JPH03230849A - Continuous casting apparatus for casting strip - Google Patents
Continuous casting apparatus for casting stripInfo
- Publication number
- JPH03230849A JPH03230849A JP2213990A JP2213990A JPH03230849A JP H03230849 A JPH03230849 A JP H03230849A JP 2213990 A JP2213990 A JP 2213990A JP 2213990 A JP2213990 A JP 2213990A JP H03230849 A JPH03230849 A JP H03230849A
- Authority
- JP
- Japan
- Prior art keywords
- cooling drum
- divided
- cooling
- brush roll
- brush
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
Landscapes
- Continuous Casting (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ツインドラム方式のように冷却ドラムの周面
の一部に湯溜り部を形成し、そこに注入した溶融金属を
冷却・凝固して、薄肉鋳片を製造（１）
する連続鋳造装置に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention involves forming a pool on a part of the circumferential surface of a cooling drum, as in the twin-drum system, and cooling and solidifying molten metal poured into the pool. The present invention relates to a continuous casting apparatus for manufacturing thin-walled slabs (1).
近来、溶鋼等の溶融金属から直接最終形状に近い数ｍｍ
〜数＋ｍｍ程度の肉厚をもつ薄肉鋳片を製造する方法が
注目されている。この種の連続鋳造法によるとき、従来
のような多段階にわたる熱延工程を必要とせず、また最
終形状への圧延も軽度なもので済むため、工程及び設備
の簡略化が図られる。Recently, several millimeters close to the final shape have been produced directly from molten metal such as molten steel.
A method of manufacturing a thin cast slab having a wall thickness of approximately several mm is attracting attention. When this type of continuous casting method is used, a multi-step hot rolling process as in the conventional method is not required, and rolling to the final shape can be performed only lightly, so that the process and equipment can be simplified.
この種の連続鋳造法として、互いに逆方向に回転する一
対の冷却ドラムの間に湯溜り部を形成するツインドラム
方式、冷却ドラムとベルトとの間に湯溜り部を形成する
ドラム−ベルト方式、−本の冷却ドラム周面の一部に湯
溜り部を形成する単ドラム方式等がある。これらの方式
においては、いずれも冷却ドラムの表面に接する部分で
、溶融金属の冷却・凝固が進行し、凝固シェルを生成す
る。そのため、冷却ドラムの表面状態が凝固シェルの表
面性状に与える影響は大きい。たとえば、（２）
冷却ドラムの表面に酸化物被膜が生成したり、湯溜り部
からの不純物が付着、堆積したりすると、その表面状態
が不均一となり、冷却条件が局部的に異なってくる。そ
の結果、凝固シェルの成長が一様ではなくなり、肉厚の
不揃いな薄肉鋳片が製造される。また、この不均一な表
面状態は、局部的な応力集中を凝固シェルに与え、薄肉
鋳片に割れを発生させる原因となる。This type of continuous casting method includes a twin-drum method in which a pool is formed between a pair of cooling drums rotating in opposite directions, a drum-belt method in which a pool is formed between a cooling drum and a belt, - There is a single-drum method in which a water reservoir is formed on a part of the circumferential surface of the book cooling drum. In all of these methods, cooling and solidification of the molten metal proceed at the portion in contact with the surface of the cooling drum, producing a solidified shell. Therefore, the surface condition of the cooling drum has a large influence on the surface quality of the solidified shell. For example, (2) if an oxide film is formed on the surface of the cooling drum, or if impurities from the pool are attached or deposited, the surface condition will become non-uniform and the cooling conditions will differ locally. As a result, the growth of the solidified shell becomes uneven, and thin slabs with uneven wall thickness are manufactured. Moreover, this non-uniform surface condition causes localized stress concentration on the solidified shell, causing cracks to occur in the thin slab.
