CN111531180B - Metallic beryllium powder for 3D printing and preparation method and application thereof - Google Patents
Metallic beryllium powder for 3D printing and preparation method and application thereof Download PDFInfo
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- CN111531180B CN111531180B CN202010438171.8A CN202010438171A CN111531180B CN 111531180 B CN111531180 B CN 111531180B CN 202010438171 A CN202010438171 A CN 202010438171A CN 111531180 B CN111531180 B CN 111531180B
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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
- B22F9/14—Making metallic powder or suspensions thereof using physical processes using electric discharge
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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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/06—Metallic powder characterised by the shape of the particles
- B22F1/065—Spherical particles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y70/00—Materials specially adapted for additive manufacturing
Abstract
The invention provides metal beryllium powder for 3D printing with high production efficiency, and a preparation method and application thereof. The preparation method can comprise the following steps: placing a metal beryllium bar in a vacuum environment; introducing inert gas into a vacuum environment, wherein the oxygen content in the vacuum environment is not more than 3 ppm; melting the end face of the metal beryllium rod to obtain a liquid film through electric arc; rotating the metallic beryllium rod to break the liquid film into fine particles; and cooling to obtain the metal beryllium powder. The metal beryllium powder can comprise the metal beryllium powder prepared by the preparation method. The application may comprise an application in the field of laser or electron beam additive manufacturing. The beneficial effects of the invention can include: the preparation efficiency of the metal beryllium powder is high, and the energy consumption is low; the prepared metal beryllium powder has good sphericity, low oxygen content and good fluidity and is a good raw material for 3D printing; the equipment used in the process of preparing the spherical metal beryllium powder is more stable and reliable, and the production efficiency is higher than that of other spherical powder preparing devices.
Description
Technical Field
The invention relates to the technical field of preparation of metal beryllium powder, in particular to metal beryllium powder suitable for 3D printing and a preparation method and application thereof.
Background
Additive Manufacturing (AM) is also called 3D printing, and metal powder for 3D printing is the most important ring in the 3D printing industry chain of metal parts, and is also the most valuable. The metal powder for 3D printing needs to have accurate chemical composition and low oxygen content, and must also satisfy the physical properties required for the metal powder by 3D printing technology: fine powder grain diameter, narrow grain diameter distribution interval, high powder grain sphericity, good fluidity, large apparent density, high tap density, few impurities and other special requirements. The powder granularity generally required by the domestic laser cladding deposition technology is as follows: 53-250 μm, the requirements of foreign high-speed laser cladding deposition technology, electron beam selective melting technology and laser selective melting technology on powder are as follows: 15-53 μm; 53 to 150 μm. Generally, the oxygen and nitrogen contents of the product in the powder preparation process are required to be increased compared with those of a raw material rod: 150ppm or less, nitrogen increment: less than or equal to 30 ppm.
The metal beryllium has many excellent characteristics of high elastic modulus, high toughness, easy processing, light weight, high specific stiffness, high specific strength, good thermal stability, high toughness, corrosion resistance and the like, has wide application prospect in the fields of computer manufacturing industry, automobile industry, high-precision high-speed electric welding machine manufacturing industry and the like, and can still keep the original size when being used as a beryllium part with high thermal conductivity changed by hundreds of degrees because the metal beryllium has very strong thermal neutron scattering capacity, so that the beryllium becomes a special functional material and a structural material, has important application in the fields of weapon systems, aerospace, nuclear industry and the like, and becomes a novel material which is concerned at home and abroad. The existing metal beryllium powder in the market is mainly produced by methods such as mechanical crushing, gas atomization and reduction, is irregular polygonal and sponge-shaped, has unreasonable particle size distribution, poor fluidity and low apparent density, cannot meet the requirement of 3D printing, limits the application of the metal beryllium in the field of 3D printing, and urgently needs to develop the metal beryllium powder suitable for 3D printing.
Disclosure of Invention
In view of the deficiencies in the prior art, it is an object of the present invention to address one or more of the problems in the prior art as set forth above. For example, one of the purposes of the present invention is to provide a method for preparing metal beryllium powder for 3D printing, so as to prepare spherical or spheroidal metal beryllium powder.
