An apparatus for preparing high-entropy alloy coating by laser cladding

Abstract

The application provides a device for preparing high-entropy alloy coating by laser cladding, which comprises a laser assembly, a laser cladding nozzle and a feeding assembly, the output end of the laser assembly is located at the top of the laser cladding nozzle, and the feeding assembly is arranged outside the laser cladding nozzle, the application can realize accurate control of the supply amount of cladding alloy powder, the supply amount of cladding alloy powder is adjusted according to the storage amount of the cladding alloy powder in the storage tray, and the application can ensure that the laser cladding process can be provided with appropriate powder at any time, improve the cladding efficiency, the feeding pipe is connected with the inner cavity of the laser cladding nozzle, coaxial powder feeding can be realized, the cladding alloy powder can be directly sent into the molten pool along the direction of the laser beam, due to the coaxiality of the powder flow and the laser beam, the deviation of the powder in the flight process caused by gravity or air flow is reduced, the risk of uneven coating composition is reduced, the efficient utilization and uniform distribution of the powder are ensured, the segregation phenomenon is reduced, and the high-quality coating can be formed.

Description

Technical Field

[0001] This invention relates to the field of laser cladding technology, and more particularly to an apparatus for preparing high-entropy alloy coatings by laser cladding. Background Technology

[0002] With the increasing demands of modern industry on material performance, traditional alloys are no longer sufficient to meet the application requirements in some extreme environments. High entropy alloys (HEAs), as a new type of metallic material, have shown broad application prospects in aerospace, automotive, energy, chemical and other fields due to their unique alloy design concept and excellent comprehensive properties, such as high strength, high hardness, good wear resistance, heat resistance and corrosion resistance. However, traditional methods for preparing high entropy alloys, such as vacuum melting and powder metallurgy, often have problems such as complex processes and high costs, which limit their widespread industrial application. In order to overcome these problems, researchers have begun to explore more efficient and economical surface coating technologies, hoping to endow the base material with the superior properties of high entropy alloys without significantly increasing costs.

[0003] Laser cladding technology, as an advanced surface treatment method, has received widespread attention and development in recent years. It uses a high-energy-density laser beam to melt the cladding material and a thin layer on the surface of the substrate, and then rapidly solidifies to form an alloy layer with special properties. Compared with other surface strengthening technologies, laser cladding has advantages such as fast heating speed, fast cooling rate, small heat-affected zone, low dilution rate, and the ability to achieve metallurgical bonding, making it very suitable for preparing high-entropy alloy coatings.

[0004] Nevertheless, traditional laser cladding systems still have certain limitations in their feeding mechanisms. For example, CN217104072U discloses a laser cladding coating preparation device, which includes a feeding component, a laser component, a driving component, a protective box, and a protective gas component. The feeding component's feeding tube is used to convey cladding powder to the workpiece surface, the laser head of the laser component is used to clad the cladding powder onto the workpiece surface, the driving component is used to drive the feeding tube and the laser head to move synchronously, and the protective box has a receiving cavity and an opening connected to the receiving cavity. Both the feeding tube and the laser head can pass through the opening and extend into the receiving cavity. The workpiece is placed in the receiving cavity. Powder conveying and laser cladding are separate operations, and the powder is easily dispersed by airflow, which directly affects the quality of the final coating and production efficiency.

[0005] Therefore, it is necessary to provide a new apparatus for laser cladding to prepare high-entropy alloy coatings to solve the above-mentioned technical problems. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention provides an apparatus for preparing high-entropy alloy coatings by laser cladding.

[0007] The apparatus for preparing high-entropy alloy coatings by laser cladding provided by the present invention includes a laser component, a laser cladding nozzle, and a feeding component. The output end of the laser component is located at the top of the laser cladding nozzle, and the feeding component is placed outside the laser cladding nozzle.

