WO2022091480A1 - 熱間プレス部材および熱間プレス用鋼板ならびに熱間プレス部材の製造方法 - Google Patents
熱間プレス部材および熱間プレス用鋼板ならびに熱間プレス部材の製造方法 Download PDFInfo
- Publication number
- WO2022091480A1 WO2022091480A1 PCT/JP2021/024435 JP2021024435W WO2022091480A1 WO 2022091480 A1 WO2022091480 A1 WO 2022091480A1 JP 2021024435 W JP2021024435 W JP 2021024435W WO 2022091480 A1 WO2022091480 A1 WO 2022091480A1
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- WIPO (PCT)
- Prior art keywords
- hot
- steel sheet
- plating layer
- amount
- based plating
- Prior art date
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 103
- 239000010959 steel Substances 0.000 title claims abstract description 103
- 238000007731 hot pressing Methods 0.000 title claims abstract description 46
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 238000007747 plating Methods 0.000 claims abstract description 119
- 238000000034 method Methods 0.000 claims description 25
- 230000009466 transformation Effects 0.000 claims description 12
- 230000007797 corrosion Effects 0.000 abstract description 35
- 238000005260 corrosion Methods 0.000 abstract description 35
- 239000011248 coating agent Substances 0.000 abstract description 32
- 238000000576 coating method Methods 0.000 abstract description 32
- 239000011701 zinc Substances 0.000 description 141
- 239000010410 layer Substances 0.000 description 84
- 238000010438 heat treatment Methods 0.000 description 31
- 238000010422 painting Methods 0.000 description 13
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 12
- 238000006243 chemical reaction Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 10
- 239000000126 substance Substances 0.000 description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- 238000003466 welding Methods 0.000 description 9
- 229910052725 zinc Inorganic materials 0.000 description 9
- 238000004070 electrodeposition Methods 0.000 description 8
- 229910000765 intermetallic Inorganic materials 0.000 description 8
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 229910052726 zirconium Inorganic materials 0.000 description 8
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 7
- 238000011156 evaluation Methods 0.000 description 7
- 238000005098 hot rolling Methods 0.000 description 7
- 238000007670 refining Methods 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- 230000008961 swelling Effects 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 5
- 238000005275 alloying Methods 0.000 description 5
- 238000009713 electroplating Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 5
- 229920006395 saturated elastomer Polymers 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000005728 strengthening Methods 0.000 description 4
- 229910001335 Galvanized steel Inorganic materials 0.000 description 3
- 229910007570 Zn-Al Inorganic materials 0.000 description 3
- 229910007567 Zn-Ni Inorganic materials 0.000 description 3
- 229910007614 Zn—Ni Inorganic materials 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000010960 cold rolled steel Substances 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000004993 emission spectroscopy Methods 0.000 description 3
- 239000008397 galvanized steel Substances 0.000 description 3
- 235000010299 hexamethylene tetramine Nutrition 0.000 description 3
- 239000004312 hexamethylene tetramine Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000009616 inductively coupled plasma Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000013011 mating Effects 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 239000006104 solid solution Substances 0.000 description 3
- 239000011787 zinc oxide Substances 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910001338 liquidmetal Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000003303 reheating Methods 0.000 description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 description 2
- 235000011152 sodium sulphate Nutrition 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 description 2
- 229910000165 zinc phosphate Inorganic materials 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- -1 AlN nitride Chemical class 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910000611 Zinc aluminium Inorganic materials 0.000 description 1
- PGTXKIZLOWULDJ-UHFFFAOYSA-N [Mg].[Zn] Chemical compound [Mg].[Zn] PGTXKIZLOWULDJ-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 description 1
- JOSWYUNQBRPBDN-UHFFFAOYSA-P ammonium dichromate Chemical compound [NH4+].[NH4+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O JOSWYUNQBRPBDN-UHFFFAOYSA-P 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- RRIWRJBSCGCBID-UHFFFAOYSA-L nickel sulfate hexahydrate Chemical compound O.O.O.O.O.O.[Ni+2].[O-]S([O-])(=O)=O RRIWRJBSCGCBID-UHFFFAOYSA-L 0.000 description 1
- 229940116202 nickel sulfate hexahydrate Drugs 0.000 description 1
- QELJHCBNGDEXLD-UHFFFAOYSA-N nickel zinc Chemical compound [Ni].[Zn] QELJHCBNGDEXLD-UHFFFAOYSA-N 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- PVCCISSCNBXSKD-UHFFFAOYSA-N zinc heptahydrate Chemical compound O.O.O.O.O.O.O.[Zn] PVCCISSCNBXSKD-UHFFFAOYSA-N 0.000 description 1
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 1
- 229910000368 zinc sulfate Inorganic materials 0.000 description 1
- 229960001763 zinc sulfate Drugs 0.000 description 1
- RZLVQBNCHSJZPX-UHFFFAOYSA-L zinc sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Zn+2].[O-]S([O-])(=O)=O RZLVQBNCHSJZPX-UHFFFAOYSA-L 0.000 description 1
- 150000003754 zirconium Chemical class 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
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- C25D3/22—Electroplating: Baths therefor from solutions of zinc
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
- B21D22/022—Stamping using rigid devices or tools by heating the blank or stamping associated with heat treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
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- B32—LAYERED PRODUCTS
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- 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
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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
- 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
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
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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
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- C22C—ALLOYS
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- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C—CHEMISTRY; METALLURGY
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- C—CHEMISTRY; METALLURGY
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- C22C—ALLOYS
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- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
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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
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- 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
- C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
- C23C2/16—Removing excess of molten coatings; Controlling or regulating the coating thickness using fluids under pressure, e.g. air knives
- C23C2/18—Removing excess of molten coatings from elongated material
-
- 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
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- C23C2/28—Thermal after-treatment, e.g. treatment in oil bath
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/56—Electroplating: Baths therefor from solutions of alloys
- C25D3/565—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of zinc
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/02—Electroplating of selected surface areas
- C25D5/028—Electroplating of selected surface areas one side electroplating, e.g. substrate conveyed in a bath with inhibited background plating
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/16—Electroplating with layers of varying thickness
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/48—After-treatment of electroplated surfaces
- C25D5/50—After-treatment of electroplated surfaces by heat-treatment
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/60—Electroplating characterised by the structure or texture of the layers
- C25D5/605—Surface topography of the layers, e.g. rough, dendritic or nodular layers
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D7/00—Electroplating characterised by the article coated
- C25D7/06—Wires; Strips; Foils
- C25D7/0614—Strips or foils
Definitions
- the present invention relates to a hot pressing member, a steel sheet for hot pressing, and a method for manufacturing a hot pressing member.
- the present invention relates to a method for manufacturing a hot pressed member, a steel sheet for hot pressing, and a hot pressed member having excellent post-painting corrosion resistance and resistance spot weldability when a zirconium-based chemical conversion treatment is applied.
- the Zn—Ni alloy plated steel sheet is attracting attention as a steel sheet for hot pressing because the melting point of the plated layer is high, and a hot pressing member using this steel sheet and a method for manufacturing the same have been proposed.
- Patent Document 1 discloses a hot press member having an ⁇ -Fe (Zn, Ni) mixed crystal, an intermetallic compound of Zn, Ni and Fe, and a layer containing Mn.
- Patent Document 2 discloses a hot pressing member having a Ni diffusion region, an intermetallic compound layer corresponding to the ⁇ phase, and a ZnO layer.
