Metal powder atomization equipment

Abstract

The invention discloses a metal powder atomization device, including a cabin; a feed port is provided at one end of the cabin, and at least three rotators are horizontally provided at the other end of the cabin; each rotator comprises a vertically arranged rotator shaft and two rotator turntables arranged on the rotator shaft; an atomizing turntable is also provided at the other end of the cabin, and the atomizing turntable comprises an atomizing turntable plate and a turntable truncated table arranged on the upper and lower surfaces of the atomizing turntable plate; the atomizing turntable is assembled between at least three rotators through the turntable truncated table; a support rod is also vertically provided at the other end of the cabin, and a melter is fixed at the upper end of the support rod, and the metal liquid column flowing out of the melter falls onto the atomizing turntable plate, and points to the feed port with the tangent direction of the atomizing turntable movement. The present invention is aimed at the fine powder segment <50μm, significantly improves the yield of fine powder, and reduces the cost.

Description

Technical Field

[0001] The invention relates to the technical field of powder metallurgy, and in particular to a metal powder atomization device. Background Art

[0002] Metal powder is a kind of metal upstream raw material widely used in powder metallurgy industry and additive manufacturing industry, and its particle size range is usually between 15-300μm. Among them, general powder metallurgy usually uses 50-150μm, while additive manufacturing technologies such as selective laser melting (SLM) usually use 15-50μm powder as raw material.

[0003] In order to control impurities, the industry generally uses atomization to prepare metal powders. According to different atomization principles, it is usually divided into gas atomization, water atomization, plasma atomization, centrifugal atomization, ultrasonic atomization, etc.

[0004] For common metals such as aluminum, titanium, steel, and nickel, the gas atomization method has the most mature technology development, occupies a large market share, and has many branches. Typical technologies include EIGA (electrode induction-melting inert gas atomization) and VIGA (vacuum induction melting inert gas atomization). The basic principle is to use high-pressure gas to spray molten metal liquid to obtain atomized powder, which is easy to control; water atomization method uses high-pressure water flow to spray molten metal to obtain atomized powder. Since contact with water medium can easily introduce impurities, it is currently only used in a small amount of steel powder production; plasma atomization uses a plasma torch heat source as a fluid to provide atomization kinetic energy and thermal energy, and uses metal wire as atomization raw material, which can provide better atomization effect, but it is subject to material limitations (some alloys are not easy to make wire); centrifugal atomization uses centrifugal force as the atomization power. The current mainstream technology is plasma rotating electrode atomization technology (PREP, plasma rotating electrode The process is a high-speed cylindrical rod that rotates along its axis and is melted at one end near the flame of a plasma torch. The droplets are thrown out by centrifugal force to obtain atomized powder. However, the atomized particle size of this principle is strongly affected by the rotation speed (the higher the rotation speed, the finer the particle size). The rotation speed provided by current industrial capacity is difficult to produce higher returns in the 15-50μm range. The effect of ultrasonic atomization is very good, but it is restricted by the difficulty of realizing high-power and long-life transducers. The current production capacity is difficult to meet the needs of industrial mass production.

[0005] In recent years, with the development of metal additive manufacturing technology, the industry's demand for fine-particle metal powders (15-150μm) has soared, which has also led to a significant change in the proportion of mainstream atomization technology. The metal powder used in additive manufacturing should meet the characteristics of low cost, low impurity content, good fluidity, and few defects in the powder itself. Therefore, the current atomization technology school that the industry can meet for additive manufacturing is mainly based on gas atomization technology, and a small amount of plasma rotating electrode atomization process based on centrifugal atomization technology provides some coarse powders in the particle size range of 50-150μm.

