WO2006054564A1 - 伸びおよび穴拡げ性に優れた高強度鋼板または溶融亜鉛めっき高強度鋼板の製造設備 - Google Patents
伸びおよび穴拡げ性に優れた高強度鋼板または溶融亜鉛めっき高強度鋼板の製造設備 Download PDFInfo
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- WO2006054564A1 WO2006054564A1 PCT/JP2005/020977 JP2005020977W WO2006054564A1 WO 2006054564 A1 WO2006054564 A1 WO 2006054564A1 JP 2005020977 W JP2005020977 W JP 2005020977W WO 2006054564 A1 WO2006054564 A1 WO 2006054564A1
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- equipment
- tempering
- strength steel
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 74
- 239000010959 steel Substances 0.000 title claims abstract description 74
- 239000011701 zinc Substances 0.000 title claims abstract description 14
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 14
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 13
- 238000005496 tempering Methods 0.000 claims abstract description 65
- 238000001816 cooling Methods 0.000 claims abstract description 44
- 238000010791 quenching Methods 0.000 claims abstract description 36
- 230000000171 quenching effect Effects 0.000 claims abstract description 36
- 238000000137 annealing Methods 0.000 claims abstract description 27
- 229910000734 martensite Inorganic materials 0.000 claims abstract description 16
- 238000007747 plating Methods 0.000 claims abstract description 16
- 230000009466 transformation Effects 0.000 claims abstract description 8
- 238000001953 recrystallisation Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 4
- 238000005246 galvanizing Methods 0.000 claims description 21
- 238000004519 manufacturing process Methods 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 claims description 16
- 238000011282 treatment Methods 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 230000006698 induction Effects 0.000 claims description 4
- 239000003595 mist Substances 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- 238000005275 alloying Methods 0.000 description 10
- 229910001335 Galvanized steel Inorganic materials 0.000 description 6
- 239000008397 galvanized steel Substances 0.000 description 6
- 238000009413 insulation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000010960 cold rolled steel Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- YZCKVEUIGOORGS-NJFSPNSNSA-N Tritium Chemical compound [3H] YZCKVEUIGOORGS-NJFSPNSNSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 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
- 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
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229910052722 tritium Inorganic materials 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/573—Continuous furnaces for strip or wire with cooling
-
- 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
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
- C23C2/0224—Two or more thermal pretreatments
-
- 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
- C23C2/26—After-treatment
- C23C2/28—Thermal after-treatment, e.g. treatment in oil bath
-
- 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
Definitions
- the present invention relates to equipment for producing a high-strength steel sheet or a molten zinc-plated high-strength steel sheet excellent in elongation and hole expansibility.
- JP-A-2001-192768, JP-A-2001-200338, JP-A-2001-3150, JP-A-2001-207235, JP-A-2001 1207207 TRI P steel is a technology that uses tempered martensite and performs two annealing heat treatments according to Japanese Patent Laid-Open No. 2002-38248, Japanese Patent Publication No. 2002-309334, and Japanese Patent Laid-Open No. 2002-302734.
- proposals have been made to improve hole expansibility with composite steel sheets.
- An object of the present invention is to provide a facility capable of efficiently producing a high-strength steel sheet or a molten zinc-plated high-strength steel sheet excellent in elongation and hole expansibility both in terms of cost and time.
- the quenching equipment and the tempering equipment are on separate production lines, and unlike the case where the quenching equipment and the tempering are once cooled to room temperature, a series of continuous processing equipment is provided. Quenching The tempering temperature can be controlled arbitrarily, and the amount and tensile strength of tempered martensite, which play a major role in securing and improving the elongation and hole expansion ratio, can be controlled arbitrarily.
- the gist of the present invention is as follows.
- continuous hot dip galvanizing treatment equipment In continuous annealing equipment, continuous hot dip galvanizing treatment equipment or their combined facilities, or after being continuously attached to them, after recrystallization, or after recrystallization and after hot dip galvanizing treatment It is characterized by arranging a quenching equipment that can cool the steel sheet to a temperature range below the martensite transformation point, a tempering equipment that keeps the steel sheet tempered, and a recooling equipment that cools the steel sheet to 100 or less. Manufacturing equipment for high-strength steel sheets with high elongation and hole expansibility or hot-dip galvanized high-strength steel sheets.
- the tempering temperature rise ⁇ between the quenching equipment and the tempering equipment falls within the range of the following formula ( ⁇ ) obtained from the tensile strength TS after tempering and the hole expansion ratio ⁇ , Temperature before tempering ⁇ () ⁇ Elongation and hole as described in (1), which falls within the range of the following formula ( ⁇ ) obtained from tensile strength TS after tempering and hole expansion ratio ⁇ Equipment for manufacturing high-strength steel sheets with high spreadability or high strength steel sheets with hot-dip galvanized steel.