In order to achieve the purpose, the invention provides a preparation method of metal beryllium powder for 3D printing.
The preparation method can comprise the following steps: placing a metal beryllium bar in a vacuum environment; introducing inert gas into the vacuum environment to replace air, wherein the oxygen content in the vacuum environment after replacement is below 3 ppm; melting the end face of the metal beryllium rod to obtain a liquid film through electric arc; breaking the liquid film into fine particles by centrifugal force; and cooling to obtain the metal beryllium powder.
In an exemplary embodiment of the invention, "placing a metallic beryllium rod in a vacuum environment" and "passing an inert gas into a vacuum environment" may be performed in a non-sequential order.
In an exemplary embodiment of the present invention, the breaking the liquid film into fine particles by the centrifugal force may include: and rotating the metal beryllium rod to break the liquid film into fine particles.
According to an exemplary embodiment of the invention, the beryllium content of the metal beryllium rod can be more than or equal to 98%, the relative density can be more than or equal to 97%, the diameter can be 60-100 mm, and the length can be 350-700 mm.
According to an exemplary embodiment of the invention, in the initial stage of the melting of the end face of the metallic beryllium rod out of the liquid film by the arc, the vacuum degree of the vacuum environment is 5 × 10-3Pa or less, e.g. 4X 10-3Pa、3×10-3Pa, and the like.
According to an exemplary embodiment of the invention, the flow rate of the introduced inert gas may be 80 to 900L/min, the pressure of the inert gas may be 0.4 to 0.6MPa, the inert gas may include a mixed gas composed of argon and helium, and the volume ratio of helium in the mixed gas may be 10 to 90%.
According to an exemplary embodiment of the present invention, the arc length may be 35 to 80mm, and the arc column diameter may be 30 to 40 mm.
According to an exemplary embodiment of the invention, the arc may be output by an arc melting system, and the operating current output of the arc melting system may be 200-4000A.
According to an exemplary embodiment of the invention, the rotating speed of the metal beryllium rod can be 12000-26000 rpm.
According to an exemplary embodiment of the present invention, the step of placing the metallic beryllium rod in a vacuum environment may include: and putting the metal beryllium bar into a plasma arc melting and rotating atomization device, extracting vacuum and controlling the vacuum degree in the device to be less than 5 multiplied by 10 < -3 > Pa.
According to an exemplary embodiment of the invention, the method further comprises the step of: and screening the cooled metal beryllium powder by using an ultrasonic vibration screen under a protective atmosphere, and grading according to the granularity to obtain the metal beryllium powder with different grades.
The invention provides beryllium metal powder for 3D printing. The metal beryllium powder can comprise the metal beryllium powder prepared by the preparation method.
In a further aspect, the invention provides an application of the beryllium metal powder for 3D printing, and the application may include an application in the field of laser or electron beam additive manufacturing, and/or an application in the field of laser or electron beam cladding, for example, an application in electron beam 3D printing.
Compared with the prior art, the beneficial effects of the invention can include: the preparation method of the metal beryllium powder has high production efficiency and low energy consumption; the prepared metal beryllium powder has good sphericity, low oxygen content and good fluidity and is a good raw material for 3D printing; the equipment used in the process of preparing the spherical metal beryllium powder is more stable and reliable, and the production efficiency is higher than that of other spherical powder preparing devices.
Drawings
The above and other objects and features of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings, in which:
FIG. 1 shows a schematic appearance diagram of metallic beryllium powder with a particle size of 53-150 μm;
FIG. 2 shows a schematic particle size distribution of metallic beryllium powder;
FIG. 3 shows a schematic appearance diagram of metallic beryllium powder with the particle size of 15-53 μm.
Detailed Description
Hereinafter, the metallic beryllium powder for 3D printing according to the present invention, the preparation method thereof, and the application thereof will be described in detail with reference to the accompanying drawings and exemplary embodiments.
The invention provides a preparation method of metal beryllium powder for 3D printing.
