JPH09295106A - Method for continuously casting thin cast slab - Google Patents
Method for continuously casting thin cast slabInfo
- Publication number
- JPH09295106A JPH09295106A JP3175897A JP3175897A JPH09295106A JP H09295106 A JPH09295106 A JP H09295106A JP 3175897 A JP3175897 A JP 3175897A JP 3175897 A JP3175897 A JP 3175897A JP H09295106 A JPH09295106 A JP H09295106A
- Authority
- JP
- Japan
- Prior art keywords
- lubricant
- solid lubricant
- drum
- continuous casting
- thin cast
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は一対の冷却ドラムを
配設した連続鋳造機により薄肉鋳片を連続的に鋳造する
際に、冷却ドラム端面とサイド堰との間を効率的に潤滑
することのできる連続鋳造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides efficient lubrication between the end face of a cooling drum and a side weir when a thin cast piece is continuously cast by a continuous casting machine having a pair of cooling drums. The present invention relates to a continuous casting method capable of performing.
【０００２】[0002]
【従来の技術】最近、溶鋼等の溶融金属から最終形状に
近い数mm程度の厚みをもつ薄肉鋳片を直接的に製造する
方法が注目されている。この連続鋳造方法によるときに
は、従来のような多段階にわたる熱延工程を必要とせ
ず、また最終形状にする圧延も軽度なもので済むため、
工程及び設備の簡略化を図ることができる。2. Description of the Related Art Recently, attention has been focused on a method for directly producing a thin cast piece having a thickness of about several mm close to a final shape from a molten metal such as molten steel. When this continuous casting method is used, the conventional multi-step hot rolling process is not required, and the rolling to the final shape can be done lightly.
The process and equipment can be simplified.
【０００３】このような目的で開発されている連続鋳造
方法の一つに、双ドラム法がある（特開昭６０−１３７
５６２号公報参照）。図４は、この双ドラム法の概略を
説明するための斜視図である。すなわち、この方式にお
いては、互いに逆方向に回転する一対の冷却ドラム１
ａ、１ｂを水平に配置し、冷却ドラム１ａ、１ｂ及びサ
イド堰２ａ、２ｂにより画成された凹部に湯溜まり部３
を形成する。溶融金属は、タンディッシュ等の容器から
注湯ノズルを介してこの湯溜まり部３に注湯され、この
湯溜まり部３の溶融金属４は、冷却ドラム１ａ、１ｂと
接する部分が冷却・凝固して凝固シェルとなる。One of the continuous casting methods developed for this purpose is the twin drum method (Japanese Patent Laid-Open No. 60-137).
562). FIG. 4 is a perspective view for explaining the outline of the twin drum method. That is, in this method, the pair of cooling drums 1 rotating in opposite directions to each other.
a and 1b are arranged horizontally, and the hot water pool 3 is provided in the recess defined by the cooling drums 1a and 1b and the side dams 2a and 2b.
To form Molten metal is poured from a container such as a tundish into the pool 3 through a pouring nozzle, and the molten metal 4 in the pool 3 is cooled and solidified at the portions in contact with the cooling drums 1a and 1b. Becomes a solidified shell.
【０００４】この凝固シェルは、冷却ドラム１ａ、１ｂ
の回転に随伴して移動し、一対の冷却ドラム１ａ、１ｂ
が互いに最も接近する位置、いわゆるドラムギャップ部
６で、それぞれの冷却ドラム１ａ、１ｂの表面で形成さ
れた凝固シェルが互いに圧着し、目的とする薄肉鋳片５
となる。ここで１５は冷却ドラム端面、１６は摺動面で
ある。This solidified shell is composed of cooling drums 1a and 1b.
Of the cooling drum 1a, 1b
At the positions where they are closest to each other, the so-called drum gap portion 6, the solidified shells formed on the surfaces of the respective cooling drums 1a and 1b are pressure-bonded to each other, and the target thin cast piece 5 is formed.
Becomes Here, 15 is an end surface of the cooling drum, and 16 is a sliding surface.
【０００５】かかる薄板連続鋳造機において、サイド堰
２ａ、２ｂは、実開昭６３−９０５４８号公報にも示さ
れているように、サイド堰ケースに収納された断熱材
と、該断熱材に植設されたベース部材と、該ベース部材
の冷却ドラムに対応する部分に植設されたセラミックプ
レートとにより構成されている。この構成により、鋳造
時には、サイド堰を冷却ドラム端面に押し付け、セラミ
ックプレートを冷却ドラム端面との間で摩耗させること
によって隙間をなくし、溶鋼もれを防止している。ま
た、サイド堰には、特開昭６１−２６６１６０号公報に
も見られるように、一般に振動が付与されており、これ
がセラミックプレートの摩耗を助長している。In such a thin plate continuous casting machine, the side weirs 2a and 2b are heat-insulated in a side weir case and planted in the heat-insulated material, as disclosed in Japanese Utility Model Laid-Open No. 63-90548. It is composed of a base member provided and a ceramic plate implanted in a portion of the base member corresponding to the cooling drum. With this configuration, during casting, the side dam is pressed against the end surface of the cooling drum, and the ceramic plate is worn against the end surface of the cooling drum to eliminate a gap and prevent molten steel leakage. Further, as seen in Japanese Patent Laid-Open No. 61-266160, vibration is generally applied to the side weir, which promotes wear of the ceramic plate.
【０００６】このような薄板連続鋳造機において、鋳造
量は、冷却ドラム端面との摺動によるサイド堰セラミッ
クプレートの摩耗速度によって決まる。従って、セラミ
ックプレートの摩耗を抑制することが鋳造量の増大を図
る上で極めて重要である。このセラミックプレートの摩
耗は、その硬度、表面温度、粗度などの因子によって影
響される。そこで、セラミックプレートの摩耗を抑制す
るため、冷却ドラム端面に摺接するセラミックプレート
の摩耗面に潤滑剤を供給することが行なわれている。こ
れにより、潤滑剤が摩耗面に介在して摩耗を抑制すると
ともに、さらに、セラミックプレートの表面温度を低下
させ、冷却ドラム端面の荒れを防止することができるの
で、前記冷却ドラム摺動面とセラミックプレート摩耗面
との間の摩擦係数の低減につながり、結果的にサイド堰
の開放が防止されて、溶鋼のシール性向上が実現する。In such a thin plate continuous casting machine, the casting amount is determined by the rate of wear of the side dam ceramic plate due to sliding with the end surface of the cooling drum. Therefore, it is extremely important to suppress the wear of the ceramic plate in order to increase the casting amount. The wear of the ceramic plate is affected by factors such as its hardness, surface temperature and roughness. Therefore, in order to suppress wear of the ceramic plate, a lubricant is supplied to the wear surface of the ceramic plate that is in sliding contact with the end surface of the cooling drum. As a result, the lubricant intervenes on the wear surface to suppress wear, and further, the surface temperature of the ceramic plate can be lowered to prevent the end surface of the cooling drum from being roughened. This leads to a reduction in the coefficient of friction with the plate wear surface, and as a result, the side weir is prevented from opening and the sealing property of molten steel is improved.