- zirconium-based chemical conversion treatment has begun to spread in place of the conventional zinc phosphate-based chemical conversion treatment, and post-coating corrosion resistance of members subjected to electrodeposition coating after this zirconium-based chemical conversion treatment is also required. It has become.
- the hot press members disclosed in Patent Document 1 and Patent Document 2 are both hot press members manufactured by heating a Zn—Ni alloy plated steel sheet, and have corrosion resistance without coating and zinc phosphate-based chemical conversion. Excellent corrosion resistance after painting when the treatment is applied. However, there is a problem that the corrosion resistance after painting when the zirconium-based chemical conversion treatment is applied is insufficient.
- resistance spot weldability is also an important characteristic required for hot pressed members.
- Zn contained in the plating layer before heating is oxidized in the hot pressing process, so that the surface is mainly composed of zinc oxide and has a thickness of several ⁇ m.
- the oxide film to have is formed.
- Zinc oxide is a semiconductor, but it has a large resistivity and reduces resistance spot weldability. Therefore, as disclosed in Patent Document 3, the oxide film may be removed by shot blasting or the like for a hot pressed member using a galvanized steel sheet.
- the shot blasting process for ensuring resistance spot weldability increases man-hours and costs, and is a problem when applying a galvanized steel sheet to hot pressing.
- the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a hot pressed member having excellent post-painting corrosion resistance and resistance spot weldability, and a method for manufacturing the same. Another object of the present invention is to provide a hot pressing steel sheet suitable for a hot pressing member having excellent post-coating corrosion resistance and resistance spot weldability.
- the present inventors conducted diligent research in order to achieve the above-mentioned problems, and obtained the following findings.
- the amount of Zn adhered to the surface of the hot press member which is mainly evaluated for appearance corrosion, is set to 5 to 35 g / m 2
- the amount of Zn adhered to the surface of the Zn plating layer is set to 5 to 35 g / m 2. It is effective to set the average line roughness Ra to 2.5 ⁇ m or less.
- the average linear roughness Ra of the surface of the Zn plating layer of the surface mainly to be the mating surface for resistance spot welding in the hot press member is 3.5 ⁇ m or more. Is effective.
- a hot pressing steel sheet having a Zn-based plating layer having a Zn adhesion amount of 5 to 35 g / m 2 on one surface and a Zn adhesion amount of 40 to 120 g / m 2 on the other surface is heated. By pressing for a hot press, it is possible to obtain a hot pressed member having excellent corrosion resistance after painting and resistance spot weldability.
- a hot pressing member provided with Zn-based plating layers on both sides of a steel sheet.
- the amount of Zn adhered to the Zn-based plating layer on one surface of the steel sheet is 5 to 35 g / m 2 .
- the average line roughness Ra on the surface of the Zn-based plating layer is 2.5 ⁇ m or less.
- the average line roughness Ra of the surface of the Zn-based plating layer on the other surface of the steel sheet is 3.5 ⁇ m or more.
- Hot pressing member [2] A steel sheet for hot pressing provided with Zn-based plating layers on both sides of the steel sheet.
- the amount of Zn adhered to the Zn-based plating layer on one surface of the steel sheet is 5 to 35 g / m 2 .
- the amount of Zn adhered to the Zn-based plating layer on the other surface of the steel sheet is 40 to 120 g / m 2 .
- Steel plate for hot pressing. [3] A Zn-based plating layer is provided on both sides of the steel sheet.
- the amount of Zn adhered to the Zn-based plating layer on one surface of the steel sheet is 5 to 35 g / m 2 .
- a steel sheet for hot pressing, in which the amount of Zn adhered to the Zn-based plating layer on the other surface of the steel sheet is 40 to 120 g / m 2 .
- a method for manufacturing a hot pressed member that is hot pressed After raising the temperature from room temperature to the temperature range of Ac 3 transformation point to 1000 ° C. for 5 seconds or more and 600 seconds or less, and further holding the temperature in the temperature range of Ac 3 transformation point to 1000 ° C. for 300 seconds or less.
- a method for manufacturing a hot pressed member that is hot pressed After raising the temperature from room temperature to the temperature range of Ac 3 transformation point to 1000 ° C. for 5 seconds or more and 600 seconds or less, and further holding the temperature in the temperature range of Ac 3 transformation point to 1000 ° C. for 300 seconds or less.
- the steel sheet for hot pressing of the present invention is suitable for a hot pressing member having excellent post-coating corrosion resistance and resistance spot weldability.
- Hot press member The hot press member of the present invention is provided with Zn-based plating layers on both sides of a steel sheet, and the Zn adhesion amount of the Zn-based plating layer on one surface is 5 to 35 g / m 2 , and Zn is Zn.
- the average line roughness Ra of the surface of the system plating layer is 2.5 ⁇ m or less, and the average line roughness Ra of the surface of the Zn system plating layer on the other surface is 3.5 ⁇ m or more.
- the greatest feature of the present invention is that a difference is intentionally provided in the size of the surface unevenness on the front and back surfaces of the hot pressed member.
- the hot pressing member of the present invention is provided with Zn-based plating layers on both sides of the steel sheet.
- Zn in the plating layer diffuses into the underlying steel sheet, and a solid solution phase containing Fe and Zn is formed in this diffusion region.
- the Zn-based plating layer may contain other alloying elements.
- Zn in the Zn-based plating layer and oxygen existing in the heating atmosphere may be combined to form an oxide layer containing Zn on the surface of the Zn-based plating layer.
- the Zn-based plating layer which is an intermetal compound that did not contribute to diffusion into the base steel plate or formation of the oxide layer, remains as an intermetal compound phase, but Fe diffused from the base steel plate is taken in. , Zn, Fe and other alloying elements contained in the plating layer. Since both the solid solution phase and the intermetallic compound phase contain Zn having a sacrificial anticorrosion effect, they contribute to the improvement of corrosion resistance. As described above, in order to satisfy the post-coating corrosion resistance which is the subject of the present invention, the Zn-based plating layer is an indispensable constituent requirement, and this Zn-based plating layer is at least one of a solid solution phase and an intermetallic compound phase. Is included.
- the Zn adhesion amount of the Zn-based plating layer on one surface is 5 to 35 g / m 2 , and the average linear roughness Ra of the surface of the Zn-based plating layer is 2.5 ⁇ m or less.
- This surface is located on the outer surface of the hot pressed member and is mainly evaluated for its appearance corrosion performance.
- the amount of Zn adhered is less than 5 g / m 2 , the corrosion rate of zinc under the coating film becomes remarkably high, and the corrosion resistance after painting is lowered. Therefore, the amount of Zn adhered to the Zn-based plating layer is set to 5 g / m 2 or more.
- the Zn adhesion amount of the Zn-based plating layer is preferably 10 g / m 2 or more, and more preferably 15 g / m 2 or more.
- the amount of Zn adhered exceeds 35 g / m 2 , the reaction with the electrode metal becomes intense during resistance spot welding, and the risk of cracking due to the brittleness of the liquid metal increases. Therefore, the amount of Zn adhered to the Zn-based plating layer is set to 35 g / m 2 or less.
- the Zn adhesion amount is preferably 28 g / m 2 or less, and more preferably 25 g / m 2 or less.
- the Zn adhesion amount of the Zn-based plating layer is the amount of Zn contained in the Zn-based plating layer.
