WO2000003816A1 - Equipment and method for continuous plating of steel sheet - Google Patents

Equipment and method for continuous plating of steel sheet 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
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WO
WIPO (PCT)
Prior art keywords
steel sheet
plating
continuous
cold rolling
hot
Prior art date
Application number
PCT/JP1999/003879
Other languages
French (fr)
Japanese (ja)
Inventor
Akio Adachi
Masayuki Hashimoto
Kouzou Hirai
Hirotaka Nakamura
Original Assignee
Kawasaki Jukogyo Kabushiki Kaisha
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Publication of WO2000003816A1 publication Critical patent/WO2000003816A1/en

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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)
  • Metal Rolling (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

Equipment for continuously plating steel sheets, comprising a pickling device (4) for cleaning a steel sheet (S) with acid, a cold rolling mill (5) for cold-rolling the steel sheet (S) and a plating device (7) disposed downstream of the pickling device (4) and the cold rolling mill (5) in a feeding direction of the steel sheet (S) and adapted to plate the steel sheet (S), the pickling device (4), the cold rolling mill (5) and the plating device (7) forming a single line for continuously plating the steel sheet (S). It is possible, by passing the steel sheet (S) through only the single line provided with the pickling device (4), the cold rolling mill (5) and the plating device (7), to produce a desired steel sheet without installing many lines as required conventionally, and to reduce equipment costs, an installation space, running costs, a plated steel sheet production time and significantly plated steel sheet production costs.

Description

明 細 書 鋼板の連続めつき設備および方法 技術分野  Description Steel plate continuous plating equipment and method
本発明は、 鋼板の連続めつき設備および方法に係わり、 特に、 0. 6〜1. 0 mm程度の厚さを有するめっき鋼板を連続的に製造するための設備および方法に 関する。  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.
背景技術  Background art
厚さが l mm以下の亜鉛めつき鋼板は、 従来、 つぎのようにして製造されてい る。 すなわち、 まず熱間圧延によって厚さ 2. 0 ~ 4. 0 mmの鋼板 （熱延鋼板） を得て、 それを酸洗ラインに通した後に、 酸洗ラインから独立した冷間圧延ライ ンに送り、 そのうえで、 冷間圧延ラインから独立した亜鉛めつきラインに通す。 図 2は、 従来の亜鉛めつき設備の一般的な構成を示しており、 上流側のリール 1と下流側のリール 1 7との間に、 ウェルダー 2やルーパ一 3、 1 5、 焼鈍炉 6 等とともに、 めっき手段である溶融亜鉛ポッ ト 7力く配置されている。 ポッ ト 7の 下流側には、 必要に応じてガルバニール帯 9やスキンパスミル 1 2、 テンション レべラー （図示せず） 、 ィ匕成処理設備 （図示せず） 等が設けられることもある。 めっき処理に先んじて使用される冷間圧延ラインは、 従来、 酸洗ラインやめつ きラインとは別に、 独立した一つのラインとして設けられている。 つまり、 冷間 圧延ラインでは、 リバース圧延機やタンデム圧延機を用いて、 一般的には厚さ 2. 0〜4. 0 mmの熱延鋼板に複数回のパスを施して 0. 2〜1 . 2 mmにま で圧延している。  Conventionally, zinc-plated steel sheets with a thickness of 1 mm or less have been manufactured as follows. That is, first, 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. 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. Conventionally, 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. In other words, in the cold rolling 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.
