A friction stir additive manufacturing device and method for high entropy alloy particle reinforced aluminum-based composite materials

Abstract

The present invention belongs to the technical field of stir friction solid-phase deposition additive manufacturing, and specifically relates to a stir friction additive manufacturing device and method for high-entropy alloy particle-reinforced aluminum-based composite materials. It comprises an extrusion deposition system and a continuous feeding system, the extrusion deposition system comprising an extrusion screw and a rotating shaft shoulder; the continuous feeding system comprising a raw material box, an induction heater and a feeding roller; the feeding pipe of the continuous feeding system is connected to the extrusion screw of the extrusion deposition system. The device can realize continuous feeding of raw materials of different particle sizes and efficient and rapid solid-phase additive manufacturing. The additive process does not require a protective atmosphere and can be operated in an atmospheric environment. It has the advantages of strong raw material adaptability, high additive efficiency, and low manufacturing and maintenance costs. The method deposits the hot-plasticized mixed raw materials onto the surface of a substrate to form a deposition layer by heating and plasticizing and continuous extrusion, and simultaneously stirs and friction the deposition layer to achieve rapid preparation of a high-entropy alloy particle-reinforced aluminum-based composite material additive body.

Description

Technical Field

[0001] The present invention belongs to the technical field of friction stir solid phase deposition additive manufacturing, and specifically relates to a friction stir additive manufacturing device and method for high entropy alloy particle reinforced aluminum-based composite materials. Background Art

[0002] Aluminum-based composites have advantages such as low density, high specific strength, and good thermal conductivity, and are widely used in fields such as aerospace and rail transportation. High-entropy alloys, as multi-principal alloys, are composed of five or more main elements, with the atomic percentage of each main element ranging from 5at% to 35at%. Due to their high configurational entropy, high-entropy alloys easily form simple solid solutions such as FCC and BCC, and have advantages such as high strength, high wear resistance, and high toughness. The difference in thermal expansion coefficient between high-entropy alloys and the metal matrix is ​​relatively small, and the high-entropy alloys have good metal-metal interfacial bonding ability between the reinforcing particles and the aluminum matrix, forming a stable and reliable interface. Due to the effects of various strengthening mechanisms such as grain refinement and dislocation strengthening, the strength and plasticity of the composite material can be simultaneously improved.

[0003] Powder metallurgy is a common method for preparing aluminum-based composites. This involves using metal powder, or a combination of metal powder and non-metal powder, as raw materials and producing various products through a process of mixing, pressing, and sintering at high temperatures. This long production cycle, combined with the complex manufacturing process and high manufacturing costs, results from the pressing and sintering of the mixed raw materials.

[0004] Additive manufacturing technology features short manufacturing cycles, high material utilization, and personalized design. Traditional metal additive manufacturing utilizes a high-energy beam to heat the metal raw material, causing it to rapidly melt, solidify, and deposit layer by layer. The main issues with traditional high-energy beam additive manufacturing are the formation of solidification defects such as pores, thermal cracks, and alloy element segregation during the solidification process, which affect the overall mechanical properties of the additive material. Furthermore, the high-energy beam micro-area forming method results in low manufacturing efficiency, stringent requirements for the powder raw material, and high manufacturing costs.

[0005] Friction stir solid-phase additive manufacturing (SSM) is based on the principle of friction stir welding. It uses consumable metal rods, wires, powders, and granular debris. The high-speed rotation generates frictional heat and plastic deformation heat to plasticize the material. Finally, the plasticized material is rapidly deposited layer by layer onto a substrate. This technology effectively avoids the melting and solidification defects of traditional high-energy beam additive manufacturing (HEBM) and improves the overall mechanical properties of the additive body.

[0006] In summary, if a device and method can be developed to realize the additive manufacturing of high-entropy alloy particle-reinforced aluminum-based composite materials using stir friction solid-phase additive manufacturing technology, an aluminum-based composite additive body with excellent comprehensive mechanical properties will be obtained, which will have important application value in the fields of aerospace, automobile lightweighting, etc. Summary of the Invention

[0007] The present invention provides a friction stir additive manufacturing device and method for high entropy alloy particle reinforced aluminum-based composite materials, so as to solve the technical problems existing in the prior art of complex preparation process and long preparation cycle of traditional high entropy alloy particle reinforced aluminum-based composite materials.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] A stir friction additive manufacturing device for high-entropy alloy particle-reinforced aluminum-based composite materials includes an extrusion deposition system and a continuous feeding system. The extrusion deposition system includes an extrusion screw and a rotating shoulder, and the rotating shoulder is arranged at the lower end of the extrusion screw; the continuous feeding system includes a raw material box, an induction heater and a feeding roller, the induction heater is installed at the bottom of the raw material box, and the feeding roller is installed at the outlet of the raw material box; the feeding pipe of the continuous feeding system is connected to the extrusion screw of the extrusion deposition system.

