Alloy powder preparation device and method

Abstract

The present invention discloses an alloy powder preparation device and method, and relates to the technical field of metal powder manufacturing. The alloy powder preparation device includes an atomization bin, a gas pressure component, a plasma torch and a wire feeding component. The gas pressure component is connected to the atomization bin, and the gas pressure component is used to adjust the gas pressure and gas content in the atomization bin; the plasma torch is arranged on the atomization bin, and a heating head for placing a first material is provided on the plasma torch, wherein one end of the heating head provided on the plasma torch extends into the atomization bin; the wire feeding component is arranged on the atomization bin, and the wire feeding component is used to convey the second material to dock with the heating head; the plasma torch is used to melt the first material and the second material to form an alloy solution, and the gas pressure component is also used to atomize the alloy solution to form granular powder. The technical solution of the present invention shortens the entire metal powder preparation process, reduces preparation time, and saves preparation cost.

Description

Technical Field

[0001] The invention relates to the technical field of metal powder manufacturing, and in particular to a device and method for preparing alloy powder. Background Art

[0002] Plasma method is a method for preparing metal powder. It heats the metal in a gas medium to make it melt, cool, and crystallize to form metal powder, and then obtains the metal powder product after coating and passivation treatment in an inert atmosphere. Due to the high temperature of plasma, this method can prepare almost all metal powders, and the obtained powder particles have a narrow diameter distribution, are pollution-free, and are easy to collect. According to the power supply type and heating method, the plasma method can be divided into radio frequency plasma method, direct current plasma method, and mixed plasma method. The working principle is to use the high temperature formed by plasma to melt and evaporate the metal raw materials, and condense them into spheres under the action of surface tension, and then condense and collect them.

[0003] In the prior art, when preparing metal powder, usually a variety of alloy materials are first mixed and smelted to prepare metal alloy ingots / wires and other raw materials, and then the alloy ingots / wires and other raw materials are used to prepare the final alloy powder using plasma technology. The process is long, time-consuming and costly. Summary of the invention

[0004] The main purpose of the present invention is to provide an alloy powder preparation device and method, aiming to solve the technical problems of long process steps, long time consumption and high cost in the metal powder preparation process in the prior art.

[0005] To achieve the above object, the present invention provides an alloy powder preparation device, the alloy powder preparation device comprising:

[0006] Atomization chamber;

[0007] A gas pressure component, the gas pressure component is connected to the atomization bin, and the gas pressure component is used to adjust the gas pressure and gas content in the atomization bin;

[0008] A plasma torch, the plasma torch being arranged on the atomizing chamber, the plasma torch being provided with a heating head for placing the first material, wherein one end of the plasma torch provided with the heating head extends into the atomizing chamber;

[0009] A wire feeding assembly, the wire feeding assembly being arranged on the atomizing chamber and being used for conveying the second material to dock with the heating head;

[0010] The plasma torch is used to melt the first material and the second material to form an alloy solution, and the gas pressure component is also used to atomize the alloy solution to form granular powder.

[0011] In one embodiment, the heating head comprises:

[0012] A fixing member, one end of which has a discharge port, and the other end of which is connected to the plasma torch;

[0013] A heat conducting member is disposed in the fixing member, and a gap for placing the first material is provided between an edge of the heat conducting member and a side wall of the fixing member.

[0014] In one embodiment, the heat conducting member comprises:

[0015] a first heat conducting portion;

[0016] The second heat conducting part is arranged on a side of the first heat conducting part facing the discharge port, wherein two ends of the first heat conducting part protrude from the second heat conducting part to form a thermal compression zone at two ends of the second heat conducting part.

[0017] In one embodiment, the pneumatic assembly comprises:

[0018] A vacuum machine, the vacuum machine is connected to the atomization chamber through a first pipeline;

[0019] An air supply machine is connected to the atomization bin through a second pipeline, and the air supply machine is used to fill inert gas into the atomization bin to adjust the air pressure in the atomization bin.

[0020] In one embodiment, the air pressure assembly further includes a third pipeline, the atomization chamber is provided with a through hole, and the position where the first material and the second material are melted corresponds to the position of the through hole;

[0021] One end of the third pipeline is connected to the gas supply machine, and the other end is connected to the through hole. The gas supply machine is used to provide carrier gas into the third pipeline and atomize the alloy solution through the carrier gas.

