JPH01104704A - Production of super quenched metal alloy powder - Google Patents
Production of super quenched metal alloy powderInfo
- Publication number
- JPH01104704A JPH01104704A JP25979287A JP25979287A JPH01104704A JP H01104704 A JPH01104704 A JP H01104704A JP 25979287 A JP25979287 A JP 25979287A JP 25979287 A JP25979287 A JP 25979287A JP H01104704 A JPH01104704 A JP H01104704A
- Authority
- JP
- Japan
- Prior art keywords
- molten
- grains
- molten metal
- metal
- powder
- 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
- 239000000843 powder Substances 0.000 title claims abstract description 27
- 229910001092 metal group alloy Inorganic materials 0.000 title claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 239000002184 metal Substances 0.000 claims abstract description 39
- 229910052751 metal Inorganic materials 0.000 claims abstract description 39
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 10
- 239000000956 alloy Substances 0.000 claims abstract description 10
- 239000011261 inert gas Substances 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 19
- 239000002245 particle Substances 0.000 claims description 15
- 229910001018 Cast iron Inorganic materials 0.000 claims 2
- 239000007789 gas Substances 0.000 abstract description 16
- 238000001816 cooling Methods 0.000 abstract description 5
- 238000010791 quenching Methods 0.000 abstract 1
- 230000000171 quenching effect Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 239000011148 porous material Substances 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910003271 Ni-Fe Inorganic materials 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000000112 cooling gas Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009689 gas atomisation Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000001513 hot isostatic pressing Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は溶湯供給管付き噴出口部により、溶湯を回転デ
ィスク上に噴出させ、上記回転ディスク上より、高圧噴
出不活性ガス（Ｈｅ、Ａｒ＋Ｎ２など）の噴出層中に飛
散させ急冷凝固させて金属合金粉末を製造する方法に関
するものである。Detailed Description of the Invention [Industrial Application Field] The present invention jets molten metal onto a rotating disk through a spout section with a molten metal supply pipe, and from above the rotating disk, high-pressure jetted inert gas (He, Ar + N2 The present invention relates to a method for producing metal alloy powder by scattering it in an ejected layer and rapidly solidifying it.
金属合金粉末応用製品の中、熱間静水圧圧縮による機械
部品成形、射出成形による複雑形状部品成形などに使用
する合金粉末として粒径が小さく。Among metal alloy powder application products, this alloy powder has a small particle size and is used for machine parts molding by hot isostatic pressing and complex-shaped parts by injection molding.
形状が球形となるものが最近要求される様になってきた
。金属粉末の製造方法として従来、酸化物還元法、電解
法、カー＆ニル法、アトマイズ法。Recently, there has been a demand for something with a spherical shape. Conventional methods for producing metal powder include oxide reduction method, electrolytic method, Carr & Nil method, and atomization method.
上記回転ディスク法等数多くの方法が開発されている。A number of methods have been developed, including the rotating disk method described above.
この中上記の要求条件を満足させ得る可能性のある方法
としてガスアトマイズ法と回転ディスク法が考えられ得
る。Among these methods, the gas atomization method and the rotating disk method can be considered as methods that have the possibility of satisfying the above-mentioned requirements.
しかしながら、従来のガスアトマイズ法による場合。 However, when using the conventional gas atomization method.
噴出口部よシ噴出される噴出流がアトマイズガスの環帯
を開口する様に該ガス層に突入し粉砕され、噴霧金属合
金として急冷される事を原理とする。この場合噴出溶湯
流を噴出高圧ガス層へ突入させるため。The principle is that the jet stream ejected from the jet port opens the annular zone of the atomized gas, enters the gas layer, is pulverized, and is rapidly cooled as an atomized metal alloy. In this case, to cause the jetted molten metal flow to rush into the jetted high-pressure gas layer.
