CN109202095A - Metal material based on electron-beam melting is centrifuged milling method - Google Patents
Metal material based on electron-beam melting is centrifuged milling method Download PDFInfo
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- CN109202095A CN109202095A CN201811333952.XA CN201811333952A CN109202095A CN 109202095 A CN109202095 A CN 109202095A CN 201811333952 A CN201811333952 A CN 201811333952A CN 109202095 A CN109202095 A CN 109202095A
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- base material
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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
Abstract
The invention discloses the metal materials based on electron-beam melting to be centrifuged milling method, using electron beam as heat source, transmits heat to base material metal surface using electron beam irradiation and forms molten bath on base material metal；Melt is broken into droplet using the centrifugal force of base material metal rotation simultaneously and is then frozen into powder.The present invention is using electron beam as heat source, using beam power, electron beam rotary scanning angular speed and base material metal angular velocity of rotation as the controling parameter of heat input；Heat is quickly transmitted to base material metal surface using electron beam irradiation and forms molten bath, and pool size is accurately controlled by regulation heat input；Melt is broken into droplet using base material metal high-speed rotating centrifugal force and is then frozen into powder simultaneously, the powder size control for being centrifuged powder processed is realized under the coupling regulation of surface temperature of molten pool, base material metal angular velocity of rotation and pool size.
Description
Technical field
The present invention relates to metal material comminution process technical fields, and in particular to based on the metal material of electron-beam melting from
Heart milling method.
Background technique
Metal powder has important use in industries such as increasing material manufacturing, powder metallurgy, Electronic Packagings.Centrifugal atomizing is common
One of high-test metal powder preparation method, be initially to be developed by Pratt&Whitney aircraft manufacturing company of the U.S..Due to
Its unique powder size, the controllability of pattern and spatter property and low in cost and be constantly valued by people, oneself becomes
A kind of important method of metal or alloy powder is prepared at present.The ground such as the current country, Japan have used centrifugal atomization to carry out ball
The production of shape solder powder.
Rotating disk centrifugal atomizatio is the one kind for being centrifuged powder processed, its basic process is: molten liquid flows through guiding device and flows to
The center of rotating disk, by the centrifugal effect of getting rid of, molten melt drop, which is fractured into fine droplets and is cooled in flight course, (to be situated between
Matter N2) it is frozen into powder.In the process, molten metal tangentially flies out along garden plate edge under the influence of centrifugal force, drop it
Between have no making contact each other, not by the effect of deformation force before solidification, under the action of surface tension, be shrunk to spherical shape,
I.e. cooled and solidified is reached before spray chamber wall, so as to keep the spherical shape of rule.Wherein, disc rotation speed and disk diameter
It is the core of entire atomization system, is the key factor for influencing particle size.In addition, the material and superficiality of disk
Energy, the molten metal degree of superheat and flow velocity, protective atmosphere and molten melt drop cooling stroke and speed etc. are all the key that prepare control
Technological parameter.Compared with gas atomization, metal powder is prepared with centrifugal atomization, control atmosphere is relatively easy, and product is spherical
It spends, degree of oxidation is small, and yield rate is higher, and yield is big.
Traditional centrifugation milling method all suffers from that melt sizes are random, powder diameter scope control is difficult, are difficult to prepare difficulty
The problems such as fine powder of molten metal.
Summary of the invention
It is that the present invention can prepare gold using electron beam as heat source in the environment of high vacuum in view of the above technical problems
Belong to powder, influence of the cavity atmosphere to powder impurity component and sphericity can be further reduced, powder diameter model may be implemented
The regulation enclosed is prepared suitable for the powder of refractory metal and noble metal, and the quality for further increasing metal powder has weight
Want meaning.
The present invention is achieved through the following technical solutions:
Metal material centrifugation milling method based on electron-beam melting utilizes electron beam irradiation using electron beam as heat source
Heat is transmitted to base material metal surface and molten bath is formed on base material metal；It simultaneously will using the centrifugal force of base material metal rotation
Melt is broken into droplet and is then frozen into powder.
Further, the irradiation scanning track of the electron beam is circle, and electron beam is female along metal with a fixed angular speed
Material direction of rotation radial spoke is according to scanning；When the angular speed of electron beam rotary scanning is greater than base material metal angular velocity of rotation, electron beam
Opposing metallic base material direction of rotation generates positive displacement；When the angular speed of electron beam rotary scanning is less than base material metal rotation angle
Speed, electron beam opposing metallic base material direction of rotation generate reversed displacement.
