JPH04329805A - Production of metallic powder - Google Patents
Production of metallic powderInfo
- Publication number
- JPH04329805A JPH04329805A JP10101291A JP10101291A JPH04329805A JP H04329805 A JPH04329805 A JP H04329805A JP 10101291 A JP10101291 A JP 10101291A JP 10101291 A JP10101291 A JP 10101291A JP H04329805 A JPH04329805 A JP H04329805A
- Authority
- JP
- Japan
- Prior art keywords
- cooling liquid
- flow
- metal powder
- metallic powder
- coolant
- 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
- 239000000843 powder Substances 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 239000002184 metal Substances 0.000 claims abstract description 39
- 229910052751 metal Inorganic materials 0.000 claims abstract description 39
- 239000000110 cooling liquid Substances 0.000 claims abstract description 25
- 239000002826 coolant Substances 0.000 claims description 25
- 238000001816 cooling Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 238000010924 continuous production Methods 0.000 abstract 1
- 238000002347 injection Methods 0.000 description 10
- 239000007924 injection Substances 0.000 description 10
- 239000007789 gas Substances 0.000 description 6
- 238000000926 separation method Methods 0.000 description 5
- 230000008016 vaporization Effects 0.000 description 3
- 238000009834 vaporization Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は冷却作用の優れた金属粉
末の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing metal powder with excellent cooling effect.
【０００２】0002
【従来の技術】従来、図２に示すように、管体３１を流
れる冷却液流３２に溶融金属３３を注入し、冷却液流３
２と注入された溶融金属３３との流速差によって溶融金
属を分断し、分断された溶滴３４を冷却液流３２中で冷
却凝固し、両者を分離して金属粉末を製造する方法があ
る。2. Description of the Related Art Conventionally, as shown in FIG.
There is a method in which the molten metal is divided by a flow velocity difference between the droplets 34 and the injected molten metal 33, the divided droplets 34 are cooled and solidified in the cooling liquid flow 32, and the two are separated to produce metal powder.
【０００３】0003
【発明が解決しようとする課題】しかしながら、冷却液
流３２によって分断された溶滴３４は、冷却液流３２中
を冷却液とほぼ同速度で流れていくので、冷却液の気化
により生じたガス （例えば、冷却水の場合は水蒸気）
が分離せず、溶滴３４の周りを覆った状態となり、こ
のガス膜が断熱作用をなすため冷却作用が劣り、このた
め急冷凝固金属粉末の特徴である結晶粒の微細化や合金
元素の過飽和固溶に難があった。[Problems to be Solved by the Invention] However, since the droplets 34 separated by the coolant flow 32 flow through the coolant flow 32 at approximately the same speed as the coolant, the droplets 34 are separated by the gas generated by the vaporization of the coolant. (For example, water vapor in the case of cooling water)
The gas film does not separate and is wrapped around the droplet 34, and this gas film acts as a heat insulator, resulting in poor cooling effect, which results in the fineness of crystal grains and supersaturation of alloying elements, which are characteristics of rapidly solidified metal powder. There were difficulties in solid solution.
【０００４】本発明はかかる問題に鑑みなされたもので
、冷却作用の優れた金属粉末の連続製造方法を提供する
ことを目的とする。The present invention was made in view of the above problem, and an object thereof is to provide a method for continuously producing metal powder with an excellent cooling effect.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
になされた本発明の金属粉末の製造方法は、管体中を流
れる冷却液流に溶融金属を注入し、該冷却液流によって
溶融金属を分断し、分断した溶滴を冷却液中で凝固させ
、冷却液と金属粉末とを分離する金属粉末の製造方法に
おいて、冷却液流に遠心力が作用する曲管部を管体に設
け、分断された溶滴を含む冷却液流を該曲管部に流すこ
とを発明の構成とする。[Means for Solving the Problems] The method for producing metal powder of the present invention, which has been made to achieve the above object, involves injecting molten metal into a coolant flow flowing in a tube, and causing the molten metal to be melted by the coolant flow. In a method for producing metal powder in which the coolant and the metal powder are separated by dividing the divided droplets and solidifying the divided droplets in a cooling liquid, the tube body is provided with a curved pipe portion where centrifugal force acts on the flow of the cooling liquid, The structure of the invention is to allow a coolant flow containing the divided droplets to flow through the curved pipe section.
