Device for preparing high-entropy alloy coating through laser cladding

Abstract

The invention provides a device for preparing a high-entropy alloy coating through laser cladding, the device 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 on the outer side of the laser cladding nozzle. Adjustment is carried out according to the storage amount of cladding alloy powder in the storage disc, it is ensured that a proper amount of powder can be provided for the laser cladding process at any time, the cladding efficiency is improved, coaxial powder feeding can be achieved by connecting the conveying pipe with an inner cavity of the laser cladding nozzle, and the cladding alloy powder can be directly fed into a molten pool in the direction of a laser beam; due to the fact that the powder flow and the laser beam are coaxial, deviation of the powder caused by gravity or airflow in the flying process is reduced, the risk of uneven coating components is reduced, efficient utilization and even distribution of the powder are guaranteed, the segregation phenomenon is reduced, and forming of the high-quality coating is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser cladding, and particularly relates to a device for preparing high-entropy alloy coating by laser cladding. BACKGROUND

[0002] With the increasing demand for material performance in modern industry, traditional alloys have been difficult to meet the application requirements in some extreme environments. As a new type of metal material, high-entropy alloy (HEA) has a broad application prospect in the fields of aerospace, automobile, energy, chemical industry and the like due to its unique alloy design concept and excellent comprehensive performance, such as high strength, high hardness, good wear resistance, heat resistance and corrosion resistance. However, the traditional methods for preparing high-entropy alloy, such as vacuum melting method and powder metallurgy method, often have problems of complex process and high cost, which limit its wide application in industry. In order to overcome these problems, researchers begin to explore more efficient and economical surface coating technology in order to endow the base material with the superior properties of high-entropy alloy without significantly increasing the cost.

[0003] As an advanced surface treatment method, laser cladding has been widely concerned and developed in recent years. It uses a high-energy-density laser beam to melt the cladding material and the thin layer on the surface of the base material, and rapidly solidifies to form an alloy layer with special performance. Compared with other surface strengthening technologies, laser cladding has the advantages of fast heating speed, fast cooling rate, small heat-affected zone, low dilution rate and metallurgical bonding, and is very suitable for preparing high-entropy alloy coating.

[0004] However, the traditional laser cladding system still has certain limitations in the feeding mechanism. For example, the device for preparing laser cladding coating disclosed in the publication CN217104072U includes a feeding assembly, a laser assembly, a driving assembly, a protection box and a protection gas assembly. The feeding pipe of the feeding assembly is used to deliver the cladding powder to the surface of the workpiece, the laser head of the laser assembly is used to cladding the cladding powder on the surface of the workpiece, the driving assembly is used to drive the feeding pipe and the laser head to move synchronously, the protection box is provided with a containing cavity and an opening communicating with the containing cavity, the feeding pipe and the laser head can pass through the opening and extend into the containing cavity, and the workpiece is arranged in the containing cavity. The powder delivery and laser cladding are separate work, and the powder is easy to be scattered by airflow, which directly affects the quality of the final coating and the production efficiency.

[0005] Therefore, it is necessary to provide a new device for preparing high-entropy alloy coating by laser cladding to solve the above technical problems. SUMMARY

[0006] To solve the above technical problems, the present application provides a device for preparing high-entropy alloy coating by laser cladding.

[0007] The device for preparing high-entropy alloy coating by laser cladding 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 feeding assembly comprises a storage disc, a rotating ring and a plurality of feeding pipes, the storage disc is fixedly installed outside the laser cladding nozzle, the bottom of the storage disc is circumferentially and equidistantly connected with a plurality of discharge pipes, the rotating ring is rotatably installed outside the laser cladding nozzle, the top of the rotating ring is integrally connected with a liftable push plate mechanism, the tail end of the push plate mechanism is arranged inside the storage disc, a sliding groove for the movement of the push plate mechanism is formed in the top of the storage disc, a driving mechanism for driving the rotation of the rotating ring is arranged outside the laser cladding nozzle, the bottom ends of the plurality of feeding pipes pass through the laser cladding nozzle and are connected with the inner cavity of the laser cladding nozzle, and the top ends of the plurality of feeding pipes correspond to the positions of the bottom ends of the plurality of discharge pipes. The outer surface of the rotating ring is further provided with a limiting baffle, when the limiting baffle is rotated to the position between the feeding pipe and the discharge pipe, the inner cavities at the opposite ends of the feeding pipe and the discharge pipe are blocked by the limiting baffle.