Further, by regulation heat input controling parameter to control pool size size.
Further, the heat input controling parameter includes beam power, electron beam rotary scanning angular speed and metal
Base material angular velocity of rotation.
The size regulation in molten bath is realized by the adjustment of regulation heat input parameter, wherein the controling parameter of heat input is electronics
Beam power, electron beam rotary scanning angular speed and base material angular velocity of rotation；It improves beam power, reduce electron beam rotary scanning
Difference between angular speed and base material angular velocity of rotation can promote the heat input of unit time unit area, to increase molten
Pond body product；Conversely, reducing beam power, improving the difference between electron beam rotary scanning angular speed and base material angular velocity of rotation
Value, can reduce the heat input of unit time unit area, to reduce molten bath volume.
Further, by control pool size, surface temperature of molten pool and base material metal angular velocity of rotation to control metal
Powder diameter distribution.
The partial size for being centrifuged powder processed is realized by the coupling regulation of surface temperature of molten pool, base material angular velocity of rotation and pool size
Regulation；Capillary force can be reduced by increasing pool size, and improving surface temperature of molten pool can reduce surface tension, improve base material
Angular velocity of rotation can increase the active force of broken melt, and three, which couples regulation, can reduce powder diameter；Conversely, reducing molten bath
Size can be improved capillary force, and surface tension can be increased by reducing surface temperature of molten pool, and reducing base material angular velocity of rotation can be with
Reduce the active force of broken melt, three, which couples regulation, can increase powder diameter.
Further, the centrifugation milling method is to be operated under vacuum conditions.
The present invention has the advantage that and the utility model has the advantages that
The present invention uses electron beam to melt base material metal as heat source, with beam power, the angle of electron beam rotary scanning
The technological parameter of speed and base material angular velocity of rotation as regulation pool size.Then utilize high-speed rotating centrifugal force by melt
It is broken into droplet and is then frozen into powder, using surface temperature of molten pool, base material angular velocity of rotation and pool size as regulation
The technological parameter of powder diameter.
1, the present invention is different from the heat source that conventional centrifugal powder uses, and the present invention is using electron beam as heat source, to metal mother
The geomery of material requires lower, it is only necessary to meet central symmetry；
2, conventional centrifugal flouring technology, melt sizes are larger, and melt sizes poor controllability is unfavorable for the control of powder diameter
System；Heat source size of the invention is controllable, and the control of pool size further may be implemented, so as to realize powder diameter
Accuracy controlling；
3, it is more difficult by conventional centrifugal flouring technology to prepare refractory metal by the present invention, electron beam provided by the invention from
Heart milling method is not limited by base material metal fusing point, and can be used for the centrifugation powder of the metal material of a variety of different melting points；
4, the present invention is narrower by the electron beam centrifugation available particle diameter distribution of powder processed, surface quality is more preferable, impurity content
Lower high quality spherical powder.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is atomizing principles structural schematic diagram of the invention.
Label and corresponding parts title in attached drawing: 1- base material metal, 2- electron beam, the molten bath 3-, 4- metal powder.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation for explaining only the invention, are not made
For limitation of the invention.
Embodiment 1
The metal material centrifugation milling method based on electron-beam melting is present embodiments provided, as shown in Figure 1, concrete operations
It is as follows:
Using electron beam 2 as heat source, is irradiated using electron beam 2 and transmit heat to 1 surface of base material metal and in base material metal
Molten bath 3 is formed on 1；Melt is broken into droplet using the centrifugal force that base material metal 1 rotates simultaneously and is then frozen into metal
Powder 4.By regulation heat input controling parameter to control 3 size of molten bath, the heat input controling parameter includes electron beam 2
Power, 2 rotary scanning angular speed of electron beam and 1 angular velocity of rotation of base material metal；By controlling 3 size of molten bath, 3 surface temperature of molten bath
Degree and 1 angular velocity of rotation of base material metal are to control 4 particle diameter distribution of metal powder；
The irradiation scanning track of the electron beam 2 is circle, and electron beam 2 is rotated with a fixed angular speed along base material metal 1
Direction radial spoke is according to scanning；When the angular speed of 2 rotary scanning of electron beam is greater than 1 angular velocity of rotation of base material metal, electron beam 2 is opposite
1 direction of rotation of base material metal generates positive displacement；When the angular speed of 2 rotary scanning of electron beam is less than 1 rotation angle of base material metal
Speed, 2 opposing metallic base material of electron beam, 1 direction of rotation generate reversed displacement.
