CN101767202A - Method for preparing high-temperature alloy GH4648 prills by adopting plasma auxiliary rotary electrode - Google Patents
Method for preparing high-temperature alloy GH4648 prills by adopting plasma auxiliary rotary electrode Download PDFInfo
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- CN101767202A CN101767202A CN201010013746A CN201010013746A CN101767202A CN 101767202 A CN101767202 A CN 101767202A CN 201010013746 A CN201010013746 A CN 201010013746A CN 201010013746 A CN201010013746 A CN 201010013746A CN 101767202 A CN101767202 A CN 101767202A
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Abstract
The invention relates to a method for preparing high-temperature alloy GH4648 metal spherical powder by adopting a plasma auxiliary rotary electrode centrifuging process. The method comprises the following steps of: generating a glow discharge plasma arc between a plasma auxiliary electrode and a consumption-type electrode made of rotary cylindrical high-temperature alloy GH4648 metal in a closed container protected by inert gas; forming droplets at one section of the high-temperature alloy GH4648 metal electrode close to the plasma arc by high temperature which is generated by the plasma arc; flinging the droplets out by centrifugal force; cooling the high-temperature alloy GH4648 metal droplets in air and solidifying into spheres in the inert atmosphere environment of the closed container; and collecting the high-temperature alloy GH4648 prills. The method changes process parameters so that high-temperature alloy GH4648 prills with an average sphere diameter from 0.05-1.2 mm and better monodispersity are obtained, have favorable degree of sphericity, lower malformed particle proportion and controllable sphere diameters and can be used in the field of a laser three-dimensional forming process for preparing special parts of an aerospace craft.
Description
Technical field
The present invention relates to technical field of metal material preparation, particularly a kind of method that adopts the auxiliary rotation electrode centrifuging process of plasma to prepare high temperature alloy GH4648 prill, the high temperature alloy GH4648 prill that it prepares can be used for laser stereoforming, plasma coated technology.Be applied to the structural material of aerospace field.
Background technology
Country's space flight special material and technical study institute, solidification technology National Key Laboratory, the laser stereoforming technology of the particular component design that requires for fields such as aerospaces, the high temperature alloy GH4648 prill that need that a kind of sphere diameter is little, good sphericity, monodispersity is good is as a kind of functional form special material.
And it is reported that the domestic not production of this kind product at present has gas atomization technology to prepare similar sphere material abroad, claim atomization.This method basic principle is to utilize vessel space, in conjunction with molten atomizing technology, the high temperature alloy GH4648 prill that obtains, there is following problem if be applied to laser stereoforming technology: one, the high temperature alloy GH4648 prill of atomization preparation, can't carry out the control of valid interval particle diameter.Two, the high temperature alloy GH4648 prill sphericity of atomization preparation is bad, and oval ratio and lopsided particle ratio are about 85%.Three, the high temperature alloy GH4648 prill individuality of atomization preparation has a large amount of pores, bad mechanical strength.The high temperature alloy GH4648 prill of atomization preparation at present can not satisfy the laser stereoforming technological requirement.
Summary of the invention
The present invention is directed to the high temperature alloy GH4648 prill of external existing atomization preparation, can not satisfy the laser stereoforming arts demand, purpose provides a kind of method that adopts plasma rotating electrode to prepare high temperature alloy GH4648 prill, the high temperature alloy GH4648 prill that this method prepares can satisfy national space flight special material and technical study institute, solidification technology National Key Laboratory, a kind of sphere diameter of the laser stereoforming arts demand that the particular component that requires for fields such as aerospaces designs is little, good sphericity, the high temperature alloy GH4648 prill material that monodispersity is good.
Specifically; a kind of method that adopts plasma rotating electrode to prepare high temperature alloy GH4648 prill; it is in the closed container of an inert gas shielding; utilize the heavy current of low pressure; columniform in a plasma auxiliary electrode and a rotation by high temperature alloy GH4648 metal; small space between the consumption-type electrode of making produces glow discharge; promptly produce plasma arc; the high temperature that is produced by plasma arc makes one section of the close plasma arc of electrode to enter molten condition; form the droplet of high temperature alloy GH4648 metal; the centrifugal force that the electrode that utilizes rotation to feed rotates generation at a high speed throws away droplet; droplet obtains high temperature alloy GH4648 prill in the inert gas environment hollow cold curing globulate of closed container through the container bottom collection.
Preparation technology's flow process of high temperature alloy GH4648 metal electrode is among the present invention:
(1), by the chemical analysis proportioning high temperature alloy GH4648 metal of real material requirement, obtain the founding raw material.
(2), the founding raw material that proportioning is qualified carries out vacuum melting, obtains relative density at the ingot shape blank more than 85%;
(3), the ingot shape blank of vacuum melting is forged by heat, obtain relative density greater than 98% high temperature alloy GH4648 metal bar;
(4), the high temperature alloy GH4648 metal bar material after heat is forged, through the roughing of general lathe and the fine finishining of accurate digital control lathe, obtain meeting the high temperature alloy GH4648 metal electrode that the auxiliary rotation electrode centrifuging process of plasma requires, electrode diameter is at 40.mm-50.mm, and length is at 650mm-700mm.
