TWI305234B - A high strength hot-dip galvanized steel sheet composed of composite microstructure having excellent formability and hole expandability, and a method for production the same - Google Patents
A high strength hot-dip galvanized steel sheet composed of composite microstructure having excellent formability and hole expandability, and a method for production the same Download PDFInfo
- Publication number
- TWI305234B TWI305234B TW094106063A TW94106063A TWI305234B TW I305234 B TWI305234 B TW I305234B TW 094106063 A TW094106063 A TW 094106063A TW 94106063 A TW94106063 A TW 94106063A TW I305234 B TWI305234 B TW I305234B
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- Prior art keywords
- steel sheet
- mass
- formability
- composite high
- hole expandability
- Prior art date
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- 239000002131 composite material Substances 0.000 title claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 229910001335 Galvanized steel Inorganic materials 0.000 title 1
- 239000008397 galvanized steel Substances 0.000 title 1
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 105
- 239000010959 steel Substances 0.000 claims abstract description 105
- 238000001816 cooling Methods 0.000 claims abstract description 31
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 229910052751 metal Inorganic materials 0.000 claims abstract description 10
- 239000002184 metal Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000005097 cold rolling Methods 0.000 claims abstract description 8
- 238000005098 hot rolling Methods 0.000 claims abstract description 7
- 238000007747 plating Methods 0.000 claims description 60
- 229910052725 zinc Inorganic materials 0.000 claims description 51
- 239000011701 zinc Substances 0.000 claims description 51
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 47
- 238000011282 treatment Methods 0.000 claims description 34
- 239000008187 granular material Substances 0.000 claims description 22
- 238000005554 pickling Methods 0.000 claims description 18
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000011651 chromium Substances 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 238000005275 alloying Methods 0.000 claims description 5
- 229910052804 chromium Inorganic materials 0.000 claims description 5
- 239000010410 layer Substances 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 229910052720 vanadium Inorganic materials 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 229910052718 tin Inorganic materials 0.000 claims description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- 239000011247 coating layer Substances 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims description 2
- 229910000734 martensite Inorganic materials 0.000 abstract description 3
- 239000004615 ingredient Substances 0.000 abstract description 2
- 229910052748 manganese Inorganic materials 0.000 abstract description 2
- 238000005246 galvanizing Methods 0.000 abstract 1
- 230000009466 transformation Effects 0.000 abstract 1