Embodiment 2
The metal material centrifugation milling method based on electron-beam melting is present embodiments provided, concrete operations are as follows:
CMSX-4 alloy is chosen as base material metal, fusing point is 1400 DEG C, and base material outer diameter size is 20cm, with electron beam
As heat source, lectron beam spot diameter 0.5mm, beam power 1000W；Using electron beam irradiation to base material metal surface
Transmission heat simultaneously forms molten bath on base material metal；Melt is broken into small liquid using the centrifugal force of base material metal rotation simultaneously
It drips and is then frozen into powder.The irradiation scanning track of electron beam is circle, and electron beam is revolved with a fixed angular speed along base material metal
Turn direction radial spoke according to scanning.
When fusion zone is close to outside, electron beam rotary scanning angular speed: w1=404rad/s
When fusion zone is close to outside, base material metal angular velocity of rotation: w2=400rad/s
Pool size: 1mm
The vacuum degree of vacuum environment: P=10Pa
The final particle diameter distribution for obtaining metal powder is 50-130 μm, average grain diameter is 80 μm, alloy powder oxygen content is
20ppm。
Embodiment 3
The metal material centrifugation milling method based on electron-beam melting is present embodiments provided, concrete operations are as follows:
CMSX-4 alloy is chosen as base material metal, fusing point is about 1400 DEG C, and base material diameter is 20cm, with electronics
Shu Zuowei heat source, lectron beam spot diameter 0.5mm, beam power 1500W；Using electron beam irradiation to base material metal table
Face transmission heat simultaneously forms molten bath on base material metal；Melt is broken into using the centrifugal force of base material metal rotation simultaneously small
Drop is simultaneously then frozen into powder.The irradiation scanning track of electron beam is circle, and electron beam is with a fixed angular speed along base material metal
Direction of rotation radial spoke is according to scanning.
When fusion zone is close to outside, electron beam rotary scanning angular speed: w1=608rad/s
When fusion zone is close to outside, base material metal angular velocity of rotation: w2=600rad/s
Pool size: 0.8mm
The vacuum degree of vacuum environment: P=10Pa
The final particle diameter distribution for obtaining metal powder is 15-70 μm, average grain diameter is 35 μm, alloy powder oxygen content is
25ppm。
Embodiment 4
The metal material centrifugation milling method based on electron-beam melting is present embodiments provided, concrete operations are as follows:
7075 alloys are chosen as base material metal, fusing point is about 650 DEG C, and base material diameter is 30cm, with electron beam
As heat source, lectron beam spot diameter 0.5mm, beam power 1300W；Using electron beam irradiation to base material metal surface
Transmission heat simultaneously forms molten bath on base material metal；Melt is broken into small liquid using the centrifugal force of base material metal rotation simultaneously
It drips and is then frozen into powder.The irradiation scanning track of electron beam is circle, and electron beam is revolved with a fixed angular speed along base material metal
Turn direction radial spoke according to scanning, the centrifugation milling method is to be operated under vacuum conditions.
When fusion zone is close to outside, electron beam rotary scanning angular speed: w1=506rad/s
When fusion zone is close to outside, base material metal angular velocity of rotation: w2=500rad/s
Pool size: 1.5mm
The vacuum degree of vacuum environment: P=10Pa
The final particle diameter distribution for obtaining metal powder is 10-75 μm, average grain diameter is 30 μm, alloy powder oxygen content is
230ppm。
Embodiment 5
The metal material centrifugation milling method based on electron-beam melting is present embodiments provided, concrete operations are as follows:
7075 alloys are chosen as base material metal, fusing point is about 650 DEG C, and base material diameter is 30cm, with electron beam
As heat source, lectron beam spot diameter 1mm, beam power 2000W；It is passed using electron beam irradiation to base material metal surface
Defeated heat simultaneously forms molten bath on base material metal；Melt is broken into droplet using the centrifugal force of base material metal rotation simultaneously
And then it is frozen into powder.The irradiation scanning track of electron beam is circle, and electron beam is rotated with a fixed angular speed along base material metal
Direction radial spoke is according to scanning.