[0008] The feeding assembly includes a storage tray, a rotating ring, and multiple feeding pipes. The storage tray is fixedly installed on the outside of the laser cladding nozzle. Multiple discharge pipes are circumferentially and equidistantly connected to the bottom of the storage tray. The rotating ring is rotatably installed on the outside of the laser cladding nozzle. A liftable push plate mechanism is integrally connected to the top of the rotating ring. The end of the push plate mechanism is placed inside the storage tray. A sliding groove for the push plate mechanism to move is opened on the top of the storage tray. A drive mechanism for driving the rotating ring to rotate is provided on the outside of the laser cladding nozzle. The bottom ends of the multiple feeding pipes pass through the laser cladding nozzle and are connected to its inner cavity. The top ends of the multiple feeding pipes correspond to the bottom ends of the multiple discharge pipes.

[0009] The outer surface of the rotating ring is also provided with a limiting baffle. When the limiting baffle rotates between the conveying pipe and the discharge pipe, the inner cavity at the opposite end of the conveying pipe and the discharge pipe is blocked by the limiting baffle.

[0010] Furthermore, the push plate mechanism includes multiple sliding plates integrally connected to the top of the rotating ring. Each of the multiple sliding plates has a movable push rod slidably installed inside. The end of the movable push rod passes through the sliding groove and fits against the bottom wall of the inner cavity of the storage tray. The multiple movable push rods are fixedly connected to each other by a connecting ring. One of the sliding plates is threadedly connected to an adjusting rod, and the other sliding plates are slidably connected to guide rods.

[0011] The adjusting rod is rotatably mounted on one of the sliding plates, and the plurality of guide rods are respectively fixedly mounted on the remaining sliding plates.

[0012] Furthermore, the driving mechanism includes a mounting base, a drive motor, a gear, and a gear ring. The mounting base is fixedly mounted on the outer surface of the laser cladding nozzle, the drive motor is fixedly mounted on the top of the mounting base, the output end of the drive motor is fixedly connected to the gear, and the gear ring is fixedly mounted on the outer surface of the rotating ring, and the gear ring meshes with the gear.

[0013] Furthermore, the laser assembly includes a multi-axis robotic arm, a connecting frame, a cover, and a laser. The connecting frame is fixedly installed at the output end of the multi-axis robotic arm. The cover is fixedly connected to the connecting frame, and the bottom of the cover is integrally connected to the laser cladding nozzle. The cover has a laser beam channel that communicates with the laser cladding nozzle along its central axis. The laser is fixedly installed inside the cover.

[0014] Furthermore, the laser output end, the laser beam channel, and the output end of the laser cladding nozzle are collinear.

[0015] Furthermore, the diameter of the top end of the conveying pipe is larger than the diameter of the bottom end of the discharge pipe.

[0016] Furthermore, the outer surface layer of the limiting baffle is covered with a flexible pad.

[0017] Furthermore, an air blowing pipe is also inserted obliquely into the outer side of the conveying pipe, and the outer surface of the air blowing pipe is sealed to the outer surface of the conveying pipe.

[0018] Furthermore, one of the sliding plates is also equipped with a power motor, the output end of which is fixedly connected to one end of the adjusting rod.

[0019] Furthermore, the bottom end of the movable push rod is inclined upwards.

[0020] Furthermore, an air blowing pipe is also inserted obliquely into the outer side of the conveying pipe, and the outer surface of the air blowing pipe is sealed to the outer surface of the conveying pipe. The outer surface of the rotating ring is also provided with a limiting baffle. An air supply pipe is also provided next to the multi-axis robotic arm, and the air supply pipe is fixed to the bottom of the storage tray. The end of the air supply pipe is directly opposite the air blowing pipe. When the limiting baffle rotates to between the air supply pipe and the air blowing pipe, the inner cavity at the opposite end of the air supply pipe and the air blowing pipe is blocked by the limiting baffle.

