JPS58189308A - Manufacture of metallic powder - Google Patents
Manufacture of metallic powderInfo
- Publication number
- JPS58189308A JPS58189308A JP6960082A JP6960082A JPS58189308A JP S58189308 A JPS58189308 A JP S58189308A JP 6960082 A JP6960082 A JP 6960082A JP 6960082 A JP6960082 A JP 6960082A JP S58189308 A JPS58189308 A JP S58189308A
- Authority
- JP
- Japan
- Prior art keywords
- roll
- molten metal
- speed
- nozzle
- droplets
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/10—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying using centrifugal force
Landscapes
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
Description
【発明の詳細な説明】 本発明は金属粉末の製造方法に係る。[Detailed description of the invention] The present invention relates to a method for producing metal powder.
金属粉末の大量生産の方法としては機械的粉砕法、噴霧
法、還元法等があるが、いずれも手数がかかるとか、或
いは複雑な装置を必要とするなどの欠点がある。Methods for mass production of metal powder include mechanical crushing, spraying, reduction, etc., but all of them have drawbacks such as being time-consuming and requiring complicated equipment.
本発明は簡単な設備で簡便に金属粉末を製造する方法を
提供することを目的としており、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
しているロールの表面に溶融金属をノズルを経由して落
下供給して該溶融金属を微細な溶融金属滴に分断し凝固
させる金属粉末以上の速さで相対的に移動させる金属粉
末の製造方法に係る。The purpose of the present invention is to provide a method for easily producing metal powder using simple equipment. A method for producing metal powder, in which molten metal is dropped onto the surface of a roll through a nozzle, and the molten metal is divided into fine molten metal droplets and solidified, moving relatively at a speed higher than that of the metal powder. .
本発明にあっては、高速回転しているロール表面に溶融
金属を落下させ、その落下速度より著しく速いロール周
速度によって溶融金属を負圧にすることによりキャビテ
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、凝固させて金属を微細な粉末とする。In the present invention, molten metal is dropped onto the surface of a roll rotating at high speed, and cavitation is generated by applying negative pressure to the molten metal at a circumferential speed of the roll that is significantly faster than the falling speed. Breaks the molten metal into droplets and solidifies the metal into a fine powder.
上記のロールは表面が溶融金属を付着し離く、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ＴＡＮ％
ＳｉＮ 、 ８４０、ＡＩｏ等の七う之ツクス製のもの
、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 be able to adhere and release molten metal on its surface and instantaneously break it up into fine particles and release it, it must be made of a material that has a low wettability to the molten metal, in other words, it is difficult to wet the molten metal. At least the surface layer must be made of a material with low wettability, such as graphite or TAN%
It is preferable to use materials made of materials such as SiN, 840, AIo, etc., or materials having a layer of these materials on the surface.
またロールは７個でもよく、或いは狭いｐ−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党一層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、溶融金属を四一層表面
の接線方向に近く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謙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０．３ｍｍ以下とすればその効果社大きい。二
つのロールは同径かつ同一周速度であれば両ｐ−ル中心
を結ぶ線に直角な方向へ放出されるので金属粉末を収容
するのに便である。In addition, the number of rolls may be seven, or it may be two rolls facing each other with a narrow distance between the rolls. In the former case, the molten metal contacts the surface of the rotating metal in the falling direction, and the centrifugal force acts on the molten metal. In order to receive the molten metal effectively and to prevent the molten metal droplets from scattering over a wide area, it is preferable to let the molten metal fall close to the tangential direction of the surface of the fourth layer. It is better to do so. In the latter case, if molten metal is supplied near the gap between the rolls, it will easily become negative pressure between the surfaces of the rolls rotating at high speed while facing each other while passing through the narrow roll gap, causing cavitation. Due to the centrifugal force of both rolls, it is easily and finely divided and released. If the distance between both rolls is 0.3 mm or less, the effect will be great. 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, which is convenient for containing the metal powder.
前記ロールは、溶融金属を表面の一定の円周上に連続し
て落下供給するようにすると、表面層は前述したように
黒鉛製またはセラミック製であって熱伝導が低くかつ脆
いので、キャビテーションによって損傷するようになる
。このようなロールの損傷を防止するため、ロール表面
の溶融金属が落下する位置を絶えず変えるようにする。When the molten metal is continuously supplied falling onto the surface of the roll, the surface layer is made of graphite or ceramic, which has low heat conductivity and is brittle, as described above, so cavitation occurs. Becomes damaged. To prevent such damage to the roll, the position where the molten metal falls on the roll surface is constantly changed.
即ち、ロールの回転中にロールとノズルとをロールの軸
方向に相対的に移動させるようにする。その移動速度は
０．０／ｍｍ／秒以上であればロールの損傷を防止する
ことができる。この場合、ロールを移動させても良いし
、ノズルを移動させても良いが、ノズルを溶融金属が収
容されるるつぼごと移動させるのが、移動のための機構
を簡単にでき、有利である。That is, the roll and the nozzle are moved relative to each other in the axial direction of the roll while the roll is rotating. If the moving speed is 0.0/mm/sec or more, damage to the roll can be prevented. In this case, the roll may be moved or the nozzle may be moved, but it is advantageous to move the nozzle together with the crucible containing the molten metal because the mechanism for movement can be simplified.
次に添付図面を参照して本発明の実施態様を説明する。Next, embodiments of the present invention will be described with reference to the accompanying drawings.