The consumable electrode can be prepared from metal beryllium, under the protection of inert gas, the metal beryllium powder with chemical components and powder physical properties meeting the 3D printing requirements is prepared by melting through a plasma transfer arc and rotating, centrifuging and atomizing the electrode.
In an exemplary embodiment of the present invention, a method for preparing metallic beryllium powder for 3D printing may include the steps of:
putting a metallic beryllium rod into a plasma arc for melting, rotating and atomizingIn the apparatus, vacuum was drawn and the degree of vacuum in the apparatus (i.e., the degree of vacuum in the vacuum chamber) was controlled to 5X 10-3Pa or less, and further, may be 3X 10-3Pa～5×10-3Pa. Too high vacuum degree in the extraction device prolongs the production preparation time of equipment and reduces the working efficiency, and too low vacuum degree in the extraction device needs to be filled with more inert gas to replace and remove oxygen, which is not economical.
Then introducing mixed inert gas into the device to ensure that the oxygen content in the atomizing cavity (namely the vacuum cavity) is below 3ppm, and starting a plasma arc under the protection of the inert gas to melt the front end of the metallic beryllium rod to form a liquid film. The oxygen content in the atomization chamber influences the oxygen content of the product, so that the oxygen content in the atomization chamber needs to be controlled to be less than or equal to 3ppm, such as 2 +/-0.5 ppm.
And controlling the rotating speed of the metal beryllium rod and feeding simultaneously, starting an electric arc when the distance between the metal beryllium rod and the plasma gun reaches 35-80 mm, and crushing a liquid film melted at the front end of the beryllium raw material rod into fine particles under the action of centrifugal force.
The cooling speed of the beryllium liquid crushed into fine particles is controlled by adjusting the volume proportion of each gas in the mixed inert gas, and the beryllium powder is spheroidized under the action of surface tension to obtain the spherical beryllium powder for 3D printing.
In this embodiment, the diameter of the raw material metal beryllium rod may be 80 ± 20mm, such as 74 mm, 90mm, etc., and the length may be 350 to 700mm, such as 500 ± 50 mm.
The beryllium content of the metal beryllium rod can be more than 98.2 percent (mass fraction), and the relative density can be more than 97 percent.
In this embodiment, before placing the metallic beryllium rod in the plasma arc melting rotary atomizing device, the method may further include the steps of: and (3) processing the metal beryllium bar according to the requirement of a rotary atomizing device.
In this embodiment, the flow rate of the inert gas introduced into the apparatus may be 80 to 900L/min, such as 500 + -200L/min, and the pressure thereof may be 0.4 to 0.6MPa, such as 0.5 + -0.05 MPa.
The introduced inert gas can be a mixed gas of high-purity argon and helium, wherein the volume of the helium accounts for 10-90%, for example, the volume of the helium can be 50% +/-20%. The most available inert gases in the market are nitrogen, argon and helium, other inert gases are relatively difficult to obtain, nitrogen is not suitable for the processing material of the invention, and the gas mixture consisting of argon and helium with large hot melting difference is selected and can be used for adjusting the cooling speed in the process.
The total flow of argon and helium is 80-900L/min, such as 200, 500, 700L/min and the like, and the pressure is 0.4-0.6 MPa, such as 0.5, 0.55MPa and the like.
Preferably, the purity of helium and argon can be more than 99.995%; more preferably, the purity of helium and argon can be more than 99.999%.
In this embodiment, the rotating speed of the metallic beryllium rod may be 12000-26000 rpm, for example 15000, 20000, 25000rpm, and the like.
In the embodiment, the flying liquid film can be melted by continuously feeding the bar stock, and the feeding speed (also called as the feeding speed) can be continuously adjusted within the range of 0-200 mm/min, so that the metallic beryllium powder with different particle size requirements for 3D printing can be continuously obtained, for example, 50 mm/min, 110 mm/min and 170 mm/min.
In this embodiment, at the beginning of the preparation, a 350-700 mm long metallic beryllium rod can be completely placed in the vacuum chamber of the device, the metallic beryllium rod is fed while rotating, and when the distance reaches the requirement of 35-80 mm of the arc length, the arc is opened.
