JPH05169202A - Manufacture of wide thin band material - Google Patents

Abstract

PURPOSE:To prevent irregularity of quality in the breadthwise direction by linearly arranging plural bars for controlling the feeding flow of molten metal in the breadthwise direction in the flow passage of the feeding flow of molten metal, adjusting the dipping depth of these control bars into the metal in the molten or semisolidified state and executing controlling flow distribution in the breadthwise direction. CONSTITUTION:A wide thin band material is obtained by leading a metal in the molten or semisolidified state which is passed through a wide dam or slit nozzle 2 onto a movable cooling surface. The plural bars 5 for controlling the feeding flow of molten metal are linearly arranged over the breadthwise direction and the flow distribution in the breadthwise direction that is poured onto the moving cooling surface is controlled by adjusting the dipping depth of the bar for controlling the feeding flow of molten metal into the metal in the molten or semisolidi-fied state. In this way, the wide thin band material of metal or alloy can be easily manufactured in the good state without almost generating irregularity of quality in the breadth-wise direction.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は溶融あるいは半凝固状態
の鋼、銅、アルミニウム等の金属又は合金の広幅薄帯材
の製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a wide strip material of a metal or alloy such as steel, copper or aluminum in a molten or semi-solid state.

【０００２】[0002]

【従来の技術】溶融ないしは半凝固状態の金属又は合金
の広幅堰からの溢流ないしはスリットノズルを通した注
入流を移動冷却面として働く回転ロール又はロール対に
向けて導くことによって薄帯材を得ることは既知であ
る。しかし単にその給湯幅を拡げただけでは、移動冷却
面に達する落下給湯に縮流するために集束を生じ勝ちで
あり、このため冷却面上で幅方向の温度分布が不均一と
なり、薄帯材の品質が損なわれる欠点があった。2. Description of the Related Art A thin strip material is guided by directing an overflow or an injection flow from a wide weir of a molten or semi-solidified metal or alloy through a slit nozzle toward a rotating roll or a pair of rolls serving as a moving cooling surface. It is known to obtain. However, simply widening the hot water supply width tends to cause converging due to the contraction of the falling hot water reaching the moving cooling surface, which causes an uneven temperature distribution in the width direction on the cooling surface, resulting in thin strip material. There was a drawback that the quality of the.

【０００３】[0003]

【発明が解決しようとする課題】従来の技術における上
記の欠点を除いて幅方向の品質むらのない、鋼、銅、ア
ルミニウム等の金属又は合金の広幅薄帯材の適切な製造
方法を与えることがこの発明の目的である。SUMMARY OF THE INVENTION It is an object of the present invention to provide a suitable method for producing a wide strip material of a metal or alloy such as steel, copper, aluminum or the like, which is free from quality irregularities in the width direction, except for the above-mentioned drawbacks in the prior art. Is the object of the present invention.

【０００４】[0004]

【課題を解決するための手段】溶融ないしは半凝固状態
の金属又は合金の広幅堰からの溢流ないしはスリットノ
ズルを通した注入流による落下給湯中の縮流回避を目指
した研究実験をあまた行った結果、該給湯流の流路中に
制御桿を配設することにより簡便有効に給湯幅を広げ得
るごとを知った。この知見に基いてこの発明は、次の事
項を骨子とする構成により上記目的を達成したものであ
る。[Means for Solving the Problem] A research experiment was conducted again with the aim of avoiding a contraction flow during falling hot water supply due to overflow from a wide weir of molten or semi-solidified metal or alloy or injection flow through a slit nozzle. As a result, they have found that the hot water supply width can be easily and effectively increased by disposing the control rod in the flow path of the hot water supply flow. Based on this finding, the present invention achieves the above-mentioned object by a structure having the following points as its gist.