- 229910000859 α-Fe Inorganic materials 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 15
- 238000002474 experimental method Methods 0.000 description 10
- 238000005496 tempering Methods 0.000 description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 8
- 238000000137 annealing Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- 229910052758 niobium Inorganic materials 0.000 description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- 229910052761 rare earth metal Inorganic materials 0.000 description 4
- 230000035882 stress Effects 0.000 description 4
- 230000033558 biomineral tissue development Effects 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 3
- 239000003337 fertilizer Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229910000794 TRIP steel Inorganic materials 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 235000012054 meals Nutrition 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000002436 steel type Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 101000713585 Homo sapiens Tubulin beta-4A chain Proteins 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 102100036788 Tubulin beta-4A chain Human genes 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000016383 Zea mays subsp huehuetenangensis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000003679 aging effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- -1 butyl chrome Chemical compound 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- QNDQILQPPKQROV-UHFFFAOYSA-N dizinc Chemical compound [Zn]=[Zn] QNDQILQPPKQROV-UHFFFAOYSA-N 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 239000012770 industrial material Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052747 lanthanoid Inorganic materials 0.000 description 1
- 150000002602 lanthanoids Chemical class 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 235000009973 maize Nutrition 0.000 description 1
- 238000010128 melt processing Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 230000029052 metamorphosis Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- OXNIZHLAWKMVMX-UHFFFAOYSA-N picric acid Chemical compound OC1=C([N+]([O-])=O)C=C([N+]([O-])=O)C=C1[N+]([O-])=O OXNIZHLAWKMVMX-UHFFFAOYSA-N 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- HRZFUMHJMZEROT-UHFFFAOYSA-L sodium disulfite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])(=O)=O HRZFUMHJMZEROT-UHFFFAOYSA-L 0.000 description 1
- 229940001584 sodium metabisulfite Drugs 0.000 description 1
- 235000010262 sodium metabisulphite Nutrition 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
- B32B15/013—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium
-
- 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
- C21D8/0421—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 working steps
- C21D8/0426—Hot rolling
-
- 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
- C21D8/0421—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 working steps
- C21D8/0436—Cold rolling