[0021] Compared with related technologies, the apparatus for laser cladding preparation of high-entropy alloy coatings provided by the present invention has the following beneficial effects:

[0022] 1. This invention, through the design of a rotating ring and a pusher plate mechanism, has a limiting baffle on the outer surface of the rotating ring. When the limiting baffle rotates between the feeding pipe and the discharge pipe, the inner cavity at the opposite end of the feeding pipe and the discharge pipe is blocked by the limiting baffle, which can achieve precise control of the supply of cladding alloy powder. The pusher plate mechanism can be adjusted according to the amount of cladding alloy powder stored in the storage tray to ensure that an appropriate amount of powder can be provided to the laser cladding process at any time, thereby improving the cladding efficiency.

[0023] 2. In this invention, the feed pipe is connected to the inner cavity of the laser cladding nozzle, which enables coaxial powder feeding. The cladding alloy powder can be directly fed into the molten pool along the direction of the laser beam. Since the powder flow is coaxial with the laser beam, the deviation of the powder due to gravity or airflow during flight is reduced, thereby reducing the risk of uneven coating composition, ensuring efficient utilization and uniform distribution of powder, reducing segregation, and helping to form a high-quality coating.

[0024] 3. The addition of an air blowing pipe in this invention not only accelerates the speed at which powder is delivered to the laser cladding nozzle, but also effectively prevents the cladding alloy powder from adsorbing onto the inner wall of the feeding pipe, thereby reducing resource waste and maintaining the cleanliness and efficiency of the system. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a preferred embodiment of the apparatus for laser cladding to prepare high-entropy alloy coatings provided by the present invention;

[0026] Figure 2 Schematic cross-sectional view of the laser cladding nozzle provided by the present invention Figure 1 ;

[0027] Figure 3 Schematic cross-sectional view of the laser cladding nozzle provided by the present invention Figure 2 ;

[0028] Figure 4 This is a schematic diagram of the structure of the feeding assembly provided by the present invention;

[0029] Figure 5 This is a schematic diagram of the second embodiment of the apparatus for laser cladding to prepare high-entropy alloy coatings provided by the present invention;

[0030] Figure 6 This is a schematic diagram of the third embodiment of the apparatus for preparing high-entropy alloy coatings by laser cladding provided by the present invention.

[0031] Labels in the diagram: 1. Laser cladding nozzle; 2. Storage tray; 3. Rotating ring; 4. Conveying pipe; 5. Discharge pipe; 6. Sliding groove; 7. Restricting baffle; 8. Sliding plate; 9. Movable push rod; 10. Adjusting rod; 11. Guide rod; 12. Mounting base; 13. Drive motor; 14. Gear; 15. Gear ring; 16. Multi-axis robotic arm; 17. Connecting frame; 18. Enclosure; 19. Laser; 20. Laser beam channel; 21. Air blowing pipe; 22. Power motor; 23. Restricting baffle two; 24. Air supply pipe; 25. Main pipe; 26. Connecting ring. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0033] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 as well as Figure 6 ,in, Figure 1 This is a schematic diagram of a preferred embodiment of the apparatus for laser cladding to prepare high-entropy alloy coatings provided by the present invention; Figure 2 Schematic cross-sectional view of the laser cladding nozzle provided by the present invention Figure 1 ; Figure 3 Schematic cross-sectional view of the laser cladding nozzle provided by the present invention Figure 2 ; Figure 4 This is a schematic diagram of the structure of the feeding assembly provided by the present invention; Figure 5 This is a schematic diagram of the second embodiment of the apparatus for laser cladding to prepare high-entropy alloy coatings provided by the present invention; Figure 6 This is a schematic diagram of the third embodiment of the apparatus for preparing high-entropy alloy coatings by laser cladding provided by the present invention.

[0034] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. In addition, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. Example 1

[0036] In the specific implementation process, such as Figures 1-4As shown, the apparatus for preparing high-entropy alloy coatings by laser cladding includes a laser component, a laser cladding nozzle 1, and a feeding component. The output end of the laser component is located at the top of the laser cladding nozzle 1, and the feeding component is placed outside the laser cladding nozzle 1.