高圧ガスでアトマイズされた噴霧金属合金の粉体の中に
はガスが巻き込まれた状態、換言すれば空孔をもつ状態
で凝固されるものもある。この方法で作製された粉体の
平均粒径は２０〜５０μｍと大きく１０μｍ以下のもの
は未だ作シ出されていない。Some atomized metal alloy powders that are atomized with high-pressure gas are solidified in a state in which gas is involved, in other words, in a state in which they have pores. The average particle size of the powder produced by this method is as large as 20 to 50 μm, and powders of 10 μm or less have not yet been produced.
他方回転ディスク法に於いては上記の様なガス巻き込み
による空孔は生じない。更に粉体形状は球形となる。し
かし該方法に於いてはその平均粒径は５０〜１００μｍ
と大きくなる事が広く知られている。上記の様な粒体の
場合、射出成形→脱パインディング→焼結の工程後得ら
れた成形体の相対密度を９５チ以上にする事はむづかし
い。これは機械的強度、磁気的性質を劣化させる原因の
１つとなる。On the other hand, in the rotating disk method, voids due to gas entrainment as described above do not occur. Furthermore, the powder shape becomes spherical. However, in this method, the average particle size is 50 to 100 μm.
It is widely known that it grows larger. In the case of the above-mentioned granules, it is difficult to achieve a relative density of 95 inches or more in the molded body obtained after the steps of injection molding, de-pinding, and sintering. This is one of the causes of deterioration of mechanical strength and magnetic properties.
そこで１本発明の目的は、従来の高圧不活性ガス噴出ア
トマイズ法および回転ディスク法等による超急冷金属合
金粉末の製造方法の欠点を除去し。Accordingly, one object of the present invention is to eliminate the drawbacks of conventional methods for producing ultra-quenched metal alloy powder using the high-pressure inert gas jet atomization method, the rotating disk method, and the like.
よシ品質のよい金属粉末の製造技術を確立する事にある
。即ち、粉体形状は球形、平均粒径１０μｍ以下そして
ガス巻き込みによる空孔が各粉体にない事を目標とする
。The objective is to establish a manufacturing technology for high-quality metal powder. That is, the aim is for each powder to have a spherical shape, an average particle size of 10 μm or less, and no pores due to gas entrainment.
本発明によれば、溶湯供給管付噴出口部より、溶湯を回
転ディスク上に噴出させてなる飛しょう湯粒を、更に回
転ディスク上より、高圧不活性ガスの噴出層中に飛散さ
せ急冷させて金属合金の粉末を製造する方法に於いて、
板部材を、前記飛しょう湯粒の飛しょう位置に設けるこ
とにより、前記飛しょう湯粒を更に微粉化することを特
徴とする超急冷合金粉末の製造方法が得られる。換言す
ればガス巻き込みによる空孔をもたない球状粉末を作製
するためには上記回転ディスク法を基本とし平均粒径を
１０μｍ以下とするために以下のようにする。According to the present invention, the molten metal is spouted onto the rotating disk from the spout portion with the molten metal supply pipe, and the droplets are further scattered from above the rotating disk into the jetting layer of high-pressure inert gas to be rapidly cooled. In a method for producing metal alloy powder,
By providing a plate member at a position where the flying hot water particles fly, a method for producing an ultra-quenched alloy powder is obtained, which is characterized in that the flying hot water particles are further pulverized. In other words, in order to produce a spherical powder without pores due to gas entrainment, the above-mentioned rotating disk method is used as a basis, and in order to make the average particle size 10 μm or less, the following procedure is performed.
溶湯噴出口部先端は回転ディスク直上１０〜１間・の位
置に固定される。溶湯は噴出口部より約０．５〜１ ｋ
ｙ／ｍ２の圧力で回転ディスク上に噴出される。The tip of the molten metal spout is fixed at a position between 10 and 1.5 mm directly above the rotating disk. The molten metal is approximately 0.5 to 1 kg from the spout part.
It is ejected onto a rotating disk at a pressure of y/m2.