【０００７】このように、セラミックプレートの摩耗面
に潤滑剤を供給する手段としては、特開昭６３−２４８
５４７号公報に固体潤滑剤を冷却ドラム端面あるいはサ
イド堰セラミックプレート摩耗面にエアーシリンダーで
押し付ける、あるいは固体潤滑剤の微小粉末を液体に分
散させたものを噴霧して付着させる方法が提案されてい
る。As described above, as means for supplying the lubricant to the worn surface of the ceramic plate, there is disclosed in Japanese Patent Laid-Open No. 63-248.
Japanese Patent No. 547 proposes a method in which a solid lubricant is pressed against an end surface of a cooling drum or a wear surface of a side dam ceramic plate with an air cylinder, or a method in which fine powder of solid lubricant is dispersed in a liquid to be sprayed and attached thereto. .
【０００８】[0008]
【発明が解決しようとする課題】しかしながら、特開昭
６３−２４８５４７号公報のように、通常のサイド堰を
用い、固体潤滑剤を単純に付着させた場合に、摺動面に
十分な潤滑効果が得られるとは限らない。すなわち、冷
却ドラム端面の潤滑剤付着量が少ない場合や、付着量が
十分であっても、図２（ａ）に矢印で示した冷却ドラム
端面と摺接するサイド堰セラミックプレートのドラム回
転方向入り側部分１１で潤滑剤が掻き取られるような場
合には、十分な潤滑効果は得られない。一方、冷却ドラ
ム端面の固体潤滑剤付着量が多過ぎると、溶鋼プール中
にサイド堰セラミックプレートとの摺動面から滲み出し
た潤滑剤が入り込むことによって溶鋼を汚染し、これを
防止しようとして、冷却ドラム端面とサイド堰セラミッ
クプレートとの間のギャップを大きくすると、湯が差し
やすくなるといった不具合を生じる場合が多い。However, as in Japanese Patent Laid-Open No. 63-248547, when a normal side dam is used and a solid lubricant is simply attached, a sufficient lubricating effect is obtained on the sliding surface. Is not always obtained. That is, when the amount of lubricant adhered to the end face of the cooling drum is small, or even if the amount of adhered lubricant is sufficient, the side dam ceramic plate that slides in contact with the end face of the cooling drum indicated by the arrow in FIG. When the lubricant is scraped off at the portion 11, a sufficient lubricating effect cannot be obtained. On the other hand, if the amount of solid lubricant deposited on the end surface of the cooling drum is too large, the lubricant that has exuded from the sliding surface of the side dam ceramic plate into the molten steel pool will contaminate the molten steel and attempt to prevent it. Increasing the gap between the end surface of the cooling drum and the side dam ceramic plate often causes problems such as easier pouring of hot water.
【０００９】本発明はこのような問題点を解決して、良
好な潤滑機能を発揮して長時間の安定した連続鋳造を可
能にならしめる連続鋳造方法を提供することを目的とす
るものである。It is an object of the present invention to solve the above problems and provide a continuous casting method capable of exhibiting a good lubricating function and enabling stable continuous casting for a long time. .
【００１０】[0010]
【課題を解決するための手段】この目的を達成するた
め、本発明は、以下の点を要旨とする。 （１）一対の冷却ドラムと一対のサイド堰との間に形成
した湯溜まり部に溶融金属を注入し、該溶融金属を前記
冷却ドラムの回転周面で冷却、凝固させながら薄肉鋳片
を製造する薄肉鋳片の連続鋳造方法において、冷却ドラ
ム端面と摺接するセラミックプレートのドラム回転方向
入り側部分が面取りされたサイド堰を用い、該サイド堰
のドラム回転方向入り側の上流位置の冷却ドラム端面
に、固体潤滑剤を押し付けて連続的に供給することを特
徴とする薄肉鋳片の連続鋳造方法。 （２）前記固体潤滑剤を面圧２〜１５kgf/cm2 で冷却ド
ラム端面に押し付けることを特徴とする上記（１）記載
の薄肉鋳片の連続鋳造方法。 （３）前記固体潤滑剤を押し込み速度０．１〜１０mm/m
inで冷却ドラムの端面に押し付けることを特徴とする上
記（１）記載の薄肉鋳片の連続鋳造方法。 （４）前記固体潤滑剤が、気孔率２〜６０％の気孔を有
し、該気孔中に使用温度域で液体の潤滑剤が含浸された
成形体であることを特徴とする上記（１）ないし（３）
のいずれか１つに記載の薄肉鋳片の連続鋳造方法。 （５）前記固体潤滑剤が、棒状成形体をなし、該成形体
の長手方向に１または２以上の貫通孔を有し、該貫通孔
中に使用温度域で液体の潤滑剤が埋設されていることを
特徴とする上記（１）ないし（３）のいずれか１つに記
載の薄肉鋳片の連続鋳造方法。In order to achieve this object, the present invention has the following points. (1) A molten metal is poured into a molten metal pool formed between a pair of cooling drums and a pair of side dams, and the molten metal is cooled and solidified on the rotating peripheral surface of the cooling drum to manufacture a thin cast piece. In the continuous casting method for thin cast slabs, the side wall of the ceramic plate, which is in sliding contact with the end surface of the cooling drum, is chamfered, and the end surface of the side drum is located upstream of the side surface of the cooling drum. A continuous casting method for thin-walled cast slabs, characterized in that a solid lubricant is pressed against and continuously supplied. (2) The method for continuously casting thin cast pieces as described in (1) above, wherein the solid lubricant is pressed against the end surface of the cooling drum at a surface pressure of 2 to 15 kgf / cm 2 . (3) Pushing speed of the solid lubricant 0.1 to 10 mm / m
The method for continuous casting of thin-walled slabs according to (1) above, wherein the in-pressing is performed on the end surface of the cooling drum. (4) The solid lubricant is a molded product having pores with a porosity of 2 to 60%, and the pores are impregnated with a liquid lubricant in a temperature range for use. Through (3)
A method for continuously casting a thin cast piece according to any one of 1. (5) The solid lubricant forms a rod-shaped molded body, has one or two or more through holes in the longitudinal direction of the molded body, and the liquid lubricant is embedded in the through holes in the operating temperature range. The method for continuously casting a thin cast slab according to any one of (1) to (3) above.
