JPH01228651A - Method for continuously casting metal strip - Google Patents
Method for continuously casting metal stripInfo
- Publication number
- JPH01228651A JPH01228651A JP5669188A JP5669188A JPH01228651A JP H01228651 A JPH01228651 A JP H01228651A JP 5669188 A JP5669188 A JP 5669188A JP 5669188 A JP5669188 A JP 5669188A JP H01228651 A JPH01228651 A JP H01228651A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- metal
- nozzle
- turbulent flow
- metal strip
- 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
- 239000002184 metal Substances 0.000 title claims abstract description 59
- 238000005266 casting Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000001816 cooling Methods 0.000 claims abstract description 26
- 239000007788 liquid Substances 0.000 claims description 12
- 238000009749 continuous casting Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 230000005499 meniscus Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 238000007599 discharging Methods 0.000 abstract 2
- 238000007654 immersion Methods 0.000 description 10
- 230000007547 defect Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000037303 wrinkles Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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連続鋳造機において、冷
却ドラムの間に形成される湯溜り部の湯面の乱れに起因
した疵、皺等の欠陥発生を防止して、表面性状の優れた
金属薄帯を鋳造する方法に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to a twin-drum type continuous casting machine, in which defects such as scratches and wrinkles are caused by disturbances in the surface of the molten metal in the pool formed between the cooling drums. The present invention relates to a method of casting a metal ribbon with excellent surface quality while preventing the occurrence of defects.
最近、溶鋼等の溶融金属から最終形状に近い数１１１ｍ
〜数十ｍ１程度の厚みをもつ金属薄帯を直接的に製造す
る方法が注目されている。この連続鋳造方法によるとき
、従来のような多段階にわたる熱延工程を必要とするこ
となく、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が可能となる。Recently, several 111 meters of molten metal such as molten steel that is close to the final shape
A method of directly producing a metal ribbon having a thickness of about several tens of millimeters is attracting attention. When this continuous casting method is used, there is no need for a multi-step hot rolling process as in the conventional method, and only a light rolling process is required to form the final shape, making it possible to simplify the process and equipment.
第３図は、この連続鋳造法の一つとして知られているツ
インドラム方式の連続鋳造機の設備構成を示す（特開昭
６０−１３７５６２号公報参照）。FIG. 3 shows the equipment configuration of a twin-drum continuous casting machine that is known as one of the continuous casting methods (see Japanese Patent Laid-Open No. 137562/1983).
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ｌａ、 ｌｂの間に、ドラム軸方向両端をサイ
ド堰２ａ、 ２ｂで仕切り、湯溜り部３を形成する。こ
の湯溜り部３に溶融金属４を注入し、冷却ドラムｌａ、
ｌｂを介して溶融金属４を抜熱することにより、それ
ぞれの冷却ドラムｌａ、 ｌｂの周面に凝固シェルを形
成させる。この凝固シェルは、成長しながら冷却ドラム
ｌａ、 ｌｂの回転に伴ってドラムギャップ５に移行す
る。ドラムギャップ５で、それぞれの冷却ドラムｌａ、
ｌｂ周面に形成された凝固シェルは、圧接・一体化さ
れ、金属薄帯６として冷却ドラムｌａ、 ｌｂ間から
搬出される。In this system, a pool 3 is formed between a pair of cooling drums la and lb that rotate in opposite directions, with side weirs 2a and 2b partitioning both ends in the axial direction of the drums. Molten metal 4 is injected into this pool 3, cooling drum la,
By removing heat from the molten metal 4 through the cooling drums la and lb, a solidified shell is formed on the circumferential surface of each of the cooling drums la and lb. As the solidified shell grows, it moves to the drum gap 5 as the cooling drums la, lb rotate. With a drum gap 5, each cooling drum la,
The solidified shell formed on the circumferential surface of lb is pressed and integrated, and is carried out as a thin metal strip 6 from between the cooling drums la and lb.