[0037] The feeding assembly includes a storage tray 2, a rotating ring 3, and multiple feeding pipes 4. The storage tray 2 is fixedly installed on the outside of the laser cladding nozzle 1. Multiple discharge pipes 5 are circumferentially and equidistantly connected to the bottom of the storage tray 2. The rotating ring 3 is rotatably installed on the outside of the laser cladding nozzle 1. A liftable push plate mechanism is integrally connected to the top of the rotating ring 3. The end of the push plate mechanism is placed inside the storage tray 2. A sliding groove 6 for the push plate mechanism to move is opened on the top of the storage tray 2. A drive mechanism for driving the rotating ring 3 to rotate is provided on the outside of the laser cladding nozzle 1. The bottom ends of the multiple feeding pipes 4 pass through the laser cladding nozzle 1 and are connected to its inner cavity. The top ends of the multiple feeding pipes 4 correspond to the bottom ends of the multiple discharge pipes 5.

[0038] It should be noted that the diameter of the top end of the conveying pipe 4 is larger than the diameter of the bottom end of the discharge pipe 5. The larger diameter of the top end of the storage pipe helps to reduce the risk of powder blockage. Since high-entropy alloy powder has different particle size distribution, a larger inlet can ensure that even larger particles of powder can enter smoothly, avoiding conveying interruptions caused by particles getting stuck.

[0039] refer to Figure 2 As shown, the outer surface of the rotating ring 3 is also provided with a limiting baffle 7. When the limiting baffle 7 rotates to between the conveying pipe 4 and the discharge pipe 5, the inner cavity at the opposite end of the conveying pipe 4 and the discharge pipe 5 is blocked by the limiting baffle 7.

[0040] In this embodiment, the outer surface of the limiting baffle 7 is covered with a flexible pad. When the flexible pad comes into contact with the openings of the conveying pipe 4 and the discharge pipe 5, it will be squeezed and deformed. The elastic part located inside the openings of the conveying pipe 4 and the discharge pipe 5 will block the openings. At this time, the cladding alloy powder will not be discharged.

[0041] In a specific implementation process, refer to Figure 3 as well as Figure 4 As shown, the push plate mechanism includes multiple sliding plates 8 integrally connected to the top of the rotating ring 3. Movable push rods 9 are slidably installed inside each of the multiple sliding plates 8. The ends of the movable push rods 9 pass through the sliding groove 6 and fit against the bottom wall of the inner cavity of the storage tray 2. The multiple movable push rods 9 are fixedly connected to each other by a connecting ring 26. An adjusting rod 10 is threadedly connected to one of the sliding plates 8, and guide rods 11 are slidably connected to the other sliding plates 8. The bottom end of the movable push rod 9 is inclined upward.

[0042] An adjusting rod 10 is rotatably mounted on one of the sliding plates 8, and multiple guide rods 11 are fixedly mounted on the remaining sliding plates 8. One of the sliding plates 8 is also equipped with a power motor 22, the output end of which is fixedly connected to one end of the adjusting rod 10. Starting the power motor 22 drives the adjusting rod 10 to rotate, and the adjusting rod 10 is threadedly connected to the sliding plates 8. This causes the multiple sliding plates 8 to slide synchronously within their respective inner sides, and the height of the movable push rod 9 within the storage tray 2 is adjusted accordingly. This adjustment can be made based on the amount of cladding alloy powder stored in the storage tray 2. When the inner wall of the storage tray 2 is in contact with the material, the rotating ring 3 rotates in reverse, and the inclined surface at the bottom of the movable push rod 9 scrapes the cladding alloy powder toward the discharge pipe 5. When the rotating ring 3 rotates in the forward direction, the back surface near the bottom of the movable push rod 9 smooths the cladding alloy powder. Through the smoothing operation, the problem of excessive local pressure caused by uneven distribution of powder during the conveying process can be effectively reduced, thereby reducing the wear on various components of the conveying system and extending the service life of the equipment. When the powder enters the laser cladding area in a more uniform state, a smoother and more uniform coating structure can be formed, which is conducive to the formation of high-entropy alloy coating.