【００１１】本発明は、固体潤滑剤が冷却ドラム端面と
サイド堰セラミックプレートの摺動面に容易に取り込ま
れる構造としたサイド堰を用い、固体潤滑剤を適正な面
圧または押し込み速度でもってドラム端面に押し付けな
がら供給するものである。従って、本発明を実施すれ
ば、潤滑剤の供給不足により潤滑不十分となったり、供
給過剰により溶鋼汚染や湯差しが生じたりするのを防止
して、固体潤滑剤を無駄なく、使用することが可能にな
るとともに、得られる潤滑効果によって長時間にわたり
安定した鋳造を実現することができる。The present invention uses a side dam having a structure in which the solid lubricant is easily taken into the end surface of the cooling drum and the sliding surface of the side dam ceramic plate, and the solid lubricant is applied to the drum at an appropriate surface pressure or pushing speed. It is supplied while being pressed against the end face. Therefore, when the present invention is carried out, it is possible to prevent insufficient lubrication due to insufficient supply of lubricant, and prevent contamination of molten steel or jug due to excessive supply, and to use solid lubricant without waste. In addition, it is possible to achieve stable casting for a long time by the obtained lubrication effect.
【００１２】また、上記（５）記載の潤滑剤を用いれ
ば、潤滑剤の付着効率が飛躍的に向上するので、付着性
に劣る固体潤滑剤の使用も可能となるだけでなく、潤滑
効果の安定性が向上して、潤滑効果発現に必要な潤滑剤
供給量をより少量とすることができる。Further, when the lubricant described in the above (5) is used, the adhesion efficiency of the lubricant is remarkably improved, so that not only the solid lubricant having poor adhesion can be used, but also the lubricating effect can be improved. The stability is improved, and the lubricant supply amount required for exhibiting the lubrication effect can be reduced.
【００１３】[0013]
【発明の実施の形態】以下本発明を、図面を参照しなが
ら詳細に説明する。まず、本発明で用いるサイド堰を図
１及び図２により説明する。図１のサイド堰２ａにおい
て、外側はサイド堰ケース７で覆われ、冷却ドラム１ｂ
の端面１５に向かい合った内側は、サイド堰ケース７に
納められた断熱材８、ベース部材９、そしてその上に植
設されたセラミックプレート１０の順で構成されてい
る。セラミックプレート１０は冷却ドラム端面１５の摺
動面１６と直接摺り合う摩耗面２０に沿って設けられて
おり、本発明では、図２（ｂ）、（ｃ）に示すように、
セラミックプレート１０のドラム回転方向入り側部分１
１は平面あるいは曲面で面取りしてある。なお、図２
（ａ）は、従来の面取りしていないセラミックプレート
１０を示している。BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described in detail with reference to the drawings. First, the side weir used in the present invention will be described with reference to FIGS. In the side weir 2a of FIG. 1, the outside is covered with a side weir case 7, and the cooling drum 1b
The inner side facing the end surface 15 is composed of a heat insulating material 8 housed in the side dam case 7, a base member 9, and a ceramic plate 10 planted thereon. The ceramic plate 10 is provided along the wear surface 20 that directly slides on the sliding surface 16 of the cooling drum end surface 15, and in the present invention, as shown in FIGS. 2 (b) and 2 (c),
Part 1 of the ceramic plate 10 on the drum rotation direction entering side
Reference numeral 1 is a flat surface or a curved surface. Note that FIG.
(A) shows a conventional ceramic plate 10 without chamfering.
【００１４】また、本発明で用いる固体潤滑剤押し付け
装置の一例を、図３に示す。すなわち、シリンダー１７
ａ、１７ｂによって潤滑剤１４ａ、１４ｂを所定の面圧
で冷却ドラム端面の摺動面１６に押し付ける構造となっ
ている。この押し付け装置は、固体潤滑剤を所定の面圧
で冷却ドラム摺動面１６に押し付けることができるよう
な構造であればよく、シリンダー１７ａ、１７ｂの代わ
りに伸長スプリングなどを用いることもできる。また、
シリンダー１７ａ，１７ｂの代わりに、潤滑剤の供給速
度を所定の供給速度に制御できる押し込み速度可変装置
を用いることもできる。An example of the solid lubricant pressing device used in the present invention is shown in FIG. That is, the cylinder 17
The structure in which the lubricants 14a and 14b are pressed against the sliding surface 16 at the end surface of the cooling drum by a and 17b with a predetermined surface pressure. The pressing device may have a structure that can press the solid lubricant against the cooling drum sliding surface 16 with a predetermined surface pressure, and an extension spring or the like can be used instead of the cylinders 17a and 17b. Also,
Instead of the cylinders 17a and 17b, it is possible to use a pushing speed varying device capable of controlling the supply speed of the lubricant to a predetermined supply speed.
【００１５】以下、本発明の原理を図を用いて説明す
る。図５は、固体潤滑剤ＢＮの押し付け面圧と、潤滑効
果の指標として最も重要なサイド堰のセラミックプレー
ト摩耗速度との関係を、サイド堰セラミックプレートの
ドラム回転方向入り側部分を平面あるいは曲面に面取り
した場合（加工あり）と面取りしない場合（加工なし）
に分けて示した図である。なお、面取りが平面であるか
曲面であるかの違いによる差はほとんどなく、従って、
両者を１本のグラフにまとめて示した。The principle of the present invention will be described below with reference to the drawings. FIG. 5 shows the relationship between the pressing surface pressure of the solid lubricant BN and the wear rate of the ceramic plate of the side dam, which is the most important index of the lubrication effect. When chamfered (with processing) and when not chamfered (without processing)
It is the figure divided and shown. It should be noted that there is almost no difference due to whether the chamfer is a flat surface or a curved surface, and therefore,
Both are shown together in one graph.
