CN101812578A - Flexible strip processing line suitable for producing various high-strength steel - Google Patents
Flexible strip processing line suitable for producing various high-strength steel Download PDFInfo
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- CN101812578A CN101812578A CN200910046637A CN200910046637A CN101812578A CN 101812578 A CN101812578 A CN 101812578A CN 200910046637 A CN200910046637 A CN 200910046637A CN 200910046637 A CN200910046637 A CN 200910046637A CN 101812578 A CN101812578 A CN 101812578A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 135
- 239000010959 steel Substances 0.000 title claims abstract description 135
- 238000012545 processing Methods 0.000 title abstract description 21
- 238000001816 cooling Methods 0.000 claims abstract description 85
- 238000004519 manufacturing process Methods 0.000 claims abstract description 67
- 239000011248 coating agent Substances 0.000 claims abstract description 42
- 238000000576 coating method Methods 0.000 claims abstract description 42
- 238000005275 alloying Methods 0.000 claims abstract description 39
- 238000005554 pickling Methods 0.000 claims abstract description 28
- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- 238000000137 annealing Methods 0.000 claims abstract description 23
- 238000010583 slow cooling Methods 0.000 claims abstract description 23
- 238000002791 soaking Methods 0.000 claims abstract description 22
- 238000004140 cleaning Methods 0.000 claims abstract description 15
- 239000001257 hydrogen Substances 0.000 claims description 32
- 229910052739 hydrogen Inorganic materials 0.000 claims description 32
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 24
- 238000002161 passivation Methods 0.000 claims description 15
- 238000007747 plating Methods 0.000 claims description 9
- 230000006698 induction Effects 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 229910052725 zinc Inorganic materials 0.000 abstract description 41
- 229910052759 nickel Inorganic materials 0.000 abstract description 13
- 238000005246 galvanizing Methods 0.000 abstract description 12
- 238000009713 electroplating Methods 0.000 abstract description 10
- 238000010791 quenching Methods 0.000 abstract description 9
- 239000002253 acid Substances 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 230000000171 quenching effect Effects 0.000 abstract description 5
- 238000003303 reheating Methods 0.000 abstract description 5
- 201000009240 nasopharyngitis Diseases 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 41
- 239000011701 zinc Substances 0.000 description 40
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 38
- 238000005516 engineering process Methods 0.000 description 30
- 230000008569 process Effects 0.000 description 17
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 16
- 229910000734 martensite Inorganic materials 0.000 description 14
- 239000002994 raw material Substances 0.000 description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- 230000032683 aging Effects 0.000 description 11
- 238000005097 cold rolling Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 229910052742 iron Inorganic materials 0.000 description 9
- 150000002431 hydrogen Chemical class 0.000 description 8
- 230000009466 transformation Effects 0.000 description 8
- 238000005496 tempering Methods 0.000 description 7
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 229910000794 TRIP steel Inorganic materials 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 238000005098 hot rolling Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910000655 Killed steel Inorganic materials 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 238000005728 strengthening Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 238000007669 thermal treatment Methods 0.000 description 4
- 229910000885 Dual-phase steel Inorganic materials 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000010960 cold rolled steel Substances 0.000 description 3
- 210000003746 feather Anatomy 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 229910000990 Ni alloy Inorganic materials 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 2
- 239000000443 aerosol Substances 0.000 description 2
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- 208000020442 loss of weight Diseases 0.000 description 2
- QELJHCBNGDEXLD-UHFFFAOYSA-N nickel zinc Chemical compound [Ni].[Zn] QELJHCBNGDEXLD-UHFFFAOYSA-N 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
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- 239000006104 solid solution Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- 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
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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
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
-
- 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
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
- C21D9/48—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals deep-drawing sheets
-
- 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
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/003—Apparatus
- C23C2/0038—Apparatus characterised by the pre-treatment chambers located immediately upstream of the bath or occurring locally before the dipping process
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
- C23C2/0224—Two or more thermal pretreatments
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/024—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by cleaning or etching
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/26—After-treatment
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Coating With Molten Metal (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The invention discloses a flexible strip processing line suitable for producing various high-strength steel, which has the following configuration: decoiling, cleaning, heating, soaking and slow cooling stations are arranged sequentially to a gas jet cooling station and a water quenching cooling station; a reheating station is arranged on the rear of the gas jet cooling station; an overaging station or hot galvanizing station and coating normalizing and annealing station are arranged on the rear of the reheating station, and a movable bypass channel is connected with the reheating and overaging stations; then, final cooling and leveling stations are arranged, and oiling or passivating and other postreatment stations are connected to a coiling station so as to obtain finished products; an acid pickling and electroplating stations are arranged corresponding to the water quenching cooling station; and a connecting channel is arranged on the rear of the electroplating station, and is correspondingly connected with the reheating or directly connected with the passivating station and other posttreatment stations. The flexible strip processing line integrates production of common cold-rolled sheets, and hot dip galvanized and coating alloying annealed sheets and electroplating of Zn and Ni sheets, particularly superstrength cold-rolled sheets, galvanized sheets and hot dip galvanized and coating alloying annealed sheets to one machine set so as to realize flexible production.
