Magnetic particle reinforced alloy electromagnetic centrifugal casting system and working method thereof

Abstract

The invention relates to the technical field of alloy casting, in particular to a magnetic particle reinforced alloy electromagnetic centrifugal casting system and a working method thereof. The electromagnetic centrifugal casting system comprises an electromagnetic centrifugal casting device, a driving device, an electromagnetic device and a vacuum device. The electromagnetic centrifugal casting device comprises a shell and a concentric cylindrical mold, the concentric cylindrical mold is rotationally installed in the shell and comprises an outer barrel and an inner barrel, the outer barrel is connected to the outer side of the inner barrel in a sleeving mode, a containing cavity is formed between the shell and the outer barrel, and a working cavity is formed between the outer barrel and the inner barrel; the driving device is used for driving the concentric cylindrical mold to rotate, the electromagnetic device is arranged in the containing cavity in a radioactive mode and used for generating a magnetic field, and the vacuum device is connected with the shell and used for vacuumizing. According to the invention, the problems of particle aggregation and uneven distribution in the traditional process are solved, and the mechanical property and production efficiency of the composite material are obviously improved.

Description

Technical Field

[0001] The present invention relates to the technical field of alloy casting, and particularly relates to a magnetic particle enhanced alloy electromagnetic centrifugal casting system and its working method. Background Art

[0002] In recent years, with the surge in demand for high-performance alloy materials in the high-end manufacturing field, carbon group nanomaterials (such as graphene and carbon nanotubes) have become a research hotspot for the reinforcement and modification of metal matrix composites due to their excellent mechanical, electrical, and thermal properties. Research shows that introducing nano-reinforcing phases into the alloy matrix can significantly improve the hardness, wear resistance, and corrosion resistance of materials. However, there are significant technical bottlenecks in traditional preparation processes: the density difference between carbon group nanoparticles and the matrix leads to a significant radial gradient distribution under the centrifugal force field, resulting in mechanical property anisotropy; nanoparticles agglomerate due to van der Waals forces, and it is difficult to achieve nano-scale dispersion with traditional mechanical stirring and static electromagnetic fields; there is a lack of a coordinated regulation mechanism for centrifugal force, electromagnetic force, buoyancy, and gravity, and the superposition of the Marangoni effect and Stokes buoyancy at the melt solidification front causes local enrichment, with a finished product rate of less than 75%; it is difficult to synergistically optimize process parameters and production efficiency, and it highly depends on manual experience.

[0003] A prior art discloses a magnetic field-assisted centrifugal casting process for threaded groove cylinder liners (patent number CN201610756702), which uses an Fe-C-Si-Mn alloy and applies a magnetic field of 0.01 - 0.5 T to inhibit the agglomeration of reinforcing phases, and combines with ceramic infiltration treatment to form a ceramic composite layer. Although the magnetic field improves the particle distribution uniformity by 20%, the ceramic infiltration needs to be kept warm at 265°C ± 5°C for 8 hours, and the single-piece energy consumption reaches 15 kW·h; moreover, the accuracy requirement for the gas ratio of silane / borane is high, and a proportion deviation easily causes the bonding strength of the ceramic layer to decrease by > 30%. Additionally, due to the complex curved surface structure of the threaded groove, the melt front flow velocity difference during centrifugal casting reaches 2 m / s, resulting in a porosity > 5% at the bottom of the groove, and the finished product rate is only 78%.

[0004] Another prior art discloses a centrifugal casting method for self-generated Al3Ni / Si particle-reinforced pistons (patent number CN201110398911), which makes the primary Al3Ni drive the Si particles to segregate at the piston head by regulating the composition of the Al-Si-Ni alloy. Although this method utilizes the density difference to achieve a gradient distribution of self-generated particles, the high nickel content significantly increases the raw material cost by 40%, and the pouring temperature (750 - 950°C) and mold preheating temperature (200 - 700°C) need to be precisely controlled during centrifugation. A temperature difference exceeding ±20°C will cause microcracks at the interface between the reinforced area and the non-reinforced area. At the same time, the hardness difference between the Al3Ni particles and the matrix is too large, which easily causes stress concentration, and the fatigue life is only 80% of that of traditional pistons.

[0005] Another prior art discloses a silicon nitride / zirconium carbide reinforced titanium matrix composite (patent number CN201810154411), which uses hydrofluoric acid pickling to remove the oxide on the particle surface and combines vacuum ball milling and centrifugal casting to form. Although this method increases the tensile strength by 30%, the hydrofluoric acid treatment generates hazardous waste liquid, and the environmental protection cost increases by 25%. Moreover, due to the high viscosity of the titanium liquid, mechanical stirring introduces a porosity > 3%, and during centrifugal casting, the reinforcing phase is enriched towards the outer wall under the influence of the Coriolis force (gradient difference > 40%), resulting in significant anisotropy of the composite material.

[0006] In summary, the electromagnetic centrifugal casting of magnetic nanoparticle-reinforced alloys still faces many challenges. First, due to their high specific surface area, nanoparticles are prone to agglomeration and difficult to disperse uniformly in the molten metal, resulting in uneven distribution of the reinforcing phase and affecting the stability of the material properties. Second, under the action of centrifugal force, the density difference between the nanoparticles and the matrix metal may cause phase separation, resulting in compositional gradients or local enrichment, weakening the overall mechanical properties of the alloy. In addition, the interfacial reaction between the nanoparticles and the matrix during the high-temperature casting process is difficult to control, easily forming brittle compounds or interfacial defects and reducing the interfacial bonding strength. There is no clear standard for the coordinated optimization of process parameters, and small deviations may lead to defects such as porosity, shrinkage porosity, or cracks. At the same time, the high cost and complex process requirements of nanomaterials further restrict their large-scale application. Summary of the Invention

[0007] Aiming at the deficiencies of the prior art, the purpose of the embodiments of the present invention is to provide a magnetic particle-reinforced alloy electromagnetic centrifugal casting system and its working method.

[0008] To achieve the above purpose, the embodiments of the present invention provide the following technical solutions:

[0009] A magnetic particle-reinforced alloy electromagnetic centrifugal casting system and its working method, including: an electromagnetic centrifugal casting device, a driving device, an electromagnetic device, and a vacuum device; the electromagnetic centrifugal casting device includes a housing and a concentric cylindrical mold, the concentric cylindrical mold is rotatably installed in the housing, the concentric cylindrical mold includes an outer cylinder and an inner cylinder, the outer cylinder is sleeved outside the inner cylinder, there is a receiving cavity between the housing and the outer cylinder, and a working cavity is formed between the outer cylinder and the inner cylinder; the driving device is used to drive the concentric cylindrical mold to rotate, the electromagnetic device is arranged radially in the receiving cavity to generate a magnetic field, and the vacuum device is connected to the housing to evacuate the air.

