Transverse magnetic field assisted efficient arc discharge powder preparation device and method

Abstract

The invention discloses a transverse magnetic field assisted efficient arc discharge powder preparation device and method, and belongs to the technical field of aerospace manufacturing. The device comprises a discharge system, a liquid supply system, a gas supply system, a motion control system and a product filtering and collecting system. The steps of the method are carried out in a closed environment by utilizing a sealed protective cover, and protective gas in a gas tank is input into a sealed area through a gas nozzle to prevent oxidation of prepared metal particles. The magnetic field is used for lengthening the plasma, the melting area is increased, the molten metal fragmentation degree is improved, the fine powder yield can be increased, and the preparation efficiency is improved. Metal particles are accelerated to leave the discharge electrodes through the magnetic field, short circuit is avoided, plasma excursion is accelerated, particles are prevented from being burnt excessively, and the quality of prepared particles is guaranteed. Discharge point transfer is achieved through discharge state monitoring and motion control, a discharge medium is updated through fluid scouring, and preparation continuity is guaranteed. Waste materials can be used for preparation, and the preparation cost is reduced.

Description

Technical Field

[0001] The present invention relates to the field of aerospace manufacturing technology, and in particular to a device and method for preparing high-efficiency arc discharge powder assisted by a transverse magnetic field. Background Art

[0002] The development of the aerospace manufacturing field has put forward requirements for the preparation of parts such as shorter R&D cycles, higher material utilization, stronger customization, and better structural design. Therefore, metal 3D printing technology has developed rapidly in recent years. In addition, technologies such as powder metallurgy have also been widely used, so the demand for powder raw materials has increased sharply. How to efficiently prepare powder raw materials with small and uniform particle size has become an urgent problem to be solved.

[0003] Currently, the atomization method is mostly used for powder preparation, which breaks the liquid metal into tiny powder particles.

[0004] For example, patent CN 113976897 A (Yang Fang, University of Science and Technology Beijing) discloses a method for preparing P-containing high-strength stainless steel powder by a two-stream atomization method, which uses a heating system to melt and keep the ingot warm, and uses a guide crucible to continuously and evenly flow the molten metal out. A high-pressure nozzle is used to generate a high-speed airflow or water flow to flush the high-temperature molten metal, so that the molten metal is atomized to form droplets to obtain metal powder, and finally the powder is dried and sieved.

[0005] For example, patent CN 112719277 A (Jiang Yong, Nantong Jinyuan Intelligent Technology Co., Ltd.) discloses a method and device for preparing high-temperature alloy powder for additive manufacturing, which uses a rotating disk atomization method for preparation. Figure 3 As shown in the figure, the metal is heated to liquid in the melting chamber 1, and the heated metal liquid is sprayed onto the rotating horizontal disc 6 by the nozzle 4, and the molten metal is thrown into powder by the rotation. The rotary atomization ensures the sphericity of the powder, and the whole process is carried out in an argon protection atmosphere, which ensures that the oxygen content of the powder is low. The generation of spark plasma is accompanied by local high temperature, which can melt the conductive material and is also used to prepare metal powder.

[0006] For example, patent CN 104550991 A (Sun Hongliang, Southwest Jiaotong University) discloses a method for preparing ultrafine titanium-aluminum alloy powder. The positive and negative electrodes use the same material, and electric spark discharge is performed in liquid argon. Liquid argon needs to be replenished regularly during the processing. After a period of processing, the precipitate is placed in a vacuum freeze dryer to obtain the required pure titanium-aluminum alloy ultrafine powder.

[0007] In order to solve the problem of spark discharge preparation efficiency, with the rise of arc discharge machining in recent years, the use of arc plasma to prepare powder has also received widespread attention. Different from the previous use of arc as a heat source to heat metal to produce molten metal, arc discharge machining to prepare powder directly uses metal materials as electrodes, discharges directly on the metal materials to melt or vaporize and erode them, and then cools the liquid or gaseous metal into particles by cooling. For example, the method and metal powder for preparing metal powder by cavitation jet assisted arc micro-explosion disclosed in patent CN 113070481 A (Xu Hui, Shenzhen Hangke New Materials Co., Ltd.) utilizes arc plasma generated by arc discharge to melt metal, utilizes the growth and collapse of cavitation bubbles generated by fluid and fluid flowing through a variable cross-section flow channel, causes arc plasma to deviate and break the arc, and produces a small explosion, and utilizes the explosion to refine the molten workpiece material, thereby improving the processing efficiency.