Description
Technical field
The present invention relates to be with steel thermal treatment and process for treating surface, particularly a kind of band steel of the various high-strength steel of suitable production of flexibility is handled line.
Background technology
The protection environment is realized Sustainable development, has become the 21 century mankind's common recognition.Along with the Hyundai Motor industrial expansion, loss of weight is energy-conservation to have become trend of the times.The result of automobile lightweight research shows that for reaching the purpose of " loss of weight is energy-conservation, reduces discharging ", automotive industry must use high-strength steel with the used steel plate thickness of attenuate in a large number.Therefore, the demand to high strength cold-rolled plate and heat zinc coating plate has all increased greatly.
High strength cold-rolled plate adopts the continuous annealing unit production with quickly cooling device, for reaching 980MPa level and above intensity thereof, has good properties for follow simultaneously, the continuous annealing unit must be equipped quickly cooling devices such as shrend, aerosol cooling or the jet cooling of high hydrogen, and the main technique of its continuous annealing is:
Uncoiling-cleaning-heating-soaking-slow cooling-cold soon-(pickling)-(reheat)-overaging (tempering)-cooling-smooth-finishing-high strength cold-rolled plate
Continuous annealing process be for will be heated to certain temperature through the cold rolled strip that uncoiling is cleaned, insulation for some time, slow cooling to a certain temperature in fast cool equipment with very fast cooling rate cool to room temperature or overaging temperature.
The shrend cooling is the fastest method of cooling of present speed of cooling, it also is a kind of method of cheap production high-strength steel, add more a spot of alloying element and also can produce the two-phase of higher-strength grade, heterogeneous and martensite high-strength steel, this method is when water-cooled, belt steel surface can form layer oxide film, need additional pickling, and when adopting the shrend cooling, under the overaging temperature, stop difficulty of cooling raio, therefore be with steel to have to be cooled to below 100 ℃, so need reheat tempering temperature carries out tempering, to guarantee the ageing resistance stability of steel band.
When continuous annealing process adopts the jet method of cooling of high hydrogen, cooling terminal temperature controllability is strong, the band steel need not to be chilled to room temperature, can oxidation yet, therefore be with steel not need directly to enter overaging or behind reheat, enter overaging through pickling, but the speed of cooling of the jet method of cooling of high hydrogen is slower than shrend cooling rate, therefore under the precondition of adding identical alloying element, the cold-reduced sheet strength grade that adopts the jet cooling of high hydrogen to produce is more much lower than adopting the shrend refrigerative.
High-strength hot-dip zinc-coated plate adopts the Continuous Hot Dip Galvanizing production with quickly cooling device, for intensity and the assurance pot galvanize platability that improves substrate as far as possible, Continuous Hot Dip Galvanizing must possess and is equipped with the jet quickly cooling device of high hydrogen, shrend or aerosol cooling and pickler, and the main technique of its continuous hot galvanizing is:
Uncoiling-cleaning-heating-soaking-slow cooling-cooling-(pickling)-(reheat)-pot galvanize fast (or comprising coating alloying annealing)-cooling-smooth-finishing-high-strength hot-dip zinc-coated plate
The continuously dip coat zinc technology will be for will be heated to a certain soaking temperature through the cold rolled strip that uncoiling is cleaned, the insulation certain hour, slow cooling extremely is cooled near the zinc pot temperature or room temperature with very fast cooling rate in fast cool equipment after a certain temperature, band steel after the shrend also needs the oxide film through overpickling flush away belt steel surface, enter the pot galvanize of zinc pot or reach coating alloying annealing through reheat, after cooling enters postprocessing working procedures such as smooth.
Because the pot galvanize of band steel must be finished about 460 ℃, coating alloying anneal after the pot galvanize must be finished about 500 ℃, if the heat zinc coating plate of production high strength grade on traditional continuous hot galvanizing line, must in substrate, add a large amount of alloying elements, the pot galvanize and the coating alloying heat zinc coating plate thereof that can not obtain to have the excellent surface quality but this can cause the enrichment of zinc-plated front spring surface alloy element such as Mn, Si again.Therefore, the technology of employing shrend cooling+pickling+reheat+pot galvanize (or comprising coating alloying annealing) can improve the strength grade of steel plate on the one hand greatly, on the other hand, the alloying element of all right flush away belt steel surface enrichment of pickling can guarantee to obtain to have the high-strength hot-dip zinc-coated of excellent surface quality and coating alloying annealed sheet thereof.
When adopting the quick process for cooling of high hydrogen, the band steel can be without pickling, and directly enter zinc pot pot galvanize (or comprising the coating alloying anneal) or enter zinc pot pot galvanize (or comprising coating alloying annealing) through reheat, enter postprocessing working procedures such as smooth through cooling afterwards, but when adopting this technology, for guaranteeing that platability can not add too much alloying element, under identical chemical member condition, the strength grade of its finished product is on the low side, therefore compare with the shrend cooling, fast cold pot galvanize of producing in certain alloy ingredient scope of high hydrogen and coating alloying heat zinc coating plate intensity rank thereof are lower.
