JPS60210342A - Casting method of thin metallic sheet by twin rolls - Google Patents

Casting method of thin metallic sheet by twin rolls

Info

Publication number
JPS60210342A
JPS60210342A JP6327984A JP6327984A JPS60210342A JP S60210342 A JPS60210342 A JP S60210342A JP 6327984 A JP6327984 A JP 6327984A JP 6327984 A JP6327984 A JP 6327984A JP S60210342 A JPS60210342 A JP S60210342A
Authority
JP
Japan
Prior art keywords
rolls
molten metal
casting
nozzle
flow
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.)
Pending
Application number
JP6327984A
Other languages
Japanese (ja)
Inventor
Akio Kasama
昭夫 笠間
Shozo Mizoguchi
溝口 庄三
Michitoshi Ito
井藤 三千寿
Masaharu Konno
今野 正春
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP6327984A priority Critical patent/JPS60210342A/en
Publication of JPS60210342A publication Critical patent/JPS60210342A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0637Accessories therefor
    • B22D11/064Accessories therefor for supplying molten metal

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)

Abstract

PURPOSE:To maintain a uniform flow rate distribution and to cast a thin metallic sheet having good quality without rippled surfaces, etc. by providing a box- shaped gate formed with notches for outflow of a molten metal on one side face between a nozzle and rolls. CONSTITUTION:The space between a pair of the casting rolls 4 is set at a prescribed distance and thereafter the rolls are rotated at a required speed and the molten metal is poured into said space from the nozzle 1. The molten metal 3 received in the gate 2 overflows from notches 7 on both side faces in the form of the broad thin film-like flow along the axial direction of the rolls and flows down toward the surface of the rolls 4. The molten metal 3 in contact with the rolls 4 is immediately cooled and solidified to form shells. The shells move between the rolls and below the same; at the same time, a molten metal pool is formed by the molten metal supplied successively between the shells. The solidified shells are drawn out below the rolls according to the rotating speed of the rolls and a thin billet 6 is thus obtd.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は一対の水平ロール(双ロール)間に溶融金属を
供給して金属薄板を連続的に鋳造する方法であって、特
に双ロール間に広幅均一の薄膜流を供給することが可能
な鋳造方法に関する。
Detailed Description of the Invention (Field of Industrial Application) The present invention is a method for continuously casting a thin metal plate by supplying molten metal between a pair of horizontal rolls (twin rolls), and in particular The present invention relates to a casting method capable of supplying a wide and uniform thin film flow to a caster.

(従来技術) 鋳造する鋳片厚に応じて決まる間隙をもって配置した一
対の水平鋳造ロール間に、タンディシュ底部のノズルか
ら溶融金属(例えば溶鋼、以下単に溶湯とする)を供給
し、冷却した水平ロールを駆動しつつ凝固した薄板鋳片
を下方に引き出して、連続的に金属薄板を鋳造する技術
は公知である。
(Prior art) Molten metal (for example, molten steel, hereinafter simply referred to as molten metal) is supplied from a nozzle at the bottom of the tundish between a pair of horizontal casting rolls arranged with a gap determined according to the thickness of the slab to be cast, and the horizontal rolls are cooled. A technique for continuously casting thin metal plates by pulling out solidified thin plate slabs downward while driving is known.

この方式にて鋳造を行う場合、ロール間に注湯ノズルを
臨設さぜ溶湯を供給するが、注湯ノズルは特開昭57−
9588号公報にも示すように、円形断面をもち溶湯中
へ浸漬するタイプか一般的である。しかしながら、この
ような鋳造法により例えば鋳片幅が1mを超すような広
幅のh片を鋳造しようとする場合、注湯ノズルを鋳片幅
方向(鋳造ロール軸方向)の中心に位置させて注湯させ
ても、ロール軸方向における注湯流の流速分布は不均一
にならざるを得ない。この流速分布の不均一は、鋳片の
表面に流れしわを生成してしまい、鋳片表面性状の劣化
を招き好ましくない。
When casting with this method, a pouring nozzle is installed between the rolls to supply the molten metal, but the pouring nozzle is
As shown in Japanese Patent No. 9588, it is generally of the type that has a circular cross section and is immersed into the molten metal. However, when trying to cast a wide H piece with a slab width of more than 1 m using such a casting method, the pouring nozzle must be positioned at the center of the slab width direction (casting roll axial direction). Even if the molten metal is poured, the flow velocity distribution of the pouring molten metal in the axial direction of the roll inevitably becomes non-uniform. This non-uniform flow velocity distribution is undesirable because it causes flow wrinkles on the surface of the slab, which leads to deterioration of the surface properties of the slab.