[0010] The core of the electromagnetic centrifugal casting system is the outer shell and the concentric cylindrical mold. The mold consists of an outer cylinder and an inner cylinder. The outer cylinder is sleeved outside the inner cylinder to form a working cavity for casting. The accommodating cavity between the outer shell and the outer cylinder is used to arrange the electromagnetic device. The driving device drives the mold to rotate at a high speed, the electromagnetic device generates a dynamic magnetic field in a radioactive arrangement, and the vacuum device reduces the oxidation of the melt by evacuating. This structure solves the problems of nanoparticle agglomeration and uneven distribution in the traditional process through the synergistic effect of multi-field coupling (centrifugal force, electromagnetic force, vacuum environment), improving the alloy performance and the yield rate.

[0011] Optionally, the lower end of the concentric cylindrical mold is rotatably connected to the outer shell through a pedestal bearing. The lower ends of the outer cylinder and the inner cylinder are both installed on a double-bolt-hole flange, and the double-bolt-hole flange is installed on the inner ring of the pedestal bearing. The lower end of the pedestal bearing has legs, and the legs are connected to the outer shell. This design ensures the stability of the mold during high-speed rotation, avoids uneven particle distribution or mold damage caused by vibration, and is convenient for installation and disassembly, improving the reliability and maintenance convenience of the system.

[0012] Optionally, the upper end of the concentric cylindrical mold is rotatably connected to the outer shell through a deep groove ball bearing. A support plate is provided on the inner wall of the outer shell, and a clamping groove is provided at the top inside the support plate. The deep groove ball bearing is embedded in the clamping groove, and the upper end of the outer ring of the outer cylinder is connected to the inner ring of the deep groove ball bearing. This structural design ensures the stability and rotation accuracy of the upper end of the mold, reduces friction and wear, and prolongs the service life of the mold. The high-precision rotation performance of the deep groove ball bearing helps to maintain the dynamic balance of the mold during high-speed operation, further improving the uniformity of nanoparticle distribution.

[0013] Optionally, a protective cover is rotatably installed on the outer shell. A fixed column is installed on the protective cover. A support column is fixedly installed on the outer wall of the outer shell. A winch drum is installed at the bottom of the support column. A steel wire rope is wound around the winch drum, and the other end of the steel wire rope bypasses the top of the support column and is connected to the fixed column. The precise control of the protective cover is realized through the transmission of the steel wire rope, ensuring that the protective cover can be reliably closed during the casting process, avoiding melt splashing or oxidation, and being convenient for operation and maintenance, improving safety and efficiency.

[0014] Optionally, the driving device includes a stepper motor, a gearbox, and a transmission mechanism. The transmission mechanism includes a transmission shaft, a driving gear, and a driven gear. The motor is connected to the input end of the gearbox. The transmission shaft is located between the outer shell and the outer cylinder. The output end of the gearbox is connected to the transmission shaft. The driving gear is mounted on the transmission shaft. The driven gear is mounted on the outer circumference of the outer cylinder and meshes with the driving gear. This transmission structure realizes the efficient transmission of power, ensuring that the concentric cylindrical mold can adjust the rotation speed according to the alloy type and complete precise centrifugal casting. The high-precision control of the stepper motor combined with the stability of gear transmission makes the mold speed adjustment more flexible and adapts to the process requirements of different materials.

[0015] Optionally, the electromagnetic device includes an electromagnet, an electromagnet bracket, and a hinge seat. The hinge seat is mounted on the inner wall of the outer shell. The electromagnet bracket is hingedly connected to the outer shell through the hinge seat. The electromagnet is mounted on the electromagnet bracket. This design allows the electromagnet to adjust the angle according to the working requirements. By controlling the current magnitude through a frequency converter, the dynamic regulation of the magnetic field strength and direction is realized. The radial arrangement and angle adjustment function of the electromagnet can generate a composite force field, offsetting the particle cohesion caused by centrifugal force and the floating agglomeration caused by buoyancy, ensuring the uniform distribution of magnetic nanoparticles in the alloy melt.

[0016] Optionally, the electromagnetic centrifugal casting system further includes a cooling device. The cooling device includes a water tank, a water inlet pipe, a water pump, a water outlet pipe, and a ring header. The two ends of the water inlet pipe are respectively connected to the water tank and the water pump. The two ends of the water outlet pipe are respectively connected to the water pump and the ring header. The ring header includes a ring pipe, outer risers, inner risers, and nozzles. The outer risers and the inner risers are both communicated with the ring pipe. The ring pipe and the outer risers are located in the cavity between the outer shell and the outer cylinder. The inner riser is located in the inner cylinder. The nozzles are arranged on the outer risers and the inner risers and respectively face the cylinder walls of the outer cylinder and the inner cylinder.

[0017] The cooling water in the water tank is pumped out by the water pump and pressurized, and sprayed on the mold surface through the nozzles to achieve efficient cooling. Moreover, synchronous cooling of the outer and inner cylinders can be realized. Combined with the feedback of the temperature sensor, the mold temperature is dynamically controlled to avoid pores or cracks caused by overheating of the melt and improve the density of the casting.

[0018] Optionally, the electromagnetic centrifugal casting system further includes a demolding device. The demolding device includes a cylinder, a pneumatic pipeline, a pneumatic slip ring, and an air outlet pipe. The pneumatic slip ring is mounted on a pedestal bearing. One end of the pneumatic pipeline is connected to an air pump, and the other end is connected to the air inlet of the pneumatic slip ring. One end of the air outlet pipe is connected to the air outlet of the pneumatic slip ring. A middle push plate is arranged between the outer cylinder and the inner cylinder. The middle push plate can move up and down relative to the outer cylinder and the inner cylinder. The other end of the air outlet pipe is communicated with the chamber on the lower side of the middle push plate.

[0019] After casting is completed, compressed air is transmitted to the bottom of the push plate through the slip ring to eject the casting, achieving efficient demolding. The design of the pneumatic slip ring ensures that compressed air can be normally transmitted under the condition that the mold rotates. Combined with the auxiliary effect of the vibrator, the demolding efficiency and the surface quality of the casting are further improved, and the damage of the casting caused by sticking to the mold is avoided.