[0008] The existing atomization method is easy to form satellite powder, and the fine powder content is low, which can no longer fully meet the 3D printing process with increasingly high quality requirements. It often needs to be further refined by means of spheroidization, grinding, etc., which prolongs the preparation process and reduces the preparation efficiency. The existing method of preparing powder by spark plasma discharge also faces the problem of efficiency. Due to the small energy of spark discharge and the limited volume of metal removed by one discharge, there is an inherent disadvantage in efficiency. The efficiency of preparing powder by rod-shaped device is about 1g / h, which is difficult to meet the growing demand.

[0009] When using arc plasma discharge to produce powder, although arc plasma has high energy and high efficiency, the internal pressure is high and more difficult to control. As a result, on the one hand, the generated metal particles may accumulate between the electrodes, causing short circuits and burning the produced powders. On the other hand, due to the uneven flushing effect of the fluid on the molten metal, it is easy to cause problems such as poor uniformity of the generated particles and low recovery rate of fine powder.

[0010] The method of generating powder by discharge is mostly carried out in immersion, or a large amount of working fluid is easily accumulated in the processing area. On the one hand, it is easy to make it difficult to discharge the produced powder in time. On the other hand, the medium with powder will affect the discharge characteristics, resulting in poor preparation consistency.

[0011] Most existing preparation methods require the base material to be prepared into regular shapes such as rolls, strips, and belts to adapt to the movement of the raw materials during the preparation process. This prolongs the entire preparation process and increases the additional cost of raw material preparation. Summary of the invention

[0012] The purpose of the present invention is to provide a highly efficient arc discharge powder preparation device and method assisted by a transverse magnetic field, which accelerates the arc plasma deviation through the assistance of the magnetic field, increases the plasma deviation, generates molten metal faster and in a larger range, and increases the preparation efficiency. The magnetic field accelerates the ejection of the molten metal, the degree of fragmentation is higher, and the amount of fine powder generated is increased.

[0013] To achieve the above-mentioned objectives, the present invention provides a transverse magnetic field-assisted high-efficiency arc discharge powder preparation device, comprising a transverse magnetic field, a discharge system, a liquid supply system, a gas supply system, a motion control system and a product filtration and collection system, wherein the discharge system is respectively connected to the liquid supply system, the gas supply system and the motion control system, and the liquid supply system is connected to the product filtration and collection system.

[0014] Preferably, the discharge system includes a discharge power supply, and the discharge power supply is connected to the positive electrode brush and the negative electrode brush respectively through a discharge state monitoring module, and the positive electrode brush and the negative electrode brush are respectively fixed on the positive electrode raw material and the negative electrode raw material.

[0015] Preferably, the transverse magnetic field is provided by a permanent magnet or an electromagnet arranged between the positive electrode material and the negative electrode material electrode pair, and is used to drive the discharge plasma to deviate or elongate, thereby controlling the energy distribution and powder making effect during the discharge process.

[0016] Preferably, the liquid supply system includes a high-speed fluid nozzle, which is connected to a liquid storage tank via a flushing pipe, and is fixed in a sealed protective cover via a fluid nozzle bracket. The high-speed fluid nozzle is aligned with the discharge area to enhance the discharge effect of the erosion products and enhance the deionization effect. A liquid storage tank is located below the material electrode pair, and a plurality of filters are arranged inside the liquid storage tank to filter the electro-erosion powder particles, and the bottom is connected to a pumping system, which is used to pump out the working fluid in the liquid storage tank and supply it to the high-speed fluid nozzle.

[0017] Preferably, the gas supply system comprises a gas nozzle, the gas nozzle is embedded in the sealing protective cover, and the gas nozzle is connected to the gas tank via a gas pipeline.

[0018] Preferably, the motion control system comprises a positive electrode rotation module, a negative electrode rotation module and a raw material feeding module, the positive electrode rotation module and the negative electrode rotation module are connected to the positive electrode raw material and the negative electrode raw material respectively, and the raw material feeding module is connected to the negative electrode brush.

