JPS59166606A - Preparation of amorphous metal fine powder - Google Patents
Preparation of amorphous metal fine powderInfo
- Publication number
- JPS59166606A JPS59166606A JP3894283A JP3894283A JPS59166606A JP S59166606 A JPS59166606 A JP S59166606A JP 3894283 A JP3894283 A JP 3894283A JP 3894283 A JP3894283 A JP 3894283A JP S59166606 A JPS59166606 A JP S59166606A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- powder
- metal
- amorphous metal
- amorphous
- 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.)
- Pending
Links
Abstract
Description
【発明の詳細な説明】 この発明は非晶質金属微粉末の製造方法に係る。[Detailed description of the invention] The present invention relates to a method for producing amorphous metal fine powder.
非晶質金属粉末は耐食材料、高強度高靭性材料、軟磁性
材料等の原料に用いられるほか触媒等に使用され、最近
その用途が拡大されつつある。その製造方法としては溶
融金属を霧状にしたのち冷却液によって冷却して急速凝
固させ粉末とする方法、或いはリボン状の非晶質金属を
機械的に粉砕する方法等が提案されている。しかしなが
ら、冷却液によって冷却する前者の方法では得られる冷
却速度には限界があるので、非晶質粉末とすることので
きる金属の化学組成は狭い範囲に限られる上に、大きな
粒子は非晶質になシ難い。後者の方法では非晶質金属特
有の大きな靭性のため粉砕が容易でない等の問題がある
。この後者の問題点を解決するため粉砕に先立って、非
晶質金属が結晶質に転移する温度（以下転位温度という
）とその温度よ９２５０℃下の温度との範囲内に加熱し
て脆化させ粉砕を容易にする方法Ｃ特開昭５５−１２８
５０６号）や、粉砕に先立って転位温度よシ低い温度で
水素をチャージさせて脆化させ粉砕を容易にする方法（
特開昭５６−８７６１０号）が提案されている。特開昭
５５−１２８５０６号の方法で得られる非晶質金属粉は
転位温度に近づける熱処理を施して構造緩和させる結果
、非晶質金属としての特性、とりわけ靭性、磁気特性が
劣化するという問題が新たに発生する。而も、この構造
緩和は非可逆であって熱処理前の特性を回復することが
できないので好ましくない。また、特開昭５６−８７６
１０号の方法では脆化した非晶質金属粉から水素を完全
に放出することは不可能であυ、この方法で得られる非
晶質金属粉の粒度は同公報に記載の実施例によれば最大
１ｓｓｏミクロンとかなり粗い。Amorphous metal powder is used as a raw material for corrosion-resistant materials, high-strength and high-toughness materials, soft magnetic materials, etc., and is also used for catalysts, etc., and its uses are recently expanding. Proposed methods for producing the metal include a method in which molten metal is atomized and then cooled with a cooling liquid to rapidly solidify it into a powder, or a method in which a ribbon-shaped amorphous metal is mechanically pulverized. However, the cooling rate that can be achieved with the former method of cooling with a cooling liquid is limited, so the chemical composition of the metal that can be made into amorphous powder is limited to a narrow range, and large particles are It's difficult. The latter method has problems such as difficulty in pulverization due to the large toughness characteristic of amorphous metals. To solve this latter problem, prior to pulverization, the amorphous metal is heated to a temperature within the range of the temperature at which it transitions to a crystalline state (hereinafter referred to as the transition temperature) and a temperature 9250°C below that temperature to cause embrittlement. Method C for facilitating grinding and grinding JP-A-55-128
506), or a method of charging hydrogen at a temperature lower than the dislocation temperature prior to pulverization to make it brittle and facilitate pulverization (
JP-A-56-87610) has been proposed. The amorphous metal powder obtained by the method of JP-A-55-128506 is subjected to a heat treatment close to the dislocation temperature to relax the structure, which causes the problem that the properties as an amorphous metal, especially the toughness and magnetic properties, deteriorate. A new occurrence. However, this structural relaxation is not preferable because it is irreversible and the properties before heat treatment cannot be restored. Also, JP-A-56-876
In method No. 10, it is impossible to completely release hydrogen from the embrittled amorphous metal powder, and the particle size of the amorphous metal powder obtained by this method is based on the example described in the publication. It is quite rough, with a maximum of 1 sso micron.