- T Pre-tempering temperature T (V) ⁇ ⁇ : Tempering temperature rise ()
- the growth described in (1) or (2) is characterized in that the cooling method of the quenching equipment is one of air-water cooling, mist cooling, water spray cooling, and dip water cooling. And equipment for manufacturing high-strength steel sheets or hot-dip galvanized high-strength steel sheets with excellent hole expansibility.
- FIG. 1 is an explanatory view showing a production facility for a high-strength steel sheet or hot-dip galvanized high-strength steel sheet excellent in elongation and hole expansibility according to the present invention.
- Figure 2 is an explanatory diagram showing the relationship between the pre-tempering temperature and T S at a final hole expansion value of 45%.
- Fig. 3 is an explanatory diagram showing the relationship between the pre-tempering temperature and T S at a final hole expansion value level of 55%.
- FIG. 4 is an explanatory diagram showing the relationship between the temperature before tempering and TS at the final hole expansion value level of 65%.
- FIG. 5 is an explanatory diagram showing the relationship between the elongation and the hole expansion rate between the present invention and the conventional method.
- Fig. 1 shows an embodiment of the present invention, as an equipment for producing a high-strength steel sheet or a hot-dip galvanized high-strength steel sheet excellent in elongation and hole expansibility. It is the schematic which shows the concept of the combined production equipment with manufacture of a hot dip galvanized steel plate.
- the manufacturing equipment for high strength steel sheet or hot dip galvanizing in the present invention includes annealing heating equipment 1, annealing cooling equipment 2, heat insulation equipment 3, hot dip galvanizing treatment equipment 4, alloying equipment 5, quenching Equipment 6, Tempering Equipment 7 and recooling equipment 8 are arranged in sequence.
- the solid arrow line indicates the pass line when manufacturing hot-dip galvanized steel sheets
- the dotted arrow line indicates the pass line when annealing cold-rolled steel sheets or hot-rolled steel sheets. Indicates a pass line that bypasses the mating equipment and returns to the original pass line before the alloying or quenching equipment.
- Example 1 When manufacturing a hot-rolled or cold-rolled high-strength steel sheet
- a high-strength steel sheet that is particularly excellent in elongation and hole expansibility with a hot-rolled or cold-rolled steel sheet for example, in mass%, C: 0.01 to 0.3%, S i: 0.005 to 2%, ⁇ : 0.
- a hot-rolled or cold-rolled steel sheet containing the remaining Fe and unavoidable impurities is heated in an annealing heating facility 1 at a temperature of Ac, to Ac 3 + lOOt for 30 seconds to 30 minutes, and then an annealing cooling facility Cool to 450 to 600 at a cooling rate of 1 ° C / s or more at 2.
- the hot-dip galvanizing treatment is performed by passing through route a.
- the temperature is raised to 200 to 500 ° C in tempering equipment 7 1 Hold for s ⁇ 5 minutes, then cool to 100 ° C or less with re-cooling facility 8 at a cooling rate of S ⁇ Z s or higher.
- the component ranges, temperature conditions, and the like are preferable ranges and are not particularly limited thereto.
- Example 2 When manufacturing high-strength steel sheet with hot-dip galvanized steel, quenching and tempering after hot-dip galvanizing
- hot-dip galvanized high-strength steel sheets especially hot-dip galvanized high-strength steel sheets with excellent elongation and hole expansibility
- C 0.01 to 0.3%
- Si 0.005 to 2%
- Mn 0.1 to 3.3%
- P 0.001 to 0.06%
- S 0.001 to 0.01%
- A1 0.01 to 1.8%
- N containing from 0.0005 to 0.01 percent
- the balance being Fe and unavoidable impurities or Ranaru be plated
- Ac at annealing heating equipment 1 and the temperature in the heating 30 seconds to 30 minutes at ⁇ Ac 3 + 100
- the component ranges, temperature conditions, and the like are preferable ranges, and are not particularly limited thereto.
- hot-cold or cold-rolled hot-dip galvanized high-strength steel sheets especially hot-dip galvanized high-strength steel sheets with excellent elongation and hole expansibility, for example, in mass%, C: 0.01-0. 3%, Si: 0.005 to 2%, Mn: 0.1 to 3.3%, P: 0.001 to 0.06%, S: 0.001 to 0.01%, A1: 0.01 to 1.8%, N: 0.0005 to 0.01%, the balance Fe
- the stencil sheet made of unavoidable impurities is heated in an annealing heating facility 1 at a temperature of Ac, to Ac 3 +100 for 30 seconds to 30 minutes, and then the annealing cooling facility 2 is replaced with the quenching facility in Example 2.