[0019] Preferably, the multi-stage powder collection system comprises a multi-stage screening system, and the multi-stage screening system consists of a plurality of powder collecting boxes arranged at equal distances.

[0020] A method for preparing high-efficiency arc discharge powder assisted by a transverse magnetic field comprises the following steps:

[0021] S1. Connect the positive electrode raw material and the negative electrode raw material to the discharge power supply through the positive electrode brush and the negative electrode brush, and make the negative electrode raw material close to the positive electrode raw material through the raw material feeding module;

[0022] S2. When the distance is sufficient, the discharge gap is broken down, generating arc discharge plasma, melting the positive electrode raw materials and the negative electrode raw materials. The molten metal is broken and cooled into fine metal powder under the joint action of the high-speed fluid nozzle and the transverse magnetic field, and quickly leaves the discharge gap and enters the liquid storage tank under the joint action of its own gravity, liquid flushing force, rotating centrifugal force and electromagnetic force;

[0023] S3. After the molten metal leaves the molten pool, it is cooled by air or working fluid, and then quickly shrinks into a sphere and solidifies under the action of surface tension. Together with the working fluid, it enters the liquid storage tank under the action of gravity and flow field force.

[0024] S4. The two-phase flow liquid mixed with metal powder entering the liquid storage tank passes through a multi-stage screening system to obtain metal particles of different particle sizes, which are collected by a powder collecting box.

[0025] Preferably, in step S1, the positive electrode and negative electrode materials are raw materials to be powdered, and their components are selected from corresponding conductive materials according to the requirements of the desired powdering, and there are no special requirements for their shapes. During powdering, the positive electrode or the negative electrode rotates alone under the drive of the corresponding rotating system, or the positive electrode and the negative electrode rotate simultaneously and in opposite directions.

[0026] Preferably, in step S2, when the discharge consumes the material to a certain extent, making the gap too large and the discharge unstable or stopped, the positive and negative electrode raw material rotation system and the negative electrode feeding system are driven to replace the discharge area to ensure the preparation continuity;

[0027] The arrangement of the magnetic field is directional, and the direction of the magnetic field is the same as the direction of the fluid force, and the position of the magnetic field is arranged around the discharge area.

[0028] Therefore, the present invention adopts a transverse magnetic field assisted high-efficiency arc discharge powder preparation device and method of the above structure, which has the following beneficial effects:

[0029] (1) The present invention utilizes a magnetic field to elongate the plasma, increase the melting area, and improve the degree of fragmentation of the molten metal, thereby increasing the yield of fine powder and improving the preparation efficiency.

[0030] (2) The present invention accelerates the metal particles to leave the discharge electrodes through the magnetic field to avoid short circuit, speeds up the plasma deviation to avoid excessive burning of the particles, and ensures the quality of the prepared particles.

[0031] (3) The present invention realizes the transfer of the discharge point through discharge state monitoring and motion control, and updates the discharge medium through fluid flushing to ensure the continuity of preparation.

[0032] (4) The present invention can realize the preparation using waste materials without the need for special treatment of the raw materials, thus shortening the entire preparation process and reducing the preparation cost.

[0033] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of a transverse magnetic field-assisted high-efficiency arc discharge powder preparation device and method of the present invention;

[0035] Figure 2 It is a structural schematic diagram of a transverse magnetic field-assisted high-efficiency arc discharge powder preparation device and method of the present invention;

[0036] Figure 3 The schematic diagram of the structure of patent CN 112719277A, which is the background technology of the specification;

[0037] Reference numerals

[0038] 1. Discharge status monitoring module, 2. Positive electrode raw material, 3. Transverse magnetic field, 4. High-speed fluid nozzle, 5. Sealing protective cover, 6. Fluid nozzle bracket, 7. Negative electrode raw material, 8. Gas nozzle, 9. Gas tank, 10. Raw material feeding module, 11. Discharge power supply, 12. Liquid storage tank, 13. Liquid extraction system, 14. Multi-stage screening system, 15. Powder collection box, 16 Liquid storage tank, 17. Positive electrode brush, 18. Negative electrode brush, 19. Positive electrode rotation module, 20. Negative electrode rotation module. DETAILED DESCRIPTION

[0039] The technical solution of the present invention is further described below through the accompanying drawings and embodiments.

