JPH0325482B2 - - Google Patents
Info
- Publication number
- JPH0325482B2 JPH0325482B2 JP24551483A JP24551483A JPH0325482B2 JP H0325482 B2 JPH0325482 B2 JP H0325482B2 JP 24551483 A JP24551483 A JP 24551483A JP 24551483 A JP24551483 A JP 24551483A JP H0325482 B2 JPH0325482 B2 JP H0325482B2
- Authority
- JP
- Japan
- Prior art keywords
- molten
- metal
- droplets
- flakes
- molten metal
- 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
Links
- 239000002184 metal Substances 0.000 claims description 37
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000007789 gas Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 239000011810 insulating material Substances 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 238000000889 atomisation Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000009689 gas atomisation Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
- B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
- B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
- B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
Landscapes
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Description
【発明の詳細な説明】
技術分野
本発明は、フレーク状の金属粉末を製造する方
法に関する。詳しくは、ノズルから流出する金属
溶湯を霧化し、霧化した融滴を急冷して凝固させ
ることにより金属フレークを製造する方法に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a method for producing flaky metal powder. Specifically, the present invention relates to a method of manufacturing metal flakes by atomizing molten metal flowing out of a nozzle and rapidly cooling and solidifying the atomized molten droplets.
従来技術
従来の急冷凝固金属フレークの製造方法には、
例えば、米国アルコア社のフレーク・プロセス
（以下、噴霧ロール法という。）がある。この噴霧
ロール法は第１図に示すように、ガス・アトマイ
ズ装置と水冷回転ドラム（ロール）とを使用し、
ガス・アトマイズ装置で霧化された金属融滴を回
転している水冷ドラムに衝突させて急冷し、凝固
させてフレークに形成させる方法である。Prior Art Conventional methods for producing rapidly solidified metal flakes include:
For example, there is the flake process (hereinafter referred to as the spray roll method) manufactured by Alcoa Corporation in the United States. As shown in Figure 1, this spray roll method uses a gas atomizer and a water-cooled rotating drum (roll).
This is a method in which molten metal droplets atomized by a gas atomizer collide with a rotating water-cooled drum to rapidly cool and solidify them into flakes.
このような噴霧ロール法によつて急冷、凝固フ
レークを製造するには、まず金属溶湯の均一な霧
化を得ることが重要である。このことに関して、
ガス・アトマイズ装置によつて霧化を行なう場
合、以下にあげるような問題点がある。 In order to produce rapidly cooled and solidified flakes by such a spray roll method, it is important to first obtain uniform atomization of the molten metal. Regarding this,
When atomizing with a gas atomizer, there are the following problems.
(1) 均一な霧化、すなわち均一な融滴を得るのが
困難である。(1) It is difficult to obtain uniform atomization, that is, uniform melt droplets.
(2) アトマイズ媒にガスを用いるため、水冷ドラ
ム近傍でガスの乱れが発生し、これによつて融
滴のすべてを水冷ドラムに衝突させることが困
難となる。(2) Since gas is used as the atomizing medium, gas turbulence occurs near the water-cooled drum, making it difficult to cause all of the molten droplets to collide with the water-cooled drum.
(3) ガスと融滴との熱伝達によつて融滴の凝固が
進行して、融滴は水冷ドラムに衝突する前に、
凝固を完了しており、凝固粉末の全体中には、
102〜104℃／sec程度の冷却速度で凝固した非
フレーク状の粉末が混在する。（急冷凝固フレ
ークは104〜106℃／secの冷却速度で生成す
る。）
(4) ガス・アトマイズ装置で溶湯の均一霧化を得
るのが困難なため、融滴の粒度を調整すること
が困難である。(3) Solidification of the molten droplet progresses due to heat transfer between the gas and the molten droplet, and before the molten droplet collides with the water-cooled drum,
The coagulation has been completed, and the whole coagulated powder contains
Non-flake-like powder solidified at a cooling rate of about 10 2 to 10 4 °C/sec is mixed. (Rapidly solidified flakes are generated at a cooling rate of 10 4 to 10 6 °C/sec.) (4) Since it is difficult to obtain uniform atomization of the molten metal with a gas atomization device, the particle size of the molten droplets must be adjusted. is difficult.
目 的
本発明は、上記の問題点を解消して、均一でか
つ酸化の少ない、急冷凝固金属フレークを製造す
る方法を提供することを目的とするものである。Purpose The present invention aims to solve the above-mentioned problems and provide a method for producing uniform, rapidly solidified metal flakes with little oxidation.
構 成
本発明の要旨は、以下に記載するとおりのもの
である。Configuration The gist of the present invention is as described below.