[0010] The induction heater heats the aluminum alloy raw material to 30%-90% of its solidus line. A vibrator is also installed on the side of the raw material box, and the vibration frequency of the vibrator is 50-100Hz.

[0011] A feeding pipe is connected to the outlet of the raw material box. The feeding roller is installed with a clearance fit between the upper part of the feeding pipe. A fixed spacing of 0.6-0.9 times the maximum particle diameter is left between the surface of the feeding roller and the lower surface of the inner part of the feeding pipe. The surface of the feeding roller has a corrugated groove with a depth of 0.5-1mm.

[0012] The feed roller is provided with a feed motor, which drives the feed roller to rotate, and the speed of the feed roller is 50-600 rpm.

[0013] A rotating base is installed at the upper end of the extrusion deposition system. The rotating base is fixed with a screw base by bolts. The extrusion screw is connected to the lower end of the screw base by bolts. The rotating base drives the screw base to rotate, and then drives the extrusion screw to rotate at high speed. The speed of the extrusion screw is 100-1600rpm.

[0014] The extrusion screw is a two-section screw consisting of a parallel section and a tapered section, wherein the length of the tapered screw accounts for 50% of the total length of the extrusion screw.

[0015] The parallel section of the extrusion screw is equipped with a screw shell, and the outer wall of the screw shell is provided with a horizontal feed port.

[0016] The bottom of the screw housing is fixed with a shoulder housing by bolts, a tapered roller bearing is provided on the shoulder housing, the rotating shoulder and the inner ring of the tapered roller bearing are connected to each other, the screw housing, the rotating shoulder and the extrusion screw form an extrusion cavity, and the horizontal feed port of the screw housing is connected to the upper part of the extrusion cavity.

[0017] The rotating shoulder is connected to the transmission wheel at the lower end of the shoulder motor through a transmission belt. The shoulder motor drives the rotating shoulder to rotate at high speed. The rotating shoulder speed is 100-400rpm. The bottom of the rotating shoulder has symmetrically shaped protrusions. The height of the protrusions can be selected from 1 to 3 mm according to the thickness of the additive layer.

[0018] A method for manufacturing a friction stir additive manufacturing device for high entropy alloy particle reinforced aluminum-based composite materials, comprising the following steps:

[0019] Step 1: The ball-milled high-entropy alloy powder and aluminum alloy particles are placed in a raw material box in a certain proportion to achieve initial uniform densification in the raw material box. The induction heater at the bottom of the raw material box then preheats the mixed raw materials.

[0020] Step 2: The preheated mixed raw materials are continuously extruded by the feed rollers, and then uniformly densified for the second time and transported to the cavity of the extrusion screw;

[0021] Step 3: The mixed raw materials are strongly sheared and extruded in the extrusion screw during the screw rotation, causing thermal plasticization and completing the third uniform densification. Subsequently, under the action of the axial feed force of the extrusion screw, the thermally plasticized mixed metal fluid adheres to the surface of the substrate to form a deposition layer;