- the average line roughness Ra on the surface of the Zn-based plating layer is set to 2.5 ⁇ m or less.
- the average line roughness Ra is preferably less than 2.2 ⁇ m, more preferably less than 2.0 ⁇ m, and even more preferably less than 1.6 ⁇ m.
- the average line roughness Ra on the surface of the Zn-based plating layer is preferably 0.5 ⁇ m or more, and more preferably 1.0 ⁇ m or more.
- the average line roughness Ra of the surface of the Zn-based plating layer on the other surface is 3.5 ⁇ m or more.
- This surface is one of the above-mentioned surfaces (a surface having a Zn-based plating layer having a Zn adhesion amount of 5 to 35 g / m 2 and an average linear roughness Ra of the surface of the Zn-based plating layer of 2.5 ⁇ m or less). It is a surface located on the opposite side, is located on the inner surface of the hot press member, and is a surface to be a mating surface during resistance spot welding (Zn adhesion amount is 5 to 35 g / m 2 and Zn-based plating layer is used.
- the surface having an average line roughness Ra of the surface of 2.5 ⁇ m or less is the surface of the steel sheet
- the surface having an average line roughness Ra of 3.5 ⁇ m or more corresponds to the back surface of the steel sheet.
- an oxide film is formed on the surface of the member after hot pressing. Since this has a large resistivity, the thicker and more uniform it is, the lower the resistance spot weldability. Specifically, when a thick oxide film is present on the surface, energization becomes unstable due to the narrowing of the energization path, and scattering (burst) due to local energization occurs at a relatively low welding current.
- the oxide film has a higher hardness than the metal film and the electrode metal, but has poor toughness.
- the average linear roughness Ra is preferably 3.7 ⁇ m or more, more preferably 4.0 ⁇ m or more. More preferably, it is 4.5 ⁇ m or more. Most preferably, it is 5.0 ⁇ m or more.
- the average line roughness Ra on the surface of the Zn-based plating layer exceeds 8 ⁇ m, the coating appearance is significantly deteriorated.
- the average line roughness Ra of the surface of the Zn-based plating layer on the other surface is preferably 8 ⁇ m or less.
- the Zn adhesion amount of the Zn-based plating layer having an average line roughness Ra of 3.5 ⁇ m or more is preferably 40 to 120 g / m 2 .
- the steel sheet for hot pressing of the present invention is provided with Zn-based plating layers on both sides of the steel sheet, and the Zn adhesion amount of the Zn-based plating layer on one surface is 5 to 35 g / m 2 .
- the amount of Zn adhered to the Zn-based plating layer on the other surface is 40 to 120 g / m 2 .
- the metal constituting the Zn-based plating layer may be pure zinc or may contain other alloying elements. For example, by containing 0.1 to 20% of an element selected from Mg, Al, Cr, Co, and Ni, further improvement in corrosion resistance can be expected.
- the Zn-based plating layer may be one in which oxides are dispersed, and those containing 0.1 to 10% of SiO 2 or Al 2 O 3 nanoparticles are exemplified.
- the amount of Zn adhered to one surface of the hot-pressed steel sheet is set to 5 to 35 g / m 2 .
- the amount of Zn adhered is less than 5 g / m 2 , Zn is oxidized or evaporated by heating before hot pressing, and Zn in a metallic state including the intermetallic compound state disappears. Therefore, desired post-coating corrosion resistance. It is not possible to obtain a hot pressed member having. In particular, the swelling of the coating film from the end face and the defective portion of the coating film increases, and the occurrence of red rust becomes remarkable in the scratched portion. Therefore, the amount of Zn adhered is set to 5 g / m 2 or more.
- the amount of Zn adhered is set to 35 g / m 2 or less.
- the Zn adhesion amount is preferably 10 g / m 2 or more, more preferably 15 g / m 2 or more, and further preferably 17 g / m 2 or more. ..
- the amount of Zn adhered is preferably 28 g / m 2 or less, more preferably 25 g / m 2 or less, and even more preferably 20 g / m 2 or less.
- the Zn adhesion amount on the other surface of the hot pressing steel sheet (the surface opposite to the surface where the Zn adhesion amount of the Zn-based plating layer is 5 to 35 g / m 2 ) to 40 to 120 g / m 2 .
- a hot pressed member having excellent weldability can be obtained.
- the amount of Zn adhered is set to 40 g / m 2 or more.
- the amount of Zn adhered is 120 g / m 2 or less.
- the amount of Zn adhered is preferably 45 g / m 2 or more, more preferably 55 g / m 2 or more, and further preferably 65 g / m 2 or more.
- the amount of Zn adhered is 120 g / m 2 or less.
- the amount of Zn adhered is preferably 100 g / m 2 or less, more preferably 90 g / m 2 or less, and even more preferably 75 g / m 2 or less.
- the Zn-based plating layer in the hot-pressed steel sheet of the present invention may be a single-layer Zn-based plating layer, but it is a lower layer film depending on the purpose as long as it does not affect the action and effect of the present invention.
- an upper layer film may be provided.
- a base plating layer mainly composed of Ni is exemplified.
- a hot pressed member exceeding 1470 MPa class after hot pressing in order to obtain a hot pressed member exceeding 1470 MPa class after hot pressing, it is used as a base steel sheet for a Zn-based plating layer in a steel sheet for hot pressing, for example, by mass%, C: 0.20. ⁇ 0.50%, Si: 0.1 ⁇ 0.5%, Mn: 1.0 ⁇ 3.0%, P: 0.02% or less, S: 0.01% or less, Al: 0.1%
- a steel sheet containing N: 0.01% or less and having a component composition in which the balance is composed of Fe and unavoidable impurities can be used.
- the steel plate may be either a cold-rolled steel plate or a hot-rolled steel plate. The reasons for limiting each component are described below.
- C 0.20 to 0.50% C improves the strength by forming martensite or the like as a steel structure.
- the amount of C is preferably 0.20% or more.
- the amount of C is preferably 0.50% or less.
- Si 0.1-0.5% Si is an effective element for strengthening steel to obtain a good material. For that purpose, 0.1% or more is preferable. On the other hand, when the amount of Si exceeds 0.5%, the ferrite is stabilized, so that the quenchability is lowered. Therefore, the amount of Si is preferably 0.5% or less.
- Mn 1.0-3.0%
- Mn is an element effective for obtaining strength after cooling in a wide cooling rate range. In order to secure mechanical properties and strength, it is preferable to contain Mn amount of 1.0% or more. On the other hand, when the amount of Mn exceeds 3.0%, not only the cost increases but also the effect is saturated. Therefore, the amount of Mn is preferably 3.0% or less.
- the amount of P is preferably 0.02% or less. Further, when the P amount is 0.001% or less, the effect of improving the balance between strength and ductility is saturated and only the refining cost is increased. Therefore, the P amount is 0.001% in terms of the refining cost. The above is preferable.
- S 0.01% or less S becomes inclusions such as MnS and causes deterioration of impact resistance and cracking along the metal flow of the welded portion. Therefore, it is desirable to reduce it as much as possible, and the amount of S is preferably 0.01% or less. Further, in order to secure good stretch flangeability, the amount of S is more preferably 0.005% or less. Further, in terms of refining cost, the amount of S is preferably 0.001% or more.
- the amount of Al is preferably 0.1% or less. Further, in terms of refining cost, the Al amount is preferably 0.0001% or more.
