CN1071614A - Secondary atomizer for double electrode arc melting - Google Patents
Secondary atomizer for double electrode arc melting Download PDFInfo
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- CN1071614A CN1071614A CN 92107174 CN92107174A CN1071614A CN 1071614 A CN1071614 A CN 1071614A CN 92107174 CN92107174 CN 92107174 CN 92107174 A CN92107174 A CN 92107174A CN 1071614 A CN1071614 A CN 1071614A
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- crucible
- arc melting
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Abstract
Secondary atomizer for double electrode arc melting is the secondary-atomizing chamber that is made of arc melting chamber, spray gun and the metal rotating disc by the transmission of Vacuum Magnetic coupler, and composition such as whirlwind powder aggregating device.Arc melting chamber is provided with the water-cooled metal crucible of two spherical crown forms, adopts major and minor two electrodes to melt respectively and be incubated, make alloy melt by spray gun and metal rotating disc continuously atomizing also rapid condensation become attritive powder.This apparatus structure compactness, reasonable in design, easy to operate, high-melting-point and highly active metal or alloy powder can be produced, and continuous production can be realized, enhance productivity.The gained powder size is thin, the purity height, and quality is good.
Description
The present invention is relevant with the special equipment of producing the metal or alloy powder.
The gas atomization technology has been widely used in the preparation of some metal or alloy powder.The crucible that when atomizing, places refractory material (as graphite, pottery etc.) to make alloy raw material, make alloy melting with electric induction furnace or fuel Heating, and it is overheated 100～150 ℃, inject previously baked bottom pour ladle to uniform temperature then, liquid stream flows into the spray wheel along leting slip a remark, at gas intersection point place, liquid stream is ground into thin dripping by gases at high pressure, simultaneously, atomization gas with between the metal liquid stream by heat exchange, make drop in flight course, be frozen into powder.High or the active bigger metal or alloy for fusing point, if adopt said apparatus, in atomization process, tend to atmosphere in the oxygen reaction and oxidized, also can or come off contaminated simultaneously because of the dissolving of crucible material.Inert gas atomizer or vacuum atomizing can reduce the pollution of medium, but crucible pollutes existence still." comment of world's material " (1991, Vol.36, P.87) No.3 discloses a kind of powder-making technique.In this technology, adopted the non-consumable vacuum arc melting, electrode can move up and down, when smelting titanium alloy, crucible bottom titanium wall keeps not penetration, but when melt is about to atomize, electrode is transferred near bath surface, make the titanium wall penetration of bottom, alloy melt is let slip a remark by crucible bottom and is flow to gas spray gun, is atomized into alloy powder in argon gas or helium.To the Ti-6Al-4V alloy powder of producing under given conditions, powder is spherical, and particle mean size is 190 μ m.This atomising device can be produced refractory metal or alloy powder, and powder generally is unlikely to pollute, yet this device gained powder is thicker, and generally greater than 100 μ m, condensation rate is also slower, simultaneously, the general molten bath of this device is less, is difficult for penetration, therefore, single furnace output is very low, is difficult to continuous production.
The present invention proposes a kind of atomising device of producing attritive powder continuously of meter, and the lower metal or alloy of this both aerosolizable fusing point of device can be produced refractory metal or alloy powder again, and can improve production efficiency and product quality.
Attritive powder atomising device of the present invention is a kind of integral device that adopts bipolar electric arc melting and secondary-atomizing.It is by working chamber (19), spray chamber (5), powder aggregating device (1,2,3), and composition such as whirligig (6,24,25,26), vacuum system (23), power distribution equipment.Two spherical water-cooled metal (for example copper or copper alloy) crucibles (11) are set in the working chamber, alloy raw material is delivered to crucible (11-I) by vacuum feed appliance (9) in batches and is located, main electrode (20) opens arc with material melting, melt flows into crucible (11-II), increase its flowability with auxiliary electrode (21) insulation, make melt flow into spray gun (10) from let slip a remark (17) of crucible (11-II) bottom smoothly, under the effect of high pressure draught, melt is atomized into fine droplets; Drop is accelerated, high-speed flight collides on the metal rotating disc (6) of rotation (3000～8000 rev/mins, adjustable continuously) at a high speed, and rapid condensation becomes fine powder to make it further pulverize also.Powder is delivered to whirlwind powder aggregating device (2) by meal outlet (4) and is collected along the inclined-plane (7) of spray chamber.Between whirlwind powder aggregating device (2) and air exhauster (1), pneumatic vacuum valve (3) is housed, this valve and atomization gas valve (8) interlock, guaranteeing that working chamber, spray chamber and powder aggregating device have sufficiently high vacuum before atomizing, and after the atomizing beginning, drain spray gas smoothly.The power supply of power distribution equipment connects major and minor electrode by the positive pole of DC arc welder, and negative pole connects crucible connector lug (13), forms arc heating system.