[0040] Unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0041] Example

[0042] like Figure 1 The present invention provides a transverse magnetic field-assisted high-efficiency arc discharge powder preparation device, comprising a discharge system, a liquid supply system, a gas supply system, a motion control system and a product filtering and collecting system, wherein the discharge system is respectively connected to the liquid supply system, the gas supply system and the motion control system, and the liquid supply system is connected to the product filtering and collecting system.

[0043] The discharge system includes a discharge power supply 11, which is connected to a positive electrode brush 17 and a negative electrode brush 18 through a discharge state monitoring module. The positive electrode brush 17 and the negative electrode brush 18 are fixed on the positive electrode raw material 2 and the negative electrode raw material 7 respectively.

[0044] The liquid supply system includes a high-speed fluid nozzle 4, which is embedded in a sealed protective cover 5 and fixed by a fluid nozzle bracket 6. The bottom of the high-speed fluid nozzle 4 is connected to the transverse magnetic field 3. The bottom of the transverse magnetic field 3 is a liquid storage tank 12. The liquid storage tank 12 is tightly connected to the sealed protective cover 5 and the bottom of the liquid storage tank 12 is connected to a liquid pumping system 13. The top of the high-speed fluid nozzle 4 is connected to a liquid storage tank 16, and the liquid storage tank 14 is connected to the liquid pumping system 13 through a multi-stage powder collection system.

[0045] The gas supply system comprises a gas nozzle 8 , which is embedded in one side of the sealing protective cover 5 and connected to a gas tank 9 .

[0046] The motion control system includes a positive electrode rotation module 19, a negative electrode rotation module 20 and a raw material feeding module 10. The positive electrode rotation module 19 and the negative electrode rotation module 20 are respectively connected to the positive electrode raw material 2 and the negative electrode raw material 7 and can drive them to rotate. The raw material feeding module 10 is connected to the raw material electrode and can be fed under the drive of the servo system.

[0047] The multi-stage powder collection system includes a multi-stage screening system 14, which is composed of a plurality of powder collecting boxes 15 with filters arranged at equal distances.

[0048] A method for preparing high-efficiency arc discharge powder assisted by a transverse magnetic field comprises the following steps:

[0049] S1. Connect the positive electrode raw material 2 and the negative electrode raw material 7 to the discharge power supply 11 through the positive electrode brush 17 and the negative electrode brush 18, and make the negative electrode raw material 7 close to the positive electrode raw material 2 through the raw material feeding module 10.

[0050] S2, when the distance is sufficient, the discharge gap is broken down, arc plasma is generated, and the positive electrode raw material 2 and the negative electrode raw material 7 are melted. The molten metal is broken and cooled into fine metal powder under the joint action of the high-speed fluid nozzle 4 and the transverse magnetic field 3, and quickly leaves the discharge gap under the joint action of its own gravity, liquid flushing force, rotating centrifugal force and electromagnetic force, and enters the liquid storage tank 12;

[0051] S3, the liquid pumping system 13 pumps the liquid mixed with metal powder into the multi-stage screening system at the bottom of the liquid storage tank 12, and obtains metal particles of different particle sizes through graded screening, and is collected by the powder collecting box 15.

[0052] In step S1, the positive electrode raw material 2 and the negative electrode raw material 7 are raw materials to be powdered, and their components are selected from corresponding conductive materials according to the requirements of the desired powdering, and there are no special requirements for their shapes. During powdering, the positive electrode or the negative electrode rotates alone or the positive electrode and the negative electrode rotate simultaneously and in opposite directions under the drive of the corresponding rotating system; the positive electrode raw material 2 and the negative electrode raw material 7 select the same or different conductive materials according to requirements.

[0053] In step S2, when the discharge consumes material to a certain extent, making the gap too large and the discharge unstable or stopped, the positive electrode raw material rotation system 19, the negative electrode raw material rotation system 20 and the negative electrode feeding system 10 are driven to replace the discharge area to ensure the preparation continuity.