【０００５】広幅堰ないしはスリットノズルを通る、溶
融もしくは半凝固状態の金属又は合金の幅広給湯流を、
移動冷却面上に導くことによって広幅薄帯材を得るに当
り、該広幅給湯流の流路中でその幅方向にわたって列状
に並ぶ複数の給湯流制御桿を配設して、これら給湯流制
御桿の広幅給湯流中への浸漬深さの調整により、広幅給
湯流の幅方向の流量分布の制御を行うこと、を特徴とす
る、金属又は合金の広幅薄帯材の製造方法。制御桿の浸
漬深さの調整を、移動冷却面上で生成した広幅薄帯材の
板厚計測に基く指令信号によって、フィードバック制御
する上掲製造方法。A wide hot water flow of a molten or semi-solidified metal or alloy passing through a wide weir or slit nozzle,
When a wide strip material is obtained by guiding it onto the moving cooling surface, a plurality of hot water supply flow control rods are arranged in a row in the width direction of the wide hot water supply flow to arrange the hot water supply flow control. A method for producing a wide strip material of a metal or an alloy, characterized in that the flow rate distribution in the width direction of the wide hot water supply flow is controlled by adjusting the depth of immersion of the rod in the wide hot water supply flow. The above-mentioned manufacturing method in which the immersion depth of the control rod is feedback-controlled by a command signal based on the measurement of the thickness of the wide strip material generated on the moving cooling surface.

【０００６】図１にてこの発明の方法を、とくに半凝固
状態の金属又は合金（つまり固相粒子が液相中に混在し
たスラリ状をなし、以下スラリ材料という）をスラリ容
器１に受入れ、その容器底に設けてあるスリットノズル
２を通して、移動冷却面３として働くツインロール式ス
トリップキャスタ４に導く事例に適用した場合について
図解し、５はスリットノズル２の幅方向にわたって、図
１のＡ−Ａ線に沿う断面を図２に示すようにして列設し
た複数の制御桿、６は制御桿の昇降調節を司るアクチュ
エータ、また７は板厚センサである。Referring to FIG. 1, the method of the present invention is applied to a slurry container 1 in which a metal or an alloy in a semi-solid state (that is, a slurry in which solid phase particles are mixed in a liquid phase, hereinafter referred to as a slurry material) is received. The case of application to a twin roll type strip caster 4 acting as a moving cooling surface 3 through a slit nozzle 2 provided at the bottom of the container is illustrated, and 5 is shown across the width direction of the slit nozzle 2 as indicated by A- in FIG. A plurality of control rods are arranged in a row along the line A as shown in FIG. 2, 6 is an actuator for controlling the elevation of the control rod, and 7 is a plate thickness sensor.

【０００７】スラリ材料は例えば合金組成の調整を行っ
た、溶湯に別途、強冷却下の強制攪拌を加えることによ
って固液混相とし、その固相率をスリットノズルからの
注入の妨げとならぬ範囲の温度で、スラリ容器１に移注
するものとする。For example, the slurry material is adjusted to have an alloy composition, and the melt is separately subjected to forced agitation under strong cooling to form a solid-liquid mixed phase, and the solid fraction is within a range that does not hinder injection from the slit nozzle. It shall be transferred to the slurry container 1 at the temperature of.

【０００８】また図３には、やはりスラリ容器１の機能
をもつタンディッシュ８に広幅堰９を設けて、この広幅
堰９からの溢流を図１に示したのと同様なストリップキ
ャスタ４に導く事例における適用を図解し、この場合制
御桿５は広幅堰の幅方向にわたって複数を列設し、溢流
給湯流の流路中に先端を浸漬させる。なお板厚センサ７
は図示を省略した。Further, in FIG. 3, a wide weir 9 is provided on the tundish 8 which also has the function of the slurry container 1, and the overflow from this wide weir 9 is applied to the strip caster 4 similar to that shown in FIG. Illustrating the application in the guiding case, in this case, a plurality of control rods 5 are arranged in a row in the width direction of the wide weir, and the tip is immersed in the flow path of the overflow hot water supply flow. The plate thickness sensor 7
Are not shown.