る−″）はＶ）の中には溶融金属Ωが入っており、るつ
ほの底の湯口からノズル■を通してその下方に設けられ
たロール（ロ）に溶融金属が供給される。Molten metal Ω is contained in V), and the molten metal is supplied from the sprue at the bottom of the melting hole to the roll (B) provided below through the nozzle (3).
ロー椙い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＠社水冷ジャケット（２）に
よって外部から水冷して溶損しな−ようにしておくと良
い。るつぼＶ）は図示しな一駆動装置によってロール（
ロ）また＃′ｉ（≠ａ）、（≠ｂ）の軸方向に低速で移
動するようにしである。The raw material is rotated at high speed by a drive device (not shown), and it is preferable to cool it with water from the outside using a nozzle water cooling jacket (2) to prevent it from melting. The crucible V) is moved by a roll (
b) It is also designed to move at low speed in the axial direction of #'i (≠a) and (≠b).
ロール（ロ）は前記したように７個の場合の例を第１図
に、また２個のロール（≠＆）、（＜ｚｂ）の対より溶
融金属＠はロール（ロ）の表面に当って或いはロール（
弘＆）及び（＜ｚｂ）の間隙を通って微細な溶融金属滴
（θに分断され、凝固して微細な金属粉末（７）となっ
て容器鎖に収容される。Figure 1 shows an example in which there are seven rolls (B) as described above, and from a pair of two rolls (≠&), (<zb), the molten metal @ hits the surface of the roll (B). Te or roll (
The fine molten metal droplets (θ) pass through the gap between the droplets (H&) and (<zb), are divided into fine molten metal droplets (θ), solidify into fine metal powder (7), and are accommodated in the container chain.
なお、ロールの下方に高速で回転する金属回転体を設け
、溶融金属滴を該金属回転体の表面に衝突させるように
すると、凝固速度が速くなって微細組織を有する金属粉
末を得ることができる。Note that if a metal rotating body that rotates at high speed is provided below the roll and the molten metal droplets are made to collide with the surface of the metal rotating body, the solidification rate becomes faster and metal powder with a fine structure can be obtained. .
以上説明したように本発明の方法によるときは、複雑な
装置を必要とせず、簡単な操作で金属の粉末を連続的に
得ることができる。As explained above, when using the method of the present invention, metal powder can be continuously obtained with simple operations without the need for complicated equipment.
第１図は本発明の方法の実施態様の要部を図解的に示す
図面、第２図は同じくロール２個の場合（
（イ）−るつに、■−溶融金属、（５）−ノズル、に）
−・ｐ−ル、（≠ｓＬ）、（≠ｂ）−−−ロール対、■
−冷却用ジャケット、（乙）−溶融金属滴、ω−４ＪＩ
粉末、■−容器
出願人 株式会社 リ ケ ンFig. 1 is a diagram schematically showing the main part of the embodiment of the method of the present invention, and Fig. 2 is a drawing showing the same case in which two rolls are used ((a) - molten metal, (5) - nozzle). , to)
-・p-ru, (≠sL), (≠b)---roll pair, ■
- Cooling jacket, (B) - Molten metal droplet, ω-4JI
Powder, ■-Container Applicant: Riken Co., Ltd.
Claims (1)
秒以上の周速度で回転しているｐ−ルの表面に溶融金属
をノズルを経由して落下供給して該溶融金属を微細な溶
融金属滴に分断し凝固させる金属粉末の製造方法であっ
て、該ロールの回転中に該ロールと該ノズルとを該ロー
ルの軸方向に０、０ ＞’ｍ ／秒以上の速さで相対的
に移動させる金属粉末の製造方法。It has a surface layer with low wettability for molten metal, and has a surface layer of 2m/
A method for producing metal powder, which comprises dropping molten metal onto the surface of a roller rotating at a circumferential speed of seconds or more via a nozzle, dividing the molten metal into fine molten metal droplets, and solidifying the molten metal. A method for producing metal powder, comprising moving the roll and the nozzle relative to each other in the axial direction of the roll at a speed of 0,0>'m/sec or more while the roll is rotating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6960082A JPS58189308A (en) | 1982-04-27 | 1982-04-27 | Manufacture of metallic powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6960082A JPS58189308A (en) | 1982-04-27 | 1982-04-27 | Manufacture of metallic powder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58189308A true JPS58189308A (en) | 1983-11-05 |
| JPS6241287B2 JPS6241287B2 (en) | 1987-09-02 |
Family
ID=13407486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6960082A Granted JPS58189308A (en) | 1982-04-27 | 1982-04-27 | Manufacture of metallic powder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58189308A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6152308A (en) * | 1984-08-17 | 1986-03-15 | Ishikawajima Harima Heavy Ind Co Ltd | Production of metallic powder |
| JPS6283835U (en) * | 1985-11-13 | 1987-05-28 | ||
| CN110961640A (en) * | 2019-12-27 | 2020-04-07 | 深圳微纳增材技术有限公司 | Device and method for preparing metal powder for 3D printing |
-
1982
- 1982-04-27 JP JP6960082A patent/JPS58189308A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6152308A (en) * | 1984-08-17 | 1986-03-15 | Ishikawajima Harima Heavy Ind Co Ltd | Production of metallic powder |
| JPS6283835U (en) * | 1985-11-13 | 1987-05-28 | ||
| CN110961640A (en) * | 2019-12-27 | 2020-04-07 | 深圳微纳增材技术有限公司 | Device and method for preparing metal powder for 3D printing |
| CN110961640B (en) * | 2019-12-27 | 2023-12-01 | 深圳微纳增材技术有限公司 | Device and method for preparing metal powder for 3D printing |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6241287B2 (en) | 1987-09-02 |
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