このように金属薄帯６を製造する際、湯溜り部３の液面
に乱れがあると、冷却ドラムｌａ、 ｌｂの周面におけ
る冷却条件が不安定となり、凝固シェルの成長が不均一
になる。この凝固シェルをドラムギャップ５で圧接する
とき、ドラム軸方向に関して不均一な圧下刃が凝固シェ
ルに働き、金属薄帯６に割れ、皺等の欠陥を発生させる
原因となる。When manufacturing the metal ribbon 6 in this way, if there is any disturbance in the liquid level in the pool 3, the cooling conditions on the circumferential surfaces of the cooling drums la and lb become unstable, resulting in uneven growth of the solidified shell. . When this solidified shell is pressed against the drum gap 5, the rolling blades which are uneven in the drum axial direction act on the solidified shell, causing defects such as cracks and wrinkles in the metal ribbon 6.
そこで、たとえば特開昭５７−３２８５２号公報にあっ
ては、鋳造ドラムと液面が接する点をフラッパーと称さ
れる耐火物製の溶湯保持器でおおい、この耐火物によっ
て湯溜の冷却開始点を規制して、液面の乱れが冷却開始
点に影響を与えないような技術が小型の試ｔｉでは用い
られている実績を示している。Therefore, for example, in Japanese Patent Application Laid-open No. 57-32852, the point where the casting drum and the liquid surface contact is covered with a molten metal holder made of a refractory material called a flapper, and this refractory material is used as a starting point for cooling the molten metal. This shows that technology has been used in small-scale test systems to regulate the temperature so that turbulence in the liquid level does not affect the cooling start point.
しかし、湯溜り部３にフラッパーを配置するとき、溶融
金属４の流動が拘束され、フラッパー近傍で溶融金Ｒ４
が滞留することになる。この滞留した溶融金属４は、フ
ラッパー先端に凝固物として成長する。この凝固物がド
ラムの表面より成長した凝固シェルとつながると、凝固
物がフラッパー先端より離脱して、鋳片表面に異物とし
て残留し、鋳片表面を悪化させる。However, when the flapper is placed in the sump 3, the flow of the molten metal 4 is restricted, and the molten metal R4 is disposed near the flapper.
will remain. This retained molten metal 4 grows as a solidified substance at the tip of the flapper. When this solidified material connects with the solidified shell that has grown from the surface of the drum, the solidified material separates from the tip of the flapper and remains as a foreign material on the surface of the slab, deteriorating the surface of the slab.
そこで、本発明は、湯溜り部に溶融金属の滞留を促すよ
うな部材を配置することなく、注湯ノズルの浸漬状態を
制御することによって、液面の波立ちを抑制し、表面性
状の優れた金属薄帯を製造することを目的とする。Therefore, the present invention suppresses ripples on the liquid surface by controlling the immersion state of the pouring nozzle without arranging any member that promotes the retention of molten metal in the molten metal pool. The purpose is to manufacture metal ribbon.
本発明の連続鋳造方法は、その目的を達成するために、
一対の冷却ドラムの間に形成された湯溜り部に供給した
溶融金属を急冷・凝固して金属薄帯を製造する際、前記
湯溜り部に浸漬した注湯ノズルの溶融金属流出口から前
記湯溜り部の液面までの距離を、鋳造速度に比例して増
加又は減少させることを特徴とする。In order to achieve the purpose of the continuous casting method of the present invention,
When producing a metal ribbon by rapidly cooling and solidifying molten metal supplied to a pool formed between a pair of cooling drums, the molten metal is poured from the molten metal outlet of a pouring nozzle immersed in the pool. It is characterized in that the distance to the liquid level in the reservoir is increased or decreased in proportion to the casting speed.
湯溜り部３に浸漬された注湯ノズル７の流出口８から噴
出する溶融金属は、第２図（ａ）に示すように上昇流４
ａ及び下降流４ｂとなって冷却ドラムｌａ。The molten metal ejected from the outlet 8 of the pouring nozzle 7 immersed in the molten metal pool 3 flows in an upward flow 4 as shown in FIG. 2(a).
a and a downward flow 4b to the cooling drum la.
１ｂの周面に沿って広がる。他方、冷却ドラムｌａ。It spreads along the circumferential surface of 1b. On the other hand, the cooling drum la.