[0008] Further, the push plate mechanism comprises a plurality of sliding plates integrally connected with the top of the rotating ring, a movable push rod is slidably installed in each of the plurality of sliding plates, the tail end of the movable push rod passes through the sliding groove and is attached to the bottom wall of the inner cavity of the storage disc, the plurality of movable push rods are fixedly connected through a connecting ring, one of the sliding plates is threadedly connected with an adjusting rod, and the remaining sliding plates are slidably connected with guide rods; The adjusting rod is rotatably installed on one of the sliding plates, and the plurality of guide rods are fixedly installed on the remaining sliding plates.

[0009] Further, the driving mechanism comprises a mounting seat, a driving motor, a gear and a gear ring, the mounting seat is fixedly installed on the outer surface of the laser cladding nozzle, the driving motor is fixedly installed on the top end of the mounting seat, the output end of the driving motor is fixedly connected with the gear, the gear ring is fixedly installed on the outer surface of the rotating ring, and the gear ring is engaged with the gear.

[0010] Further, the laser assembly comprises a multi-axis robot arm, a connecting frame, a sleeve and a laser, the connecting frame is fixedly installed on the output end of the multi-axis robot arm, the sleeve is fixedly connected with the connecting frame, the bottom of the sleeve is integrally connected with the laser cladding nozzle, a laser beam channel passing through the laser cladding nozzle is arranged in the sleeve along the central axis direction of the sleeve, and the laser is fixedly installed in the sleeve.

[0011] Further, the laser output end, the laser beam channel and the output end of the laser cladding nozzle are collinear.

[0012] Further, the top end of the storage pipe has a larger diameter than the bottom end of the discharge pipe.

[0013] Further, the outer surface of the limiting baffle is covered with a flexible soft pad.

[0014] Further, the outer side of the material conveying pipe is also obliquely inserted with a blowing pipe, the outer surface of the blowing pipe is in sealing connection with the outer surface of the material conveying pipe.

[0015] Further, one of the sliding plates is also provided with a power motor, and the output end of the power motor is fixedly connected with one end of the adjusting rod.

[0016] Further, the bottom end of the movable push rod is obliquely arranged upwards.

[0017] Further, the outer side of the material conveying pipe is also obliquely inserted with a blowing pipe, the outer surface of the blowing pipe is in sealing connection with the outer surface of the material conveying pipe, the outer surface of the rotating ring is also provided with a limiting baffle two, a gas supply pipe is arranged beside the multi-axis robot arm, the gas supply pipe is fixed at the bottom of the conveying disc, the end of the gas supply pipe is opposite to the blowing pipe, and when the limiting baffle two rotates to the position between the gas supply pipe and the blowing pipe, the inner cavities at the opposite ends of the gas supply pipe and the blowing pipe are blocked by the limiting baffle two.

[0018] Compared with the related art, the device for preparing high-entropy alloy coating by laser cladding has the following beneficial effects: 1、The device for preparing high-entropy alloy coating by laser cladding has the following beneficial effects:

[0019] 2、The device for preparing high-entropy alloy coating by laser cladding has the following beneficial effects:

[0020] 3、The device for laser cladding preparation of high-entropy alloy coating provided by the application can not only accelerate the speed of powder delivery to the laser cladding nozzle, but also effectively avoid the adsorption of cladding alloy powder on the inner wall of the feeding pipe, thereby reducing resource waste and maintaining the cleanliness and efficiency of the system. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A preferred embodiment structure diagram of the device for laser cladding preparation of high-entropy alloy coating provided by the application; Figure 2 A cross-sectional structure diagram of the laser cladding nozzle provided by the application Figure 1 ; Figure 3 A cross-sectional structure diagram of the laser cladding nozzle provided by the application Figure 2 ; Figure 4 A structure diagram of the feeding assembly provided by the application; Figure 5 A preferred embodiment structure diagram of the device for laser cladding preparation of high-entropy alloy coating provided by the application; Figure 6 A preferred embodiment structure diagram of the device for laser cladding preparation of high-entropy alloy coating provided by the application.

[0022] Reference signs in the drawings: 1, laser cladding nozzle; 2, storage tray; 3, rotating ring; 4, feeding pipe; 5, discharge pipe; 6, sliding groove; 7, limiting baffle; 8, sliding plate; 9, movable push rod; 10, adjusting rod; 11, guide rod; 12, mounting seat; 13, driving motor; 14, gear; 15, gear ring; 16, multi-axis robot arm; 17, connecting frame; 18, envelope; 19, laser; 20, laser beam channel; 21, blowing pipe; 22, power motor; 23, limiting baffle two; 24, gas supply pipe; 25, main pipeline; 26, connecting ring. DETAILED DESCRIPTION

[0023] The application will be further described below in combination with the drawings and embodiments.

