CN114951670A - Preparation method of ultrasonic atomization high-temperature alloy powder for 3D printing - Google Patents
Preparation method of ultrasonic atomization high-temperature alloy powder for 3D printing Download PDFInfo
- Publication number
- CN114951670A CN114951670A CN202210761939.4A CN202210761939A CN114951670A CN 114951670 A CN114951670 A CN 114951670A CN 202210761939 A CN202210761939 A CN 202210761939A CN 114951670 A CN114951670 A CN 114951670A
- Authority
- CN
- China
- Prior art keywords
- powder
- temperature alloy
- printing
- ultrasonic
- ultrasonic atomization
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- 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
- B22F9/082—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 atomising using a fluid
-
- 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
-
- 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
-
- 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
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
-
- 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
- B22F9/082—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 atomising using a fluid
- B22F2009/0848—Melting process before atomisation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention relates to the technical field of metal powder preparation, in particular to a preparation method of ultrasonic atomization high-temperature alloy powder for 3D printing, which comprises the following steps: s1, preparing a high-temperature alloy raw material; s2, preparing before atomization; s3, melting the raw materials; s4, ultrasonic atomization; s5, collecting powder; and S6, screening. The powder particle size distribution of the high-temperature alloy powder prepared by the invention is 10-90 mu m, the D50 is 40-50 mu m, the sphericity is more than 0.91, and the fluidity is less than 18s/50 g; according to the invention, the 3D printing high-temperature alloy is prepared by adopting ultrasonic atomization, the yield of powder in a 15-53 mu m granularity interval can reach more than 65%, the consumption of argon gas in the powder preparation process is low, the production cost of the 3D printing high-temperature alloy can be obviously reduced, and the consumption of scarce resources in China such as nickel, cobalt and the like is saved; effectively promote powder parameters such as sphericity, mobility, hollow powder content of 3D printing superalloy powder, improve the performance of final 3D printing part.
Description
Technical Field
The invention relates to the technical field of metal powder preparation, in particular to a preparation method of ultrasonic atomization high-temperature alloy powder for 3D printing.
Background
The 3D printing technology is a part manufacturing technology which is rapidly developed in recent years, wherein the SLM selective laser melting technology can best embody the technical characteristics of the 3D printing technology and is the most widely applied one of the 3D printing technologies. The metal powder is used as a raw material of the SLM selective laser melting technology, requires granularity intervals of 15-53 mu m, 15-45 mu m and the like, and has the characteristics of narrow granularity distribution range and small powder particle size. The common gas atomization powder preparation technology is used for producing 3D printing high-temperature alloy powder, the yield of powder in a particle size range of 15-53 microns is only about 30%, the yield of powder in the particle size range of 15-53 microns is only about 10% in the 3D printing high-temperature alloy powder produced by a rotary electrode method, and the lower yield is an important reason for the higher cost of the 3D printing powder. In addition, argon is an atomizing medium for producing metal powder by using a gas atomization technology, a large amount of argon is consumed in the production process, the cost of the argon usually accounts for 30% -60% of the cost of the metal powder, the influence of argon price fluctuation on the powder cost is large, and how to reduce the argon consumption in the powder preparation process is the key for reducing the cost of the metal powder.
During the gas atomization powder process, the molten metal liquid drops can collide and deform and adhere under strong gas impact to form special-shaped powder, so that the flowability of 3D printing powder is poor, and the powder spreading in the 3D printing process is influenced. The hollow powder formed by wrapping gas with metal droplets can also cause holes in the 3D printing part, reduce the density of the part and influence the fatigue performance of the part.
3D printing technique is limited to its cost, and the application field is mostly fields such as aviation, space flight, medical treatment, how to reduce the manufacturing cost that 3D printed the powder, and then reduces 3D and prints part cost, and is vital to the future rapid development of 3D printing technique. The sphericity, the fluidity, the hollow powder rate and other key parameters of the metal powder are improved, and the performance and the service life of the 3D printing part are improved very urgently for reducing the generation of defects in the 3D printing process.