厚さ 2. 0〜4. 0 mmの熱延鋼板を得るには、 2 0 0〜2 5 0 mm前後の厚 さを有する連続铸造片 （スラブ） を熱間圧延するのが一般的である。 し力、し、 近 年では、 いわゆる薄スラブ連鎵についての技術開発が進んだため、 厚さ 5 0 mm 前後の薄肉の連続錶造片 （薄肉錶片） を製造し、 その铸片を直接同一ライン上で 熱間圧延し、 コイルに巻き取って熱延鋼板とすることができるようになった。 た だし従来は、 この薄スラブ連鍀によるにしても、 めっき鋼板を製造する場合には、 厚さ 2 . 0〜4. 0 mmの熱延鋼板としたのち、 それを互いに独立した酸洗ライ ン、 冷間圧延ライン、 およびめつきラインの各ラインに通すことによりめっき鋼 板を製造していた。 In order to obtain a hot-rolled steel sheet with a thickness of 2.0 to 4.0 mm, it is common to hot roll a continuous slab having a thickness of about 200 to 250 mm. . In recent years, the technological development of the so-called thin slab chain has progressed, and as a result, a thin continuous piece (thin piece) with a thickness of about 50 mm has been manufactured and the piece has been directly manufactured. Hot rolling on the same line and winding into coils have made it possible to produce hot-rolled steel sheets. Conventionally, however, even with this thin slab series, when manufacturing plated steel sheets, A hot-rolled steel sheet with a thickness of 2.0 to 4.0 mm is formed, and the hot-rolled steel sheet is passed through independent pickling lines, cold rolling lines, and plating lines to produce plated steel sheets. I was
なお、 上述した連続錶造片から亜鉛めつき鋼板を得るまでの工程については、 例えば、 「改訂 ·薄板マニュアル」 （社団法人日本鉄鋼協会 ·鋼板部会編） 、 第 5頁の図 2. 1に言己載されている。 また、 亜鉛めつきラインについての詳細は、 例えば、 「 （西山記念技術講座 ·第 1 0 6回/第 1 0 7回） 溶融亜鉛めつき鋼板 製造技術の進歩」 （社団法人鉄鋼協会） 、 第 4頁の図 3に記載されている。 さら に、 薄スラブ連錚に関しては、 rProduction of 1mm thick hot rol led steel stripj (雑誌 「MPT International 1/1998」 、 第 5 0〜5 1頁） に紹介されて いる。  The process for obtaining a zinc-plated steel sheet from a continuous steel slab as described above is described in, for example, “Revised · Sheet Sheet Manual” (edited by The Iron and Steel Institute of Japan, Steel Sheet Subcommittee), Figure 2.1 on page 5. It has been stated. For details on the zinc plating line, see, for example, “(Nishiyama Memorial Technical Lecture · No. 106 / No. 107) Advances in Manufacturing Technology for Hot-dip Galvanized Steel Sheet” (The Iron and Steel Institute of Japan) See Figure 3 on page 4. Further, the thin slab series is described in rProduction of 1mm thick hot rolled led steel stripj (Magazine "MPT International 1/1998", pp. 50-51).
上述したように従来は、 亜鉛めつき鋼板を製造する際には、 熱間圧延によって 得た鋼板を、 さらに、 互いに した酸洗ライン、 冷間圧延ライン、 およびめつ きラインの 3つものラインに通す必要があつた。  As described above, conventionally, when manufacturing zinc-coated steel sheets, 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.
このように従来の亜鉛めつき鋼板の製造方法ではそのライン数が多いために、 以下に述べるような種々の不都合が生じていた。  As described above, in the conventional method for manufacturing a zinc-plated steel sheet, since the number of lines is large, various inconveniences described below have occurred.
まず、 独立した設備がラインの数だけ必要なので、 多額の設備コストを要する と共に、 設備配置のために製鉄所内に相当に広いスペース力必要となる。 また、 鋼板の先端と尾端とに、 各ラインにおいて傷がついたり、 不良部分ができたりし やすいうえ、 ライン間の移動に伴うコストも発生するので、 ライン数が多いほど ランニングコストも上昇することになる。 さらに、 ラインごとに段取り上の都合 があるため、 一つのラインでの処理が終わった鋼板を直ちに次のラインに送るこ とは困難であり、 このため、 全ラインを経由して製品が完成するまでに長時間を 要するという欠点もある。  First, 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. In addition, 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. Furthermore, it is difficult to immediately send a steel sheet that has been processed in one line to the next line because of the convenience of setup for each line, and as a result, products are completed through all lines It also has the disadvantage that it takes a long time to complete.
本発明は、 上述した事情に鑑みてなされたもので、 熱延鋼板を単一のラインの みによってめつき鋼板とすることができる鋼板の連続めつき設備および方法を提 供することを目的とする。  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. .
発明の開示  Disclosure of the invention
上記目的を達成するために本発明は、 鋼板を連続的にめっき処理するための設 備において、 酸を用いて前記鋼板を洗浄する酸洗装置と、 前記鋼板を冷間圧延す. る冷間圧延機と、 前記酸洗装置および前記冷間圧延機の設置位置よりも、 前記鋼 板の流れ方向の下流側に配置され、 前記鋼板をめつき処理するためのめっき装置 と、 を備え、 前記酸洗装置、 前記冷間圧延機、 および前記めつき装置は、 前記鋼 板を連続的にめっき処理するための単一のラインを構成していることを特徴とす 。 In order to achieve the above object, the present invention provides an apparatus for continuously plating steel sheets. An acid pickling apparatus for washing the steel sheet using an acid, and a cold rolling mill for cold rolling the steel sheet. A plating apparatus disposed downstream of the sheet flow direction for plating the steel sheet, wherein the pickling apparatus, the cold rolling mill, and the plating apparatus are configured to continuously connect the steel sheet. It is characterized in that it constitutes a single line for selective plating.