１ｂは、第２図ら）の矢印で示す方向に回転しているの
で、その周面に形成された凝固シェル９と湯溜り部３の
溶融金属との界面に流れの境界層１０が生じる。流れの
境界層１０は、流出口８から噴出した溶融金属流に干渉
される。特に、流出口８の中心線から上にある流れの境
界層１０は、上昇流４ａによって乱され乱流状態となる
。1b is rotating in the direction shown by the arrow in FIGS. 2, et al., a boundary layer 10 of flow is generated at the interface between the solidified shell 9 formed on its circumferential surface and the molten metal in the sump 3. The flow boundary layer 10 is interfered with by the molten metal stream emerging from the outlet 8. In particular, the boundary layer 10 of the flow above the centerline of the outlet 8 is disturbed by the upward flow 4a and becomes turbulent.
この乱流域の高さＨが湯溜り部３の液面３ａに達すると
メニスカス１１部が異常に変動して、冷却ドラムｌａ、
ｌｂの周面に最初に生成される凝固シェル９が極めて
不安定なものとなる。その結果、冷却ドラムｌａ、
ｌｂのドラム軸方向に関して凝固ンエル９の肉厚が変動
し、疵、皺等の欠陥が多発する。When the height H of this turbulent area reaches the liquid level 3a of the water reservoir 3, the meniscus 11 changes abnormally, and the cooling drum la,
The solidified shell 9 that is first generated on the circumferential surface of lb becomes extremely unstable. As a result, the cooling drum la,
The wall thickness of the coagulation well 9 fluctuates in the axial direction of the lb drum, and defects such as scratches and wrinkles occur frequently.
本発明においては、注湯ノズル７の浸漬深さを制御する
ことにより、乱流域の高さＨを湯溜り部３の液面３ａに
達しない値とし、湯溜り部３の液面３ａが冷却ドラムｌ
ａ、 ｌｂに接触する個所、すなわちメニスカス１１近
傍における溶融金属の乱れを抑制している。これにより
、凝固シェル９の生成条件を安定化させ、肉厚変動の少
ない金属薄帯を製造することが可能となる。In the present invention, by controlling the immersion depth of the pouring nozzle 7, the height H of the turbulent region is set to a value that does not reach the liquid level 3a of the molten metal pool 3, and the liquid level 3a of the molten metal sump 3 is cooled. drum l
Disturbance of the molten metal is suppressed at the point where it comes into contact with a and lb, that is, near the meniscus 11. This makes it possible to stabilize the conditions for producing the solidified shell 9 and to produce a metal ribbon with less variation in thickness.
注湯ノズル７を浸漬する深さは、具体的には次のように
して定められる。乱流域の高さＨは、注湯ノズル７から
の溶融金属流出速度ひ。（ｍ／秒）及び第２図（ｄ）で
示す流出口８から冷却ドラムｌａ。Specifically, the depth to which the pouring nozzle 7 is immersed is determined as follows. The height H of the turbulent area is determined by the flow rate of molten metal from the pouring nozzle 7. (m/sec) and the cooling drum la from the outlet 8 shown in FIG. 2(d).
１ｂ周面までの水平距離Ｉ２（ｍ）との間に、次式で示
す関係にある。There is a relationship between horizontal distance I2 (m) to the circumferential surface of 1b as shown in the following equation.
Ｈ＝ ｋ−ｖ ｏ・ｌ Ｉ／４
＝ｋ・（Ｑ／ｄ−ｗ）・１１／４ ・・・（１）ただし
、Ｑは、吐出流量（ｍ”７秒）
ｄは、流出口８の高さ（ｍ）
Ｗは、流出口８の幅（ｍ）
（１１式は、主に水モデル実験の結果で得られた式であ
るが、乱流域の高さＨは、溶融金属流出速度び。に比例
し、注湯ノズル７の流出口８と冷却ドラムｌａ、 ｌｂ
周面までの距離ｌの１／４乗に比例した。比例定数には
実機の０．６倍の規模の水モデルでに＝２が得られた。H= k-v o・l I/4 =k・(Q/d-w)・11/4...(1) However, Q is the discharge flow rate (m"7 seconds) d is the outlet 8 height (m) W is the width of the outlet 8 (m) (Equation 11 is an equation obtained mainly from the results of water model experiments, but the height H of the turbulent area is determined by the molten metal outflow velocity. and the outlet 8 of the pouring nozzle 7 and the cooling drum la, lb
It was proportional to the 1/4th power of the distance l to the circumferential surface. For the proportionality constant, a value of 2 was obtained using a water model that was 0.6 times larger than the actual model.
