CN106670486A - Preparation method for aluminium alloy powder for near-net forming - Google Patents
Preparation method for aluminium alloy powder for near-net forming Download PDFInfo
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- CN106670486A CN106670486A CN201611174428.3A CN201611174428A CN106670486A CN 106670486 A CN106670486 A CN 106670486A CN 201611174428 A CN201611174428 A CN 201611174428A CN 106670486 A CN106670486 A CN 106670486A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/10—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying using centrifugal force
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Abstract
The invention discloses a preparation method for aluminium alloy powder for near-net forming. The preparation method comprises the following steps that (1) an aluminium alloy bar is fine finished to be an electrode bar with the diameter being 40-80 mm and the length being 300-800 mm; (2) the finished aluminium alloy electrode bar is placed in an airtight furnace chamber protected by inert gases and conducts high-speed rotation, the ends of the electrode bar are heated through a plasma gun to be melted, meanwhile, ultrasound vibration of 35-45 kHz is applied on the electrode bar, molten metal aluminium is thrown away from the ends of the electrode bar under the dual effect of centrifugal force and ultrasound, and liquid drops are rapidly cooled to be spherical particles in the environment of the inert gases and fall into a collecting device at the bottom of the furnace chamber; and (3) in the protection of the inert gases, prepared spherical aluminium alloy powder is subjected to screening treatment, and the spherical aluminium alloy powder with the needed particle size is obtained. By means of the preparation method, the spherical aluminium alloy powder with uniform particle size, high sphericity degree and no hollow powder is prepared in batches, and the application requirements of the aerospace field can be met.
Description
Technical field
The invention belongs to the preparing technical field of nonferrous metal powder, and in particular to a kind of near-net-shape Al alloy powder
Preparation method.
Background technology
Metallic aluminium has that fusing point is low, density is little, specific strength is higher, cold working and the spy such as welding performance is good, "dead"
Point, is widely used in the key areas such as Aero-Space, high-energy physics, aluminum alloy spare part demand particularly with complex shape
It is larger.Traditional handicraft cannot process excessively complicated shape, there are problems that spillage of material is larger.It is 3D printing, metal injection molded
Etc. the development of advanced near-net-shape technology, to produce Irregular Shaped Parts new approach is provided, and these advanced near nets into
Shape technology mainly adopts the spherical powder of good fluidity for raw material, and common Al alloy powder cannot meet this requirement.
To realize the nodularization of Al alloy powder, researcher prepares minute spherical aluminium alloy using water atomization or gas atomization
Powder, the method can realize prepared by subglobular Al alloy powder, but powder exist granularity difference big, hollow powder, special-shaped powder compared with
The shortcomings of many, low production efficiency, it is impossible to meet requirement of the advanced technologies such as 3D printing to Al alloy powder.
The content of the invention
To overcome above-mentioned the deficiencies in the prior art, it is an object of the invention to provide a kind of near-net-shape Al alloy powder
Preparation method, by the method batch particle size uniformity, high sphericity, the spherical Al alloy powder without hollow powder, energy are prepared
Meet the application demand of aerospace field.
For achieving the above object, the technical solution used in the present invention is：A kind of preparation side of near-net-shape Al alloy powder
Method, it is characterised in that comprise the following steps：
1）Aluminium alloy bars is finish-machined to into the electrode bar that a diameter of 40-80mm, length are 300-800mm, and roundness deviation is less than
0.1mm, linearity deviation is less than 0.1mm/m, and roughness is less than 1.6 μm；
2）Electrode bar after processing is placed in the sealed furnace room of inert gas shielding so as to turning with 10000-30000r/min
Fast to rotate at a high speed, adopt power melts end for 30-100kW plasma guns heating electrode stick end, while on electrode bar
Apply the ultrasonic vibration of 35-45kHz, motlten metal aluminium is got rid of under centrifugal force and ultrasonic wave double action from electrode stick end
Go out, and form fine drop, drop is quickly cooled to spheric granules in inert gas environment, falls into furnace chamber bottom collector
In；
3）Under inert gas shielding, screening process are carried out to obtained spherical Al alloy powder, obtain the spherical aluminum of desired particle size
Alloyed powder.
The particle mean size of described spherical Al alloy powder is 45 μm -250 μm.
Described step 2）Pulverizing process inert gas should be helium, argon gas or argon helium mixture, oxygen content in gas
0.01% is should be less than, powder oxygenation amount is 100-500ppm.