【００１６】サイド堰セラミックプレートのドラム回転
方向入り側部分を平面あるいは曲面に面取りした場合に
は、固体潤滑剤が冷却ドラム摺動面とセラミックプレー
ト摩耗面との間に良好に供給される。それに対して、面
取りしない場合には、セラミックプレートのドラム回転
方向入り側部分で潤滑剤が掻き取られて、摺動面にうま
く供給できないため、押し付け面圧を大きくすることに
より、冷却ドラム摺動面への潤滑剤の固着を強くして潤
滑効果を発現させる必要がある。When the portion of the side dam ceramic plate on the drum rotation direction side is chamfered into a flat surface or a curved surface, the solid lubricant is satisfactorily supplied between the sliding surface of the cooling drum and the worn surface of the ceramic plate. On the other hand, when chamfering is not performed, the lubricant is scraped off on the side of the ceramic plate that enters the drum rotation direction and cannot be properly supplied to the sliding surface.Therefore, by increasing the pressing surface pressure, the cooling drum slides. It is necessary to strengthen the adhesion of the lubricant to the surface and to develop the lubricating effect.
【００１７】一方、固体潤滑剤の物性によって絶対値は
多少異なるが、潤滑剤の押し付け面圧が小さくて、２kg
f/cm2 を割った場合は、ドラム摺動面に対する潤滑剤付
着量が少なく、従って、目的とする冷却ドラム摺動面と
セラミックプレート摩耗面との間への潤滑剤の供給量が
不足して、結果的に潤滑効果は発現しない。On the other hand, although the absolute value is slightly different depending on the physical properties of the solid lubricant, the pressing pressure of the lubricant is small and it is 2 kg.
When f / cm 2 is divided, the amount of lubricant adhered to the drum sliding surface is small, so the amount of lubricant supplied between the intended cooling drum sliding surface and the ceramic plate wear surface is insufficient. As a result, the lubrication effect does not appear.
【００１８】図６は、固体潤滑剤ＢＮの押し付け面圧と
潤滑剤消費指数、ドラム摺動面への潤滑剤付着指数、潤
滑剤に起因する鋳片欠陥発生指数、及び湯差し発生指数
との関係を示したものである。なお、ここでいう潤滑剤
消費指数、潤滑剤付着指数は、押し付け面圧２０kgf/cm
2 時の潤滑剤消費量を１とした場合の相対値であり、鋳
片欠陥発生指数、湯差し発生指数は、全試験数を１とし
た場合の相対発生頻度である。FIG. 6 shows the pressing surface pressure of the solid lubricant BN, the lubricant consumption index, the lubricant adhesion index on the sliding surface of the drum, the cast slab defect generation index due to the lubricant, and the slag generation index. It shows the relationship. The lubricant consumption index and lubricant adhesion index here are the pressing surface pressure of 20 kgf / cm.
It is a relative value when the lubricant consumption amount at 2 o'clock is 1, and the slab defect occurrence index and the slag generation index are relative occurrence frequencies when the total number of tests is 1.
【００１９】固体潤滑剤消費量は、押し付け面圧の増加
に伴って大きくなる。一方、潤滑剤消費量のうち、ドラ
ム摺動面への付着量を見てみると、潤滑剤押し付け面圧
が１５kgf/cm2 までは面圧の増加に比例して付着量も増
えていく。しかし、その押し付け面圧に達すると、付着
量はほぼ飽和して、それ以上増加しなくなる。すなわ
ち、潤滑効果発現に必要なドラム摺動面への潤滑剤付着
量は、一定の押し付け面圧以下で十分であり、それを超
えて面圧を上げても潤滑効果には寄与せず、潤滑コスト
をアップさせるだけとなる。The solid lubricant consumption increases as the pressing surface pressure increases. On the other hand, looking at the amount of adhesion to the sliding surface of the drum out of the amount of lubricant consumption, the amount of adhesion increases in proportion to the increase in surface pressure up to a lubricant pressing surface pressure of 15 kgf / cm 2 . However, when the pressing surface pressure is reached, the adhered amount is almost saturated and does not increase any more. That is, the amount of lubricant adhered to the sliding surface of the drum required to develop the lubrication effect is sufficient if it is below a certain pressing surface pressure, and even if the surface pressure is increased beyond that, it does not contribute to the lubrication effect. It only increases the cost.
【００２０】さらに、押し付け面圧を大きくして潤滑剤
消費量を増やしていくと、ドラム端面とセラミックプレ
ートの摺動部から溶鋼プール内に滲み出していく潤滑剤
の量が増加する。そして、この滲み出した潤滑剤が鋳片
に巻き込まれ、図６のように、鋳片欠陥の発生が急増す
る原因となる。また、ドラム摺動面への付着量が増えれ
ば、付着厚みも増加することになり、ドラム端面とセラ
ミックプレート間のギャップは大きくなる。その結果、
図６のように、ドラム端面とセラミックプレート間への
湯差しを盛んに誘発して、操業トラブルを引き起こす原
因ともなる。Further, when the pressing surface pressure is increased to increase the lubricant consumption amount, the amount of the lubricant exuding from the sliding portion between the drum end surface and the ceramic plate into the molten steel pool increases. Then, this lubricant that has exuded is caught in the slab, which causes the slab defects to rapidly increase as shown in FIG. Further, if the amount of adhesion to the drum sliding surface increases, the adhesion thickness also increases, and the gap between the drum end surface and the ceramic plate increases. as a result,
As shown in FIG. 6, hot water may be actively induced between the end surface of the drum and the ceramic plate to cause a trouble in operation.
