JPH0575802B2 - - Google Patents

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Publication number
JPH0575802B2
JPH0575802B2 JP6697889A JP6697889A JPH0575802B2 JP H0575802 B2 JPH0575802 B2 JP H0575802B2 JP 6697889 A JP6697889 A JP 6697889A JP 6697889 A JP6697889 A JP 6697889A JP H0575802 B2 JPH0575802 B2 JP H0575802B2
Authority
JP
Japan
Prior art keywords
alloy
cooling drum
molten
pouring nozzle
flakes
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
Application number
JP6697889A
Other languages
Japanese (ja)
Other versions
JPH02247306A (en
Inventor
Rikuhiro Komya
Kazuyuki Tashiro
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP6697889A priority Critical patent/JPH02247306A/en
Publication of JPH02247306A publication Critical patent/JPH02247306A/en
Publication of JPH0575802B2 publication Critical patent/JPH0575802B2/ja
Granted legal-status Critical Current

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Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、不活性雰囲気中でNd合金溶湯を冷
却ドラムの外周面に噴射させて急冷・凝固し、フ
レークを製造する際、注湯ノズルの噴出口に付着
した地金を除去する装置に関する。
[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a method for producing flakes by injecting molten Nd alloy onto the outer peripheral surface of a cooling drum in an inert atmosphere to rapidly cool and solidify it. The present invention relates to a device for removing metal attached to the spout of a jet.

〔従来の技術〕[Conventional technology]

溶融金属を急冷凝固して金属薄帯を製造する方
法は、非晶質合金の開発を契機として利点が注目
され、新しい材料の開発のための手段として脚光
を浴びている。この急冷凝固法による金属薄帯の
製造技術は、高温の溶融物質を高速回転している
冷却ドラムの外周面に吹き付けて急冷し、非晶質
或いはそれに近い結晶質の材料を製造するもので
ある。この技術によるとき、機械加工が困難な、
たとえば冷間圧延が不可能な材料の薄帯を溶融金
属から直接的に得ることができる。また、通常の
冷却手段では不可能な高温相の非晶質化を室温で
実現することができる。
BACKGROUND ART The method of producing metal ribbon by rapidly solidifying molten metal has attracted attention for its advantages following the development of amorphous alloys, and is now in the spotlight as a means for developing new materials. This technology for producing metal ribbon using the rapid solidification method involves spraying a high-temperature molten material onto the outer surface of a cooling drum that is rotating at high speed and rapidly cooling it to produce an amorphous or near-crystalline material. . When using this technology, machining is difficult.
For example, ribbons of materials that cannot be cold rolled can be obtained directly from molten metal. Furthermore, it is possible to transform a high-temperature phase into an amorphous state at room temperature, which is impossible with ordinary cooling means.

他方、Nd−Fe−B系永久磁石を急冷凝固法に
よつて製造する技術として、特開昭57−210934号
公報、特開昭60−9852号公報等で紹介された方法
がある。また、同様な方法が、大学、企業等の研
究成果として多数報告されている。しかし、従来
の技術は、いずれも少量の合金を石英坩堝中で溶
解し、急冷凝固させる実験室規模のものである。
On the other hand, as a technique for manufacturing Nd--Fe--B permanent magnets by the rapid solidification method, there are methods introduced in Japanese Patent Application Laid-open Nos. 57-210934 and 60-9852. In addition, many similar methods have been reported as research results by universities, companies, etc. However, all of the conventional techniques are laboratory-scale, in which a small amount of alloy is melted in a quartz crucible and rapidly solidified.

そこで、本発明者等は、第3図に示す設備構成
をもつた装置を開発し、注湯容器に関する提案を
特願昭63−333829号で行つた。この装置において
は、装置本体31の内部を溶解室32とフレーク
化室33とに区分し、それぞれ真空排気装置34
に接続している。溶解室32には、高周波コイル
35を備えた溶解容器36が傾動可能に配置され
ている。
Therefore, the present inventors developed an apparatus having the equipment configuration shown in FIG. 3, and proposed a pouring container in Japanese Patent Application No. 333829/1983. In this device, the inside of the device main body 31 is divided into a melting chamber 32 and a flaking chamber 33, and a vacuum exhaust device 34 is used for each.
is connected to. A melting container 36 equipped with a high-frequency coil 35 is tiltably arranged in the melting chamber 32 .