[0020] An embodiment of the present invention also provides a magnetic particle enhanced alloy electromagnetic centrifugal casting system and its working method as described above, including the following steps:

[0021] Adjust the direction and current magnitude of the electromagnet according to the type of non-magnetic metal to be cast; inject the magnetic nano composite solution into the concentric cylindrical mold, and when the pressure value reaches the standard, close the protective cover and evacuate; the driving device drives the concentric cylindrical mold to rotate, and adjusts the rotation speed according to the alloy type, and completes centrifugal casting after a preset time; after casting is completed, ventilate the concentric cylindrical mold for demolding; open the protective cover, take out the cast workpiece and place it at the designated position.

[0022] Optionally, dynamically monitor the mold temperature, and when the temperature exceeds the preset value, turn on the cooling device until the temperature drops below the set value.

[0023] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0024] 1. The electromagnetic centrifugal casting system of the present invention realizes the uniform distribution of magnetic nanoparticles in the alloy melt through multi-field coupling regulation. The system mainly includes an electromagnetic centrifugal casting device, a driving device, an electromagnetic device and a vacuum device. The concentric cylindrical mold of the electromagnetic centrifugal casting device is composed of an outer cylinder and an inner cylinder. The outer cylinder is sleeved outside the inner cylinder to form a working cavity. The driving device drives the mold to rotate at high speed through gear transmission. The electromagnetic device is radially arranged in the accommodating cavity to generate a dynamic magnetic field to regulate the distribution of nanoparticles. The vacuum device avoids the oxidation of the melt by evacuating, improving the quality of the casting. This system solves the problems of particle agglomeration and uneven distribution in the traditional process by coordinately regulating the centrifugal force, electromagnetic force, buoyancy and gravity, and significantly improves the mechanical properties and production efficiency of the composite material.

[0025] 2. The present invention realizes the uniform dispersion of magnetic nanoparticle enhancement in the alloy solution through dynamic regulation of the circumferential array electromagnet. Through the cooperative action of the adjustable electromagnetic force field from 0° to 90° and the centrifugal force, buoyancy and gravity, the problems of radial adhesion agglomeration and upper surface aggregation of magnetic nanoparticles in the traditional process are solved. By dynamically regulating the angle between the direction of the electromagnetic force and the axis of the mold, the multi-field force action is balanced, so that the low-density magnetic nanoparticles are uniformly distributed in the alloy melt under the drive of the electromagnetic force and the centrifugal force, significantly improving the mechanical properties and production efficiency of the composite material, and being applicable to the industrial production of high-precision wear-resistant alloy components.

[0026] 3. The magnetic nanoparticles prepared by the system are in a three-dimensional uniform dispersion state in the annular cavity of the concentric cylindrical mold, without the inner cylinder aggregation phenomenon in the prior art and no radial concentration gradient; in the radial distribution direction, there is no obvious concentration gradient of the magnetic nanoparticles in the radial direction of the mold; in the circumferential distribution direction, the magnetic nanoparticles are in a discrete state in the circumferential direction, the distance between adjacent particles is uniform and there is no agglomeration and bonding; in the axial distribution direction, the magnetic nanoparticles are isotropically dispersed along the axis direction of the mold, avoiding the top aggregation caused by the buoyancy effect in the traditional centrifugal casting.

[0027] Advantages of additional aspects of the present invention will be given in the following description, some of which will become obvious from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. In addition, the distances or sizes between components are exaggerated for showing the positions of the components, and the schematic diagrams are only for illustration.

[0029] Figure 1 Isometric view of the electromagnetic centrifugal casting system according to the embodiment of the present invention;

[0030] Figure 2 Explosion view of the electromagnetic centrifugal casting system according to the embodiment of the present invention;

[0031] Figure 3 Partial isometric view of the electromagnetic centrifugal casting device according to the embodiment of the present invention;

[0032] Figure 4 Partial cross-sectional view of the electromagnetic centrifugal casting device according to the embodiment of the present invention;

[0033] Figure 5 Explosion view of the electromagnetic centrifugal casting device according to the embodiment of the present invention;

[0034] Figure 6 Cross-sectional view of the electromagnetic centrifugal casting product according to the present invention;

[0035] Figure 7 Overall view of the electromagnetic centrifugal casting product according to the present invention;

[0036] Figure 8 Overall cross-sectional view of the electromagnetic centrifugal casting product according to the present invention;

[0037] Figure 9This is the schematic diagram of the electromagnetic centrifugal casting product of the present invention;

[0038] Figure 10 This is the flow chart of the electromagnetic centrifugal casting system of the present invention; Detailed implementation manners

[0039] It should be noted that the following detailed description is exemplary and is intended to provide further illustration of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. In addition, it should also be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0040] Embodiment 1

[0041] From Figure 1 and Figure 2 it can be seen that the electromagnetic centrifugal casting system VII consists of a water tank support VII-1, a water tank VII-2, a necked butt-welding flange VII-3, a Z-shaped baffle VII-5, a water inlet pipe VII-4, an air pump VII-6, a base plate VII-7, a third solenoid valve VII-8, a pneumatic pipeline VII-9, a drain pipe VII-10, a gearbox VII-11, a spherical roller bearing VII-12, a frequency converter VII-13, a second coupling VII-14, a straight bevel gear pair VII-15, a contactor VII-16, a second snap ring VII-17, an air outlet pipe VII-18, an electromagnetic centrifugal casting device VII-19, a protective cover VII-20, a second feed inlet VII-21, a fixing column VII-22, a butterfly hinge VII-23, a hinge column VII-5, a deep groove ball bearing VII-25, a steel wire rope VII-26, an elastic locking pin VII-27, a winch drum VII-28, a second servo motor VII-29, a support column VII-30, a tee joint VII-31, a stepping motor VII-33, a water outlet pipe VII-35, a PLC controller VII-36, a fourth solenoid valve VII-37, a third servo motor VII-38, a centrifugal pump VII-39, a foldable three-color alarm light VII-50, and a third base VII-41.