One end of the metal beryllium rod can be connected with a feeding system, and the other end of the metal beryllium rod can be connected with the anode of the plasma gun through an electric arc.
By adopting the preparation method of the metal beryllium powder, the metal beryllium powder which can meet the 3D printing requirement can be prepared in batch. The yield of the prepared metal beryllium powder with the granularity of 15-250 mu m can be more than 83 percent, and the yield of the metal beryllium powder with the granularity of 53-150 mu m can be more than 75 percent, such as 76 percent, 80 percent and the like. The sphericity of the powder particle morphology to the standard circle may be above 90%, further above 92%, for example 93%.
Comparing the oxygen content of the powder product with the oxygen content of the raw material rod, and increasing the oxygen content in the powder preparation process: 150ppm or less, nitrogen increment: less than or equal to 30 ppm.
In this embodiment, the present invention can be used to prepare metal powder (i.e., beryllium metal powder) by arc melting a rotary atomizer, such as a plasma arc melting rotary centrifugal atomizer.
In the process of metal powder, due to different properties and melting points of metals, the viscosity of the metal liquid is also different, and the thickness of a liquid film layer on the melting end face of the beryllium raw material rod is determined by the energy density of the melting arc, so that the smooth proceeding of the powder granularity and the atomization process is influenced. The energy density of the electric arc is too low, so that the time for finishing the melting of the raw material rod is prolonged, a large amount of heat is transferred to a motor shaft and a bearing, and the motor cannot work normally. The energy density of the electric arc is too high, and the liquid film layer on the melting end face of the beryllium raw material rod is too thick, so that the powder is thickened, the flash is easy to generate, the vibration of the raw material rod is increased, and the atomization process cannot be carried out. The operating current determines the magnitude of the arc energy density.
The rotation speed, the working current, the arc distance and the feeding speed of the beryllium rod are important process parameters, and the atomization process can be smoothly realized only through the combination and cooperation of the process parameters.
In the present embodiment, the arc melting rotary atomizing device (may be simply referred to as an atomizing system) mainly includes:
(1) an arc melting system: the working current is output by 200-4000A, the arc length is 35-80 mm, and the diameter of the arc column is 30-40 mm. An arc melting system may melt a metallic beryllium feedstock bar into droplets.
(2) Rotating centrifugal atomization system (rotating system for short): the metal beryllium raw material rod is placed into a rotary centrifugal atomization system, and the rotary system can control the rotating speed of the metal beryllium rod to be 12000-26000 rpm. The rotating system can enable the metal beryllium rod to generate centrifugal force after being melted, and a liquid film at the front end of the metal beryllium rod is atomized into liquid drops and cooled into powder under the action of the centrifugal force.
(3) A feeding system: the feed system may be attached to one end of a metallic beryllium bar. The feeding system can supplement the melted and separated liquid film by continuously feeding the bar stock (namely the metal beryllium bar), and the feeding speed can be continuously adjusted within 0-200 mm/min.
In order that the above-described exemplary embodiments of the invention may be better understood, further description thereof with reference to specific examples is provided below.
Example 1
A metallic beryllium rod (the main components are shown in Table 1) containing 98.2 percent of beryllium and 97 percent of relative density is processed into a raw material beryllium rod with the diameter of 50 multiplied by 700mm, and the surface oxide and the impurities of the raw material beryllium rod are removed.
Putting the raw material beryllium rod with the surface oxides and impurities removed into an arc rotating electrode device, and vacuumizing to 3 x 10-3Pa。
And then introducing mixed inert gas into the device, starting the electric arc under the protection of the inert gas when the oxygen content in the atomizing cavity is ensured to be lower than 3ppm, and controlling the melting power of the electric arc by adjusting the working current to further control the melting speed of the metal beryllium rod, wherein the working current is 1800A, and the length of the electric arc is 70 mm.
Rotating the raw material beryllium rod at 16000rpm, melting the front end of the raw material beryllium rod by electric arc to obtain a liquid film, crushing the liquid film into fine metallic beryllium liquid drops by the centrifugal force of the raw material beryllium rod after rotating at high speed, and cooling and solidifying in a mixed inert gas environment. Wherein the feeding speed of the metallic beryllium rod is 108 mm/min. The volume of argon with the purity of 99.995 percent accounts for 20 percent and the volume of helium with the purity of 99.995 percent accounts for 80 percent in the mixed inert gas; the flow rate of the mixed inert gas was 500L/min, and the pressure thereof was 0.6 MPa.