溶解室32とフレーク化室33とを仕切る仕切
り壁37にはベローズ38が装着されており、こ
のベローズ38に漏斗39及び注湯容器40が取
り付けられる。注湯容器40の下端には注湯ノズ
ル41が設けられており、注湯容器40本体及び
注湯のノズル41それぞれを所定温度に保持する
ための高周波コイル42が周囲に配置されてい
る。なお、高周波コイル42による注湯容器40
の加熱を効率良く行うため、注湯容器40と高周
波コイル42との間に黒鉛ブロツク43が介在さ
れている。また、黒鉛ブロツク43と高周波コイ
ル42との間に外坩堝45を配置して、注湯容器
40を支持する。
A bellows 38 is attached to a partition wall 37 that partitions the melting chamber 32 and the flaking chamber 33, and a funnel 39 and a pouring container 40 are attached to the bellows 38. A pouring nozzle 41 is provided at the lower end of the pouring container 40, and a high frequency coil 42 for maintaining the main body of the pouring container 40 and the pouring nozzle 41 at a predetermined temperature is arranged around it. Note that the pouring container 40 by the high frequency coil 42
A graphite block 43 is interposed between the pouring container 40 and the high-frequency coil 42 in order to heat the melt efficiently. Further, an outer crucible 45 is disposed between the graphite block 43 and the high frequency coil 42 to support the pouring container 40.

溶解容器36で所定量のNd−Fe−B系合金原
料を溶解した後、溶解容器36を傾動させること
によつて、Nd合金の溶湯44を溶解容器36か
ら漏斗39を介して注湯容器40に移し替える。
なお、溶解室32の内部は、溶解室扉46の開閉
によつて開放又は封止される。
After melting a predetermined amount of Nd-Fe-B alloy raw material in the melting container 36, by tilting the melting container 36, the molten Nd alloy 44 is poured from the melting container 36 through the funnel 39 into the pouring container 40. Transfer to.
Note that the inside of the dissolution chamber 32 is opened or sealed by opening and closing the dissolution chamber door 46.

注湯容器40に供給された溶湯44は、注湯容
器40底部にある注湯ノズル41から冷却ドラム
47の外周面に吹き付けられる。溶湯44は、冷
却ドラム47の外周面上でパドル48を形成し、
冷却ドラム47を介した抜熱によつてフレーク4
9として飛翔する。このフレーク49が、ダクト
50を経てフレーク室51に集められる。なお、
冷却ドラム47による溶湯44の冷却を均一に行
うため、パドル48形成位置の上流側に研磨ロー
ル52及びブラシロール53を設けている。
The molten metal 44 supplied to the pouring container 40 is sprayed onto the outer peripheral surface of the cooling drum 47 from the pouring nozzle 41 located at the bottom of the pouring container 40 . The molten metal 44 forms a puddle 48 on the outer peripheral surface of the cooling drum 47,
The flakes 4 are removed by removing heat through the cooling drum 47.
Fly as 9. The flakes 49 are collected in a flake chamber 51 via a duct 50. In addition,
In order to uniformly cool the molten metal 44 by the cooling drum 47, a polishing roll 52 and a brush roll 53 are provided upstream of the position where the paddle 48 is formed.

フレーク室51に集められたフレーク49は、
粒鉄を除去した後、所定のサイズに粉砕されて、
磁石材料となる。
The flakes 49 collected in the flake chamber 51 are
After removing the granulated iron, it is crushed to a predetermined size.
Becomes magnetic material.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

ところで、Nd合金溶湯は、粘性の大きな材料
である。また、注湯ノズル41から噴射された
Nd合金溶湯は、その保有熱を周囲の雰囲気に放
散し降温する。この降温に伴つてNd合金溶湯の
粘性が一層大きくなり、噴出口の周囲に地金とな
つて付着・成長する。この地金付着によつて、注
湯ノズル41の噴出口が閉塞し、噴射流の勢いが
弱くなる。また、地金付着量が少ない段階におい
ても、噴射流の周囲が冷却されて鞘状の薄皮が生
じ、噴射流の流動状態が不安定になる。
By the way, molten Nd alloy is a highly viscous material. In addition, the molten metal injected from the pouring nozzle 41
The molten Nd alloy dissipates its retained heat into the surrounding atmosphere and cools down. As the temperature decreases, the viscosity of the molten Nd alloy increases further, and it adheres and grows as base metal around the spout. Due to this metal adhesion, the spout of the pouring nozzle 41 is blocked, and the force of the jet flow is weakened. Furthermore, even when the amount of metal deposited is small, the area around the jet stream is cooled and a sheath-like thin skin is formed, making the flow state of the jet stream unstable.