The beneficial effects of the present invention is：
The present invention melts aluminium by plasma rotating centrifugal atomization process under inert gas shielding using high powered plasma rifle
Change, under the conditions of ultrahigh rotating speed, the spherical Al alloy powder of good fluidity is prepared in batches, meet Aero-Space near-net-shape part
Application demand.Compared with aerosolization method, the present invention is obtained in that particle size uniformity, high sphericity, the height without hollow powder
The spherical Al alloy powder of quality, with mass production ability.
Description of the drawings
Fig. 1 is the stereoscan photograph of high-quality aluminum alloy powder of the present invention.
Fig. 2 is the high power scanned photograph of high-quality aluminum alloy powder of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is described in further detail with specific embodiment.
Embodiment 1
A kind of preparation method of near-net-shape Al alloy powder, comprises the following steps：
1）Aluminium alloy bars is finish-machined to into the electrode bar that a diameter of 40mm, length are 800mm, and roundness deviation 0.05mm, straight line
Degree deviation 0.08mm/m, 1.4 μm of roughness；
2）Aluminum alloy anode rod after processing is placed in sealed furnace room, furnace chamber adopts oxygen content for 0.001% inert gas shielding,
Make electrode bar and rotated at a high speed with the rotating speed of 20000r/min, adopting power for 40kW plasma guns heating electrode stick end makes end
Fusing, at the same on electrode bar apply 35kHz ultrasonic vibration, motlten metal aluminium under centrifugal force and ultrasonic wave double action from
Electrode stick end is thrown out of, and forms fine drop, and drop is quickly cooled to spheric granules in helium gas environment, falls into furnace chamber
In bottom collector；
3）Under helium gas protection, screening process are carried out to obtained spherical Al alloy powder, the spherical aluminum for obtaining desired particle size is closed
Bronze.
The particle mean size of described spherical Al alloy powder is 200 μm.
The oxygenation amount of described spherical Al alloy powder is 100ppm.
Embodiment 2
A kind of preparation method of near-net-shape Al alloy powder, comprises the following steps：
1）Aluminium alloy bars is finish-machined to into the electrode bar that a diameter of 60mm, length are 550mm, and roundness deviation 0.03mm, straight line
Degree deviation 0.05mm/m, 1.2 μm of roughness；
2）Aluminum alloy anode rod after processing is placed in sealed furnace room, furnace chamber adopts oxygen content and protects for 0.002% argon gas, makes
Electrode bar is rotated at a high speed with the rotating speed of 30000r/min, and adopt power melts end for 60kW plasma guns heating electrode stick end
Change, while applying the ultrasonic vibration of 40kHz on electrode bar, motlten metal aluminium is under centrifugal force and ultrasonic wave double action from electricity
Pole stick end is thrown out of, and forms fine drop, and drop is quickly being cooled to spheric granules in ar gas environment, falls into furnace chamber bottom
In portion's collector；
3）Under the protection of argon gas, screening process are carried out to obtained spherical Al alloy powder, the spherical aluminum for obtaining desired particle size is closed
Bronze.
The particle mean size of described spherical Al alloy powder is 100 μm.
The oxygenation amount of described spherical Al alloy powder is 300ppm.
Embodiment 3
A kind of preparation method of near-net-shape Al alloy powder, comprises the following steps：
1）Aluminium alloy bars is finish-machined to into the electrode bar that a diameter of 80mm, length are 300mm, and roundness deviation is less than 0.02mm,
Linearity deviation is less than 0.03mm/m, and roughness is less than 0.8 μm；
2）Aluminum alloy anode rod after processing is placed in the sealed furnace room of inert gas shielding so as to the rotating speed of 40000r/min
Rotate at a high speed, adopt power melts end for 80kW plasma guns heating electrode stick end, while applying on electrode bar
The ultrasonic vibration of 45kHz, motlten metal aluminium is thrown out of under centrifugal force and ultrasonic wave double action from electrode stick end, and is formed
Fine drop, drop is quickly cooled to spheric granules in the mixed-gas environment of helium and argon gas, falls into furnace chamber bottom collection
In device；
3）Under the protection of helium and the mixed gas of argon gas, screening process are carried out to obtained spherical Al alloy powder, obtain institute
Need the spherical Al alloy powder of granularity.
The particle mean size of described spherical Al alloy powder is 45 μm.
The oxygenation amount of described spherical Al alloy powder is 500ppm.