[0022] In one embodiment, the wire feeding assembly comprises:

[0023] A straightener, wherein one end of the straightener is provided with an inlet for feeding the wire material, and the other end is provided with an outlet;

[0024] A guide member is arranged on the atomization bin, one end of the guide member is connected to the discharge port, and the other end of the guide member is connected to the plasma torch.

[0025] In one embodiment, the alloy powder preparation device further comprises a collection chamber, wherein the collection chamber is disposed at the bottom of the atomization chamber and is communicated with the atomization chamber.

[0026] In addition, in order to solve the above problems, the present invention also proposes an alloy powder preparation method, which is applied to the alloy powder preparation device as described above, and the alloy powder preparation method comprises:

[0027] Adjusting the gas pressure in the atomization chamber to a preset gas pressure, and controlling the plasma torch to melt the first material and the second material in the atomization chamber to form an alloy solution;

[0028] Obtaining an evaporation rate of the first material by the plasma torch;

[0029] adjusting a feed rate of the second material according to the evaporation rate;

[0030] The alloy solution is atomized to form a particle powder.

[0031] In one embodiment, the step of obtaining the evaporation rate of the first material by the plasma torch comprises:

[0032] Obtaining the saturated vapor pressure, relative atomic mass, universal proportional constant, and heating temperature of the first material;

[0033] The evaporation rate is calculated according to the saturated vapor pressure, relative atomic mass, universal proportionality constant, and heating temperature.

[0034] In one embodiment, the step of adjusting the feeding rate of the second material according to the evaporation rate comprises:

[0035] When the evaporation rate increases, increasing the feed rate;

[0036] As the evaporation rate decreases, the feed rate is reduced.

[0037] The technical solution of the present invention directly sets the first material on the plasma torch, uses the wire feeding assembly to transfer the second material to the plasma torch, uses the high temperature generated by the plasma torch to melt the first material and the second material directly in the atomization chamber, and atomizes the molten metal solution through the gas pressure assembly to form granular metal powder. This shortens the entire metal powder preparation process, reduces preparation time, and saves preparation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0039] Figure 1 A schematic diagram of the structure of the alloy powder preparation device provided by the present invention;

[0040] Figure 2 This is a schematic diagram of the structure of a heating head in the alloy powder preparation device provided by the present invention;

[0041] Figure 3 A schematic diagram of a process of a first embodiment of a method for preparing alloy powder provided by the present invention;

[0042] Figure 4 A schematic flow chart of a second embodiment of the method for preparing alloy powder provided by the present invention;

[0043] Figure 5 This is a schematic flow chart of the third embodiment of the method for preparing alloy powder provided by the present invention.

[0044] Description of Figure Numbers:

[0045] 10. Atomization chamber; 20. Plasma torch; 21. Heating head; 22. Fixing part; 23. Heat-conducting part; 231. First heat-conducting part; 232. Second heat-conducting part; 24. Discharge port; 31. Vacuum machine; 32. Air supply machine; 33. Water cooling module; 34. Exhaust machine; 40. Wire feeding assembly; 41. Straightener; 42. Guide; 50. Collection chamber; 60. Controller; 70. Hot compression zone; 80. Gap.

[0046] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0049] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0050] The invention provides a device for preparing alloy powder.

[0051] See also Figure 1 In one embodiment of the present invention, the alloy powder preparation device includes an atomization bin 10, a gas pressure component, a plasma torch 20 and a wire feeding component 40, wherein the gas pressure component is connected to the atomization bin 10, and the gas pressure component is used to adjust the gas pressure and gas content in the atomization bin 10; the plasma torch 20 is arranged on the atomization bin 10, and the plasma torch 20 is provided with a heating head 21 for placing a first material, wherein the plasma torch 20 is provided with one end of the heating head 21 extending into the atomization bin 10; the wire feeding component 40 is arranged on the atomization bin 10, and the wire feeding component 40 is used to convey the second material to dock with the heating head 21; wherein the plasma torch 20 is used to melt the first material and the second material to form an alloy solution, and the gas pressure component is also used to atomize the alloy solution to form granular powder.

[0052] In this embodiment, the first material is a consumable electrode, which is mounted on the heating head 21 of the plasma torch 20. The second material is a wire-shaped metal strip, which is fed into the atomization chamber 10 through the wire feeding assembly 40.