[0006] Generally speaking, the accuracy of powder bed metal additive manufacturing technology mainly depends on the particle size of the powder used for the raw materials. It is generally believed that the finer the particle size, the higher the accuracy. However, if the powder particle size is very fine (such as <15μm), it is difficult to control the content of surface contamination impurities due to the surge in the surface energy of the powder. Therefore, for powder bed additive manufacturing technologies with higher precision requirements, such as SLM, powders with a particle size of 15-50μm are usually used. The industry also has EBM (electron beam melting) electron beam cladding additive manufacturing technology, which uses 50-150μm powder. The reason for using coarser powder is generally believed to be that the thermal sputtering effect of the electron beam is large. In order to prevent the powder from flying away when heated, larger particles are required to obtain positional stability during the scanning melting process.

[0007] The current mainstream powder bed additive technology has higher precision in forming parts than other metal additive technologies, but it has low efficiency and high one-time cost. If the cost of secondary processing to restore dimensional accuracy of the parts after forming is considered, the final cost of powder bed metal additive manufacturing technology for medium-complexity parts is lower. Considering the cost surge and process complexity caused by post-processing accuracy issues, in fact, SLM-type fine powder (15-50μm) powder bed metal additive manufacturing technology has better economic advantages for medium-complexity parts.

[0008] In addition, the yield of fine powder (<50μm) of various atomization technologies is low, because the cost of various atomization systems to make the powder finer is more complicated. For Ti6Al4V alloy, based on the current industrial capabilities of various technologies, the yield of fine powder (<50μm) produced by gas atomization technology is generally 20-30wt.%, plasma atomization is usually 40wt.%, and centrifugal atomization is usually <10wt.%.

[0009] In summary, the current high demand for fine powder and low yield in the industry clearly prove that the current mainstream atomization technology is unreasonable. The main contradictions are:

[0010] (1) Gas atomization technology can provide a good fine powder yield, but because gas atomization technology introduces pore defects during atomization, there are many inherent defects in the powder. These defects will bring hidden dangers that are difficult to eliminate to the additive parts. Therefore, its economic efficiency comes at the expense of safety.

[0011] (2) Improved atomization technology such as plasma atomization can solve the problem of low fine powder yield, and its powder quality is also high. However, since its raw materials must be finely processed wire, its cost advantage is offset by the more expensive wire process, and its applicable alloy range is limited (it cannot be used for alloys with poor plasticity or too high strength), which affects the universality of the technology.

[0012] In principle, centrifugal atomization technology does not require the participation of gas, so its powder is clean, the hollow rate is extremely low, and the powder quality is ideal. However, it is limited by the rotation speed provided by current industrial capabilities, resulting in an extremely low fine powder yield of this technology, which is almost not economical. Summary of the invention

[0013] In view of the problems existing in the prior art, the purpose of the present invention is to provide a metal powder atomization equipment, especially for the fine powder segment (<50μm) of powder bed additive manufacturing powder, which can significantly improve the yield of fine powder, with excellent powder quality and low cost.

[0014] In order to achieve the above object, the present invention adopts the following technical solutions to achieve it.

[0015] A metal powder atomization device comprises: a cabin; a discharge port is arranged at one end of the bottom of the cabin, and at least three rotators are horizontally arranged at the other end of the bottom of the cabin; each of the rotators comprises a vertically arranged rotator shaft, two rotator turntables are arranged on the rotator shaft, and the rotator shaft passes through the center of each rotator turntable respectively; a gap is arranged between the two rotator turntables; an atomizing turntable is also arranged at the other end of the cabin, the atomizing turntable comprises an atomizing turntable plate, and turntable cones are symmetrically arranged at the centers of the upper and lower surfaces of the atomizing turntable plate respectively; the atomizing turntable is assembled between the at least three rotators through the turntable cones, and the atomizing turntable plate is located in the gap between the two rotator turntables of each rotator; a support rod is also vertically arranged at the other end of the cabin, a melter is fixed to the upper end of the support rod, a metal liquid column flowing out of the melter falls to the upper surface of the atomizing turntable plate, and points to the discharge port along the tangent direction of the movement of the atomizing turntable.