この値をフルード数を一致させて、実機にあてはめると
に＝３程度の値となる。If this value is applied to the actual machine by matching the Froude number, the value will be approximately 3.
ここで、吐出流ＩＱは、鋳造速度ｔｚ、（ｍ／秒）と鋳
造する金属薄帯の板厚ｔ（ｍ）との関係において、次式
で表される。Here, the discharge flow IQ is expressed by the following equation in the relationship between the casting speed tz, (m/sec) and the thickness t (m) of the metal ribbon to be cast.
Ｑ＝ｔｒ、、ｔ ・・・（２）したがっ
て、乱流域の高さＨを表す（１）式は、次の（３）式に
書き替えられる。Q=tr,,t...(2) Therefore, the equation (1) expressing the height H of the turbulent area can be rewritten as the following equation (3).
−ｗ
乱流域の高さＨは、流出口８の中心からの値である。こ
の乱流域の高さＨが湯溜り部３の液面３ａよりも低いと
きには、乱流の影響がメニスカス１１に現れず、安定し
た条件下で凝固シェル９の生成が開始される。ところで
、同一の設備構成においては流出口８の高さｄ及び幅Ｗ
は一定であり、また同一サイズの金属薄帯を製造する場
合には鋳造板厚を及び水平距離ｌも一定となる。したが
って乱流域の高さＨは、鋳造速度びＲに比例した値とな
る。-w The height H of the turbulent area is the value from the center of the outlet 8. When the height H of this turbulent region is lower than the liquid level 3a of the sump 3, the effect of turbulence does not appear on the meniscus 11, and the formation of the solidified shell 9 starts under stable conditions. By the way, in the same equipment configuration, the height d and width W of the outlet 8
is constant, and when manufacturing thin metal strips of the same size, the thickness of the cast plate and the horizontal distance l are also constant. Therefore, the height H of the turbulent region has a value proportional to the casting speed R.
このようにして、鋳造速度ｖｌ との関係において乱流
域の高さ■１を設定するとき、メニスカス１１の近傍に
乱流が生じず、凝固シェル９の生成がドラム軸方向に関
して均一になる。その結果、ドラムギャップで圧接され
る凝固シェル９に均一な圧下刃が働き、疵９割れ、ｍ等
がない優れた表面性状の金属薄帯が得られる。In this way, when the height of the turbulent region 1 is set in relation to the casting speed vl, turbulence does not occur near the meniscus 11, and the solidified shell 9 is uniformly formed in the drum axial direction. As a result, a uniform reduction blade acts on the solidified shell 9 that is pressed against the drum gap, and a metal ribbon with excellent surface properties and no scratches, cracks, m, etc. is obtained.
径１２０Ｏｎ＋＋ｎでドラム軸方向長さ８００ｍの冷却
ドラムを対として配置し、定常状態でドラム軸方向長さ
８００ｓで幅２８０ｍ＋＋ｎの湯溜り部を形成した。こ
の湯溜り部に注湯ノズルを浸漬し、５ＵＳ３０４のステ
ンレス鋼組成をもち温度１４６５℃の溶鋼を６００〜１
４００ｋｇ／分の流量で注入した。Cooling drums each having a diameter of 120On++n and a length of 800m in the axial direction of the drums were arranged as a pair, and a pool portion with a length of 800s in the axial direction of the drums and a width of 280m++n was formed in a steady state. A pouring nozzle is immersed in this pool, and molten steel having a stainless steel composition of 5US304 and a temperature of 1465°C is poured into
It was injected at a flow rate of 400 kg/min.
第１図は、得られた金属薄帯の割れの発生限界を、注湯
ノズルの浸漬深さ、鋳造速度との関係において表したグ
ラフである。図中、板厚２關と４ｍＩＩＩについて、そ
れぞれ割れの発生限界を示した。FIG. 1 is a graph showing the crack occurrence limit of the obtained metal ribbon in relation to the immersion depth of the pouring nozzle and the casting speed. In the figure, the crack occurrence limits are shown for plate thicknesses of 2 mm and 4 mm, respectively.
