WO2000003816A1 - Equipement et procede destines au placage en continu d'une feuille d'acier - Google Patents

Equipement et procede destines au placage en continu d'une feuille d'acier Download PDF

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Publication number
WO2000003816A1
WO2000003816A1 PCT/JP1999/003879 JP9903879W WO0003816A1 WO 2000003816 A1 WO2000003816 A1 WO 2000003816A1 JP 9903879 W JP9903879 W JP 9903879W WO 0003816 A1 WO0003816 A1 WO 0003816A1
Authority
WO
WIPO (PCT)
Prior art keywords
steel sheet
plating
continuous
cold rolling
hot
Prior art date
Application number
PCT/JP1999/003879
Other languages
English (en)
Japanese (ja)
Inventor
Akio Adachi
Masayuki Hashimoto
Kouzou Hirai
Hirotaka Nakamura
Original Assignee
Kawasaki Jukogyo Kabushiki Kaisha
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kawasaki Jukogyo Kabushiki Kaisha filed Critical Kawasaki Jukogyo Kabushiki Kaisha
Publication of WO2000003816A1 publication Critical patent/WO2000003816A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/28—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by cold-rolling, e.g. Steckel cold mill
    • 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

Definitions

  • the present invention relates to a continuous plating apparatus and method for a steel sheet, and more particularly to an apparatus and method for continuously producing a plated steel sheet having a thickness of about 0.6 to 1.0 mm.
  • a steel sheet (hot-rolled steel sheet) with a thickness of 2.0 to 4.0 mm is obtained by hot rolling, passed through a pickling line, and then transferred to a cold rolling line independent of the pickling line. Then, it passes through a zinc plating line independent of the cold rolling line.
  • Fig. 2 shows the general configuration of the conventional zinc plating equipment. A welder 2, loopers 1, 3 and 5, an annealing furnace 6 are placed between the upstream reel 1 and the downstream reel 17. In addition, the hot-dip galvanizing pot, which is a plating means, is placed 7 powers high.
  • a galvanizing zone 9 On the downstream side of the pot 7, a galvanizing zone 9, a skin pass mill 12, a tension leveler (not shown), an iridation treatment facility (not shown), and the like may be provided as necessary.
  • the cold rolling line used prior to the plating process is provided as an independent line separate from the pickling line and the plating line.
  • a hot rolling steel sheet having a thickness of 2.0 to 4.0 mm is generally subjected to a plurality of passes using a reverse rolling mill or a tandem rolling mill to form a 0.2 to 1 pass.
  • Rolled to 2 mm is generally subjected to a plurality of passes using a reverse rolling mill or a tandem rolling mill to form a 0.2 to 1 pass.
  • the steel sheets obtained by hot rolling are further combined with three other lines, namely, an pickling line, a cold rolling line, and a plating line. I had to go through.
  • the number of independent equipment required is the same as the number of lines, which requires a large amount of equipment cost and requires a considerably large space in the steelworks for the equipment arrangement.
  • the leading and trailing ends of the steel sheet are easily damaged or defective in each line, and the costs associated with moving between lines are increased. Will be.
  • the present invention has been made in view of the above circumstances, and has as its object to provide a continuous steel sheet plating apparatus and method capable of forming a hot-rolled steel sheet by a single line only. .
  • the present invention provides an apparatus for continuously plating steel sheets.
  • the steel sheet to be plated is a hot-rolled steel sheet having a thickness of 1.2 mm or less.
  • the hot-rolled steel sheet has a thickness of 1.0 to 1.2 mm.
  • the steel sheet after the plating treatment is a plated steel sheet having a thickness of 0.6 to 1.0 mm.
  • the hot-rolled steel sheet is obtained by hot-rolling a thin-walled piece obtained by continuous forming.
  • the cold rolling mill is composed of one stand.
  • At least one of a galvanile zone, a skin pass mill, a tension leveler, and a chemical conversion zone is provided downstream of the pegging device. One is located.
  • the plating apparatus includes a pot having molten metal stored therein.
  • a desired steel sheet is manufactured by passing the steel sheet only through a single line including the pickling device, the cold rolling mill and the plating device. This eliminates the need to install many lines as in the past, reducing equipment costs, installation space, running costs, and shortening the time required to manufacture plated steel plates. Thus, the production cost of the plated steel sheet can be significantly reduced.
  • the present invention also provides a method for continuously plating a steel sheet, comprising: an acid pickling step of washing the steel sheet by using an acid; a cold rolling step of cold rolling the steel sheet; And a plating step of plating the steel sheet after the cold rolling step.
  • the pickling step, the cold rolling step, and the plating step continuously plating the steel sheet. It is characterized by constituting a single line to be processed.
  • the steel sheet to be plated is a hot-rolled steel sheet having a thickness of 1.2 mm or less.
  • the hot-rolled steel sheet has a thickness of 1.0 to 1.2 mm.
  • the steel sheet after the plating treatment is a plated steel sheet having a thickness of 0.6 to 1.0 mm.
  • the hot-rolled steel sheet is obtained by hot-rolling a thin-walled piece obtained by continuous forming.
  • the cold rolling step is performed using a cold rolling mill composed of one stand.
  • plating is performed using at least one of a galvanizing zone, a skin pass mill, a tension leveler, and an iridashi processing zone.
  • a predetermined treatment is performed on the treated steel sheet.
  • the steel sheet is immersed in molten metal stored in a pot.
  • FIG. 1A is a schematic diagram showing an upstream portion of a continuous steel sheet plating facility according to an embodiment of the present invention.
  • FIG. 1B is a schematic diagram showing a middle part of a continuous steel sheet plating facility according to an embodiment of the present invention.
  • FIG. 1C is a schematic diagram showing a downstream portion of the continuous steel sheet plating apparatus according to the embodiment of the present invention.
  • FIG. 2 is a schematic diagram showing a conventional steel plate plating facility.
  • FIGS. 1A, 1B, and 1C are schematic diagrams respectively showing an upstream portion, a middle stream portion, and a downstream portion of a continuous steel plate installation according to the present embodiment (hereinafter referred to as “the installation”).
  • the flow of a series of steel sheets is shown in the order II in Fig. 1A, Fig. 1B, and Fig. 1C.
  • This equipment is for applying zinc plating to steel sheets.
  • the upstream part of this equipment is, from the upstream side to the downstream side, unwinding reel 1, welder 2, inlet looper 3, pickling tank (pickling device) 4, cold pressure
  • the rolling mills 5 are arranged sequentially.