このため、上記の点に鑑み出来るだけロール軸方向にそ
った広幅均一流の注湯流を得るため、注湯ノズルの先端
をスリット状に形成することも考えられるが、溶湯の場
合注入流の途切れの心配からスリット幅を狭くできず、
実操業上有効なものとは言えない。また、複数ノズルを
ロール軸方向に並置する方法も考えられるが、設備面の
不利と共に操作面でも全てのノズルから均等に注湯声る
ことは困難で、同様に有効とは言えない。
Therefore, in view of the above points, in order to obtain a wide and uniform pouring flow along the roll axis direction as much as possible, it is possible to form the tip of the pouring nozzle into a slit shape, but in the case of molten metal, the pouring flow is The slit width cannot be narrowed due to concerns about interruptions,
This cannot be said to be effective in actual operation. Alternatively, a method of arranging a plurality of nozzles in parallel in the roll axis direction may be considered, but it is disadvantageous in terms of equipment and in terms of operation, it is difficult to pour molten water evenly from all nozzles, and it cannot be said to be effective as well.

なお、いずれにしろ従来の如く、注湯流を直接ロール間
に流下させることは、鋳片性状にとって好ましいことで
はない。
In any case, it is not preferable for the properties of the slab to flow directly between the rolls as in the conventional method.

(発明の目的) 本発明の目的は、上述した注湯流の広幅化および流速分
布のロール軸方向にわたる均一化、さらには注湯流の薄
膜化が達成でき、その結果流れしわの全く生じない良質
の表面性状を有する広幅鋳片を祠ることか可能な双ロー
ルによる鋳造方法を提供することにある。
(Object of the Invention) The object of the present invention is to achieve the above-mentioned widening of the pouring flow, uniformity of the flow velocity distribution in the roll axis direction, and thinning of the pouring flow, so that no flow wrinkles occur at all. It is an object of the present invention to provide a casting method using twin rolls capable of casting wide slabs having good surface quality.

(発明の構成) 上記目的を奏するための本発明の構成は、一対の水平鋳
造ロール間に、注入ノズルを臨ませて溶融金属を供給し
、連続的に金属薄板を得る鋳造方法において、前記ノズ
ルとロールの間に、少なくとも一側面に溶融金属の流出
する切欠きを形成した箱形せきを設け、ノズルからの溶
融金属を前記せきにて−たん滞留し、該せきの切欠きか
らロール面へ広幅中薄膜の溶融金属流を流下ゼしめて鋳
造を行なうことを特徴とする。
(Structure of the Invention) The structure of the present invention for achieving the above object is a casting method in which a pouring nozzle is faced between a pair of horizontal casting rolls to supply molten metal to continuously obtain a thin metal sheet. A box-shaped weir having a notch formed on at least one side through which molten metal flows out is provided between the roll and the roll, and the molten metal from the nozzle is retained in the weir and flows from the notch of the weir to the roll surface. It is characterized by casting by flowing down a wide medium-thin molten metal flow.

本発明では、このように注湯ノズルから溶湯を直接鋳造
ロール間に注入することなく、一旦箱形せきにて受けて
から、そこより溢流させるようにしてロール面に流下さ
せているので、注湯流の広幅化および薄膜流化が容易に
達成できると同時に、注湯流の流速分布についてもロー
ル軸方向において均一にすることも可能となる。
In the present invention, the molten metal is not directly injected between the casting rolls from the pouring nozzle as described above, but is first received by the box-shaped weir and then allowed to overflow from there and flow down onto the roll surface. It is possible to easily achieve a wide pouring flow and a thin film flow, and at the same time, it is also possible to make the flow velocity distribution of the pouring flow uniform in the roll axis direction.

(実施例) 以下本発明の詳細を図面にしたがって説明する。第1図
は本発明方法を実施するための双ロール連続鋳造設備の
概略図で、第2図はその正面図、第3図は側面図である
(Example) The details of the present invention will be explained below with reference to the drawings. FIG. 1 is a schematic diagram of a twin-roll continuous casting facility for carrying out the method of the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a side view thereof.