- the amount of N is preferably 0.01% or less. Further, in terms of refining cost, the amount of N is preferably 0.0001% or more.
- Nb 0.05% or less
- Ti 0.05% or less
- B 0.0002 to 0.005
- %, Cr 0.1 to 0.3%
- Sb 0.003 to 0.03%
- Nb 0.05% or less Nb is an effective component for strengthening steel, but if it is contained in an excessive amount, the shape freezing property is lowered. Therefore, when Nb is contained, the amount of Nb is preferably 0.05% or less. Further, in terms of refining cost, the amount of Nb is preferably 0.0001% or more.
- Ti 0.05% or less Ti is also effective for strengthening steel like Nb, but there is a problem that shape freezing property is lowered if it is contained in an excessive amount. Therefore, when Ti is contained, the amount of Ti is preferably 0.05% or less. Further, in terms of refining cost, the amount of Ti is preferably 0.0001% or more.
- B 0.0002 to 0.005% Since B has an effect of suppressing the formation and growth of ferrite from the austenite grain boundaries, the amount of B is preferably 0.0002% or more. On the other hand, the excessive content of B greatly impairs moldability. Therefore, when B is contained, the amount of B is preferably 0.0002% or more. Further, it is preferably 0.005% or less.
- the amount of Cr is preferably 0.1% or more.
- the amount of Cr is preferably 0.1% or less.
- Sb 0.003 to 0.03%
- Sb has the effect of suppressing decarburization of the surface layer of the steel sheet in the annealing process of the original plate for plating. In order to exhibit such an effect, the content of 0.003% or more is required. On the other hand, if the amount of Sb exceeds 0.03%, the rolling load is increased and the productivity is lowered. Therefore, when Sb is contained, the amount of Sb is preferably 0.003% or more. The amount of Sb is preferably 0.03% or less.
- the rest other than the above consists of Fe and unavoidable impurities.
- the manufacturing conditions for the steel sheet for hot pressing of the present invention are not particularly specified, but desirable manufacturing conditions will be described below.
- Steel with the above-mentioned components is cast, and the obtained hot piece slab is directly or heated, or the cold piece is reheated for hot rolling. At that time, almost no change in characteristics is observed between the direct rolling of the hot piece slab and the rolling after reheating.
- the reheating temperature is not particularly limited, but is preferably in the range of 1000 ° C to 1300 ° C in consideration of productivity.
- Hot rolling can be performed by either a normal hot rolling process or a continuous hot rolling process in which slabs are joined and rolled in finish rolling.
- the rolling end temperature during hot rolling be equal to or higher than the Ar 3 transformation point in consideration of productivity and plate thickness accuracy. Cooling after hot rolling is performed by a usual method, but the take-up temperature at that time is preferably 550 ° C. or higher from the viewpoint of productivity, and if the take-up temperature is too high, pickling property It is desirable to keep the temperature below 750 ° C. because it deteriorates. Pickling and cold rolling may be carried out by conventional methods.
- Subsequent film formation method for zinc-based plating is not limited, and is appropriately selected depending on the alloy system.
- Pure zinc or zinc-nickel alloy plating is preferably formed by an electric plating method, and zinc-aluminum alloy plating is preferably formed by a hot-dip plating method.
- zinc-magnesium alloy plating film formation by vacuum vapor deposition is preferable.
- by performing an alloying treatment after plating it is possible to efficiently obtain plating in which iron is alloyed.
- Regarding the atmosphere in the plating process it is possible to perform plating under normal conditions in both continuous plating equipment with a non-oxidizing furnace and continuous plating equipment without a non-oxidizing furnace, and special control is required only for this steel sheet. Since it does not, it does not hinder productivity.
- the control of the amount of Zn adhesion on one surface (front surface) of the steel sheet and the other surface (back surface) of the steel sheet in the case of the electroplating method, either or both of the current density and the energization time are changed on each surface. Therefore, it may be adjusted so that the amount of Zn adhered is different. Further, in the case of the hot-dip plating method, the flow rate of the wiping gas at the time of gas wiping after immersion in the plating bath may be changed on each surface to adjust so that the amount of Zn adhered is different.
- a Zn-based plating layer is provided on both sides of a steel sheet, the amount of Zn adhered to one surface of the steel sheet is 5 to 35 g / m 2 , and the other surface of the steel sheet is formed.
- the temperature of the hot-pressed steel sheet having a Zn adhesion of 40 to 120 g / m 2 is raised from room temperature to the temperature range of Ac 3 transformation point to 1000 ° C. in a time of 5 seconds or more and 600 seconds or less.
- a desired hot-pressed member can be obtained by holding the Ac 3 transformation point in a temperature range of 1000 ° C. for a time of 300 seconds or less and then hot-pressing.
- the Zn-based plating layer described in 1) above can be obtained. If the heating temperature is lower than the Ac 3 transformation point, it may not be possible to obtain the strength required for the hot pressing member, and if the heating temperature exceeds 1000 ° C., Zn may disappear.
- the element symbol in the above formula means the content (mass%) of each element, and is zero when the element is not contained.
- the time required from room temperature to the above heating temperature is 600 seconds or less in order to maintain the corrosion resistance after painting by leaving the intermetallic compound phase.
- the time required to reach the heating temperature from room temperature is preferably 450 seconds or less, more preferably 300 seconds or less.
- the heating rate is excessively high, that is, the time from room temperature to the heating temperature is too short, not only the residual amount of the intermetallic compound is saturated, but also the plating layer is melted during the heat treatment, so that the plating layer is melted. It may cause a drooping pattern and deteriorate the appearance. From this, regarding the heating time, the time required from room temperature to the heating temperature is 5 seconds or more, preferably 10 seconds or more, more preferably 100 seconds or more, and further preferably 150 seconds or more.
- the holding time is set to 300 seconds or less.
- the holding time is more preferably 180 seconds or less, further preferably 60 seconds or less, and most preferably no holding.
- the method of heating the hot pressed steel sheet is not limited in any way, and examples thereof include furnace heating by an electric furnace or a gas furnace, energization heating, induction heating, high frequency heating, and flame heating.
- hot pressing is performed, and at the same time as or immediately after processing, cooling is performed using a refrigerant such as a die or water to manufacture a hot pressed member.
- a refrigerant such as a die or water to manufacture a hot pressed member.
- the hot pressing conditions are not particularly limited, but pressing can be performed at 600 to 800 ° C., which is a general hot pressing temperature range.
- the above-mentioned base steel sheet was subjected to a Zn-based plating layer on both sides (front surface and back surface) of the steel sheet by the following electroplating method or hot-dip plating method to obtain a steel sheet for hot pressing.
- the current density is 10 to 100 A / dm in a plating bath consisting of zinc sulfate heptahydrate 115 g / L, nickel sulfate hexahydrate 230 g / L, and sodium sulfate 55 g / L at a pH of 1.4 and a bath temperature of 50 ° C. 2.
- a plating bath consisting of zinc sulfate heptahydrate 115 g / L, nickel sulfate hexahydrate 230 g / L, and sodium sulfate 55 g / L at a pH of 1.4 and a bath temperature of 50 ° C. 2.
- the steel sheet No. 1 shown in Table 1-1 was obtained.
- the Zn-based plating layers of 19 and 20 were formed.
- the Zn-based plating layers having different adhesions on the front surface and the back surface of the steel sheet were obtained by changing the current density for each surface.