  • the reel 1 has a configuration in which two coils of the steel sheet S can be set at the same time. When the unwinding of the steel sheet S from one coil is completed, the reel 1 can be unwound continuously from the other coil. When switching the coils, the ends of the steel sheets S are welded to each other by the welder 2 and connected.
  • the looper 3 is composed of a plurality of rolls whose positions are variable, and three steel plates are hung over these rolls. By changing the position of the roll, the speed difference of the steel sheet S between the upstream side and the downstream side can be absorbed.For example, when welding the ends of the steel sheet S by the welder 2, Also, the steel sheet S can be sent downstream at a constant speed.
  • the pickling tank 4 arranged downstream of the looper 3 is a means for removing the scale (iron oxide film) from the surface of the steel sheet S before rolling, and the pickling tank 4 is not shown. It consists of a pickled part, a washed part, and a dried part.
  • a cold rolling mill 5 arranged downstream of the pickling tank 4 is a non-reversing six-fold rolling mill composed of a pair of work ports 5a, 5.b and their outer backup rolls. Only one stand is provided, and before and after it, bridle rolls 5c and 5d for applying a constant tension to the steel sheet S are arranged.
  • the middle part of this facility is composed of an annealing furnace 6, a zinc bath pot (plating equipment) 7, an air knife 8, a galvanir zone 9, and an air cooling section 1 from upstream to downstream. 0 and the water cooling section 11 are sequentially arranged.
  • the annealing furnace 6 includes a heating zone 6a, a reduction zone 6b, and a cooling zone 6c in order from the upstream side so that the steel sheet S immediately before plating can be heated and annealed without being oxidized. Is configured.
  • a zinc bath pot 7, which is a plating apparatus, is a container in which molten zinc for immersing the steel sheet S for plating is stored, and an air knife 8 for adjusting the plating thickness is provided on an upper portion thereof. Is provided.
  • the galvanile zone 9 is a heat treatment device that heats the steel sheet S in order to reduce the porosity of the plating layer.
  • the steel sheet S heated in the galvanile zone 9 is cooled in the subsequent air cooling section 10 and water cooling section 11.
  • the downstream part of this facility is, from the upstream side to the downstream side, a skin pass mill 12, a tension leveler 13, a chemical conversion zone 14, an exit looper 15, An oiling device 16 and a take-up reel 17 are sequentially arranged.
  • a shear cutting machine
  • the skin pass mill 12 is a means for applying a slight reduction of about 1 to 3% to the mounted steel sheet S to eliminate the yield elongation and to smooth the surface of the steel sheet S.
  • the tension leveler 13 increases the flatness by applying tension to the steel sheet S to correct the wavy of the steel sheet S due to edge elongation and medium elongation.
  • the chemical conversion treatment zone 14 is a means for subjecting the steel sheet S to chromate treatment or the like.
  • the steel sheet S passed through the zinc plating line by this facility is a hot-rolled steel sheet (hot coil) with a thickness of 1.0 to 1.2 mm.
  • the so-called thin steel sheet is used as the hot-rolled steel sheet.
  • the thin slab structure whose commercial production has begun in recent years, has a lower cost of the manufacturing equipment than a normal series, and a tunnel furnace etc. is arranged before the finishing mill. This keeps the rolling temperature high, thereby enabling commercial production of 1.0 mm thick sheets.
  • the thickness of the thin strip for obtaining the steel sheet S is not limited to about 50 mm, but in any case, the thickness can be easily reduced to 1.2 mm or less by hot rolling. Power preferred.
  • the hot-rolled steel sheet S with a thickness of 1.0 to 1.2 mm as described above is passed through a zinc-plated line by this equipment, and in the pickling tank 4, the surface of the steel sheet S is pickled, washed with water, and further dried. I do. Then, the steel sheet S from which the surface scale has been removed is cold-rolled by a cold rolling mill 5, annealed in an annealing furnace 6, and zinc-coated in a zinc bath port 7.
  • the galvanized steel sheet S is treated in the Garno-Kibel zone 9, the surface smoothness and flatness of the steel plate S are increased by a skin pass mill 12 and a tension leveler 13 After the necessary processing is performed in the iridashi processing zone 14 and the like, it is wound up on a reel 17.
  • the cold rolling mill 5 of this facility is composed of only one stand, and cannot be passed through the steel sheet S multiple times because it is not a reversing type but a non-reversing type, thus simplifying the installation structure.
  • the rolling reduction of steel sheet S is as low as about 40% or less.
  • the hot-rolled steel sheet S having a thickness of 1.0 to 1.2 mm is used as a material, 0.6 to 0.8 It is possible to obtain a cold-rolled plated steel sheet having a thickness of about mm or about the same. Since the reduction rate is not high, the drawing characteristics (r value) of the product are slightly inferior to those of the conventional product with a reduction of 70 to 80%. Has this equipment Prefabricated steel plates have sufficient uses as products.
  • the products that can be manufactured by the continuous plating line using this facility are not limited to products with hot-dip galvanized cold-rolled steel, but other various products can be manufactured by using the various methods described below. can do.
  • cold rolling is performed by passing a steel sheet S through the cold rolling mill 5 with the pair of work rolls 5a and 5b of the cold rolling mill 5 being open. It is possible to manufacture hot-rolled steel products that are not zinc-plated.
  • the third method is to obtain an annealed cold-rolled steel sheet that has not been plated unless any molten metal is placed in the pot 7. Can be. In this case, if the cold rolling is not performed in the same manner as in the first method, a hot-rolled steel sheet subjected to only pickling can be obtained.
  • the use and non-use of the Galvanile belt 8, the skin pass mill 12, the tension leveler 13 and the Iridani treatment zone 14 downstream of the pot 7 are appropriately determined.
  • a steel sheet having desired specifications can be manufactured at an appropriate cost.
  • a desired product can be obtained by adopting an optimal manufacturing method in consideration of economic rationality according to a required product specification.
  • the cold rolling mill 5 shown in FIG. 1A can be replaced with two stands (or more) instead of one stand. By increasing the number of stands of the cold rolling mill 5, the rolling reduction of the steel sheet S can be increased, and a thinner steel sheet can be manufactured.
  • the present invention can be widely applied as equipment and a method for continuously producing a plated steel sheet having a thickness of about 0.6 to 1.0 mm.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating With Molten Metal (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Metal Rolling (AREA)