[0043] In a specific implementation process, refer to Figure 4 As shown, the drive mechanism includes a mounting base 12, a drive motor 13, a gear 14, and a gear ring 15. The mounting base 12 is fixedly mounted on the outer surface of the laser cladding nozzle 1. The drive motor 13 is fixedly mounted on the top of the mounting base 12. The output end of the drive motor 13 is fixedly connected to the gear 14. The gear ring 15 is fixedly mounted on the outer surface of the rotating ring 3, and the gear ring 15 meshes with the gear 14. By starting the drive motor 13, the gear 14 is driven to rotate, and the gear 14 will synchronously drive the gear ring 15 and the rotating ring 3 to rotate on the outer surface of the laser component.

[0044] In a specific implementation process, refer to Figure 1 , Figure 2 as well as Figure 3 As shown, the laser assembly includes a multi-axis robotic arm 16, a connecting frame 17, a cover 18, and a laser 19. The connecting frame 17 is fixedly installed at the output end of the multi-axis robotic arm 16. The cover 18 is fixedly connected to the connecting frame 17, and the bottom of the cover 18 is integrally connected to the laser cladding nozzle 1. A laser beam channel 20 communicating with the laser cladding nozzle 1 is provided inside the cover 18 along its central axis. The laser 19 is fixedly installed inside the cover 18. The multi-axis robotic arm 16 can drive the laser 19 and the laser cladding nozzle 1 to perform multi-angle cladding on the workpiece.

[0045] It should be noted that the output end of the laser 19, the laser beam channel 20, and the output end of the laser cladding nozzle 1 are collinear. The laser beam emitted by the laser 19 irradiates the surface of the cladding alloy powder, thereby molten powder is clad onto the surface of the workpiece to form a high-entropy alloy coating. Example 2

[0046] In a specific implementation process, refer to Figure 5 As shown, following the same structure as Embodiment 1, the difference from Embodiment 1 is that an air blowing pipe 21 is also inserted obliquely into the outside of the material conveying pipe 4. The outer surface of the air blowing pipe 21 is provided with a valve, and the outer surface of the air blowing pipe 21 is sealed to the outer surface of the material conveying pipe 4. Multiple air blowing pipes 21 are connected to a main pipe 25. The main pipe 25 is connected to an external air supply source, which can be an air pump. The gas can accelerate the conveying efficiency of the cladding powder in the air blowing pipe 21 to the laser cladding nozzle 1. On the other hand, it can prevent the cladding alloy powder from adsorbing on the inner wall of the material conveying pipe 4, which would lead to resource waste.

[0047] It should be noted that when not performing cladding operations, compressed air or other inert gases (such as nitrogen or argon) can be introduced into the feed pipe 4 through the air blowing pipe 21 to clean the residual powder in the pipe and ensure that the pipe is unobstructed for the next use. Cooling gas can also be introduced through the air blowing pipe 21 to reduce the temperature around the cladding area, which helps to reduce the size of the heat-affected zone and helps to control the solidification rate of the molten pool, thereby improving the quality of the coating. Example 3

[0048] In a specific implementation process, refer to Figure 6 As shown, following the same structure as Embodiment 1 and Embodiment 2, the difference from Embodiment 2 is that an air blowing pipe 21 is also inserted obliquely into the outer side of the conveying pipe 4. The outer surface of the air blowing pipe 21 is sealed to the outer surface of the conveying pipe 4. The outer surface of the rotating ring 3 is also provided with a limiting baffle 23. An air supply pipe 24 is also provided next to the multi-axis robot arm 16. The air supply pipe 24 is connected to the air supply source and is fixed to the bottom of the storage tray 2. The end of the air supply pipe 24 is directly opposite the air blowing pipe 21. When the limiting baffle 23 rotates to the space between the air supply pipe 24 and the air blowing pipe 21, the inner cavity at the opposite end of the air supply pipe 24 and the air blowing pipe 21 is blocked by the limiting baffle 23.