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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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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- 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
-
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
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- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
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- 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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- 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
- C23C2/26—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
- 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
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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
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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
- C23C28/04—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings of inorganic non-metallic material
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- 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
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Description
1305234 九、發明說明: 【明戶斤軒々真】 技術領域 本發明係有關於一種成形性與擴孔性優良且經熔融鋅 5鏟敷的複合高強度鋼板及其製造方法。 L 才支ι标;| 技術背景 近來,對汽車的省油、車體的輕量化之要求更加強烈, 為求輕量化,對高強度鋼板之需求亦提高。然而,隨著此 1〇高強度鋼板強度之上昇,成形變得困難,尤其,會降低鋼 材的延展性。對此,最近汽車之骨架部材開始使用強度及 延展性兩者皆高之TRIP鋼(高殘留沃斯田鋼)。 然而,由於過去之TRIP鋼含有超過1%之以,因鍍敷時 不易均-地附著,使可適用之部材受到限制。而且,為維 15持殘留沃斯田鋼之高強度,須添加大量之c,有點溶接壤破 裂等熔接上之問題。因此,特開2__345288號公報揭示— 種以減低Si量為目的之熔融鋅鍍敷的複合高強度鋼板。然 而’該技術雖然可提高鍍敷性與延展性,但前述之炫接性 不但未獲改善’且TS^98〇MPa之TRIp鋼之降伏應力會變得 20非常局’有壓製時等之可塑性惡化之問題。於是,為以抑 鋼(複合組織鋼)解決前述問題,本發明人已先於特願 2〇〇3_239_號公報提出使Si、A卜Ts平衡位於特定之範圍 内,且以降伏應力低之加鋼,於玉#上製造可確保延展性 超越過去之熔融鋅贿的複合高強度鋼板之技術。 5 052 然而,最近因部材之不同,進行去毛邊加工使加工孔 部擴張以形成凸緣之部材也不少,且已開始要求兼具將擴 孔性亦視為重要之純之鋼板。絲於此需求,於前述特 願2〇〇3-239_號公報提出之肥粒體+麻田散體之加鋼中, 因肥粒體與麻峰體之·差異大,具有擴孔性差之問題。 【曰月内】 發明之揭示 為解決前述習知之問題,本發明之目的係以工業之規 模實現-種成形性與擴孔性優良且經炫融鋅鑛敷的複合高 1〇 強度鋼板及其製造方法。 本發明人針對成形性、密合性與擴孔性優良且經溶融 鋅鍍敷的複合高強度鋼板及其製造方法積極檢討之結果, 針對DP鋼,使鋼成分最佳化,即藉減低以量,並以ai為替 代元素,以提尚熔融鋅鍍敷之密合性,且特定幻與八1之關 15係式,同時限制C、Mn2添加量,以使具有強度及延展性 X方皆優異之材質特性,更於炫融辞鍍敷步驟之後,藉進 行必要之加熱處理,則可得到擴孔性及脆性穩定之材質。 並發現基於此技術思想所設計之鋼板,對於降伏應力低之 DP鋼,以習知之殘留沃斯田鋼為準,藉使金屬組織以肥粒 °鋼及面積率大於5%且小於60%之回火麻田散體為主體,可 破保延展性超越過去’得到最適合溶融鋅錄敷之擴孔性優 異之DP組織。 本發明更為了不使如延遲破斷及二次加工脆性等問題 發生’可容許含有5%以下不可避免之殘留沃斯田鋼。本發 1305234 明基於前述之技術思想,其要旨如下。 (1)一種成形性與擴孔性優良且經熔融鋅鍍敷的複合 高強度鋼板,以質量%計,含有C : 0.01〜0.3%、Si : 0.05 〜0.6%、Μη : 0.1 〜3.3%、P : 0.001 〜0.06%、S : 0.001 〜 5 0.01%、Α1 : 0.01 〜1.8%、Ν : 0.0005〜0.01%,且剩餘部份 由Fe及不可避免之雜質所構成,並且金屬組織係由肥粒體 及面積率大於5%且小於60%之回火麻田散體所構成。
(2)如(1)之成形性與擴孔性優良且經熔融鋅鍍敷的複 合高強度鋼板,其中前述經熔融鋅鍍敷的複合高強度鋼 10 板,以質量%計,更含有Mo: 0.05〜0.5%、V: 0.01〜0.1%、 TiO.Ol 〜0.2%、Nb : 0.005 〜0.05%、Cu : 1.0%以下、Ni : 1.0%以下、Cr : 1.0%以下、Ca : 0.0003〜0.002%、REM : 0.0003〜0.005%、B : 0.0003〜0.002% 中之1 種或2種以上。 (3)如(2)或(2)之成形性與擴孔性優良且經熔融鋅鍍敷 15 的複合高強度鋼板,其中A1之質量%在0.25〜1.8%之範圍 内,且Si、A1之質量%及目標之拉伸強度(TS)滿足下述式卜 式1:(0.0012父[丁8目標值]-0.29-[31]>/1.45<八1<1.5-3><|^]; [TS目標值]:鋼板之拉伸強度設定值(MPa)、[Si]: Si質量%、 [A1]:八1質量%。 20 (4)—種成形性與擴孔性優良且經熔融辞鍍敷的複合 高強度鋼板之製造方法,係藉由將,以質量%計,含有C : 0·01 〜0.3%、Si : 0.05〜0.6%、Μη : 0.1 〜3.3%、P : 0.001 〜0.06%、S : 0.001 〜0.01%、Α1 : 0.01 〜1.8%、Ν : 0.0005 〜0.01%,且剩餘部份由Fe及不可避免之雜質所構成之平板 7