And taking out the prepared metal beryllium powder after cooling to room temperature, sieving by using an ultrasonic vibration sieve under the protection of argon, grading according to the granularity to obtain spherical metal beryllium powder with different grades, and performing vacuum packaging by using a plastic film to obtain the product.
TABLE 1 content (wt%) of main element of metallic beryllium bar in example 1
The particle morphology of the prepared metal beryllium powder product for 3D printing is spherical or sphere-like, for example, the schematic diagram of the morphology of the metal beryllium powder with the particle size of 53-150 μm shown in FIG. 1 is shown. FIG. 2 shows the particle size distribution of metallic beryllium powder, from which it can be seen that the concentration is mainly 50 to 150 μm.
The content of the main chemical elements of the metallic beryllium powder product is shown in table 2, and is basically equivalent to the composition of a raw material rod before powder preparation, aluminum and impurity metal elements are reduced, and magnesium is gasified at a high temperature of ten thousand degrees. The obtained metal beryllium powder has the advantages that the oxygen content of particles in the range of 45-250 micrometers is 0.073%, the oxygen increment is less than 140ppm, the nitrogen increment is less than 18ppm, the sphericity is 92%, and the flowability is 88s/50g (the flowability is tested by using a Hall flow meter) in the range of 53-150 micrometers.
Table 2 main chemical composition (wt%) of metallic beryllium powder in example 1
Example 2
A metallic beryllium rod (shown in Table 3) containing more than 99.1 percent of beryllium and having a relative density of more than 97 percent is taken and processed into a raw material beryllium rod with the diameter of phi 100 multiplied by 350mm, and oxides and impurities on the surface of the raw material beryllium rod are removed.
Putting the raw material beryllium rod with the surface oxides and impurities removed into an arc rotating electrode device, and vacuumizing to 3 x 10-3Pa。
And then introducing mixed inert gas into the device to ensure that the oxygen content in the atomizing cavity is lower than 3ppm, starting the electric arc under the protection of the inert gas, controlling the melting speed of the metal beryllium rod by controlling the melting power and the working current, and outputting the working current of 2800A and the electric arc length of 45 mm.
Rotating a raw material beryllium rod at the rotation speed of 26000rpm, melting the end face of the raw material beryllium rod into a liquid film by electric arc, crushing the liquid film into fine metal beryllium liquid drops by a rotating centrifugal force, cooling and solidifying the liquid drops in a mixed inert gas environment, and simultaneously continuously feeding a rod material, wherein the feeding speed of the metal beryllium rod is 48mm/min, and the liquid film thrown out by the continuously supplemented centrifugal force is continuously fed, so that metal beryllium powder is prepared. The volume ratio of argon with the purity of 99.999 percent in the mixed inert gas is 90 percent, and helium with the purity of 99.999 percent is 10 percent. The flow rate of the mixed inert gas is 120L/min, and the pressure is 0.4 MPa.
And taking out after cooling to room temperature, sieving by using an ultrasonic vibration sieve under the protection of argon, grading according to the granularity to obtain spherical metal beryllium powder with different grades, and performing vacuum packaging by using a plastic film to obtain the product.
TABLE 3 content (wt%) of main element of metallic beryllium bar in example 2
Table 4 shows the chemical compositions of the metallic beryllium powder prepared in this example, and it can be seen by comparison that the main chemical element content of the prepared metallic beryllium powder product for 3D printing is equivalent to the raw material rod composition before milling.
Table 4 main chemical composition (wt%) of metallic beryllium powder in example 2
FIG. 3 shows a shape schematic diagram of metal beryllium powder with the particle size of 15-53 μm, wherein the particle shape of the metal beryllium powder is spherical or quasi-spherical, and the sphericity is 90%. The oxygen content of particles of the metal beryllium powder in the range of 15-53 mu m is 0.078%, and the increment of the oxygen content is less than 140 ppm; the fluidity is 92s/50g within the range of 15-53 μm.