このような冷却ドラムの表面状態均一化を図るたｔ１特
開昭６０−１８４４４９号公報、特開昭６２−１７６６
５０号公報等にあっては、冷却ドラムの表面に付着した
異物を除去するブラシロールを配置することが示されて
いる。このブラシロールによる研磨で、冷却ドラムは、
常に清浄な表面状態を維持し、酸化物被膜や不純物等の
異物による悪影響を排除することができる。In order to make the surface condition of such a cooling drum uniform, t1 JP-A-60-184449 and JP-A-62-1766 have been proposed.
No. 50, etc., discloses that a brush roll is provided to remove foreign matter adhering to the surface of the cooling drum. By polishing with this brush roll, the cooling drum is
It is possible to always maintain a clean surface condition and eliminate the negative effects of foreign substances such as oxide films and impurities.
しかしながら、このようにブラシロールによって冷却ド
ラムの表面を研磨しながら連続鋳造する（３）
陥の発生することが判明した。本発明者等は、この割れ
発生のメカニズムを究明したところ、ブラシロールによ
って研磨された冷却ドラムの表面状態に大きく影響され
るものであることを究明した。However, it has been found that continuous casting while polishing the surface of the cooling drum with the brush roll (3) causes defects. The present inventors have investigated the mechanism by which this cracking occurs and have found that it is greatly influenced by the surface condition of the cooling drum polished by the brush roll.
すなわち、前記のブラシロールは冷却ドラムの軸方向に
沿ってはＸ′該ドラム幅一杯にわたりその表面に接触し
ているので、スプリングで冷却ドラム表面に押圧された
構造であっても一本のブラシロールであるためにブラシ
の当りムラが発生し易く、この当りムラは冷却ドラム表
面に凹凸面を形成する。In other words, since the brush roll is in contact with the surface of the cooling drum over the entire width of the drum along the axial direction, even if the brush roll is pressed against the surface of the cooling drum by a spring, only one brush can be used. Since it is a roll, uneven brush contact tends to occur, and this uneven contact forms an uneven surface on the surface of the cooling drum.
このような冷却ドラムで薄鋳片を製造すると、冷却ドラ
ム表面に生じた凹凸面の境界部分から鋳片表面に割れが
生じるのである。When thin slabs are produced using such a cooling drum, cracks occur on the slab surface at the boundary between the uneven surfaces formed on the cooling drum surface.
本発明は、かＮる冷却ドラム表面へのブラシロール当り
ムラを防止することを目的とする。An object of the present invention is to prevent uneven brush roll contact with the cooling drum surface.
本発明の連続鋳造装置は、その目的を達成する（４）
ために、前記冷却ドラムの表面に接して、冷却ドラム軸
方向に分割したブラシロールを、それぞれ独立して冷却
ドラム表面に押圧可能に設け、さらに、前記ブラシロー
ルに近接して、前記分割したブラシロールの軸方向の間
隙に、冷却ドラム軸方向に分割した他のブラシロールを
、それぞれ独立して冷却ドラム表面に抑圧可能に配設し
たことを特徴とする。In order to achieve the objective (4), the continuous casting apparatus of the present invention has brush rolls that are in contact with the surface of the cooling drum and are divided in the axial direction of the cooling drum, each of which can be independently pressed against the surface of the cooling drum. Further, adjacent to the brush roll, other brush rolls divided in the axial direction of the cooling drum are arranged in the axial gaps between the divided brush rolls so that they can be independently suppressed on the surface of the cooling drum. It is characterized by what it did.
本発明はブラシロールを分割し、該分割ロールにスプリ
ング等を設けてそれぞれ冷却ドラム表面に押圧するよう
に構成したので、分割ブラシロールそれぞれは均等な押
圧力で冷却ドラム表面を圧接し、付着した異物を除去す
る。さらに同様の構造をもつ別の分割ブラシロールを該
ブラシロールの表面が前記ブラシロールの軸方向の間隙
に面するように配置してブラシ研磨するので、冷却ドラ
ム表面の全域にわたりムラなく付着異物が除去されるの
である。In the present invention, the brush roll is divided into parts, and each of the divided rolls is equipped with a spring or the like so as to be pressed against the surface of the cooling drum. Therefore, each of the divided brush rolls is pressed against the surface of the cooling drum with an equal pressing force, and the parts are adhered to the surface of the cooling drum. Remove foreign objects. Further, another divided brush roll having a similar structure is arranged so that the surface of the brush roll faces the gap in the axial direction of the brush roll, and the brush polishing is performed, so that foreign matter adheres evenly over the entire surface of the cooling drum. It will be removed.