先に本出願人は前記の如き問題点を解消し、広い化学組
成範囲にわたって溶融金属から容易に非晶質金属粉を製
造する方法を提供することを目的とし、溶融金属に対し
て濡れ性の小さな表面層を有し２ｍ／秒以上の周速度で
回転しているロール表面に溶融金属をノズルを経由して
供給し、該溶融金属を微細な溶融金属滴に分断したのち
、引続いて該溶融金属滴を１０ｍ／秒以上の周速度で回
転している金属回転体に衝突させて急冷凝固させる非晶
質金属粉の製造方法（特願昭５６−１０３３６９号以下
先行出願という）を提示した。Previously, the present applicant aimed to solve the above-mentioned problems and provide a method for easily producing amorphous metal powder from molten metal over a wide chemical composition range. Molten metal is supplied via a nozzle to the surface of a roll having a small surface layer and rotating at a circumferential speed of 2 m/sec or more, and the molten metal is divided into fine molten metal droplets, and then the molten metal is A method for producing amorphous metal powder (Japanese Patent Application No. 103369/1989 referred to as an earlier application) is presented in which molten metal droplets are collided with a metal rotating body rotating at a circumferential speed of 10 m/sec or more to rapidly solidify the amorphous metal powder. .
然しなからこの方法で得られる非晶質金属粉の粒度は２
０〜５００ミクロンであり、更に微細な非晶質金属粉製
造方法の開発が望まれている。However, the particle size of the amorphous metal powder obtained by this method is 2.
0 to 500 microns, and it is desired to develop a method for producing even finer amorphous metal powder.
本発明は上記の事情に鑑みて発明されたものであって、
前記先行出願の方法によって非晶質金属粉を得る第１工
程に、粉砕すべき非晶質金属粉材料をジェット気流中で
衝突させて粉砕する第２工程を組合わせた非晶質金属微
粉の製造方法に係る。The present invention was invented in view of the above circumstances, and
The first step of obtaining amorphous metal powder by the method of the prior application is combined with the second step of colliding and pulverizing the amorphous metal powder material to be crushed in a jet stream. Regarding the manufacturing method.
次に本発明の第１工程について説明する。Next, the first step of the present invention will be explained.
本発明者は非晶質金属粉を得る方法について種々研究を
重ねた結果、高速回転しているロールに溶融金属を上方
から落下供給し、その落下速度よシ著しく速いロール周
速度により溶融金属を負圧にしてキャビテーションを発
生させ、溶融金属を微細な溶融金属滴に分断し、引続い
てこれを高速より溶融金属を直接に非晶質の粉末とする
ことに成功した。As a result of various studies on methods for obtaining amorphous metal powder, the inventor of the present invention discovered that the molten metal is supplied by dropping it from above onto a roll rotating at high speed, and the molten metal is fed by dropping the molten metal from above onto a roll that is rotating at high speed. We succeeded in creating cavitation by applying negative pressure to break up the molten metal into fine molten metal droplets, and then directly converting the molten metal into amorphous powder at high speed.
上記のロールは表面が溶融金属を付着し難く、かつ瞬間
的に微粒子に分断して放出できるためには溶融金属に対
していわゆる濡れ性の小さな、換言すれば濡れ難い材料
から成るか、或いは少なくとも表面層は濡れ性の小さな
材料から成ることが必要であり、黒鉛もしくはＴｉＮ
、 Ｓｉ３Ｎ４．５ｉＣ１Ａ７Ｉ２０３等のセラミック
ス製のもの、または表面にこれらの層を有するものが好
適である。In order for the above-mentioned roll to have a surface that is difficult for molten metal to adhere to and can be instantaneously divided into fine particles and released, it must be made of a material that has so-called low wettability with respect to the molten metal, in other words, it is difficult to wet the molten metal, or at least The surface layer must be made of a material with low wettability, such as graphite or TiN.
, Si3N4.5iC1A7I203 or other ceramic materials, or those having these layers on the surface are suitable.