- Use as tempering equipment over 200 and over 500 Raise the temperature to the following temperature and hold for I s for 5 minutes.
- the hot-dip galvanizing treatment equipment 4 is passed through to apply a predetermined amount of hot-dip galvanizing, and if necessary, the alloying equipment 5 is used for alloying treatment.
- the tempering equipment 7 is an empty plate and is not heated.
- quenching equipment 6 and tempering equipment 7 should be cooled or heated with an empty plate, or actively cooled Or use it as appropriate according to the construction of the hot-dip zinc plating layer, such as keeping it warm without heating.
- the component ranges, temperature conditions, and the like are preferable ranges, and are not particularly limited thereto.
- the arrangement of quenching and tempering equipment is continuous annealing equipment, continuous molten zinc plating equipment or their combined equipment, or they are continuously provided together. Furthermore, in the case of continuous annealing equipment, it is preferable to arrange quenching / tempering equipment following the exit side of annealing cooling equipment 2 or the exit side of heat insulation equipment 3 in the case of continuous annealing equipment. In the combination of the hot dip galvanizing equipment, it is preferable to arrange the quenching and tempering equipment after the hot dip galvanizing equipment 4 or the alloying equipment 5.
- the arrangement of the quenching and tempering equipment in a single case or a combination thereof may be adopted.
- the arrangement of quenching / tempering equipment as shown in Fig. 1 can be selected, with or without plating, and quenching before and after plating. preferable.
- Quenching and tempering equipment are arranged in continuous annealing equipment, hot-dip galvanizing equipment, or their combined equipment, or continuously.
- the inventors investigated the relationship between the tempering conditions and the hole expansion ratio, and found that the temperature before tempering, the tempering temperature rise, the tensile strength after tempering, and the hole expansion ratio are as shown in FIG. It turns out that there is a relationship like ⁇ 4. Therefore, these relationships are organized, and the tempering martensite necessary when the pre-tempering temperature, the tempering temperature rise, the tensile strength after tempering, and the hole expansion ratio satisfy Eqs. (A) and (B). It was found that the mold can be secured and excellent formability and hole expandability can be secured.
- T Pre-tempering temperature T (° C)
- T Tempering temperature rise (° C)
- the above-mentioned hole expansion ratio ⁇ is determined by pressing a 150 mm square test piece into a punching hole ⁇ ⁇ m, a clearance 12%, and a conical punch with a vertex angle 60 ° in the direction that the burr of the punching hole is outward. Molding at 0.5mm / sec.
- the amount of tempered martensite in the high-strength steel sheet obtained by the present invention is preferably in the range of 0.5 to 60% in terms of area ratio. Tempered martensite is evaluated using an optical microscope and martensite is observed by repeller etching, quantification is performed by repeller etching, the sample is polished (alumina finish), and a corrosive solution (pure water, pyrosulfite sodium) is used. After soaking for 10 seconds in a mixed solution of tritium, ethyl alcohol, and picric acid, perform polishing again, rinse with water, and dry the sample with cold air.
- the sample tissue is 10
- the area of lOO in XlOOm was measured with a Luzex apparatus at 00 times to determine the area percentage of tempered martensite.
- the tensile strength and elongation were evaluated by conducting a tensile test in the direction perpendicular to the rolling direction of the JIS No. 5 tensile test piece.
- air / water cooling, mist cooling, water spray cooling, and dip water cooling are preferable because some rapid cooling is required to below the martensite transformation point. If the cooling rate is equal to or better than mist cooling, water spray cooling, dip water cooling, it can be used.
- the heating method is preferably induction heating, but a gas burner, a radiant tube furnace, Even if tempering in an electric furnace is possible, it is acceptable if it is as compact as induction heating and can be tempered in a short time.
- gas cooling is preferable in consideration of unnecessary oxidation and discoloration of zinc plating.
- the continuous annealing facility, the hot dip galvanizing treatment facility, or the combined use facility that installs the quenching / tempering facility in this case may have a pre-meshing facility that improves plating adhesion.
- various post-treatment facilities may be installed on the outlet side of continuous annealing equipment, hot-dip zinc plating equipment, or their combined use equipment. .
- steel having the composition shown in Table 1 is manufactured in a vacuum melting furnace, cooled and solidified, reheated to 1200-1240 ° C, and finish-rolled at 880-920 ° C (plate thickness 2.3). mm), after cooling, the coiling heat treatment of hot rolling was reproduced by holding at 600 for 1 hour.