[0053] When assembling the plasma torch 20 and the wire feeding assembly 40, the positions of the wire feeding assembly 40 and the plasma torch 20 are adjusted so that the discharge position of the wire feeding assembly 40 is docked with the position of the heating head 21. That is, when the second material is separated from the wire feeding assembly 40, it is as close to the first material as possible, so that the plasma torch 20 heats the first material and the second material at the same time and melts them into an alloy solution.

[0054] It should be noted that the wire feeding assembly 40 and the plasma torch 20 are both arranged on the top of the atomization chamber 10 , and sealing rings are provided between the edges of the wire feeding assembly 40 and the plasma torch 20 and the atomization chamber 10 to ensure the sealing inside the atomization chamber 10 .

[0055] A collection chamber 50 is also provided at the bottom of the atomization chamber 10. Figure 1 The top of the collecting chamber 50 is connected to the bottom of the atomizing chamber 10 through a pipeline. By arranging the plasma torch 20 and the wire feeding assembly 40 at the top and the collecting chamber 50 at the bottom, when the alloy solution is atomized, it falls into the collecting chamber 50 at the bottom under the action of gravity.

[0056] As another embodiment, the number of plasma torches 20 can be set to two or more, and multiple plasma torches 20 can be evenly spaced around the wire feeding assembly 40. The first material and the second material are melted by multiple plasma torches 20 to further improve the atomization efficiency of the alloy solution.

[0057] In addition, the atomizing chamber 10 is also connected to the air pressure component through a pipeline, and the air pressure in the atomizing chamber 10 is adjusted under the action of the air pressure component. Moreover, the air pressure component can first extract the air in the atomizing chamber 10, and then fill the inert gas into the atomizing chamber 10. Thus, in the inert gas environment, the first material and the second material are prevented from reacting.

[0058] Specifically, the air pressure assembly includes a vacuum machine 31 and an air supply machine 32. The vacuum machine 31 is connected to the atomization bin 10 through a first pipeline; the air supply machine 32 is connected to the atomization bin 10 through a second pipeline, and the air supply machine 32 is used to fill the inert gas into the atomization bin 10 to adjust the air pressure in the atomization bin 10.

[0059] First, the air in the atomization bin 10 is extracted through the first pipeline by the vacuum machine 31 until the air pressure in the atomization bin 10 reaches a first preset air pressure, which can be set at about 1 Pa, for example, 1 Pa. Subsequently, the air supply machine 32 fills the atomization bin 10 with inert gas through the second pipeline until the air pressure in the atomization bin 10 reaches a second preset air pressure, which can be set at a slightly positive pressure between 1 kPa and 5 kPa, to prevent external gas from flowing into the atomization bin 10.

[0060] In addition, as another embodiment, the pneumatic component also includes a third pipeline, and a through hole is provided on the atomization chamber 10, and the position where the first material and the second material are melted corresponds to the position of the through hole; one end of the third pipeline is connected to the gas supply machine 32, and the other end is connected to the through hole, and the gas supply machine 32 is used to provide a carrier gas into the third pipeline, and atomize the alloy solution through the carrier gas.

[0061] The air supply machine 32 is also connected to the atomization chamber 10 through the third pipeline. The air supply machine 32 delivers high-pressure air into the atomization chamber 10 through the third pipeline. The high-pressure air is ejected through the through hole, and the position of the through hole corresponds to the position where the alloy solution is formed, so the synthetic solution is dispersed by the high-pressure air to form atomized granular metal powder.

[0062] The second pipeline and the third pipeline are independent of each other, that is, the gas supply machine 32 supplies gas alone when adjusting the gas pressure in the atomization chamber 10 or atomizing the alloy solution, so as to avoid mutual influence between the second pipeline and the third pipeline.

[0063] As another embodiment, the alloy powder preparation device also includes a water cooling module 33, which is connected to the atomization bin 10 through a pipeline. Under the action of the water cooling module, the atomization bin 10 can be cooled to prevent the atomization bin 10 from overheating. At the same time, an exhaust fan 34 is also provided, which is also connected to the atomization bin 10 through a pipeline, and is used to discharge excess gas in the atomization bin 10 outside the atomization bin 10 to avoid waste gas accumulation, while maintaining the air pressure in the atomization bin 10 within the set value range.