またロールは１個でもよく、或いは狭いロール間隔で相
対向する２個のロールでもよく、前者の場合には溶融金
属が落下方向へ回転するロール表面に接してその遠心力
の作用を効果的に受けると共に溶融金属滴が広い範囲に
飛散しないようにするため、溶融金属をロール表面の接
線方向に落下させることが好ましく、そのためにはノズ
ルを経由してロールに供給するのがよい。後者の場合に
はロール間隙近くに溶融金属を供給してやれば狭いロー
ル間隙を通過する間に、相対向して高速回転しているロ
ール表面の間で容易に負圧になってキャビテーションを
生ずると共に、両ロールの遠心力によって容易に、かつ
一層微細に分断され放出されることになる。両ロール間
隔は０．３ ｍ以下とすればその効果は大きい。二つの
ロールは同径かつ同一周速度であれば両ロール中心を結
ぶ線に直角な方向へ放出されるので次工程の回転体へ導
入するのに便である。回転するロールの周速度は２ｍ／
秒以下ではキャビテーションを生じ難いので、ロールの
周速度は２ｍ／秒以上とすることが必要である。Also, the number of rolls may be one, or two rolls facing each other with a narrow roll interval may be used. In the former case, the molten metal comes into contact with the surface of the roll rotating in the falling direction, and the action of the centrifugal force is effectively absorbed. In order to prevent the molten metal droplets from scattering over a wide area, it is preferable to allow the molten metal to fall in a tangential direction to the roll surface. For this purpose, it is preferable to supply the molten metal to the roll via a nozzle. In the latter case, if molten metal is supplied near the gap between the rolls, while it passes through the narrow gap between the rolls, it will easily become negative pressure between the surfaces of the rolls rotating at high speed facing each other, causing cavitation. Due to the centrifugal force of both rolls, it is easily and finely divided and released. The effect is great if the distance between both rolls is 0.3 m or less. If the two rolls have the same diameter and the same circumferential speed, they will be discharged in a direction perpendicular to the line connecting the centers of both rolls, making it convenient to introduce them into the rotating body for the next process. The peripheral speed of the rotating roll is 2m/
Since cavitation is difficult to occur at a speed of less than 2 m/s, the circumferential speed of the roll needs to be 2 m/s or more.
上記の如くに回転ロールによって分断された微細な溶融
金属滴は次にその下方にある回転体の外面または内面す
なわち回転面に衝突し急速に凝固冷却して非晶質粉末に
なる。このとき非晶質とするのに必要な冷却速度は金属
の化学組成によって異なるが、その臨界冷却速度は例え
ばおよそ１０６℃／秒 のオーダーであると考えられる
。回転ドラムの如き回転体を銅もしくは銅合金または鋼
製とし、かつ充分な熱容量を持たせて周速度を１ｏｎｉ
／秒以上となるように回転させておいて、これに衝突さ
せるとかなり広範囲の化学組成の溶融金属を前記臨界冷
却速度よシ大きい冷却速度で急冷させ、非晶質金属とし
て凝固させることができる。この場合の衝突面は回転ド
ラムの内面まだは外面いずれでも同様な効果が得られ、
また中空円筒体でなく円柱体でも良い。The fine molten metal droplets separated by the rotating rolls as described above then collide with the outer or inner surface of the rotating body located below, that is, the rotating surface, and are rapidly solidified and cooled to become an amorphous powder. At this time, the cooling rate required to make the metal amorphous varies depending on the chemical composition of the metal, but the critical cooling rate is considered to be, for example, on the order of approximately 106° C./second. A rotating body such as a rotating drum is made of copper, copper alloy, or steel, and has sufficient heat capacity so that the circumferential speed is 1 oni.
If the metal is rotated at a speed of 1/2 or more and collided with it, molten metal with a wide range of chemical compositions can be rapidly cooled at a cooling rate greater than the critical cooling rate, and solidified as an amorphous metal. . In this case, the collision surface can be either the inner or outer surface of the rotating drum, and the same effect can be obtained.
Moreover, a cylindrical body may be used instead of a hollow cylindrical body.
次に添付図面を参照して本発明の実施態様について説明
する。Next, embodiments of the present invention will be described with reference to the accompanying drawings.
るつぼ１の中には溶融金属２がはいっておシ、るつぼの
底の湯口からノズル３を通してその下方に設けられたロ
ール４に溶融金属２が供給される。Molten metal 2 enters the crucible 1 and is supplied from a sprue at the bottom of the crucible through a nozzle 3 to a roll 4 provided below.