[0049] In this embodiment, the feeding assembly has three modes as follows:

[0050] 1. In the blowing state, the drive motor 13 is started to drive the gear 14 to rotate, and the gear 14 will drive the gear ring 15 and the rotating ring 3 simultaneously. The rotating ring 3 rotates to move the limiting baffle 23 between the conveying pipe 4 and the discharge pipe 5. The inner cavity at the opposite end of the conveying pipe 4 and the discharge pipe 5 is blocked by the limiting baffle 23, while the limiting baffle 7 moves away from the conveying pipe 4 and the discharge pipe 5. At this time, the air supply pipe 24 and the blowing pipe 21 are opened, and air is supplied through the air supply source.

[0051] 2. In the powder dispensing state, the drive motor 13 is started to drive the gear 14 to rotate, and the gear 14 will synchronously drive the gear ring 15 and the rotating ring 3. The rotating ring 3 rotates to move the limiting baffle 1 7 between the air supply pipe 24 and the air blowing pipe 21. The inner cavity at the opposite end of the air supply pipe 24 and the air blowing pipe 21 is blocked by the limiting baffle 1 7, while the limiting baffle 23 moves away from the air supply pipe 24 and the air blowing pipe 21. At this time, the material conveying pipe 4 and the discharge pipe 5 are opened, and the cladding powder is scraped to pass through the discharge pipe 5 and the material conveying pipe 4 into the laser cladding nozzle 1.

[0052] 3. In the closed state, the drive motor 13 is started to drive the gear 14 to rotate, and the gear 14 will drive the gear ring 15 and the rotating ring 3 in sync. The rotating ring 3 rotates to move the limiting baffle 1 7 between the material conveying pipe 4 and the material discharge pipe 5, and the limiting baffle 23 between the air supply pipe 24 and the air blowing pipe 21. Both are in a closed state, and neither material nor air is supplied.

[0053] This method of use differs from Embodiment 2. Compared to Embodiment 2, it reduces the valve structure. The presence of the limiting baffle 23 can block the connection between the air supply pipe 24 and the air blowing pipe 21 when air supply is not required, avoiding unnecessary gas leakage or safety hazards caused by misoperation. Through precise control of the blowing volume, fine adjustment of powder flowability can be achieved, allowing the operator to flexibly adjust the process parameters according to actual needs to achieve the best cladding effect.

[0054] The circuits and controls involved in this invention are all existing technologies and will not be described in detail here.

[0055] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or basic characteristics. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of the invention is defined by the appended claims rather than the foregoing description. Therefore, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0056] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An apparatus for laser cladding to prepare high-entropy alloy coating, characterized in that, The application relates to a laser cladding nozzle (1) and a feeding assembly, wherein the output end of a laser assembly is located at the top of the laser cladding nozzle (1), and the feeding assembly is arranged outside the laser cladding nozzle (1). The feeding assembly comprises a storage tray (2), a rotating ring (3) and a plurality of feeding pipes (4), the storage tray (2) is fixedly installed outside the laser cladding nozzle (1), the bottom of the storage tray (2) is circumferentially and equidistantly connected with a plurality of discharge pipes (5), the rotating ring (3) is rotatably installed outside the laser cladding nozzle (1), the top of the rotating ring (3) is integrally connected with a liftable push plate mechanism, the tail end of the push plate mechanism is arranged inside the storage tray (2), a sliding groove (6) for the movement of the push plate mechanism is formed in the top of the storage tray (2), a driving mechanism for driving the rotation of the rotating ring (3) is arranged outside the laser cladding nozzle (1), the bottom ends of the plurality of feeding pipes (4) penetrate through the laser cladding nozzle (1) and are connected with the inner cavity of the laser cladding nozzle (1), and the top ends of the plurality of feeding pipes (4) correspond to the positions of the bottom ends of the plurality of discharge pipes (5). The outer surface of the rotating ring (3) is further provided with a limiting baffle (7), when the limiting baffle (7) is rotated to the position between the feeding pipe (4) and the discharge pipe (5), the inner cavities at the opposite ends of the feeding pipe (4) and the discharge pipe (5) are blocked by the limiting baffle (7). 2.The device for preparing high-entropy alloy coating by laser cladding according to claim 1, characterized in that, The push plate mechanism comprises a plurality of sliding direction plates (8) integrally connected with the top of the rotating ring (3), the inner cavities of the plurality of sliding direction plates (8) are slidably installed with movable push rods (9), the tail ends of the movable push rods (9) penetrate through the sliding groove (6) and are attached to the inner cavity bottom wall of the storage tray (2), the bottom end of the movable push rod (9) is upwardly and obliquely arranged, the plurality of movable push rods (9) are fixedly connected through a connecting ring (26), one of the sliding direction plates (8) is threadedly connected with an adjusting rod (10), and the rest of the sliding direction plates (8) are slidably connected with guide rods (11). The adjusting rod (10) is rotatably installed on one of the sliding direction plates (8), and the plurality of guide rods (11) are fixedly installed on the rest of the sliding direction plates (8). 3.The device for preparing high-entropy alloy coating by laser cladding according to claim 2, characterized in that, The driving mechanism comprises a mounting seat (12), a driving motor (13), a gear (14) and a gear ring (15), the mounting seat (12) is fixedly installed on the outer surface of the laser cladding nozzle (1), the driving motor (13) is fixedly installed on the top end of the mounting seat (12), the output end of the driving motor (13) is fixedly connected with the gear (14), the gear ring (15) is fixedly installed on the outer surface of the rotating ring (3), and the gear ring (15) is engaged with the gear (14).