[0054] In step S2, the arrangement of the transverse magnetic field 3 is directional, and the direction of the magnetic field is the same as the direction of the fluid force, and the position of the magnetic field is arranged around the discharge area. The magnetic poles of the transverse magnetic field 3 are arranged on both sides of the processing area or in the axial direction, so that the direction of the magnetic field is perpendicular to the axis direction of the electrode pair, where the transverse in the transverse magnetic field 3 means perpendicular to the axis of the electrode pair.

[0055] The entire liquid supply system ensures the circulation of high-speed fluid, making the powder preparation continuous; the preparation process is carried out in a closed environment using a sealed protective cover, and the protective gas in the gas tank is input into the sealed area through a gas nozzle to prevent oxidation of the prepared metal particles.

[0056] The high-speed liquid nozzle bracket is fixed on the raw material feeding module and can change position with the feeding of the negative electrode material. At the same time, the nozzle direction is adjustable, ensuring that high-speed liquid is always rushed into the discharge area. The gas supply system provides a protective gas that does not react with the prepared metal to protect the prepared metal powder. Metal particles with different particle sizes can be obtained by adjusting the power supply parameters, the high-speed fluid flushing speed and the magnetic field strength. Process parameters: the magnetic field strength is adjustable between 50mT and 2T, the current is adjustable between 10-5000A, the voltage is adjustable between 20-60V, the current is a DC pulse current, and the pulse width and pulse interval are adjustable to control the particle size distribution of the generated powder. In the present invention, the protective gas is helium, CO2, N2 or argon. The working fluid is deionized water or a deionized water-based liquid.

[0057] The present invention utilizes a magnetic field to improve the preparation efficiency from two aspects. On the one hand, the magnetic field accelerates the arc plasma offset and increases the plasma offset, thereby increasing the erosion area and obtaining more molten metal; on the other hand, the magnetic field promotes the ejection of the molten metal, making it fully fragmented and obtaining more molten metal droplets. Under the joint action of the magnetic field and the flow field, the arc plasma is prevented from staying for a long time, effectively reducing the action time of the arc plasma on the metal particles and protecting the metal powder from excessive ablation. Under the joint action of its own gravity, liquid scouring force, and magnetic and electric field forces, the molten metal liquid is rapidly and fully fragmented, effectively reducing the generation of large-size particles. The generated particles also quickly leave the discharge electrode under this action, avoiding accumulation and causing short circuit, thereby improving the stability of the preparation. Through irregular-shaped raw materials, discharge state detection and motion control, the continuous preparation of metal particles is realized, without the need for raw material preparation, and processing waste can be used for development, shortening the process flow and reducing costs.

[0058] Therefore, the present invention adopts the above-mentioned transverse magnetic field-assisted high-efficiency arc discharge powder preparation device and method, and uses the magnetic field to stretch the plasma, increase the melting area, and improve the degree of metal liquid fragmentation, which can increase the fine powder recovery rate and improve the preparation efficiency. The magnetic field accelerates the metal particles to leave the discharge electrodes to avoid short circuits, and accelerates the plasma offset to avoid excessive burning of particles, thereby ensuring the quality of the prepared particles. The transfer of the discharge point is achieved through discharge state monitoring and motion control, and the discharge medium is updated through fluid flushing to ensure the continuity of the preparation. It is possible to use waste materials for preparation without special treatment of the raw materials, shortening the entire preparation process and reducing the preparation cost.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A transverse magnetic field assisted high-efficiency arc discharge powder preparation device, characterized in that: It includes a transverse magnetic field, a discharge system, a liquid supply system, an air supply system, a motion control system and a product filtering and collecting system. The discharge system is connected to the liquid supply system, the air supply system and the motion control system respectively, and the liquid supply system is connected to the product filtering and collecting system.

2. The transverse magnetic field assisted high-efficiency arc discharge powder preparation device according to claim 1, characterized in that: The discharge system comprises a discharge power supply, and the discharge power supply is connected to a positive electrode brush and a negative electrode brush respectively through a discharge state monitoring module, and the positive electrode brush and the negative electrode brush are respectively fixed on a positive electrode raw material and a negative electrode raw material.