[0024] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 , among which, Figure 1 A preferred embodiment structure diagram of the device for laser cladding preparation of high-entropy alloy coating provided by the application; Figure 2 A cross-sectional structure diagram of the laser cladding nozzle provided by the application Figure 1 ; Figure 3 A cross-sectional structure diagram of the laser cladding nozzle provided by the applicationFigure 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.

[0025] 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.

[0026] 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

[0027] In the specific implementation process, such as Figures 1-4 As 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. 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 is formed in the top of the storage tray 2 for movement of the push plate mechanism. A driving mechanism is arranged outside the laser cladding nozzle 1 for driving the rotating ring 3 to rotate. The bottom ends of the plurality of feeding pipes 4 pass through the laser cladding nozzle 1 and are connected with the inner cavity of the laser cladding nozzle 1. 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. It should be noted that the diameter of the top end of the storage pipe 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 the high-entropy alloy powder has different particle size distributions, the larger inlet can ensure that even the powder with larger particles can smoothly enter, avoiding interruption of the conveying caused by particle jamming. Referring to Figure 2 As shown, the outer surface of the rotating ring 3 is further provided with a limiting baffle 7. When the limiting baffle 7 is rotated to 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. In this embodiment, the outer surface of the limiting baffle 7 is covered with a flexible soft pad. When the flexible soft pad contacts the pipe openings of the feeding pipe 4 and the discharge pipe 5, it will be extruded and deformed. The elastic parts inside the pipe openings of the feeding pipe 4 and the discharge pipe 5 will block the pipe openings. At this time, the cladding alloy powder will not be discharged.

[0028] In a specific implementation process, referring to Figure 3 and Figure 4 As shown, the push plate mechanism comprises a plurality of sliding plates 8 integrally connected with the top of the rotating ring 3. The plurality of sliding plates 8 are slidably installed with movable push rods 9 inside. The tail end of the movable push rod 9 passes through the sliding groove 6 and is attached to the bottom wall of the inner cavity of the storage tray 2. The plurality of movable push rods 9 are fixedly connected through a connecting ring 26. One of the sliding plates 8 is threadedly connected with an adjusting rod 10. The remaining sliding plates 8 are slidably connected with guide rods 11. The bottom end of the movable push rod 9 is upwardly and obliquely arranged. The adjusting rod 10 is rotatably installed on one of the sliding plates 8, a plurality of guide rods 11 are fixedly installed on the remaining sliding plates 8, one of the sliding plates 8 is further provided with a power motor 22, the output end of the power motor 22 is fixedly connected with one end of the adjusting rod 10, the power motor 22 is started to drive the adjusting rod 10 to rotate, the adjusting rod 10 is in threaded connection with the sliding plate 8, at this time, the plurality of sliding plates 8 are synchronously slid in the plurality of sliding plates 8, and the height position of the movable push rod 9 in the inner cavity of the storage disc 2 is adjusted, the storage disc 2 can be adjusted according to the storage amount of the cladding alloy powder in the storage disc 2, when the movable push rod 9 is attached to the bottom wall of the inner cavity of the storage disc 2, the rotating ring 3 is reversed, the cladding alloy powder is scraped to the discharge pipe 5 through the inclined surface at the bottom of the movable push rod 9, and when the rotating ring 3 is forward rotated, the cladding alloy powder is flattened through the back surface close to the bottom of the movable push rod 9, the flattening operation can effectively reduce the problem of excessive local pressure caused by uneven distribution of the powder in the conveying process, thereby reducing the wear degree of each component of the conveying system and prolonging the service life of the equipment, when the powder enters the laser cladding area in a more uniform state, a more flat and uniform coating structure can be formed, which is beneficial to the formation of high-entropy alloy coating.

[0029] In a specific implementation process, referring to Figure 4 , the driving mechanism includes 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 at 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, the driving motor 13 is started to drive the gear 14 to rotate, and the gear 14 synchronously drives the gear ring 15 and the rotating ring 3 to rotate on the outer surface of the laser assembly.