また、 好ましくは、 めっき処理される前記鋼板は、 厚さ 1. 2 mm以下の熱間 圧延鋼板である。  Preferably, the steel sheet to be plated is a hot-rolled steel sheet having a thickness of 1.2 mm or less.
また、 好ましくは、 前記熱間圧延鋼板は、 厚さ 1. 0 ~ 1 . 2 mmである。 また、 好ましくは、 めっき処理後の前記鋼板は厚さ 0. 6〜1 . 0 mmのめつ き鋼板である。  Preferably, the hot-rolled steel sheet has a thickness of 1.0 to 1.2 mm. Preferably, the steel sheet after the plating treatment is a plated steel sheet having a thickness of 0.6 to 1.0 mm.
また、 好ましくは、 前記熱間圧延鋼板は、 連続銪造によって得られた薄肉铸片 を熱間圧延して得られたものである。  Preferably, the hot-rolled steel sheet is obtained by hot-rolling a thin-walled piece obtained by continuous forming.
また、 好ましくは、 前記冷間圧延機は 1スタンドより構成される。  Preferably, the cold rolling mill is composed of one stand.
また、 好ましくは、 前記単一のラインの一部を構成する機器として、 前記めつ き装置の下流側に、 ガルバニール帯、 スキンパスミル、 テンションレべラー、 お よび化成処理帯のうちの少なくとも 1つが配置されている。  Preferably, as equipment constituting a part of the single line, 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.
また、 好ましくは、 前記めつき装置は、 溶融金属を内部に貯えたポッ トを含む。 そして、 本発明による鋼板の連続めつき設備によれば、 酸洗装置と冷間圧延機 とめつき装置とを備えた単一のラインのみに鋼板を通すことによって、 所望のめ つき鋼板を製造することが可能であり、 従来のように多くのラインを設置する必 要がなく、 設備コストの低減、 設置スペースの縮小、 ランニングコストの低減、 さらにはめつき鋼板の製造時間の短縮を図ることができ、 ひいては、 めっき鋼板 の製造コストを大幅に低減することができる。  Also, preferably, the plating apparatus includes a pot having molten metal stored therein. And according to the continuous steel sheet plating equipment of the present invention, 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.
このような利点は、 単一のライン内に、 酸洗装置、 冷間圧延機、 およびめつき 装置のすべてを組み込むことによって得られるものである。 このように酸洗装置、 冷間圧延機、 およびめつき装置のすべてを単一のライン内に組み込むことを可能 とするためには、 冷間圧延機における鋼板の冷間圧延が 1〜 2パスで足りること が必要である。 これについては、 近年、 1 . 0〜1. 2 mm程度の厚さの熱延鋼 板が商業的に生産可能となったので、 単一のライン内に、 めっき装置と共に冷間 圧延機を組み込み、 さらに、 冷間圧延機の上流に酸洗装置を組み込むことが可能 となつた。 These advantages are obtained by incorporating all of the pickling equipment, cold rolling mill, and plating equipment in a single line. Thus, in order to be able to incorporate all of the pickling equipment, cold rolling mill, and plating equipment in a single line, cold rolling of steel sheets in a cold rolling mill requires one or two passes. Need to be sufficient. In recent years, hot-rolled steel with a thickness of about 1.0 to 1.2 mm The commercial availability of plates has made it possible to incorporate a cold rolling mill along with a plating machine in a single line, and also a pickling machine upstream of the cold rolling mill.
また、 本発明は、 鋼板を連続的にめっき処理するための方法において、 酸を用 、て前記鋼板を洗浄する酸洗工程と、 前記鋼板を冷間圧延する冷間圧延工程と、 前記酸洗工程および前記冷間圧延行程の後に前記鋼板をめつき処理するめつきェ 程と、 を備え、 前記酸洗工程、 前記冷間圧延工程、 および前記めつき工程は、 前 記鋼板を連続的にめっき処理する単一のラインを構成することを特徴とする。 また、 好ましくは、 めっき処理される前記鋼板は、 厚さ 1. 2 mm以下の熱間 圧延鋼板である。  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. Preferably, the steel sheet to be plated is a hot-rolled steel sheet having a thickness of 1.2 mm or less.