更に、噴射流が強すぎるとき、冷却ドラム47
の外周面から跳ね上がつたスプラツシユがノズル
底面に当たつて堆積し、ノズル底面から雫状に落
下し、ツララとして成長する。逆に、勢いの弱い
噴射流が冷却ドラム47の外周面に当たると、パ
ドル48を形成せずに跳ね飛ばされて、同様にノ
ズル底面に堆積する。更に、噴射流が正常であつ
ても冷却ドラム47の外周面の清浄化が不充分な
場合、フレークの片や金属粒がドラム表面に付着
し易くなる。この付着物の上に溶湯が噴射される
と、パドルを形成せず、やはり跳ね飛ばされてノ
ズル底面に雫を作り、ツララ状になる。
Furthermore, when the jet flow is too strong, the cooling drum 47
Splash that jumps up from the outer circumferential surface of the nozzle hits the bottom of the nozzle, accumulates, falls from the bottom of the nozzle in the form of drops, and grows as icicles. On the other hand, when a weak jet stream hits the outer circumferential surface of the cooling drum 47, it is blown away without forming a puddle 48, and similarly deposits on the bottom surface of the nozzle. Further, even if the jet flow is normal, if the outer circumferential surface of the cooling drum 47 is insufficiently cleaned, flakes and metal particles are likely to adhere to the drum surface. When molten metal is injected onto this deposit, it does not form a puddle, but instead is blown away, creating drops on the bottom of the nozzle, resulting in an icicle-like appearance.

このようなことから、噴出口を通過するNd合
金溶湯流の流量や太さが不規則に変化し、冷却ド
ラム47に対する接触状態及び冷却条件が不安定
になる。その結果、一定した品質をもつフレーク
が製造されなくなる。たとえば、地金付着により
噴出口の有効径が小さくなり、冷却ドラム47に
供給される流量が低減すると、供給されたNd合
金溶湯に対する冷却ドラム47の冷却作用が相対
的に大きくなり、Nd合金溶湯が過冷却され、ア
モルフアス状態になることもある。また、注湯ノ
ズル41からの溶湯流に乱れが生じるので、冷却
ドラム47の外周面で飛散する割合が大きくな
る、Nd−Fe−B系永久磁石製造用原料としては
不向きな粒鉄が多量に発生する。
For this reason, the flow rate and thickness of the Nd alloy molten metal flow passing through the jetting port vary irregularly, and the contact state and cooling conditions with respect to the cooling drum 47 become unstable. As a result, flakes of consistent quality are not produced. For example, if the effective diameter of the spout becomes smaller due to metal adhesion and the flow rate supplied to the cooling drum 47 is reduced, the cooling effect of the cooling drum 47 on the supplied molten Nd alloy becomes relatively large, and the molten Nd alloy may become supercooled and become amorphous. In addition, since turbulence occurs in the flow of the molten metal from the pouring nozzle 41, a large amount of granulated iron, which is unsuitable as a raw material for manufacturing Nd-Fe-B permanent magnets, is scattered on the outer peripheral surface of the cooling drum 47. Occur.

そこで、本発明は、注湯ノズルの噴出口周辺に
付着しがちな地金を定期的に除去することによつ
て、常に安定した溶湯流としてNd合金溶湯を冷
却ドラムの外周面に供給し、安定した品質をもつ
フレークを高い歩留りで製造することを目的とす
る。
Therefore, the present invention supplies molten Nd alloy to the outer peripheral surface of the cooling drum as a constant stream of molten metal by periodically removing the bare metal that tends to adhere to the vicinity of the spout of the pouring nozzle. The purpose is to produce flakes with stable quality at a high yield.

〔課題を解決するための手段〕[Means to solve the problem]

本発明の地金除去装置は、その目的を達成する
ため、不活性雰囲気中で冷却ドラムの外周面に、
多数の噴出口を直線状に配列した注湯ノズルから
Nd合金溶湯を噴射させてフレークを製造する装
置において、前記注湯ノズルと前記冷却ドラムの
外周面との間に、前記噴出口の配列方向に沿つて
進退する掻き棒を設けたことを特徴とする。
In order to achieve the purpose, the ingot metal removal device of the present invention applies
From a pouring nozzle with many spouts arranged in a straight line.
The apparatus for manufacturing flakes by injecting molten Nd alloy is characterized in that a scraper is provided between the pouring nozzle and the outer circumferential surface of the cooling drum, the scraper moving forward and backward along the direction in which the spouting ports are arranged. do.