【００２１】固体潤滑剤によっては、成形体としての強
度が低く押し付け面圧制御では、潤滑剤の安定供給がで
きない場合があるため、このような場合には、０．１〜
１０mm/minの範囲で押し込み速度制御により、固体潤滑
剤を供給することができる。しかし、押し込み速度が
０．１mm/min未満では、ドラム摺動面に対する潤滑剤付
着量が少なく、目的とする冷却ドラム摺動面とセラミッ
クプレート摩耗面との間への潤滑剤の供給量が不足し
て、結果的に潤滑効果が得られないため、押し込み速度
の下限は０．１mm/minとする。一方、押し込み速度を１
０mm/minを越えて大きくしても、ドラム摺動面への潤滑
剤付着量は飽和して、潤滑効果には寄与せず、潤滑コス
トをアップさせるだけでなく、溶鋼プール内に滲み出し
ていく潤滑剤の量が増加して、鋳片欠陥を増加させるこ
ととなるため、押し込み速度の上限は１０mm/minとす
る。Depending on the solid lubricant, the strength as a molded body is low, and there is a case where stable supply of the lubricant cannot be achieved by controlling the pressing surface pressure.
The solid lubricant can be supplied by controlling the pushing speed in the range of 10 mm / min. However, if the pushing speed is less than 0.1 mm / min, the amount of lubricant adhered to the drum sliding surface is small, and the amount of lubricant supplied between the target cooling drum sliding surface and the ceramic plate wear surface is insufficient. Then, the lubricating effect cannot be obtained as a result, so the lower limit of the pushing speed is set to 0.1 mm / min. On the other hand, the pushing speed is 1
Even if it exceeds 0 mm / min, the amount of lubricant adhering to the drum sliding surface is saturated, does not contribute to the lubrication effect, not only increases the lubrication cost, but also exudes in the molten steel pool. The upper limit of the indentation speed is set to 10 mm / min because the amount of the lubricant to be increased increases the slab defects.
【００２２】一方、ＢＮ成形体（焼結体）の気孔に使用
温度域で液体の潤滑剤を含浸させた固体潤滑剤（図１
０）や、棒状ＢＮ成形体（焼結体）の長手方向に設けた
貫通孔に使用温度域で液体の潤滑剤を埋設させた固体潤
滑剤（図１１）を使用することによって、ＢＮ単体時以
上に、ドラム摺動面へのＢＮの付着効率を高めれば（図
１２）、同一押し付け面圧時における潤滑効果はさらに
向上し、潤滑剤の使用量減によるさらなるコスト低減が
可能となる。On the other hand, the solid lubricant obtained by impregnating the pores of the BN compact (sintered body) with the liquid lubricant in the operating temperature range (see FIG. 1).
0) and a solid lubricant (Fig. 11) in which a liquid lubricant is embedded in the through-hole provided in the longitudinal direction of the rod-shaped BN compact (sintered body) in the operating temperature range. As described above, if the efficiency of BN adhesion to the drum sliding surface is increased (FIG. 12), the lubricating effect at the same pressing surface pressure is further improved, and the cost can be further reduced by reducing the amount of lubricant used.
【００２３】なお、含浸させる潤滑剤によって固体潤滑
剤の付着効率を高めるためには、成形体の気孔率は少な
くとも２％は必要であり、成形体としての剛性維持の観
点からは、６０％以下であることが好ましい。The porosity of the molded body must be at least 2% in order to increase the adhesion efficiency of the solid lubricant by the impregnated lubricant. From the viewpoint of maintaining the rigidity of the molded body, it is 60% or less. Is preferred.
【００２４】また、固体潤滑剤成形体の材質としては、
ＢＮ以外でも、黒鉛、雲母、二流化タングステン、二流
化モリブデン、タルク、ＣａＣＯ3 といった自己潤滑性
を有するものであればよい。As the material of the solid lubricant compact,
Other than BN, any material having self-lubricating properties such as graphite, mica, tungsten disulfide, molybdenum disulfide, talc, and CaCO 3 may be used.
【００２５】含浸物質・埋設物質には、使用温度域にあ
わせて、潤滑油、グリース、ワックス（ろう）、融点６
００℃以下の低融点ガラスといった使用温度域で液体と
なる潤滑剤を適宜選べばよい。As the impregnating substance and the burying substance, lubricating oil, grease, wax (wax), and melting point 6 are used according to the operating temperature range.
A lubricant which becomes a liquid in the operating temperature range, such as a low melting point glass of 00 ° C. or less, may be appropriately selected.
【００２６】以上述べてきたような理由に基づき、本発
明では、セラミックプレートのドラム回転方向入り側部
分を平面あるいは曲面で面取りしたサイド堰を用い、固
体潤滑剤の押し付け面圧を２kgf/cm2 〜１５kgf/cm2 と
するかまたは押し込み速度を０．１〜１０mm/minとする
ことによって目的とする潤滑効果を得ることができて、
長時間にわたる連続鋳造が可能となる。On the basis of the above-mentioned reasons, in the present invention, the side weir in which the portion of the ceramic plate on the drum rotation direction side is chamfered with a flat surface or a curved surface is used, and the pressing pressure of the solid lubricant is 2 kgf / cm 2. and it is possible to obtain a lubricating effect for the purpose of or push speed is ~15kgf / cm 2 by a 0.1 to 10 mm / min,
It enables continuous casting for a long time.
【００２７】[0027]
【実施例】次に、本発明に基づいて実施した鋳造試験結
果について詳細に述べる。 （実施例１）試験に用いた水冷ドラムの材質はＳＵＳ３
０４、サイド堰のセラミックプレートの材質はＢＮ：５
０％、ＡｌＮ：５０％であり、ドラム回転方向入り側部
分を平面で面取りした。サイド堰の水冷ドラム端面への
押し付け面圧は従来、潤滑なしで３kgf/cm2 としてい
る。なお、摺動速度は８０m/min であり、また、セラミ
ックプレートと水冷ドラム端面の摺動面との接触長さは
４７０mmであった。そこで、かかる装置に、ワックスで
保形した、外周直径１０mmの円筒形状を有する二硫化タ
ングステン固体潤滑剤を用い、水冷ドラム摺動面への押
し付け面圧６kgf/cm2 で強制潤滑を施した。EXAMPLES Next, the results of the casting test conducted according to the present invention will be described in detail. (Example 1) The material of the water cooling drum used in the test is SUS3
04, side weir ceramic plate material is BN: 5
0%, AlN: 50%, and the portion on the side entering the drum rotation direction was chamfered with a flat surface. Conventionally, the surface pressure of the side weir against the end surface of the water cooling drum is 3 kgf / cm 2 without lubrication. The sliding speed was 80 m / min, and the contact length between the ceramic plate and the sliding surface of the water cooling drum end surface was 470 mm. Then, for this apparatus, a tungsten disulfide solid lubricant having a cylindrical shape with an outer peripheral diameter of 10 mm, which was held by wax, was used, and forced lubrication was performed at a pressing surface pressure of 6 kgf / cm 2 against the sliding surface of the water cooling drum.