[0064] The air supply machine 32 , the vacuum machine 31 , the exhaust machine 34 and the water cooling module 33 can all be connected to the controller 60 via signals, so that the on-site operator can monitor and adjust the environment in the atomization chamber 10 through the controller 60 .

[0065] The technical solution of the present invention directly sets the first material on the plasma torch 20, uses the wire feeding assembly 40 to transfer the second material to the plasma torch 20, uses the high temperature generated by the plasma torch 20 to melt the first material and the second material directly in the atomization chamber 10, and atomizes the molten metal solution through the gas pressure assembly to form granular metal powder. This shortens the entire metal powder preparation process, reduces preparation time, and saves preparation costs.

[0066] As an embodiment, the heating head 21 includes a fixing part 22 and a heat conductive part 23, one end of the fixing part 22 has a discharge port 24, and the other end is connected to the plasma torch 20; the heat conductive part 23 is arranged in the fixing part 22, and there is a gap 80 between the edge of the heat conductive part 23 and the side wall of the fixing part 22 for placing the first material.

[0067] Please refer to Figure 2 , the heating head 21 is cylindrical. Usually, the wire feeding assembly 40 is vertically arranged, and the second material is fed from top to bottom. Please refer to Figure 1The plasma torch 20 is tilted, and the second material is disposed at the bottom of the plasma torch 20 so that the first material can contact the second material. The discharge port 24 is disposed on one side of the heating head 21 toward the tilted bottom.

[0068] The discharge port 24 is circular, the heat conducting member 23 is disposed at the center of the fixing member 22, a gap 80 is formed between the edge of the heat conducting member 23 and the edge of the fixing member 22, and the first material is filled in the gap 80. The other end of the fixing member 22 is connected to the plasma torch 20.

[0069] When the plasma power is turned on, the carrier gas of the plasma torch 20 is turned on, the plasma torch 20 is arced, and then the plasma current is gradually adjusted to 50A~900A and the voltage is 50V~150V to keep the arc stable. Among them, the plasma current and voltage need to be determined according to the specific process requirements.

[0070] Under the action of the heat conducting member 23, the heat is conducted to the side of the material outlet 24, so that the first material is brought out of the material outlet 24 and melted with the second material.

[0071] As another embodiment, the heat conducting member 23 includes a first heat conducting part 231 and a second heat conducting part 232, wherein the second heat conducting part 232 is arranged on the side of the first heat conducting part 231 facing the discharge port 24, wherein both ends of the first heat conducting part 231 protrude from the second heat conducting part 232 to form a heat compression zone 70 at both ends of the second heat conducting part 232.

[0072] The first heat conducting portion 231 and the second heat conducting portion 232 can be integrally formed. The first heat conducting portion 231 is located at a side away from the discharge port 24 , and the second heat conducting portion 232 is located at a side close to the discharge port 24 .

[0073] The size of the second heat conducting portion 232 is smaller than that of the first heat conducting portion 231. Figure 2 A stepped structure is formed between the second heat conducting part 232 and the first heat conducting part 231, thereby forming a thermal compression zone 70 at the edge of the second heat conducting part 232. Heat is conducted from the first heat conducting part 231 to the second heat conducting part 232, and the heat is accumulated in the thermal compression zone 70 by suddenly reducing the cross section of the second heat conducting part 232, so that the first material in the gap 80 can be melted and evaporated and brought into the second material to form an alloy solution.

[0074] As an embodiment, the wire feeding assembly 40 includes a straightener 41 and a guide 42, one end of the straightener 41 is provided with an inlet for feeding the wire, and the other end is provided with an outlet 24; the guide 42 is arranged on the atomization bin 10, one end of the guide 42 is connected to the outlet 24, and the other end is connected to the consumable electrode.

[0075] Please refer to Figure 1 The straightener 41 is composed of a plurality of rollers. A row of rollers is provided on each side, and the two rows of rollers are staggered with each other. The second material is in a filament shape and passes between the two rows of rollers. Under the action of the rollers, the second material is straightened to prevent the second material from being entangled.

[0076] The guide member 42 is a long strip structure, and the second material passes through the guide member 42. A sealing ring is provided between the guide member 42 and the atomization chamber 10 for sealing. At the same time, a sealing structure is also provided inside the guide member 42 to prevent the gas in the atomization chamber 10 from overflowing.