回転ディスクは１０４〜１０” ｒ、ｐ、ｍ、の回転数
をもって回転させる。ここに於いて特に回転ディスクお
よび湯粒粉砕板には金属溶湯とのぬれ性のよくないセラ
ミック（例えばＳ ｉ ３Ｎ４＋ Ｓ ｔＣ＋ Ａｔ２
０３など）又は黒鉛材などが選らばれねばならない。回
転ディスク上に噴出された溶湯はディスク表面上で凝固
される事なく、シかも２．直ちに５０〜２００μｍの粒
径をもつ飛しょう湯粒となシ２回回転ディスク面よシ遠
心力によシ飛散される。尚、必らずしもディスクの先端
から飛散するとは限らない。その後、この飛散湯粒は板
部材たる湯粒粉砕板に打ち当たる事によって更に細かく
粉砕される。The rotating disk is rotated at a rotational speed of 104 to 10" r, p, m. In particular, the rotating disk and the hot water pulverizing plate are made of ceramic (for example, Si 3N4+ S) which has poor wettability with molten metal. tC+ At2
03) or graphite material, etc. must be selected. 2. The molten metal spouted onto the rotating disk may not solidify on the surface of the disk. Immediately, hot water droplets with a particle size of 50 to 200 μm are scattered by centrifugal force across the surface of the twice-rotated disk. Note that the particles do not necessarily scatter from the tip of the disk. Thereafter, the scattered hot water droplets are further crushed into fine particles by hitting a hot water droplet crushing plate, which is a plate member.
このとき回転ディスクおよび湯粒粉砕板に、溶湯は出来
るだけ熱を奪われない事が重要である。At this time, it is important that the molten metal does not lose as much heat as possible to the rotating disk and the molten metal crushing plate.
上記溶湯は湯粒粉砕板から飛散した後その外周辺に噴出
される高圧不活性ガス環帯層中に突入し。After the molten metal scatters from the molten metal crushing plate, it rushes into the high-pressure inert gas annular layer spouted around the outside.
これによって始めて急冷凝固される。This is the first time that it is rapidly solidified.
以下２本発明の実施例を図面を参照して説明する。 Hereinafter, two embodiments of the present invention will be described with reference to the drawings.
第１図及び第２図には本発明に関係する噴出口部周辺概
略を示す直径６ｃｍφのセラミックス製回転ディスク２
を約２．５ Ｘ １０’ｒｐｍの回転数をもって回転さ
せる。冷却用高圧Ａｒがスが噴出される。FIG. 1 and FIG. 2 show a ceramic rotating disk 2 with a diameter of 6 cmφ, which schematically shows the vicinity of the jet nozzle related to the present invention.
is rotated at a rotation speed of approximately 2.5 x 10' rpm. High-pressure Ar gas for cooling is ejected.
次に溶湯供給管６内で溶解された７８．５％Ｎｉ−Ｆｅ
合金溶湯を噴出させるために溶湯供給管６内をＡｒガス
でもって加圧する。最後に、噴出溶湯制御板７（カーボ
ン・ストツノや−）を打ち抜き、溶湯噴出口先端部４よ
シ溶湯を高速回転中のディスク２に向けて噴出させる。Next, 78.5% Ni-Fe was melted in the molten metal supply pipe 6.
In order to jet out the molten alloy, the inside of the molten metal supply pipe 6 is pressurized with Ar gas. Finally, the spouting molten metal control plate 7 (carbon stock) is punched out, and the molten metal is spouted from the molten metal spout tip 4 toward the disk 2 which is rotating at high speed.
該溶湯は上記ディスク２に到達すると、遠心力によって
ディスク２の中心近傍から１円周方向へ移動し始める。When the molten metal reaches the disk 2, it begins to move in one circumferential direction from near the center of the disk 2 due to centrifugal force.