また、 好ましくは、 前記熱間圧延鋼板は、 厚さ 1 . 0〜 1. 2 mmである。 また、 好ましくは、 めっき処理後の前記鋼板は厚さ 0. 6〜1 . 0 mmのめつ き鋼板である。  Preferably, the hot-rolled steel sheet has a thickness of 1.0 to 1.2 mm. Preferably, the steel sheet after the plating treatment is a plated steel sheet having a thickness of 0.6 to 1.0 mm.
また、 好ましくは、 前記熱間圧延鋼板は、 連続錶造によって得られた薄肉銪片 を熱間圧延して得られたものである。  Preferably, the hot-rolled steel sheet is obtained by hot-rolling a thin-walled piece obtained by continuous forming.
また、 好ましくは、 前記冷間圧延工程は 1スタンドより構成された冷間圧延機 を用いて行われる。  Preferably, the cold rolling step is performed using a cold rolling mill composed of one stand.
また、 好ましくは、 前記単一のラインの一部として、 前記めつき工程の後に、 ガルバニール帯、 スキンパスミル、 テンションレベラ一、 およびィ匕成処理帯のう ちの少なくとも 1つの機器を用いて、 めっき処理済みの前記鋼板に対して所定の 処理を施す。  Also, preferably, as a part of the single line, after the plating step, 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.
また、 好ましくは、 前記めつき工程において、 ポッ ト内に貯えられた溶融金属 に前記鋼板が浸漬される。  Also, preferably, in the plating step, the steel sheet is immersed in molten metal stored in a pot.
そして、 本発明による鋼板の連続めつき方法によれば、 酸洗工程と冷間圧延ェ 程とめっき工程とを備えた単一のラィンのみに鋼板を通すことによって、 所望の めっき鋼板を製造することが可能であり、 従来のように多くのラインを設置する 必要がなく、 設備コストの低減、 設置スペースの縮小、 ランニングコストの低減、 さらにはめつき鋼板の製造時間の短縮を図ることができ、 ひいては、 めっき鋼板 の製造コストを大幅に低減することができる。 図面の簡単な説明 . 図 1 Aは、 本発明の実施の形態による鋼板の連続めつき設備の上流部分を示し た模式図である。 According to the method for continuously plating steel sheets according to the present invention, a desired plated steel sheet is manufactured by passing the steel sheet only through a single line having an pickling step, a cold rolling step, and a plating step. 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 sheets. As a result, the manufacturing cost of the plated steel sheet can be significantly reduced. BRIEF DESCRIPTION OF THE DRAWINGS 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.
図 1 Bは、 本発明の実施の形態による鋼板の連続めつき設備の中流部分を示し た模式図である。  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.
図 1 Cは、 本発明の実施の形態による鋼板の連続めつき設備の下流部分を示し た模式図である。  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.
図 2は、 従来の鋼板のめっき設備を示した模式図である。  FIG. 2 is a schematic diagram showing a conventional steel plate plating facility.
発明を実施するための最良の形態  BEST MODE FOR CARRYING OUT THE INVENTION
以下、 本発明の実施の形態について、 図面を参照して説明する。  Hereinafter, embodiments of the present invention will be described with reference to the drawings.
図 1 A、 図 1 B、 図 1 Cは、 それぞれ、 本実施形態による鋼板の連続めつき設 備 （以下「本設備」 と言う。 ） の上流部分、 中流部分、下流部分を示した模式図 であり、 図 1 A、 図 1 B、 図 1 Cの II序で一連の鋼板の流れが示されている。 な お、 本設備は、 鋼板に対して亜鉛めつきを施すためのものである。  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.
図 1 Aに示したように本設備の上流部分は、 上流側から下流側に向かって、 巻 出しリール 1、 ウェルダー 2、 入側ルーパー 3、酸洗槽（酸洗装置） 4、 冷間圧 延機 5が順次配置されて構成されている。  As shown in Fig. 1A, 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.
リール 1は鋼板 Sのコィルを二つ同時にセットできる構成であり、 一方のコィ ルからの鋼板 Sの巻き出しが終わつたとき、 他方のコィルから続けて巻き出しが 行えるようにしている。 そして、 コイルの切り替えを行う際には、 ウェルダー 2 によつて鋼板 Sの端部同士を溶接して連結する。  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.
ルーパー 3は、 位置可変な複数のロールから構成され、 これら複数のロールに 鋼板 3カ掛け渡されている。 そして、 ロールの位置を変えることにより上流側と 下流側との間での鋼板 Sの速度差を吸収することができ、例えばウェルダー 2に よつて鋼板 Sの端部同士を溶接しているときにも、下流側へ一定速度で鋼板 Sを 送ることができる。  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.