[0030] In a specific implementation process, referring to Figure 1 , Figure 2 and Figure 3 , the laser assembly includes 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, a laser beam channel 20 penetrating through the laser cladding nozzle 1 is arranged in the envelope 18 along the central axis direction, and the laser 19 is fixedly installed in the envelope 18, the multi-axis robot arm 16 can drive the laser 19 and the laser cladding nozzle 1 to perform multi-angle cladding on the workpiece; 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, and the laser beam emitted by the laser 19 melts the powder on the surface of the workpiece to form a high-entropy alloy coating when the laser beam irradiates the surface of the cladding alloy powder. Example two

[0031] In a specific implementation process, referring to Figure 5 , the same structure as example one is followed, and the difference from example one is that the outer side of the feeding pipe 4 is also obliquely inserted with a blowing pipe 21, the outer surface of the blowing pipe 21 is provided with a valve, the outer surface of the blowing pipe 21 is sealingly connected with the outer surface of the feeding pipe 4, a plurality of blowing pipes 21 are jointly connected with a main pipe 25, the main pipe 25 is in communication with an external gas source, the gas source can be a gas pump, and the gas can accelerate the delivery efficiency of the cladding powder in the blowing pipe 21 to the laser cladding nozzle 1, and on the other hand, it can prevent the cladding alloy powder from being adsorbed on the inner wall of the feeding pipe 4, thereby preventing resource waste; It should be noted that when no cladding operation is performed, compressed air or other inert gases (such as nitrogen or argon) can be introduced into the feeding pipe 4 through the blowing pipe 21 to clean the residual powder in the pipe, ensure that the pipe is unobstructed for next use, and also use the blowing pipe 21 to introduce cooling gas to reduce the temperature around the cladding area, which helps to reduce the size of the heat affected zone and control the solidification speed of the molten pool, thereby improving the quality of the coating. Example three

[0032] In a specific implementation process, referring to Figure 6 , the same structure as example one and example two is followed, and the difference from example two is that the outer side of the feeding pipe 4 is also obliquely inserted with a blowing pipe 21, 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 also provided with a limiting baffle two 23, a gas supply pipe 24 is also provided beside the multi-axis machine arm 16, the gas supply pipe 24 is connected with a gas source, and the gas supply pipe 24 is fixed at the bottom of the feeding tray, the end of the gas supply pipe 24 is opposite to the blowing pipe 21, and when the limiting baffle two 23 is rotated to be 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.

[0033] In this embodiment, the feeding assembly has three modes as follows: 1. Blowing state, the driving motor 13 is started to drive the gear 14 to rotate, and the gear 14 synchronously drives the gear ring 15 and the rotating ring 3, the rotating ring 3 rotates to move the limiting baffle two 23 to between the feeding pipe 4 and the discharging pipe 5, the inner cavities at the opposite ends of the feeding pipe 4 and the discharging pipe 5 are blocked by the limiting baffle two 23, and the limiting baffle one 7 is away from the feeding pipe 4 and the discharging pipe 5, at this time, the gas supply pipe 24 and the blowing pipe 21 are opened, and the gas supply pipe 24 is supplied with gas by the gas source; 2. Powder outlet state, by starting the driving motor 13 to drive the gear 14 to rotate, 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 one 7 to the air supply pipe 24 and the air blowing pipe 21, the inner cavity of the air supply pipe 24 and the air blowing pipe 21 at the opposite end is blocked by the limiting baffle one 7, and the limiting baffle two 23 is away from the air supply pipe 24 and the air blowing pipe 21, at this time, the feeding pipe 4 and the discharge pipe 5 are opened, the cladding powder is scraped to pass through the discharge pipe 5 and the feeding pipe 4 into the laser cladding nozzle 1; 3. Closed state, by starting the driving motor 13 to drive the gear 14 to rotate, 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 one 7 to the feeding pipe 4 and the discharge pipe 5, and the limiting baffle two 23 moves to the air supply pipe 24 and the air blowing pipe 21, both are in a closed state, neither feeding nor air supply.

[0034] Compared with the second embodiment, the use mode is different, and the valve structure is reduced, the existence of the limiting baffle two 23 can block the connection between the air supply pipe 24 and the air blowing pipe 21 when air supply is not needed, and safety hidden dangers caused by unnecessary gas leakage or misoperation are avoided, through accurate control of the air blowing amount, fine adjustment of powder fluidity can be realized, so that the operator can flexibly adjust the process parameters according to actual needs, and the best cladding effect is achieved.

[0035] The circuit and control involved in the application are prior art, and will not be described in detail here.

[0036] The basic principles and main features of the application and the advantages of the application are shown and described above, and it is obvious for those skilled in the art that the application is not limited to the details of the above exemplary embodiments, and the application can be realized in other specific forms without departing from the spirit or basic characteristics of the application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the application, and any reference signs in the claims should not be regarded as limiting the claims.

[0037] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the specification is described in this way only for the sake of clarity, those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

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 bottom wall of the inner cavity 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 storage pipe is larger than the pipe diameter of the bottom end of the discharge 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 material conveying 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 material conveying pipe (4).

10. The apparatus for laser cladding preparation of high-entropy alloy coating according to claim 8, wherein, The outer side of the material conveying 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 material conveying 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 conveying disc, 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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