[0022] Step 4: The rotating shoulder rotates at high speed to stir and rub the deposited layer on the substrate, causing severe plastic deformation, achieving the fourth uniform densification, and finally obtaining a high-entropy alloy particle-reinforced aluminum-based composite material additive body.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention discloses a stir friction additive manufacturing device for high-entropy alloy particle-reinforced aluminum-based composites. The device integrates an extrusion deposition system and a continuous feeding system, integrating multiple processes into a single device, reducing intermediate links and simplifying the overall process flow. Through the automated feeding, heating, extrusion and deposition processes, manual operations are reduced and production efficiency is improved. The continuous feeding system can continuously feed the raw materials into the extrusion screw, avoiding intermittent operation and greatly improving production efficiency. The induction heater can quickly and evenly heat the raw materials, ensuring that the raw materials reach the ideal temperature before entering the extrusion screw, thereby improving the thermal plasticization efficiency. The high-speed rotation of the rotating shoulder and the extrusion screw strongly shears and stirs the raw materials, promoting uniform mixing of the high-entropy alloy particles and the aluminum alloy matrix, and improving the performance consistency of the composite material. The entire device is designed as a continuous processing mode, achieving seamless connection from raw material feeding to final molding, greatly shortening the preparation cycle. The high-speed rotation of the rotating shoulder and the stirring friction effect accelerate the solidification process of the material, further shortening the preparation time. This stir friction additive manufacturing device for high-entropy alloy particle-reinforced aluminum-based composites not only simplifies the process flow and improves production efficiency through integrated, automated and optimized design, but also significantly improves the performance and quality of the material and shortens the preparation cycle.

[0025] Furthermore, the induction heater can precisely control the heating temperature of the mixed raw materials, which helps to uniformly plasticize the materials and improve their density and mechanical properties. At the same time, the combination of the vibrator and the raw material box can further promote uniform mixing and densification of the raw materials, reducing internal defects.

[0026] Furthermore, the corrugated grooves on the surface of the feed roller can prevent large particles of mixed raw materials from passing through, thereby ensuring a continuous and stable feeding process.

[0027] Furthermore, the feed motor is combined with the feed roller, and the speed of the feed roller is adjusted by the feed motor, which can accurately control the feed speed of the raw material and ensure the stability and consistency of the entire manufacturing process.

[0028] Furthermore, the high-speed rotating extrusion screw can strongly shear and stir the mixed raw materials, promoting uniform mixing and thermal plasticization of the materials.

[0029] Furthermore, the two-stage design of the extrusion screw can better control the flow and pressure distribution of the material, and improve the uniformity and density of the material.

[0030] Furthermore, the design of the horizontal feed port of the screw housing being connected to the extrusion cavity formed by the extrusion screw facilitates the continuous input of raw materials, simplifies the feeding process, and improves the operational convenience of the system.

[0031] Furthermore, through bolt fixation and bearing support, the structural stability and reliability of the entire system are ensured, extending the service life of the equipment.

[0032] Furthermore, the high-speed rotation and convex point design of the rotating shoulder can effectively stir the deposited layer, further improving the density and uniformity of the material.

[0033] Furthermore, the present invention discloses a method for manufacturing a friction stir additive manufacturing apparatus for high-entropy alloy particle-reinforced aluminum-based composites. Through multiple uniform densification processes (initial uniform densification, secondary uniform densification, tertiary uniform densification, and quaternary uniform densification), the material's density and mechanical properties are significantly improved. The entire manufacturing process is highly integrated and automated, reducing manual intervention, process complexity, and production cycle time. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 : Schematic diagram of the structure of the friction stir additive manufacturing device for high entropy alloy particle reinforced aluminum-based composite materials of the present invention;

[0035] Figure 2 : Schematic diagram of the shape and position of the convex point at the bottom of the rotating shoulder of the present invention;

[0036] Figure 3 : Cross-sectional view of the friction stir additive manufacturing device for high entropy alloy particle reinforced aluminum-based composite materials of the present invention.

[0037] Explanation of the numbers: 1. Stationary base; 2. Rotating base; 3. Screw base; 4. Extrusion screw; 5. Base housing; 6. Shoulder motor mounting bracket; 7. Shoulder motor; 8. Drive belt; 9. Drive wheel; 10. Rotating shoulder; 11. Tapered roller bearing; 12. Shoulder housing; 13. Screw housing; 14. Feed pipe; 15. Induction heater; 16. Feed roller; 17. Vibrator; 18. Raw material box; 19. Mounting bracket; 20. Feed motor; 101. Extrusion deposition system; 102. Continuous feeding system; 201. Bump. DETAILED DESCRIPTION

[0038] In order to further understand the content of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the embodiments are only for explaining the present invention and are not intended to limit it.

