goods according to the present invention successfully are heated to austenitizing temperature, has complete austenitic structure at the band steel goods of this temperature.If the band steel goods are provided with metallic coating, the fusing point of this coating is less than or equal to Heating temperature, and it is minimum in high Heating temperature like this embrittlement risk to be dropped to.The fine grain of the marginal layer of realizing by nitriding of the present invention has been avoided the formation in crack and has been guaranteed that coating metal can not infiltrate in the basic material of kernel area or steel base.
By fine structure constructed in accordance, avoided in the preferred thermoforming process that does not directly namely have to carry out in the preformed situation of sheet material through the nitrided case of nitriding, by metallic coating spelter coating particularly, or the solid metal embrittlement that enters into crystal boundary that is caused by the coating metal infiltration.Similarly, forming of the method according to this invention coating that caused by nitriding, have advantage in view of the ratio of iron/coating metal avoided forming and having suppressed liquid metal embrittlement of weld seam.
Description of drawings
The below further sets forth the present invention according to embodiment.Among the figure:
Fig. 1: according to the vertical abrasive disc of the steel sample through nitriding annealing of the present invention;
Fig. 2: without vertical abrasive disc annealing, that roll hard comparative sample;
Fig. 3: the GDOES-depth curve of the nitrogen content of sample illustrated in figures 1 and 2;
Fig. 4: the vertical abrasive disc of the stretch zones of the steel components that is formed by steel sample shown in Figure 1;
Fig. 5: by the vertical abrasive disc that rolls the stretch zones of the steel components that hard steel sample forms shown in Figure 2.
Embodiment
For the effect of verifying that the method according to this invention can reach, make respectively a multi-phase Steels " MP " and be generally used for thermoforming steel " WU " roll hard cold belt sample.The composition of steel MP and WU provides in form 1.
The continuous oven that two samples of being made by steel MP and WU are put into for the marginal layer nitriding carries out according to anneal of the present invention.Annealing parameter used herein provides in form 2.
For the ease of relatively, two samples of being made by steel MP and WU are put into carry out tradition in the continuous oven and anneal, as the step that is generally galvanizing and prepares and carry out.
The microgram of being made and being carried out according to the present invention the sample after the anneal by steel WU has been shown among Fig. 1.Clearly can find out, as the result for the treatment of in accordance with the present invention step, adjust the structural region (nitriding zone N) of a fine structure near the surface
In contrast, the microgram of being made through cold rolling sample by steel WU does not equally have such nitriding zone N(Fig. 2).
This external pelivimetry make GDOES through the nitriding content of anneal according to the present invention and cold rolling sample by steel WU.GDOES(" GDOES "=Glow Discharge OpticalEmission Spectrometer) method of masurement refers to the standard method of quick acquisition coating concentration situation.It is by Hubert
VDI-Verlag GmbH describes in the VDI-dictionary " Werkstofftechnik " (material technology) of publishing in 1993 to some extent in the Dusseldorf.
The result that GDOES measures provides in Fig. 3, wherein be shown in dotted line the nitrogen that rolls hard sample and distributed, and solid line shows the nitrogen distribution of the sample of processing according to the present invention.
Fig. 3 also clearly shows, and the sample of processing according to the present invention has the nitrided case N of obvious nitrogenize, and its thickness is about 20 μ m.
In view of micro-hardness measurement can prove, kernel area (basic material) K that is made, do not passed through through having the microhardness of 340HV according to the nitrided case N of the nitrogenize in the heat treated sample of the present invention nitrogenize by steel WU has the hardness of 180HV.The hardness of the nitrided case N of nitrogenize
Hardness with kernel area K
Ratio
Be about 1.9, thus much larger than this ratio 1.25 that provides in advance according to the present invention.
Being the surface grinding of sample after the annealing, in this process is that the zinc layer of 10 μ m electrolytically is coated on the sample with thickness.
Next harden into steel components by the sample of being made by steel WU by so-called single step or the moulding of direct heat forming method and compacting.Sample is heated to 880 ℃ austenitizing temperature through 6 minutes austenitizing time and then is thermoformed into part for motorcar body in the hot compression deformation instrument for this reason.
The part that obtains after thermoforming is so rapidly cooling in a known way, thereby forms quenching structure.