1305234 熱軋後冷軋,於熔融鋅鍍敷加熱步驟中以Aci〜Ac3+100°c 之溫度加熱,保持30秒〜分鐘後,以i°c/s以上之冷卻速 度冷卻至450〜60〇t之溫度,接著以該溫度進行熔融鋅鍍 敷處理,之後以l°C/s以上之冷卻速度冷卻至麻田散體變態 5點以下之溫度後,保持大於200。(:且小於之溫度1秒〜 5分鐘之後,以5°C/s以上之冷卻速度冷卻至100°C以下,產 生由肥粒體及面積率大於5°/〇且小於60%之回火麻田散體構 成之金屬組織。 (5)如(4)之成形性與擴孔性優良且經熔融鋅鍍敷的複 10 合高強度鋼板之製造方法’其中經前述熔融辞鍍敷處理 後,再進行合金化處理。 (6) 如(4)或(5)之成形性與擴孔性優良且經熔融鋅鍍敷 的複合高強度鋼板之製造方法,其中於前述鋅鍍敷層或合 金化鋅鑛敷層上,更進行鉻處理、無機皮膜處理、化學轉 15 化處理、樹脂皮膜處理中之1種或2種以上之後處理者。 (7) 如(4)〜(6)之成形性與擴孔性優良且經熔融鋅鍍敷 的複合高強度鋼板之製造方法,其中前述經熔融辞鍍敷的 複合高強度鋼板’以質量%計’更含有Mo: 0·05〜0.5%、v : 0.01 〜0.1%、TiO.Ol〜0.2%、Nb : 0.005〜0.05%、Cu : ι·0〇/〇 20 以下、Ni: 1·〇%以下、Cr: 1·〇%以下、Ca: 0.0003〜〇·〇〇2〇/〇、 REM : 0.0003〜0.005%、Β : 0.0003 〜0.002% 中之 1種或2種 以上。 (8)如申請專利範圍第4或5項之成形性與擴孔性優良 且經熔融鋅鍍敷的複合高強度鋼板之製造方法’其中A1之 8 1305234 質量%在0.25〜I·8%之範圍内,且Si、A1之質量%及目標之 拉伸強度(TS)滿足下述式1 ; 式1:(0.0012父[丁8目標值]-〇.29-叫])/1.45<八1<1.5_3><[以]· [TS目標值]:鋼板之拉伸強度設定值(MPa)、[Si]: 8丨質量%、 5 [A1]:A1 質量%。 (9) 如(4)〜(7)之成形性與擴孔性優良且經熔融鋅锻敷 的複合高強度鋼板之製造方法,其中於前述冷軋至熔融鋅 錄敷步驟之間’對鋼板片每面進行〇 01〜2 〇g/mkNi、^ Co、Sn、Cu中之1種或2種以上之預锻。 (10) 如(9)之成形性與擴孔性優良且經熔融鋅鍍敷的複 合高強度鋼板之製造方法,其中於前述預鍍前’對鋼板’進 行酸洗處理。 t實施方式;3 實施本發明之最佳形態 15 首先,說明本發明中規定之_融鋅鍍敷的複合高 度鋼板之成分及金屬组織之限制理由。 c係確㈣度及歡細散龍織之基从素 須之成分。㈣職法確健度,且不會形成 田散體之相。另—方面,紅超軌3%,則強度會過^, 延展性不足並且使熔祕魏。因此,c ㈣’且以0.03〜0.15%為佳。 疋為0.01. 幻為確保強度及延展性而添加之元 過〇_6%則熔融鋅鍍敷性 仁右添加置^ 〜0.6%,且^ 因此,Si之範圍定為〇.〇 右視熔融辞鍍敷性,則以〇1%以下為佳。 20 1305234 Μη係在確保強度之觀點上必須添加,且使碳化物延遲 生成之το素,並且亦係產生沃斯田體必須之元素。若“打小 於0.1%則強度不足’且若Mn之添加量超過3·3%則麻田散體 會過度增加,使強度提高並且使強度差異變大,且延展性 5不足,無法作為工業材料使用。因此,Μη之範圍定為〇.j 〜3.3%。 Ρ係對應必須之強度水準添加而可提高鋼板強度之元 素,但若添加量過多則會往晶界偏析,使局部延展性劣化, 同時熔接性也會劣化,故Ρ之上限值定為〇 〇6%。另一方面, 10為避免精煉成本提馬,將Ρ之下限定為0.01%。 另外,S係若產生MnS則會使局部延展性、熔接性劣化 之元素,為不宜存在於鋼中之元素,故上限定為〇〇1%,但 為避免提高精煉成本,將S之下限定為0 〇〇1%。 A1係促進肥粒體產生必須之元素,並有助於提高延展 15性,且即使大量添加亦不會妨礙熔融鋅鍍敷性,更可發揮 脫氧元素之作用。因此,在提高延展性之觀點上必須含有 0.01%以上之A1,但若A1過度添加則前述效果會達到飽和, 反而會使鋼脆化並降低熔融辞鍍敷性,故其上限定為 1.8%。以確保鋼板強度之觀點來看,添加量宜大於〇 25%且 20 小於 1.8%。 N係不可避免含有之元素,且若含有量大時不但會使時 效性劣化,且A1N之析出量會增加,降低添加A1之效果,故 含有量宜小於0.01%。另外,由於減少多餘之N會增加製鋼 工程之成本,故宜控制於0.0005%以上。 10 1305234 本發月中’須要更南之強度時為改善鑛敷密合性會 添加大量A1代替Si、尤其當G.25%SA1y篇時令A!、si 及TS之平衡在式i之範圍内’可確保充分之肥粒體 ,並碟保 兼具更佳之熔融鋅鍍敷性及延展性兩者。 式1 : (0.00l2x[TS 目標值].〇.29_[Si])/145<A1<i 5 3x [Si] -則述式1中’ [TS目標值]係指鋼板之拉伸強度設定 值(MPa)、[Si]係指si質量% ' [A1]係指A1質量。/。。 .本發明除前述成分之外,更可添加M〇: 0.05~0.5% ' 0-01-0.1% λ Τι〇.〇ΐ^〇ι2〇/0 . Nb . 0.005^0 〇5〇/〇 ^ Cu . 咖以下、Ni:1.0%以下、Cr:1〇%以下、Ca:〇 〇〇〇3〜 〇顧、REM : 〇._3〜〇 〇〇5%、b : 〇 〇〇〇3 1種或2種以上。 15
Mo有增強鋼板強度及泮火性之效果,若小於〇㈣則 特有的淬火性效果,不能形成充分之麻田散
度不足。另—方面’若添加達G.5%以上,則會抑制 產生化’同時亦會使鍍,故 上限定為0.5%。 20 nrJ I、Nb# 可於V : _〜G1%,™.G1 〜G.2%,Nb : 〇.〇5/。之範_添加以提高強度^另外亦可添加 r ' i、Cu作為強化元素’特超敝糊延展性及化學 处理性會纽。又’ Ca、rem可控做雜物並改善擴 ooow故可分別於& :⑽咖〜嶋%、REM :議3〜 之範圍内添加。再者,B從淬火性及細析出性以 11 1305234 增加有效A1之觀點來看,可添加B : 0.0003〜〇的2%。
本發明中,為了得到強度、延展性皆優異之鋼板,故 以肥粒體及麻田散體之複合組織作為鋼板之組織。肥粒體 係指多角肥粒體、變韌肥粒體。另外,亦可藉由退火後冷 5卻,以產生部份之變韌體。另外,若殘存有沃斯田體,則 如二次加工脆化及延遲破斷性等會惡化,故雖然容許不可 避免地殘存有堆積率5%以下之殘留沃斯田體,但實際上以 不含有殘留沃斯田體為佳。 更’本發明中經溶融辞鍍敷的複合高強度鋼板之金屬 10組織之最大特徵,係於鋼中含有面積率大於5%且小於60% 之回火麻田散體。該回火麻田散體,係經熔融辞鍍敷處理 後之冷卻過程中產生之麻田散體,在麻田散體變態點以下 冷卻後,以200〜500°C之加熱處理回火,成為回火麻田散 體組織。此處,若回火麻田散體之面積率小於5%則組織間 15之硬度差會變得過大,看不出擴孔性之提高,另一方面, 若超過60%則鋼板強度會變得過低,故將回火麻田散體之 面積率定為大於5%且小於60%。更令殘留沃斯田體為5%以 下,以使如延遲破斷及二次加工脆化等不會造成問題,並 藉由於實質上以肥粒體及麻田散體及回火麻田散體組織為 20 主相之鋼板中平衡地存在,可以改善加工性及擴孔性。而 且’於溶融鋅鍍敷處理後,冷卻至麻田散體變態點以下, 進行加熱、回火處理,係由於若回火處理在鍍敷前進行, 會因鍍敷步驟再度回火,而無法得到所要求之回火麻田散 體量之故。 12 1305234