[0042] As Figure 3 and Figure 4 and Figure 5 shown, the electromagnetic centrifugal casting device VII-19 consists of a gearbox VII-11, a spherical roller bearing VII-12, a second coupling VII-14, a straight bevel gear pair VII-15, a stepping motor VII-33, a third base VII-41, a pedestal bearing VII-19-1, a double-bolt-hole flange VII-19-2, a hinge seat VII-19-6, an electromagnet support VII-19-8, a second driven gear VII-19-9, an electromagnet VII-19-10, a deep groove ball bearing VII-19-11, an outer cylinder VII-19-12, an inner cylinder VII-19-13, a transmission shaft VII-19-14, a driving gear VII-19-15, and a machine body shell VII-19-23, etc.

[0043] The second retaining ring Ⅶ-17 (with the fixed platform type bracket) is fixed by bolts, and the electromagnetic centrifugal casting device Ⅶ-19 is installed in the card slot of the fixed platform type bracket; the inner ring of the deep groove ball bearing Ⅶ-19-11 is welded to the upper end of the outer cylinder Ⅶ-19-12 and installed at the inner card slot of the machine body shell Ⅶ-19-23.

[0044] The concentric cylindrical mold is composed of the outer cylinder Ⅶ-19-12 and the inner cylinder Ⅶ-19-13, and is connected to the double bolt hole flange Ⅶ-19-2 by bolts; the double bolt hole flange Ⅶ-19-2 is welded to the inner ring of the pedestal bearing Ⅶ-19-1. The lower end of the pedestal bearing Ⅶ-19-1 has six cylindrical legs and is connected to the machine body shell Ⅶ-19-23 by bolts to provide stable support for the concentric cylindrical mold.

[0045] The outer layer of the middle part of the outer cylinder Ⅶ-19-12 is welded to the second driven gear Ⅶ-19-9. The driving gear Ⅶ-19-15 meshes with the second driven gear Ⅶ-19-9 to transmit power to the concentric cylindrical mold and drive it to rotate at high speed to complete casting. The stepping motor Ⅶ-33 is used as the power source, and its opening and closing operation is realized through the connecting contactor Ⅶ-16. It is fixed to the third base Ⅶ-41 by bolts and connected to the gearbox Ⅶ-11. A straight bevel gear pair Ⅶ-15 is installed inside the gearbox Ⅶ-11, and its axis is vertically arranged at 90 degrees; the output end of the stepping motor Ⅶ-33 is connected to the straight bevel gear pair Ⅶ-15 through the second coupling Ⅶ-14 to transmit power; there are two holes on the outer shell of the gearbox Ⅶ-11 that cooperate with the spherical roller bearing Ⅶ-12 and are connected by interference fit; the output end of the straight bevel gear pair Ⅶ-15 is connected to the transmission shaft Ⅶ-19-14 by a key to transmit power, and the transmission shaft Ⅶ-19-14 is then connected to the driving gear Ⅶ-19-15 by welding to transmit power. The stepping motor Ⅶ-33, the gearbox Ⅶ-11, the third base Ⅶ-41, the spherical roller bearing Ⅶ-12, the straight bevel gear pair Ⅶ-15, the transmission shaft Ⅶ-19-14 and the driving gear Ⅶ-19-15 are symmetrically distributed with respect to the vertical central plane of the concentric cylindrical mold, making the equipment operation more stable.

[0046] The electromagnets are arranged to extend radially and uniformly in six columns with reference to the axis of the outer cylinder Ⅶ-19-12, and five are arrayed at equal intervals along the Z-axis in each column. The electromagnetic device consists of the electromagnet Ⅶ-19-10, the electromagnet bracket Ⅶ-19-8, and the hinge seat Ⅶ-19-6. The current magnitude of the electromagnet Ⅶ-19-10 is controlled by the frequency converter Ⅶ-13; the electromagnet Ⅶ-19-10 is connected to the electromagnet bracket Ⅶ-19-8 by bolts and nuts, the electromagnet bracket Ⅶ-19-8 is connected to the hinge seat Ⅶ-19-6 by bolts and nuts, and the hinge seat Ⅶ-19-6 is fixedly connected to the body shell Ⅶ-19-23 by bolts. The electromagnetic bracket Ⅶ-19-8 can rotate flexibly around the hinge seat Ⅶ-19-6, and the angle of the electromagnet Ⅶ-19-10 can be adjusted according to different working requirements.

[0047] The cooling device consists of the water tank bracket Ⅶ-1, the water tank Ⅶ-2, the Z-shaped baffle Ⅶ-5, the water inlet pipe Ⅶ-4, the drain pipe Ⅶ-10, the second coupling Ⅶ-14, the water outlet pipe Ⅶ-35, the fourth solenoid valve Ⅶ-37, the third servo motor Ⅶ-38, the centrifugal pump Ⅶ-39, the annular header Ⅶ-19-3, and the spray head Ⅶ-19-7.

[0048] The water tank Ⅶ-2 is installed in the card slot of the water tank bracket Ⅶ-1 to obtain reliable support. The water tank bracket Ⅶ-1 is connected to the XY-axis moving platform by bolts and fixed by the Z-shaped baffle Ⅶ-5 to prevent displacement; the lower end of the water inlet pipe Ⅶ-4 is connected to the bottom of the water tank Ⅶ-2, and the upper end is connected to the water inlet of the centrifugal pump Ⅶ-39 by bolts. The connection with the water tank Ⅶ-2 is fixedly welded by the necked butt weld flange Ⅶ-3, and the necked butt weld flange Ⅶ-3 is connected to the shell of the water tank Ⅶ-2 by bolts; the water pump consists of the third servo motor Ⅶ-38 and the centrifugal pump Ⅶ-39 and transmits power through the second coupling Ⅶ-14. The water outlet pipe Ⅶ-35 is connected to the water outlet of the centrifugal pump Ⅶ-39 by bolts, and the fourth solenoid valve Ⅶ-37 is connected to the water outlet pipe Ⅶ-35 by threads to control the inflow and outflow of water; the water outlet pipe Ⅶ-35 and the annular header Ⅶ-19-3 are connected by the coupling Ⅶ-14. The upper end of the drain pipe Ⅶ-10 is connected to the body shell Ⅶ-19-23, and the lower end is connected to the bottom of the water tank Ⅶ-2 to return the sprayed water to the water tank Ⅶ-2 for repeated recycling. The annular header Ⅶ-19-3 is connected to the spray head Ⅶ-19-7 by threads. The water in the water tank Ⅶ-2 is pumped out and pressurized through the water inlet pipe Ⅶ-4, and is transported to the spray head Ⅶ-19-7 through the water outlet pipe Ⅶ-35 and the annular header Ⅶ-19-3 to achieve cooling.