- the amount of Zn adhered to the Zn-based plating layer on the surface of the hot-pressed steel sheet is determined by punching out the hot-pressed steel sheet to be evaluated, collecting three 48 mm ⁇ samples, and weighing each sample.
- the non-evaluation surface on the opposite side to the one surface for evaluating the Zn adhesion amount is masked. Then, by immersing each sample in a solution prepared by adding 3.5 g of hexamethylenetetramine to 1 L of a 500 mL 35% hydrochloric acid aqueous solution for 10 minutes, the Zn-based plating layer is dissolved and each sample is weighed again. ..
- the metal components in the above-mentioned hydrochloric acid solution sample in which the plating layer was dissolved were quantified by inductively coupled plasma emission spectrometry (ICP-AES), and the plating adhesion amount and Zn adhesion amount of the hot pressed steel sheet were identified.
- ⁇ Fold plating method> The cold-rolled steel sheet was immersed in a hot-dip Zn-Al (-Mg) -based plating bath by a hot-dip plating facility, and then N2 gas wiping was performed. A Zn—Al-based plated steel sheet for hot pressing of 21 to 27 was produced. The Zn-based plating layers having different amounts of adhesion on the front surface and the back surface of the steel sheet were obtained by adjusting the flow rate of the wiping gas for each surface. Level No. in Table 1-1. 23 and 24 were produced by subjecting a hot pressed steel sheet to which molten Zn-Al plating was applied by alloying treatment by heating the steel sheet to 500 ° C. with an energization heating device.
- the amount of Zn adhered to the Zn-based plating layer on the surface of the hot-pressed steel sheet is determined by punching out the hot-pressed steel sheet to be evaluated, collecting three 48 mm ⁇ samples, and weighing each sample. Then, in each sample, the non-evaluation surface on the opposite side to the one surface for evaluating the Zn adhesion amount is masked. Then, by immersing each sample in a solution prepared by adding 3.5 g of hexamethylenetetramine to 1 L of a 500 mL 35% hydrochloric acid aqueous solution for 10 minutes, the Zn-based plating layer is dissolved and each sample is weighed again. ..
- the metal components in the above-mentioned hydrochloric acid solution sample in which the plating layer was dissolved were quantified by inductively coupled plasma emission spectrometry (ICP-AES), and the plating adhesion amount and Zn adhesion amount of the hot pressed steel sheet were identified.
- ICP-AES inductively coupled plasma emission spectrometry
- a 100 mm ⁇ 200 mm test piece was collected from the hot-pressed steel sheet obtained by the above plating treatment, and heat-treated by an electric furnace or energization heating.
- the heat treatment conditions (heating temperature, temperature rise time, holding temperature, holding time) are shown in Table 1-2.
- the test piece after the heat treatment was taken out from an electric furnace or an energization heating furnace, and immediately hot pressed using a hat mold at a molding start temperature of 700 ° C. to obtain a hot pressed member.
- the shape of the obtained hot pressed member is a flat portion length of 100 mm on the upper surface, a flat portion length of 50 mm on the side surface, and a flat portion length of 50 mm on the lower surface. Further, the bending R of the mold is 7R for both the upper shoulders and the lower shoulders.
- the plating adhesion amount, Zn adhesion amount and average line roughness Ra were measured, resistance spot weldability, and post-painting corrosion resistance were evaluated.
- the plating adhesion amount and Zn adhesion amount of the hot pressed member shall be obtained by the following method.
- the hot pressed member to be evaluated is punched, three samples having a diameter of 48 mm ⁇ are collected, and each sample is weighed. Then, in each sample, the non-evaluation surface on the opposite side to the one surface for evaluating the Zn adhesion amount is masked.
- each sample was immersed in a solution prepared by adding 20 g of ammonium dichromate to 1 L for 60 minutes to dissolve only the oxide layer. Then, by immersing each sample in a solution prepared by adding 3.5 g of hexamethylenetetramine to 1 L of a 500 mL 35% hydrochloric acid aqueous solution for 10 minutes, the Zn-based plating layer is dissolved and each sample is weighed again. ..
- the metal components in the above-mentioned hydrochloric acid solution sample in which the plating layer was dissolved were quantified by inductively coupled plasma emission spectrometry (ICP-AES), and the plating adhesion amount and Zn adhesion amount of the hot press member were identified.
- ICP-AES inductively coupled plasma emission spectrometry
- ⁇ Resistance spot weldability> In order to evaluate the resistance spot weldability of the hot press member, a test piece of 30 mm ⁇ 50 mm was cut out from the flat portion on the upper surface of the obtained hot press member, and the resistance spot weldability was improved by using a two-plate set of the same type. gone. An AC resistance spot welder was used as the welder, and a DR ⁇ 16 type Cr-Cu electrode with a tip diameter of 6 mm was used as the electrode. The pressing force was 3.5 kN and the energizing time was 0.42 seconds. The welding current was increased from 3.0 kA in increments of 0.1 kA until dust was generated, and the maximum current value at which dust was not generated was recorded.
- the nugget diameter is measured by observing the cross section of the welded part of the test piece after welding, and the minimum current at which the nugget diameter is 4 ⁇ t (mm) or more with respect to the plate thickness t (mm) and the maximum without dust generation.
- the difference in current value was taken as the appropriate current range for welding.
- the appropriate current range was judged according to the following criteria, and ⁇ or ⁇ was regarded as acceptable. The evaluation results are shown in Table 1-2.
- the zirconium-based chemical conversion treatment is performed under standard conditions using PLM2100 manufactured by Nihon Parkerizing Co., Ltd., and the electrodeposition coating is performed using the cationic electrodeposition coating Electron GT100 manufactured by Kansai Paint Co., Ltd. so that the coating film thickness is 10 ⁇ m, and the baking conditions are as follows. It was held at 170 ° C. for 20 minutes. Next, the hot pressed member subjected to the zirconium-based chemical conversion treatment and electrodeposition coating was subjected to a corrosion test (SAE-J2334), and the corrosion state after 30 cycles was evaluated. For general parts that have not been cross-cut, the judgment was made according to the following criteria, and ⁇ or ⁇ was judged as acceptable.
- the hot pressed member of the present invention is excellent in corrosion resistance after painting and resistance spot weldability. Further, with the hot-pressed steel sheet of the present invention, it is possible to obtain a hot-pressed member having excellent post-coating corrosion resistance and resistance spot weldability.
