JP2531752B2 - Quenched metal ribbon manufacturing equipment - Google Patents
Quenched metal ribbon manufacturing equipmentInfo
- Publication number
- JP2531752B2 JP2531752B2 JP63182824A JP18282488A JP2531752B2 JP 2531752 B2 JP2531752 B2 JP 2531752B2 JP 63182824 A JP63182824 A JP 63182824A JP 18282488 A JP18282488 A JP 18282488A JP 2531752 B2 JP2531752 B2 JP 2531752B2
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- nozzle
- outlet slit
- current
- stopper
- 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.)
- Expired - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/064—Accessories therefor for supplying molten metal
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） この発明は、溶融金属を急冷凝固させて連続金属薄帯
を直接製造する、急冷金属薄帯の製造装置に関するもの
である。Description: TECHNICAL FIELD The present invention relates to an apparatus for producing a quenched metal ribbon, which directly solidifies a molten metal to directly produce a continuous metal ribbon.
非晶質又は結晶質の金属薄帯を製造する代表的な方法
として、単ロール法が挙げられる。金属薄帯は、例えば
単ロール法によれば流出ノズルの出口スリットから溶融
金属を高速回転する冷却ロール上に流出させることによ
り連続的に製造される。このような急冷金属薄帯の製造
装置の出口スリットの間げきは極めて狭く、このため急
冷金属薄帯の製造操業初期に出口スリット内へ溶融金属
飛沫が飛び込み凝固してしまうと、出口スリットが部分
的又は全面的に閉塞して、いわゆるノズル詰まりが生じ
てその後の円滑な急冷金属薄帯の製造を続行することが
できなくなってしまう。A typical method for producing an amorphous or crystalline metal ribbon is a single roll method. According to the single roll method, for example, the metal ribbon is continuously produced by flowing the molten metal from the exit slit of the outflow nozzle onto a cooling roll that rotates at a high speed. The gap between the exit slits of such a device for producing quenched metal ribbons is extremely narrow.Therefore, when molten metal droplets fly into the outlet slits and solidify at the beginning of the production operation of the quenched metal ribbons, the exit slits are partially If it is blocked completely or entirely, so-called nozzle clogging occurs and it becomes impossible to continue the smooth production of the quenched metal ribbon thereafter.
このようなノズル詰まりの抑制を図る急冷金属薄帯の
製造装置につき以下述べる。An apparatus for producing a quenched metal ribbon for suppressing such nozzle clogging will be described below.
（従来の技術） ノズル詰まりによるトラブルを防止するために工業的
に流出ノズルやタンディッシュの予熱が行われている。
すなわち700〜1000℃の高温に流出ノズルやタンディッ
シュを予熱した後、流出ノズル内へ溶融金属を注入する
ことが一般的に行われてきた。しかし十分な予熱が行わ
れてきた場合でも、出口スリット内への溶融金属飛沫の
飛散、付着と、それに引き続く溶湯の流入との間に時間
遅れが生じると、ノズル詰まりに至ったのである。(Prior Art) In order to prevent troubles due to nozzle clogging, the outflow nozzle and the tundish are preheated industrially.
That is, it has been common practice to preheat the outflow nozzle and the tundish to a high temperature of 700 to 1000 ° C. and then inject the molten metal into the outflow nozzle. However, even when sufficient preheating was performed, nozzle clogging occurred when there was a time delay between the splashing and adhesion of the molten metal droplets in the exit slit and the subsequent inflow of the molten metal.
このようなノズル詰まりを防止するために、特開昭58
−122157号公報では高温度の溶融金属をタンディッシュ
に注湯して保定後、最適温度の溶融金属を注湯すること
によってタンディッシュ及びノズルの予熱不足を補償
し、また溶融金属の落下に伴なう動圧を利用する方法が
提案されている。To prevent such nozzle clogging, JP-A-58-58
In Japanese Patent No. 122157, after the molten metal having a high temperature is poured into a tundish and held, the molten metal having an optimum temperature is poured to compensate for insufficient preheating of the tundish and the nozzle, and the molten metal is dropped. A method utilizing kinetic pressure has been proposed.
しかし、実操業においては、流出ノズル内へ溶融金属
飛沫が少量飛散し、出口スリット内で凝固してノズル詰
まりになることもしばしば経験された。また、ストッパ
を開けたときに溶湯の奔出流によってパドルブレークを
生じる等、出口スリットからの流出が不安定になる問題
があった。However, in actual operation, it was often experienced that a small amount of molten metal splashes into the outflow nozzle and solidifies in the outlet slit to cause nozzle clogging. Further, when the stopper is opened, there is a problem that the outflow from the outlet slit becomes unstable, such as a paddle break caused by the outflow of molten metal.