【０００９】[0009]

【作用】スラリ容器１からスリットノズル２を経てスト
リップキャスタ４に向かうスラリ材料の給湯流は、その
流路の幅方向にわたって列状に並ぶ複数の制御桿５に沿
って、スリットノズル２の幅方向に分散された状態で流
下するから十分に広い幅のスリットノズル２を用いて
も、幅方向の流量分布がほぼ一様化されてストリップキ
ャスタ４に達し、そこでの移動冷却作用を受けて凝固
し、かくして広幅薄帯材として放出される。The hot water supply flow of the slurry material from the slurry container 1 through the slit nozzles 2 to the strip casters 4 follows the plurality of control rods 5 arranged in a row in the width direction of the slit nozzles 2 in the width direction of the slit nozzles 2. Even if a slit nozzle 2 having a sufficiently wide width is used because it flows down in a dispersed state, the flow distribution in the width direction is almost uniform and reaches the strip caster 4, where it is solidified by the moving cooling action. Thus, it is released as a wide ribbon.

【００１０】ストリップキャスタ４の出側にて板厚セン
サ７により広幅薄帯材の板厚計測を行い、これに基く指
令信号によって制御桿の浸漬深さの調整を行い、広幅帯
材の幅方向における板厚の一様化を図る。図３の事例に
あってもほぼ同様な作用が生じるのは説明を加える要も
ない。The strip thickness of the wide thin strip material is measured by the strip thickness sensor 7 on the exit side of the strip caster 4, and the immersion depth of the control rod is adjusted by the command signal based on the measurement. The thickness of the plate to be uniform. Even in the case of FIG. 3, it is not necessary to add the explanation that substantially the same operation occurs.

【００１１】[0011]

【実施例】鋳造有効幅1000mmで、ロール径 500mmφの銅
製ツインロール式ストリップキャスター４を用いて、ス
テンレス鋼(SUS 304) の薄帯材を製造した。スリットノ
ズル２は、幅 950mmにわたって、すき間10mmで、アルミ
ナグラファイト製である。給湯流制御桿５は先細りテー
パーを付した外径５〜８mmの丸棒を用いZrB₂製である。
この制御桿５は、幅方向50mmおきに19本用いた。ロール
間隔は２mmとして、ステンレス鋼は液相線温度より30℃
高い（ΔＴ＝30℃）溶融の場合と固相が20％程度ある
（ｆ_S ＝ 0.2) の半凝固状態の場合で給湯した。ΔＴ＝
30℃ではロール周速度を30ｍ／min で、ｆ_S ＝0.2 では
45ｍ／min で回転させた。Example A thin strip of stainless steel (SUS 304) was manufactured using a copper twin roll type strip caster 4 having a casting effective width of 1000 mm and a roll diameter of 500 mmφ. The slit nozzle 2 is made of alumina graphite with a width of 950 mm and a gap of 10 mm. The hot water supply flow control rod 5 is made of ZrB ₂ using a round bar having an outer diameter of 5 to 8 mm which is tapered.
19 control rods 5 were used every 50 mm in the width direction. Roll spacing is 2 mm, stainless steel is 30 ° C above the liquidus temperature
Hot water was supplied in the case of high melting (ΔT = 30 ° C.) and in the case of semi-solidified state where the solid phase was about 20% (f _S = 0.2). ΔT =
At 30 ° C, the roll peripheral speed is 30 m / min, and when f _S = 0.2,
It was rotated at 45 m / min.

【００１２】このようにして製造してきたステンレス鋼
の薄帯材（厚み２mm×幅1000mm) の品質は良好であっ
た。The quality of the stainless steel thin strip material (thickness 2 mm × width 1000 mm) produced in this manner was good.