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Abstract
Description
(1)熱間プレス部材の塗装後耐食性を向上させるためには、熱間プレス部材における、主として外観腐食を評価される面のZn付着量を5~35g/m2とし、Znめっき層表面の平均線粗さRaを2.5μm以下とすることが有効である。さらに、熱間プレス部材の抵抗スポット溶接性を向上させるためには、熱間プレス部材における、主として抵抗スポット溶接の合わせ面となる面のZnめっき層表面の平均線粗さRaを3.5μm以上とすることが有効である。
(2)一方の面のZn付着量が5~35g/m2であり、もう一方の面のZn付着量が40~120g/m2であるZn系めっき層を有する熱間プレス用鋼板を熱間プレスすることにより、塗装後耐食性と、抵抗スポット溶接性に優れる熱間プレス部材を得ることができる。
[1]鋼板の両面に、Zn系めっき層を備えた熱間プレス部材であって、
鋼板の一方の面のZn系めっき層のZn付着量が5~35g/m2であり、
かつZn系めっき層表面の平均線粗さRaが2.5μm以下であり、
鋼板のもう一方の面のZn系めっき層表面の平均線粗さRaが3.5μm以上である、
熱間プレス部材。
[2]鋼板の両面に、Zn系めっき層を備えた熱間プレス用鋼板であって、
鋼板の一方の面のZn系めっき層のZn付着量が5~35g/m2であり、
鋼板のもう一方の面のZn系めっき層のZn付着量が40~120g/m2である、
熱間プレス用鋼板。
[3]鋼板の両面に、Zn系めっき層を備え、
鋼板の一方の面のZn系めっき層のZn付着量が5~35g/m2であり、
鋼板のもう一方の面のZn系めっき層のZn付着量が40~120g/m2である
熱間プレス用鋼板を、
室温からAc3変態点~1000℃の温度範囲に5秒以上600秒以下の時間で昇温し、さらに、Ac3変態点~1000℃の温度範囲に300秒以下の時間保持した後、
熱間プレスする、熱間プレス部材の製造方法。
本発明の熱間プレス部材は、鋼板の両面にZn系めっき層を備え、一方の面のZn系めっき層のZn付着量が5~35g/m2であり、かつZn系めっき層表面の平均線粗さRaが2.5μm以下であり、もう一方の面のZn系めっき層表面の平均線粗さRaが3.5μm以上である。本発明は、熱間プレス部材の表裏面での表面凹凸の大きさに意図的に差を設けることを最大の特徴とする。
本発明の熱間プレス用鋼板は、鋼板の両面に、Zn系めっき層を備え、一方の面のZn系めっき層のZn付着量が5~35g/m2であり、もう一方の面のZn系めっき層のZn付着量が40~120g/m2である。Zn系めっき層を構成する金属は、純亜鉛であってもよく、その他合金元素を含有するものであってもよい。たとえば、Mg、Al、Cr、Co、Niから選択される元素を0.1~20%含有させることで、より一層の耐食性の向上を見込むことができる。また、Zn系めっき層は酸化物が分散したものでもよく、SiO2またはAl2O3のナノ粒子を0.1~10%含有するものが例示される。
Cは、鋼組織としてマルテンサイトなどを形成させることで強度を向上させる。1470MPa級を超えるような強度を得るためには、C量は、0.20%以上が好ましい。一方、0.50%を超えるとスポット溶接部の靱性が低下する。したがって、C量は0.50%以下とすることが好ましい。
Siは鋼を強化して良好な材質を得るのに有効な元素である。そのためには0.1%以上が好ましい。一方、Si量が0.5%を超えるとフェライトが安定化されるため、焼き入れ性が低下する。したがって、Si量は0.5%以下とすることが好ましい。
Mnは冷却後の強度確保を広い冷却速度範囲で得るために有効な元素である。機械特性や強度を確保するためはMn量を1.0%以上含有させることが好ましい。一方、Mn量が3.0%を超えると、コストが上昇するばかりでなく効果は飽和する。したがって、Mn量は3.0%以下とすることが好ましい。
P量が0.02%を超えると鋳造時のオーステナイト粒界へのP偏析に伴う粒界脆化により、局部延性の劣化を通じて強度と延性のバランスが低下する。したがって、P量は0.02%以下とすることが好ましい。また、P量を0.001%以下とすると、前記強度と延性のバランスの改善効果が飽和し、精錬コスト増となるのみであることから、精錬コストの点で、P量は0.001%以上とすることが好ましい。
SはMnSなどの介在物となって、耐衝撃性の劣化や溶接部のメタルフローに沿った割れの原因となる。したがって、極力低減することが望ましく、S量は、0.01%以下とすることが好ましい。また、良好な伸びフランジ性を確保するため、S量は、より好ましくは0.005%以下とする。また、精錬コストの点で、S量は0.001%以上とすることが好ましい。
Al量が0.1%を超えると、素材の鋼板のブランキング加工性や焼入れ性を低下させる。したがって、Al量は0.1%以下とすることが好ましい。また、精錬コストの点で、Al量は0.0001%以上とすることが好ましい。
N量が0.01%を超えると、熱間圧延時や熱間プレス前の加熱時にAlNの窒化物を形成し、素材の鋼板のブランキング加工性や焼入れ性を低下させる。したがって、N量は0.01%以下とすることが好ましい。また、精錬コストの点で、N量は0.0001%以上とすることが好ましい。
Nbは鋼の強化に有効な成分であるが、過剰に含まれると形状凍結性が低下する。したがって、Nbを含有させる場合は、Nb量は0.05%以下とすることが好ましい。また、精錬コストの点で、Nb量は0.0001%以上とすることが好ましい。
TiもNbと同様に鋼の強化には有効であるが、過剰に含まれると形状凍結性が低下するという課題がある。したがって、Tiを含有させる場合は、Ti量は0.05%以下とすることが好ましい。また、精錬コストの点で、Ti量は0.0001%以上とすることが好ましい。
Bはオーステナイト粒界からのフェライト生成および成長を抑制する作用を有するため、B量は0.0002%以上の含有が好ましい。一方、過剰なBの含有は成形性を大きく損なう。したがって、Bを含有させる場合は、B量は0.0002%以上とすることが好ましい。また、0.005%以下とすることが好ましい。
Crは鋼の強化および焼き入れ性を向上させるために有用である。このような効果を発現するためには、Cr量は0.1%以上の含有が好ましい。一方、合金コストが高いためCr量を0.3%超えで含有すると大幅なコストアップを招く。したがって、Crを含有させる場合は、Cr量は0.1%以上とすることが好ましい。また、Cr量は0.3%以下とすることが好ましい。
Sbはめっき用原板の焼鈍工程で、鋼板表層の脱炭を抑止する効果がある。このような効果を発現するためには0.003%以上の含有が必要である。一方、Sb量が0.03%を超えると圧延荷重の増加を招くため生産性を低下させる。したがって、Sbを含有させる場合は、Sb量は0.003%以上が好ましい。また、Sb量は0.03%以下とすることが好ましい。
本発明の熱間プレス用鋼板の製造条件については特に規定しないが、以下に望ましい製造条件について説明する。前述したような成分の鋼を鋳造し、得られた熱片スラブを直接または加熱した後、あるいは冷片を再加熱して熱間圧延を施す。その際、熱片スラブを直接圧延することと再加熱後に圧延することでの特性変化はほとんど認められない。また、再加熱温度は特に限定しないが、生産性を考慮して1000℃から1300℃の範囲とすることが好ましい。熱間圧延は通常の熱延工程、あるいは仕上圧延においてスラブを接合し圧延する連続化熱延工程のどちらでも可能である。熱間圧延の際の圧延終了温度は生産性や板厚精度を考慮してAr3変態点以上とすることが望ましい。熱間圧延後の冷却は通常の方法で行うが、その際の巻取温度は生産性の観点からは550℃以上とすることが好ましく、また、巻取温度が高すぎる場合には酸洗性が劣化するため750℃以下とすることが望ましい。酸洗、冷間圧延は常法でよい。
本発明において、鋼板の両面に、Zn系めっき層を備え、鋼板の一方の面のZn付着量が5~35g/m2であり、鋼板のもう一方の面のZn付着量が40~120g/m2である熱間プレス用鋼板に対して、室温からAc3変態点~1000℃の温度範囲に5秒以上600秒以下の時間で昇温し、さらに、Ac3変態点~1000℃の温度範囲に300秒以下の時間保持した後、熱間プレスすることにより、所望の熱間プレス部材を得ることができる。
Ac3変態点(℃)=910-203C1/2+44.7Si-4Mn+11Cr
上記式における元素記号は、各元素の含有量(質量%)を意味し、当該元素が含有されていない場合にはゼロとする。