[0016] The characteristics and further improvements of the technical solution of the present invention are:

[0017] Preferably, the edges of the two rotator turntables of each rotator are respectively provided with first beveled surfaces in opposite directions to each other; the edges of the two turntable cones are respectively provided with second beveled surfaces in opposite directions to the first beveled surfaces of the corresponding rotator turntables; and the assembly between the atomizing turntable and at least three rotators is achieved through the mutual cooperation between the corresponding second beveled surfaces and the first beveled surfaces.

[0018] Preferably, there are three rotators.

[0019] Further preferably, the radii of the rotator turntables of the three rotators are equal.

[0020] Further preferably, the radii of the rotator disks of the two rotators are equal and smaller than the radius of the rotator disk of the other rotator.

[0021] Preferably, the molten metal column flowing out of the melter falls to the edge of the upper surface of the atomizing turntable plate.

[0022] Preferably, the melter comprises a crucible or a conical solenoid induction heater.

[0023] Preferably, the feed discharge port is connected to a storage tank.

[0024] Preferably, a cooling device is also provided in the cabin between the rotator and the discharge port.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The metal powder atomization equipment of the present invention utilizes a turntable to achieve secondary acceleration, so that the centrifugal effect of metal droplets is better, the obtained powder is finer, and the yield of fine powder is significantly improved, while the cost of metal raw materials and equipment manufacturing and maintenance costs are reduced, and the economy is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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 these drawings without paying creative work.

[0028] Figure 1 It is a structural schematic diagram of an embodiment of the metal powder atomization equipment of the present invention;

[0029] Figure 2 It is a structural schematic diagram of an embodiment of a rotator in the metal powder atomization equipment of the present invention;

[0030] Figure 3It is a structural schematic diagram of an embodiment of an atomizing rotating disk in the metal powder atomizing equipment of the present invention;

[0031] Figure 4 It is a three-dimensional structural schematic diagram of an embodiment of the cooperation between the rotator and the atomizing turntable in the metal powder atomizing equipment of the present invention;

[0032] Figure 5 It is a schematic plan view of the structure of an embodiment of the cooperation between the rotator and the atomizing turntable in the metal powder atomizing equipment of the present invention;

[0033] Figure 6 It is a schematic plan view of another embodiment of the cooperation between the rotator and the atomizing turntable in the metal powder atomizing equipment of the present invention;

[0034] Figure 7 It is a schematic diagram of a metal liquid column falling to the edge of an atomizing turntable plate in the metal powder atomizing equipment of the present invention.

[0035] Figure 8 is a schematic diagram of the structure of a crucible;

[0036] Fig. 9 Schematic diagram of the structure of a conical solenoid induction heater.

[0037] above Figure 1-Figure 9 Middle: 1 cabin 1; 2 feeding port; 3 rotator; 4 rotator shaft; 5 rotator turntable; 6 atomizing turntable; 7 atomizing turntable plate; 8 turntable round table; 9 support rod; 10 melter; 11 metal liquid column; 12 first beveled surface; 13 second beveled surface; 14 crucible; 15 conical solenoid induction heater; 151 rod; 152 rod turntable; 153 rod shaft; 154 bracket; 155 conical solenoid; 16 storage tank. DETAILED DESCRIPTION

[0038] 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.