【００２８】水冷ドラム摺動面とセラミックプレート摩
耗面間の摩擦係数を水冷ドラムの回転トルク値から求
め、図７に示した。固体潤滑剤を用いない場合（潤滑な
し）に比べて、本発明の方が大幅に摩擦係数が減少して
いることがわかる。The friction coefficient between the sliding surface of the water cooling drum and the worn surface of the ceramic plate was determined from the rotational torque value of the water cooling drum and is shown in FIG. It can be seen that the friction coefficient of the present invention is significantly reduced as compared with the case where no solid lubricant is used (no lubrication).
【００２９】図８は冷却ドラム端面の摺動面の摩耗量
を、図９はセラミックプレート摩耗面の摩耗量を、各々
摺動距離１km毎に測定した結果を示す。本発明を実施す
ることによりドラム端面、セラミックプレートともに摺
動面あるいは摩耗面の摩耗量が固体潤滑剤を用いない場
合に比べて著しく減少したことがわかる。これは、本発
明によって、１）潤滑効果の向上、２）表面温度の低
減、３）冷却ドラム摺動面の凹凸低減、を図ることがで
きた結果によるものと思われる。FIG. 8 shows the amount of wear on the sliding surface of the cooling drum end face, and FIG. 9 shows the result of measuring the amount of wear on the ceramic plate wear face for each sliding distance of 1 km. By carrying out the present invention, it can be seen that the wear amount of the sliding surface or the wear surface of the drum end surface and the ceramic plate is remarkably reduced as compared with the case where the solid lubricant is not used. It is considered that this is because the present invention can achieve 1) improvement of lubrication effect, 2) reduction of surface temperature, and 3) reduction of unevenness of the cooling drum sliding surface.
【００３０】（実施例２）次に上記実施例１と同様の装
置、条件において、材質がＢＮの固体潤滑剤を使用した
場合の結果を図７、図８、図９に示す。この場合も実施
例１の二硫化タングステンの場合と同様に、良好な潤滑
効果が得られた。(Embodiment 2) Next, results obtained when a solid lubricant made of BN was used in the same apparatus and conditions as in Embodiment 1 are shown in FIGS. 7, 8 and 9. In this case as well, similar to the case of the tungsten disulfide of Example 1, a good lubricating effect was obtained.
【００３１】（実施例３）固体潤滑剤をＢＮ成形体、潤
滑剤供給装置に押し込み速度可変装置を用い、それ以外
の装置、条件を上記実施例１と同様として、０．５mm/m
in（押し付け面圧６kgf/cm2 相当）の供給速度で固体潤
滑剤を供給した結果を図７、８、９に示す。この場合も
実施例１とほぼ同様の良好な潤滑効果が得られた。(Embodiment 3) A solid lubricant is pushed into a BN compact and a lubricant supply device, and a speed varying device is used. Other devices and conditions are the same as in the above-mentioned embodiment 1, and 0.5 mm / m.
The results of supplying the solid lubricant at a supply speed of in (corresponding to a pressing surface pressure of 6 kgf / cm 2 ) are shown in FIGS. In this case as well, a good lubricating effect similar to that of Example 1 was obtained.
【００３２】（実施例４）上記実施例１と同様の装置、
条件において、気孔率４５％の常圧焼結ＢＮ成形体に菜
種油を真空含浸させた固体潤滑剤を使用した場合の結果
を図７、８、９に示す。この場合には、実施例１、２よ
りもさらに良好な潤滑効果が得られた。(Embodiment 4) An apparatus similar to that of Embodiment 1 above,
7, 8 and 9 show the results when a solid lubricant obtained by vacuum impregnating rapeseed oil into a pressureless sintered BN compact having a porosity of 45% was used under the conditions. In this case, a better lubricating effect than in Examples 1 and 2 was obtained.
【００３３】（実施例５）上記実施例１と同様の装置、
条件において、棒状ホットプレスＢＮ成形体の長手方向
に貫通孔を設け、貫通孔中にステアリン酸系ワックスを
埋設させた固体潤滑剤を使用した場合の結果を図７、
８、９に示す。この場合にも、実施例１、２よりもさら
に良好な潤滑効果が得られた。(Embodiment 5) An apparatus similar to that of Embodiment 1 above,
Under conditions, a through hole is provided in the longitudinal direction of the rod-shaped hot-pressed BN compact, and a solid lubricant in which a stearic acid-based wax is embedded in the through hole is used.
8 and 9. Also in this case, a better lubricating effect than in Examples 1 and 2 was obtained.
【００３４】（比較例１）サイド堰のセラミックプレー
トドラム回転方向入り側部分を、面取りせずにドラム端
面に対して垂直のままとし、他の条件については実施例
１と同一条件で鋳造試験を行なった。その結果、セラミ
ックプレートの摩耗速度は潤滑なしの場合よりも減少し
たが、前述の実施例のような顕著な潤滑効果は得られな
かった。(Comparative Example 1) A portion of the side dam on the side of the ceramic plate drum rotating in the rotating direction was not chamfered and was left vertical to the drum end surface, and the casting test was conducted under the same conditions as in Example 1 under other conditions. I did. As a result, the wear rate of the ceramic plate was reduced as compared with the case without lubrication, but the remarkable lubrication effect as in the above-mentioned embodiment was not obtained.
【００３５】（比較例２）続いて、水冷ドラム摺動面へ
の固体潤滑剤押し付け面圧を１kgf/cm2 として強制潤滑
を実施し、それ以外については実施例１と同じ条件で鋳
造試験を行なった。その結果、ドラム端面への潤滑剤の
付着量が少なくなり、前述の実施例のような顕著な潤滑
効果は得られなかった。(Comparative Example 2) Subsequently, forced lubrication was carried out with the surface pressure of the solid lubricant pressing on the sliding surface of the water cooling drum set to 1 kgf / cm 2 , and otherwise the casting test was conducted under the same conditions as in Example 1. I did. As a result, the amount of lubricant adhering to the end surface of the drum was reduced, and the remarkable lubricating effect as in the above-described embodiment was not obtained.