ロール４は図示しない駆動装置によって高速回転される
ようになっており、ノズル３は水冷ジャケット５によっ
て外部から水冷して溶損しないようにしておくとよい。The roll 4 is rotated at high speed by a drive device (not shown), and the nozzle 3 is preferably externally cooled by a water cooling jacket 5 to prevent it from melting.
ロール４は前記したように１個の場合の例を第１図に、
また２個のロール４ａ、４ｂの対よシ成る場合の例を第
２図に示しである。As mentioned above, an example in which there is only one roll 4 is shown in Fig. 1.
FIG. 2 shows an example of a pair of rolls 4a and 4b.
ロール４の下方に回転体７が設けられており、ロール４
で分断された溶融金属滴６が回転体７に衝突して急速に
凝固冷却するようにしである。回転体７は第１〜２図ま
たは第４図７ｂに示すように円筒体、あるいは第３図に
示すような中央から左右対称に截頭円錐面を有する形状
の回転体７ａでもよい。第１〜２図は円筒体の外周面を
使用する例を、第４図は円筒体の内周面を使用する例を
示している。A rotating body 7 is provided below the roll 4.
The molten metal droplets 6 separated by the molten metal droplets 6 collide with the rotating body 7 and are rapidly solidified and cooled. The rotating body 7 may be a cylindrical body as shown in FIGS. 1 and 2 or 7b of FIG. 4, or a rotating body 7a having a shape having a truncated conical surface symmetrically from the center as shown in FIG. 3. 1 and 2 show an example in which the outer circumferential surface of the cylindrical body is used, and FIG. 4 shows an example in which the inner circumferential surface of the cylindrical body is used.
回転体６の下方には非晶質金属粉８を収容する容器９を
備えておく。A container 9 containing amorphous metal powder 8 is provided below the rotating body 6.
なお、非晶質金属粉を連続的に製造するに当っては回転
体７．７ａまだは７ｂを強制冷却しながら操業すること
が臨界冷却速度以上の冷却速度を確保するため望ましい
。In the continuous production of amorphous metal powder, it is desirable to operate while forcibly cooling the rotating bodies 7.7a and 7b in order to ensure a cooling rate higher than the critical cooling rate.
この第１工程を経て得られる非晶質金属粉は２０〜５０
０ミクロンの大きさで厚さが薄く、かつ第５図の顕微鏡
写真に示すように極めて不規則な形状を呈しているので
微粉末に容易に粉砕することができる。The amorphous metal powder obtained through this first step is 20 to 50%
Since it is thin with a size of 0 microns and has an extremely irregular shape as shown in the micrograph of FIG. 5, it can be easily ground into fine powder.
次に本発明の第２工程について説明する。第２工程の実
施に好適な粉砕機は第６図に示すような環流するジェッ
ト気流中に粉砕すべき材料を供給して粉砕するタイプ（
ジェットミルという）であって、数１０な、、）シ数１
ｏｏミクロン程度の材料はフィードホッパ１０に投入さ
れ、ベンチュリーノズル１１によって超音速に加速され
てミル１２内に導かれ、ミル下部に設けられた送風管１
３を通ってグラインデインズノズル１４から吐出される
圧力流体によって形成される粉砕ゾーン１５内で相互衝
突、相互摩擦粉砕が行われ、数ミクロンの微粉となって
上昇通路１６を上昇後、分級部１７を経て排出口１９か
ら数ミクロン以下の超微粉のみが系外に取出され、粗粉
粒子は圧力流体によって下降通路１８を下降して被粉砕
材料と合流して循環粉砕される。Next, the second step of the present invention will be explained. A suitable crusher for carrying out the second step is a type (as shown in Fig. 6) in which the material to be crushed is fed into a circulating jet stream.
It is called a jet mill, and the number is 10,,), and the number is 1.
Materials in the order of 0 microns are put into a feed hopper 10, accelerated to supersonic speed by a venturi nozzle 11, guided into a mill 12, and passed through a blow pipe 1 provided at the bottom of the mill.