〔作用〕[Effect]

本発明の地金除去装置においては、第1図に示
すように注湯ノズル1と冷却ドラム2との間に、
掻き棒3を設けている。掻き棒3は、たとえば前
後進ロツド4に連結されており、この前後進ロツ
ド4が槽壁5に設けられたシリンダ6内に挿入さ
れている。そして、シリンダ6の両端に開口した
給・排気孔7a,7bの何れか一方に窒素N2
の不活性ガスを給気又は排気することによつて、
前後進ロツド4を前後進させ、注湯ノズル1と冷
却ドラム2との間で掻き棒3を進退させる。掻き
棒3は、第2図の平面図で示すように、先端部が
鈎型になつており、この鈎型先端部8が注湯ノズ
ル1に穿設した噴出口9に臨む。
In the metal removal apparatus of the present invention, as shown in FIG. 1, between the pouring nozzle 1 and the cooling drum 2,
A scraper 3 is provided. The scraping rod 3 is connected, for example, to a reciprocating rod 4, which is inserted into a cylinder 6 provided in the tank wall 5. Then, by supplying or exhausting an inert gas such as nitrogen N 2 to either one of the supply/exhaust holes 7a and 7b opened at both ends of the cylinder 6,
A back-and-forth movement rod 4 is moved back and forth to move a scraping rod 3 back and forth between a pouring nozzle 1 and a cooling drum 2. As shown in the plan view of FIG. 2, the scraping rod 3 has a hook-shaped tip, and this hook-shaped tip 8 faces a spout 9 formed in the pouring nozzle 1.

注湯ノズル1から冷却ドラム2の外周面にNd
合金溶湯10を噴出させると、Nd合金溶湯10
は、当初は整流11として供給される。しかし、
この噴出を継続していくと、注湯ノズル1から出
たNd合金溶湯10が雰囲気に触れて放熱し、一
部が冷却ドラム2に至る前に凝固する。凝固した
Nd合金溶湯10は、噴出口9の周囲にツララ1
2としてぶら下がる。このツララ12が生じる
と、噴出口9の有効内径が小さくなり、冷却ドラ
ム2に供給される溶湯流量が変動することは勿
論、溶湯流が乱流状態になる。更に、ツララ12
が成長すると、噴出口9を閉塞し、Nd合金溶湯
10の供給が止まる。また、フレークの飛翔に障
害となることもある。
Nd is applied from the pouring nozzle 1 to the outer peripheral surface of the cooling drum 2.
When the molten alloy 10 is spouted, the molten Nd alloy 10
is initially supplied as rectifier 11. but,
As this spouting continues, the molten Nd alloy 10 discharged from the pouring nozzle 1 comes into contact with the atmosphere and radiates heat, and a portion of the molten metal 10 solidifies before reaching the cooling drum 2. solidified
The molten Nd alloy 10 has icicles 1 around the spout 9.
Hanging as 2. When this icicle 12 occurs, the effective inner diameter of the jet nozzle 9 becomes smaller, and not only the flow rate of the molten metal supplied to the cooling drum 2 fluctuates, but also the flow of the molten metal becomes turbulent. In addition, icicle 12
When it grows, it closes the spout 9 and the supply of the molten Nd alloy 10 is stopped. Moreover, it may become an obstacle to the flight of flakes.

そこで、ツララ12の発生状況を適宜の光学的
測定器で検出し、ツララ12が所定の大きさを超
えて成長したとき、掻き棒3を前後進させる。こ
のツララ12は、Nd合金溶湯10が凝固し直後
の未だ軟らかいシヤーベツト状であるため、僅か
な力によつて注湯ノズル1から分離され、噴出口
9周辺を初期状態にすることができる。なお、掻
き棒3の前後進は、ツララ12発生状況を観察す
ることなく、定期的に行つてもよい。
Therefore, the occurrence of the icicles 12 is detected using a suitable optical measuring device, and when the icicles 12 have grown beyond a predetermined size, the scraping rod 3 is moved back and forth. Since this icicle 12 is in the form of a still soft shear bed immediately after the molten Nd alloy 10 has solidified, it is separated from the pouring nozzle 1 by a slight force, and the area around the spout 9 can be brought to an initial state. Note that the scraping rod 3 may be moved back and forth periodically without observing the occurrence of icicles 12.