Abstract

L'invention concerne un équipement destiné au placage en continu de feuilles d'acier qui comprend un dispositif de décapage (4) servant à nettoyer une feuille d'acier (S) avec un acide, un laminoir à froid (5) destiné au laminage à froid de la feuille d'acier (S) et un dispositif de placage (7) installé en aval du dispositif de décapage (4) et du laminoir à froid (5) dans une direction d'alimentation, qui est conçu pour plaquer la feuille d'acier (S), le dispositif de décapage (4), le laminoir à froid (5) et le dispositif de placage (7) formant une chaîne unique destinée à plaquer en continu la feuille d'acier (S). En faisant passer la feuille d'acier (S) uniquement par la chaîne unique constituée par le dispositif de décapage (4), le laminoir à froid (5) et le dispositif de placage (7), il est possible de produire une feuille d'acier désirée sans avoir à installer plusieurs chaînes comme c'est généralement le cas ainsi que de réduire les frais d'équipement, l'espace requis pour l'installation, les frais d'exploitation, le temps de fabrication de feuilles d'acier plaqué et, de manière significative, le coût de fabrication de feuilles d'acier plaqué.
PCT/JP1999/003879 1998-07-17 1999-07-19 Equipement et procede destines au placage en continu d'une feuille d'acier WO2000003816A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10/203186 1998-07-17
JP20318698A JP2965969B1 (ja) 1998-07-17 1998-07-17 鋼板の連続めっき方法