Contrast by Figure 4 and 5 clearly shows no sign of the crack in the stretch zones of part made according to the method for the present invention and form, and there is the crack between crystal significantly in the part of traditional way manufacturing.
The sample of the annealed processing of being made by steel MP, zinc-plated and distortion is for providing similar result according to the sample after the anneal of of the present invention and traditional way.
The method according to this invention has been improved the processability of the band steel goods of surface grinding in the thermoforming.For this reason before surface grinding, with the mode of carrying out continuously or undertaken by part by in the annealing process on purpose gas-metal-reaction make the edge nitrogenize, consequently adjust the nitrogenous nitrided case N of a fine structure.The marginal layer N of this nitrogenize has improved the iron infiltration in the coating on the one hand, and has stoped labilizer " coating metal ", particularly zinc to be delivered to the crystallization boundary in the annealing process of carrying out before thermoforming.
The such part of final acquisition, its steel base does not have the crack fully.
Remaining iron and inevasible impurity
Claims (15)
1. one kind is coated with the method for the steel components of metal anti-corrosion protection coating by the manufacturing of band steel goods, and described band steel goods have the Mn content of at least 0.4 % by weight, and described method comprises following steps:
The described band steel goods of-preparation;
-described band steel goods are annealed in continuous oven;
-annealing atmosphere contains the H that reaches 25 volume %
2, 0.1-10 volume % NH
3, H
2The N of O and surplus
2And because technical qualification limit unavoidable impurity, and described annealing atmosphere has the dew point between-50 ℃ and-5 ℃,
-holding temperature is 400-1100 ℃
-holding time is 5-600 second,
-having the nitrided case that thickness is 5-200 μ m (N) through the described band steel goods of anneal, the grain-size of described nitrided case is less than the grain-size of the inner nuclear layer (K) that is positioned at described band steel goods inside;
-with coat of metal described annealed band steel goods are carried out coating;
-be partitioned into sheet material by described band steel goods;
-described sheet material carries out premolding alternatively;
-described sheet material is heated to 780-950 ℃ austenitizing temperature,
-will be steel components through the plate thermal forming of heating,
-described steel components accelerates cooling like this, thereby forms quenching structure in described band steel goods.
2. method according to claim 1 is characterized in that, the H of described annealing atmosphere
2Content is up to 10 volume %.
3. according to the described method of any one of aforementioned claim, it is characterized in that the NH of described annealing atmosphere
3Content is up to 5 volume %.
4. according to the described method of any one of aforementioned claim, it is characterized in that the dew point of described annealing atmosphere is-40 ℃ to-15 ℃.
5. according to the described method of any one of aforementioned claim, it is characterized in that the holding temperature of described annealing is 680-840 ℃.
6. according to the described method of any one of aforementioned claim, it is characterized in that holding time of described annealing is 30-120 second.
7. according to the described method of any one of aforementioned claim, it is characterized in that, the nitrided case (N) of the described band steel goods through annealing before sheet material heating and thermoforming draw the grain-size intrinsic numeric than the grain-size intrinsic numeric of basic raw material (K) extremely when young 2 according to DIN EN ISO 643.
8. according to the described method of any one of aforementioned claim, it is characterized in that with coat of metal the coating that described band steel goods carry out is undertaken by hot dip process, described hot dip process is carried out in the workflow of carrying out continuously, after anneal.
9. method according to claim 8 is characterized in that, carries out the surface oxidation of described band steel goods before described hot dip process.
10. according to claim 8 or 9 described methods, it is characterized in that described band steel goods permeate annealing continuously after described hot dip process is processed.
11. to the described method of 7 any one, it is characterized in that according to claim 1 the coating of described band steel goods with supercoat metal, metal-organically or metal-inorganic is separated out or CVD separates out and carries out by electrolytic coating or by PVD.
12. according to the described method of any one of aforementioned claim, it is characterized in that described metallic coating is Zn coating, Al coating, Zn-Al coating, Zn-Mg coating, Zn-Ni coating, Al-Mg coating, Al-Si coating, Zn-Al-Mg coating or Zn-Al-Mg-Si coating.
13., it is characterized in that adjusting the austenitizing temperature that obtains in described heat-processed is 860-950 ℃ according to the described method of any one of aforementioned claim.
14., it is characterized in that thermoforming and the process of cooling of the part that the thermoforming of described process obtains are carried out according to the described method of any one of aforementioned claim in a step.