In the technology of the present invention, each parameter is controlled to be: vacuum is not for being higher than 5*10 in the closed container of inert gas shielding
-3Pa; Electric current 2000A-2300A on the electrode, voltage 60V-85V; 9000-12000 revolutions per second of electrode rotating speed, feeding rate 0.8mm/ second; The plasma arc temperature is at 9500-11000 ℃.
Beneficial effect of the present invention is:
1, the high temperature alloy GH4648 prill sphericity and the monodispersity of this method preparation are good, the deformity particle is than low, can satisfy national space flight special material and technical study institute, and solidification technology National Key Laboratory, be the particular component that fields such as aerospace require, a kind of sphere diameter of the laser stereoforming arts demand of design is little, good sphericity, the little ball material of high temperature alloy GH4648 metallized metal that monodispersity is good.This method can realize the sphere diameter of bead is controlled by diameter and the plasma glow current intensity of adjusting rotation electrode rotating speed, high temperature alloy GH4648 metal electrode, therefore can provide the high temperature alloy GH4648 prill product of different sphere diameters as required.
2, this flouring technology have that the control of compact equipment, technological parameter is simple, powder size narrow range, the smooth cleaning of powder particle surface and production efficiency advantages of higher.The high temperature alloy GH4648 prill of this method preparation has good sphericity, single decentralized, higher mechanical properties, can satisfy national space flight special material and technical study institute, and solidification technology National Key Laboratory, a kind of sphere diameter of the laser stereoforming arts demand of the particular component design that requires for fields such as aerospaces is little, good sphericity, high temperature alloy GH4648 prill material that monodispersity is good.
Description of drawings
Fig. 1 is a process unit schematic diagram of the present invention.
Wherein parts 1 are used tungsten electrode for plasma is auxiliary; parts 2 are high temperature alloy GH4648 metal electrode; parts 3 are the airtight container chamber of inert gas shielding; parts 4 are the external protective equipment of exhaust outlet; parts 5 are the external inertia source of the gas of air taking port, and parts 6 are for driving high temperature alloy GH4648 metal electrode motor rotating.
The specific embodiment:
The method that adopts the auxiliary rotation electrode of plasma to prepare high temperature alloy GH4648 prill is implemented according to following steps:
(1) preparation of anode electrode rod: high temperature alloy GH4648 metal is refined into the specification bar, then, it is finish-machined to changes the motor rod that the plasma gun rotation electrode that runs up is produced smooth operation in the equipment movable sealing of spherical powder at 9000-12000 each second again; Preparation technology's flow process of electrode bar is: a, by the chemical analysis proportioning high temperature alloy GH4648 metal of real material requirement obtains the founding raw material; B, the founding raw material that proportioning is qualified carry out vacuum melting, obtain relative density at the ingot shape blank more than 85%; C, the ingot shape blank of vacuum melting is forged by heat, obtained relative density greater than 98% high temperature alloy GH4648 metal bar; D, the high temperature alloy GH4648 metal bar material after heat forged, through the roughing of general lathe and the fine finishining of accurate digital control lathe, obtain meeting the high temperature alloy GH4648 metal electrode that the auxiliary rotation electrode centrifuging process of plasma requires, electrode diameter is at 40.mm-50.mm, and length is at 650mm-700mm.
(2) fusing powder process: electrode bar is applied 2000A-2300A, the low-voltage, high-current of 60V-85V, make it in the melting chamber of high vacuum, high temperature melting with the generation of plasma gun cathode arc, and utilize electrode bar self to rotate the powerful centrifugal force of generation at a high speed, and high temperature alloy GH4648 metal moment of fusing is dished out obtains tiny prill, and tiny prill is the moment cooling in being full of the melting chamber of argon gas, and lean on gravity to fall voluntarily, collect the receipts cage.
Each parameter of step (2) is controlled to be: vacuum is not for being higher than 5*10 in the closed container of inert gas shielding
-3Pa; Electric current 2000-2300A on the electrode, voltage 60-85V; 9000-12000 revolutions per second of electrode rotating speed, feeding rate 0.8mm/ second; The plasma arc temperature is at 9500-11000 ℃.
The diameter of the high temperature alloy GH4648 prill that method for preparing obtains is 0.05mm-1.2mm.
Claims (5)
1. one kind is adopted plasma to assist rotation electrode to prepare the method for high temperature alloy GH4648 prill; it is characterized in that in the closed container of an inert gas shielding; the heavy current of utilizing low pressure is columniform by high temperature alloy GH4648 metal a plasma auxiliary electrode and a rotation; small space between the consumption-type alloy electrode of making produces glow discharge; promptly produce plasma arc; the high temperature that is produced by plasma arc makes one section of the close plasma arc of high temperature alloy GH4648 metal electrode to enter molten condition; form the droplet of high temperature alloy GH4648 metal; the high temperature alloy GH4648 metal electrode that utilizes rotation to feed rotates the centrifugal force of generation at a high speed; the droplet of high temperature alloy GH4648 metal is thrown away; the droplet of high temperature alloy GH4648 metal obtains high temperature alloy GH4648 prill in the inert ambient environment hollow cold curing globulate of closed container through the container bottom collection.