ルーパー 3の下流側に配置された酸洗槽 4は、圧延前の鋼板 Sの表面からスケ ール （酸化鉄被膜） を除去するための手段であり、 この酸洗槽 4は、 図示を省略 した酸洗部分、 水洗部分、 および乾燥部分から構成されている。 酸洗槽 4の下流側に配置された冷間圧延機 5は、 一対のワーク口—ル 5 a、 5. bおよびそれらの外側のバックアップロールから成る、 非逆転式の 6重の圧延機 を 1スタンドのみ設け、 その前後に、 鋼板 Sに一定の張力を付加するブライドル ロール 5 c、 5 dを配置して構成されている。 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.
このように冷間圧延機 5を 1スタンドにて構成することによって、 設備コスト の低減および設置スペースの縮小を図ることができる。  By thus configuring the cold rolling mill 5 with one stand, it is possible to reduce the equipment cost and the installation space.
図 1 Bに示したように本設備の中流部分は、 上流側から下流側に向かって、 焼 鈍炉 6、 亜鉛浴ポッ ト （めっき装置） 7、 エアナイフ 8、 ガルバニール帯 9、 空 冷部 1 0、 および水冷部 1 1が順次配置されて構成されている。  As shown in Fig. 1B, 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.
焼鈍炉 6は、 上流側から順に、 加熱帯 6 a、 還元帯 6 b、 冷却帯 6 cを備えて おり、 めっき直前の鋼板 Sを、 酸化させることなく加熱して焼鈍することができ るように構成されている。  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.
めっき装置である亜鉛浴ポッ ト 7は、 鋼板 Sを浸漬してめつき処理するための 溶融亜鉛が貯留された容器であって、 その上部には、 めっき厚さを調整するため のエアナイフ 8が設けられている。  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.
ガルバニール帯 9は、 めっき層の有孔度を低減するために鋼板 Sを加熱する熱 処理装置である。 ガルバニール帯 9で加熱された鋼板 Sは、 後続の空冷部 1 0お よび水冷部 1 1において冷却される。  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.
図 1 Cに示したように本設備の下流部分は、 上流側から下流側に向かって、 ス キンパスミル 1 2、 テンションレべラー 1 3、 化成処理帯 1 4、 出側ル一パー 1 5、 オイリング装置 1 6、 および巻取りリール 1 7が順次配置されて構成されて いる。 なお、 リール 1 7の手前にシヤー （切断機） を設けるのもよい。  As shown in Fig.1C, 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. In addition, a shear (cutting machine) may be provided in front of the reel 17.
スキンパスミル 1 2は、 めつき済みの鋼板 Sに圧下率 1 ~ 3 %程度の軽圧下を かけて降伏伸びをなく し、 かつ鋼板 Sの表面を平滑化するための手段である。 テ ンシヨンレべラー 1 3は、 鋼板 Sに張力をかけることにより、 縁伸びや中伸びに よる鋼板 Sの波うちを修正して平面度を高めるものである。 また、 化成処理帯 1 4は、 鋼板 Sにクロメ一ト処理などを施すための手段である。  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.
本設備による亜鉛めつきラインに通される鋼板 Sは、 厚さ 1 . 0〜1 . 2 mm の熱延鋼板 （ホッ トコイル） である。 ここで、 熱延鋼板としては、 いわゆる薄ス ラブ連铸によって製造された厚さ 5 0 mm程度の薄肉錶片を、 1 . 0〜1 , 2 m - mの所望の厚さまで圧延したものを使用することが好ましい。 なぜなら、 厚さが 2 0 0 mmを超える通常の連铸スラブをこのような厚さまで熱間圧延するとした ら、 特殊な熱間圧延機が必要になり、 コスト力膨大になってしまい、 商業上の実 現可能性、 つまり採算性を考慮した場合の実現可能性は極めて低いからである。 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. Here, the so-called thin steel sheet is used as the hot-rolled steel sheet. It is preferable to use a thin piece having a thickness of about 50 mm manufactured by the rubbing and rolled to a desired thickness of 1.0 to 1.2 m-m. This is because if a normal continuous slab with a thickness of more than 200 mm is hot-rolled to such a thickness, a special hot-rolling mill would be required, and the cost power would be enormous. This is because the feasibility of the project, that is, the feasibility of considering the profitability, is extremely low.
補足して説明すれば、 近年商業的生産が開始された薄スラブ铸造は、 その錶造 設備のコストが通常の連铸に比べて低く、 また、 仕上げ圧延機の手前にトンネル 炉等を配置することにより圧延温度を高く維持し、 これにより厚さ 1. 0 mmの 薄板の商業生産を可能としている。  As a supplementary explanation, 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.