【０００６】[0006]
【作用】曲管部中を冷却液流が流れる際、冷却液流中の
溶滴は質量が大きいため遠心力の作用で冷却液流を横切
るように流れる。このとき、溶滴の外周に付着した水蒸
気等のガス膜は連続的に引き剥がされ、冷却液が溶滴の
表面に常時接触するようになる。[Operation] When the coolant stream flows through the curved pipe, the droplets in the coolant stream have a large mass, so they flow across the coolant stream due to the action of centrifugal force. At this time, the gas film such as water vapor adhering to the outer periphery of the droplet is continuously peeled off, and the cooling liquid comes to be in constant contact with the surface of the droplet.
【０００７】[0007]
【実施例】まず、本発明の金属粉末製造方法を実施する
ための装置について説明する。図１は実施例に係る金属
粉末製造装置を示しており、冷却液流２１を流すための
管体１ と、管体１ 内の冷却液流２１に溶融金属２２
を注入するための供給容器２ と、前記管体１ に冷却
液を圧送するための手段であるポンプ３ とを備えてい
る。EXAMPLES First, an apparatus for carrying out the method for producing metal powder of the present invention will be described. FIG. 1 shows a metal powder manufacturing apparatus according to an embodiment, which includes a pipe body 1 for flowing a coolant flow 21, and a molten metal 22 in the coolant flow 21 in the pipe body 1.
It is equipped with a supply container 2 for injecting the cooling liquid, and a pump 3 that is a means for pumping the cooling liquid into the pipe body 1.
【０００８】前記管体１ の基部５ には、注入ノズル
１１を装着するための取付口６ が開設されており、基
部５ の下流側には一定の曲率半径で屈曲形成された曲
管部７ が連設され、その下流側に排出管部８ が連成
されている。
尚、図において、曲管部７ は鉛直面内に屈曲形成され
ているが、水平面内に屈曲形成してもよい。また、曲管
部７ は基部５ の注入ノズル取付口６ 側の近い位置
に設けるのがよい。[0008] The base 5 of the tube body 1 is provided with an attachment port 6 for mounting the injection nozzle 11, and the downstream side of the base 5 is a curved tube portion 7 formed with a constant radius of curvature. are connected to each other, and a discharge pipe section 8 is connected to the downstream side thereof. In the figure, the bent pipe portion 7 is bent in a vertical plane, but it may be bent in a horizontal plane. Further, it is preferable that the bent pipe portion 7 is provided at a position close to the injection nozzle attachment port 6 of the base portion 5.
【０００９】前記供給容器２ の外周には加熱用の誘導
コイル１０が巻回形成されており、その底部には注入ノ
ズル１１が付設されている。該注入ノズル１１は前記管
体基部５ の取付口６ に装着される。供給容器２ に
は圧媒としてＡｒやＮ２ 等の不活性ガスや溶融金属が
圧送され、容器内の溶融金属２２は前記注入ノズル１１
を介して基部５中の冷却液流２１に注入される。尚、供
給容器２ や注入ノズル１１は黒鉛や窒化珪素等の耐火
材で形成される。An induction coil 10 for heating is wound around the outer periphery of the supply container 2, and an injection nozzle 11 is attached to the bottom thereof. The injection nozzle 11 is attached to the attachment port 6 of the tube base 5. An inert gas such as Ar or N2 as a pressure medium and molten metal are fed into the supply container 2 under pressure, and the molten metal 22 in the container is fed to the injection nozzle 11.
into the coolant stream 21 in the base 5. The supply container 2 and the injection nozzle 11 are made of a refractory material such as graphite or silicon nitride.
【００１０】前記管体１ の基部５ の開口端は、ポン
プ３ を介してタンク１３に配管されており、一方排出
管部８ の開口端の下方には、冷却液を下方に通過可能
とすると共に金属粉末を分離するためのメッシュ部材１
４が傾斜状に配設された分離容器１５が備えられている
。分離容器１５の底部はタンク１３に配管されており、
分離容器１５によって分離された冷却液はタンク１３に
戻され、循環使用される。タンク１３には、図示省略の
補給用の冷却液供給管が設けられ、またタンク内や循環
流路の途中に冷却器を適宜介在させてもよい。冷却液と
しては一般に水が使用されるが、油が使用される場合も
ある。The open end of the base 5 of the tube body 1 is connected to a tank 13 via a pump 3, while the lower part of the open end of the discharge pipe 8 is configured to allow cooling liquid to pass downward. Mesh member 1 for separating metal powder together with
A separation container 15 in which containers 4 are arranged in an inclined manner is provided. The bottom of the separation vessel 15 is piped to the tank 13,
The coolant separated by the separation container 15 is returned to the tank 13 and used for circulation. The tank 13 is provided with a cooling liquid supply pipe for replenishment (not shown), and a cooler may be appropriately interposed within the tank or in the middle of the circulation flow path. Water is generally used as the coolant, but oil may also be used.