[0039] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0040] See also Figure 1 、 Figure 2 and Figure 3A stir friction additive manufacturing device for high entropy alloy particle reinforced aluminum matrix composite material, comprising a continuous feeding system 102 and an extrusion deposition system 101; the continuous feeding system 102 comprises a raw material box 18, a vibrator 17, an induction heater 15, a mounting frame 19, a feeding roller 16, a feeding motor 20 and a feeding pipe 14; the extrusion deposition system 101 comprises a stationary base 1, a rotating base 2, a screw base 3, an extrusion screw 4, a base housing 5, a shoulder motor mounting frame 6, a shoulder motor 7, a transmission belt 8, a transmission wheel 9, a rotating Shoulder 10, tapered roller bearing 11, shoulder housing 12 and screw housing 13; in the continuous feeding system 102, the raw material box 18 is fixedly connected to the stationary base 1 through the mounting frame 19, and a vibrator 17 is installed on the side of the raw material box 18; a feed roller 16 is installed on the mounting frame 19, and the feed roller 16 is directly driven by the feeding motor 20. The feed roller 16 is installed with a clearance fit with the upper part of the feed tube 14, and a fixed distance is left between the outer surface of the feed roller 16 and the inner lower surface of the feed tube 14. An induction heater 15 is installed at the bottom of the raw material box 18. In the extrusion deposition system 101, a rotating base is installed at the upper end of the extrusion deposition system. The rotating base is first fixed with a screw base by bolts. The extrusion screw is connected to the lower end of the screw base by bolts. The base shell 5 is fixedly connected to the stationary base 1; a screw shell 13 is installed at the bottom of the base shell 5. The screw shell 13 is located in the parallel section of the extrusion screw 4. The screw shell 13, the rotating shaft shoulder 10 and the extrusion screw 4 form an extrusion cavity. The feed port provided in the screw shell 13 is connected to the upper part of the extrusion cavity; a shaft shoulder shell 12 is installed at the bottom of the screw shell 13, and a pair of tapered roller shafts are provided on the shaft shoulder shell 12 The mounting groove of the tapered roller bearing 11 is fixedly connected to the mounting groove, the rotating shoulder 10 is connected to the inner ring of the tapered roller bearing 11, and the rotating shoulder 10 can rotate around the tapered roller bearing 11; the shoulder motor 7 is fixedly connected to the base shell 5 through the shoulder motor mounting bracket 6, and the rotating shoulder 10 can be rotated by the transmission wheel 9 and the transmission belt 8. The bottom of the rotating shoulder 10 has a symmetrically shaped protrusion 201. When the rotating shoulder 10 rotates, the protrusion 201 stirs and rubs the additive body formed by the metal solid fluid adhered to the surface of the substrate of the machine tool through the rotational motion.

[0041] A friction stir additive manufacturing device and method for high entropy alloy particle reinforced aluminum-based composite materials, the specific implementation method of which is as follows:

[0042] After the extrusion deposition system 101 and the continuous feeding system 102 are powered on, the feed motor 20 and the shoulder motor 7 are both activated. The high-entropy alloy and aluminum alloy metal particles and debris, previously placed in the raw material bin 18, are transported to the bottom of the bin 18 by gravity and the action of the vibrator 17. The vibrator 17 provides preliminary mixing of the loose metal particles and debris, improving conveying efficiency. An induction heater 15, located at the bottom of the bin 18, preheats the mixed raw materials. The mixed raw materials after preheating treatment are subjected to secondary densification under the action of extrusion and conveying by the feed roller 16; the feed motor 20 drives the feed roller 16 to rotate, and the feed roller 16 is installed with a gap between the feed tube 14 at its lower end. A fixed spacing of 0.6-0.9 times the maximum particle diameter is left between the surface of the feed roller 16 and the lower surface of the inner part of the feed tube 14. The spacing size can be adjusted according to the particle size. The feed roller 16 rotates along the feed tube 14 to extrude the mixed raw materials to complete the secondary densification. Among them, the surface of the feed roller 16 has a corrugated groove with a depth of 0.5-1mm, which helps to increase the friction between the feed roller 16 and the mixed raw materials and improve the conveying efficiency.

[0043] Then it is continuously transported to the feeding pipe 14, which is connected to the feed port of the screw housing 13. An extrusion cavity is formed between the screw housing 13, the rotating shaft shoulder 10 and the extrusion screw 4. The feed port of the screw housing 13 is connected to the extrusion cavity. After the secondary densification, the mixed raw materials are finally transported to the extrusion cavity formed by the screw housing 13 and the extrusion screw 4 through the feed port on the screw housing 13, thereby realizing efficient and continuous transportation of the raw materials.