Therefore, the invention provides a preparation method of ultrasonic atomization superalloy powder for 3D printing, and aims to solve the technical problems.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a preparation method of ultrasonic atomization high-temperature alloy powder for 3D printing, which adopts an atomization mechanism that ultrasonic crushing metal liquid drops are used as metal powder, so that the yield of the powder in a particle size range of 15-53 mu m is greatly improved, and the sphericity, the fluidity and the hollow powder rate of the powder are improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of ultrasonic atomization high-temperature alloy powder for 3D printing comprises the following specific steps:
s1, preparing a high-temperature alloy raw material;
s2, preparing before atomization, namely putting the high-temperature alloy raw material into ultrasonic atomization powder making equipment by adopting different tools according to different forms; starting a vacuum system, pumping the vacuum degree in a working cavity of the equipment to be lower than 1 x 10 < -2 > Pa, and filling argon as protective atmosphere;
s3, melting the raw materials, melting the high-temperature alloy raw materials in an electromagnetic induction heating or plasma arc mode, and dropping the molten metal liquid onto the ultrasonic atomization substrate;
s4, ultrasonic atomization, namely, transmitting ultrasonic waves with certain frequency to an atomization substrate by an ultrasonic generator through a conduction device, and further atomizing high-temperature alloy liquid drops dropping on the ultrasonic atomization substrate into high-temperature alloy powder;
s5, collecting powder, collecting atomized high-temperature alloy powder into a cyclone collector from a working cavity along with gas by using a vacuum pump, separating powder with a target particle size from atomized waste by using the cyclone collector, and discharging the atomized waste and the gas from equipment through a filter;
s6, screening, namely placing the high-temperature alloy powder prepared by the ultrasonic atomization equipment into an explosion-proof vibrating screen, selecting screens with different apertures according to the granularity interval of the target powder, and screening the powder into the target granularity.
Preferably, in step S1, the superalloy material is a rod material, a block material or a wire material, the rod material has a diameter of 50mm and a length of 500 mm; the diameter of the wire is 6 mm.
Preferably, in step S4, the ultrasonic frequency is 20Khz and the ultrasonic generator power is 3000 w.
Preferably, in step S3, the ultrasonic atomization substrate is cooled by a circulating cooling water system, and the temperature of the ultrasonic atomization substrate is 300-500 ℃.
Adopt above-mentioned technical scheme: the particle size distribution of the prepared high-temperature alloy powder is 10-90 mu m, the D50 is 40-50 mu m, the sphericity is more than 0.91, and the fluidity is less than 18s/50 g; the particle size of the high-temperature alloy powder can be adjusted by adjusting the ultrasonic frequency and the power of an ultrasonic generator, and the powder D50 is controlled to be 40-50 mu m, so that the yield of the powder particle size section required by the SLM selective laser melting 3D printing process is greatly improved.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the 3D printing high-temperature alloy is prepared by adopting ultrasonic atomization, the yield of powder in a 15-53 mu m granularity interval can reach more than 65%, the consumption of argon gas in the powder preparation process is low, the production cost of the 3D printing high-temperature alloy can be obviously reduced, and the consumption of scarce resources in China such as nickel, cobalt and the like is saved; effectively promote powder parameters such as sphericity, mobility, hollow powder content of 3D printing superalloy powder, improve the performance of final 3D printing part.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, so that those skilled in the art can better understand the advantages and features of the present invention, and thus the scope of the present invention is more clearly defined. The embodiments described herein are only a few embodiments of the present invention, rather than all embodiments, and all other embodiments that can be derived by one of ordinary skill in the art without inventive faculty based on the embodiments described herein are intended to fall within the scope of the present invention.
Referring to fig. 1, a preparation method of ultrasonic atomization superalloy powder for 3D printing includes the following steps:
s1, preparing a high-temperature alloy raw material; the high-temperature alloy raw material can be prepared by adopting the processes of arc melting, vacuum induction melting, vacuum consumable melting, electroslag remelting, vacuum suspension melting and the like according to the alloy components and processing batches. The raw material processed by the ultrasonic atomization equipment can be in the shape of a bar stock with the diameter of 50mm and the length of 500mm, a block with the maximum size not exceeding 200mm, or a wire with the diameter within 6 mm.
S2, preparing before atomization, namely putting the high-temperature alloy raw material into ultrasonic atomization powder making equipment by adopting different tools according to different forms; starting a vacuum system, pumping the vacuum degree in a working cavity of the equipment to be lower than 1 x 10 < -2 > Pa, and filling argon as protective atmosphere;
s3, melting the raw materials, namely heating the bottom of the bar by using an electromagnetic induction coil for the high-temperature alloy raw material of the bar, converging the molten metal at the bottom of the bar and then dripping the molten metal, wherein the superheat degree of the molten metal is about 150 ℃; putting the massive high-temperature alloy raw material into a ceramic crucible for induction heating and melting, and then tilting the crucible to pour out molten metal; for high-temperature alloy of wire materials, a wire feeding device is adopted to realize continuous wire feeding, and the wire materials are melted into metal droplets by adopting a plasma arc;
and S4, ultrasonic atomization, dropping the molten metal liquid onto an ultrasonic atomization substrate, connecting the ultrasonic atomization substrate with an ultrasonic generator through an ultrasonic conduction device, conducting the ultrasonic wave with the frequency of 20Khz generated by the ultrasonic generator to the ultrasonic atomization substrate to enable the substrate to generate high-frequency vibration, crushing the dropped metal liquid into fine metal liquid drops after the substrate is contacted, and performing spontaneous spheroidization on the metal liquid drops under the action of surface tension of protective gas to obtain solid metal powder after cooling. The process can adjust the frequency and power of the ultrasonic generator according to different high-temperature alloys and required powder granularity. In the atomization process, the surface temperature of the ultrasonic atomization substrate needs to be controlled at 300-500 ℃ by adjusting the dropping position of the metal liquid and the flow of cooling water;
s5, collecting powder, collecting atomized high-temperature alloy powder into a cyclone collector from a working cavity along with gas by using a vacuum pump, separating powder with a target particle size from atomized waste by using the cyclone collector, and discharging the atomized waste and the gas from equipment through a filter;
s6, screening, namely placing the high-temperature alloy powder prepared by the ultrasonic atomization equipment into an explosion-proof vibrating screen, selecting screens with different apertures according to the granularity interval of the target powder, and screening the powder into the target granularity.