接-著’針對本發明之經熔融鋅鍍敷的複合高強度鋼板 之义^方法進行δ兒明。本發明之經溶融鋅鍍敷的複合高強 度鋼板之材料為將含有前述之鋼成分組織之平板,經通常 之熱札步驟製成熱軋鋼板,經酸洗、冷軋之後於連續炼融 5鋅鍍敷生產線之加熱步驟中,以Ac】〜Ac3+10〇t:範圍内之 溫度退火。此時’退火溫度若低於Aci則鋼板組織會不均 ’另一方面,溫度若高於Ac3+100°C則沃斯田體會粗大 化,抑制肥粒體之產生且降低延展性。從經濟之觀點來看 上限溫度宜低於9〇〇。(:。另外,為使帶狀組織分解,前述退 10火中之保持時間宜大於30秒且小於30分鐘。若保持時間超 過30分鐘則前述效果會飽和,降低生產性。如此方式,接 著冷卻退火之鋼板,而該冷卻時以1°C/S以上,且以2〇°c/s 以上為佳之冷卻速度冷卻至450〜600°C。若冷卻溫度超過 600°C則不但鋼板中之沃斯田體容易殘留,且二次加工性' 15延遲破斷性會劣化。另一方面,若不足450。(:,則相對於之 後之熔融鋅鍍敷處理,溫度會變得過低,造成鑛敷處理之 障礙。另外,冷卻速度為l°C/s以上,且以2〇°c/s以上為佳。 以如此方式進行退火、冷卻之鋼板,亦可在熔融辞錢 敷處理前以300〜500°C之溫度進行保持6〇秒〜2〇分鐘之過 2〇時效處理。雖然不宜進行該過時效處理,但前述條件左右 之過時效處理不會對材質有太大之影響。 經如此處理之鋼板,接著進行熔融辞鍍敷處理,但該 鍍敷處理亦可以通常進行之鍍敷條件進行。熔融鋅電鍍浴^ 之溫度可使用以往適用之條件,例如,可使 13 1305234 之溫度。另外,炫融金屬σ φ λ* ^ 镯/、要以辞為主體即可,但亦可含 有不可避免之卩15、〇(1、>^、]^心卞. Mi Fe、八卜 Tl、Nb、_等。為了 更提高舰層層亦可含有就量之Mg、Ti、 施、Fe、Nl、C。、A1。另外’將熔融鋅鍵敷量定為鋼板每 5㈣〜’可__之用途。另外,本發明亦可於 前述熔融鋅鑛敷處理後進行合金化處理,製成合金化炫融 鋅鋼板。此時’將合金化處理條件定為梢〜6贼,可修
正鑛敷層内之Fe》農度,例如,控制Fe之質量%於7〜15%。 經刖述熔融鋅鍍敷處理後,或經合金化熔融鋅鍍敷處 10理後,將鋼版冷卻至麻田散體變態溫度以下,使鋼板内產 生麻田散體組織。麻田散體變態點MS,以MsfC )=561-471 xC(%)-33xMn(0/〇)-17xNi(0/〇)-17xCr(%)-21 xMo(%)求出,若溫 度大於MsfC)則不會產生麻田散體。另外,前述冷卻時之 冷卻速度宜大於l°C/s。為確實得到麻田散體組織則冷卻速 15 度以3°C/s以上為佳。 經如此處理之鋼板,接著以大於200。(:且小於500°C之 溫度保持1秒〜5分鐘之後,以5°C/s以上之冷卻速度冷卻至 l〇〇°C以下之溫度。在該加熱處理時,若溫度小於200°C則 不會產生回火,組織間之硬度差會變大,看不出擴孔率之 20 提高,另一方面,若超過500°C,則會回火過度使強度降低。 該加熱步驟係與熔融鋅鍍敷生產線相連設置,雖然亦可設 於其他生產線,但與熔融鋅鍍敷生產線相連設置,從生產 性之觀點來看較佳。另外,前述保持時間若未滿1秒則回火 會幾乎無進展或成為不完全之狀態,看不出擴孔性之提 14 1305234 高。且若超過5分鐘則因回火幾乎已結束,故於超過之時間 中之效果會達飽和。又’為_預定之㈣麻讀體之量, 加熱後之冷卻係以5t/s以上,且以15t/s以上為佳之冷卻 速度冷卻。 另外本發明中,為提高耐触性,亦可於如前述步驟 製泣之溶解鋅錢敷鋼板、或合金化溶融辞艘敷鋼板之表層 進<丁鉻處理、無機皮膜處理、化學轉化處理、樹脂皮膜處 理中之1種或2種以上之後處理。 更’本發明中宜於冷軋後至溶融辞鐘敷加熱步驟之 間以Ni、Fe、Co、Sn、Cu中之1種或2種以上,進行鋼板 片每面0.01〜2.0g/m2、且以0.^ 〇咖2為佳之預鍛。預鍛 之方法可採用電鍍、浸鑛、喷霧等任何方法。鑛敷附著量 若小於O.OlgW則無法藉鍍敷得到提高密合性之效果,若超 過2.〇g/m2則會增加成本,故定為鋼板片每面〇〇1〜 15 2.0g/m2。另外’亦可於前述預鑛前進行酸洗處理。該酸洗 處理可使鋼板表面活性化,亦可提高預鍵之鍍敷密合性。 又,藉由在連續退火步驟中進行酸洗處理以去除於鋼板表 面產生之Si、Μη等之氧化物,亦是改善紐密合性之有效 手段。酸洗可使用以往適用之鹽酸、硫酸等,例如,可使 20用酸洗液濃度2〜20%,溫度2〇〜听之酸洗條件。另外, 可對應設備使用浸潰、電解、喷霧等酸洗方法。酸洗時間 雖然會因酸液濃度而異,但以1〜20秒為佳。 更’為提高錢敷密合性,宜進行於鍵敷前之鋼板表層 附近產生内部氧化層或晶界氧化物,以防止厘11、&之表^ 15 1305234 濃化,並利用熔融鋅鍍敷加熱步驟之進入側之清洗設備, 進行研磨刷之表面研磨。 實施例1 將具有如表1所示之成分組成之鋼於真空熔解爐中熔 5解、鑄造成之鋼板,以1200°C再加熱後,於熱軋時以88〇。〇 之溫度進行精加工輥軋,成為熱軋鋼板後,冷卻,並於600 °c之溫度下保持丨小時,以重現熱軋之捲繞熱處理。將所得 到之熱軋鋼板,藉研磨除去積垢,以70%之壓下率進行冷 輥軋,之後使用連續退火模擬器,加熱至肋❹它之溫度後, 10於該溫度下保持100秒以進行連續退火,接著以5〇c /s冷卻炱 650°C之後,於460°C之下進行熔融鋅鍍敷,於52(rc之下進 行合金化處理。接著,依下述2種製造方法,即,習知方法 及本發明方法製造鋅鍍敷鋼板。 (1)比較例:之後,以l〇〇C/s冷卻至常溫。 15 (2)本發明例:之後,以l〇°C/s冷卻至麻田散體變態點 以下,再以300。(:之溫度加熱60秒,接著以2〇°c/s之冷卻速 度冷卻至100°C以下。 其結果如表2、3所示。 另外,表2、3中所示之拉伸強度(TS)、擴孔率、金屬 20組織、鍍敷密合性、鍍敷外觀、合格判定係如以下所示。 •拉伸強度:以JIS5號拉伸試驗片之[方向拉伸進行評 價。 .擴孔率··採用日本鐵鋼聯盟規格,JFS t1〇〇m996 擴孔試驗方法。對ΙΟΟιηηιφ之沖孔(模内徑]〇3mm,間隙 16 1305234 12 · 5 %)以頂角6 0 °之圓錐衝頭朝使沖孔之毛邊朝外側之方 向’以20mm/min之速度進行頂擴成形。 擴孔率: D :龜裂貫通板厚時之孔徑(mm) 5 D〇 :初始孔徑(mm) •金屬組織:以光學顯微鏡觀察,及肥粒體用硝竣麵 刻、麻田散體以列培拉(LePera)蚀刻觀察。 回火麻田散體面積率之定量化係以列培拉侧研磨 料(氧化紹處理)後,以腐餘液(純水、焦亞硫酸納、乙基醇: 1〇苦味酸之混合液)浸潰10秒後,再度研磨,水洗後以冷'
燥該試料,之後,將試料之組織放大1000倍並對l00|xmC