[0044] The friction stir additive manufacturing device is connected to a machine tool. When the machine tool is in operation, it drives the rotating base 2 to rotate. The screw base 3 is bolted to the rotating base 2. The extrusion screw 4 is fixedly connected to the screw base 3 by the action of a jackscrew. As the rotating base 2 rotates, the screw base 3 drives the extrusion screw 4 to rotate at high speed. The extrusion screw 4 consists of a two-section screw consisting of parallel sections and a conical section. The conical section of the screw accounts for 50% of the length of the extrusion screw 4. The secondary densified mixed raw material delivered to the extrusion cavity is gradually transported from the parallel section of the extrusion screw 4 to the bottom of the conical section under the action of the high-speed rotation of the extrusion screw 4. The speed of the extrusion screw 4 ranges from 100 to 1600 rpm. During the rotation of the extrusion screw 4, the mixed raw material is subjected to intense shear and extrusion, causing thermal plasticization and completing the third densification. Subsequently, the axial feed force of the extrusion screw 4 causes the thermally plasticized metal solid fluid to adhere to the surface of the machine tool base.

[0045] The shoulder motor 7 drives the transmission wheel 9 at its lower end to rotate. One end of the transmission wheel 9 is connected to the rotating shoulder 10 at the lower end of the extrusion screw 4 through the transmission belt 8. The transmission wheel 9 drives the rotating shoulder 10 to rotate at high speed through the transmission belt 8. The speed range of the rotating shoulder 10 is: 100-400rpm; the bottom of the rotating shoulder 10 is provided with a plurality of evenly and symmetrically arranged protrusions 201. The bottom surface of the rotating shoulder 10 and the protrusions 201 on the bottom surface stir and rub the additive body on the substrate, causing severe plastic deformation, thereby achieving the fourth densification.

[0046] At this point, the metal remains in a solid state, unmelted, and free of melting and solidification defects. After four densification steps, discrete metal particles, debris, and other raw materials can be continuously fed into high-quality solid-phase additive manufacturing, resulting in excellent additive performance.

[0047] The present invention is described in detail below with reference to specific embodiments.

[0048] Example 1

[0049] The CoCrFeNi high entropy alloy particles are selected as the reinforcement phase and the particle size distribution of the high entropy alloy particles is obtained by sieving with a standard mesh size of 30-50 , the matrix is ​​selected as 6061 aluminum alloy with a particle size range of 1-3 mm, and high entropy alloy particles with a volume fraction of 5% and 6061 aluminum alloy particles are placed in the raw material box 18; the vibrator frequency is selected to be 60 Hz, and the induction heater temperature is set to 250 ° C;

[0050] The depth of the corrugated grooves on the surface of the feed roller 16 is 0.6 mm, and the clearance between the surface of the feed roller 16 and the lower surface of the inner surface of the feed tube 14 is 1.8 mm. The rotation speed of the feed roller 16 is set to 250 rpm. Under the continuous extrusion action, the mixed raw materials are continuously extruded into the feed tube 14 and finally transported to the extrusion cavity;

[0051] The extrusion screw rotates counterclockwise at a speed of 600 rpm. Under the rotation of the extrusion screw 4, the raw material delivered to the extrusion cavity is gradually transported from the parallel section of the extrusion screw 4 to the bottom end of the conical section. Subsequently, under the action of the axial feed force of the extrusion screw 4, the thermoplasticized metal solid fluid adheres to the surface of the substrate to form a deposition layer.

[0052] Driven by the shoulder motor 7, the rotating shoulder 10 rotates clockwise at a speed of 200 rpm. The bottom surface of the rotating shoulder 10 and the 1 mm height protrusion 201 on the bottom surface stir and rub the additive body on the substrate, causing severe plastic deformation, thereby refining the microstructure of the additive body and uniformly densifying it, and finally obtaining a high-entropy alloy particle-reinforced aluminum-based composite material additive body.

[0053] This example successfully fabricated a 3mm-thick, high-entropy alloy particle-reinforced aluminum-based composite material. The additive process was conducted without melting or solidification defects. The material exhibited a tensile strength of 273 MPa and an elongation of 19%. The material exhibited a dense internal structure, with uniform distribution of the high-entropy alloy particles in the reinforcement phase, as shown in Table 1.