Example (b):
the invention takes GH3536 high-temperature alloy powder as an example, and the specific preparation method comprises the following steps:
s1, preparing a high-temperature alloy master alloy, preparing a GH3536 cast bar with the diameter of 100mm by adopting a vacuum induction melting process, and then forging the GH3536 cast bar into a forged bar with the diameter of 50mm and the length of 500 mm;
s2, preparing before atomization, namely placing the bar clamping tool module into ultrasonic atomization powder manufacturing equipment, and clamping and fixing the GH3536 bar prepared before. Starting a vacuum system, pumping the vacuum degree in a working cavity of the equipment to be lower than 1 multiplied by 10 < -2 > Pa, filling argon with the purity of 99.99 percent as protective atmosphere, and opening a circulating cooling water system and a cyclone collector;
and S3, melting the raw materials, turning on a power supply of the electromagnetic induction coil, setting the power to be 20KW, and keeping the distance between the bottom of the bar and the coil by the bar advancing mechanism. The bar stock and the induction coil synchronously rotate around the central axis at the rotating speed of 60r/min, and molten metal droplets uniformly drop on the ultrasonic atomization substrate;
and S4, carrying out ultrasonic atomization, setting the frequency of an ultrasonic atomization generator to be 20KHz, setting the power to be 3000W, and crushing, spheroidizing and solidifying the dropped GH3536 metal liquid drops after contacting the ultrasonic atomization substrate to form metal powder. In the process, the flow rate of the cooling water is adjusted to be 10L/s, and the surface temperature of the substrate is controlled to be 300-500 ℃;
and S5, collecting powder, collecting the atomized GH3536 metal powder from the working cavity into a cyclone collector by a vacuum pump, separating the powder with the target granularity from the atomized waste by the cyclone collector, and discharging the atomized waste and gas from equipment through a filter.
S6, screening, namely placing the collected powder in an explosion-proof vibrating screen, and screening by adopting screens of 270 meshes and 800 meshes;
s7, powder inspection, detection, the yield of 15-53 mu m granularity of GH3536 powder in the experiment is 68%, the sphericity is 0.92, the fluidity is 17S/50g, and the void fraction is less than 0.01%.
In conclusion, the 3D printing high-temperature alloy is prepared by adopting ultrasonic atomization, the yield of powder in the grain size range of 15-53 mu m can reach more than 65%, the consumption of argon is low in the powder preparation process, the production cost of the 3D printing high-temperature alloy can be obviously reduced, and the consumption of scarce resources in China, such as nickel, cobalt and the like, is saved; effectively promote powder parameters such as sphericity, mobility, hollow powder content of 3D printing superalloy powder, improve the performance of final 3D printing part.
The description and practice of the disclosure herein will be readily apparent to those skilled in the art from consideration of the specification and understanding, and may be modified and modified without departing from the principles of the disclosure. Therefore, modifications or improvements made without departing from the spirit of the invention should also be considered as the protection scope of the invention.
Claims (4)
1. A preparation method of ultrasonic atomization superalloy powder for 3D printing is characterized by comprising the following specific steps:
s1, preparing a high-temperature alloy raw material;
s2, preparing before atomization, namely putting the high-temperature alloy raw material into ultrasonic atomization powder making equipment by adopting different tools according to different forms; starting a vacuum system, pumping the vacuum degree in a working cavity of the equipment to be lower than 1 x 10 < -2 > Pa, and filling argon as protective atmosphere;
s3, melting the raw materials, melting the high-temperature alloy raw materials in an electromagnetic induction heating or plasma arc mode, and dropping the molten metal onto the ultrasonic atomization substrate;
s4, ultrasonic atomization, namely, transmitting ultrasonic waves with certain frequency to an atomization substrate by an ultrasonic generator through a conduction device, and further atomizing high-temperature alloy liquid drops dropping on the ultrasonic atomization substrate into high-temperature alloy powder;
s5, collecting powder, collecting atomized high-temperature alloy powder into a cyclone collector from a working cavity along with gas by using a vacuum pump, separating powder with a target particle size from atomized waste by using the cyclone collector, and discharging the atomized waste and the gas from equipment through a filter;
s6, screening, namely placing the high-temperature alloy powder prepared by the ultrasonic atomization equipment into an explosion-proof vibrating screen, selecting screens with different apertures according to the granularity interval of the target powder, and screening the powder into the target granularity.