[0077] Under the action of the straightener 41 and the guide member 42 , the second material can be smoothly fed into the atomization chamber 10 , thereby preventing the second material from being entangled and knotted during the wire feeding process.

[0078] The present invention also proposes a method for preparing alloy powder, which is applied to the alloy powder preparation device as described above. The specific structure of the alloy powder preparation device refers to the above embodiment. Since the alloy powder preparation method adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Figure 3 , Figure 3 The schematic diagram of the first embodiment of the alloy powder preparation method includes the following steps:

[0079] Step S10: adjusting the gas pressure in the atomization chamber to a preset gas pressure, and controlling the plasma torch to melt the first material and the second material in the atomization chamber to form an alloy solution;

[0080] Step S20: obtaining the evaporation rate of the first material by the plasma torch;

[0081] Step S30: adjusting the feeding speed of the second material according to the evaporation rate;

[0082] Step S40: atomizing the alloy solution to form granular powder.

[0083] First, the air in the atomization bin 10 is extracted through the first pipeline by the vacuum machine 31 until the air pressure in the atomization bin 10 reaches a first preset air pressure, which can be set at about 1 Pa, for example, 1 Pa. Subsequently, the air supply machine 32 fills the atomization bin 10 with inert gas through the second pipeline until the air pressure in the atomization bin 10 reaches a second preset air pressure, which can be set at a slightly positive pressure between 1 kPa and 5 kPa, to prevent external gas from flowing into the atomization bin 10.

[0084] The plasma torch 20 is turned on, and the plasma current is adjusted to 50A-900A and the voltage is adjusted to 50V-150V according to the process requirements. The current evaporation rate of the first material is calculated.

[0085] In order to further improve the atomization efficiency, the evaporation rate of the first material can be increased as much as possible, and the feeding speed of the second material can be adjusted to achieve the maximum atomization efficiency while ensuring the melting ratio of the first material and the second material.

[0086] Finally, the alloy solution is atomized by a gas pressure component to form granular metal powder.

[0087] Please refer to Figure 4 , Figure 4 This is a schematic flow chart of a second embodiment of a method for preparing alloy powder, wherein step S20 comprises:

[0088] Step S21: obtaining the saturated vapor pressure, relative atomic mass, universal proportional constant, and heating temperature of the first material;

[0089] Step S22: Calculating the evaporation rate according to the saturated vapor pressure, relative atomic mass, universal proportional constant, and heating temperature.

[0090] The saturated vapor pressure and the relative atomic mass are obtained according to the material properties of the first material, the universal proportional constant is obtained according to the properties of the inert gas, and the heating temperature can be obtained by measuring the plasma torch 20 .

[0091] The evaporation rate of the first material can be calculated according to Expression 1:

[0092] Expression 1: I0=p c [M / 2πRT] 1 / 2 ;

[0093] Where I0 is the evaporation rate, p c is the saturated vapor pressure, M is the relative atomic mass, R is the universal proportional constant, and T is the heating temperature. After calculating the evaporation rate, the feeding speed of the wire feeding assembly 40 can be adjusted accordingly according to the evaporation rate, that is, the moving speed of the second material in the wire feeding assembly 40.

[0094] Specifically, the feeding weight of the second material per unit time can be calculated according to the wire feeding speed. The feeding weight can be calculated according to Expression 2:

[0095] Expression 2: m i =ρv(πd 2 / 4) ;

[0096] Among them, m iis the feed weight, ρ is the material density of the second material, d is the diameter of the second material, and v is the feed speed. By adjusting the feed speed, the feed weight corresponding to the second material can be obtained, thereby controlling the melting ratio of the first material and the second material per unit time and ensuring the powder ratio of the alloy after atomization.

[0097] Please refer to Figure 5 , Figure 5 The schematic diagram of the process of the third embodiment of the alloy powder preparation method is shown in step S30.

[0098] Step S31: when the evaporation rate increases, increasing the feeding speed;

[0099] Step S32: When the evaporation rate decreases, reducing the feed rate.