このようにして、噴出口9の周辺がツララ12
のない状態に維持されるため、Nd合金溶湯10
は、噴出口9から冷却ドラム2の外周面に一定し
た太さを持つた整流11として噴射される。その
ため、冷却ドラム2外周面での冷却条件が安定化
し、結晶粒径の揃つたフレークが得られる。その
結果、Nd−Fe−B系永久磁石材料として使用さ
れるフレークの歩留りが向上する。
In this way, the area around the spout 9 becomes icicle 12.
Since the Nd alloy molten metal is maintained in a state free of
is injected from the jet port 9 onto the outer peripheral surface of the cooling drum 2 as a rectified flow 11 having a constant thickness. Therefore, the cooling conditions on the outer circumferential surface of the cooling drum 2 are stabilized, and flakes with uniform crystal grain sizes can be obtained. As a result, the yield of flakes used as the Nd-Fe-B permanent magnet material is improved.

〔実施例〕〔Example〕

温度1430℃に保持したNd合金溶湯10を、孔
径0.9mmの噴出口9を直線状に15個設けた注湯ノ
ズル1(長さ135mm、噴出口9のピツチ8mm)か
ら、流量8.1Kg/分の割合で冷却ドラム2に噴射
した。そして、注湯ノズル1と冷却ドラム2との
間を観察しながら、注湯ノズル1からぶら下がつ
たツララ12が大きくなつたときに、掻き棒3を
注湯ノズル1の端から端まで0.75秒/サイクルの
早さで移動させた。
The Nd alloy molten metal 10 maintained at a temperature of 1430°C was poured into a pouring nozzle 1 (length 135 mm, pitch of the spout ports 9 8 mm) having 15 straight spout ports 9 with a hole diameter of 0.9 mm at a flow rate of 8.1 Kg/min. It was injected onto the cooling drum 2 at a rate of . Then, while observing the space between the pouring nozzle 1 and the cooling drum 2, when the icicle 12 hanging from the pouring nozzle 1 becomes large, move the scraper 3 from one end of the pouring nozzle 1 to the other by 0.75 mm. Moved at a rate of seconds/cycle.

このようにツララ12を除去しながらNd合金
溶湯10を急冷・凝固したところ、比重6.0g/
cm3のボンド磁石として(BH)nax10.1MGOeの磁
気特性をもつNd−Fe−B系永久磁石用材として
使用されるフレークが、Nd合金原料を基準とす
る歩留り90.3%の割合で製造された。これに対
し、ツララ12の除去を行わないでNd合金溶湯
10を冷却ドラム2に噴出させたとき、1分25秒
後に一部の噴出口9が閉塞した。また、粒鉄、ア
モルフアス組織をもつたフレーク等が生成され、
同じく比重6.0g/cm2のボンド磁石として(BH)n
ax9.0MGOeの磁気特性をもつNd−Fe−B系永久
磁石用材料として使用されるフレークの歩留りは
83.4%であり、特性、歩留り共に低いものであつ
た。
When the molten Nd alloy 10 was rapidly cooled and solidified while removing the icicles 12 in this way, the specific gravity was 6.0 g/
Flakes used as a material for Nd-Fe-B permanent magnets having magnetic properties of (BH) nax 10.1MGOe as bonded magnets of cm 3 were produced at a yield rate of 90.3% based on Nd alloy raw materials. On the other hand, when the molten Nd alloy 10 was ejected onto the cooling drum 2 without removing the icicles 12, some of the ejection ports 9 were blocked after 1 minute and 25 seconds. In addition, granular iron, flakes with an amorphous structure, etc. are generated,
As a bonded magnet with a specific gravity of 6.0g/cm 2 (BH) n
The yield of flakes used as material for Nd-Fe-B permanent magnets with magnetic properties of ax 9.0MGOe is
It was 83.4%, which was low in both properties and yield.