また特開昭61−289953号公報及び特開昭61−296941号
公報では、流出ノズルの内部に多孔板を設け、溶湯流の
均一化を図る方法が提案されている。Further, JP-A-61-289953 and JP-A-61-296941 propose a method in which a perforated plate is provided inside the outflow nozzle to make the molten metal flow uniform.
しかし多孔板の貫通孔は、ストレートに出口スリット
に向かっているので流出ノズル内への少量の溶湯飛散が
ノズル詰まりをもたらす欠点は依然として残っていた。However, since the through hole of the perforated plate is straight toward the outlet slit, the drawback that a small amount of molten metal is scattered inside the outflow nozzle may cause nozzle clogging still remains.
（発明が解決しようとする課題） この発明は、上述した従来技術における問題を有利に
解決するもので、ノズル詰まりやパドルブレーク等を抑
制し、安定した急冷金属薄帯の製造を行い得る急冷金属
薄帯の製造装置を提案することを目的とする。(Problems to be Solved by the Invention) The present invention advantageously solves the above-mentioned problems in the prior art, and suppresses nozzle clogging, paddle break, etc., and enables rapid production of a quenched metal ribbon. It is an object of the present invention to propose a ribbon manufacturing apparatus.
（課題を解決するための手段） 急冷金属薄帯の製造操業初期におけるノズル詰まりの
原因は、基本的には流出ノズル内又は出口スリット内に
おける溶融金属飛沫の温度低下に他ならない。この温度
低下の理由の多くは、タンディッシュや流出ノズルへの
熱流出であるから、ノズル詰まりの防止には流出ノズル
等の予熱がすでに述べたように不可欠である。(Means for Solving the Problem) Basically, the cause of nozzle clogging in the early stage of the production operation of the quenched metal ribbon is nothing but the decrease in the temperature of the molten metal splash in the outflow nozzle or the outlet slit. Since most of the reason for this temperature decrease is heat outflow to the tundish or the outflow nozzle, preheating of the outflow nozzle or the like is indispensable for preventing nozzle clogging as already described.
しかし、流出ノズル等の予熱を行ったとしても、出口
スリットの開口部はきわめて狭いので、出口スリットに
少量の溶融金属飛沫が飛込むと、急激な温度低下となっ
て凝固し、その結果ノズル詰まりに至る傾向かあった。However, even if the outlet nozzle is preheated, the opening of the exit slit is extremely narrow, so if a small amount of molten metal splashes into the exit slit, the temperature drops rapidly and solidifies, resulting in nozzle clogging. There was a tendency to reach.
すなわち出口スリットに注入される溶融金属量がスト
ッパの開放初期に少量であることから温度低下が著しい
のであり、従って十分な量の金属溶湯が供給されるなら
ばノズル詰まりを防止することができるはずである。That is, the amount of molten metal injected into the outlet slit is small at the initial stage of opening the stopper, so that the temperature drop is remarkable. Therefore, if a sufficient amount of molten metal is supplied, nozzle clogging should be prevented. Is.
また、パドルブレークは、流出ノズル内の溶湯流が整
流化されるならば激減することができるはずである。Also, the paddle break could be drastically reduced if the melt flow in the outflow nozzle were rectified.
この発明は、ストッパーの開放初期に溶融金属の飛沫
が出口スリット内へ飛び込むことを防ぎ、大量の溶融金
属の整流状態で流出ノズルに連続的に供給させることに
より従来技術が残していた問題の解決を図るものであ
る。The present invention solves the problems left over by the prior art by preventing splashes of molten metal from jumping into the outlet slit at the initial opening of the stopper and continuously supplying a large amount of molten metal to the outflow nozzle in a rectified state. Is intended.