The invention provides beryllium metal powder for 3D printing. The metal beryllium powder can comprise the metal beryllium powder prepared by the preparation method.
The invention further provides application of the beryllium metal powder for 3D printing, which can be applied to the field of laser or electron beam 3D printing, such as the field of high-speed laser cladding deposition, the field of electron beam selective melting and the like.
In summary, the metallic beryllium powder for 3D printing, the preparation method thereof, and the application thereof according to the present invention have the following advantages:
(1) the preparation method has high production efficiency and low cost.
(2) The invention combines an electric arc melting system and a rotary centrifugal atomization system, and the produced metal beryllium powder has the following characteristics: fine powder grain diameter, narrow grain diameter distribution interval, high powder grain sphericity, good fluidity, large apparent density, high tap density and less impurities.
(3) Under the condition that beryllium is toxic, the device has a good sealing effect, and the risk of leakage of beryllium pollutants is reduced by adopting a mode of vacuum and inert gas protection in the atomizing cavity.
(4) The metal beryllium powder prepared by the invention can be used for developing a large number of complex beryllium parts by an additive manufacturing technology, and can meet the requirements of aerospace, aviation, national defense and military industry.
Although the present invention has been described above in connection with exemplary embodiments, it will be apparent to those skilled in the art that various modifications and changes may be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (6)
1. A preparation method of metal beryllium powder for 3D printing is characterized by comprising the following steps:
placing a metal beryllium bar in a vacuum environment; introducing inert gas into the vacuum environment to replace air, wherein the oxygen content in the vacuum environment after replacement is below 3 ppm;
melting the end face of the metal beryllium rod to obtain a liquid film through electric arc;
breaking the liquid film into fine particles by centrifugal force;
cooling to obtain metal beryllium powder;
the beryllium content of the metal beryllium rod is more than or equal to 98%, the relative density is more than or equal to 97%, the diameter is 60-100 mm, and the length is 350-700 mm;
at the initial stage of melting the end face of the metallic beryllium rod out of a liquid film through the electric arc, the vacuum degree of the vacuum environment is 5 multiplied by 10- 3Pa below;
the inert gas comprises a mixed gas consisting of argon and helium, and the volume ratio of the helium in the mixed gas is 10-90%;
the electric arc is output by an electric arc melting system, the working current output of the electric arc melting system is 200-4000A, the length of the electric arc is 35-80 mm, and the diameter of an arc column is 30-40 mm;
the rotating speed of the metal beryllium rod is 12000-26000 rpm;
the feeding speed of the metal beryllium bar is continuously adjustable within the range of 0-200 mm/min.
2. The preparation method of the metallic beryllium powder for 3D printing according to claim 1, wherein the flow rate of the introduced inert gas is 80-900L/min, and the pressure of the inert gas is 0.4-0.6 MPa.
3. The method for preparing the metallic beryllium powder for 3D printing according to claim 1, wherein the step of placing the metallic beryllium rod in a vacuum environment comprises:
putting the metal beryllium bar into a plasma arc melting and rotating atomization device, extracting vacuum and controlling the vacuum degree in the device to be 5 multiplied by 10-3Pa or less.
4. The method for preparing the metallic beryllium powder for 3D printing according to claim 1, further comprising the steps of:
and screening the cooled metal beryllium powder by using an ultrasonic vibration screen under a protective atmosphere, and grading according to the granularity to obtain the metal beryllium powder with different grades.
5. The metal beryllium powder for 3D printing is characterized by comprising the metal beryllium powder prepared by the preparation method of the metal beryllium powder for 3D printing according to any one of claims 1 to 4.
6. The application of the metallic beryllium powder for 3D printing in claim 5 comprises the following steps: the method is applied to the field of laser or electron beam additive manufacturing and the field of laser or electron beam cladding.
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| CN114769606B (en) * | 2022-06-22 | 2022-10-18 | 中国科学院近代物理研究所 | Method for preparing beryllium-titanium alloy pellets based on plasma rotating electrode |
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