[0039] refer to Figure 1In an embodiment of the present invention, a metal powder atomization device is provided, which is particularly suitable for preparing fine powder segments (<50 μm) of powder bed additive manufacturing powders, and comprises: a cabin 1; a feed port 2 is arranged at one end of the bottom of the cabin 1, and at least three rotators 3 are arranged horizontally at the other end of the bottom of the cabin 1; each of the rotators 3 comprises a vertically arranged rotator shaft 4, two rotator turntables 5 are arranged on the rotator shaft 4, and the rotator shaft 4 passes through the center of each rotator turntable 5 respectively; a gap is arranged between the two rotator turntables 5; an atomization turntable 6 is also arranged at the other end of the cabin 1, and the atomization turntable 6 is arranged at the other end of the cabin 1. The atomizing turntable 6 includes an atomizing turntable plate 7, and turntable cones 8 are symmetrically arranged at the centers of the upper and lower surfaces of the atomizing turntable plate 7; the atomizing turntable 6 is assembled between the at least three rotators 3 through the turntable cone 8, and the atomizing turntable plate 7 is located in the gap between the two rotator turntables 5 of each rotator 3; a support rod 9 is also vertically arranged at the other end of the cabin 1, and a melter 10 is fixed to the upper end of the support rod 9, and a metal liquid column 11 flowing out of the melter 10 falls to the upper surface of the atomizing turntable plate 7, and points to the discharge port 2 along the tangent direction of the movement of the atomizing turntable 6.

[0040] In the above embodiment, the melter 10 is used to load the metal raw material to be atomized. After the metal raw material is melted in the melter 10, it falls vertically from the center of the melter 10 to the upper surface of the high-speed rotating atomizing turntable plate 7. When it contacts the high-speed rotating atomizing turntable plate 7, it is immediately thrown away and falls into the discharge port 2 at one end of the cabin 1 along a pre-set trajectory; wherein the pre-set trajectory is parallel to the tangent direction of the atomizing turntable plate 7.

[0041] In the above embodiment, at least three rotators 3 cooperate with the atomizing turntable 6 to ensure that the atomizing turntable 6 will not fly out during high-speed rotation during assembly, thereby realizing high-speed rotation of the atomizing turntable 6 driven by the rotation of the rotator 3. In other words, the turntable is used to achieve secondary acceleration. Assuming that the radius of the turntable of the rotator 3 is R1, the radius of the turntable cone 8 is R2, and the radius of the atomizing turntable plate 7 is R3. In the working state, assuming that the rotator 3 is connected to a motor with an angular velocity of w, then the rotator turntable 5 and the turntable cone 8 maintain the same linear velocity, and the angular velocity of the atomizing turntable 6 driven by the rotator 3 is Since R1>R2, the rotation speed of the atomizing disk 6 will be magnified many times relative to the rotator disk 5.

[0042] The centrifugal atomization process is mainly affected by the centrifugal tangential linear velocity. The greater the linear velocity, the finer the particle size of the atomized powder. In the above embodiment, if the metal liquid column 11 falls to the edge of the atomizing turntable plate 7, the linear velocity obtained is The line speed is amplified twice to obtain a higher line speed.

[0043] The area where the metal liquid column 11 falls onto the atomizing turntable 6 becomes the atomizing area. When the metal liquid column 11 drops into the atomizing area, the metal liquid column 11 will expand into a small liquid film under the action of rotation. The edge of the liquid film will throw out small droplets under the centrifugal action. The small droplets will instantly obtain a close The linear velocity of the centrifugal acceleration is Under the action of the acceleration a, the droplets are thrown out of the atomization area and fly along the tangent direction of the high-speed rotating atomization turntable 6 toward the discharge port 2 at one end of the cabin 1. During this flight, the droplets solidify quickly to form solid powder particles, thereby completing the centrifugal atomization process of the metal powder.

[0044] refer to Figure 2-Figure 4 According to one embodiment of the present invention, the edges of the two rotator turntables 5 of each rotator 3 are respectively provided with first beveled surfaces 12 in opposite directions to each other; the edges of the two turntable cones 8 are respectively provided with second beveled surfaces 13 in opposite directions to the first beveled surfaces 12 of the corresponding rotator turntables 5; the assembly between the atomizing turntable 6 and at least three rotators 3 is achieved through the mutual cooperation between the corresponding second beveled surfaces 13 and the first beveled surfaces 12.