すなわちこの発明は、急速冷却体に面する出口スリッ
トを底壁にそなえてこの出口スリットと連なる溶湯溜め
の上方開口でストッパを介しタンディッシュと組合せた
金属溶湯の流出ノズルを有する急冷金属薄帯の製造装置
において、 並行配列した複数個の貫通孔を有してストッパの開放
により溶湯溜めに向かう金属溶湯の奔出流動に伴われる
溶融金属飛沫の出口スリット壁面への飛散付着を遮り、
また溶湯流を整流化する板状の変流部片を、この変流部
片の厚さｔ、貫通孔径ｄ及び出口スリット方向に対する
貫通孔の傾斜角度θにつき、 ｄ＜ｔ・tanθ なる関係を満足させて流出ノズルの溶湯溜め内に配置し
たことを特徴とする急冷金属薄帯の製造装置である。That is, according to the present invention, an outlet slit facing a rapid cooling body is provided on a bottom wall, and a quenching metal ribbon having an outflow nozzle for molten metal combined with a tundish through a stopper at an upper opening of a molten metal reservoir connected to the outlet slit is provided. In the manufacturing equipment, it has a plurality of through holes arranged in parallel and blocks the scattering and adhesion of molten metal droplets to the outlet slit wall surface that accompanies the rush flow of the molten metal toward the molten metal reservoir by opening the stopper,
Further, regarding the plate-shaped current-transforming piece that straightens the molten metal flow, the relationship of d <t · tanθ is established for the thickness t of the current-transforming piece, the through-hole diameter d, and the inclination angle θ of the through-hole with respect to the outlet slit direction. The quenching metal ribbon manufacturing apparatus is characterized in that the quenching metal ribbon is placed in the molten metal reservoir of the outflow nozzle.
第１図に、この発明の急冷金属薄帯の製造装置の一例
を示す。図中番号１はタンディッシュ、２はストッパ、
３は注湯パイプ、４は流出ノズル、５はノズルヒータ
ー、６は変流部片、７は出口スリット、８は冷却ロー
ル、９は溶湯溜めである。FIG. 1 shows an example of an apparatus for producing a quenched metal ribbon according to the present invention. In the figure, number 1 is a tundish, 2 is a stopper,
Reference numeral 3 is a pouring pipe, 4 is an outflow nozzle, 5 is a nozzle heater, 6 is a current changing piece, 7 is an exit slit, 8 is a cooling roll, and 9 is a molten metal reservoir.
流出ノズル４は、第２図に示すように底壁には出口ス
リット７をそなえ、この出口スリット７と連なる溶湯溜
め９内に変流部片６を配置し、溶湯溜め６の上方開口で
ストッパ２を介しタンディッシュの内部と連通する。ス
トッパ２は、溶湯溜め９の閉塞、開放を司る。As shown in FIG. 2, the outflow nozzle 4 is provided with an outlet slit 7 on the bottom wall, and a current-transforming piece 6 is arranged in a molten metal reservoir 9 connected to the outlet slit 7 and a stopper is provided at an upper opening of the molten metal reservoir 6. It communicates with the inside of the tundish through 2. The stopper 2 controls closing and opening of the molten metal reservoir 9.
ここで流出ノズル４のノズルチップ材質としては、窒
化けい素、窒化ほう素、窒化けい素、・窒化ほう素複合
体、サイアロン・窒化ほう素複合体や溶融石英などを有
利に用いることができる。また出口スリット７の間隔
は、0.3〜1.5mm程度を選ぶことができる。Here, as the nozzle tip material of the outflow nozzle 4, silicon nitride, boron nitride, silicon nitride, a boron nitride composite, a sialon / boron nitride composite, fused quartz, or the like can be advantageously used. The interval between the exit slits 7 can be selected to be about 0.3 to 1.5 mm.
（作 用） この発明では流出ノズル４の溶湯溜め９内に変流部片
６を配置したことが特徴である。この変流部片６は、耐
熱性を有する多くのセラミックスを使用することがで
き、例えば窒化けい素、ムライト、石英、コージェライ
ト等を用いることが好適であり、不規則なオープンポア
の多孔質成形体よりなるものでも良いが、この発明では
特に、変流部片６の厚み方向にほぼ真っ直ぐに並行配列
した貫通セル構造のものをより有利な手段として用い
る。(Operation) The present invention is characterized in that the current-changing piece 6 is arranged in the molten metal reservoir 9 of the outflow nozzle 4. This current-change piece 6 can be made of many heat-resistant ceramics, for example, silicon nitride, mullite, quartz, cordierite or the like is preferable, and irregular open-pore porous material. Although it may be formed of a molded body, in the present invention, in particular, a through-cell structure having substantially straight parallel arrangement in the thickness direction of the current transformer portion 6 is used as a more advantageous means.