（５） 〔実施例〕 以下、図面により本発明の一実施例を詳細に説明する。(5) 〔Example〕 Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.
第１図において、冷却ドラムＩＩＡの表面に接して該冷
却ドラム軸１２Ａに平行に１段目のブラシロールＩＡ・
ＩＢを配置する。該ブラシロールＩＡはその軸３Ａに固
着され、該軸３Ａは軸受け４Ａによって支持されており
、該軸受け４Ａの下端に支点軸６が貫通している。ブラ
シロールＩＡ両サイドの該軸受４Ａ間に支持枠７Ａが設
けられ、該支持枠７Ａに、ピン８Ａを介してスプリング
５Ａが連結されている。In FIG. 1, the first brush roll IA is in contact with the surface of the cooling drum IIA and parallel to the cooling drum shaft 12A.
Place IB. The brush roll IA is fixed to its shaft 3A, and the shaft 3A is supported by a bearing 4A, and a fulcrum shaft 6 passes through the lower end of the bearing 4A. A support frame 7A is provided between the bearings 4A on both sides of the brush roll IA, and a spring 5A is connected to the support frame 7A via a pin 8A.
ブラシロール軸３Ａはモーター９によりベルトを介して
冷却ロールＩＩＡの回転方向と逆方向に回転する。The brush roll shaft 3A is rotated by a motor 9 via a belt in a direction opposite to the rotation direction of the cooling roll IIA.
ブラシロールＩＢは前述のブラシロールＩＡと同一の構
造になっている。たソ゛シ、支点軸６はブラシロールＩ
Ａ、ＩＢ共通の回転軸として構成しており、また、ブラ
シロールＩＢは、ブラシロールＩＡと共に架台２上に載
置されている。Brush roll IB has the same structure as brush roll IA described above. The fulcrum shaft 6 is the brush roll I.
The brush rolls A and IB are configured as a common rotating shaft, and the brush roll IB is placed on the pedestal 2 together with the brush roll IA.
一方、２段目のブラシロール１０Ａ、１０Ｂ、１０Ｃ（
６）
は前述のブラシロールＩＡ、ＩＢに近接して配置され、
特に、ブラシロールＩＯＢがブラシロールＩＡとＩＢの
間隙に相対する位置に、また、ブラシロール１０Ａ、１
０ＣはブラシロールＩＡ、ＩＢの端部に相対する位置に
それぞれ配置されている。On the other hand, the second stage brush rolls 10A, 10B, 10C (
6) is arranged close to the brush rolls IA and IB mentioned above,
In particular, the brush roll IOB is positioned opposite to the gap between the brush rolls IA and IB, and the brush rolls 10A,
0C are arranged at positions facing the ends of the brush rolls IA and IB, respectively.
各ブラシロールＩＯＡ 、 ＩＯＢ 、 ＩＯＣの構造
はブラシロールＩＡ、１Ｂと同様の構造になっている（
詳細は省略する）。The structure of each brush roll IOA, IOB, and IOC is similar to that of brush rolls IA and 1B (
(details omitted).
本発明は、以上のような構造になっていて、１段目のブ
ラシロールＩＡ、ＩＢが狭いロール幅で均等に冷却ドラ
ム表面をスプリング５Ａ、５Ｂにより押圧し、かつ、２
段目のブラシロール１０Ａ。The present invention has the above-described structure, in which the first-stage brush rolls IA and IB press the surface of the cooling drum evenly with a narrow roll width using springs 5A and 5B, and
Stage brush roll 10A.