[0045] Specifically, refer to Figure 2 The edge of the rotator turntable 5 at the upper end of each rotator shaft 4 is provided with a first chamfered surface 12 inclined downward at a certain angle, and the edge of the rotator turntable 5 at the lower end of each rotator shaft 4 is provided with a first chamfered surface 12 inclined upward at a certain angle.

[0046] refer to Figure 3 The turntable cone 8 on the upper surface of the atomizing turntable 6 is provided with a second beveled surface 13 in the opposite direction to the first beveled surface 12 of the edge of the rotator turntable 5 at the upper end of the rotator shaft 4, and the angles are equal; the turntable cone 8 on the lower surface of the atomizing turntable 6 is provided with a second beveled surface 13 in the opposite direction to the first beveled surface 12 of the edge of the rotator turntable 5 at the lower end of the rotator shaft 4, and the angles are equal. The setting of the angles needs to ensure that the atomizing turntable 6 will not deviate when driven by the rotator 3 to rotate.

[0047] refer to Figure 4, the turntable truncated cone 8 is tangent to the edge of each rotator turntable 5, so that the atomizing turntable 6 is assembled between at least three rotators 3, wherein the atomizing turntable plate 7 is clamped between the upper and lower rotator turntables 5, thereby realizing the high-speed rotation of the atomizing turntable 6 driven by the rotator 3. Because under some conditions, the bearing force and high speed of the bearing are contradictory; therefore, the embodiment of the present invention uses a gear transmission-like method, and the angle between the turntable of the rotator 3 and the turntable truncated cone of the atomizing turntable is meshed to ensure the limit, so that the rotation of the atomizing turntable does not need to be limited by an additional bearing, and is free from the constraint of the bearing, and realizes extremely high-speed rotation.

[0048] According to one embodiment of the present invention, there are three rotators 3 .

[0049] The three rotators 3 stably clamp the atomizing turntable 6 in the middle, so that the atomizing turntable 6 rotates at a high speed as the rotators 3 rotate.

[0050] refer to Figure 5 According to one embodiment of the present invention, the radii of the rotator turntables 5 of the three rotators 3 are equal.

[0051] In the above embodiment, the radii of the rotator disks 5 of the three rotators 3 are equal, and the atomizing disk 6 is stably clamped in the middle by the turntable truncated table 8, and the radii of the upper and lower bottom surfaces of the turntable truncated table 8 are adjusted, and the position of the metal liquid column 11 dripping onto the atomizing disk 6 is adjusted, so that when the metal liquid column 11 is thrown away with the high-speed rotating atomizing disk 6, it is ensured that the rotator shaft 4 does not block it. The radii of the rotator disks 5 of the three rotators 3 are equal, which is conducive to processing and more economical.

[0052] refer to Figure 6 According to one embodiment of the present invention, the radii of the rotator disks 5 of two of the three rotators 3 are equal and smaller than the radius of the rotator disk 5 of the other rotator 3 .

[0053] In the above embodiments, for the convenience of description, the present invention refers to two rotators with equal radius as the first rotator and the second rotator, and the other rotator as the third rotator. Figure 6 In an embodiment of the present invention, the first rotator and the second rotator are respectively placed on both sides of the third rotator. Since the turntable radius of the first rotator and the second rotator is smaller than the turntable radius of the third rotator, the position where the metal liquid column falls to the atomizing turntable is as far away from the third rotator as possible, so that the contact point between the metal liquid column and the atomizing turntable is further outward. When the metal liquid column falls onto the atomizing turntable, the path track of the metal droplets being thrown away is smoother, thereby avoiding the influence of the rotator axis to a greater extent.

[0054] refer to Figure 7According to one embodiment of the present invention, the molten metal column 11 flowing out of the melter 10 falls to the edge of the upper surface of the atomizing turntable plate 7 .

[0055] In the above embodiment, the support rod 9 is arranged so that the molten metal column 11 flowing out of the melter 10 just falls to the edge of the upper surface of the atomizing turntable plate 7, so that the centrifugal acceleration obtained by the molten metal droplets is maximized and the centrifugal atomization effect is better.