Mutual collision and mutual friction pulverization are performed in the pulverization zone 15 formed by the pressure fluid discharged from the Grindins nozzle 14 through the Grindins nozzle 14. Only ultrafine powder of several microns or less is taken out of the system through the discharge port 19, and the coarse particles are moved down the descending passage 18 by the pressure fluid to join with the material to be pulverized and are circulated and pulverized.
なお、これらの粉砕機内の雰囲気を必要に応じて窒素、
アルゴン、ヘリウム等の不活性ガス雰囲気とすることが
できることは言うまでもない。In addition, the atmosphere inside these crushers may be changed to nitrogen,
Needless to say, an atmosphere of an inert gas such as argon or helium can be used.
次に本発明の方法による実験例について述べる。Next, an experimental example using the method of the present invention will be described.
実験例１
” ６０Ｆｅ２０Ｐ２０ Ｎ ” ７５’Ｓ ’８Ｂ１
７１”ｅ７８ＳｉＪ ＯＢｌ ２ ＮＦｅ４７ＣＯ７ｏ
３Ｓｉ１．Ｂ１イＦｅ８ｏＢ１３Ｓｉ４Ｃ２およびＦｅ
７２Ｐ１３Ｃ７ＣｒＢ の各溶湯を第２〜４図に示す
装置を使用し、石英管層のノズル３を経由して黒鉛製ロ
ール４ａ、４ｂの間隙に向けて落下供給した。Experimental example 1 ``60Fe20P20N''75'S'8B1
71”e78SiJ OBl 2 NFe47CO7o
3Si1. B1 Fe8oB13Si4C2 and Fe
Each molten metal of 72P13C7CrB was supplied falling through the nozzle 3 of the quartz tube layer toward the gap between the graphite rolls 4a and 4b using the apparatus shown in FIGS.
ロール４ａ、４ｂは径６０題で０．０５１１１１＋＋の
間隙をおいて相対向させ、それぞれ５０００ｒｐｍ（周
速１５．７ｍ／秒）で回転させておいた。ロール４ａ。The rolls 4a and 4b had a diameter of 60 mm, were opposed to each other with a gap of 0.051111++, and were rotated at 5000 rpm (peripheral speed 15.7 m/sec). Roll 4a.
４ｂを通ｉｔした溶融金属滴は高速で下向きに放出し、
銅製回転円筒体７の表面（周速度５２．４ｍ／秒）ＶＣ
衝突させて急冷して２０〜５００ミクロンの不規則形状
の非晶質金属粉とした。これを６に７／−の脱湿した空
気を用い送風量５Ｎｍ’／分のジェットミルで粉砕した
。得られた微粉の平均粒径は第１表に示すとおシであシ
、粒径−の最大値はおよそ１０ミクロン、最小値は０．
１ミクロンであった。The molten metal droplets passing through 4b are ejected downward at high speed,
Surface of copper rotating cylinder 7 (peripheral speed 52.4 m/sec) VC
The particles were collided and rapidly cooled to obtain an irregularly shaped amorphous metal powder of 20 to 500 microns. This was pulverized with a jet mill using dehumidified air of 6 to 7/- at an air flow rate of 5 Nm'/min. The average particle size of the obtained fine powder is shown in Table 1.The maximum particle size is approximately 10 microns, and the minimum particle size is 0.
It was 1 micron.
実験例２
Ｃｕ６０Ｚｒ４イＣｕ６７”３３、Ｎ１６７”ｒ３３、
Ｎｉ６０Ｔｉ４０およびＰｄ３３Ｚｒ６７の各溶湯をア
ルゴン雰囲気中で第２〜４図に示す装置を使用し、ライ
ム製のノズル３を経由して黒鉛製ロール４ａ１４ｂの間
隙に向けて落下供給した。ロール４ａ１４ｂは径６０麿
で、０．０５１１１１１の間隙をおいて相対向させ、そ
れぞれ６０００ ｒ、ｐ、ｍ、（周速度１８．８ ｍ７
秒）で回転させておいた。ロール４ａ、４ｂ間を通過し
た溶融金属滴は高速で下向きに放出し、銅製回転円筒体
７ａの表面（周速度７ｓ、ｓｍ／秒）に衝突させ急冷し
て２０〜５００ミクロンの不規則な形状の非晶質金属粉
とした。これを６ ｋｇ、、／ｃｒＡの窒素ガスを用い
２Ｎｍ’／分 のジェットミルで粉砕して得られた微粉
のサイズは第２表に示すとおりであった。なお粒径の最
大値はおよそ１５ミクロン、最小値は０．１ミクロンで
あった。Experimental example 2 Cu60Zr4i Cu67"33, N167"r33,
Molten metals of Ni60Ti40 and Pd33Zr67 were supplied in an argon atmosphere using the apparatus shown in FIGS. 2 to 4, dropping through lime nozzles 3 toward the gap between graphite rolls 4a14b. The rolls 4a14b have a diameter of 60 mm, are opposed to each other with a gap of 0.0511111, and are each rolled at 6000 r, p, m, (peripheral speed 18.8 m7).