Publications (1)

Publication Number Publication Date
WO2000003816A1 true WO2000003816A1 (fr) 2000-01-27

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ID=16469893

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Application Number Title Priority Date Filing Date
PCT/JP1999/003879 WO2000003816A1 (fr) 1998-07-17 1999-07-19 Equipement et procede destines au placage en continu d'une feuille d'acier

Country Status (4)

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JP (1) JP2965969B1 (fr)
CN (1) CN1315886A (fr)
ID (1) ID29482A (fr)
WO (1) WO2000003816A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103599928A (zh) * 2013-12-02 2014-02-26 南京钢铁股份有限公司 一种炉卷轧机轧制专用管线钢的生产方法
EP2927343A1 (fr) * 2014-03-31 2015-10-07 Primetals Technologies Austria GmbH Installation et procédé de décapage et de revêtement métallique d'une bande métallique
WO2015149960A1 (fr) * 2014-03-31 2015-10-08 Primetals Technologies Austria GmbH Installation et procédé de décapage et de revêtement métallique d'une bande métallique
EP3097218B1 (fr) 2014-01-22 2019-09-25 SMS group GmbH Procédé et installation de revêtement au trempé à chaud de feuillard d'acier laminé à chaud
WO2020162848A1 (fr) * 2019-02-08 2020-08-13 İlhan Demi̇r Çeli̇k Ve Boru Profi̇l Endüstri̇si̇ Anoni̇m Şi̇rketi̇ Métal chaud en feuille laminé à froid (chr) et procédé de production d'un rouleau d'acier chaud laminé à froid (chrc)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5685985B2 (ja) * 2011-02-24 2015-03-18 東芝三菱電機産業システム株式会社 複合ライン及び複合ラインの制御方法
CN102974612B (zh) * 2012-12-12 2014-11-05 南京钢铁股份有限公司 一种单机架炉卷轧机轧制薄规格低温罐箱钢板的工艺
CN103934282B (zh) * 2014-04-18 2016-06-01 河北钢铁股份有限公司唐山分公司 一种深冲镀锌钢板的光整拉矫张力控制方法
CN106239037B (zh) * 2016-07-29 2019-02-15 黄冈三德板业有限公司 钢板的冷轧热镀一体化生产方法及钢板
CN106244967B (zh) * 2016-07-29 2018-12-07 黄冈三德板业有限公司 钢板冷轧涂镀一体化生产机组及其生产工艺

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06248407A (ja) * 1993-02-26 1994-09-06 Hitachi Ltd メッキ設備の運転方法
JPH07232241A (ja) * 1993-12-27 1995-09-05 Hitachi Ltd 連続鋳造装置及び連続鋳造システム
JPH10277603A (ja) * 1997-03-04 1998-10-20 Sms Schloeman Siemag Ag ストリップを製造する方法及び装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06248407A (ja) * 1993-02-26 1994-09-06 Hitachi Ltd メッキ設備の運転方法
JPH07232241A (ja) * 1993-12-27 1995-09-05 Hitachi Ltd 連続鋳造装置及び連続鋳造システム
JPH10277603A (ja) * 1997-03-04 1998-10-20 Sms Schloeman Siemag Ag ストリップを製造する方法及び装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103599928A (zh) * 2013-12-02 2014-02-26 南京钢铁股份有限公司 一种炉卷轧机轧制专用管线钢的生产方法
EP3097218B1 (fr) 2014-01-22 2019-09-25 SMS group GmbH Procédé et installation de revêtement au trempé à chaud de feuillard d'acier laminé à chaud
EP2927343A1 (fr) * 2014-03-31 2015-10-07 Primetals Technologies Austria GmbH Installation et procédé de décapage et de revêtement métallique d'une bande métallique
WO2015149960A1 (fr) * 2014-03-31 2015-10-08 Primetals Technologies Austria GmbH Installation et procédé de décapage et de revêtement métallique d'une bande métallique
WO2020162848A1 (fr) * 2019-02-08 2020-08-13 İlhan Demi̇r Çeli̇k Ve Boru Profi̇l Endüstri̇si̇ Anoni̇m Şi̇rketi̇ Métal chaud en feuille laminé à froid (chr) et procédé de production d'un rouleau d'acier chaud laminé à froid (chrc)

Also Published As

Publication number Publication date
JP2965969B1 (ja) 1999-10-18
ID29482A (id) 2001-08-30
CN1315886A (zh) 2001-10-03
JP2000034553A (ja) 2000-02-02

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