図面に示すように、一対の水平鋳造ロール4は、矢印方
向に夫々設定速度で回転駆動されると共に、適宜の水冷
機構(図示せず)によって冷却されている。これら鋳造
ロール4のロール側面には、溶湯のオーバーフローを防
止するためのサイドダム5を設けている。また、一対の
鋳造ロール4間に溶湯を供給するための注湯ノズルlは
、中間容器(タンディシュ)底部からロール間に向って
延びているが、該ノズルlの先端と鋳造ロール4の間に
は1箱形せき2が配置されている。なお、6はロール4
の下方に引き出されてくる鋳片である。
As shown in the drawing, a pair of horizontal casting rolls 4 are rotated in the directions of the arrows at set speeds, and are cooled by a suitable water cooling mechanism (not shown). Side dams 5 are provided on the side surfaces of these casting rolls 4 to prevent overflow of the molten metal. Further, a pouring nozzle l for supplying molten metal between a pair of casting rolls 4 extends from the bottom of the intermediate container (tundish) toward between the rolls; 1 box-shaped weir 2 is arranged. In addition, 6 is roll 4
This is the slab that is pulled out below.

前記せき2は、注湯ノズルlからの溶湯を直接鋳造ロー
ル4間に供給せずに、−たん受けて滞留させてからロー
ル面へ最適の状態で浴出流下せしめるためのもので、例
えばその形状は、ロール間に若干入り込んだテーバ状の
底部と、はぼ鋳造ロール4の胴長にほぼ等しい長さの耐
火物製の、ヒ部開放の四角形枠体を有し、かつロール軸
方向にそった両側面に四角状の切欠き7を形成してなる
。したがって、ノズルlからせき2内に供給された溶湯
3は、切欠き7からこの切欠き幅に応した幅の薄膜流と
なって溢流することになる。なお、第2図からもわかる
ように、注湯ノズル1の先端はせき2内に深く設置され
、注湯中は溶湯に授漬される。
The weir 2 is for receiving and retaining the molten metal from the pouring nozzle 1 without directly supplying it between the casting rolls 4, and then allowing the molten metal to flow out onto the roll surface in an optimal condition. The shape has a tapered bottom part slightly inserted between the rolls, a rectangular frame body made of refractory material with a length almost equal to the body length of the casting roll 4, and has an open corner. A rectangular notch 7 is formed on both of the curved sides. Therefore, the molten metal 3 supplied into the weir 2 from the nozzle 1 overflows from the notch 7 as a thin film flow having a width corresponding to the width of the notch. As can be seen from FIG. 2, the tip of the pouring nozzle 1 is installed deep within the weir 2, and is immersed in the molten metal during pouring.

鋳造に際しては、一対の鋳造ロール4の間隔を所定距離
に設定して後、所要速度にて回転させてから、ノズルエ
から設定量の溶湯を注湯する。ノズルからの注湯が続く
と、せき2内に受容された溶湯3は、せき両側面の切欠
き7からロール軸方向にそった広幅のかつ薄膜状の流れ
となって浴出するが、この浴出流は第2図に示すように
鋳造ロール4の面に向って流下する。ロール4に接した
溶湯3は直ちに冷却されて凝固してシェルを形成するが
、一対のロール4は矢印方向に回転しているので、シェ
ルはロール間およびその下方へ移行すると共に、シェル
間には順次供給されてくる溶湯によって溶湯溜りが形成
される。凝固したシェルは、ロール下方にロール回転速
度にしたがって引き出され、薄板鋳片6が得られる。
During casting, the pair of casting rolls 4 are set at a predetermined distance, rotated at a required speed, and then a set amount of molten metal is poured from the nozzle. As the pouring from the nozzle continues, the molten metal 3 received in the weir 2 flows out from the notches 7 on both sides of the weir in the form of a wide and thin film flow along the roll axis direction. The bath flow flows down toward the surface of the casting roll 4, as shown in FIG. The molten metal 3 in contact with the rolls 4 is immediately cooled and solidified to form a shell, but since the pair of rolls 4 are rotating in the direction of the arrow, the shell moves between the rolls and below them, and there is a gap between the shells. A molten metal pool is formed by the molten metal that is sequentially supplied. The solidified shell is pulled out below the rolls according to the roll rotation speed, and a thin plate slab 6 is obtained.

このように本発明においては、せき2の切欠き7より溶
湯を溢流させるため、切欠き7の幅に応じた広幅の薄膜
の流れが容易に得られるが、この流れはノズルlからの
直接の流れはなく、−たんせきz内に滞留したのち浴出
するものであるから、その幅全体にわたって流速が一定
であり、したがってロール軸方向における流速分布が均
一となる。
In this way, in the present invention, since the molten metal overflows from the notch 7 of the weir 2, a wide thin film flow corresponding to the width of the notch 7 can be easily obtained, but this flow does not flow directly from the nozzle l. There is no flow, and the fluid stays in the tank z and then comes out, so the flow velocity is constant over the entire width, and therefore the flow velocity distribution in the roll axis direction is uniform.