3. The transverse magnetic field assisted high-efficiency arc discharge powder preparation device according to claim 2, characterized in that: The transverse magnetic field is provided by a permanent magnet or an electromagnet arranged between the positive electrode material and the negative electrode material electrode pair, and is used to drive the discharge plasma to deviate or elongate, thereby controlling the energy distribution and powder making effect during the discharge process.

4. The transverse magnetic field assisted high-efficiency arc discharge powder preparation device according to claim 1, characterized in that: The liquid supply system includes a high-speed fluid nozzle, which is connected to a liquid storage tank via a flushing pipe. The high-speed fluid nozzle is fixed in a sealed protective cover through a fluid nozzle bracket. The high-speed fluid nozzle is aligned with the discharge area to enhance the discharge effect of the erosion products and enhance the deionization effect. The liquid storage tank is located below the material electrode pair. There are multiple filter screens inside the liquid storage tank to filter the electro-erosion powder particles, and the bottom is connected to a pumping system. The pumping system is used to extract the working fluid in the liquid storage tank and supply it to the high-speed fluid nozzle.

5. The transverse magnetic field assisted high-efficiency arc discharge powder preparation device according to claim 3, characterized in that: The gas supply system comprises a gas nozzle, which is embedded in the sealing protective cover and connected to the gas tank via a gas pipeline.

6. The transverse magnetic field assisted high-efficiency arc discharge powder preparation device according to claim 2, characterized in that: The motion control system includes a positive electrode rotation module, a negative electrode rotation module and a raw material feeding module. The positive electrode rotation module and the negative electrode rotation module are respectively connected to the positive electrode raw material and the negative electrode raw material and can drive them to rotate. The raw material feeding module is connected to the negative electrode brush and can be fed under the drive of the servo system.

7. The transverse magnetic field assisted high-efficiency arc discharge powder preparation device according to claim 1, characterized in that: The multi-stage powder collection system includes a multi-stage screening system, and the multi-stage screening system is composed of a plurality of powder collection boxes with filter screens.

8. A method for preparing high-efficiency arc discharge powder assisted by a transverse magnetic field, using a high-efficiency arc discharge powder preparation device assisted by a transverse magnetic field according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Connect the positive electrode raw material and the negative electrode raw material to the discharge power supply through the positive electrode brush and the negative electrode brush, and make the negative electrode raw material close to the positive electrode raw material through the raw material feeding module; S2. When the distance is sufficient, the discharge gap is broken down, generating arc discharge plasma, melting the positive electrode raw materials and the negative electrode raw materials. The molten metal is broken and cooled into fine metal powder under the joint action of the high-speed fluid nozzle and the transverse magnetic field, and quickly leaves the discharge gap and enters the liquid storage tank under the joint action of its own gravity, liquid flushing force, rotating centrifugal force and electromagnetic force; S3. After the molten metal leaves the molten pool and is cooled by air or working fluid, it quickly shrinks into a sphere and solidifies under the action of surface tension, and enters the liquid storage tank together with the working fluid under the action of gravity and flow field force; S4. The two-phase flow liquid mixed with metal powder entering the liquid storage tank passes through a multi-stage screening system to obtain metal particles of different particle sizes, which are collected by a powder collecting box.

9. The method for preparing high-efficiency arc discharge powder assisted by a transverse magnetic field according to claim 8, characterized in that: In step S1, the positive electrode and negative electrode materials are raw materials to be powdered, and their components are selected from corresponding conductive materials according to the requirements of the desired powdering, and there are no special requirements for their shapes. During powdering, the positive electrode or the negative electrode rotates alone under the drive of the corresponding rotating system, or the positive electrode and the negative electrode rotate simultaneously and in opposite directions.

10. The method for preparing high-efficiency arc discharge powder assisted by a transverse magnetic field according to claim 9, characterized in that: In step S2, when the discharge consumes the material to a certain extent, causing the gap to be too large and the discharge to stop, the positive and negative electrode raw material rotation system and the negative electrode feeding system are driven to replace the discharge area to ensure the preparation continuity; The arrangement of the magnetic field is directional, and the direction of the magnetic field is the same as the direction of the fluid force, and the position of the magnetic field is arranged around the discharge area.

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