【００３６】（比較例３）さらに、水冷ドラム摺動面へ
の固体潤滑剤押し付け面圧を２０kgf/cm2 として強制潤
滑を実施し、それ以外については実施例１と同じ条件で
鋳造試験を行なった。その結果、ドラム端面への潤滑剤
の付着は良好であったが、鋳造途中で湯差しが発生した
ため、鋳造を中止した。また、鋳片の調査も行ない、潤
滑剤が介在物として鋳片端部に集中して存在し、これが
欠陥となっていることも判明した。(Comparative Example 3) Further, forced lubrication was carried out with the surface pressure of the solid lubricant pressing on the sliding surface of the water-cooled drum being 20 kgf / cm 2 , and otherwise the casting test was carried out under the same conditions as in Example 1. It was As a result, the adhesion of the lubricant to the end surface of the drum was good, but casting was stopped because pouring occurred during casting. Further, the slab was also investigated, and it was found that the lubricant was concentrated as inclusions at the end of the slab, which was a defect.
【００３７】[0037]
【発明の効果】以上説明した如く、本発明によれば、固
体潤滑剤の使用によって鋳造時間を延長することができ
るとともに、摩擦係数低減によるサイド堰の振動発生防
止、冷却ドラム端面あるいはセラミックプレートの寿命
延長などの効果もあって、薄肉鋳片を連続鋳造するに当
たり、長時間にわたって極めて安定した鋳造を行うこと
が可能となった。As described above, according to the present invention, the casting time can be extended by using the solid lubricant, the vibration of the side dam can be prevented by the reduction of the friction coefficient, and the end surface of the cooling drum or the ceramic plate can be prevented. Due to the effect of extending the life, it became possible to perform extremely stable casting for a long time when continuously casting thin-walled slabs.
【図１】サイド堰の概略構成を示す正面図。FIG. 1 is a front view showing a schematic configuration of a side weir.
【図２】（ａ）は従来のサイド堰構造の一例を示す断面
拡大図。（ｂ）及び（ｃ）はいずれも本発明のサイド堰
構造の一例を示す断面拡大図。FIG. 2A is an enlarged cross-sectional view showing an example of a conventional side dam structure. (B) and (c) are both enlarged cross-sectional views showing an example of the side dam structure of the present invention.
【図３】本発明の固体潤滑剤押し付け装置の概略を示す
斜視図。FIG. 3 is a perspective view showing an outline of a solid lubricant pressing device of the present invention.
【図４】双ドラム式薄肉鋳片連続鋳造法の概略を示す斜
視図。FIG. 4 is a perspective view schematically showing a twin-drum type thin cast slab continuous casting method.
【図５】固体潤滑剤の押し付け面圧とサイド堰セラミッ
クプレートの摩耗速度との関係を示す図。FIG. 5 is a diagram showing a relationship between a pressing surface pressure of a solid lubricant and a wear rate of a side dam ceramic plate.
【図６】固体潤滑剤の押し付け面圧と潤滑剤消費指数、
ドラム摺動面への潤滑剤付着指数、潤滑剤起因の鋳片欠
陥発生指数、及び湯差し発生指数との関係を示す図。[Fig. 6] Pressing surface pressure of solid lubricant and lubricant consumption index,
The figure which shows the relationship with the lubricant adhesion index to a drum sliding surface, the cast slab defect generation | occurrence | production index resulting from a lubricant, and the pouring generation | occurrence | production index.
【図７】実施例における冷却ドラム端面とサイド堰セラ
ミックプレート間の摩擦係数と摺動距離との関係を示す
図。FIG. 7 is a diagram showing a relationship between a friction coefficient and a sliding distance between an end surface of a cooling drum and a side dam ceramic plate in an example.
【図８】実施例における冷却ドラム摺動面の摩耗量と摺
動距離との関係を示す図。FIG. 8 is a diagram showing the relationship between the amount of wear of the cooling drum sliding surface and the sliding distance in the example.
【図９】実施例におけるサイド堰セラミックプレートの
摩耗量と摺動距離との関係を示す図である。FIG. 9 is a diagram showing the relationship between the amount of wear of the side dam ceramic plate and the sliding distance in the example.
【図１０】本発明の固体潤滑剤の一例を示す断面模式
図。FIG. 10 is a schematic sectional view showing an example of a solid lubricant of the present invention.
【図１１】本発明の固体潤滑剤の他の例を示す断面模式
図。FIG. 11 is a schematic sectional view showing another example of the solid lubricant of the present invention.
【図１２】固体潤滑剤の押し付け面圧とドラム摺動面へ
の潤滑剤付着指数との関係を示す図。FIG. 12 is a diagram showing a relationship between a pressing surface pressure of a solid lubricant and a lubricant adhesion index on a drum sliding surface.
１ａ、１ｂ 冷却ドラム ２ａ、２ｂ サイド堰 ３ 湯溜り部 ４ 溶融金属 ５ 金属薄帯 ６ ドラムギャップ部 ７ サイド堰ケース ８ 断熱材 ９ ベース部材 １０ セラミックプレート １１ ドラム回転方向入り側部分 １４ａ、１４ｂ 潤滑剤 １５ 冷却ドラム端面 １６ 冷却ドラム摺動面 １７ａ、１７ｂ シリンダー ２０ セラミックプレート摩耗面 1a, 1b Cooling drum 2a, 2b Side weir 3 Hot water pool 4 Molten metal 5 Metal ribbon 6 Drum gap part 7 Side weir case 8 Heat insulating material 9 Base member 10 Ceramic plate 11 Drum rotating direction side part 14a, 14b Lubricant 15 Cooling Drum End Surface 16 Cooling Drum Sliding Surface 17a, 17b Cylinder 20 Ceramic Plate Wear Surface
───────────────────────────────────────────────────── フロントページの続き (72)発明者 浜井 和男 千葉県富津市新富20−１ 新日本製鐵株式 会社技術開発本部内 (72)発明者 江頭 政信 千葉県富津市新富20−１ 新日本製鐵株式 会社技術開発本部内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuo Hamai 20-1 Shintomi, Futtsu City, Chiba Prefecture Nippon Steel Co., Ltd. Technology Development Division (72) Inventor Masanobu Egashira 20-1 Shintomi, Futtsu City, Chiba Prefecture Iron & Steel Co., Ltd.