A notable feature of the present invention, be to have designed major and minor electrode, also the water-cooled metal crucible is designed to as shown in Figure 2 two spherical, wherein (SR1) is bigger for first crucible (11-I) spherical radius, be mainly used in the melting material, (SR2) is less for second crucible (11-II) spherical radius, and bottom centre is provided with and lets slip a remark, and (φ 2～8mm), are convenient to melt and flow into spray gun.Adopt welding or punching press to fuse between two crucibles; and first crucible (11-I) certain gradient is arranged; be convenient to melt and flow into second crucible (11-II) naturally; two crucible bottoms are provided with the cooling water cavity (15) that communicates, and are melted or damage when being unlikely melting refractory metal or alloy by recirculated cooling water protection crucible.
Another prominent features of the present invention is to be provided with a kind of have sufficient intensity and rigidity in spray chamber (5), is unlikely to because of contact high temperature and metal (for example copper or the copper alloy) rotating disc (6) that be out of shape by torsion; This rotating disc has good thermal conductivity, can in time distribute the heat of spray droplet, plays a part rapid condensation.This rotating disc is driven by direct current generator (26), forms high-speed rotating system by speed increaser (25) and Vacuum Magnetic coupler (24).This system has realized the vacuum transmission by Vacuum Magnetic coupler (24), can make metal rotating disc (6) rotation at a high speed, guarantees that again system has good high vacuum seal performance, is beneficial to prepare active bigger metal or alloy powder.
The present invention is owing to adopted vacuum feed appliance, main electrode melting, and the design of auxiliary electrode insulation, two spherical metallic crucible and secondary-atomizing has overcome the problem that melt is stagnated and gaged somebody because of condensation, thereby can produce the fine alloy powder continuously.Like this, improved production efficiency greatly, saved the energy, helped again improving the quality of products.And, this apparatus structure compactness, reasonable, easy to operate.
Description of drawings:
Fig. 1 is the cutaway view of atomising device, wherein: the 1-air exhauster; 2-whirlwind powder aggregating device; The pneumatic vacuum valve of 3-; The 4-meal outlet; The 5-spray chamber; The 6-rotating disc; The 7-inclined-plane; 8-atomization gas valve; 9-vacuum feed appliance; The 10-spray gun; The 11-crucible; The 19-working chamber; The 20-main electrode; The 21-auxiliary electrode; The 22-observation window; The 23-vacuum system; 24-Vacuum Magnetic coupler; The 25-speed increaser; The 26-dc motor.
Fig. 2 is two spherical cold-crucible cutaway views, wherein: 11-I-first crucible; 11-II-second crucible; The 12-sealing ring; 13-the connector lug (+utmost point); The 14-water inlet; The 15-cooling water cavity; The 16-sealing ring; 17-lets slip a remark; The 18-delivery port.
Embodiment: with spray TiAl alloy powder is example.At first the TiAl alloy raw material with certain proportioning is smelted into the little ingot casting of uniform TiAl alloy, progressively sends into the working chamber by the vacuum feed appliance again.When the working chamber is less than 3.5 * 10
-3Under the situation of Pa vacuum, pour 0.5～1 atmospheric argon gas, the major and minor electrifying electrodes of being made by tungsten-bast alloy rod (φ 15mm) opens arc, and two electrodes are respectively applied for melting and insulation.When alloy after the fusing of cold-crucible (11-I) that copper alloy is made, melt flows into crucible (11-II), and by (φ 3mm) inflow spray gun of leting slip a remark, open snifting valve (8) and gas bleeder valve (3) simultaneously, alloy liquid stream is atomized into fine droplets under the effect of high pressure (10MPa) argon gas, drop strikes on the copper dish of rotation (6000 rev/mins) at a high speed, further pulverizes and be condensed into fine powder.The gained powder mean particle sizes is～20 μ m, and oxygen content is that 600～1500ppm(promptly increases by 150～400ppm) on the alloy material basis, and condensation rate is
Claims (4)
1, secondary atomizer for double electrode arc melting, it is made up of arc melting chamber, spray chamber etc., it is characterized in that arc melting chamber is provided with the water-cooled metal crucible of two spherical crown forms, adopt major and minor two electrodes to melt respectively and be incubated, at spray chamber by spray gun and metal rotating disc, make melt continuously atomizing become attritive powder with rapid condensation and be collected in the whirlwind powder aggregating device.