[0049] The demolding device consists of the air pump Ⅶ-6, the third solenoid valve Ⅶ-8, the pneumatic pipeline Ⅶ-9, the air outlet pipe Ⅶ-18, the pipe joint Ⅶ-19-20, the pneumatic slip ring Ⅶ-19-21, the push plate Ⅶ-19-24, the vibrator jacket Ⅶ-19-18, and the vibrator Ⅶ-19-19.

[0050] The air pump Ⅶ-6 serves as the power source. The air pump Ⅶ-6 is connected to the pneumatic pipeline Ⅶ-9 through the third solenoid valve Ⅶ-8. The other end of the pneumatic pipeline Ⅶ-9 is threadedly connected to the air inlet of the air pipe joint Ⅶ-19-20. The pneumatic slip ring Ⅶ-19-21 is fixed to the outer ring of the pedestal bearing Ⅶ-19-1 by bolts. The outlet pipe Ⅶ-18 is threadedly connected to the air pipe joint Ⅶ-19-20 at the air outlet of the pneumatic slip ring Ⅶ-19-21. The outlet pipe Ⅶ-18 passes through the double-bolt-hole flange Ⅶ-19-2 and is located at the bottom of the push plate Ⅶ-19-24 between the two cylinders of the concentric cylinder mold, and is symmetrically distributed along the central longitudinal plane of the concentric cylinder mold; the push plate Ⅶ-19-29-24 is closely fitted with the position between the large and small cylinders of the concentric cylinder mold; the pneumatic pipeline Ⅶ-9 connecting the air pump Ⅶ-6 realizes the rotary connection with the help of the pneumatic slip ring Ⅶ-19-21. One end of the pneumatic slip ring Ⅶ-19-21 is butted with the fixed pneumatic pipeline Ⅶ-9 through the air pipe joint Ⅶ-19-20, and the other end is connected to the outlet pipe Ⅶ-18 that rotates with the rotating part, ensuring that the compressed air can still be normally transmitted under the 360-degree rotation state and ensuring the stable operation of the entire demoulding system; the vibrator jacket Ⅶ-19-18 is sleeved on both ends of the vibrator Ⅶ-19-19 and is bolted to the bottom of the double-bolt-hole flange Ⅶ-19-2, and the opening and closing work is realized through the connecting contactor Ⅶ-16, which plays an auxiliary role in demoulding the workpiece. After centrifugal casting, the adhesion between the workpiece and the mold is destroyed by the vibrator, and then the workpiece is pushed out by compressed air in cooperation with the middle push plate.

[0051] The hydraulic valve driving device is composed of a contactor Ⅶ-16, a protective cover Ⅶ-20, a fixed column Ⅶ-22, a butterfly hinge Ⅶ-23, a hinge column Ⅶ-24, a deep groove ball bearing Ⅶ-25, a steel wire rope Ⅶ-26, an elastic locking pin Ⅶ-27, a hoisting drum Ⅶ-28, a second servo motor Ⅶ-29 and a support column Ⅶ-30.

[0052] The second servo motor Ⅶ-29 serves as the power source. It realizes the opening and closing of the valve by connecting with the contactor Ⅶ-16. Its output shaft is rigidly connected to the hoisting drum Ⅶ-28 through interference fit, providing power for the rotation of the hoisting drum Ⅶ-28. The support column Ⅶ-30 is welded to the preset position of the machine body shell Ⅶ-19-23. The hinge column Ⅶ-24 is aligned and connected with the hole position of the support column Ⅶ-30. The inner ring of the deep groove ball bearing Ⅶ-25 is tightly sleeved on the smooth journal part of the hinge column Ⅶ-24 and connected through interference fit to form a rotatable fulcrum. One end of the steel wire rope Ⅶ-26 is fixed to the hoisting drum Ⅶ-28, and the other end is connected to the fixed column Ⅶ-22 to realize the winding and unwinding action through the rotation of the hoisting drum Ⅶ-28. The elastic locking pin Ⅶ-27 is inserted into the pin hole of the output shaft of the second servo motor Ⅶ-29 to prevent its axial or radial movement. The hinge column Ⅶ-24 is installed in the upper groove of the machine body shell Ⅶ-20-23. The butterfly hinge Ⅶ-24 passes through the hinge column Ⅶ-24 for mating connection to realize rotation. One end is connected to the machine body shell Ⅶ-19-23, and the other end is connected to the protective cover Ⅶ-20 to realize 360° free rotation, meeting the requirements of the opening and closing of the protective cover Ⅶ-20 and working condition adjustment.

[0053] The vacuum device consists of a rotary vane vacuum pump Ⅶ-34, a contactor Ⅶ-16, a vacuum tube Ⅶ-32, a machine body shell Ⅶ-19-23, and a third base Ⅶ-41. The rotary vane vacuum pump Ⅶ-34 is fixed to the third base Ⅶ-41 by bolts. The vacuum tube Ⅶ-32 is connected to the rotary vane vacuum pump Ⅶ-34 by bolts. The vacuum tube Ⅶ-32 is connected to the connection hole of the machine body shell Ⅶ-19-23 by welding. The opening and closing of the rotary vane vacuum pump are controlled by the contactor Ⅶ-16 to realize non-contact between the melt and air, effectively avoiding the occurrence of melt oxidation, thus greatly reducing the oxidation inclusion defects in the workpiece and improving the quality of the workpiece.

[0054] The control system consists of a PLC controller Ⅶ-36, an infrared thermal imager Ⅶ-19-16, a line structured light sensor Ⅶ-19-5, a pressure sensor Ⅶ-19-4, and a temperature sensor Ⅶ-19-22; the infrared thermal imager Ⅶ-19-16 is installed at the middle position inside the body shell Ⅶ-19-23, and is used to check whether there are defects such as cracks, pores, or uneven thickness in the outer cylinder Ⅶ-19-12 and the inner cylinder Ⅶ-19-13; the line structured light sensor Ⅶ-19-5 is installed at the bottom of the outer cylinder Ⅶ-19-12, and is used to detect the gap between the outer cylinder Ⅶ-19-12 and the inner cylinder Ⅶ-19-13 and the double-bolt hole flange Ⅶ-19-2; the pressure sensor Ⅶ-19-4 is installed in the groove of the double-bolt hole flange Ⅶ-19-2, and is used to detect the content of the molten slurry; the PLC controller Ⅶ-36 is installed on the XY-axis moving platform by bolts. The PLC controller, frequency converter, contactor, infrared thermal imager, line structured light sensor, pressure sensor, temperature sensor, second servo motor, third solenoid valve, fourth solenoid valve, vibrator, rotary vane vacuum pump, and stepper motor all perform processing and analysis on the signals fed back by the sensors with the PLC controller, and then control.