【００１１】本発明を実施するには、まず、ポンプ３
を作動させて、管体１ に高速の冷却液流２１を流す。
次に、供給容器２ に不活性等の圧媒を圧送し、容器内
の溶融金属２２を注入ノズル１１を介して基部５ を流
れる冷却液流２１中へ注入し、分断する。分断された溶
滴２３は、管体１ の基部５ から曲管部７ へと冷却
液と共に流れる。この際、溶滴２３は曲管部７ で遠心
力が作用し、流れを横切るように移動しながら流下する
。このため、溶滴２３の周りに冷却液の気化によって生
じたガス膜は除去され、冷却液により急冷凝固される。To carry out the present invention, first, the pump 3
is activated to cause a high-velocity coolant flow 21 to flow through the tube body 1 . A pressure medium, such as an inert one, is then pumped into the supply vessel 2 and the molten metal 22 in the vessel is injected and disrupted through the injection nozzle 11 into the coolant stream 21 flowing through the base 5. The separated droplets 23 flow together with the cooling liquid from the base 5 of the tube 1 to the bent tube 7. At this time, centrifugal force acts on the droplet 23 at the curved pipe portion 7, and the droplet 23 flows down while moving across the flow. Therefore, the gas film generated around the droplet 23 by the vaporization of the cooling liquid is removed, and the droplet 23 is rapidly solidified by the cooling liquid.
【００１２】冷却液流中の金属粉末は、冷却液と共に曲
管部７ 、排出管部８ を流下し、排出管部８ 末端よ
り分離容器１５に排出され、メッシュ部材１４によって
冷却液と分離される。メッシュ部材１４によって一次脱
液された金属粉末は同部材に沿って分離容器１５の側壁
開口から回収される。一方、メッシュ部材１４を通過し
た冷却液は、タンクに回収される。前記金属粉末は、順
次、遠心分離機等の適宜の脱液装置により脱液された後
、乾燥されて製品粉末となる。The metal powder in the coolant flow flows down the bent pipe section 7 and the discharge pipe section 8 together with the coolant, is discharged from the end of the discharge pipe section 8 into the separation container 15, and is separated from the coolant by the mesh member 14. Ru. The metal powder that has been primarily dehydrated by the mesh member 14 is collected from the side wall opening of the separation container 15 along the mesh member 14 . On the other hand, the coolant that has passed through the mesh member 14 is collected into the tank. The metal powder is sequentially dehydrated using an appropriate dehydrating device such as a centrifuge, and then dried to become a product powder.
【００１３】上記実施例においては、供給容器２ 内の
溶融金属２２は、圧媒を作用させて注入ノズル１１から
噴出させたが、圧媒を作用させることなく、溶融金属自
体の自重により容器下部の溶融金属を加圧状態とし、注
入ノズル１１から噴出させてもよい。尚、本発明は、Ａ
ｌ合金やＭｇ合金等の軽量金属粉末の製造に限らず、鉄
やその合金等の金属粉末の製造に適用できることは勿論
である。In the above embodiment, the molten metal 22 in the supply container 2 was jetted out from the injection nozzle 11 by the action of a pressure medium, but without the action of a pressure medium, the molten metal 22 was pushed out by its own weight into the lower part of the container. The molten metal may be put under pressure and jetted from the injection nozzle 11. In addition, the present invention is based on A
Of course, the present invention can be applied not only to the production of lightweight metal powders such as L alloys and Mg alloys, but also to the production of metal powders such as iron and its alloys.
【００１４】[0014]
【発明の効果】以上説明した通り、本発明の金属粉末の
製造方法によると、冷却液流に遠心力が作用する曲管部
を管体に設け、該曲管部に分断された溶滴を含む冷却液
流を流すので、溶滴の周りに冷却液の気化によって生じ
たガス膜が除去され、冷却液が直接接触するようになり
、急冷凝固した金属粉末が容易に得られる。Effects of the Invention As explained above, according to the method for producing metal powder of the present invention, the tube body is provided with a curved tube section on which centrifugal force acts on the coolant flow, and the separated droplets are disposed on the curved tube section. Since the containing cooling liquid stream is passed, the gas film produced by the vaporization of the cooling liquid around the droplets is removed, and the cooling liquid comes into direct contact with the droplets, so that rapidly solidified metal powder can be easily obtained.