1〇一之範圍以路赛克斯(―)裝置狀面積以決定回火X 麻田散體之面積%。在表2、3中,該回火麻田散體面積率 為回火麻田散體面積〇/0 15 •職密合性:以6G°V彎曲試驗中彎曲部之剝離狀況 來評價。 ◎:鍍敷剝離小(剝離寬小於3mm) 〇幸:微之剝離’貫用上不會造成妨礙之程度 (剝離寬大於3mm小於7mm) 20 △.可發現相當量之剝離者 (剝離寬大於7mm小於10mm) X :有顯著剝離者 (剝離寬大於10mm) 鑛敷密合性以◎、〇為合格。 17 1305234 •鍍敷外觀:目視觀察 ◎:外觀均一,沒有未鍍敷及不均之處 〇:沒有未鍍但外觀有實用上不會造成妨礙之不均 △:外觀之不均顯著者 X :發生未鍍敷,且外觀之不均顯著者 鍍敷外觀以◎、〇為合格。
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Θ^ί®\ε* 區分 I trc* ΕΠ· 鞀 I 銥 g: g: s i 雜 I 恶 鄹 雜 璐 Μ· 1: S'· 5:. ii g n: 1 i W· 愁 i w i I 芸. 愁 m % I 賭 s g 翻 5: 齡 I 黎 聚 ψ 郯 I W 雜 u 将 I 1 1 £ I £ U 發 Η 1 u £ U 雜 tf S1- Ο ◎ ◎ ◎ ◎ ◎ 0 ◎ 〇 0 ◎ § ◎ © © % § ◎ © 0 ◎ @ © 0 0 0 〇 § 0 0 0 0 3 0 〇 0 0 0 © < ◎ < 0 © 0 X 效敷 密合性 ◎ D ◎ ◎ 0 0 © 0 Q c © ◎ ◎ ◎ 0 @ 0 © 0 0 D 0 0 0 0 0 § Q 0 0 0 〇 0 〇 0 0 0 Q <3 ◎ <j 0 0 0 0 X 擴孔率 (%) σ> Q CO CO CN r- oo (O [〇 m to M Φ § Oi if} CO ιΛ φ ιΛ τ ifi ” ίο Ιΰ σ» $ ιΛ τΤ r*< l£ IX) ? ο ίη s S (0. a Bflf IN n Λ nj* vs N to CO N [ 9.0 1 卜 σί r4 Φ v *n r N 卜 r> 白 w ιή co w CVJ (C S t-t (0 oo cj CM η τρ CM ρ ιΛ W 1 26.2 1 σ\ χη Ν 卜 es ιή ιό tr e〇 cs w r- <ΰ Μ 〇 VD € rr S Oi 0 CM in N N η λ 10 Ν CC Λ 59.^_II <5% II 65.3 II ν IT Ν 38.0 1 rH e>i *-< m 00 μ τ ρΐ Ν Μ <A)式判定 0 0 0 0 0 0 0 0 0 D 0 0 0 0 0 0 0 0 0 〇 0 0 0 0 0 0 0 0 0 0 0 0 X X X X X X X X X 0 X 0 0 0 X X | <A)式右邊 σ τΗ ίο c< o 1 1. 164 » & σ> φ σ> 〇 C 00 σ> O c FH N σ. o n n N ft N t-t s CO •H 1 1. 134 I 00 Cl *0 e«5 n N ca ιΛ 'fl* er y— Ο — ! 1.041 1 Ν σ> ο m o ι 1. 146 1 ο F- Γ·* g (£ 〇 g 〇 N 〇 o 〇 o N CM GO o N U> Ο CO PI ω ο ιΛ Ο 〇ύ 〇 'T ο 00 ο 1. 161 eo Ο 1. 251 m Φ ο σ> φ <£) Ο s 1.065 φ s ο CM a d < rt cn ο ο g o o c cc 〇 ! 0.990 异 TJ* ο Λ α ο 〇 S ο ο σϊ ο c σ o s to o o § o s o L_〇. 81Q J o 〇 o 00 o g o c f- ♦M o 00 o 〇 〇 Ο ΙΛ 00 ο Ο CD <0 Ο α 00 C0 ο ο GO Ο S 00 ο s iD 〇 ο w ο g 00 Ο 〇 S 〇 g 〇 o o o N ci CO o c\ u: a ο S ¢0 — ο U5 〇 〇 00 Ν Φ Ο Ν Ν ” Ο Ν Ο ν 努 η ο r: 〇 o 0.009 i ο I (A)式左邊 CO ο 6 c n s d 1 0. 103 c ο ο ο N G 6 ο r·» Ο 蒺 6 00 — d o 一 d CM d iE N 6 1 0.300 I o d 05 N (0 d r d § C7 d <5i d CO « c 0.484 1 6 Ν 哿 Ο 00 00 节 ό 苛 Ο d »*· Μ C n d (£> s 6 η to L0 Ο 0. 537 I ts- o o 卜 00 o 'fl* N 0 us N o ι·η Ο G ο λ C 00 Ν ο Μ φ d C C I 0. 955 a C Ο ο <0 tn ο ν ο ίο — c eg o η η C-J ο 艺 η ο I TS目標值(*)(MPa) ο (£> w g n I 440 O tc g ΙΛ ο ιΛ Ο η ΧΛ 1 540 c n g l〇 1______590一 I l 630 1 1 . 650 I o o N S c S 00 o cc § C0 ο ο 00 ο ο Q 另 2 0< g 00 § 1120 Λ 〇 1290 « o n o IS Ο Ο C ζ ο Λ s rr 300 1 Ο ο Β 00 00 § o ID 〇 tf g ω ο 〇〇 TSxEL c- § CO s — 1 18791 CO N § 00 X Οί σι 2 Csj Q0 V 00 ΙΛ 00 Μ Ν Ο Ξ N N 00 oo o n αο ο 1 I 19801 | N τ σ, 10 s 2 1 18891 1 CO 2 g CVJ 00 s CM © o s Γ3 TO oc ο § ;19670 I ! 18618 1 ο to ① S Q C I 20037 I CN: 5 ΤΡ C0 卜 i w ci Q 英 Ci (0 o to « 18044 — α Ρ·* ? η σ< G 写 00 σ N CC 11585 1 U3 σι f£ c\ 17255 17054 12632 15995 c CV (£ r-> [S <£) 1£Ι 16Ί04 1 ro 1 42.4 N ¢0 η V 突 η ω 芬 c CO a n r*» c〇 « 1.29. 9.1 CO tn ιΛ N — ΙΩ CVJ co CM N N cy M V Ν CM Μ ι 20. 2 1 00 φ ιβ ιΛ Oi (C CTi cc 〇 .13.5 I Λ W o eg 卜 00 12. 