なお、 鋼板 Sを得るための薄肉铸片は厚さ 5 0 mm程度のものには限られない が、 いずれにしても、 熱間圧延によって容易に 1 . 2 mm以下の厚さにできるも の力好ましい。  Note that 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.
上述した厚さ 1. 0〜1. 2 mmの熱延鋼板 Sを、 本設備による亜鉛めつきラ インに通し、 酸洗槽 4において、 鋼板 Sの表面を酸洗し、 水洗いし、 さらに乾燥 する。 そして、 表面のスケールが除去された鋼板 Sは、 冷間圧延機 5によって冷 間圧延され、 焼鈍炉 6において焼鈍された後、 亜鉛浴ポッ 卜 7において亜鉛めつ さされる。  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.
亜鉛めつきされた鋼板 Sは、 ガルノく二一ル帯 9にてガルノく二一ル処理された後、 スキンパスミル 1 2およびテンションレべラー 1 3にて表面の平滑度、 平面度が 高められ、 ィ匕成処理帯 1 4等で必要な処理が成された後にリール 1 7に巻き取ら れ 。  After 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.
上述したように本設備の冷間圧延機 5は 1スタンドのみで構成されると共に、 逆転式ではなく非逆転式なので鋼板 Sを複数回通すことができず、 このため、 設 備構造の簡素化が図れるものの、 鋼板 Sの圧下率が約 4 0 %以下と低めである。  As described above, 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. However, the rolling reduction of steel sheet S is as low as about 40% or less.
しかし、 前記の如く厚さ 1. 0〜1. 2 mmの熱延鋼板 Sを材料とするので、 1 スタンドの冷間圧延機 5を備えた本設備を用いて、 0. 6〜0. 8 mm又はその 前後の厚さを有する冷延めっき鋼板を得ることができる。 圧下率が高くないため に製品の絞り特性 （r値） は、 7 0〜 8 0 %の圧下をかけた従来品に比べてやや 劣る力 深絞り加工を予定しない軽加工用鋼板としての用途を有し、 本設備によ り製造されためつき鋼板は、 製品として十分な用途を有している。 . なお、 本設備による連続めつきラインによって製造できる製品は、 冷延鋼板の 溶融亜鉛めつき製品には限られず、 以下に述べるような各種の方法を用いること によって、 他の各種の製品を製造することができる。 However, as described above, since 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.
第 1の方法としては、 冷間圧延機 5の一対のワークロール 5 a、 5 b同士の間 をオープンにした状態で冷間圧延機 5に鋼板 Sを通すことにより、 冷間圧延が施 されていない熱延鋼板の亜鉛めつき製品を製造することができる。  As a first method, 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.
第 2の方法としては、 ポッ ト 7内に、 溶融亜鉛に代えて溶融アルミニウム等の 他の溶融金属を入れることにより、 亜鉛めつきではなくアルミめつき等を施した 鋼板 Sを製造することができる。  As a second method, it is possible to manufacture a steel sheet S which has been subjected to aluminum plating instead of zinc plating by putting other molten metal such as molten aluminum in the pot 7 instead of molten zinc. it can.
第 3の方法としては、 ポッ ト 7内に溶融金属を何も入れておかなければ、 冷間 圧延が施された焼鈍済みの冷延鋼板であつて、 めっき処理がなされていないもの を得ることができる。 この場合、 上記第 1の方法の要領で冷間圧延をかけないよ うにすれば、 酸洗のみを施した熱延鋼板を得ることができる。  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.
第 4の方法としては、 ポッ ト 7の下流側にあるガルバニール帯 8やスキンパス ミル 1 2、 テンションレベラ一 1 3、 ィ匕成処理帯 1 4についても、 それらの機器 の使用 ·不使用を適宜選択することにより、 所望の仕様を備えた鋼板を、 適切な コストにて製造することができる。  As a fourth method, 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. By making a selection, a steel sheet having desired specifications can be manufactured at an appropriate cost.
以上要するに本実施形態においては、 要求される製品の仕様に応じて、 経済的 な合理性を考慮した最適の製造方法を採用して所望の製品を得ることができる。 上述した本実施形態の一変形例としては、 図 1 Aに示した冷間圧延機 5を、 1 スタンドではなく、 2スタンド （又はそれ以上） にすることができる。 冷間圧延 機 5のスタンド数を増やすことにより、 鋼板 Sの圧下率を高くすることができ、 より薄い鋼板を製造することが可能となる。  In short, in the present embodiment, a desired product can be obtained by adopting an optimal manufacturing method in consideration of economic rationality according to a required product specification. As a modified example of the above-described embodiment, 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.