[0055] In the present invention, magnetic nanoparticles are exemplified by graphene-coated magnetite particles, carbon nanotube-coated magnetite particles, graphene-coated cobalt nanoparticles, etc. The enhanced alloy material is a non-magnetic conductive metal material.

[0056] As Figure 6 shown, it is a cross-sectional schematic diagram of the electromagnetic centrifugal casting system of the present invention. In the figure, the magnetic nanocomposite material is uniformly distributed in the concentric cylindrical mold, separated from each other, and there is no agglomeration and bonding phenomenon.

[0057] As Figure 7 shown, this figure is an overall schematic diagram of the electromagnetic centrifugal casting product of the present invention. The magnetic nanoparticles are in a three-dimensional uniform dispersion state in the annular cavity of the concentric cylindrical mold. There is neither the inner cylinder aggregation phenomenon in the prior art nor a radial concentration gradient; in the radial distribution direction, there is no obvious concentration gradient of the magnetic nanoparticles in the radial direction of the mold; in the circumferential distribution direction, the magnetic nanoparticles remain discrete in the circumferential direction, the spacing between adjacent particles is uniform and there is no agglomeration and bonding; in the axial distribution direction, the magnetic nanoparticles are isotropically dispersed along the axis direction of the mold, avoiding the top aggregation caused by the buoyancy force in traditional centrifugal casting.

[0058] As Figure 8 shown, this figure is an overall cross-sectional view of the electromagnetic centrifugal casting product of the present invention. This figure clearly shows that the magnetic nanoparticles are under the synergistic action of electromagnetic force, centrifugal force, buoyancy force, and gravity in the annular cavity of the concentric cylindrical mold, forming an isotropic dispersion structure, without the top aggregation caused by the buoyancy force, which is significantly better than the traditional process.

[0059] AsFigure 9 As shown, this figure is the schematic diagram of the electromagnetic centrifugal casting product of the present invention, and the magnetic nanoparticles are analyzed as follows:

[0060] The volume of the magnetic nanoparticles

[0061]

[0062] where r is the particle radius (m) and the rotational speed of the centrifuge.

[0063]

[0064] where g is the acceleration due to gravity (9.81 m / s 2 ), D is the inner diameter of the outer cylinder, and d is the inner diameter of the inner cylinder.

[0065] The centrifugal force acting on the magnetic nanoparticles

[0066] F c = ρ p Vω 2 R (0.3)

[0067] where ρ p is the particle density (kg / m 3 ), V is the particle volume (m 3 ), ω is the angular velocity (rad / s), and R is the mold radius (m).

[0068] The gradient resistance acting on the magnetic nanoparticles

[0069] F p = 6πηrv (0.4)

[0070] where η is the dynamic viscosity of the solution r is the particle radius (m), and v is the relative velocity of the object with respect to the fluid (m / s).

[0071] The magnetic field strength of the electromagnet

[0072]

[0073] where B is the magnetic induction intensity (T), L is the length of the magnetic core (m), N is the number of turns of the coil, I is the current passing through the electromagnet coil (A), and μ is the magnetic permeability of the material (H / m)

[0074] The electromagnetic force of the electromagnet

[0075]

[0076] μ = μ0μr (0.7)

[0077]

[0078] By combining (1.5), (1.6), (1.7), and (1.8), we get:

[0079]

[0080] where L is the length of the magnetic core (m), N is the number of turns of the coil, I is the current passing through the electromagnet coil (A), μ0 is the magnetic permeability of vacuum (4π×10 -7 H / m), μ r is the relative magnetic permeability, and A is the area acted upon by the magnetic field of the electromagnet (m 2 ²).

[0081] The gravitational force on the magnetic nanoparticles

[0082] F g = mg = ρ m gv (0.10)

[0083] where ρ m is the solution density (kg / m 3 ³), v is the particle volume (m 3 ³), and g is the acceleration due to gravity (9.81 m / s 2 ²).

[0084] The buoyant force on the magnetic nanoparticles

[0085] F b = ρ p gv (0.11)

[0086] where ρ p is the particle density (kg / m 3 ³), g is the acceleration due to gravity (9.81 m / s 2 ²), and v is the particle volume (m 3 ³).

[0087] The mechanical equilibrium equation

[0088]

[0089] where F m is the electromagnetic force of the electromagnet (N), F p is the gradient resistance on the magnetic nanoparticles, F c is the centrifugal force on the magnetic nanoparticles (N), F g is the gravitational force on the magnetic nanoparticles (N), and α is the inclination angle of the electromagnet.

[0090] The angle α of the electromagnet

[0091]

[0092] where Fm is the electromagnetic force (N) of the electromagnet, F p is the gradient resistance received by the magnetic nanoparticles, F c is the centrifugal force (N) received by the magnetic nanoparticles, F g is the gravity (N) received by the magnetic nanoparticles, and α is the tilt angle of the electromagnet.

[0093] It can be seen from formulas (1.3), (1.4), (1.5), (1.9), (1.10), and (1.11) that the uniform distribution of magnetic nanoparticles is achieved through multi-field coupling regulation. The magnetic nanoparticles are subject to a pressure gradient force F pointing towards the axis at different centrifugal radii and in the same radial direction P 1, F P 2, F P 3, centrifugal force F c 1, F c 2, F c 3 and electromagnetic force F m 1, F m 2, F m 3. Due to different radii, F P 1 > F P 2 > F P 3, F c 3 > F c 2 > F c 1, F m 3 > F m 2 > F m 1; The electromagnetic force can be decomposed into vertical and horizontal component forces, that is: F m 3 y > F m 2 y > F m 1 y , F m 3 x > F m 2 x > F m 1 x ; The gravity and buoyancy received by the magnetic nanoparticles are equal in magnitude, that is: F g 1 = F g 2 = F g 3, F b 1 = F b 2 = F b 3; According to the formula F d = 6·π·μ·r p ·(v fluid - v p ) it is known that the magnetic nanoparticles are also subject to fluid resistance in the radial direction, but it has little effect on the distribution of the magnetic nanoparticles and will not be studied here; Finally, by F m , FP , F c , F b and F g Under the combined action of, they coordinate and restrict each other, and finally make the magnetic nanoparticles uniformly dispersed in a three-dimensional state in the annular cavity of the concentric cylindrical mold.