硫酸亜鉛・7水和物115g/L、硫酸ニッケル・6水和物230g/L、硫酸ナトリウム55g/LからなるpH1.4、浴温50℃のめっき浴中で電流密度を10~100A/dm2、通電時間5~60秒と変化させて電気めっき処理を施すことで、表1-1に示す鋼板No.1~18の、Ni含有率12%で、Zn付着量の異なるZn-Ni系合金めっき層を形成させた。また、硫酸亜鉛・7水和物200g/L、硫酸ナトリウム55g/LからなるpH1.4、浴温50℃のめっき浴中で電気めっき処理を施すことで、表1-1に示す鋼板No.19、20のZn系めっき層を形成させた。鋼板の表面と裏面で付着量の異なるZn系めっき層は、面ごとに電流密度を変化させることにより得た。なお、熱間プレス用鋼板の表面のZn系めっき層のZn付着量は、評価対象とする熱間プレス用鋼板を打抜き加工して、48mmφの試料3つを採取し、各試料を計量する。その後、各試料においてZn付着量を評価する片面とは反対側の非評価面をマスキングする。その後、ヘキサメチレンテトラミン3.5gを添加した500mLの35%塩酸水溶液を1Lにメスアップした溶液に、各試料を10分間浸漬することにより、Zn系めっき層を溶解し、各試料を再度計量する。めっき層を溶解した上記の塩酸溶液試料中の金属成分を、誘導結合プラズマ発光分析法(ICP-AES)により定量し、熱間プレス用鋼板のめっき付着量ならびにZn付着量を同定した。
冷延鋼板を、溶融めっき設備によって、溶融Zn-Al(-Mg)系めっき浴中に浸漬し、その後N2ガスワイピングを行って、表1-1の水準No.21~27の熱間プレス用Zn-Al系めっき鋼板を作製した。鋼板の表面と裏面で付着量の異なるZn系めっき層は、ワイピングガスの流量を面ごとに調整することにより得た。表1-1の水準No.23、24については、溶融Zn-Alめっきを付与した熱間プレス用鋼板に対し、通電加熱装置で鋼板を500℃まで加熱することによる合金化処理を施すことで作製した。なお、熱間プレス用鋼板の表面のZn系めっき層のZn付着量は、評価対象とする熱間プレス用鋼板を打抜き加工して、48mmφの試料3つを採取し、各試料を計量する。その後、各試料においてZn付着量を評価する片面とは反対側の非評価面をマスキングする。その後、ヘキサメチレンテトラミン3.5gを添加した500mLの35%塩酸水溶液を1Lにメスアップした溶液に、各試料を10分間浸漬することにより、Zn系めっき層を溶解し、各試料を再度計量する。めっき層を溶解した上記の塩酸溶液試料中の金属成分を、誘導結合プラズマ発光分析法(ICP-AES)により定量し、熱間プレス用鋼板のめっき付着量ならびにZn付着量を同定した。
次いで、上記のめっき処理により得られた熱間プレス用鋼板から100mm×200mmの試験片を採取し、電気炉もしくは通電加熱によって加熱処理を行った。熱処理条件(加熱温度、昇温時間、保持温度、保持時間)を表1-2に示す。熱処理後の試験片を電気炉または通電加熱炉から取り出し、直ちにハット型金型を用いて成形開始温度700℃で熱間プレスを行うことにより熱間プレス部材を得た。なお、得られた熱間プレス部材の形状は上面の平坦部長さ100mm、側面の平坦部長さ50mm、下面の平坦部長さ50mmである。また、金型の曲げRは上面の両肩、下面の両肩いずれも7Rである。
得られた熱間ブレス部材について、めっき付着量、Zn付着量および平均線粗さRaを測定し、皮膜構造を評価した。熱間プレス部材のめっき付着量、Zn付着量は、以下の方法で求めるものとする。評価対象とする熱間プレス部材を打抜き加工して、48mmφの試料3つを採取し、各試料を計量する。その後、各試料においてZn付着量を評価する片面とは反対側の非評価面をマスキングする。その後、重クロム酸アンモニウム20gを1Lにメスアップした溶液に、各試料を60分間浸漬することにより、酸化物層のみを溶解させた。その後、ヘキサメチレンテトラミン3.5gを添加した500mLの35%塩酸水溶液を1Lにメスアップした溶液に、各試料を10分間浸漬することにより、Zn系めっき層を溶解し、各試料を再度計量する。めっき層を溶解した上記の塩酸溶液試料中の金属成分を、誘導結合プラズマ発光分析法(ICP-AES)により定量し、熱間プレス部材のめっき付着量およびZn付着量を同定した。
熱間プレス部材の抵抗スポット溶接性を評価するため、得られた熱間プレス部材について、上面の平坦部から30mm×50mmの試験片を切り出し、同種の2枚板組で、抵抗スポット溶接性を行った。溶接機には交流抵抗スポット溶接機を用い、電極にはDRφ16タイプ 先端径6mm Cr-Cu電極を用いた。加圧力は3.5kN、通電時間は0.42秒とした。溶接電流は3.0kAよりチリが発生するまで0.1kA刻みで上昇させ、チリの発生しない最大の電流値を記録した。溶接後の試験片の溶接部の断面観察よりナゲット径を測定し、板厚t(mm)に対してナゲット径が4√t(mm)以上となる最小の電流と、チリの発生しない最大の電流値の差を、溶接の適正電流範囲とした。適正電流範囲を以下の基準で以下の基準で判定を行い、◎または○を合格とした。評価結果を表1-2に示す。
◎:1.5kA≦適正電流範囲
○:0.8kA≦適正電流範囲<1.5kA
×:0.8kA>適正電流範囲
また、5°の打角を設け、その他の条件は上記と同様に同種の2枚板組で溶接を行い、ナゲット内に生じたクラックの最大長さを断面から測定することにより、溶接部LME割れ長さとした。溶接部LME割れ長さを以下の基準で判定を行い、〇を合格とした。評価結果を表1-2に示す。
〇:20μm≧溶接部LME割れ長さ
△:100μm≧溶接部LME割れ長さ>20μm
×:100μm<溶接部LME割れ長さ
<塗装後耐食性>
熱間プレス部材の塗装後耐食性を評価するため、得られた熱間プレス部材について、上面の平坦部から70mm×150mmの試験片を切り出し、この試験片に対してジルコニウム系化成処理および電着塗装を施した。ジルコニウム系化成処理は、日本パーカライジング社製PLM2100を用いて標準条件で行い、電着塗装は関西ペイント社製カチオン電着塗料エレクトロンGT100を用いて塗装膜厚が10μmとなるように行い、焼付け条件は170℃で20分間保持とした。次いで、ジルコニウム系化成処理および電着塗装を施した熱間プレス部材を腐食試験(SAE-J2334)に供し、30サイクル後の腐食状況の評価を行った。
クロスカットを施していない一般部については、以下の基準で判定を行い、◎または○を合格とした。評価結果を表1-2に示す。
◎:一般部における赤錆発生なし
○:1箇所≦赤錆発生箇所<3箇所
△:3箇所≦赤錆発生箇所<10箇所
×:10箇所≦赤錆発生箇所
クロスカット部(疵部)については、クロスカットからの片側最大膨れ幅を測定して以下の基準で判定を行い、◎または○を合格とした。評価結果を表1-2に示す。
◎:片側最大膨れ幅<1.5mm
○:1.5mm≦片側最大膨れ幅<3.0mm
△:3.0mm≦片側最大膨れ幅<4.0mm
×:4.0mm≦片側最大膨れ幅
Claims (3)
- 鋼板の両面に、Zn系めっき層を備えた熱間プレス部材であって、
鋼板の一方の面のZn系めっき層のZn付着量が5~35g/m2であり、
かつZn系めっき層表面の平均線粗さRaが2.5μm以下であり、
鋼板のもう一方の面のZn系めっき層表面の平均線粗さRaが3.5μm以上である、
熱間プレス部材。 - 鋼板の両面に、Zn系めっき層を備えた熱間プレス用鋼板であって、
鋼板の一方の面のZn系めっき層のZn付着量が5~35g/m2であり、
鋼板のもう一方の面のZn系めっき層のZn付着量が40~120g/m2である、
熱間プレス用鋼板。 - 鋼板の両面に、Zn系めっき層を備え、
鋼板の一方の面のZn系めっき層のZn付着量が5~35g/m2であり、
鋼板のもう一方の面のZn系めっき層のZn付着量が40~120g/m2である
熱間プレス用鋼板を、
室温からAc3変態点~1000℃の温度範囲に5秒以上600秒以下の時間で昇温し、さらに、Ac3変態点~1000℃の温度範囲に300秒以下の時間保持した後、
熱間プレスする、熱間プレス部材の製造方法。
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US18/033,101 US20230407449A1 (en) | 2020-10-28 | 2021-06-29 | Hot-pressed member, steel sheet for hot pressing, and method for manufacturing hot-pressed member |