産業上の利用可能性  Industrial applicability
本発明は、 0. 6〜1. 0 mm程度の厚さを有するめっき鋼板を連続的に製造 するための設備および方法として広く適用することができる。  INDUSTRIAL APPLICABILITY 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.

Claims

請 求 の 範 囲 The scope of the claims
1 . 鋼板を連続的にめっき処理するための設備において、 1. In equipment for continuous plating of steel sheets,
酸を用いて前記鋼板を洗浄する酸洗装置と、  An pickling apparatus for cleaning the steel sheet using an acid,
前記鋼板を冷間圧延する冷間圧延機と、  A cold rolling mill for cold rolling the steel sheet,
前記酸洗装置および前記冷間圧延機の設置位置よりも、 前記鋼板の流れ方向の 下流側に配置され、 前記鋼板をめつき処理するためのめっき装置と、 を備え、 前記酸洗装置、 前記冷間圧延機、 および前記めつき装置は、 前記鋼板を連続的 にめつき処理するための単一のラインを構成していることを特徴とする鋼板の連 続めつき設備。  A plating device disposed downstream of the installation position of the pickling apparatus and the cold rolling mill in the flow direction of the steel sheet, for plating the steel sheet; A continuous rolling equipment for steel sheets, wherein the cold rolling mill and the plating device constitute a single line for continuously plating the steel sheet.
2. めっき処理される前記鋼板は、 厚さ 1. 2 mm以下の熱間圧延鋼板であ ることを特徴とする請求の範囲第 1項に記載の鋼板の連続めつき設備。  2. The steel sheet continuous plating equipment according to claim 1, wherein the steel sheet to be plated is a hot-rolled steel sheet having a thickness of 1.2 mm or less.
3 . 前記熱間圧延鋼板は、 厚さ 1 . 0〜1. 2 mmであることを特徴とする 請求の範囲第 2項に記載の鋼板の連続めつき設備。  3. The continuous steel sheet plating equipment according to claim 2, wherein the hot-rolled steel sheet has a thickness of 1.0 to 1.2 mm.
4. めっき処理後の前記鋼板は厚さ 0. 6〜1. 0 mmのめつき鋼板である こと特徴とする請求の範囲第 3項に記載の鋼板の連続めつき設備。  4. The continuous steel sheet plating equipment according to claim 3, wherein the steel sheet after plating is a plated steel sheet having a thickness of 0.6 to 1.0 mm.
5. 前記熱間圧延鋼板は、 連続鎢造によって得られた薄肉铸片を熱間圧延し て得られたものであることを特徴とする請求の範囲第 2項乃至第 4項のいずれか 一項に記載の鋼板の連続めつき設備。  5. The hot-rolled steel sheet according to claim 2, wherein the hot-rolled steel sheet is obtained by hot-rolling a thin piece obtained by continuous forming. The continuous plating equipment for steel sheets according to the item.
6 . 前記冷間圧延機は 1スタンドより構成されることを特徴とする請求の範 囲第 1項乃至第 5項のいずれか一項に記載の鋼板の連続めつき設備。  6. The steel plate continuous plating equipment according to any one of claims 1 to 5, wherein the cold rolling mill comprises one stand.
7. 前記単一のラインの一部を構成する機器として、 前記めつき装置の下流 側に、 ガルバニール帯、 スキンパスミル、 テンションレべラー、 および化成処理 帯のうちの少なくとも 1つが配置されていることを特徴とする請求の範囲第 1項 乃至第 6項のいずれか一項に記載の鋼板の連続めつき設備。  7. As a part of the single line, at least one of a galvanizing zone, a skin pass mill, a tension leveler, and a chemical conversion zone is arranged downstream of the plating device. The continuous steel plate mounting equipment according to any one of claims 1 to 6, characterized in that:
8 . 前記めつき装置は、 溶融金属を内部に貯えたポッ トを含むことを特徴と する請求の範囲第 1項乃至第 7項のいずれ力、一項に記載の鋼板の連続めつき設備。  8. The continuous plating equipment for steel sheets according to claim 1, wherein the plating device includes a pot having a molten metal stored therein.