１０Ｂ・１０Ｃが同様に１段目のブラシロールの間隙を
補う位置において、狭いロール幅で均等に冷却ドラム表
面をスプリングにより押圧する。したがって、冷却ドラ
ム表面の全域にわたり、ブラシロールを均等な押圧力で
押しつけて研磨することができるので、ブラシロールの
当りムラがなくなり、その結果、鋳片表面の割れ発生を
防止することができる。10B and 10C similarly press the surface of the cooling drum with a spring evenly with a narrow roll width at a position that compensates for the gap between the first stage brush rolls. Therefore, the entire surface of the cooling drum can be polished by pressing the brush roll with a uniform pressing force, which eliminates uneven contact of the brush roll, and as a result, it is possible to prevent the occurrence of cracks on the surface of the slab.
（７）
第１図に示す実施例は一例であって、ブラシロールの軸
方向の分割は任意にでき、また、必要により２段だけで
なく３段以上のブラシロール群を構成することもできる
。(7) The embodiment shown in Fig. 1 is an example, and the brush roll can be divided in the axial direction as desired, and if necessary, it is also possible to configure a brush roll group of not only two stages but three or more stages. .
第１図の装置による本発明の場合と、従来の１本のブラ
シロールで研磨する比較例の場合の得られた薄肉鋳片の
表面状態を比較した。The surface conditions of thin slabs obtained in the case of the present invention using the apparatus shown in FIG. 1 and in the case of a comparative example in which polishing was performed using a conventional single brush roll were compared.
まず、冷却ドラムに対するそれぞれのブラシロールの押
圧力は、本発明の１段目で０．５〜５ｋｇに、また、２
段目でも０．５〜５ｋｇの範囲で１段目と独立に設定し
、比較例も０．５〜５ｋｇに設定した。そして、温度１
４６０〜１４８０℃の溶鋼から肉厚１．５〜６ｍｍ、板
幅８００闘の薄肉鋳片を１０〜２００ ｍ７分の鋳造速
度で製造した。鋳片に発生した割れは、鋳片を酸洗した
後で、その表面を目視観察し、１ ｍ＋内に発生した割
れを総長（ｍ）で比較することにより判定した。その結
果、本発明例の場合は縦割れ、横割れともになく、割れ
発生量でＯｍ ／ ｍ’、比較例においては縦割れ０．
１ｍ／ｍ’、横割れ０．２ｍ／ｍ゛程度の発生量の割れ
が認められた。First, the pressing force of each brush roll against the cooling drum is 0.5 to 5 kg in the first stage of the present invention;
The weight of the second stage was set independently from the first stage within the range of 0.5 to 5 kg, and the weight of the comparative example was also set to 0.5 to 5 kg. And temperature 1
Thin slabs with a wall thickness of 1.5 to 6 mm and a plate width of 800 cm were manufactured from molten steel at a temperature of 460 to 1480°C at a casting speed of 10 to 200 m7. Cracks that occurred in the slab were determined by visually observing the surface of the slab after pickling and comparing the total length (m) of cracks that occurred within 1 m+. As a result, in the case of the example of the present invention, there was no vertical crack or horizontal crack, and the amount of crack occurrence was Om/m', and in the comparative example, the vertical crack was 0.
Cracking was observed at a rate of approximately 1 m/m' and horizontal cracking of approximately 0.2 m/m'.
（８）
〔発明の効果〕
以上の通り、本発明は冷却ドラム表面全域にわたりブラ
シロールの均等抑圧を可能にしたので、冷却ドラム表面
に研磨ムラが発生することがなくなり、その結果、縦割
れ、横割れの欠陥のない優れた表面性状をもつ薄肉鋳片
を製造することができ、工業的効果は大きい。(8) [Effects of the Invention] As described above, the present invention makes it possible to uniformly suppress the brush roll over the entire surface of the cooling drum, thereby eliminating the occurrence of uneven polishing on the surface of the cooling drum, and as a result, vertical cracks and Thin slabs with excellent surface properties without defects such as transverse cracks can be produced, which has great industrial effects.