[0094] According to the theoretical calculation values, the present invention can initially obtain a parameter design table (Table 1):

[0095] Table 1: Relationship between grinding temperature and foaming amount

[0096]

[0097]

[0098] To sum up, the present invention uses an electromagnet array to dynamically regulate the magnetic field, and solves the problem of uniform distribution of magnetic nanoparticles in the alloy solution through the synergistic action of centrifugal force and electromagnetic force. The device adjusts the magnetic field direction and intensity through the electromagnet array surrounding the mold to generate a composite force field; the radial electromagnetic force cancels the particle cohesion caused by the centrifugal force, and the axial magnetic field gradient balances the buoyancy-gravity difference to inhibit particle floating and agglomeration. Combining the surface modification process enhances the interfacial bonding force between the nano-phase and the matrix, and finally improves the hardness, wear resistance, and fatigue resistance of the alloy.

[0099] Embodiment 2

[0100] This embodiment proposes a working method of the electromagnetic centrifugal casting system described in Embodiment 1, including pouring and filling, magnetic field regulation, centrifugal forming, temperature regulation, mold detection, pressure detection, cooling, intelligent control, etc.

[0101] Specifically, as shown by Figure 10 , at the beginning of centrifugal casting, the system first performs mold installation detection. The infrared thermal imager VII-19-16 is used to check whether there are defects such as cracks, pores, or uneven thickness in the outer cylinder VII-19-12 and the inner cylinder VII-19-13; the line structured light sensor VII-19-5 detects the gap between the outer cylinder VII-19-12 and the inner cylinder VII-19-13 and the double-bolt hole flange VII-19-2, and the gap does not exceed 0.05 mm. After both detections are qualified, the operation can continue; if any detection is unqualified, the system will trigger an alarm and return to the installation and inspection process until the standard is reached.

[0102] After the detection is passed, the PLC controller Ⅶ-36 controls the frequency converter Ⅶ-13 through a program to adjust the direction and current magnitude of the electromagnet Ⅶ-19-10 according to the type of non-magnetic metal to be cast, and injects the magnetic nano-composite solution into the concentric cylindrical mold; the pressure sensor Ⅶ-19-4 is installed in the groove of the double-bolt hole flange Ⅶ-19-2. Under the real-time monitoring of the pressure sensor Ⅶ-19-4, the PLC controller Ⅶ-36 determines whether the pressure value at the double-bolt hole flange Ⅶ-19-2 meets the standard (detecting the injection volume of the composite solution), and controls the stepping motor Ⅶ-33 through the contactor Ⅶ-16 to close the protective cover Ⅶ-20 and start the rotary vane vacuum pump Ⅶ-344 to extract vacuum; after an interval of 2 minutes, the PLC controller Ⅶ-36 controls the contactor Ⅶ-16 through a program to automatically start the electromagnetic centrifugal casting device Ⅶ-19 to run. At the same time, the temperature sensor Ⅶ-19-22 dynamically monitors the temperature of the concentric cylindrical mold in real time. When the temperature exceeds the preset value, the fourth solenoid valve Ⅶ-37 opens, and the cooling device starts to cool down. After the temperature drops below the set value, it is closed. According to the alloy type, the PLC controller Ⅶ-36 can also adjust the rotation speed of the stepping motor Ⅶ-33 and automatically stop after centrifugal casting is completed according to the preset time.

[0103] After casting is completed, the system controls the air pump Ⅶ-6 to ventilate and demold the concentric cylindrical mold through the third solenoid valve Ⅶ-8, and starts the vibrator Ⅶ-19-19 through the contactor Ⅶ-16 to further assist demolding for 2 minutes.

[0104] The contactor Ⅶ-16 is used to control the stepping motor Ⅶ-33 to open the protective cover Ⅶ-20. Subsequently, the PLC controller Ⅶ-36 controls the XY-axis moving platform to move along the pre-set route, transports the electromagnetic centrifugal casting system Ⅶ to the designated position, and then the clamping system moves to the corresponding position under precise control, takes out the centrifugally cast workpiece from the electromagnetic-assisted centrifugal casting system Ⅶ and places it at the designated position and closes the protective cover Ⅶ-20. After the robot accurately places it, the platform resets and prepares for the next cycle of casting operation.

[0105] This method breaks through the technical bottleneck of uneven distribution of reinforcement phases in traditional centrifugal casting, realizes the three-dimensional orderly dispersion of magnetic nanoparticles in the alloy, and is applicable to the industrial production of high-precision wear-resistant components such as bearings and cylinder liners.

[0106] Although the specific implementation manners of the present invention are described above in conjunction with the accompanying drawings, it is not a limitation to the protection scope of the present invention. Those skilled in the art should understand that based on the technical solutions of the present invention, various modifications or deformations that can be made by those skilled in the art without creative efforts are still within the protection scope of the present invention.

Claims

1. A magnetic particle enhanced alloy electromagnetic centrifugal casting system, characterized in that, Comprising: An electromagnetic centrifugal casting device, a driving device, an electromagnetic device, and a vacuum device; The electromagnetic centrifugal casting device includes a housing and a concentric cylindrical mold. The concentric cylindrical mold is rotatably installed within the housing. The concentric cylindrical mold includes an outer cylinder and an inner cylinder. The outer cylinder is sleeved outside the inner cylinder. There is a receiving cavity between the housing and the outer cylinder, and a working cavity is formed between the outer cylinder and the inner cylinder; The driving device is used to drive the concentric cylindrical mold to rotate. The electromagnetic device is radially arranged within the receiving cavity and is used to generate a magnetic field. The vacuum device is connected to the housing and is used to evacuate the air.

2. The electromagnetic centrifugal casting system for magnetic particle reinforced alloy according to claim 1, characterized in that, The lower end of the concentric cylindrical mold is rotatably connected to the housing through a pedestal bearing. The lower ends of both the outer cylinder and the inner cylinder are installed on a double-bolt-hole flange. The double-bolt-hole flange is installed on the inner ring of the pedestal bearing. The pedestal bearing has legs at the lower end, and the legs are connected to the housing.