4. The device for preparing high-entropy alloy coating by laser cladding according to claim 3, characterized in that, The laser assembly comprises a multi-axis robot arm (16), a connecting frame (17), an envelope (18) and a laser (19), the connecting frame (17) is fixedly installed at the output end of the multi-axis robot arm (16), the envelope (18) is fixedly connected with the connecting frame (17), the bottom of the envelope (18) is integrally connected with the laser cladding nozzle (1), and the envelope (18) is provided with a laser beam channel (20) penetrating through the laser cladding nozzle (1) along the central axis direction of the envelope (18), and the laser (19) is fixedly installed inside the envelope (18). 5.The device for preparing high-entropy alloy coating by laser cladding according to claim 4, characterized in that, The output end of the laser (19), the laser beam channel (20) and the output end of the laser cladding nozzle (1) are collinear. 6.The device for preparing high-entropy alloy coating by laser cladding according to claim 5, characterized in that, The pipe diameter of the top end of the feeding pipe (4) is larger than that of the bottom end of the discharging pipe (5).

7. The apparatus for laser cladding preparation of high-entropy alloy coating according to claim 6, characterized in that, The outer surface of the limiting baffle (7) is covered with a flexible soft pad. 8.The device for preparing high-entropy alloy coating by laser cladding according to claim 7, characterized in that, One of the sliding plates (8) is further provided with a power motor (22), and the output end of the power motor (22) is fixedly connected with one end of the adjusting rod (10). 9.The device for preparing high-entropy alloy coating by laser cladding according to claim 8, characterized in that, The outer side of the feeding pipe (4) is further obliquely inserted with a blowing pipe (21), and the outer surface of the blowing pipe (21) is sealingly connected with the outer surface of the feeding pipe (4).

10. The apparatus for laser cladding preparation of high-entropy alloy coating according to claim 8, wherein, The outer side of the feeding pipe (4) is further obliquely inserted with a blowing pipe (21), and the outer surface of the blowing pipe (21) is sealingly connected with the outer surface of the feeding pipe (4), the outer surface of the rotating ring (3) is further provided with a limiting baffle two (23), a gas supply pipe (24) is further provided beside the multi-axis robot arm (16), and the gas supply pipe (24) is fixed at the bottom of the material storage disc (2), the end of the gas supply pipe (24) is opposite to the blowing pipe (21), and when the limiting baffle two (23) rotates to the position between the gas supply pipe (24) and the blowing pipe (21), the inner cavities at the opposite ends of the gas supply pipe (24) and the blowing pipe (21) are blocked by the limiting baffle two (23).

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