Therefore, produce the production technique of high strength cold-rolled plate and heat zinc coating plate, the inlet cleaning equipment of its raw sheet, the formation smooth and oiling and taking-up equipment etc. that is used for annealed heating and soaking equipment, cooling and relevant device (for example shrend cooling and pickling and reheating equipment etc.) thereof, outlet fast all are essentially identical, therefore the production of high strength cold-rolled plate and heat zinc coating plate can be integrated on the unit.The more important thing is, because the cold-reduced sheet of high intensity levels and the market demand of heat zinc coating plate are not very big, if build the production line of production high strength cold-rolled plate and the production line of high-strength hot-dip zinc-coated plate respectively, to improve cost of investment greatly on the one hand, the production of two units all will be in undersaturated condition on the other hand, simultaneously, this production high-strength steel especially unit of super-high strength steel is not suitable for producing the mild steel product of great surface quality again, and can only the relatively poor common low-grade mild steel product of production surface quality, thereby cause the serious wasting of resources.Therefore, reasonable Arrangement unit each section equipment and research and develop the switching device of the logical plate of steel plate how is integrated in the great attention that has more and more caused iron and steel circle on same the unit with the more and quantity of specification kind and few high strength and the production of strong cold-reduced sheet of superelevation and heat zinc coating plate.
Japanese patent application No. spy opens flat 2003-253413 a kind of high strength cold rolled steel plate and steel plate galvanized dual-purpose producing apparatus and dual-purpose manufacture method is provided, this method can be with the steel plate that comes out from the annealing furnace that is equipped with heating zone, soaking zone, jet cooling section, supply galvanizing rig to make steel plate galvanized, promptly walk zinc-plated channel path, in addition, also can be with the steel plate that comes out from aforementioned annealing furnace, do not feed to watch-quench tank by galvanizing rig, to make high strength cold rolled steel plate, promptly walk cold rolling bare board channel path.
This patent is the galvanized sheet that to possess two kinds of processing route shifters be feature and the dual-purpose manufacture method of high strength cold rolled steel plate.For realizing the dual-purpose manufacturing of galvanized sheet and high strength cold-rolled plate, the technology realization approach that this method is taked comprises three kinds: 1, at the shifter that directly is provided with behind the jet cooling section between zinc pot and the watch-quench tank; 2, by making the sinking roller lifting in zinc pot and the watch-quench tank realize switching; 3, realize switching by in zinc-plated/shrend common groove, annotating zinc liquid or water.
But the main drawback of this patent is:
At first, owing to do not adopt the jet cooling of high hydrogen and shrend and acid cleaning process with quick cooling power, the dual-purpose manufacture method of this patent not only can not the production high intensity levels pot galvanize and coating alloying heat zinc coating plate, even connect can not producing of excellent surface quality than other phase transformation strengthening pot galvanize of low intensity level and coating alloying heat zinc coating plate;
Secondly, owing to do not adopt acid cleaning process and reheat tempering process after the shrend, not only surface quality is bad for the high strength cold-rolled plate that the dual-purpose manufacture method of this patent is produced, and plasticity and ageing resistance stability are all very poor;
At last, the technology of the dual-purpose manufacture method of this patent realizes approach 2 and 3 operational difficulty in actual production, when between galvanized sheet and cold-reduced sheet, switching, the residual zinc of roll surface will have a strong impact on the surface quality of cold-reduced sheet and the normal operation of unit, and a lot of insoluble technical problems such as the shared explosion that will bring the zinc pot of zinc pot and watch-quench tank and expensive switching cost.
Summary of the invention
The object of the present invention is to provide a kind of strip steel of the various high-strength steel of suitable production of flexibility to handle line, this processing line can adopt cold rolling hardened to roll hard material and hot rolling acid-cleaning plate is produced high-intensity cold-reduced sheet, the pure zine plate of hot dip, coating alloying heat zinc coating plate and electro-galvanizing, nickel plate, but efficent use of resources, reduce investment outlay, the production of common cold-reduced sheet and heat zinc coating plate and coating alloying heat zinc coating plate thereof is integrated on the unit, and, can also produce and electroplate Zn, Ni plate by adopting connecting passage; Cold-reduced sheet and pot galvanize and coating alloying heat zinc coating plate thereof that can also production superstrength grade; And, by adopting the acid cleaning process before the pot galvanize or electroplating Fe, Ni technology, this production technique and equipment have been eliminated the particularly bad shortcoming of super-high strength steel pot galvanize platability of high-strength steel fully, thereby can guarantee high-strength hot-dip zinc-coated and coating alloying pot galvanize product favorable surface quality.
For achieving the above object, technical scheme of the present invention is:
Be fit to produce the flexibility band steel processing line of various high-strength steel, it is provided with as follows: be followed successively by uncoiling, cleaning, heating, soaking, slow cooling station, to jet cooling station, shrend cooling station; Connect the pickling station again, be connected to final cooling, smooth, finishing station by reheat station, overaging station then, connect oiling then, batch station;
Therebetween, also be provided with: electroplate station, be connected with uncoiling cleaning, pickling and reheat, passivation and other aftertreatment station respectively by establishing connecting passage; Pot galvanize and coating alloying anneal station thereof connect the reheat station by the stove nose, connect plating postcooling and final cooling station by connecting passage; Bypass passageways movably, connect reheat station and overaging station, when producing the cold-reduced sheet product, this is the bypass passageways input movably, when production pot galvanize and coating alloying annealing product thereof, this movably bypass passageways withdraw from, the interface that withdraws from the stove that the back originally linked to each other with bypass passageways seals; Passivation and other aftertreatment station by establishing connecting passage, connect respectively and electroplate station, smooth, finishing station.