2, device according to claim 1, the water-cooled metal crucible that it is characterized in that two spherical crown forms is designed to spherical radius and does not wait, the crucible bottom is provided with the cooling water cavity that communicates, and first crucible certain gradient is arranged, the second crucible bottom center is provided with lets slip a remark, and two crucibles adopt welding or punching press to fuse.
3, device according to claim 1 is characterized in that the metal rotating disc is driven by direct current generator, forms high-speed rotating system by speed increaser and Vacuum Magnetic coupler.
4, device according to claim 1 is characterized in that pneumatic vacuum valve (3) and atomization gas valve (8) interlock between whirlwind powder aggregating device and air exhauster.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92107174 CN1028074C (en) | 1992-10-07 | 1992-10-07 | Secondary atomizer for double electrode arc melting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92107174 CN1028074C (en) | 1992-10-07 | 1992-10-07 | Secondary atomizer for double electrode arc melting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1071614A true CN1071614A (en) | 1993-05-05 |
| CN1028074C CN1028074C (en) | 1995-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92107174 Expired - Fee Related CN1028074C (en) | 1992-10-07 | 1992-10-07 | Secondary atomizer for double electrode arc melting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1028074C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1311898C (en) * | 2001-10-29 | 2007-04-25 | 法依鲁特株式会社 | Method and apparatus for the production of metal powder |
| CN100457336C (en) * | 2004-07-30 | 2009-02-04 | 昆明贵金属研究所 | Preparation method of special metal or alloy powder and its device |
| CN102407338A (en) * | 2011-12-06 | 2012-04-11 | 中南大学 | Gas atomization device for preparing superfine spherical metal powder with low oxygen content |
| US8931710B2 (en) | 2011-07-14 | 2015-01-13 | Dedert Corporation | Rotary atomizer having electro-magnetic bearings and a permanent magnet rotar |
| CN105680014A (en) * | 2016-01-27 | 2016-06-15 | 柳州豪祥特科技有限公司 | Preparation method for tin-copper alloy powder |
| CN105665730A (en) * | 2016-04-11 | 2016-06-15 | 西安赛隆金属材料有限责任公司 | Device and method for preparing spherical metal powder |
| CN107695344A (en) * | 2017-09-08 | 2018-02-16 | 张家港创博金属科技有限公司 | Composition metal bead preparation method and device |
-
1992
- 1992-10-07 CN CN 92107174 patent/CN1028074C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1311898C (en) * | 2001-10-29 | 2007-04-25 | 法依鲁特株式会社 | Method and apparatus for the production of metal powder |
| CN100457336C (en) * | 2004-07-30 | 2009-02-04 | 昆明贵金属研究所 | Preparation method of special metal or alloy powder and its device |
| US8931710B2 (en) | 2011-07-14 | 2015-01-13 | Dedert Corporation | Rotary atomizer having electro-magnetic bearings and a permanent magnet rotar |
| CN102407338A (en) * | 2011-12-06 | 2012-04-11 | 中南大学 | Gas atomization device for preparing superfine spherical metal powder with low oxygen content |
| CN105680014A (en) * | 2016-01-27 | 2016-06-15 | 柳州豪祥特科技有限公司 | Preparation method for tin-copper alloy powder |
| CN105680014B (en) * | 2016-01-27 | 2019-02-01 | 柳州豪祥特科技有限公司 | A kind of preparation method of gun-metal powder |
| CN105665730A (en) * | 2016-04-11 | 2016-06-15 | 西安赛隆金属材料有限责任公司 | Device and method for preparing spherical metal powder |
| CN107695344A (en) * | 2017-09-08 | 2018-02-16 | 张家港创博金属科技有限公司 | Composition metal bead preparation method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1028074C (en) | 1995-04-05 |
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