【図１】実施例に係る金属粉末製造装置の要部断面説明
図である。FIG. 1 is an explanatory cross-sectional view of a main part of a metal powder manufacturing apparatus according to an example.
【図２】従来の金属粉末製造装置の要部断面図である。FIG. 2 is a sectional view of a main part of a conventional metal powder manufacturing apparatus.
１ 管体 ２ 供給容器 ３ ポンプ ７ 曲管部 １１ 注入ノズル ２１ 冷却液流 ２２ 溶融金属 ２３ 溶滴 1 Pipe body 2 Supply container 3 Pump 7 Bent pipe section 11 Injection nozzle 21 Cooling liquid flow 22 Molten metal 23 Droplets
Claims (1)
注入し、該冷却液流によって注入された溶融金属を分断
し、分断した溶滴を冷却液中で凝固させ、冷却液と金属
粉末とを分離する金属粉末の製造方法において、冷却液
流に遠心力が作用する曲管部を管体に設け、分断された
溶滴を含む冷却液流を該曲管部に流すことを特徴とする
金属粉末の製造方法。Claim 1: Injecting molten metal into a cooling liquid flow flowing through a tube, dividing the injected molten metal by the cooling liquid flow, solidifying the divided droplets in the cooling liquid, and separating the cooling liquid and the metal. A method for producing metal powder in which the metal powder is separated from powder, characterized by providing a curved tube section in the tube body on which a centrifugal force acts on the coolant flow, and allowing the coolant flow containing the separated droplets to flow through the curved tube section. A method for producing metal powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3101012A JP2672037B2 (en) | 1991-05-02 | 1991-05-02 | Method and apparatus for producing metal powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3101012A JP2672037B2 (en) | 1991-05-02 | 1991-05-02 | Method and apparatus for producing metal powder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04329805A true JPH04329805A (en) | 1992-11-18 |
| JP2672037B2 JP2672037B2 (en) | 1997-11-05 |
Family
ID=14289317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3101012A Expired - Lifetime JP2672037B2 (en) | 1991-05-02 | 1991-05-02 | Method and apparatus for producing metal powder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2672037B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6287362B1 (en) * | 1995-09-07 | 2001-09-11 | Mintek | Production of metal lumps and apparatus therefor |
| JP2006519099A (en) * | 2003-02-28 | 2006-08-24 | 財団法人電力中央研究所 | Fine particle production method and production apparatus |
| JP2014218724A (en) * | 2013-05-10 | 2014-11-20 | アルバック成膜株式会社 | Manufacturing apparatus of metal fine particles, and manufacturing method of metal fine particles |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60128204A (en) * | 1983-12-14 | 1985-07-09 | バツテル・デイベロプメント・コ−ポレ−シヨン | Manufacture of granular or powdery metal and alloy |
| JPS6442507A (en) * | 1987-08-10 | 1989-02-14 | Kubota Ltd | Production of quickly solidified metal powder |
-
1991
- 1991-05-02 JP JP3101012A patent/JP2672037B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60128204A (en) * | 1983-12-14 | 1985-07-09 | バツテル・デイベロプメント・コ−ポレ−シヨン | Manufacture of granular or powdery metal and alloy |
| JPS6442507A (en) * | 1987-08-10 | 1989-02-14 | Kubota Ltd | Production of quickly solidified metal powder |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6287362B1 (en) * | 1995-09-07 | 2001-09-11 | Mintek | Production of metal lumps and apparatus therefor |
| JP2006519099A (en) * | 2003-02-28 | 2006-08-24 | 財団法人電力中央研究所 | Fine particle production method and production apparatus |
| JP4793872B2 (en) * | 2003-02-28 | 2011-10-12 | 財団法人電力中央研究所 | Fine particle production method and production apparatus |
| JP2014218724A (en) * | 2013-05-10 | 2014-11-20 | アルバック成膜株式会社 | Manufacturing apparatus of metal fine particles, and manufacturing method of metal fine particles |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2672037B2 (en) | 1997-11-05 |
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