MX2023004640A MX2023004640A (es) | 2020-10-28 | 2021-06-29 | Miembro prensado en caliente, chapa de acero para prensado en caliente y metodo para fabricar miembro prensado en caliente. |
CN202180070951.4A CN116507760A (zh) | 2020-10-28 | 2021-06-29 | 热压构件和热压用钢板以及热压构件的制造方法 |
EP21885603.7A EP4206363A4 (en) | 2020-10-28 | 2021-06-29 | HOT-PRESSED ELEMENT AND STEEL SHEET FOR HOT-PRESSING AND PRODUCTION METHOD FOR A HOT-PRESSED ELEMENT |
KR1020237012477A KR20230069170A (ko) | 2020-10-28 | 2021-06-29 | 열간 프레스 부재 및 열간 프레스용 강판 그리고 열간 프레스 부재의 제조 방법 |
JP2021549142A JP7173368B2 (ja) | 2020-10-28 | 2021-06-29 | 熱間プレス部材および熱間プレス用鋼板ならびに熱間プレス部材の製造方法 |
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EP (1) | EP4206363A4 (ja) |
JP (1) | JP7173368B2 (ja) |
KR (1) | KR20230069170A (ja) |
CN (1) | CN116507760A (ja) |
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JPS5789494A (en) * | 1980-11-26 | 1982-06-03 | Kawasaki Steel Corp | High corrosion resistant surface-treated steel sheet |
JPH01177348A (ja) * | 1988-01-05 | 1989-07-13 | Kawasaki Steel Corp | 差厚合金化溶融亜鉛めっき鋼板の製造方法 |
JPH03170694A (ja) * | 1989-11-29 | 1991-07-24 | Kobe Steel Ltd | 自動車用防錆鋼板およびその製造方法 |
JPH04378A (ja) * | 1990-04-17 | 1992-01-06 | Nippon Steel Corp | 耐外面腐食性及び耐内面腐食性に優れた合金化溶融亜鉛めっき鋼板 |
JP2004323897A (ja) | 2003-04-23 | 2004-11-18 | Sumitomo Metal Ind Ltd | 熱間プレス成形品およびその製造方法 |
JP2011246801A (ja) | 2009-10-28 | 2011-12-08 | Jfe Steel Corp | 熱間プレス部材およびその製造方法 |
WO2020049833A1 (ja) * | 2018-09-07 | 2020-03-12 | Jfeスチール株式会社 | 熱間プレス用鋼板 |
Family Cites Families (3)
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IT1076494B (it) * | 1975-10-15 | 1985-04-27 | Nat Steel Corp | Procedimento per la produzione di lamiera zincata |
PL2290133T3 (pl) | 2009-08-25 | 2012-09-28 | Thyssenkrupp Steel Europe Ag | Sposób wytwarzania elementu stalowego z antykorozyjną powłoką metalową i element stalowy |
DE102016225681A1 (de) * | 2016-12-20 | 2018-06-21 | Thyssenkrupp Ag | Vergraute Oberfläche zum Zwecke einer verkürzten Aufheizung |
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2021
- 2021-06-29 EP EP21885603.7A patent/EP4206363A4/en active Pending
- 2021-06-29 KR KR1020237012477A patent/KR20230069170A/ko unknown
- 2021-06-29 MX MX2023004640A patent/MX2023004640A/es unknown
- 2021-06-29 US US18/033,101 patent/US20230407449A1/en active Pending
- 2021-06-29 WO PCT/JP2021/024435 patent/WO2022091480A1/ja active Application Filing
- 2021-06-29 CN CN202180070951.4A patent/CN116507760A/zh active Pending
- 2021-06-29 JP JP2021549142A patent/JP7173368B2/ja active Active
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JPS5789494A (en) * | 1980-11-26 | 1982-06-03 | Kawasaki Steel Corp | High corrosion resistant surface-treated steel sheet |
JPH01177348A (ja) * | 1988-01-05 | 1989-07-13 | Kawasaki Steel Corp | 差厚合金化溶融亜鉛めっき鋼板の製造方法 |
JPH03170694A (ja) * | 1989-11-29 | 1991-07-24 | Kobe Steel Ltd | 自動車用防錆鋼板およびその製造方法 |
JPH04378A (ja) * | 1990-04-17 | 1992-01-06 | Nippon Steel Corp | 耐外面腐食性及び耐内面腐食性に優れた合金化溶融亜鉛めっき鋼板 |
JP2004323897A (ja) | 2003-04-23 | 2004-11-18 | Sumitomo Metal Ind Ltd | 熱間プレス成形品およびその製造方法 |
JP2011246801A (ja) | 2009-10-28 | 2011-12-08 | Jfe Steel Corp | 熱間プレス部材およびその製造方法 |
WO2020049833A1 (ja) * | 2018-09-07 | 2020-03-12 | Jfeスチール株式会社 | 熱間プレス用鋼板 |
Non-Patent Citations (1)
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See also references of EP4206363A4 |
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EP4206363A4 (en) | 2024-03-06 |
CN116507760A (zh) | 2023-07-28 |
KR20230069170A (ko) | 2023-05-18 |
US20230407449A1 (en) | 2023-12-21 |
JPWO2022091480A1 (ja) | 2022-05-05 |
MX2023004640A (es) | 2023-05-15 |
JP7173368B2 (ja) | 2022-11-16 |
EP4206363A1 (en) | 2023-07-05 |
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