しかしセラミックス（Ｓｉ５Ｎ４）型回転ディスクを用
いるとこれは溶湯との間に、なじみが悪く円板上で湯膜
をつくらす湯粒となって、比較的短い時間内にディスク
２を離れ飛散する。この湯粒はその上部に配設されてい
る板部材たる湯粒粉砕板１３に打ち尚シ、更に細かく粉
砕され、下方向に向きを変えて飛散する。However, when a ceramic (Si5N4) type rotating disk is used, the particles do not fit well with the molten metal and form hot water droplets that form a film on the disk, leaving the disk 2 within a relatively short time and scattering. The hot water droplets are crushed into a hot water droplet crushing plate 13, which is a plate member disposed above the hot water droplets, to be further finely crushed, and then turned downward and scattered.
該飛散湯粒は冷却用高圧Ａｒがス噴出層中に突入し急冷
凝固される。The scattered hot water droplets are rapidly solidified by high-pressure Ar for cooling into the soot ejection layer.
以上の工程を経て７８．５ ％ ＮｉＦｅ合金粉体は製
造された。製造条件は次の通シ゛である。Through the above steps, 78.5% NiFe alloy powder was manufactured. The manufacturing conditions are as follows.
ディスク回転数２．５ Ｘ １０’ ｒｐｍ、冷却用高
圧Ａｒ噴出ガス圧１００ ｋｇ７ｃｍ２．溶湯噴出圧０
．４ ｋｇ／ａｎ２゜溶湯温度１６００℃、溶湯先端噴
出温度１５８０℃、溶湯噴出部口径０．５φ泪２溶解量
１ ｋｇ／ｃｈ回収された７８，５％Ｎｉ−Ｆｅ合金粉
末の平均粒径は約７μｍ、形状は球形のものが得られた
。また電顕観察の結果、ガス巻き込みによる空孔は認め
られなかった。Disc rotation speed 2.5 x 10' rpm, high pressure Ar jet gas pressure for cooling 100 kg7cm2. Molten metal ejection pressure 0
．． 4 kg/an2゜ Molten metal temperature 1600℃, molten metal tip spout temperature 1580℃, molten metal spout diameter 0.5φ2 dissolution amount 1 kg/ch The average particle size of the recovered 78.5% Ni-Fe alloy powder is approximately A sample with a diameter of 7 μm and a spherical shape was obtained. Further, as a result of electron microscopic observation, no pores due to gas entrainment were observed.
回転ディスク法による従来の合金粉末の平均粒径は５０
〜２００μｍと非常に大きかった。本発明によって平均
粒径１０μｍ以下の、しかも巻き込みガスによる空孔を
もたない品質の高い超急冷金属合金の球状微粉末をつく
る新しい技術が開発された。The average particle size of conventional alloy powder produced by the rotating disk method is 50
It was very large, ~200 μm. According to the present invention, a new technique has been developed for producing high-quality spherical fine powder of ultra-quenched metal alloy with an average particle size of 10 μm or less and without pores caused by entrained gas.
この技術をもって射出成形による複雑形状部品。Complex-shaped parts are made by injection molding using this technology.
および熱間静水圧成形による機械部品等のプリホーム、
超電導材、半導体材等の新素材開発を可能ならしめる事
が出来る。and preforming of mechanical parts etc. by hot isostatic pressing,
This will enable the development of new materials such as superconducting materials and semiconductor materials.