この変流部片６の貫通孔は、溶湯溜め９に向かう金属
溶湯の奔出流動に伴い溶融金属飛沫が出口スリット７壁
面へ飛散付着するのを遮るために、出口スリット７方向
に対して直線的でないことが必要であり、例えば第１図
に示したように、変流部片６の並行配列した貫通孔の向
きを出口スリット７の方向に対して一定角度以上に傾斜
させる。この傾斜角度θは、変流部片６の厚さｔが大き
いほど、また貫通孔径すなわちセルサイズｄが小さいほ
ど小さな角度でも効果的に作用する。すなわちｄ＜ｔ・
tanθの条件を満足させることによって、溶融金属飛沫
は変流部片６の上面又は貫通孔の側面に付着するため、
その結果直接出口スリット７に向かって飛散付着するの
を回避できるのである。The through-hole of the current-changing piece 6 is a straight line in the direction of the outlet slit 7 in order to prevent the molten metal droplets from splashing and adhering to the wall surface of the outlet slit 7 as the molten metal flows toward the molten metal reservoir 9. For example, as shown in FIG. 1, the direction of the through holes in which the current-changing part pieces 6 are arranged in parallel is inclined at a certain angle or more with respect to the direction of the outlet slit 7. This inclination angle θ works effectively even with a smaller angle as the thickness t of the current transformer portion 6 increases and as the through hole diameter, that is, the cell size d decreases. That is, d <t
By satisfying the condition of tan θ, since the molten metal splash adheres to the upper surface of the current-changing part 6 or the side surface of the through hole,
As a result, it is possible to avoid scattering and adhesion directly toward the outlet slit 7.
第３図に、変流部片６の貫通セルの開口形状の例を示
す。変流部片６の有効寸法は、セルのサイズと開口率
（開口面積率で定義される）とによって定義され、変流
部片６の寸法は、予熱温度や溶融金属の粘性、介在物の
多少等を考慮して任意に選択することができる。例え
ば、Fe−Ｂ−Si系非晶質薄帯を製造する場合、変流部片
６の寸法としてセルサイズ2mm、開口率70％でノズル詰
まりもなく、安定した急冷金属薄帯の製造操業を行うこ
とができた。FIG. 3 shows an example of the opening shape of the through cell of the current-changing part 6. The effective size of the current-changing piece 6 is defined by the size of the cell and the opening ratio (defined by the opening area ratio), and the size of the current-changing piece 6 depends on the preheating temperature, the viscosity of the molten metal, and the inclusions. It can be arbitrarily selected in consideration of some or the like. For example, in the case of producing an Fe-B-Si-based amorphous ribbon, the size of the current-changing piece 6 is 2 mm, the aperture ratio is 70%, the nozzle is not clogged, and a stable quenching metal ribbon production operation is performed. I was able to do it.
このようにこの発明では、変流部片６を設置すること
によって溶融金属飛沫が直接出口スリット７に飛散付着
するのを回避するのでノズル詰まりを抑制できまた出口
スリット７に向かう溶湯流が整流されるので出口スリッ
ト７上での溶湯揺動もほとんど無くなり、ストッパ２の
開放初期に発生が懸念されるノズル・ロール間でのパド
ルブレークを解消することができ、その結果安定した急
冷金属薄帯の製造操業が行われるようになる。As described above, in the present invention, since the molten metal droplets are prevented from directly scattering and adhering to the outlet slit 7 by installing the current-changing piece 6, nozzle clogging can be suppressed, and the molten metal flow toward the outlet slit 7 is rectified. Since the swinging of the molten metal on the outlet slit 7 is almost eliminated, the paddle break between the nozzle and the roll, which may occur during the initial opening of the stopper 2, can be eliminated, and as a result, a stable quenched metal ribbon can be formed. Manufacturing operations will begin.
（実施例） Fe77Mn1B10Si12の組成（原子％）になる合金を高周波
誘導溶解炉で溶解し、溶湯温度を1310℃に保持した。こ
の溶湯を第１図に示した急冷金属薄帯の製造装置の約10
00℃に予熱したタンディッシュ１（寸法:400mm径）内に
注ぎ、タンディッシュ１内の溶湯重量が20kgを超過した
時点でストッパ２を引上げ、溶湯を約1350℃に予熱した
流出ノズル４内に一気に注入し、ムライト製の変流部片
６（セル開口形状正方形、セルサイズ1.5mm、開口率70
％、厚さ10mm、傾斜角20゜）を通過させた。その結果、
溶湯は顕著に整流化され、出口スリット７（間隔0.6m
m）へは滑らかな溶湯流が連続的に供給され、ノズル詰
まりは生じなかった。また、出口スリット７から急冷ロ
ール８上に流出した溶湯流は、0.4mmのノズル・ロール
間ギヤップ内でパドルブレークを生じることなく、安定
した操業が行われた。(Example) An alloy having a composition (atomic%) of Fe 77 Mn 1 B 10 Si 12 was melted in a high frequency induction melting furnace and the temperature of the molten metal was kept at 1310 ° C. Approximately 10% of this molten metal was used in the quenching metal ribbon manufacturing equipment shown in Fig. 1.