〔発明の効果〕〔Effect of the invention〕

以上に説明したように、本発明においては、粘
性の高いNd合金溶湯を噴出させて急冷・凝固し
フレークを製造するとき、注湯ノズルの噴出口周
辺に生じるツララを除去しながら、Nd合金溶湯
を冷却ドラムの外周面に噴射させている。そのた
め、噴出口が閉塞したり、冷却ドラムに対する溶
湯流の流れが乱れたりすることなく、一定した太
さをもつ整流としてNd合金溶湯が供給される。
したがつて、冷却ドラム外周面におけるNd合金
の冷却条件が安定化し、一定した品質をもつフレ
ークが製造され、磁気特性(BH)naxの高いNd−
Fe−B系永久磁石用に使用される歩留りが向上
する。
As explained above, in the present invention, when producing flakes by spouting highly viscous molten Nd alloy and rapidly cooling and solidifying, the molten Nd alloy is is injected onto the outer peripheral surface of the cooling drum. Therefore, the Nd alloy molten metal is supplied as a rectified stream with a constant thickness without clogging the spout or disrupting the flow of the molten metal to the cooling drum.
Therefore, the cooling conditions for the Nd alloy on the outer peripheral surface of the cooling drum are stabilized, flakes with consistent quality are produced, and Nd− alloy with high magnetic properties (BH) nax is produced.
The yield of Fe-B permanent magnets is improved.

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

第1図は噴出口周辺に出来たツララを掻き棒で
除去している状態を示し、第2図はその要部を示
す平面図であり、第3図はNd合金フレークを製
造する装置全体を示した図である。 1:注湯ノズル、2:冷却ドラム、3:掻き
棒、4:前後進ロツド、5:槽壁、6:シリン
ダ、7a,7b:給・排気孔、8:鈎型先端部、
9:噴出口、10:Nd合金溶湯、11:整流、
12:ツララ。
Figure 1 shows how icicles formed around the spout are being removed with a scraper, Figure 2 is a plan view showing the main parts, and Figure 3 shows the entire apparatus for producing Nd alloy flakes. FIG. 1: Pouring nozzle, 2: Cooling drum, 3: Scraping rod, 4: Back and forth rod, 5: Tank wall, 6: Cylinder, 7a, 7b: Supply/exhaust hole, 8: Hook-shaped tip,
9: Spout nozzle, 10: Nd alloy molten metal, 11: Rectification,
12: Icicles.

Claims (1)

【特許請求の範囲】[Claims] 1 不活性雰囲気中で冷却ドラムの外周面に、多
数の噴出口を直線状に配列した注湯ノズルから
Nd合金溶湯を噴射させてフレークを製造する装
置において、前記注湯ノズルと前記冷却ドラムの
外周面との間に、前記噴出口の配列方向に沿つて
進退する掻き棒を設けたことを特徴とするNd合
金注湯用ノズルの地金除去装置。
1. Molten metal is poured from a pouring nozzle with a large number of spouts arranged in a straight line on the outer circumferential surface of the cooling drum in an inert atmosphere.
The apparatus for manufacturing flakes by injecting molten Nd alloy is characterized in that a scraper is provided between the pouring nozzle and the outer circumferential surface of the cooling drum, the scraper moving forward and backward along the direction in which the spouting ports are arranged. Metal removal device for Nd alloy pouring nozzle.
JP6697889A 1989-03-17 1989-03-17 Device for removing metal for nozzle charging nd alloy Granted JPH02247306A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6697889A JPH02247306A (en) 1989-03-17 1989-03-17 Device for removing metal for nozzle charging nd alloy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6697889A JPH02247306A (en) 1989-03-17 1989-03-17 Device for removing metal for nozzle charging nd alloy

Publications (2)

Publication Number Publication Date
JPH02247306A JPH02247306A (en) 1990-10-03
JPH0575802B2 true JPH0575802B2 (en) 1993-10-21

Family

ID=13331622

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6697889A Granted JPH02247306A (en) 1989-03-17 1989-03-17 Device for removing metal for nozzle charging nd alloy

Country Status (1)

Country Link
JP (1) JPH02247306A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002030595A1 (en) * 2000-10-06 2002-04-18 Santoku Corporation Process for producing, through strip casting, raw alloy for nanocomposite type permanent magnet
JP3602120B2 (en) 2002-08-08 2004-12-15 株式会社Neomax Manufacturing method of quenched alloy for nanocomposite magnet
CN1805071A (en) * 2002-08-08 2006-07-19 株式会社新王磁材 Method of making rapidly solidified alloy for magnet

Also Published As

Publication number Publication date
JPH02247306A (en) 1990-10-03

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