- the obtained hot-rolled sheet was scaled by grinding, subjected to 7 cold rolling (1.2 mm), and then annealed at 750 to 880 for X75 s using a continuous annealing simulator.
- the alloying treatment was performed at 510 ° C. After that, it was classified according to the conditions in Table 2, and the effect of the equipment according to the present invention was confirmed.
- [1] to [3] are conventional examples as comparative examples, [1] is the case of tempering without quenching, and [2] [3] The conventional continuous hot dip galvanizing equipment is passed through. When cooled to room temperature (quenched) and then tempered in a separate line, [4] to [7] indicate the case of being treated by the equipment according to the present invention.
- Table 2
- the improvement of the material by tempering with the equipment of the present invention not only improves the hole expandability but also can be controlled to any quenching Z tempering temperature condition, so that a wide range of materials including the improvement of elongation can be obtained. It can be seen that an improvement effect is obtained.
- a high-strength steel sheet or hot-dip galvanized high-strength steel sheet that is excellent in elongation and hole expansibility used for automobile parts and the like can be manufactured efficiently both in terms of cost and time. It can provide equipment and is extremely valuable industrially.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Crystallography & Structural Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Coating With Molten Metal (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/719,718 US9096918B2 (en) | 2004-11-19 | 2005-11-09 | Facility for production of high strength steel sheet or hot dip zinc coated high strength steel sheet excellent in elongation and hole expandability |
PL05806771T PL1829981T3 (pl) | 2004-11-19 | 2005-11-09 | Urządzenie do produkcji blachy stalowej o wysokiej wytrzymałości albo blachy stalowej o wysokiej wytrzymałości, powlekanej ogniowo cynkiem, o doskonałych właściwościach wydłużenia oraz rozszerzalności otworu |
ES05806771.1T ES2541307T3 (es) | 2004-11-19 | 2005-11-09 | Aparato para la producción de chapa de acero de alta resistencia o chapa de acero de alta resistencia revestida de zinc por inmersión en caliente, excelente en alargamiento y capacidad de expansión del orificio |
CA2587953A CA2587953C (en) | 2004-11-19 | 2005-11-09 | Facility for production of high strength steel sheet or hot dip zinc coated high strength steel sheet excellent in elongation and hole expandabiility |
EP05806771.1A EP1829981B1 (en) | 2004-11-19 | 2005-11-09 | Apparatus for producing high strength steel sheet or hot dip zinc plated high strength steel sheet excellent in elongation and bore expanding characteristics |
BRPI0518342-1B1A BRPI0518342B1 (pt) | 2004-11-19 | 2005-11-09 | Equipamento para produção de chapas de aço de alta resistência ou chapas de aço de alta resistência revestidas de zinco por imersão a quente com excelente alongamento e excelente capacidade de expansão de furos |
MX2007005568A MX2007005568A (es) | 2004-11-19 | 2005-11-09 | Aparato para producir lamina de acero de alta resistencia o lamina de acero de alta resistencia con formacion de placa de zinc en profundo con calor, excelente en elongacion y caracteristicas de expansion de la perforacion. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-335598 | 2004-11-19 | ||
JP2004335598A JP4171454B2 (ja) | 2004-11-19 | 2004-11-19 | 伸びおよび穴拡げ性に優れた高強度鋼板または溶融亜鉛めっき高強度鋼板の製造設備 |
Publications (1)
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WO2006054564A1 true WO2006054564A1 (ja) | 2006-05-26 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/JP2005/020977 WO2006054564A1 (ja) | 2004-11-19 | 2005-11-09 | 伸びおよび穴拡げ性に優れた高強度鋼板または溶融亜鉛めっき高強度鋼板の製造設備 |
Country Status (11)
Country | Link |
---|---|
US (1) | US9096918B2 (ja) |