The jet cooling of high hydrogen is adopted in described jet cooling.
Described passivation and other aftertreatment station connect finishing, oiling, or batch station.
Described bypass passageways is different with connecting passage, and bypass passageways is a seal channel, and atmosphere and the atmosphere in the annealing furnace in the passage are basic identical, contains the nitrogen hydrogen hybrid protection gas of 2%～7% hydrogen.And the general blow-by of connecting passage and need not shielding gas.
In addition, the induction heater that is equipped with behind the jet cooling section of high hydrogen, preferably, the frequency of this induction heater 1000Hz and more than, than the existing line of handling, the present invention handles line can control fast cold back belt steel temperature, reheat speed and temperature, and does not need pickling, can fully satisfy the equipment requirements of high-strength plate manufacturing process.
In present cold rolling continuous heat treatment unit, produce high-strength plate and great surface quality sheet material (as automobile exterior panel) usually simultaneously, and high-strength steel especially super-high strength steel and great surface quality sheet material are diverse to the requirement of surface quality.High-strength steel is therefore not high to surperficial specification of quality owing to generally being used for automobile structure, and automobile exterior panel is high to surperficial specification of quality.At an a small amount of high-strength steel of Large Scale and Continuous thermal treatment unit production particularly during super-high strength steel; because armor plate strength is higher, plate shape is relatively poor; make that easy dross of furnace roller or local scratch are worn and torn etc.; thereby next can not produce the great surface quality plate after making the intact high-strength steel of unit production; therefore have to shut down and change impaired furnace roller; and huge continuous heat treating furnace is shut down cooling and it is all very big to change the loss of time and the loss of furnace roller spare part of furnace roller, so particularly super-high strength steel and great surface quality plate have caused great difficulty in the organization of production of same unit to high-strength steel.
Aspect specification, be the general broad of great surface quality plate of representative with the automobile exterior panel, but thinner thickness, and high-strength steel particularly super-high strength steel is generally all thicker but narrow.In the time of when a continuous heat treatment unit design, will taking into account these two kinds of products simultaneously, the technical difficulty height, unit is complicated and huge, and investment is inevitable very big.
Also requiring difference aspect the cooling technology of stove, the unit of producing the great surface quality plate is not high to the rate of cooling requirement of stove, but it is very high that mild steel is prevented that at high temperature the stable logical plate technique of wooden dipper high speed bent and broken belt from requiring, and requires tension force low and stable to each stove section.The unit of producing high-strength steel then requires very high to the rate of cooling of fast cold section of stove, and the just easy sideslip of the high-strength steel of thick narrow specification itself, plate shape is relatively poor after the fast cold phase transformation of this band steel, sideslip is more serious, and therefore the tension force to each stove section of unit requires than having relatively high expectations greatly and to the centering capacity of unit roller system.
Aspect levelling machine, require also different, product to the great surface quality requirement, smooth purpose is except the control of material property, plate shape are improved, and the improvement of surface quality is very important with improving, so require to have bigger smooth working roll roller directly and bigger rolling load.And high-strength steel product material yield strength height, smooth working roll roller is directly crossed senior general and is increased substantially the levelling machine rolling load, increase the force energy consumption and the investment of levelling machine, so general smooth working roll that adopts than minor diameter, bigger smooth tension force and suitable skin pass rolling power are to improve the plate shape of high-strength steel.
Aspect the switching of specification kind, high-strength steel is super-high strength steel especially, owing to the description that the consumption of each description is less but total is more, makes that the switching when the continuous heat treatment unit is produced increases, growth transit time.This has had a strong impact on the steady running and the production efficiency of Large Scale and Continuous thermal treatment unit, therefore for TECHNIQUE TO LARGE INTEGRATED STEEL WORKS, when having many continuous heat treatment units simultaneously, high speed steady running, maintenance unit in order to ensure other continuous heat treatment unit are in state preferably always, make product surface quality good, press for a special continuous heat-treatment lines of producing high-strength steel.
Handle line at the band steel of the various high-strength steel of suitable production of flexibility of the present invention and have special advantages, compare, have conspicuous outstanding feature and advantage with existing thermal treatment unit:
1. range of product is abundant.
Modal continuous annealing unit can only be produced general cold product, and modal Continuous Hot Dip Galvanizing can only be produced hot pure zinc plating and coating alloying pot galvanize product.Even the zinc-plated dual-purpose unit of bringing down a fever of latest developments also can only be produced two kinds of products of general cold-peace pot galvanize.And this company bring down a fever zinc-plated dual-purpose unit be not with high-strength steel particularly super-high strength steel be target product, the therefore advantage of many kinds and not obvious.