ノズルから流出する金属溶湯に超音波振動を与
えて金属融滴の噴流を生成させ、該金属融滴を凝
固させることなく、その噴流を水冷回転ロールに
衝突させて該融滴を急冷し、凝固させて金属フレ
ークに生成させることを特徴とする急冷凝固金属
フレークの製造方法。 Ultrasonic vibration is applied to the molten metal flowing out of the nozzle to generate a jet of molten metal droplets, and without solidifying the molten metal droplets, the jet collides with a water-cooled rotating roll to rapidly cool and solidify the molten metal droplets. 1. A method for producing rapidly solidified metal flakes, comprising:
次に本発明を具体的に説明する。 Next, the present invention will be specifically explained.
第２図は本発明の方法に使用する装置の１例と
この装置の使用によつて製造される急冷凝固フレ
ークの生成過程を説明するものである。１は金属
溶湯の容器であつて、断熱材２からなる内筒と断
熱材のホルダー３としての外筒及び振動ノズル４
を有する底部で構成されている。金属溶湯５を収
容した容器１は、振動板６上に置かれ、その振動
板６上には、容器１の両側で超音波振動子７が設
けられている。８は高周波電源、９は冷却水導
管、１０は水冷回転ロールである。 FIG. 2 illustrates an example of the apparatus used in the method of the present invention and the process of producing rapidly solidified flakes produced by using this apparatus. Reference numeral 1 denotes a container for molten metal, which includes an inner cylinder made of a heat insulating material 2, an outer cylinder as a holder 3 for the heat insulating material, and a vibrating nozzle 4.
It consists of a bottom part with a A container 1 containing molten metal 5 is placed on a diaphragm 6, and ultrasonic transducers 7 are provided on the diaphragm 6 on both sides of the container 1. 8 is a high frequency power supply, 9 is a cooling water conduit, and 10 is a water-cooled rotating roll.
高周波電源６により超音波振動子７を作動させ
て超音波の振動を発生させる。この超音波振動
は、振動板６を介して振動ノズル４に加えられ、
更に容器１から溶湯５に伝わる。 The ultrasonic vibrator 7 is activated by the high frequency power source 6 to generate ultrasonic vibrations. This ultrasonic vibration is applied to the vibrating nozzle 4 via the diaphragm 6,
Furthermore, it is transmitted from the container 1 to the molten metal 5.
超音波振動を受けた金属溶湯５は振動ノズル４
の先端から流出し、超音波振動により霧化されて
金属融滴１１の噴流となる。この融滴１１は、凝
固することなく自由落下して溶融状態のままで水
冷回転ロール１０の表面に達し、衝突して急冷さ
れ凝固して金属フレーク１２となる。 The molten metal 5 subjected to ultrasonic vibration is passed through the vibrating nozzle 4
The metal molten droplets 11 flow out from the tip and are atomized by ultrasonic vibration to become a jet of metal molten droplets 11. The molten droplets 11 fall freely without solidifying, reach the surface of the water-cooled rotary roll 10 in a molten state, collide, rapidly cool, and solidify to become metal flakes 12.
急冷凝固フレーク１２の大きさは、金属融滴の
大きさを制御することにより、任意の大きさにす
ることができる。一方、金属融滴の大きさは、振
動ノズル４の内径と超音波振動子７の振動数、振
幅を制御することにより、任意に変えることがで
きる。 The size of the rapidly solidified flakes 12 can be set to any size by controlling the size of the molten metal droplets. On the other hand, the size of the metal molten droplet can be arbitrarily changed by controlling the inner diameter of the vibrating nozzle 4 and the frequency and amplitude of the ultrasonic vibrator 7.
効 果 本発明により以下のような効果が得られる。effect The present invention provides the following effects.
(1) 超音波により金属溶湯を噴霧することによつ
て、均一な金属の融滴が得られ、その結果均一
な金属フレークを得ることができる。(1) By spraying molten metal using ultrasonic waves, uniform molten metal droplets can be obtained, and as a result, uniform metal flakes can be obtained.
(2) 超音波の振動数・振幅を変えることにより、
フレークの大きさを容易に調整することができ
る。(2) By changing the frequency and amplitude of ultrasonic waves,
The size of flakes can be easily adjusted.
(3) 本発明の方法は真空中もしくは低圧の不活性
ガス中で行なうことができるため、フレークは
表面酸化の少ない、清浄なものとなる。更にア
トマイズ媒のガスを使用しないので、ガスによ
る伝熱がなく、これにより金属融滴の凝固を遅
らせることができ、金属融滴のすべてをフレー
クにすることができる。(3) Since the method of the present invention can be carried out in vacuum or in a low-pressure inert gas, the flakes will be clean with less surface oxidation. Furthermore, since no atomizing medium gas is used, there is no heat transfer due to the gas, which makes it possible to delay the solidification of the metal molten droplets and to turn all the metal molten droplets into flakes.