[0100] According to different process requirements, the corresponding values ​​of evaporation rate and feeding speed are not unique, but whenever the evaporation rate increases, the feeding speed needs to be increased to keep the melting ratio of the first material and the second material unchanged. On the contrary, when the evaporation rate decreases, the feeding speed is correspondingly reduced. In this way, the atomization efficiency can be adjusted while ensuring the melting ratio of the first material and the second material is consistent.

[0101] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An alloy powder preparation device, characterized in that: The alloy powder preparation device comprises: Atomization chamber; A gas pressure component, the gas pressure component is connected to the atomization bin, and the gas pressure component is used to adjust the gas pressure and gas content in the atomization bin; A plasma torch, the plasma torch being arranged on the atomizing chamber, the plasma torch being provided with a heating head for placing the first material, wherein one end of the plasma torch provided with the heating head extends into the atomizing chamber; A wire feeding assembly, the wire feeding assembly being arranged on the atomizing chamber and being used for conveying the second material to dock with the heating head; The plasma torch is used to melt the first material and the second material to form an alloy solution, and the gas pressure component is also used to atomize the alloy solution to form a granular powder; The heating head comprises: A fixing member, one end of which has a discharge port, and the other end of which is connected to the plasma torch; A heat-conducting member, wherein the heat-conducting member is disposed in the fixing member, and a gap for placing the first material is provided between an edge of the heat-conducting member and a side wall of the fixing member; The heat conducting member comprises: a first heat conducting portion; The second heat conducting part is arranged on a side of the first heat conducting part facing the discharge port, wherein two ends of the first heat conducting part protrude from the second heat conducting part to form a thermal compression zone at two ends of the second heat conducting part.

2. The alloy powder preparation device according to claim 1, characterized in that: The pneumatic assembly comprises: A vacuum machine, the vacuum machine is connected to the atomization chamber through a first pipeline; An air supply machine is connected to the atomization bin through a second pipeline, and the air supply machine is used to fill inert gas into the atomization bin to adjust the air pressure in the atomization bin.

3. The alloy powder preparation device according to claim 2, characterized in that: The air pressure assembly further includes a third pipeline, the atomizing chamber is provided with a through hole, and the position where the first material and the second material are melted corresponds to the position of the through hole; One end of the third pipeline is connected to the gas supply machine, and the other end is connected to the through hole. The gas supply machine is used to provide carrier gas into the third pipeline and atomize the alloy solution through the carrier gas.

4. The alloy powder preparation device according to claim 1, characterized in that: The wire feeding assembly comprises: A straightener, wherein one end of the straightener is provided with an inlet for feeding the wire material, and the other end is provided with an outlet; A guide member, wherein the guide member is arranged on the atomization bin, one end of the guide member is connected to the discharge port of the straightener, and the other end of the guide member is connected to the plasma torch.

5. The alloy powder preparation device according to claim 1, characterized in that: The alloy powder preparation device further comprises a collecting chamber, which is arranged at the bottom of the atomization bin and is communicated with the atomization bin.

6. A method for preparing alloy powder, characterized in that: The alloy powder preparation method is applied to the alloy powder preparation device according to any one of claims 1 to 5, and the alloy powder preparation method comprises: Adjusting the gas pressure in the atomization chamber to a preset gas pressure, and controlling the plasma torch to melt the first material and the second material in the atomization chamber to form an alloy solution; Obtaining an evaporation rate of the first material by the plasma torch; adjusting a feed rate of the second material according to the evaporation rate; The alloy solution is atomized to form a particle powder.

7. The method for preparing alloy powder according to claim 6, characterized in that: The step of obtaining the evaporation rate of the first material by the plasma torch comprises: Obtaining the saturated vapor pressure, relative atomic mass, universal proportional constant, and heating temperature of the first material; Calculating the evaporation rate according to the saturated vapor pressure, relative atomic mass, universal proportional constant, and heating temperature; The saturated vapor pressure, relative atomic mass, universal proportional constant, heating temperature, and evaporation rate satisfy the following relationship: I0=p c [M / 2πRT] 1 / 2 ; Where I0 is the evaporation rate, p c is the saturated vapor pressure, M is the relative atomic mass, R is the universal proportional constant, and T is the heating temperature.

8. The method for preparing alloy powder according to claim 6, characterized in that: The step of adjusting the feeding rate of the second material according to the evaporation rate comprises: When the evaporation rate increases, increasing the feed rate; As the evaporation rate decreases, the feed rate is reduced.

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