3. A magnetic particle enhanced alloy electromagnetic centrifugal casting system according to claim 1, characterized in that, The upper end of the concentric cylindrical mold is rotatably connected to the housing through a deep groove ball bearing. A support plate is provided on the inner wall of the housing. A clamping groove is provided at the top inside the support plate. The deep groove ball bearing is embedded within the clamping groove. The upper end of the outer ring of the outer cylinder is connected to the inner ring of the deep groove ball bearing.

4. A magnetic particle enhanced alloy electromagnetic centrifugal casting system according to claim 1, characterized in that, A protective cover is rotatably installed on the housing. A fixed column is installed on the protective cover. A support column is fixedly installed on the outer wall of the housing. A hoisting drum is installed at the bottom of the support column. A steel wire rope is wound around the hoisting drum, and the other end of the steel wire rope bypasses the top of the support column and is connected to the fixed column.

5. The electromagnetic centrifugal casting system for magnetic particle enhanced alloy according to claim 1, wherein The driving device includes a stepping motor, a gearbox, and a transmission mechanism. The transmission mechanism includes a transmission shaft, a driving gear, and a driven gear. The motor is connected to the input end of the gearbox. The transmission shaft is located between the housing and the outer cylinder. The output end of the gearbox is connected to the transmission shaft. The driving gear is installed on the transmission shaft. The driven gear is installed on the outer ring of the outer cylinder and meshes with the driving gear.

6. The electromagnetic centrifugal casting system for magnetic particle enhanced alloy according to claim 1, wherein The electromagnetic device includes an electromagnet, an electromagnet support, and a hinge seat. The hinge seat is installed on the inner wall of the housing. The electromagnet support is hingedly connected to the housing through the hinge seat. The electromagnet is installed on the electromagnet support.

7. The electromagnetic centrifugal casting system for magnetic particle reinforced alloy according to claim 1, characterized in that The electromagnetic centrifugal casting system further includes a cooling device. The cooling device includes a water tank, a water inlet pipe, a water pump, a water outlet pipe, and an annular header. The two ends of the water inlet pipe are respectively connected to the water tank and the water pump. The two ends of the water outlet pipe are respectively connected to the water pump and the annular header. The annular header includes a ring pipe, outer risers, inner risers, and spray nozzles. The outer risers and the inner risers are both communicated with the ring pipe. The ring pipe and the outer risers are located within the cavity between the housing and the outer cylinder. The inner risers are located within the inner cylinder. The spray nozzles are provided on the outer risers and the inner risers and are respectively directed towards the barrel walls of the outer cylinder and the inner cylinder.

8. The electromagnetic centrifugal casting system for magnetic particle reinforced alloy according to claim 1, characterized in that The electromagnetic centrifugal casting system further includes a demolding device, which includes a cylinder, a pneumatic pipeline, a pneumatic slip ring and an air outlet pipe. The pneumatic slip ring is installed on a pedestal bearing. One end of the pneumatic pipeline is connected to an air pump, and the other end is connected to the air inlet of the pneumatic slip ring. One end of the air outlet pipe is connected to the air outlet of the pneumatic slip ring. An intermediate push plate is arranged between the outer cylinder and the inner cylinder. The intermediate push plate can move up and down relative to the outer cylinder and the inner cylinder. The other end of the air outlet pipe is communicated with the chamber on the lower side of the intermediate push plate.

9. The electromagnetic centrifugal casting system for magnetic particle enhanced alloy according to claim 1, wherein, Adjust the angle of the electromagnet and control the magnitude of the current according to the working requirements to achieve dynamic regulation of the magnetic field intensity and direction; the radioactive arrangement and angle adjustment function of the electromagnet can generate a composite force field to synergistically regulate the centrifugal force, electromagnetic force, buoyancy and gravity, offset the particle aggregation caused by the centrifugal force and the floating aggregation caused by the buoyancy, and ensure the three-dimensional ordered and uniform dispersion of magnetic nanoparticles in the alloy.

10. A magnetic particle enhanced alloy electromagnetic centrifugal casting system according to claim 9, characterized in that, The magnetic particle-reinforced alloy is a magnetic nanoparticle-reinforced alloy material such as graphene-coated iron oxide particles-reinforced aluminum-based alloy, graphene-coated iron oxide particles-reinforced copper-based alloy, or carbon nanotube-coated iron oxide particles-reinforced aluminum-based alloy, carbon nanotube-coated iron oxide particles-reinforced copper-based alloy, etc. The reinforced alloy material is a non-magnetic metal material.

11. A magnetic particle enhanced alloy electromagnetic centrifugal casting system according to claim 9, characterized in that, The electromagnet is connected to the electromagnet bracket through bolts and nuts. The electromagnet bracket is also connected to the hinge seat through bolts and nuts. The hinge seat is fixedly connected to the machine body shell through bolts. The electromagnet bracket can rotate flexibly around the hinge seat to adjust the angle of the electromagnet according to different working requirements; the PLC controller drives the frequency converter through program instructions and dynamically adjusts the input current of the electromagnet according to the type of non-magnetic metal to be cast to achieve adaptive control of the magnetic field intensity.

12. A magnetic particle enhanced alloy electromagnetic centrifugal casting system according to claim 9, characterized in that, The dynamic regulation of the magnetic field intensity is composed of a PLC controller, a frequency converter and a circular array of electromagnets. The circular array of electromagnets extends radially and uniformly in six columns with the axis of the large cylindrical barrel as the reference. Each column is evenly arranged in an array of 5 along the Z-axis, and the direction of the magnetic field forms an inclination angle of 0°-90° with the axis direction of the centrifugal casting mold, and is reasonably adjusted according to the requirements.

13. A working method of a magnetic particle enhanced alloy electromagnetic centrifugal casting system according to any one of claims 1-12, characterized in that, It includes the following steps: Adjust the direction and current magnitude of the electromagnet according to the type of non-magnetic metal to be cast; Inject the magnetic nanocomposite solution into the concentric cylindrical mold. After the pressure value reaches the standard, close the protective cover and evacuate; The driving device drives the concentric cylindrical mold to rotate, adjusts the rotation speed according to the alloy type, and completes centrifugal casting after a preset time; After casting is completed, ventilate the concentric cylindrical mold for demolding; Open the protective cover, take out the cast workpiece and place it at the designated position.

14. The working method according to claim 13, characterized in that, It includes: Dynamically monitor the temperature of the mold. When the temperature exceeds the preset value, turn on the cooling device until the temperature drops below the set value.

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