15. according to the described method of any one of aforementioned claim, it is characterized in that, the part of described acquisition carried out sandblasting.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010017354.1 | 2010-06-14 | ||
| DE102010017354A DE102010017354A1 (en) | 2010-06-14 | 2010-06-14 | Process for producing a hot-formed and hardened steel component coated with a metallic anti-corrosion coating from a flat steel product |
| PCT/EP2011/059808 WO2011157690A1 (en) | 2010-06-14 | 2011-06-14 | Method for producing a hot-formed and heat-treated steel component that is coated with a metal anti-corrosion coating from a sheet steel product |
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| CN102985570A true CN102985570A (en) | 2013-03-20 |
| CN102985570B CN102985570B (en) | 2016-03-30 |
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| CN201180029367.0A Expired - Fee Related CN102985570B (en) | 2010-06-14 | 2011-06-14 | By flat steel product manufacture through thermoforming and quenching, the method for the steel components with metals against corrosion coating |
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| Country | Link |
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| US (1) | US20130206284A1 (en) |
| EP (1) | EP2580358A1 (en) |
| JP (1) | JP2013534971A (en) |
| KR (1) | KR20130085410A (en) |
| CN (1) | CN102985570B (en) |
| BR (1) | BR112012030991A2 (en) |
| DE (1) | DE102010017354A1 (en) |
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| US10041733B2 (en) | 2013-07-22 | 2018-08-07 | Thyssenkrupp Steel Europe Ag | Apparatus for the heat treatment of coated semi-finished steel products |
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| CN106795575B (en) * | 2014-10-09 | 2018-08-28 | 蒂森克虏伯钢铁欧洲股份公司 | The flat product and its manufacturing method of cold rolling and full annealed |
| CN106795575A (en) * | 2014-10-09 | 2017-05-31 | 蒂森克虏伯钢铁欧洲股份公司 | Cold rolling and full annealed flat product and its manufacture method |
| US10683560B2 (en) | 2014-10-09 | 2020-06-16 | Thyssenkrupp Steel Europe Ag | Cold-rolled and recrystallization annealed flat steel product, and method for the production thereof |
| CN106011652B (en) * | 2016-06-28 | 2017-12-26 | 宝山钢铁股份有限公司 | A kind of excellent cold rolling low-density steel plate of phosphorus characteristic and its manufacture method |
| CN106011652A (en) * | 2016-06-28 | 2016-10-12 | 宝山钢铁股份有限公司 | Cold-rolled low-density steel plate excellent in phosphating performance and manufacturing method of cold-rolled low-density steel plate |
| CN111334775A (en) * | 2018-12-18 | 2020-06-26 | 大众汽车有限公司 | Steel matrix for producing hot-formed and press-hardened steel sheet components and hot-forming method |
| CN111334775B (en) * | 2018-12-18 | 2022-12-23 | 大众汽车有限公司 | Steel matrix for producing hot-formed and press-hardened steel sheet components and hot-forming method |
| CN113994016A (en) * | 2019-06-03 | 2022-01-28 | 蒂森克虏伯钢铁欧洲股份公司 | Method for producing a sheet metal component from a flat steel product provided with a corrosion protection coating |
| CN112779475A (en) * | 2019-11-11 | 2021-05-11 | 本特勒汽车有限公司 | Automobile part with higher strength |
| CN115287444A (en) * | 2022-09-08 | 2022-11-04 | 西部超导材料科技股份有限公司 | Heat treatment method of Bi-2212 superconducting wire |
| CN115287444B (en) * | 2022-09-08 | 2024-02-06 | 西部超导材料科技股份有限公司 | Bi-2212 superconducting wire heat treatment method |
Also Published As
| Publication number | Publication date |
|---|---|
| US20130206284A1 (en) | 2013-08-15 |
| CN102985570B (en) | 2016-03-30 |
| EP2580358A1 (en) | 2013-04-17 |
| WO2011157690A1 (en) | 2011-12-22 |
| BR112012030991A2 (en) | 2016-11-08 |
| KR20130085410A (en) | 2013-07-29 |
| JP2013534971A (en) | 2013-09-09 |
| DE102010017354A1 (en) | 2011-12-15 |
| DE102010017354A9 (en) | 2012-04-05 |
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