It was rotated in seconds). The molten metal droplets that have passed between the rolls 4a and 4b are discharged downward at high speed, collide with the surface of the copper rotating cylinder 7a (peripheral speed 7s, sm/sec), and are rapidly cooled to form an irregular shape of 20 to 500 microns. It was made into an amorphous metal powder. This was pulverized using a jet mill at 2 Nm'/min using nitrogen gas at 6 kg/crA, and the size of the fine powder obtained was as shown in Table 2. The maximum particle size was approximately 15 microns, and the minimum particle size was 0.1 microns.
第２表
以上説明したように、本発明においては第１工程として
高速回転するロール回転面に溶融金属を落下供給し、溶
湯金属内に生ずる負圧によってキャビテーションを起さ
せて微細な溶滴に分断して遠心力によって高速で放出し
、続いて熱伝導性のよい回転体の回転面に衝突させ臨界
冷却速度以上の速度で急速に凝固冷却させるので容易に
非晶質金属粉を得ることができる。このようにして得ら
れた非晶質金属粉の粒度は２０〜５００ミクロンであυ
、厚さが薄くかつ不規則な形状をしているので、非晶質
金属粉は延性が大きいにもかかわらず、ジェット気流に
乗せて相互衝突や摩擦によって微粉砕することが可能で
あシ、容易に数ミクロンの超微粉とすることができるな
ど本方法の工業上の効果はきわめて大きい。Table 2 As explained above, in the first step of the present invention, molten metal is dropped onto the rotating surface of a roll rotating at high speed, and the negative pressure generated within the molten metal causes cavitation and breaks it into fine droplets. It is released at high speed by centrifugal force, and then collided with the rotating surface of a rotating body with good thermal conductivity to rapidly solidify and cool at a speed higher than the critical cooling rate, making it easy to obtain amorphous metal powder. . The particle size of the amorphous metal powder thus obtained is 20 to 500 microns.
Although amorphous metal powder has a high ductility due to its thin thickness and irregular shape, it is possible to carry it in a jet stream and pulverize it by mutual collision and friction. The industrial effects of this method are extremely large, as it can easily be made into ultrafine powder of several microns.
第１図は本発明の方法の第１工程の実施態様の要部を図
解的に示す一部破断立面図、第２図は同じくロール２個
の場合の実施態様を示す同様な立面図、第３図は同じく
回転体の異なる他の実施態様を示す同様な立面図、第４
図は同じく回転体の内周面を使用したその他の実施態様
を示す同様な立面図、第５図は第１工程で得られた非晶
質金属粉の写真、第６図は第２工程の実施態様の要部を
図解的に示す縦断面図である。
１・・・るつぼ、２・・・溶融金属、３・・・ノズル、
４・・・ロール、４ａ、４ｂ・・・ロール対、５・・・
冷却用ジャケット、６・・・溶融金属滴、７．７ａ１７
ｂ・・・回転体、８・・・金属粉、９・・・容器、１０
・・・フィードホッパ、１１・・・ベンチュリーノズル
、１２・・・ミル、１３・・・送風管、１４・・・グラ
インディングノズル、１５・・・粉砕ゾーン、１６・・
・上昇通路、１７・・・分級部、１８・・・下降通路
出願人代理人 弁理士 鴨志１）次 男第３図
第５図
７
第６図FIG. 1 is a partially cutaway elevational view schematically showing the main parts of an embodiment of the first step of the method of the present invention, and FIG. 2 is a similar elevational view showing an embodiment in the case of two rolls. , FIG. 3 is a similar elevational view showing a different embodiment of the rotating body, FIG.