【００１３】以上のようにして、制御桿５を使用しなか
ったとき、給湯流が縮流により幅中央部に集まるため、
冷却体であるロールでのこの中央部の凝固が遅れ成分偏
析が生じ薄帯材の材質に不具合があったのに反して制御
桿の適切な浸漬深さの調整を行うことにより、何れの場
合も品質の良好な薄帯材が得られた。As described above, when the control rod 5 is not used, the hot water supply flow gathers in the center of the width due to contraction.
The central part of the roll, which is the cooling body, is delayed in solidification and the segregation of the components causes segregation of the ribbon material. A thin strip material of good quality was obtained.

【００１４】なお実操業中に不可避なスラリ材料の温度
低下による粘性の変動に対応して板厚の変化が生じた
が、板厚センサ７による制御桿５の浸漬深さの調整を加
えることによって長手方向にも幅及び厚みの揃った薄帯
材が得られた。以上スラリ材料についての実施例を掲げ
たが液相のみの溶湯にあってもほぼ同様な実施成績が得
られた。Although the plate thickness changes in response to the viscosity fluctuation due to the temperature drop of the slurry material which is unavoidable during the actual operation, by adjusting the immersion depth of the control rod 5 by the plate thickness sensor 7, A thin strip material having a uniform width and thickness in the longitudinal direction was obtained. Although the examples of the slurry material have been described above, substantially the same performance results were obtained even in the case of the melt containing only the liquid phase.

【００１５】[0015]

【発明の効果】金属又は合金の広幅薄帯材が、幅方向の
品質むらをほとんど生じることなく、良好な形状で容易
に製造できる。EFFECTS OF THE INVENTION A wide strip material of metal or alloy can be easily manufactured in a good shape with almost no quality unevenness in the width direction.

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

【図１】広幅薄帯材の製造領域説明図である。FIG. 1 is an explanatory view of a manufacturing region of a wide thin strip material.

【図２】図１のＡ−Ａ線に沿う断面図である。FIG. 2 is a sectional view taken along the line AA of FIG.

【図３】他の実施態様の説明図である。FIG. 3 is an explanatory diagram of another embodiment.

【符号の説明】[Explanation of symbols]

１ スラリ容器 ２ スリットノズル ３ 移動冷却面 ４ ストリップキャスタ ５ 給湯流制御桿 ７ 板厚センサ ８ タンディッシュ ９ 広幅堰 1 Slurry container 2 Slit nozzle 3 Moving cooling surface 4 Strip caster 5 Hot water supply control rod 7 Plate thickness sensor 8 Tundish 9 Wide weir

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 広幅堰ないしはスリットノズルを通る、
溶融もしくは半凝固状態の金属を、移動冷却面上に導く
ことによって広幅薄帯材を得るに当り、 幅方向にわたって列状に並ぶ複数の給湯流御桿を配設し
て、溶融もしくは半凝固状態の金属へのこれら給湯流制
御桿の浸漬深さの調整により、移動冷却面に注入される
幅方向の流量分布の制御を行うこと、を特徴とする、広
幅薄帯材の製造方法。1. Passing through a wide weir or slit nozzle,
In order to obtain a wide thin strip material by guiding the molten or semi-solidified metal onto the moving and cooling surface, a plurality of hot water supply rods arranged in a row across the width direction are arranged to make the molten or semi-solidified state. The method for producing a wide thin strip material is characterized in that the distribution of the flow rate in the width direction injected into the moving cooling surface is controlled by adjusting the immersion depth of these hot water supply flow control rods in the metal. 【請求項２】給湯流制御桿の浸漬深さの調整を、移動冷
却面上で生成した広幅薄帯材の板厚計測に基く指令信号
によって、フィードバック制御する請求項１に記載した
広幅薄帯材の製造方法。2. The wide ribbon according to claim 1, wherein the immersion depth of the hot water supply flow control rod is feedback-controlled by a command signal based on the thickness measurement of the wide ribbon material generated on the moving cooling surface. Method of manufacturing wood.