Claims (6)
1. a kind of preparation method of near-net-shape Al alloy powder, it is characterised in that comprise the following steps：
1）Aluminium alloy bars is finish-machined to into the electrode bar that a diameter of 40-80mm, length are 300-800mm, and roundness deviation is less than
0.1mm, linearity deviation is less than 0.1mm/m, and roughness is less than 1.6 μm；
2）Electrode bar after processing is placed in the sealed furnace room of inert gas shielding so as to turning with 10000-30000r/min
Fast to rotate at a high speed, adopt power melts end for 30-100kW plasma guns heating electrode stick end, while on electrode bar
Apply the ultrasonic vibration of 35-45kHz, motlten metal aluminium is got rid of under centrifugal force and ultrasonic wave double action from electrode stick end
Go out, and form fine drop, drop is quickly cooled to spheric granules in inert gas environment, falls into furnace chamber bottom collector
In；
3）Under inert gas shielding, screening process are carried out to obtained spherical Al alloy powder, obtain the spherical aluminum of desired particle size
Alloyed powder.
2. a kind of preparation method of near-net-shape Al alloy powder according to claim 1, it is characterised in that described ball
The particle mean size of shape Al alloy powder is 45 μm -250 μm.
3. a kind of preparation method of near-net-shape Al alloy powder according to claim 1, it is characterised in that described step
Rapid 2）Pulverizing process inert gas should be helium, argon gas or argon helium mixture, and oxygen content should be less than 0.01% in gas, powder
Oxygenation amount is 100-500ppm.
4. the preparation method of a kind of near-net-shape Al alloy powder according to claim 1, it is characterised in that including following
Step：
1）Aluminium alloy bars is finish-machined to into the electrode bar that a diameter of 40mm, length are 800mm, and roundness deviation 0.05mm, straight line
Degree deviation 0.08mm/m, 1.4 μm of roughness；
2）Aluminum alloy anode rod after processing is placed in sealed furnace room, furnace chamber adopts oxygen content for 0.001% inert gas shielding,
Make electrode bar and rotated at a high speed with the rotating speed of 20000r/min, adopting power for 40kW plasma guns heating electrode stick end makes end
Fusing, at the same on electrode bar apply 35kHz ultrasonic vibration, motlten metal aluminium under centrifugal force and ultrasonic wave double action from
Electrode stick end is thrown out of, and forms fine drop, and drop is quickly cooled to spheric granules in helium gas environment, falls into furnace chamber
In bottom collector；
3）Under helium protection, screening process are carried out to obtained spherical Al alloy powder, obtain the spherical aluminium alloy of desired particle size
Powder；
The particle mean size of described spherical Al alloy powder is 200 μm；
The oxygenation amount of described spherical Al alloy powder is 100ppm.
5. the preparation method of a kind of near-net-shape Al alloy powder according to claim 1, it is characterised in that including following
Step：
1）Aluminium alloy bars is finish-machined to into the electrode bar that a diameter of 60mm, length are 550mm, and roundness deviation 0.03mm, straight line
Degree deviation 0.05mm/m, 1.2 μm of roughness；
2）Aluminum alloy anode rod after processing is placed in sealed furnace room, furnace chamber adopts oxygen content and protects for 0.002% argon gas, makes
Electrode bar is rotated at a high speed with the rotating speed of 30000r/min, and adopt power melts end for 60kW plasma guns heating electrode stick end
Change, while applying the ultrasonic vibration of 40kHz on electrode bar, motlten metal aluminium is under centrifugal force and ultrasonic wave double action from electricity
Pole stick end is thrown out of, and forms fine drop, and drop is quickly being cooled to spheric granules in ar gas environment, falls into furnace chamber bottom
In portion's collector；
3）Under the protection of argon gas, screening process are carried out to obtained spherical Al alloy powder, the spherical aluminum for obtaining desired particle size is closed
Bronze；
The particle mean size of described spherical Al alloy powder is 100 μm；
The oxygenation amount of described spherical Al alloy powder is 300ppm.