Flexible high-intensity band steel of the present invention is handled line, be equipped with high hydrogen high speed jet refrigerating unit and granulating unit simultaneously, be particularly suitable for specification wide in variety and the few high-strength steel of amount and the production of super-high strength steel, can not only produce the cold rolling high strength steel and the super-high strength steel (intensity can reach 1470MPa) of various strength grades, and can production the maximum intensity grade reach the various pot galvanize high-strength steels of 980MPa, in addition also can produce electro-galvanizing, electronickelling and the electroplated zinc nickel alloy product thereof of various strength grades.In a word, this multi-functional processing line is handled line than other cold rolled strip, have characteristics multi-functional, many kinds, can obtain comprise multiple high-strength steel products such as hot dip, general cold and plating with minimum investment, to satisfy the needs of present automotive industry to various high-strength steel kinds.
2. production cost is low.
At first aspect raw material, not only available to roll hard material be that raw material can be a raw material with hot rolling acid-cleaning plate directly also.Because the present invention has adopted novel high hydrogen high speed jet refrigerating unit and novel granulating unit, the high-strength steel of production same intensity grade can be used lower alloy content, the saving alloying element reduces production costs, simultaneously to steel-making, hot rolling, the production requirement of pickling and cold rolling each operation reduces, produce stable smooth operation more, the corresponding reduction of cost, in addition because this handling flexibly line can be produced various high-strength steels specially, therefore it is more convenient with transition to produce continuing of various high-strength steel, other units then need not to roll up investment for producing a small amount of super-high strength steel, thereby liberated other units, made whole company integral production cost reduce greatly;
3. quality product height.
Handle various high-strength steel products because processing line of the present invention is specifically designed to, therefore can take more effective measures, to improve its quality product at the production technique demand of high-strength steel.For example at the lower problem of common continuous heat treatment unit speed of cooling, this unit adopts novel high hydrogen high speed jet cooling and novel shrend technology to increase substantially rate of cooling, make the alloy content of high-strength steel chemical ingredients of same intensity grade reduce significantly, not only reduced production cost but also significantly improved the welding property and the platability of high-strength steel product.And for example the technology of the present invention adopts after the shrend pickling even the novel process of hot dip again after electroplating, and makes the platability of high-strength steel obtain further essence and improves, thereby make hot-dip galvanized high-strength steel surface quality and solidity to corrosion be significantly improved.
Description of drawings
Fig. 1 is the operational path skeleton diagram of first embodiment of the invention;
Fig. 2 is the operational path skeleton diagram of second embodiment of the invention;
Fig. 3 is the operational path skeleton diagram of third embodiment of the invention;
Fig. 4 is the operational path skeleton diagram of fourth embodiment of the invention;
Fig. 5 is the operational path skeleton diagram of fifth embodiment of the invention;
Fig. 6 is the operational path skeleton diagram of sixth embodiment of the invention;
Fig. 7 is the operational path skeleton diagram of seventh embodiment of the invention;
Fig. 8 is the operational path skeleton diagram of eighth embodiment of the invention;
Fig. 9 is the operational path skeleton diagram of ninth embodiment of the invention.
Embodiment
Below by embodiment in conjunction with the accompanying drawings, the band steel that specifies the various high-strength steel of suitable production of flexibility of the present invention is handled line (among the figure, solid arrow is the processing route of this embodiment employing, and dotted line is the selectable processing route of other embodiment).
Referring to Fig. 1, the present embodiment operational path is that the jet cooling 6 of 2-heating 3-soaking 4-slow cooling 5-is cleaned in raw material 1-uncoiling, and (the jet cooling of high hydrogen)-overaging 10-finally cools off the smooth 12-finishing of 11-13-oiling and aftertreatment 14-batches 15-finished product 16.
Technology of the present invention can be produced the high-strength steel cold-reduced sheet of general cold-reduced sheet and phase transformation strengthening, is particularly suitable for producing the following DP steel of cold rolling TRIP steel and 80 feather weight, and the processing parameter of producing cold rolling 80 feather weight TRIP steel and 80 feather weight DP steel is shown in table 1.As table 1 as seen, for the TRIP steel, importantly control soaking temperature, aging temp and the time thereof of its continuous annealing, require not high quick speed of cooling; And for high strength DP steel, the critical process controlled variable of its continuous annealing is soaking temperature and fast speed of cooling, and is especially very high to quick speed of cooling requirement, as for timeliness, then requires the low and time weak point of its temperature, to avoid martensitic decomposition.
This technology need not pickling and reheat operation, and the heat treatment step production cost is lower, and product surface quality is good.
The processing parameter of the cold rolling 80 kilograms of TRIP steel of table 1 and 80 kilograms of DP steel
| Rate of heating V0 ℃/s | Soaking temperature T1 ℃ | Soaking time t1 s | V1 ℃/s of slow cooling speed | T2 ℃ of slow cooling finishing temperature | Fast speed of cooling V2 ℃/s | Aging temp T3 ℃ | Aging time t2 s | |
| ??80K-TRIP | ??3～15 | ??700～820 | ??30～150 | ??3～30 | ??500～700 | ??20～60 | ??300～500 | ??120～500 |
| ??80K-DP | ??3～15 | ??750～850 | ??30～150 | ??3～30 | ??500～700 | ??50～150 | ??200～300 | ??80～300 |
Referring to Fig. 2, the present embodiment operational path is that the 2-heating is cleaned in raw material 1-uncoiling, and the 3-soaking jet cooling 6 of 4-slow cooling 5-(the jet cooling of high hydrogen)-reheat 9-overaging 10-finally cools off the smooth 12-finishing of 11-13-oiling and aftertreatment 14-batches 15-finished product 16.