Pour it into the tundish 1 (dimensions: 400 mm diameter) preheated to 00 ° C, pull up the stopper 2 when the weight of the molten metal in the tundish 1 exceeds 20 kg, and put it into the outflow nozzle 4 preheated to approximately 1350 ° C. Inject all at once, and make a mullite current-changing piece 6 (cell opening shape square, cell size 1.5 mm, opening ratio 70
%, Thickness 10 mm, inclination angle 20 °). as a result,
The molten metal is remarkably rectified, and the exit slit 7 (spacing 0.6 m
A smooth molten metal stream was continuously supplied to m), and nozzle clogging did not occur. Further, the molten metal flow flowing out from the exit slit 7 onto the quenching roll 8 was operated stably without causing a paddle break in the 0.4 mm nozzle-roll gap.
（発明の効果） この発明の急冷金属薄帯の製造装置は、溶湯溜め内に
変流部片を配置することにより、ノズル詰まりやパドル
ブレークの発生なしに、円滑な急冷金属薄帯の製造が可
能となる。(Effect of the Invention) The apparatus for producing a quenched metal ribbon according to the present invention, by disposing the current-transforming piece in the molten metal reservoir, enables the smooth production of the quenched metal ribbon without causing nozzle clogging or paddle break. It will be possible.
第１図は、この発明に従う急冷金属薄帯の製造装置の断
面図、 第２図は、流出ノズルを示す図、 第３図は変流部片の平面図である。 １……タンディッシュ、２……ストッパ ３……注湯パイプ、４……流出ノズル ５……ノズルヒータ、６……変流部片 ７……出口スリット、８……冷却ロール ９……溶湯溜めFIG. 1 is a sectional view of an apparatus for producing a quenched metal ribbon according to the present invention, FIG. 2 is a view showing an outflow nozzle, and FIG. 3 is a plan view of a current-transforming piece. 1 ... Tundish, 2 ... Stopper 3 ... Molten pipe, 4 ... Outflow nozzle 5 ... Nozzle heater, 6 ... Current-changing piece 7 ... Exit slit, 8 ... Cooling roll 9 ... Molten pool
Claims (1)
そなえてこの出口スリットと連なる溶湯溜めの上方開口
でストッパを介しタンディッシュと組合せた金属溶湯の
流出ノズルを有する急冷金属薄帯の製造装置において、 並行配列した複数個の貫通孔を有してストッパの開放に
より溶湯溜めに向かう金属溶湯の奔出流動に伴われる溶
融金属飛沫の出口スリット壁面への飛散付着を遮り、ま
た溶湯流を整流化する板状の変流部片を、この変流部片
の厚さｔ、貫通孔径ｄ及び出口スリット方向に対する貫
通孔の傾斜角度θにつき、 ｄ＜ｔ・tanθ なる関係を満足させて流出ノズルの溶湯溜め内に配置し
たことを特徴とする急冷金属薄帯の製造装置。1. A quenching metal ribbon having an outlet slit facing the rapid cooling body on the bottom wall and having an outflow nozzle for molten metal combined with a tundish via a stopper at the upper opening of the molten metal reservoir connected to this outlet slit. In the manufacturing equipment, it has a plurality of through holes that are arranged in parallel and prevents the molten metal droplets from splashing and adhering to the outlet slit wall surface that accompanies the expelled flow of the molten metal toward the molten metal reservoir when the stopper is opened. A plate-shaped current-transforming piece for rectifying is satisfied such that the thickness t of the current-transforming piece, the diameter d of the through-hole, and the inclination angle θ of the through-hole with respect to the exit slit direction satisfy the relationship of d <t · tanθ. An apparatus for producing a quenched metal ribbon, which is arranged in a molten metal reservoir of an outflow nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63182824A JP2531752B2 (en) | 1988-07-23 | 1988-07-23 | Quenched metal ribbon manufacturing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63182824A JP2531752B2 (en) | 1988-07-23 | 1988-07-23 | Quenched metal ribbon manufacturing equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0234258A JPH0234258A (en) | 1990-02-05 |
| JP2531752B2 true JP2531752B2 (en) | 1996-09-04 |
Family
ID=16125104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63182824A Expired - Fee Related JP2531752B2 (en) | 1988-07-23 | 1988-07-23 | Quenched metal ribbon manufacturing equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2531752B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112387945A (en) * | 2019-08-15 | 2021-02-23 | 河南中岳非晶新型材料股份有限公司 | Integrated package pasting process for amorphous nanocrystalline strip |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6376742A (en) * | 1986-09-18 | 1988-04-07 | Nippon Steel Corp | Nozzle for producing metallic strip |
-
1988
- 1988-07-23 JP JP63182824A patent/JP2531752B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0234258A (en) | 1990-02-05 |
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