2. the auxiliary rotation electrode of a kind of plasma according to claim 1 prepares the method for high temperature alloy GH4648 prill, it is characterized in that preparation technology's flow process of high temperature alloy GH4648 metal electrode is:
(1), by the chemical analysis proportioning high temperature alloy GH4648 metal of standard material requirement, obtain the founding raw material;
(2), the founding raw material that proportioning is qualified carries out vacuum melting, obtains relative density at the ingot shape blank more than 85%;
(3), the ingot shape blank of vacuum melting is forged by heat, obtain relative density greater than 98% high temperature alloy GH4648 metal bar;
(4), the high temperature alloy GH4648 metal bar material after heat forged is through the roughing of general lathe, the fine finishining with the accurate digital control lathe obtains meeting the high temperature alloy GH4648 metal electrode that the auxiliary rotation electrode centrifuging process of plasma requires again.
3. the auxiliary rotation electrode of a kind of plasma according to claim 2 prepares the method for high temperature alloy GH4648 prill, it is characterized in that high temperature alloy GH4648 metal electrode diameter at 40.mm-50.mm, and length is at 650mm-700mm.
4. the auxiliary rotation electrode of a kind of plasma according to claim 1 prepares the method for high temperature alloy GH4648 prill, and the diameter that it is characterized in that making high temperature alloy GH4648 prill is 0.05mm-1.2mm.
5. the auxiliary rotation electrode of a kind of plasma according to claim 1 prepares the method for high temperature alloy GH4648 prill, it is characterized in that vacuum is not for being higher than 5*10 in the closed container of inert atmosphere protection
-3Pa; Electric current 2000A-2300A on the electrode, voltage 60V-85V; 9000-12000 revolutions per second of high temperature alloy GH4648 metal electrode rotating speed, feeding rate 0.8mm/ second; The plasma arc temperature is at 9500-11000 ℃.
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| CN201010013746A CN101767202A (en) | 2010-01-15 | 2010-01-15 | Method for preparing high-temperature alloy GH4648 prills by adopting plasma auxiliary rotary electrode |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103785846A (en) * | 2014-01-23 | 2014-05-14 | 西安欧中材料科技有限公司 | Method for preparing titanium alloy spherical powder at all levels |
| US9284210B2 (en) | 2014-03-31 | 2016-03-15 | Corning Incorporated | Methods and apparatus for material processing using dual source cyclonic plasma reactor |
| CN105817636A (en) * | 2015-01-09 | 2016-08-03 | 蔡小魁 | Method for preparing metal powder for 3D printing through rotating electrode with assist of plasmas |
| CN106232548A (en) * | 2014-03-31 | 2016-12-14 | 康宁公司 | For the method and apparatus using the heat plasma reactor according of atmospheric pressure to carry out material process |
| US9550694B2 (en) | 2014-03-31 | 2017-01-24 | Corning Incorporated | Methods and apparatus for material processing using plasma thermal source |
| US10167220B2 (en) | 2015-01-08 | 2019-01-01 | Corning Incorporated | Method and apparatus for adding thermal energy to a glass melt |
-
2010
- 2010-01-15 CN CN201010013746A patent/CN101767202A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103785846A (en) * | 2014-01-23 | 2014-05-14 | 西安欧中材料科技有限公司 | Method for preparing titanium alloy spherical powder at all levels |
| US9284210B2 (en) | 2014-03-31 | 2016-03-15 | Corning Incorporated | Methods and apparatus for material processing using dual source cyclonic plasma reactor |
| CN106232548A (en) * | 2014-03-31 | 2016-12-14 | 康宁公司 | For the method and apparatus using the heat plasma reactor according of atmospheric pressure to carry out material process |
| US9533909B2 (en) | 2014-03-31 | 2017-01-03 | Corning Incorporated | Methods and apparatus for material processing using atmospheric thermal plasma reactor |
| US9550694B2 (en) | 2014-03-31 | 2017-01-24 | Corning Incorporated | Methods and apparatus for material processing using plasma thermal source |
| US9908804B2 (en) | 2014-03-31 | 2018-03-06 | Corning Incorporated | Methods and apparatus for material processing using atmospheric thermal plasma reactor |
| CN106232548B (en) * | 2014-03-31 | 2019-12-27 | 康宁公司 | Method and apparatus for material processing using atmospheric thermal plasma reactor |
| US10167220B2 (en) | 2015-01-08 | 2019-01-01 | Corning Incorporated | Method and apparatus for adding thermal energy to a glass melt |
| CN105817636A (en) * | 2015-01-09 | 2016-08-03 | 蔡小魁 | Method for preparing metal powder for 3D printing through rotating electrode with assist of plasmas |
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Open date: 20100707 |