Than embodiment 1, technology of the present invention can realize pyritous overaging technology behind the first low temperature, this technology can be with the good mild steel product of carbon aluminium-killed steel production ageing resistance performance, and the processing parameter of the low-carbon (LC) al-killed mild steel product that production ageing resistance performance is good is shown in table 2.As table 2 as seen, for the good carbon aluminium-killed steel of production ageing resistance performance, importantly control the soaking temperature and the aging technique of its continuous annealing, wherein, fully separate out in order to make in the steel solid solution carbon, pyritous overaging technology behind the first low temperature of necessary realization, processing line of the present invention has well satisfied its processing requirement by the reheat after fast cold.This technology also is fit to produce the martensitic steel and the dual phase steel of phase transformation strengthening.
Than other patents, the present invention handles on the line and has been equipped with powerful induction heater behind the jet cooling section of high hydrogen, can control fast cold post-heating speed, temperature, and not need pickling, can fully satisfy the equipment requirements of high-strength plate manufacturing process.
The processing parameter of table 2 carbon aluminium-killed steel and martensitic steel
| Rate of heating V0 ℃/s | Soaking temperature T1 ℃ | Soaking time t1 s | V1 ℃/s of slow cooling speed | T2 ℃ of slow cooling finishing temperature | Fast speed of cooling V2 ℃/s | Fast cold finishing temperature T3 ℃ | V3 ℃/s of |
4 ℃ of reheat temperature T | Aging temp T5 ℃ | Aging time t2 s | Reheat time t3 s | |
| Aluminium killed steel | ??3～15 | ??700～800 | ??30～150 | ??3～30 | ??500～700 | ??30～100 | ??100～300 | ??10～80 | ??300～500 | ??200??～350 | ??100??～500 | ??10??～60 |
| Martensitic steel | ??3～15 | ??750～900 | ??30～150 | ??3～30 | ??600～700 | ??50～150 | ??100～200 | ??10～80 | ??200～300 | ??200??～300 | ??100??～500 | ??10??～60 |
Main is, the embodiment of the invention can be cooled to the band steel earlier below the martensitic phase height, carry out tempering behind the generation martensitic transformation again and realize that quenching adds tempering, obtain tempered martensite to regulate the over-all properties of steel plate, produce than the dual phase steel product strength of embodiment 1 and plasticity arrange in pairs or groups better high strength dual phase steel steel plate, also can lower grade of production intensity but plasticity martensitic steel preferably.The processing parameter of producing the martensitic steel product also is shown in table 2.As seen from Table 2, in order to produce high-intensity martensitic steel, key is the soaking temperature and the fast speed of cooling of its continuous annealing of control, and wherein, in order to obtain enough martensite with proof strength, fast speed of cooling, fast cold terminal temperature are principal elements.
Compare with common fast cold back reheat, owing to be equipped with powerful induction heater behind the jet cooling section of high hydrogen on the processing line of the present invention, can control fast cold post-heating speed and temperature, and not need pickling, can fully satisfy the equipment requirements of high tensile steel plate manufacturing process.Can realize that this technology also is one of characteristics of the present invention.
Referring to Fig. 3, the present embodiment operational path is that raw material 1-uncoiling is cleaned 2-plating 17 (electroplating Fe or Ni)-reheat 9-pot galvanize 18-alloying 19-and finally cooled off smooth 12-passivation of 11-(or comprising oiling) and aftertreatment 20-finishing 13-oiling and aftertreatment 14-and batch 15-finished product 16.
Present embodiment process using high strength or super high strength hot rolled acid-cleaning plate (as hot-rolled high-strength steel) are raw material, by at electroplating surface-layer elements such as Ni, Fe as thin as a wafer, improve high-strength steel pot galvanize platability, be heated to then between 450～550 ℃, go into zinc pot pot galvanize (or and coating alloying), cooling afterwards enters the smooth back operation that waits.Because the zinc-plated time of reheat is lacked (in one minute), can reduce even avoid strengthening phase to decompose significantly, thereby the superelevation heat-flash that can obtain the excellent surface quality roll the pickling heat zinc coating plate, greatly reduces production cost.The processing parameter that production superelevation heat-flash rolls the advanced high-strength steel product of pickling pot galvanize is shown in table 3.Processing line of the present invention can be produced super high strength hot rolled heat zinc coating plate, has saved the cold continuous rolling operation, and this also is one of characteristics of the present invention.
The processing parameter of the advanced high-strength steel of table 3 hot rolling pot galvanize
| Reheat speed V0, ℃/s | |
Reheat time t1, s | Plating postcooling speed V1, ℃/s | |
| The advanced high-strength steel of hot rolling acid-cleaning | ??10～80 | ??450～550 | ??10～60 | ??3～50 |
Referring to Fig. 4, the present embodiment operational path is, raw material 1-uncoiling is cleaned 2-heating 3-soaking 4-slow cooling 5 (comprise high hydrogen section when slow cooling with)-shrend and cooled off that 7-pickling 8-reheat 9-overaging 10-finally cools off the smooth 12-finishing of 11-13-oiling and aftertreatment 14-batches 15-finished product 16.