EP (1) | EP1829981B1 (ja) |
JP (1) | JP4171454B2 (ja) |
KR (2) | KR20070068461A (ja) |
CN (1) | CN100564550C (ja) |
BR (1) | BRPI0518342B1 (ja) |
CA (1) | CA2587953C (ja) |
ES (1) | ES2541307T3 (ja) |
MX (1) | MX2007005568A (ja) |
PL (1) | PL1829981T3 (ja) |
WO (1) | WO2006054564A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102031474A (zh) * | 2010-12-07 | 2011-04-27 | 重庆万达薄板有限公司 | 高强度热浸镀锌钢带生产方法 |
Families Citing this family (10)
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---|---|---|---|---|
JP5197859B1 (ja) * | 2012-02-23 | 2013-05-15 | 株式会社ワイエイシイデンコー | 熱間プレス用の鋼板の熱処理方法 |
WO2015015239A1 (en) * | 2013-08-02 | 2015-02-05 | ArcelorMittal Investigación y Desarrollo, S.L. | Cold rolled, coated and post tempered steel sheet and method of manufacturing thereof |
DE102014108335B3 (de) * | 2014-06-13 | 2015-10-01 | Thyssenkrupp Ag | Verfahren zur Herstellung eines aluminierten Verpackungsstahls und Verwendung eines aluminierten Stahlblechs als Verpackungsstahl |
BR112018073175B1 (pt) | 2016-05-10 | 2022-08-16 | United States Steel Corporation | Produto de chapa de aço laminada a frio de alta resistência, e, método para produzir um produto de chapa de aço laminada a frio de alta resistência |
US11993823B2 (en) | 2016-05-10 | 2024-05-28 | United States Steel Corporation | High strength annealed steel products and annealing processes for making the same |
US11560606B2 (en) | 2016-05-10 | 2023-01-24 | United States Steel Corporation | Methods of producing continuously cast hot rolled high strength steel sheet products |
KR20220004213A (ko) | 2019-05-07 | 2022-01-11 | 유나이테드 스테이츠 스틸 코포레이션 | 연속 주조 열간 압연 고강도 강판 제품의 제조 방법 |
JP2022543605A (ja) | 2019-08-07 | 2022-10-13 | ユナイテッド ステイツ スチール コーポレイション | 高い展延性を有する亜鉛被覆鋼板製品 |
CN114630914A (zh) | 2019-08-19 | 2022-06-14 | 美国钢铁公司 | 高强度钢产品和用于制备所述高强度钢产品的退火方法 |
WO2022004820A1 (ja) * | 2020-06-30 | 2022-01-06 | Jfeスチール株式会社 | 亜鉛めっき鋼板、部材及びそれらの製造方法 |
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JP2002275546A (ja) * | 2001-03-13 | 2002-09-25 | Nippon Steel Corp | 連続焼鈍および溶融メッキ兼用設備 |
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2004
- 2004-11-19 JP JP2004335598A patent/JP4171454B2/ja active Active
-
2005
- 2005-11-09 KR KR20077011322A patent/KR20070068461A/ko not_active Application Discontinuation
- 2005-11-09 US US11/719,718 patent/US9096918B2/en active Active
- 2005-11-09 MX MX2007005568A patent/MX2007005568A/es active IP Right Grant
- 2005-11-09 CN CNB2005800395062A patent/CN100564550C/zh active Active
- 2005-11-09 PL PL05806771T patent/PL1829981T3/pl unknown
- 2005-11-09 CA CA2587953A patent/CA2587953C/en not_active Expired - Fee Related
- 2005-11-09 EP EP05806771.1A patent/EP1829981B1/en active Active
- 2005-11-09 ES ES05806771.1T patent/ES2541307T3/es active Active
- 2005-11-09 KR KR1020097017112A patent/KR20090102854A/ko not_active Application Discontinuation
- 2005-11-09 BR BRPI0518342-1B1A patent/BRPI0518342B1/pt not_active IP Right Cessation
- 2005-11-09 WO PCT/JP2005/020977 patent/WO2006054564A1/ja active Application Filing
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CN102031474A (zh) * | 2010-12-07 | 2011-04-27 | 重庆万达薄板有限公司 | 高强度热浸镀锌钢带生产方法 |
Also Published As
Publication number | Publication date |
---|---|
US9096918B2 (en) | 2015-08-04 |
EP1829981B1 (en) | 2015-06-03 |
BRPI0518342B1 (pt) | 2014-04-08 |
CN100564550C (zh) | 2009-12-02 |
KR20070068461A (ko) | 2007-06-29 |
EP1829981A1 (en) | 2007-09-05 |
KR20090102854A (ko) | 2009-09-30 |
PL1829981T3 (pl) | 2015-10-30 |
CA2587953C (en) | 2010-09-14 |
EP1829981A4 (en) | 2013-05-22 |
MX2007005568A (es) | 2007-07-05 |
BRPI0518342A2 (pt) | 2008-11-18 |
JP4171454B2 (ja) | 2008-10-22 |
JP2006144075A (ja) | 2006-06-08 |
CN101061241A (zh) | 2007-10-24 |
ES2541307T3 (es) | 2015-07-17 |
US20090205755A1 (en) | 2009-08-20 |
CA2587953A1 (en) | 2006-05-26 |
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