Claims (5)
間に形成した湯溜まり部に溶融金属を注入し、該溶融金
属を前記冷却ドラムの回転周面で冷却、凝固させながら
薄肉鋳片を製造する薄肉鋳片の連続鋳造方法において、
冷却ドラム端面と摺接するセラミックプレートのドラム
回転方向入り側部分が面取りされたサイド堰を用い、該
サイド堰のドラム回転方向入り側の上流位置の冷却ドラ
ム端面に、使用温度域で固体の潤滑剤（以下、固体潤滑
剤という）を押し付けて連続的に供給することを特徴と
する薄肉鋳片の連続鋳造方法。1. A thin-walled slab while pouring molten metal into a molten metal pool formed between a pair of cooling drums and a pair of side dams, and cooling and solidifying the molten metal on the rotating peripheral surface of the cooling drum. In the continuous casting method of thin-walled slab to produce,
A side dam in which a portion of the ceramic plate that is in sliding contact with the cooling drum end face in the drum rotation direction is chamfered is used. A continuous casting method for a thin cast slab, characterized in that (hereinafter referred to as a solid lubricant) is pressed and continuously supplied.
で冷却ドラム端面に押し付けることを特徴とする請求項
１記載の薄肉鋳片の連続鋳造方法。2. The surface pressure of the solid lubricant is 2 to 15 kgf / cm 2.
The method for continuous casting of thin cast slabs according to claim 1, wherein the end face of the cooling drum is pressed by.
１０mm/minで冷却ドラムの端面に押し付けることを特徴
とする請求項１記載の薄肉鋳片の連続鋳造方法。3. The pressing speed of the solid lubricant is 0.1 to
The continuous casting method for a thin cast slab according to claim 1, wherein the end face of the cooling drum is pressed at 10 mm / min.
気孔を有し、該気孔中に使用温度域で液体の潤滑剤が含
浸された成形体であることを特徴とする請求項１ないし
請求項３のいずれか１項に記載の薄肉鋳片の連続鋳造方
法。4. The molded product, wherein the solid lubricant has pores having a porosity of 2 to 60%, and the pores are impregnated with a liquid lubricant in a working temperature range. The method for continuously casting thin cast pieces according to any one of claims 1 to 3.
該成形体の長手方向に１または２以上の貫通孔を有し、
該貫通孔中に使用温度域で液体の潤滑剤が埋設されてい
ることを特徴とする請求項１ないし請求項３のいずれか
１項に記載の薄肉鋳片の連続鋳造方法。5. The solid lubricant forms a rod-shaped molded body,
Having one or more through holes in the longitudinal direction of the molded body,
The continuous casting method for thin cast slabs according to any one of claims 1 to 3, wherein a liquid lubricant is buried in the through hole in a temperature range of use.
Priority Applications (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09031758A JP3076770B2 (en) | 1996-03-08 | 1997-02-17 | Continuous casting of thin cast slab |
| CN97193902A CN1072053C (en) | 1997-02-17 | 1997-03-19 | Twin drum type sheet steel continuous casting device and continuous casting method therefor |
| AU19436/97A AU704066B2 (en) | 1997-02-17 | 1997-03-19 | Twin drum type continuous strip casting apparatus and continuous casting method for the same |
| KR1019980708308A KR100301095B1 (en) | 1997-02-17 | 1997-03-19 | Twin drum type sheet steel continuous casting device and continuous casting method therefor |
| EP97907403A EP0916432B1 (en) | 1997-02-17 | 1997-03-19 | Twin drum type sheet steel continuous casting device and continuous casting method therefor |
| US09/171,189 US6145581A (en) | 1997-02-17 | 1997-03-19 | Twin drum type sheet steel continuous casting device and continuous casting method therefor |
| PCT/JP1997/000920 WO1998035775A1 (en) | 1997-02-17 | 1997-03-19 | Twin drum type sheet steel continuous casting device and continuous casting method therefor |
| DE69739402T DE69739402D1 (en) | 1997-02-17 | 1997-03-19 | DOUBLE ROLLING DEVICE AND METHOD FOR CONTINUOUSLY PUNCHING STEEL PLATE |
| ZA9702480A ZA972480B (en) | 1997-02-17 | 1997-03-24 | Continuous strip casting apparatus for twin-drum-type casting machine and method for continuous casting. |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5138496 | 1996-03-08 | ||
| JP8-51384 | 1996-03-08 | ||
| JP09031758A JP3076770B2 (en) | 1996-03-08 | 1997-02-17 | Continuous casting of thin cast slab |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09295106A true JPH09295106A (en) | 1997-11-18 |
| JP3076770B2 JP3076770B2 (en) | 2000-08-14 |
Family
ID=26370275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09031758A Expired - Lifetime JP3076770B2 (en) | 1996-03-08 | 1997-02-17 | Continuous casting of thin cast slab |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3076770B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100368276B1 (en) * | 1997-12-20 | 2003-03-17 | 주식회사 포스코 | Method and apparatus for lubricating edge dam in twin roll type continuous strip caster |
| DE112005002733B4 (en) * | 2004-11-15 | 2015-11-19 | Primetals Technologies Japan, Ltd. | Twin Roll Casting Rolling Machine and Twin Roll Cast Rolling Process |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101774647B1 (en) * | 2015-09-23 | 2017-09-05 | 현병찬 | Water reservoir for pot |
-
1997
- 1997-02-17 JP JP09031758A patent/JP3076770B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100368276B1 (en) * | 1997-12-20 | 2003-03-17 | 주식회사 포스코 | Method and apparatus for lubricating edge dam in twin roll type continuous strip caster |
| DE112005002733B4 (en) * | 2004-11-15 | 2015-11-19 | Primetals Technologies Japan, Ltd. | Twin Roll Casting Rolling Machine and Twin Roll Cast Rolling Process |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3076770B2 (en) | 2000-08-14 |
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