いずれの場合１；も割れ発生を防止するためには、湯面
変動量を４ ｓ以下に抑えることが必要であった。すな
わち、実際に鋳造しているときに、冷却ドラムと溶爛面
が接しているメニスカス部をビデオカメラで観察して、
メニスカス部の挙動と金属薄帯に発生している縦割れの
位置とを対応させると、湯面変動量が４ ｍｍ以上ある
と縦割れが発生するという結果を得ることができた。こ
の４ ｍｍの湯面変動量発生限界線も鋳造速度、注湯ノ
ズルの浸漬深さとの関係において整理できて、それは第
１図の割れ発生限界線と一致した。In either case 1, in order to prevent the occurrence of cracks, it was necessary to suppress the amount of fluctuation in the molten metal level to 4 seconds or less. In other words, during actual casting, the meniscus area where the cooling drum and molten surface are in contact is observed with a video camera, and
By correlating the behavior of the meniscus portion with the position of vertical cracks occurring in the metal ribbon, we were able to obtain the result that vertical cracks occur when the level fluctuation is 4 mm or more. This 4 mm level fluctuation occurrence limit line could also be arranged in relation to the casting speed and the immersion depth of the pouring nozzle, and it coincided with the crack occurrence limit line in Figure 1.
湯面変動量を４ ＋ｎｍ以下にするため、注湯ノズルの
浸漬深さを鋳造速度との関係で規制する手段を採用した
。すなわち、板厚２ｍｌ１１の金属薄帯を製造するとき
、第１図へに示すように鋳造速度が５０ｍ／分（−０，
８３ｍ／秒）と遅いときには、注湯ノズルの浸漬深さが
３０ｍｍであれば、第２図（Ｃ）を使用して説明した乱
流域が湯溜り部３の液面３ａに達することなく湯面変動
量は４ ＋ｎｍ以下となり、安定した条件下で凝固シェ
ル９の成長が行われた。しかし、第１図已に示すように
速度が７２ｍ／分（＝１．２ｍ／秒）の条件では、ノズ
ル浸漬深さが同様に３０市であっても湯面変動量は３
ｍｍと大きくなり、金属薄帯表面に縦割れが現れた。ま
た、第１図Ｃに示すように鋳造速度を１２０ ｍ ／分
（＝２．Ｏｍ／秒）まで増加させたとき、注湯ノズルの
浸漬深さを６０＋ｎｍと大きくすることにより、湯溜り
部３の液面３ａに乱流域の影響が現れることを防止し、
割れのない金属薄帯を製造することができた。しかし、
速度を更に増して、第１図りに示すようにノズル浸漬深
さ６０ｍｍ、 鋳造速度１３２ｍ／分（２，２ｍ ／
秒）テハ割しカ検出された。In order to keep the level fluctuations below 4 + nm, a method was adopted to regulate the immersion depth of the pouring nozzle in relation to the casting speed. That is, when manufacturing a metal ribbon with a plate thickness of 2 ml11, the casting speed is 50 m/min (-0,
83 m/sec), if the immersion depth of the pouring nozzle is 30 mm, the turbulent area explained using Fig. 2 (C) will not reach the liquid level 3a of the pool 3 and the hot water level will rise. The amount of variation was 4 + nm or less, and the solidified shell 9 was grown under stable conditions. However, as shown in Figure 1, when the speed is 72 m/min (=1.2 m/sec), even if the nozzle immersion depth is 30 mm, the amount of fluctuation in the melt level is 3.
mm, and vertical cracks appeared on the surface of the metal ribbon. Furthermore, when the casting speed is increased to 120 m/min (=2.0m/sec) as shown in Fig. to prevent the influence of the turbulent region from appearing on the liquid level 3a,
We were able to produce a metal ribbon without cracks. but,
The speed was further increased to a nozzle immersion depth of 60 mm and a casting speed of 132 m/min (2.2 m/min) as shown in the first diagram.
(Seconds) Detection of overload.