第１図は本発明の実施例を示す概略斜視図である。
ＬＡ、ＩＢ・・・ブラシロール、
２・・・架台、 ３Ａ、３Ｂ・・・軸、
４Ａ、４Ｂ・・・軸受、
５Ａ、５Ｂ・・・スプリング、
６・・・支点軸、 ７Ａ、７Ｂ・・・支持
枠、８Ａ、８Ｂ・・・ピン、 ９・・・モーター
１０Ａ、ＩＯＢ・ＩＯＣ・・・ブラシロール、１１Ａ、
ＩＩＢ・・・冷却ドラム、
１２Ａ、１２Ｂ・・・冷却ドラム軸、１３・・・サイド
堰、１４・・・湯溜り部、 １５・・・薄肉
鋳片。
（９）FIG. 1 is a schematic perspective view showing an embodiment of the present invention. LA, IB... Brush roll, 2... Frame, 3A, 3B... Shaft,
4A, 4B...bearing, 5A, 5B...spring, 6...fulcrum shaft, 7A, 7B...support frame, 8A, 8B...pin, 9...motor 10A, IOB/IOC ...Brush roll, 11A,
IIB...Cooling drum, 12A, 12B...Cooling drum shaft, 13...Side weir, 14...Sump portion, 15...Thin slab. (9)
Claims (1)
部に注入された溶融金属を前記冷却ドラムの周面で冷却
、凝固しながら薄肉鋳片を製造する連続鋳造装置におい
て、前記冷却ドラムの表面に接して、冷却ドラム軸方向
に分割したブラシロールを、それぞれ独立して冷却ドラ
ム表面に押圧可能に設け、さらに、前記ブラシロールに
近接して、前記分割したブラシロールの軸方向の間隙に
、冷却ドラム軸方向に分割した他のブラシロールを、そ
れぞれ独立して冷却ドラム表面に押圧可能に配設したこ
とを特徴とする薄肉鋳片の連続鋳造装置。In a continuous casting device, a molten metal pool is formed in a part of the circumferential surface of a cooling drum, and the molten metal injected into the molten metal is cooled and solidified on the circumferential surface of the cooling drum to produce a thin slab, In contact with the surface of the cooling drum, brush rolls divided in the axial direction of the cooling drum are provided so as to be able to press each independently against the surface of the cooling drum, and further, in proximity to the brush roll, the shafts of the divided brush rolls are provided. 1. A continuous casting device for thin-walled slabs, characterized in that other brush rolls divided in the axial direction of the cooling drum are arranged in gaps in the direction so as to be able to press each other independently against the surface of the cooling drum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2213990A JPH0716770B2 (en) | 1990-02-02 | 1990-02-02 | Continuous casting equipment for thin cast pieces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2213990A JPH0716770B2 (en) | 1990-02-02 | 1990-02-02 | Continuous casting equipment for thin cast pieces |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03230849A true JPH03230849A (en) | 1991-10-14 |
| JPH0716770B2 JPH0716770B2 (en) | 1995-03-01 |
Family
ID=12074551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2213990A Expired - Lifetime JPH0716770B2 (en) | 1990-02-02 | 1990-02-02 | Continuous casting equipment for thin cast pieces |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0716770B2 (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998008637A3 (en) * | 1996-08-27 | 1998-05-07 | Davy Int Ltd | Roll caster parting agent |
| FR2771034A1 (en) * | 1997-11-14 | 1999-05-21 | Ishikawajima Harima Heavy Ind | Method and device for the casting of thin strip on casting roll |
| KR100544613B1 (en) * | 2001-12-22 | 2006-01-24 | 주식회사 포스코 | Surface roll removal device of casting roll in twin roll sheet casting machine |
| KR100605677B1 (en) * | 1999-08-26 | 2006-07-31 | 주식회사 포스코 | Roll surface brushing method in sheet casting machine |
| US7296614B2 (en) | 2004-12-13 | 2007-11-20 | Nucor Corporation | Method and apparatus for controlling the formation of crocodile skin surface roughness on thin cast strip |