(4) 本発明によつて製造されるフレークは、水冷
回転ロール表面上で凝固するため、急冷凝固組
織（微細粒組織）となる。(4) The flakes produced according to the present invention solidify on the surface of a water-cooled rotating roll, so that they have a rapidly solidified structure (fine grain structure).
第１図は従来の噴霧ロール法を説明する図、第
２図は本発明の方法に使用する装置の１例と急冷
凝固フレークの生成過程を概略的に示す図であ
る。
１…金属溶湯容器、２…断熱材、３…断熱材ホ
ルダー、４…振動ノズル、５…金属溶湯、６…振
動板、７…超音波振動子、８…高周波電源、９…
冷却水導管、１０…水冷回転ロール、１１…金属
融滴、１２…急冷凝固フレーク。
FIG. 1 is a diagram illustrating a conventional spray roll method, and FIG. 2 is a diagram schematically showing an example of an apparatus used in the method of the present invention and the production process of rapidly solidified flakes. DESCRIPTION OF SYMBOLS 1...Metal molten metal container, 2...Insulating material, 3...Insulating material holder, 4...Vibration nozzle, 5...Metal molten metal, 6...Vibration plate, 7...Ultrasonic vibrator, 8...High frequency power supply, 9...
Cooling water conduit, 10... Water-cooled rotary roll, 11... Metal molten droplets, 12... Rapidly solidified flakes.
Claims (1)
与えて金属融滴の噴流を生成させ、該金属融滴を
凝固させることなく、その噴流を水冷回転ロール
に衝突させて該融滴を急冷し、凝固させて金属フ
レークに形成させることを特徴とする急冷凝固金
属フレークの製造方法。1 Applying ultrasonic vibration to the molten metal flowing out of the nozzle to generate a jet of molten metal droplets, and without solidifying the molten metal droplets, the jet collides with a water-cooled rotating roll to rapidly cool the molten droplets, A method for producing rapidly solidified metal flakes, which comprises solidifying them to form metal flakes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24551483A JPS60141808A (en) | 1983-12-28 | 1983-12-28 | Production of metallic flake solidified by quick cooling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24551483A JPS60141808A (en) | 1983-12-28 | 1983-12-28 | Production of metallic flake solidified by quick cooling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60141808A JPS60141808A (en) | 1985-07-26 |
| JPH0325482B2 true JPH0325482B2 (en) | 1991-04-08 |
Family
ID=17134807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24551483A Granted JPS60141808A (en) | 1983-12-28 | 1983-12-28 | Production of metallic flake solidified by quick cooling |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60141808A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2335628B (en) * | 1998-03-19 | 2001-09-05 | The Technology Partnership Plc | Droplet generator and method of operating a droplet generator |
-
1983
- 1983-12-28 JP JP24551483A patent/JPS60141808A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60141808A (en) | 1985-07-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6309711B1 (en) | Method for manufacturing a three-dimensional object | |
| JPS61221310A (en) | Method and apparatus for producing pulverous powder of metal or alloy or the like | |
| JPS59206067A (en) | Method and apparatus for atomizing molten metal | |
| US4238427A (en) | Atomization of molten metals | |
| SU1745106A3 (en) | Method for producing powder, mainly amorphous, and plant for its accomplishment | |
| AU2019351409A1 (en) | Droplet-by-droplet centrifugal atomization manner-based device and method for efficiently preparing low-melting-point spherical metal powders | |
| CN105252009A (en) | Manufacturing method for minuteness spherical titanium powder | |
| CN106925786B (en) | More uniform particle sizes' spherical powder batch preparation facilities and method based on the injection of homogeneous metal drop | |
| CN102335743B (en) | Ultrasonic spray-forming method | |
| JPH0325482B2 (en) | ||
| JPH0336205A (en) | Method and apparatus for manufacturing metal fine powder | |
| JPH02290245A (en) | Manufacture of powder material | |
| JP2001064702A (en) | Prodution of fine spherical metal powder | |
| JP3511082B2 (en) | Manufacturing method of metal fine powder | |
| JPH01191706A (en) | Method and apparatus for manufacturing metal fine powder | |
| JPH0232323B2 (en) | ||
| JPS6333507A (en) | Method and apparatus for producing fine spheroidal powder | |
| JPS60155607A (en) | Manufacture of metallic flake solidified by rapid cooling | |
| JPH064886B2 (en) | Cream solder manufacturing method | |
| JPH0713245B2 (en) | Method and apparatus for producing acicular amorphous metal powder | |
| JPH08209207A (en) | Production of metal powder | |
| JPS62112709A (en) | Production of metallic powder | |
| KR100321826B1 (en) | Method and apparatus for manufacturing fine grained powder such as cream powder using an ultra sonic wave | |
| WO1993013898A1 (en) | Production of atomized powder of quenched high-purity metal | |
| JPS62112710A (en) | Production of metallic powder |