第１図は、実験に用いられた本発明に係る合金粉末製造
装置の概念図、第２図は第１図に係る製造装置の噴出口
部周辺の原理模式図を示す。
１・・・ディスク駆動用モータ、２・・・回転ディスク
。
３・・・噴出口部本体支持台、４・・・噴出口先端部、
５・・・誘導加熱用黒鉛筒、６・・・溶湯供給管（ルッ
が部）。
７・・・噴出溶湯制御板、８・・・溶湯噴出用ガス供給
口。
９・・・噴出溶湯制御板支持台、１０・・・誘導加熱板
。
１１・・・高圧冷却ガス供給口、１２・・・高圧冷却ガ
ス噴出口、１３・・・溶湯粒粉枠板、１４・・・合金粉
末。
１５・・・高圧冷却噴出ガス、１６・・・噴出溶湯流。FIG. 1 is a conceptual diagram of an alloy powder manufacturing apparatus according to the present invention used in the experiment, and FIG. 2 is a schematic diagram of the principle around the ejection port of the manufacturing apparatus according to FIG. 1. 1... Disk drive motor, 2... Rotating disk. 3... Spout body support base, 4... Spout tip,
5... Graphite tube for induction heating, 6... Molten metal supply pipe (luggage part). 7...Gushing molten metal control board, 8...Mold metal spouting gas supply port. 9...Gushing molten metal control plate support stand, 10...Induction heating plate. 11... High pressure cooling gas supply port, 12... High pressure cooling gas outlet, 13... Molten metal powder frame plate, 14... Alloy powder. 15... High-pressure cooling jetting gas, 16... Spouting molten metal flow.
Claims (1)
上に噴出させてなる飛しょう湯粒を、更に回転ディスク
上より、高圧不活性ガスの噴出層中に飛散させ急冷させ
て、金属合金の粉末を製造する方法に於いて、板部材を
、前記飛しょう湯粒の飛しょう位置に設けることにより
、前記ひしょう湯粒を更に微粉化することを特徴とする
超急冷金属合金粉末の製造方法。(1) The molten metal is spouted onto a rotating disk from a spout with a molten metal supply pipe, and the droplets are further scattered from above the rotating disk into a jet layer of high-pressure inert gas to rapidly cool the metal. In the method for producing alloy powder, the production of ultra-quenched metal alloy powder is characterized in that the plate member is provided at the flying position of the cast iron particles to further pulverize the cast iron particles. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25979287A JPH01104704A (en) | 1987-10-16 | 1987-10-16 | Production of super quenched metal alloy powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25979287A JPH01104704A (en) | 1987-10-16 | 1987-10-16 | Production of super quenched metal alloy powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01104704A true JPH01104704A (en) | 1989-04-21 |
Family
ID=17339054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25979287A Pending JPH01104704A (en) | 1987-10-16 | 1987-10-16 | Production of super quenched metal alloy powder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01104704A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100370863B1 (en) * | 2000-07-26 | 2003-02-05 | 에드호텍(주) | method and apparatus for producing fine powder from molten liquid by high-pressure spray |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5438259A (en) * | 1977-08-31 | 1979-03-22 | Nippon Steel Corp | Preparation of long flat iron powder from molten steel utilizing cetrifugal force |
| JPS5785906A (en) * | 1980-09-19 | 1982-05-28 | United Technologies Corp | Metal powder producing device |
| JPS60114507A (en) * | 1981-11-04 | 1985-06-21 | ヨセフ エム ウエンツエル | Manufacture of metal fine powder |
| JPS60190503A (en) * | 1984-03-13 | 1985-09-28 | Daido Steel Co Ltd | Production of metallic powder |
-
1987
- 1987-10-16 JP JP25979287A patent/JPH01104704A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5438259A (en) * | 1977-08-31 | 1979-03-22 | Nippon Steel Corp | Preparation of long flat iron powder from molten steel utilizing cetrifugal force |
| JPS5785906A (en) * | 1980-09-19 | 1982-05-28 | United Technologies Corp | Metal powder producing device |
| JPS60114507A (en) * | 1981-11-04 | 1985-06-21 | ヨセフ エム ウエンツエル | Manufacture of metal fine powder |
| JPS60190503A (en) * | 1984-03-13 | 1985-09-28 | Daido Steel Co Ltd | Production of metallic powder |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100370863B1 (en) * | 2000-07-26 | 2003-02-05 | 에드호텍(주) | method and apparatus for producing fine powder from molten liquid by high-pressure spray |
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