6. the preparation method of a kind of near-net-shape Al alloy powder according to claim 1, it is characterised in that including following
Step：
1）Aluminium alloy bars is finish-machined to into the electrode bar that a diameter of 80mm, length are 300mm, and roundness deviation is less than 0.02mm,
Linearity deviation is less than 0.03mm/m, and roughness is less than 0.8 μm；
2）Aluminum alloy anode rod after processing is placed in the sealed furnace room of inert gas shielding so as to the rotating speed of 40000r/min
Rotate at a high speed, adopt power melts end for 80kW plasma guns heating electrode stick end, while applying on electrode bar
The ultrasonic vibration of 45kHz, motlten metal aluminium is thrown out of under centrifugal force and ultrasonic wave double action from electrode stick end, and is formed
Fine drop, drop is quickly cooled to spheric granules in the mixed-gas environment of helium and argon gas, falls into furnace chamber bottom collection
In device；
3）Under the protection of helium and the mixed gas of argon gas, screening process are carried out to obtained spherical Al alloy powder, obtain institute
Need the spherical Al alloy powder of granularity；
The particle mean size of described spherical Al alloy powder is 45 μm；
The oxygenation amount of described spherical Al alloy powder is 500ppm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611174428.3A CN106670486A (en) | 2016-12-19 | 2016-12-19 | Preparation method for aluminium alloy powder for near-net forming |
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| CN201611174428.3A CN106670486A (en) | 2016-12-19 | 2016-12-19 | Preparation method for aluminium alloy powder for near-net forming |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108941595A (en) * | 2018-08-07 | 2018-12-07 | 西安赛隆金属材料有限责任公司 | A kind of silver-colored and silver alloy powder preparation method |
| CN109926576A (en) * | 2018-06-07 | 2019-06-25 | 江西宝航新材料有限公司 | A kind of post-processing approach improving aluminium alloy 3D printing powder mobility |
| CN110899716A (en) * | 2019-12-17 | 2020-03-24 | 有研亿金新材料有限公司 | Low-oxygen spherical Al powder and preparation method thereof |
| CN111331147A (en) * | 2020-03-18 | 2020-06-26 | 甘肃省机械科学研究院有限责任公司 | Method for preparing AlSi9Mg ultrafine powder |
| CN111570813A (en) * | 2020-05-29 | 2020-08-25 | 西藏智材新材料有限公司 | Beryllium-aluminum alloy powder and preparation method and application thereof |
| CN115090891A (en) * | 2022-08-25 | 2022-09-23 | 西安赛隆增材技术股份有限公司 | Plasma rotating electrode atomization powder making equipment and powder making method |
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| CN103433499A (en) * | 2013-08-27 | 2013-12-11 | 湖南航天工业总公司 | Ultrasonic atomization preparation device and method for spherical metal powder |
| CN105624474A (en) * | 2016-04-11 | 2016-06-01 | 西安欧中材料科技有限公司 | Preparation method of superfine high-grade spherical EP741NP alloy powder |
| CN105665729A (en) * | 2016-04-11 | 2016-06-15 | 西安欧中材料科技有限公司 | High-density Ti2AlNb powder alloy near-net forming technology |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2000033653A (en) * | 1998-07-17 | 2000-02-02 | Sony Corp | Optical element and apparatus for producing the same |
| CN103433499A (en) * | 2013-08-27 | 2013-12-11 | 湖南航天工业总公司 | Ultrasonic atomization preparation device and method for spherical metal powder |
| CN105624474A (en) * | 2016-04-11 | 2016-06-01 | 西安欧中材料科技有限公司 | Preparation method of superfine high-grade spherical EP741NP alloy powder |
| CN105665729A (en) * | 2016-04-11 | 2016-06-15 | 西安欧中材料科技有限公司 | High-density Ti2AlNb powder alloy near-net forming technology |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109926576A (en) * | 2018-06-07 | 2019-06-25 | 江西宝航新材料有限公司 | A kind of post-processing approach improving aluminium alloy 3D printing powder mobility |
| CN108941595A (en) * | 2018-08-07 | 2018-12-07 | 西安赛隆金属材料有限责任公司 | A kind of silver-colored and silver alloy powder preparation method |
| CN110899716A (en) * | 2019-12-17 | 2020-03-24 | 有研亿金新材料有限公司 | Low-oxygen spherical Al powder and preparation method thereof |
| CN110899716B (en) * | 2019-12-17 | 2022-05-27 | 有研亿金新材料有限公司 | Low-oxygen spherical Al powder and preparation method thereof |
| CN111331147A (en) * | 2020-03-18 | 2020-06-26 | 甘肃省机械科学研究院有限责任公司 | Method for preparing AlSi9Mg ultrafine powder |
| CN111570813A (en) * | 2020-05-29 | 2020-08-25 | 西藏智材新材料有限公司 | Beryllium-aluminum alloy powder and preparation method and application thereof |
| CN115090891A (en) * | 2022-08-25 | 2022-09-23 | 西安赛隆增材技术股份有限公司 | Plasma rotating electrode atomization powder making equipment and powder making method |
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Application publication date: 20170517 |