[0054] Table 1

[0055]

[0056] Example 2

[0057] The CoCrFeNi high entropy alloy particles are selected as the reinforcement phase and the particle size distribution of the high entropy alloy particles is obtained by sieving with a standard mesh size of 50-70 The matrix is ​​a 6061 aluminum alloy with a particle size range of 2-4 mm. High entropy alloy particles with a volume fraction of 10% and 6061 aluminum alloy particles are placed in a raw material box 18. The vibrator frequency is selected to be 80 Hz, and the induction heater temperature is set to 350°C.

[0058] The corrugated grooves on the surface of the feed roller 16 have a depth of 1 mm, and the clearance between the surface of the feed roller 16 and the lower surface of the feed tube 14 is 2.5 mm. The rotation speed of the feed roller 16 is set to 200 rpm. Under the continuous extrusion action, the mixed raw materials are continuously extruded into the feed tube 14 and finally transported to the extrusion cavity.

[0059] The extrusion screw rotates counterclockwise, and the speed is set to 1000 rpm. Under the rotation of the extrusion screw 4, the raw material delivered to the extrusion cavity is gradually transported from the parallel section of the extrusion screw 4 to the bottom end of the conical section. Then, under the action of the axial feed force of the extrusion screw 4, the thermoplasticized metal solid fluid adheres to the surface of the substrate to form a deposition layer.

[0060] Driven by the shoulder motor 7, the rotating shoulder 10 rotates clockwise at a speed of 250 rpm. The bottom surface of the rotating shoulder 10 and the 2 mm height protrusions 201 on the bottom surface stir and rub the additive body on the substrate, causing severe plastic deformation, thereby refining the microstructure of the additive body and uniformly densifying it, and finally obtaining a high-entropy alloy particle-reinforced aluminum-based composite material additive body.

[0061] This example successfully produced a 5mm-thick high-entropy alloy particle-reinforced aluminum-based composite material. The additive process did not cause melting, and there were no melting and solidification defects. The material exhibited a tensile strength of 258 MPa and an elongation of 22%. The material exhibited a dense internal structure, with uniform distribution of the high-entropy alloy particles in the reinforcement phase. This method enables high-quality solid-phase additive manufacturing of high-entropy alloy particle-reinforced aluminum-based composites using continuous feeding, as shown in Table 2 below.

[0062] Table 2

[0063]

[0064] In addition, it should be understood that although this specification describes the embodiments, not every embodiment contains only one independent technical solution. This description is for clarity only. Those skilled in the art should consider the specification as a whole. 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. The above content is only for the purpose of illustrating the technical concept of the present invention and cannot be used to limit the scope of protection of the present invention. Any changes made based on the technical solution in accordance with the technical concept proposed by the present invention fall within the scope of protection of the claims of the present invention.

Claims

1. A friction stir additive manufacturing device for high entropy alloy particle reinforced aluminum matrix composite material, characterized in that: The invention comprises an extrusion deposition system (101) and a continuous feeding system (102), wherein the extrusion deposition system (101) comprises an extrusion screw (4) and a rotating shaft shoulder (10), wherein the rotating shaft shoulder (10) is arranged at the lower end of the extrusion screw (4); the continuous feeding system (102) comprises a raw material box (18), an induction heater (15) and a feeding roller (16), wherein the induction heater (15) is installed at the bottom of the raw material box (18), and the feeding roller (16) is installed at the outlet of the raw material box (18); the feeding pipe (14) of the continuous feeding system (102) is connected to the extrusion screw (4) of the extrusion deposition system (101), the outlet of the raw material box (18) is connected to the feeding pipe (14), the feeding roller (16) is installed with a clearance fit with the upper part of the feeding pipe (14), the surface of the feeding roller (16) and the lower surface of the inner part of the feeding pipe (14) are spaced a fixed distance apart, and the feeding roller (16) is installed with a clearance fit between the upper part of the feeding pipe (14), and the surface of the feeding roller (16) and the lower surface of the inner part of the feeding pipe (14) are spaced a fixed distance apart. (16) The surface has grooves; the upper end of the extrusion deposition system (101) is installed with a rotating base (2), the rotating base (2) is first fixed with a screw base (3) by bolts, the extrusion screw (4) is connected to the lower end of the screw base (3) by bolts, the extrusion screw (4) is installed with a screw housing (13), the outer wall of the screw housing (13) is provided with a horizontal feed port, the bottom of the screw housing (13) is fixed with a shaft shoulder housing (12) by bolts, a tapered roller bearing (11) is provided on the shaft shoulder housing (12), the rotating shaft shoulder (10) and the inner ring of the tapered roller bearing (11) are connected to each other, the bottom of the rotating shaft shoulder (10) has a symmetrical shaped protrusion (201), the screw housing (13), the rotating shaft shoulder (10) and the extrusion screw (4) form an extrusion cavity, and the horizontal feed port of the screw housing (13) is connected to the upper part of the extrusion cavity.