The shrend of present embodiment process using adds tempering process, can produce the super-high strength steel cold-reduced sheet of excellent surface quality.Owing to adopt than the jet speed of cooling of high hydrogen water quenching technology faster, thereby can under identical Chemical Composition condition, improve the intensity rank of cold-reduced sheet greatly, other high-strength steel alloy content of perhaps production same intensity level can significantly reduce, the product welding property obviously improves, in addition, after shrend, adopt acid cleaning process, iron scale that can the flush away belt steel surface, thus can guarantee the steel plate favorable surface quality.
Referring to Fig. 5, the present embodiment operational path is that raw material 1-uncoiling is cleaned 2-heating 3-soaking 4-high hydrogen-cooled but 6 (the jet cooling of high the hydrogen)-pot galvanizes 18 of slow cooling 5-or comprised that alloying 19-finally cools off the smooth 12-passivation of 11-and other aftertreatment 20-finishing 13-oiling 14-batches 15-finished product 16; Therebetween, connect passivation 20 after smooth 12, and then connect finishing 13 stations.
Present embodiment technology can be produced the high-strength hot-dip zinc-coated and alloyed hot-dip galvanized steel sheet of higher-strength grade, is particularly suitable for the lower DP steel of production pot galvanize TRIP steel and strength grade, because production technique is simply so the unit operation cost is lower.
Referring to Fig. 6, the present embodiment operational path is that raw material 1-uncoiling is cleaned 2-heating 3-soaking 4-high hydrogen-cooled but 6 (the jet cooling of high the hydrogen)-reheat 9-pot galvanizes 18 of slow cooling 5-or comprised that alloying 19-finally cools off the smooth 12-passivation of 11-and other aftertreatment 20-finishing 13-oiling 14-batches 15-finished product 16; Aftertreatment comprises pre-phosphatization, passivation.
Present embodiment technology can be produced the higher-strength grade and hot-dip galvanized high-strength steel plate that have the excellent surface quality.The jet cooling of the high hydrogen of process using of the present invention will be with steel to be cooled fast to and be finished martensitic transformation below the transformation temperature, finish pot galvanize about reheat to 460 ℃, thereby reduced demand to raw steel hardening capacity, part has been eliminated the shortcoming of current technology, promptly in steel, add more alloying element (for the hardening capacity that improves steel plate so that after pot galvanize, finish martensitic transformation) alloying element such as Mn, the Si that cause influence the pot galvanize platability in the surface of steel plate enrichment.When improving armor plate strength, technology of the present invention can reduce the substrate alloying element content to a certain extent, because steel interalloy element is less, can guarantee platability and welding property simultaneously, finally obtain the hot-dip galvanized high-strength steel plate of excellent surface quality and user's use properties.
Referring to Fig. 7, the present embodiment operational path is, raw material 1-uncoiling is cleaned 2-heating 3-soaking 4-slow cooling (high hydrogen cooling section also when slow cooling section with) 5-shrend and cooled off 7-pickling 8-reheat 9-pot galvanize 18-alloying 19-and finally cool off the smooth 12-finishing of 11-13-oiling 14-and batch 15-finished product 16; Aftertreatment comprises pre-phosphatization, passivation.
Present embodiment technology can be produced the hot-dip galvanized high-strength steel plate of the excellent surface quality higher than embodiment 6 intensity.Process using speed of cooling of the present invention shrend faster replaces the jet cooling of high hydrogen, can under same substrate chemical ingredients condition, improve armor plate strength greatly, owing to adopted acid cleaning process, the iron scale that can the flush away belt steel surface produces because of shrend, but pickling simultaneously is the alloying elements such as Mn, Si of flush away surface enrichment also, can guarantee follow-up pot galvanize platability, obtain the hot-dip galvanized high-strength steel plate of excellent surface quality.
Referring to Fig. 8, the present embodiment operational path is, raw material 1-uncoiling is cleaned 2-heating 3-soaking 4-slow cooling (high hydrogen cooling section also when slow cooling section with) 5-shrend cooling 7-pickling 8-and electroplated 17 (plating Fe or Ni)-reheat 9-pot galvanize 18-alloying 19-finally cools off the smooth 12-passivation of 11-and other aftertreatment 20-finishing 13-oiling 14-batches 15-finished product 16; Aftertreatment comprises pre-phosphatization, passivation.
Present embodiment technology and embodiment 7 technologies are similar, just after pickling, add and electroplate Fe or Ni technology, electroplate one deck Fe or Ni at surface of steel plate, this has changed the surface of steel plate situation before the pot galvanize, thereby has solved the bad problem of some super-high strength steel pot galvanize platability fully.Present embodiment technology can the better great surface quality of production solidity to corrosion two coating superstrength heat zinc coating plates, also be one of characteristics of the present invention.
Referring to Fig. 9, the present embodiment operational path is, raw material 1-uncoiling is cleaned 2-heating 3-soaking 4-slow cooling (high hydrogen cooling section also when slow cooling section with) 5-shrend cooling 7-pickling 8-plating 17 (electroplated Ni, Zn)-passivation and aftertreatment 20-finishing 13-oiling and aftertreatment 14-and batched 15-finished product 16.