[0056] refer to Figure 8 and Fig. 9 According to one embodiment of the present invention, the melter 10 includes a crucible 14 or a conical solenoid induction heater 15 .

[0057] In the above embodiment, the melter 10 is used to load the metal raw material to be atomized, so that the metal raw material is melted in the melter 10. Figure 8 The melter 10 may be a crucible 14, the lower end of the crucible 14 is a conical outlet, after the metal raw material is put into the crucible 14 and heated and melted, the metal liquid column 11 flows out along the conical outlet and drips onto the atomizing turntable 6. Fig. 9 The melter 10 can also be a conical solenoid induction heater 15; the metal raw material is a rod 151, the upper end of the rod 151 is fixed on a rod turntable 152, the upper end of the rod turntable 152 is connected to a rod shaft 153, and the rod shaft 153 is fixed to the side wall of the melter 10 through a bracket. The function of the rod shaft 153 is to drive the rod turntable 152 to rotate and move downward; the lower end of the rod 151 extends into the induction area of ​​the conical solenoid 155, and the rod 151 rotates and slowly moves downward under the drive of the rod shaft 153, and melts in the induction area of ​​the conical solenoid 155.

[0058] refer to Figure 1 According to one embodiment of the present invention, the feed port 2 is connected to a storage tank 16. The storage tank 16 is used to collect the metal powder after centrifugal atomization.

[0059] According to one embodiment of the present invention, a cooling device is further provided in the cabin 1 between the rotator 3 and the discharge port 2 .

[0060] In the above embodiment, the metal liquid column 11 falls onto the atomizing turntable 6, and in the process of flying toward the discharge port 2 at one end of the cabin 1 along the tangential direction of the high-speed rotating atomizing turntable 6, the droplets solidify rapidly to form solid powder particles; in order to accelerate the cooling and solidification of the droplets, the embodiment of the present invention is provided with a cooling device in the track of the droplets flying toward the discharge port 2, and the cooling device can be a jet or a fan.

[0061] It should be added that reference Figure 1The cabin of the metal powder atomization device provided in the embodiment of the present invention has a whistle-shaped shape, which significantly reduces the size of the metal powder atomization device compared to the circular shape of conventional centrifugal devices. Conventional centrifugal devices actually waste space because their atomization ejection direction is uniform in 360 degrees. The metal powder atomization device of the present invention, because it is a high-speed atomization centrifugation in the tangential direction, allows the atomization streamlines of the droplets to fly along a preset track. Therefore, it is sufficient to design the atomization chamber space of the track, which greatly saves the space of the atomization chamber and reduces the manufacturing and maintenance costs of the equipment.

[0062] In addition, the metal raw materials used in conventional metal powder atomization equipment are solid bars, and the shape of the bars is required to be a very high-precision cylindrical shape, so the raw material cost is very high. However, the raw materials used in this application are metal bar blanks, and the raw materials do not need to be processed, so the raw material cost is significantly reduced.

[0063] In order to more clearly illustrate the metal powder atomization device of the present invention, the conventional plasma rotating electrode atomization device is used as a control, and the yield of the metal powder atomization device of the present invention is described in detail through specific experimental results, as follows:

[0064] Comparative Example:

[0065] A conventional plasma rotating electrode atomization device is used to manufacture powders in the fine powder segment (<50 μm). A 75 mm diameter rod is used and the rotation speed is set to 15000 rpm to produce Ti6Al4V alloy powder. The particle size distribution obtained after sampling and screening is: <45 μm 0.49 wt.%, 45-53 μm 0.45 wt.%, 53-75 μm 2.77 wt.%, 75-106 μm 10.27 wt.%, 106-150 μm 31.34 wt.%, 150-180 μm 26.08 wt.%, >180 μm 28.61 wt.%.