なお、図示した例においてはせき2の切欠き7形状は四
角形状のものを示したが、側面全幅を切欠いてせきを形
成しても、あるいは台形状等、要するに薄膜流が得られ
るものであればいかなる形状でもよい。また、せき2の
切欠きは図示の例では両側面に形成したが、ロール間隔
が狭い場合のように注入量がそれほど多くないときI;
は、片側面のみに設けてもよい。
In the illustrated example, the shape of the notch 7 of the weir 2 is square, but the weir may be formed by cutting out the entire width of the side surface, or it may be trapezoidal, in other words, anything that can obtain a thin film flow. It can be of any shape. In addition, although the notches of the weir 2 are formed on both sides in the illustrated example, when the injection amount is not so large as in the case where the roll interval is narrow, I;
may be provided only on one side.

(発明の効果) 以上説明したように本発明の鋳造方法によれば、y、ロ
ールへ供給される溶融金属流は広幅・薄膜の流れとなり
、ロール軸方向に流速分布が均一となって流れしわ等が
生ぜず、良質の金属薄板を鋳造することが可能となる。
(Effects of the Invention) As explained above, according to the casting method of the present invention, the molten metal flow supplied to the rolls becomes a wide and thin film flow, and the flow velocity distribution becomes uniform in the roll axis direction, resulting in flow wrinkles. etc., and it becomes possible to cast high-quality thin metal sheets.

また、直接ロール間に溶融金属流が流下しないので、得
られた鋳片性状も良好である。
Furthermore, since the molten metal flow does not flow directly between the rolls, the properties of the obtained slab are also good.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明の鋳造方法を説明するための双ロールに
よる鋳造設備の一例を示す概略図、第2図は第1図の設
備の正面図、第3図は第1図の側面図である。 1・・・&!漬ノズル、2・・・箱形せき、3・・・溶
融金属。 4・・・水上鋳造ロール、5・・・サイドダム、6・・
・鋳片、7・・・せきの切欠き。 特許出願人 代理人 弁理士 矢 葺 知 之 (ほか1名) 笥 1図 毒 第2N
Fig. 1 is a schematic diagram showing an example of casting equipment using twin rolls for explaining the casting method of the present invention, Fig. 2 is a front view of the equipment shown in Fig. 1, and Fig. 3 is a side view of the equipment shown in Fig. 1. be. 1...&! Soaked nozzle, 2... Box-shaped weir, 3... Molten metal. 4...Floating casting roll, 5...Side dam, 6...
- Slab, 7...Notch of weir. Patent Applicant Representative Patent Attorney Tomoyuki Yafuki (and 1 other person) Scroll 1 Figure 2N

Claims (1)

【特許請求の範囲】[Claims] 一対の水平鋳造ロール間に、注入ノズルを臨ませて溶融
金属を供給し、連続的に金属薄板を得る鋳造方法におい
て、前記ノズルとロールの間に、少なくとも一側面に溶
融金属の流出する切欠きを形成した箱形せきを設け、ノ
ズルからの溶融金属を前記せきにて−たん滞留し、該せ
きの切欠きからロール面へ広幅・薄膜の溶融金属流を流
下せしめて鋳造を行なうことを特徴とする双ロールによ
る金属薄板の鋳造方法。
In a casting method for continuously obtaining a thin metal plate by supplying molten metal between a pair of horizontal casting rolls by facing an injection nozzle, there is a notch between the nozzle and the rolls through which the molten metal flows out on at least one side. Casting is carried out by providing a box-shaped weir with a shape formed therein, allowing the molten metal from the nozzle to stagnate in the weir, and causing a wide, thin film of molten metal flow to flow down from the notch in the weir to the roll surface. A method for casting thin metal sheets using twin rolls.
JP6327984A 1984-04-02 1984-04-02 Casting method of thin metallic sheet by twin rolls Pending JPS60210342A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6327984A JPS60210342A (en) 1984-04-02 1984-04-02 Casting method of thin metallic sheet by twin rolls

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6327984A JPS60210342A (en) 1984-04-02 1984-04-02 Casting method of thin metallic sheet by twin rolls

Publications (1)

Publication Number Publication Date
JPS60210342A true JPS60210342A (en) 1985-10-22

Family

ID=13224719

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6327984A Pending JPS60210342A (en) 1984-04-02 1984-04-02 Casting method of thin metallic sheet by twin rolls

Country Status (1)

Country Link
JP (1) JPS60210342A (en)

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