2. The friction stir additive manufacturing device for high entropy alloy particle reinforced aluminum-based composite materials according to claim 1, characterized in that: The induction heater (15) heats the aluminum alloy raw material to 30%-90% of its solidus line. A vibrator (17) is also installed on the side of the raw material box (18). The vibration frequency of the vibrator (17) is 50-100 Hz.

3. A friction stir additive manufacturing device for high entropy alloy particle reinforced aluminum matrix composite material according to claim 1, characterized in that: The fixed distance between the surface of the feeding roller (16) and the inner lower surface of the feeding tube (14) is 0.6-0.9 times the maximum particle diameter, and the groove on the surface of the feeding roller (16) is a corrugated groove with a depth of 0.5-1 mm.

4. A friction stir additive manufacturing device for high entropy alloy particle reinforced aluminum matrix composite material according to claim 3, characterized in that: The feeding roller (16) is provided with a feeding motor (20), and the feeding motor (20) drives the feeding roller (16) to rotate. The rotation speed of the feeding roller (16) is 50-600 rpm.

5. The friction stir additive manufacturing device for high entropy alloy particle reinforced aluminum-based composite materials according to claim 1, characterized in that: The rotating base (2) drives the screw base (3) to rotate, thereby driving the extrusion screw (4) to perform high-speed rotation. The rotation speed of the extrusion screw (4) is 100-1600 rpm.

6. The friction stir additive manufacturing device for high entropy alloy particle reinforced aluminum-based composite materials according to claim 5, characterized in that: The extrusion screw (4) is a two-section screw consisting of a parallel section and a conical section, wherein the length of the conical screw accounts for 50% of the total length of the extrusion screw (4).

7. The friction stir additive manufacturing device for high entropy alloy particle reinforced aluminum-based composite materials according to claim 6, characterized in that: The screw housing (13) is mounted on the parallel section of the extrusion screw (4).

8. The friction stir additive manufacturing device for high entropy alloy particle reinforced aluminum-based composite materials according to claim 1, characterized in that: The rotating shoulder (10) is connected to the transmission wheel (9) at the lower end of the shoulder motor (7) through a transmission belt (8). The shoulder motor (7) drives the rotating shoulder (10) to rotate at a high speed. The rotating shoulder (10) has a rotation speed of 100-400 rpm. The height of the protrusion (201) at the bottom of the rotating shoulder (10) can be selected to be 1-3 mm according to the thickness of the additive layer.

9. A method for manufacturing a friction stir additive manufacturing device for high entropy alloy particle reinforced aluminum-based composite materials, based on the friction stir additive manufacturing device for high entropy alloy particle reinforced aluminum-based composite materials according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: placing the ball-milled high entropy alloy powder and aluminum alloy particles in a raw material box (18) in a certain proportion, achieving preliminary uniform densification in the raw material box (18), and then preheating the mixed raw materials with an induction heater (15) at the bottom of the raw material box (18); Step 2: The preheated mixed raw material is continuously extruded by the feed roller (16) to complete the second uniform densification and then transported to the cavity of the extrusion screw (4); Step 3: The mixed raw material is subjected to strong shearing and extrusion during the rotation of the screw in the extrusion screw (4), and is thermally plasticized, completing the third uniform densification. Subsequently, under the action of the axial feed force of the extrusion screw (4), the thermally plasticized mixed metal fluid adheres to the surface of the substrate to form a deposition layer; Step 4: The rotating shoulder (10) rotates at high speed to stir and rub the deposited layer on the substrate, causing severe plastic deformation, achieving the fourth uniform densification, and finally obtaining a high entropy alloy particle reinforced aluminum-based composite material additive body.

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