The figure is a similar elevational view showing another embodiment using the inner peripheral surface of the rotating body, Figure 5 is a photograph of the amorphous metal powder obtained in the first step, and Figure 6 is the second step. FIG. 2 is a longitudinal cross-sectional view schematically showing a main part of an embodiment of the invention. 1... Crucible, 2... Molten metal, 3... Nozzle,
4...Roll, 4a, 4b...Roll pair, 5...
Cooling jacket, 6... Molten metal droplets, 7.7a17
b... Rotating body, 8... Metal powder, 9... Container, 10
...Feed hopper, 11...Venturi nozzle, 12...Mill, 13...Blow pipe, 14...Grinding nozzle, 15...Crushing zone, 16...
・Ascending passage, 17... Classification department, 18... Descending passage Applicant's agent Patent attorney Kamoshi 1) Tsugumi Figure 3 Figure 5 Figure 7 Figure 6
Claims (1)
以上の周速度で回転しているロール表面に、溶融金属を
ノズルを経由して上方から供給して該溶融金属を微細な
溶融金属滴に分断したのち、引続いて該溶融金属滴を１
０ｍ／秒以上の周速度で回転している金属回転体に衝突
させて急冷凝固させることによシ非晶質金属粉とする第
１工程と、該非晶質金属粉を環流するジェット気流中に
供給して相互衝突、相互摩擦によシ粉砕する第２工程 を行なうことを特徴とする非晶質金属微粉末の製造方法[Claims] Molten metal is supplied from above via a nozzle to the surface of a roll that has a surface layer with low wettability to the molten metal and is rotating at a circumferential speed of 2 m/sec or more. After dividing the molten metal into fine molten metal droplets, the molten metal droplets are
A first step of forming an amorphous metal powder by colliding with a metal rotating body rotating at a circumferential speed of 0 m/sec or more and rapidly solidifying it, and a jet stream that circulates the amorphous metal powder. A method for producing fine amorphous metal powder, characterized by carrying out a second step of supplying and pulverizing by mutual collision and mutual friction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3894283A JPS59166606A (en) | 1983-03-11 | 1983-03-11 | Preparation of amorphous metal fine powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3894283A JPS59166606A (en) | 1983-03-11 | 1983-03-11 | Preparation of amorphous metal fine powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59166606A true JPS59166606A (en) | 1984-09-20 |
Family
ID=12539274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3894283A Pending JPS59166606A (en) | 1983-03-11 | 1983-03-11 | Preparation of amorphous metal fine powder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59166606A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0754019A (en) * | 1993-08-17 | 1995-02-28 | Nippon Sozai Kk | Production of powder by multistage fissure and quenching |
| WO2019124224A1 (en) * | 2017-12-19 | 2019-06-27 | 株式会社村田製作所 | Amorphous alloy particles, and method for producing amorphous alloy particles |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4895351A (en) * | 1972-03-18 | 1973-12-07 | ||
| JPS5371642A (en) * | 1976-12-08 | 1978-06-26 | Toyota Motor Co Ltd | Preparation of powder for melting and injection |
| JPS586907A (en) * | 1981-07-03 | 1983-01-14 | Riken Corp | Manufacture of amorphous metallic powder |
-
1983
- 1983-03-11 JP JP3894283A patent/JPS59166606A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4895351A (en) * | 1972-03-18 | 1973-12-07 | ||
| JPS5371642A (en) * | 1976-12-08 | 1978-06-26 | Toyota Motor Co Ltd | Preparation of powder for melting and injection |
| JPS586907A (en) * | 1981-07-03 | 1983-01-14 | Riken Corp | Manufacture of amorphous metallic powder |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0754019A (en) * | 1993-08-17 | 1995-02-28 | Nippon Sozai Kk | Production of powder by multistage fissure and quenching |
| WO2019124224A1 (en) * | 2017-12-19 | 2019-06-27 | 株式会社村田製作所 | Amorphous alloy particles, and method for producing amorphous alloy particles |
| US11401596B2 (en) | 2017-12-19 | 2022-08-02 | Murata Manufacturing Co., Ltd. | Amorphous alloy particle and method for manufacturing amorphous alloy particle |
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