| JP2008114281A (en) * | 2006-11-08 | 2008-05-22 | Ihi Corp | Roll grinding machine |
| JP2008279457A (en) * | 2007-05-08 | 2008-11-20 | Nippon Steel Corp | Method and apparatus for producing amorphous alloy ribbon |
| US7891407B2 (en) | 2004-12-13 | 2011-02-22 | Nucor Corporation | Method and apparatus for localized control of heat flux in thin cast strip |
| US8312917B2 (en) | 2004-12-13 | 2012-11-20 | Nucor Corporation | Method and apparatus for controlling the formation of crocodile skin surface roughness on thin cast strip |
| US8316920B2 (en) | 2008-11-20 | 2012-11-27 | Nucor Corporation | Brush roll for casting roll |
| JP5104943B2 (en) * | 2008-03-21 | 2012-12-19 | 株式会社Ｉｈｉ | Roll polishing equipment |
| WO2014047746A1 (en) * | 2012-09-27 | 2014-04-03 | 宝山钢铁股份有限公司 | Method and apparatus for cleaning twin-roller, thin band, continuous casting roller face |
-
1990
- 1990-02-02 JP JP2213990A patent/JPH0716770B2/en not_active Expired - Lifetime
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998008637A3 (en) * | 1996-08-27 | 1998-05-07 | Davy Int Ltd | Roll caster parting agent |
| FR2771034A1 (en) * | 1997-11-14 | 1999-05-21 | Ishikawajima Harima Heavy Ind | Method and device for the casting of thin strip on casting roll |
| JPH11207445A (en) * | 1997-11-14 | 1999-08-03 | Ishikawajima Harima Heavy Ind Co Ltd | Metal strip casting method, strip casting apparatus for casting metal strip, and twin roll strip casting apparatus |
| KR100605677B1 (en) * | 1999-08-26 | 2006-07-31 | 주식회사 포스코 | Roll surface brushing method in sheet casting machine |
| KR100544613B1 (en) * | 2001-12-22 | 2006-01-24 | 주식회사 포스코 | Surface roll removal device of casting roll in twin roll sheet casting machine |
| US7299857B2 (en) | 2004-12-13 | 2007-11-27 | Nucor Corporation | Method and apparatus for localized control of heat flux in thin cast strip |
| US7296614B2 (en) | 2004-12-13 | 2007-11-20 | Nucor Corporation | Method and apparatus for controlling the formation of crocodile skin surface roughness on thin cast strip |
| US7891407B2 (en) | 2004-12-13 | 2011-02-22 | Nucor Corporation | Method and apparatus for localized control of heat flux in thin cast strip |
| US8312917B2 (en) | 2004-12-13 | 2012-11-20 | Nucor Corporation | Method and apparatus for controlling the formation of crocodile skin surface roughness on thin cast strip |
| JP2008114281A (en) * | 2006-11-08 | 2008-05-22 | Ihi Corp | Roll grinding machine |
| JP2008279457A (en) * | 2007-05-08 | 2008-11-20 | Nippon Steel Corp | Method and apparatus for producing amorphous alloy ribbon |
| JP5104943B2 (en) * | 2008-03-21 | 2012-12-19 | 株式会社Ｉｈｉ | Roll polishing equipment |
| US8316920B2 (en) | 2008-11-20 | 2012-11-27 | Nucor Corporation | Brush roll for casting roll |
| WO2014047746A1 (en) * | 2012-09-27 | 2014-04-03 | 宝山钢铁股份有限公司 | Method and apparatus for cleaning twin-roller, thin band, continuous casting roller face |
| US9770756B2 (en) | 2012-09-27 | 2017-09-26 | Baoshan Iron & Steel Co., Ltd. | Method and device for cleaning a surface of a twin-roller continuous thin strip casting roller |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0716770B2 (en) | 1995-03-01 |
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