7 I m Ν η ιΛ C0 σ 卜 卜 〇 M 〇 ΤΓ 英 λ 另 TS (MPa) Φ P) p ri 1 443 1 467 g \ 511 10 ο η ιΛ ΙΛ s. ΙΛ S m. *Λ n <n (C η m ω 1_7P6 1 N 1__767 1 1 809 1 o V> CO CO CO CO 895 1 897 1 928 1 Μ Ν Q 00 w N Μ C5 5 Μ Ρ: 1147 I s CO CO — Λ Ν C 1402 Ι 3457 J o ΙΟ 312 Ι 1493 I 896 η μ αο 1136 723 ω N Λ 00 U3 ο 8 鋼種 < CO U 0 ω tu 0 X - >—1 乂 Jl 2 0 a. 0 X W H D > X > Ν <. a U < < < c 5 < — 5 ζ ο % ο a a H 3 > < 贫驗鵷號 r-i N f〇 U5 Ν CC Φ p r" 一 N V1 ιβ ω Cv oo 2 N Μ CM f〇 μ 10 N (£> Μ 00 M 05 P w n ΡΪ o n in {*5 ιο η S 00 M σι λ ο rr Μ **Ρ 5 ir Φ tv 00 ΙΜ}ΙΒΙΜΙΜ13ΓΙΜ>'-"^^7 回餐妒:* 21 1305234 從實施例1可知,表3之本發明例相對於表2相同編號之 比較例,可知因回火麻田散體之增加,使擴孔性提高。另 外,當未滿足式1時,雖然滿足合格條件,但與其他同程度 之TS鋼種相比,增加率較少,可知結果造成TSxm有降低之 5 傾向。 實施例2 將如表1所示本發明成分範圍内之L、AA、八;之鋼於真 空烙解爐中熔解、鑄造成之鋼板,以12〇〇°c再加熱後,於 熱軋中以880°C之溫度進行精加工輥軋,成為熱軋鋼板後, 1〇冷卻,並於600°C之溫度下保持1小時,重現熱軋之捲繞熱 處理。藉研磨除去所得到之熱軋鋼板之積垢,以7〇%之壓 下率進行冷親軋’之後以如下之實驗1}〜5)之條件進行預 鍵、酸洗實驗, 實驗1):(本發明例)以5%之鹽酸進行酸洗,進行〇 5g/m2 15 之Ni預鑛。 實驗2):(本發明例)不進行酸洗,進行〇 5咖2之见預 鍍。 實驗3):(比較例)以5%之鹽酸進行酸洗,進行〇 〇〇5g/m2 之Ni預鑛。 20 實驗4):(比較例)以5%之鹽酸進行酸洗,不進行預鍍。 貫驗5):(本發明例)不進行酸洗,不進行預參。 之後,使用連續退火模擬器,加熱至80(rt之溫度後, 於該溫度下保持1 〇〇秒以進行連續退火,接著以5<>C 人卻至 650°C之後,於46(TC之下進行熔融鋅鍍敷,於52〇t之下進 22 1305234 行合金化處理,之後,以l〇t:/s冷卻至麻田散體變態點以 下,以300°c之溫度加熱60秒,接著以20°c/s之冷卻速度冷 卻至常溫。之後,以1%之壓下率進行表皮輥軋,其結果如 表4。 表4/酸洗、預鍍條件差 貫驗編號 鋼種 鍍敷密合性 鑛敷外觀 區分 1 L ◎ ◎ 本發明例 2 L ◎ ◎ 本發明例 3 L Δ X 比較例 4 L X X 比較例 5 L ◎ ◎ 本發明例 1 ΑΑ ◎ ◎ 本發明例 2 ΑΑ ◎ 〇 本發明例 3 ΑΑ X X 比較例 4 ΑΑ X X 比較例 5 ΑΑ 〇 〇 本發明例 1 AJ ◎ ◎ 本發明例 2 AJ ◎ 〇 本發明例 3 AJ X X 比較例 4 AJ X X 比較例 5 AJ 〇 〇 本發明例
由實施例2可知,對於酸洗、預鍍之條件差,從實驗1)、 實驗2)可知藉由預鍍可大幅提高鍍敷密合性、鍍敷外觀, 尤其預鍍前宜進行酸洗。另外,從實驗3)可知若預鍍量少 則無效果,更於實驗4)中可知若只進行酸洗反而會使結果 10 惡化。只進行酸洗時,反而會使鍍敷密合性、鍍敷外觀惡 化之原因,可能係由於在表面過度活性化時,在連續熔融 鋅鑛敷之加熱步驟中進行加熱,再度於鋼板表面產生Si、 Μη等之氧化物,而使鍍敷性惡化。 23 1305234 產業上之利用可能性 依據本發明,可提供一種使用於汽車零件之成形性與 擴孔性優良且經熔融鋅鍍敷的複合高強度鋼板。 L圖式簡單說明3 5 無 【主要元件符號說明】 無
24
Claims (1)
1305234 十、申請專利範圍: 1. 一種成形性與擴孔性優良且經熔融鋅鍍敷的複合高強 度鋼板,以質量%計’含有C : 〇.〇1〜0.3%、Si : 0.05〜 0.6%、Μη : 0.1 〜3.3%、P : 0.001 〜〇 06%、S : 0.〇〇1 〜0.01%、Α1 : 0.01 〜1.8%、Ν : 〇·0005〜0·01%,且剩 餘部份由Fe及不玎避免之雜質所構成,並且金屬組織係 由肥粒體及面積率大於5%且小於6〇%之回火麻田散體 所構成。 2 10 15
20 如申請專利範圍第1項之成形性與擴孔性優良且經嫁融 鋅錢敷的複合高強度鋼板,其中前述經炫融鋅鍵敷的複 s向強度鋼板,以質量%計,更含有M〇 : 〇_〇5〜0.5%、 V · 0.01 〜0.1%、TiO.Ol〜0.2°/。、Nb : 0.005〜0.05%、 Cu . 1.0%以下、犯:1·〇°/〇以下、cr : ι·〇%以下、ca : 0.0003 〜0.002。/。、REM : 0.0003 〜〇 〇〇5%、b : 〇 _3 〜0.002%中之1種或2種以上。 3 如申請專利範圍第2項之成形性與擴孔性優良且經熔融 辛錄敷的複合高強度鋼板,其中A〗之質量%在0.25〜 I’8%之範圍内,且Si、Al之質量〇/〇及目標之拉伸強度(TS) 滿足下述式1, 式1 . (0.0012x[TS 目標值]_〇 29-[Si])/1.45<Al< [TS目標值]:鋼板之拉伸強度設定值(Mpa)、[si]: Sl 質量 °/〇、[Al] : A1 質量 %。 種成形性與擴孔性優良且經熔融鋅鍍敷的複合高強 25 1305234
10 15
20 度鋼板之製造方法,係藉由將,以質量°/〇計,含有C : 0.01 〜0.3%、Si: 0.05 〜0.6%、Μη: 0·1 〜3.3%、P: 0.001 〜0.06%、S : 0.001 〜0.01%、Α1: 0·〇1 〜1.8%、Ν: 0.0005 〜0_01% ’且剩餘部份由Fe及不可避免之雜質所構成之 平板熱軋後冷軋’於熔融辞鍍敷加熱步驟中以ACl〜 Ac3+100°C之溫度加熱,保持30秒〜30分鐘後,以fC/s 以上之冷卻速度冷卻至450〜600°C之溫度,接著以該溫 度進行熔融鋅鍍敷處理,之後以It:/s以上之冷卻速度冷 卻至麻田散體變態點以下之溫度後,保持大於^(^^且 小於500°C之溫度1秒〜5分鐘之後,以5°C/s以上之冷卻 速度冷卻至lOOt以下,產生由肥粒體及面積率大於5〇/〇 且小於6〇%之回火麻田散體構成之金屬組織。 5.如申請專利範圍第4項之成形性與擴孔性優良且經熔融 辞鍍敷的複合高強度鋼板之製造方法,其中前述經溶融 鋅鍍敷的複合高強度鋼板,以質量%計,更含有M〇:〇 〇5 〜0.5%、V : 0.01 〜0.1%、Tio.oho.y/。、 : 〇 〇〇5〜 0.05%、Cu : 1.0%以下、Ni : 1 ·〇%以下、Cr : } 〇%以下、 Ca : 0.0003 〜0.002%、REM : 〇._3〜〇 〇〇5%、b : 〇 〇〇〇3 〜0.002%中之1種或2種以上。 6·如申請專利範圍第4或5項之成形性與擴孔性優良且經 熔融辞鍍敷的複合高強度鋼板之製造方法,其中經前述 熔融辞鍍敷處理後,再進行合金化處理。 7’如申π專利範圍第4或5項之成形性與擴孔性優良且經 熔融鋅鍍敷的複合高強度鋼板之製造方法,其中於前述 26 1305234 鋅鍵敷層或合金化鋅鍵敷層上,更進行鉻處理、無機皮 膜處理、化學轉化處理、樹脂皮膜處理中之1種或2種以 上之後處理者。 8. 如申請專利範圍第4或5項之成形性與擴孔性優良且經 熔融鋅鍍敷的複合高強度鋼板之製造方法,其中A1之質 量%在0.25〜1.8%之範圍内,且Si、A1之質量%及目標 之拉伸強度(TS)滿足下述式1 ;