さらに板厚４印の金属薄帯を製造するとき、注湯ノズル
の浸漬深さを一定値８０ｍ＋ｎに維持して鋳造速度を変
化させたところ、鋳造速度８０ｍ／分（−１、３３ｍ
／秒、第１図Ｅ）では金属薄帯の表面に割れがみられな
かった。しかし、鋳造速度が８４ｍ／分（＝１．４ ｍ
／秒、第１図Ｆ）を超えたとき、多数の割れが表面に検
出された。Furthermore, when manufacturing a metal ribbon with a plate thickness of 4 marks, the immersion depth of the pouring nozzle was maintained at a constant value of 80 m + n and the casting speed was varied.
/second (Fig. 1E), no cracks were observed on the surface of the metal ribbon. However, the casting speed was 84 m/min (=1.4 m
/second, Figure 1F), a large number of cracks were detected on the surface.
以上に説明したように、本発明においては、鋳造速度の
増加に伴って注湯ノズルの浸漬深さを大きくすることに
より、注）易ノズルから噴出される溶融金属によって生
じる乱流の影響がメニスカス近傍に現れることを防止し
ている。したがって、冷却ドラムの周面で最初に生じる
凝固シェルの生成条件が安定したものとなり、幅方向に
関する肉厚変動の少ない凝固シェルがドラムギャップで
圧下される。その結果、不均一な圧下刃が凝固シェルに
作用することがなく、得られた金属薄帯の表面性状は優
れたものとなる。As explained above, in the present invention, by increasing the immersion depth of the pouring nozzle as the casting speed increases, the influence of the turbulent flow caused by the molten metal spouted from the easy nozzle can be reduced. This prevents them from appearing in the vicinity. Therefore, the conditions for producing the solidified shell that first occurs on the circumferential surface of the cooling drum are stable, and the solidified shell with less variation in wall thickness in the width direction is rolled down in the drum gap. As a result, the uneven rolling blade does not act on the solidified shell, and the surface quality of the obtained metal ribbon is excellent.
第１図は本発明の効果を具体的に表したグラフであり、
第２図は湯溜り部における溶融金属の挙動を説明するた
めの図である。他方、第３図は、従来のツインドラム方
式の連続鋳造機を示す。
特許出願人 新日本製鐵 株式會社（ほか１名）
代 理 人 小 堀 益 （ほか２名）第
１ 図
Ｖ＊（ｍ／′ｓ）
竿 ２ 図
十ｄ
カス
−の高ピ
］８の漕
」
中 ３ 図
ｂ
１さFIG. 1 is a graph specifically showing the effects of the present invention.
FIG. 2 is a diagram for explaining the behavior of molten metal in the sump. On the other hand, FIG. 3 shows a conventional twin-drum type continuous casting machine. Patent applicant: Nippon Steel Corporation (and 1 other person) Agent: Masu Kobori (and 2 others) Fig. 1 V* (m/'s) Rod 2 Fig. 1d High pitch of caster] Row 8 ” Middle 3 Figure b 1
Claims (1)
した溶融金属を急冷・凝固して金属薄帯を製造する際、
前記湯溜り部に浸漬した注湯ノズルの溶融金属流出口か
ら前記湯溜り部の液面までの距離を、鋳造速度に比例し
て増加又は減少させることを特徴とする金属薄帯の連続
鋳造方法。1. When manufacturing a metal ribbon by rapidly cooling and solidifying molten metal supplied to a pool formed between a pair of cooling drums,
A continuous casting method for a metal ribbon, characterized in that the distance from the molten metal outlet of a pouring nozzle immersed in the molten metal pool to the liquid level in the molten metal pool is increased or decreased in proportion to the casting speed. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5669188A JPH07106430B2 (en) | 1988-03-09 | 1988-03-09 | Continuous casting method for metal ribbon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5669188A JPH07106430B2 (en) | 1988-03-09 | 1988-03-09 | Continuous casting method for metal ribbon |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01228651A true JPH01228651A (en) | 1989-09-12 |
| JPH07106430B2 JPH07106430B2 (en) | 1995-11-15 |
Family
ID=13034475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5669188A Expired - Fee Related JPH07106430B2 (en) | 1988-03-09 | 1988-03-09 | Continuous casting method for metal ribbon |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07106430B2 (en) |
-
1988
- 1988-03-09 JP JP5669188A patent/JPH07106430B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07106430B2 (en) | 1995-11-15 |
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