2. The method for preparing the ultrasonic atomized superalloy powder for 3D printing according to claim 1, wherein in step S1, the superalloy material is a bar, a block, or a wire, the bar has a diameter of 50mm and a length of 500 mm; the diameter of the wire is 6 mm.
3. The method of claim 1, wherein in step S4, the ultrasonic frequency is 20Khz and the ultrasonic generator power is 3000 w.
4. The method as claimed in claim 1, wherein in step S3, the substrate is cooled by a circulating cooling water system, and the temperature of the substrate is 300-500 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210761939.4A CN114951670A (en) | 2022-06-29 | 2022-06-29 | Preparation method of ultrasonic atomization high-temperature alloy powder for 3D printing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210761939.4A CN114951670A (en) | 2022-06-29 | 2022-06-29 | Preparation method of ultrasonic atomization high-temperature alloy powder for 3D printing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114951670A true CN114951670A (en) | 2022-08-30 |
Family
ID=82967547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210761939.4A Withdrawn CN114951670A (en) | 2022-06-29 | 2022-06-29 | Preparation method of ultrasonic atomization high-temperature alloy powder for 3D printing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114951670A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117001004A (en) * | 2023-09-28 | 2023-11-07 | 西安赛隆增材技术股份有限公司 | Microwave plasma powder making device and method |
-
2022
- 2022-06-29 CN CN202210761939.4A patent/CN114951670A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117001004A (en) * | 2023-09-28 | 2023-11-07 | 西安赛隆增材技术股份有限公司 | Microwave plasma powder making device and method |
| CN117001004B (en) * | 2023-09-28 | 2023-12-05 | 西安赛隆增材技术股份有限公司 | Microwave plasma powder making device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Sun et al. | Review of the methods for production of spherical Ti and Ti alloy powder | |
| CN105522161B (en) | Rapid large-scale preparation method of fine-particle-size spherical powder for 3D printing | |
| CN108941588B (en) | Preparation method of nickel-based superalloy powder for laser forming | |
| CN108161019B (en) | Powder making method of induction heating and radio frequency plasma combined atomization powder making system | |
| CN106623959A (en) | Preparation method of Waspalloy spherical powder for additive manufacturing | |
| CN110480024B (en) | Method for preparing CuCrZr spherical powder based on VIGA process | |
| CN107309434B (en) | Preparation method and application of high-purity compact spherical molybdenum powder | |
| CN108907210A (en) | A method of increasing material manufacturing is prepared with solid globular metallic powder | |
| CN105252009B (en) | A kind of manufacture method of micro-fine spherical titanium powder | |
| JP2014515792A (en) | Low cost processing method to produce spherical titanium and spherical titanium alloy powder | |
| CN112981177B (en) | Titanium alloy powder capable of being used for selective laser melting 3D printing, selective laser melting titanium alloy and preparation thereof | |
| CN106964782B (en) | Method for preparing spherical niobium alloy powder | |
| MXPA04003959A (en) | Method and apparatus for the production of metal powder. | |
| CN101439403A (en) | Earlier stage treatment process of raw material powder for preparing induction plasma capacitor level nano tantalum powder | |
| CN114951670A (en) | Preparation method of ultrasonic atomization high-temperature alloy powder for 3D printing | |
| CN107999778A (en) | A kind of method for preparing AF1410 spherical powders | |
| CN108421984A (en) | A kind of powder of stainless steel and preparation method thereof for increasing material manufacturing | |
| CN107470642A (en) | A kind of powder preparation method | |
| CN111515408B (en) | NiTi alloy powder and preparation method and application thereof | |
| CN208696304U (en) | A kind of device of low-voltage direct plasma gun preparation 3D printing titanium valve | |
| CN114226738A (en) | Powder preparation method for 3D printing and powder stirring mill | |
| CN114669759B (en) | Outfield auxiliary high-entropy alloy laser additive manufacturing device and method thereof | |
| JPH0625717A (en) | Method and device for producing globular grain by high-frequency plasma | |
| CN115625339A (en) | Device and method for preparing spherical powder by adopting radio frequency plasma | |
| CN114226742A (en) | Preparation method of aluminum alloy powder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20220830 |