10 15
式1 : (0.0012x[TS 目標值]-0.29-[Si])/1.45<Al< 1.5-3x[Si]; [TS目標值]:鋼板之拉伸強度設定值(MPa)、[Si]: Si 質量%、[Al] : A1 質量%。 9. 如申請專利範圍第4項之成形性與擴孔性優良且經熔融 鋅鍍敷的複合高強度鋼板之製造方法,其中於前述冷軋 至熔融鋅鍍敷步驟之間,對鋼板片每面進行0.01〜 2_0g/m2之Ni、Fe、Co、Sn、Cu中之1種或2種以上之予頁 鍵。 10. 如申請專利範圍第9項之成形性與擴孔性優良且經熔融 鋅鍍敷的複合高強度鋼板之製造方法,其中於前述預鍍 前,對鋼板進行酸洗處理。 20 27
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CN114959491B (zh) * | 2022-06-20 | 2023-05-02 | 武汉钢铁有限公司 | 一种采用短流程生产的350MPa级高耐蚀涂镀薄钢板及方法 |
CN115386798B (zh) * | 2022-08-31 | 2024-01-30 | 马鞍山钢铁股份有限公司 | 一种超低硅Nb微合金化齿轮钢及其制造方法 |
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JP3587116B2 (ja) * | 2000-01-25 | 2004-11-10 | Jfeスチール株式会社 | 高張力溶融亜鉛めっき鋼板およびその製造方法 |
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US6586117B2 (en) * | 2001-10-19 | 2003-07-01 | Sumitomo Metal Industries, Ltd. | Steel sheet having excellent workability and shape accuracy and a method for its manufacture |
JP3881559B2 (ja) * | 2002-02-08 | 2007-02-14 | 新日本製鐵株式会社 | 溶接後の成形性に優れ、溶接熱影響部の軟化しにくい引張強さが780MPa以上の高強度熱延鋼板、高強度冷延鋼板および高強度表面処理鋼板 |
JP3908964B2 (ja) * | 2002-02-14 | 2007-04-25 | 新日本製鐵株式会社 | 成形性に優れた溶融亜鉛メッキ高強度鋼板およびその製造方法 |
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JP4214006B2 (ja) * | 2003-06-19 | 2009-01-28 | 新日本製鐵株式会社 | 成形性に優れた高強度鋼板およびその製造方法 |
EP1512760B1 (en) * | 2003-08-29 | 2011-09-28 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | High tensile strength steel sheet excellent in processibility and process for manufacturing the same |
ES2568649T3 (es) * | 2004-01-14 | 2016-05-03 | Nippon Steel & Sumitomo Metal Corporation | Chapa de acero de alta resistencia galvanizada en caliente con excelente adherencia del baño y capacidad de expansión de agujeros y método de producción de la misma |
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2004
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- 2005-02-28 PL PL05720077T patent/PL1724371T3/pl unknown
- 2005-02-28 WO PCT/JP2005/003805 patent/WO2005087965A1/ja not_active Application Discontinuation
- 2005-02-28 ES ES05720077.6T patent/ES2663866T3/es active Active
- 2005-02-28 CN CN200580007777.XA patent/CN100557056C/zh active Active
- 2005-02-28 KR KR1020067018302A patent/KR100831449B1/ko active IP Right Grant
- 2005-02-28 CA CA2559587A patent/CA2559587C/en active Active
- 2005-02-28 EP EP05720077.6A patent/EP1724371B1/en active Active
- 2005-02-28 US US10/591,919 patent/US20070190353A1/en not_active Abandoned
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TW200600592A (en) | 2006-01-01 |
EP1724371A4 (en) | 2007-12-26 |
EP1724371B1 (en) | 2018-02-07 |
KR20060118602A (ko) | 2006-11-23 |
US20070190353A1 (en) | 2007-08-16 |
CA2559587C (en) | 2010-11-09 |
ES2663866T3 (es) | 2018-04-17 |
JP2005256089A (ja) | 2005-09-22 |
KR100831449B1 (ko) | 2008-05-21 |
CN1930316A (zh) | 2007-03-14 |
CA2559587A1 (en) | 2005-09-22 |
CN100557056C (zh) | 2009-11-04 |
WO2005087965A1 (ja) | 2005-09-22 |
JP4510488B2 (ja) | 2010-07-21 |
PL1724371T3 (pl) | 2018-08-31 |
EP1724371A1 (en) | 2006-11-22 |
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