When fusion zone is close to outside, electron beam rotary scanning angular speed: w1=305rad/s
When fusion zone is close to outside, base material metal angular velocity of rotation: w2=300rad/s
Pool size: 2.5mm
The vacuum degree of vacuum environment: P=10Pa
The final particle diameter distribution for obtaining metal powder is 40-150 μm, average grain diameter is 85 μm, alloy powder oxygen content is
180ppm。
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (6)
1. the metal material based on electron-beam melting is centrifuged milling method, which is characterized in that using electron beam as heat source, utilize electricity
Beamlet, which is irradiated, to be transmitted heat to base material metal surface and forms molten bath on base material metal；Base material metal rotation is utilized simultaneously
Melt is broken into droplet and is then frozen into powder by centrifugal force.
2. the metal material according to claim 1 based on electron-beam melting is centrifuged milling method, which is characterized in that described
The irradiation scanning track of electron beam is circle, and electron beam is shone along base material metal direction of rotation radial spoke with a fixed angular speed and swept
It retouches；When the angular speed of electron beam rotary scanning is greater than base material metal angular velocity of rotation, electron beam opposing metallic base material direction of rotation
Generate positive displacement；When the angular speed of electron beam rotary scanning is less than base material metal angular velocity of rotation, electron beam opposing metallic
Base material direction of rotation generates reversed displacement.
3. the metal material according to claim 1 based on electron-beam melting is centrifuged milling method, which is characterized in that pass through
Regulate and control heat input controling parameter to control pool size size.
4. the metal material according to claim 3 based on electron-beam melting is centrifuged milling method, which is characterized in that described
Heat input controling parameter includes beam power, electron beam rotary scanning angular speed and base material metal angular velocity of rotation.
5. the metal material according to claim 3 based on electron-beam melting is centrifuged milling method, which is characterized in that pass through
Pool size, surface temperature of molten pool and base material metal angular velocity of rotation are controlled to control metal powder particle diameter distribution.
6. the metal material according to claim 1 based on electron-beam melting is centrifuged milling method, which is characterized in that described
Being centrifuged milling method is to be operated under vacuum conditions.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811333952.XA CN109202095A (en) | 2018-11-09 | 2018-11-09 | Metal material based on electron-beam melting is centrifuged milling method |
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| CN201811333952.XA CN109202095A (en) | 2018-11-09 | 2018-11-09 | Metal material based on electron-beam melting is centrifuged milling method |
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Citations (6)
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| US4295808A (en) * | 1975-06-28 | 1981-10-20 | Leybold-Heraeus Gmbh & Co. Kg | Apparatus for the production of high-purity metal powder by means of electron beam heating |
| JPS6442506A (en) * | 1987-08-07 | 1989-02-14 | Nippon Kokan Kk | Apparatus for producing powder of metal |
| CN101758238A (en) * | 2010-01-19 | 2010-06-30 | 张建利 | Methods for preparing titanium alloy TC4 prill by plasma auxiliary rotation electrode |
| CN104588675A (en) * | 2015-02-16 | 2015-05-06 | 西安赛隆金属材料有限责任公司 | Device and method for preparing spherical rare metal powder |
| CN107755708A (en) * | 2017-09-28 | 2018-03-06 | 许秦甫 | The preparation method of submicron metal |
| CN108015285A (en) * | 2017-12-21 | 2018-05-11 | 西安欧中材料科技有限公司 | A kind of quick molding method of the high temperature alloy diskware of aero-engine |
-
2018
- 2018-11-09 CN CN201811333952.XA patent/CN109202095A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4295808A (en) * | 1975-06-28 | 1981-10-20 | Leybold-Heraeus Gmbh & Co. Kg | Apparatus for the production of high-purity metal powder by means of electron beam heating |
| JPS6442506A (en) * | 1987-08-07 | 1989-02-14 | Nippon Kokan Kk | Apparatus for producing powder of metal |
| CN101758238A (en) * | 2010-01-19 | 2010-06-30 | 张建利 | Methods for preparing titanium alloy TC4 prill by plasma auxiliary rotation electrode |
| CN104588675A (en) * | 2015-02-16 | 2015-05-06 | 西安赛隆金属材料有限责任公司 | Device and method for preparing spherical rare metal powder |
| CN107755708A (en) * | 2017-09-28 | 2018-03-06 | 许秦甫 | The preparation method of submicron metal |
| CN108015285A (en) * | 2017-12-21 | 2018-05-11 | 西安欧中材料科技有限公司 | A kind of quick molding method of the high temperature alloy diskware of aero-engine |
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Application publication date: 20190115 |