[0066] By using the metal powder atomization equipment of the present invention, the rotation speed of the rotator shaft is also set to 15000 rpm, and the particle size distribution of the prepared powder is: <45μm 30.49wt.%, 45-53μm 19.84wt.%, 53-75μm 43.63wt.%, >75μm 6.04wt.%.

[0067] It can be seen from the above experiments that the yield of fine powder prepared by the metal powder atomization equipment provided by the present invention is significantly greater than that of the conventional plasma rotating electrode atomization equipment. The converted result is that the yield of the metal powder atomization equipment of the present invention for the subdivision of <50μm is about 30-40%, and compared with the conventional <10%, the fine powder yield of the present invention has been significantly improved. In addition, the present invention can further improve the fine powder yield by adjusting the rotation speed of the rotator shaft and the radius of the rotator turntable, turntable truncated cone and atomizing turntable plate, so that the yield of fine powder can reach 70-80%.

[0068] In summary, the metal powder atomization equipment of the present invention utilizes the principle of centrifugal atomization and uses a turntable to achieve secondary acceleration, so that the atomizing turntable plate can produce extremely high linear velocity and centrifugal acceleration, thereby making the centrifugal effect better, the obtained powder is finer, and the yield of fine powder is significantly improved, while reducing the cost of metal raw materials and the cost of equipment manufacturing and maintenance, and having better economy.

[0069] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A metal powder atomization device, characterized in that: include: Cabin; A feeding port is provided at one end of the bottom of the cabin, and at least three rotators are horizontally provided at the other end of the bottom of the cabin; Each of the rotators comprises a vertically arranged rotator shaft, on which two rotator turntables are arranged, and the rotator shaft passes through the center of each rotator turntable respectively; a gap is arranged between the two rotator turntables; The other end of the cabin is also provided with an atomizing turntable, and the atomizing turntable includes an atomizing turntable plate, and the centers of the upper surface and the lower surface of the atomizing turntable plate are symmetrically provided with turntable cones respectively; The atomizing turntable is assembled between the at least three rotators through the turntable truncated table, and the atomizing turntable plate is located at the gap between the two rotator turntables of each rotator; A support rod is also vertically arranged at the other end of the cabin, a melter is fixed at the upper end of the support rod, and the molten metal column flowing out of the melter falls to the upper surface of the atomizing turntable plate, and points to the discharge port along the tangent direction of the movement of the atomizing turntable; The cabin of the metal powder atomization equipment is in the shape of a whistle, and atomization centrifugation is performed at high speed along its tangent direction, so that the atomization streamlines of the droplets all fly along a preset track, thereby saving space in the atomization chamber; the preset track is parallel to the tangent direction of the atomization turntable plate; The edges of the two rotating disks of each rotating device are respectively provided with first chamfers in opposite directions; the edges of the two rotating disk truncated cones are respectively provided with second chamfers in opposite directions to the first chamfers of the corresponding rotating disks; and the assembly between the atomizing rotating disk and at least three rotating devices is achieved through the mutual cooperation of the corresponding second chamfers and the first chamfers; A cooling device is also provided in the cabin between the rotator and the discharge port.

2. The metal powder atomization equipment according to claim 1, characterized in that: There are three rotators.

3. The metal powder atomization equipment according to claim 2, characterized in that: The radii of the rotator turntables of the three rotators are equal.

4. The metal powder atomization equipment according to claim 2, characterized in that: The radii of the rotator disks of two of the rotators are equal and smaller than the radius of the rotator disk of the other rotator.

5. The metal powder atomization equipment according to claim 1, characterized in that: The molten metal column flowing out of the melter falls to the edge of the upper surface of the atomizing turntable plate.

6. The metal powder atomization equipment according to claim 1, characterized in that: The melter contains a crucible or a conical solenoid induction heater.

7. The metal powder atomization equipment according to claim 1, characterized in that: The feed discharge port is connected with a storage tank.

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