9 . 鋼板を連続的にめっき処理するための方法において、  9. In a method for continuously plating a steel sheet,
酸を用いて前記鋼板を洗浄する酸洗工程と、 前記鋼板を冷間圧延する冷間圧延工程と、 An acid washing step of washing the steel sheet with an acid, A cold rolling step of cold rolling the steel sheet,
前記酸洗工程および前記冷間圧延行程の後に前記鋼板をめっき処理するめつき 工程と、 を備え、  A plating step of plating the steel sheet after the pickling step and the cold rolling step,
前記酸洗工程、 前記冷間圧延工程、 および前記めつき工程は、 前記鋼板を連続 的にめっき処理する単一のラインを構成することを特徴とする鋼板の連続めつき 方法。  The method for continuously plating steel sheets, wherein the pickling step, the cold rolling step, and the plating step constitute a single line for continuously plating the steel sheet.
1 0. めつき処理される前記鋼板は、 厚さ 1. 2 mm以下の熱間圧延鋼板で あることを特徴とする請求の範囲第 9項に記載の鋼板の連続めつき方法。  10. The continuous plating method for a steel sheet according to claim 9, wherein the steel sheet to be plated is a hot-rolled steel sheet having a thickness of 1.2 mm or less.
1 1. 前記熱間圧延鋼板は、 厚さ 1. 0〜1. 2 mmであることを特徴とす る請求の範囲第 1 0項に記載の鋼板の連続めつき方法。  11. The continuous steel sheet plating method according to claim 10, wherein the hot-rolled steel sheet has a thickness of 1.0 to 1.2 mm.
1 2. めっき処理後の前記鋼板は厚さ 0. 6〜 1. 0 mmのめつき鋼板であ ること特徴とする請求の範囲第 1 1項に記載の鋼板の連続めつき方法。  12. The continuous steel sheet plating method according to claim 11, wherein the steel sheet after the plating treatment is a plated steel sheet having a thickness of 0.6 to 1.0 mm.
1 3. 前記熱間圧延鋼板は、 連続铸造によって得られた薄肉铸片を熱間圧延 して得られたものであることを特徴とする請求の範囲第 1 0項乃至第 1 2項のい ずれか一項に記載の鋼板の連続めつき方法。  13. The hot-rolled steel sheet according to claim 10, wherein the hot-rolled steel sheet is obtained by hot-rolling a thin-walled piece obtained by continuous forming. The method for continuous plating of a steel sheet according to any one of the preceding claims.
1 4. 前記冷間圧延工程は 1スタンドより構成された冷間圧延機を用いて行 われることを特徴とする請求の範囲第 9項乃至第 1 3項の 、ずれか一項に記載の 鋼板の連続めつき方法。  14. The steel sheet according to any one of claims 9 to 13, wherein the cold rolling step is performed using a cold rolling mill including one stand. Continuous plating method.
1 5. 前記単一のラインの一部として、 前記めつき工程の後に、 ガルバニー ル帯、 スキンパスミル、 テンションレべラー、 および化成処理帯のうちの少なく とも 1つの機器を用いて、 めっき処理済みの前記鋼板に対して所定の処理を施す ことを特徴とする請求の範囲第 9項乃至第 1 4項のいずれか一項に記載の鋼板の 連続めつき方法。  1 5. As part of the single line, after the plating step, plating using at least one of the following components: galvanizing zone, skin pass mill, tension leveler, and chemical conversion zone The method according to any one of claims 9 to 14, wherein a predetermined treatment is performed on the finished steel sheet.
1 6. 前記めつき工程において、 ポット内に貯えられた溶融金属に前記鋼板 力ゃ浸漬されることを特徴とする請求の範囲第 9項乃至第 1 5項のいずれか一項に 記載の鋼板の連続めつき方法。  1 6. The steel sheet according to any one of claims 9 to 15, wherein in the plating step, the steel sheet is immersed in molten metal stored in a pot. Continuous plating method.
PCT/JP1999/003879 1998-07-17 1999-07-19 Equipment and method for continuous plating of steel sheet WO2000003816A1 (en)

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WO2015149960A1 (en) * 2014-03-31 2015-10-08 Primetals Technologies Austria GmbH Equipment and process for the pickling and metallic coating of a metal strip
EP3097218B1 (en) 2014-01-22 2019-09-25 SMS group GmbH Method and system for hot-dip coating hot-rolled steel strips
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WO2015149960A1 (en) * 2014-03-31 2015-10-08 Primetals Technologies Austria GmbH Equipment and process for the pickling and metallic coating of a metal strip
WO2020162848A1 (en) * 2019-02-08 2020-08-13 İlhan Demi̇r Çeli̇k Ve Boru Profi̇l Endüstri̇si̇ Anoni̇m Şi̇rketi̇ Cold rolled hot sheet metal (chr) and the production method of cold rolled hot steel roll (chrc)

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