Continuous annealing operation and electroplating work procedure that present embodiment technology will be produced cold rolling electroplating zinc, nickel steel plate on the one hand unite two into one, can on a unit, finish continuous annealing and plating, thereby produce electro-galvanizing, electronickelling or electroplated zinc nickel alloy steel plate expediently, this has not only reduced cost of investment, has improved production efficiency, and can reduce excision amount end to end, raising lumber recovery; On the other hand,, can adopt the steel grade of lower alloying element to produce high-intensity cold rolling electroplating zinc, nickel steel plate, also can produce the fabulous electro-galvanizing of punching performance, nickel mild steel product owing to adopt slow cooling to add water quenching technology.
In the present embodiment 7,8,9 since shrend before slow cooling be the high hydrogen cooling section equipment that has adopted cooling power stronger, this has created precondition preferably for the shrend cooling, can suitably reduce the water temp of going into of shrend, thereby create condition for the improvement of final finished strip shape quality.
Claims (6)
1. the band steel of the various high-strength steel of suitable production of a flexibility is handled line, and it is provided with as follows:
Be followed successively by uncoiling, cleaning, heating, soaking, slow cooling station, to jet cooling station, shrend cooling station; Connect the pickling station again, be connected to final cooling, smooth, finishing station by reheat station, overaging station then, connect oiling then, batch station;
Therebetween, also be provided with:
Electroplate station, be connected with uncoiling cleaning, pickling, reheat and passivation and other aftertreatment station respectively by establishing connecting passage;
Pot galvanize and coating alloying anneal station thereof connect the reheat station by the stove nose, connect plating postcooling and final cooling station by connecting passage;
Movably bypass passageways connects reheat station and overaging station, produces cold-reduced sheet and connects when moving back product, this is the bypass passageways input movably, when production pot galvanize and coating alloying annealing product thereof, this movably bypass passageways withdraw from, the interface that withdraws from seals;
Passivation and other aftertreatment station by establishing connecting passage, connect respectively and electroplate station, smooth, finishing station.
2. the band steel of the various high-strength steel of suitable production of flexibility as claimed in claim 1 is handled line, it is characterized in that the jet cooling of high hydrogen is adopted in described jet cooling.
3. the band steel of the various high-strength steel of suitable production of flexibility as claimed in claim 1 is handled line, it is characterized in that described passivation and other aftertreatment station connect oiling, or batch station.
4. the band steel of the various high-strength steel of suitable production of flexibility as claimed in claim 1 is handled line, it is characterized in that, is equipped with induction heater after shrend cooling and the pickling section.
5. the band steel of the various high-strength steel of suitable production of flexibility as claimed in claim 4 is handled line, it is characterized in that, the frequency of described induction heater 1000Hz and more than.
6. the band steel of the various high-strength steel of suitable production of flexibility as claimed in claim 1 is handled line, it is characterized in that, described bypass passageways be-seal channel, and the interior atmosphere of atmosphere and annealing furnace is identical in the passage, contains the nitrogen hydrogen hybrid protection gas of 2%～7% hydrogen.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100466373A CN101812578B (en) | 2009-02-25 | 2009-02-25 | Flexible strip processing line suitable for producing various high-strength steel |
| JP2011550412A JP5670919B2 (en) | 2009-02-25 | 2010-02-24 | Flexible strip processing line suitable for production of various high-strength steels |
| KR1020117021691A KR101395044B1 (en) | 2009-02-25 | 2010-02-24 | Flexible Strip Steel Processing Line Suitable For Producing Various High-Strength Steel |
| BRPI1008468-1A BRPI1008468B1 (en) | 2009-02-25 | 2010-02-24 | FLEXIBLE TAPE STEEL PROCESSING LINE SUITABLE FOR PRODUCING VARIOUS HIGH STRENGTH STEEL |
| PCT/CN2010/070730 WO2010097038A1 (en) | 2009-02-25 | 2010-02-24 | Flexible strip steel processing line suitable for producing various high-strength steel |
| RU2011139832/02A RU2506321C2 (en) | 2009-02-25 | 2010-02-24 | General-purpose line for treatment of steel strip for production of high-strength steel of various types |
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|---|---|---|---|
| CN2009100466373A CN101812578B (en) | 2009-02-25 | 2009-02-25 | Flexible strip processing line suitable for producing various high-strength steel |
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| CN101812578A true CN101812578A (en) | 2010-08-25 |
| CN101812578B CN101812578B (en) | 2012-05-23 |
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| JP (1) | JP5670919B2 (en) |
| KR (1) | KR101395044B1 (en) |
| CN (1) | CN101812578B (en) |
| BR (1) | BRPI1008468B1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN101812578B (en) | 2012-05-23 |
| WO2010097038A1 (en) | 2010-09-02 |
| RU2506321C2 (en) | 2014-02-10 |
| JP2012518719A (en) | 2012-08-16 |
| BRPI1008468A2 (en) | 2019-02-12 |
| KR101395044B1 (en) | 2014-05-16 |
| KR20110117251A (en) | 2011-10-26 |
| RU2011139832A (en) | 2013-04-10 |
| JP5670919B2 (en) | 2015-02-18 |
| BRPI1008468B1 (en) | 2021-11-09 |
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