A mechanical energy-assisted thermal diffusion device

Abstract

A mechanically assisted thermal diffusion infiltration device includes an infiltration tank, a transmission mechanism, and a clamping mechanism. The infiltration tank is composed of two semi-circular tank bodies. The transmission mechanism consists of an input shaft, a support frame, an input gear, an intermediate gear A, an intermediate gear B, and an output gear. The total transmission ratio of the transmission mechanism is 0.2~0.33. The intermediate gear A meshes with both the input gear and the intermediate gear B simultaneously, and the output gear meshes with the intermediate gear B. The input gear is fixed on the input shaft, and the output gear passes through the input shaft and is fixed to the tank body. The clamping mechanism is fixed on the input shaft. The tank body contains projectiles and an infiltration agent. A heating plate is installed between the tank body and an insulation box. This invention utilizes the plastic deformation generated by the collision between the projectile and the workpiece to achieve nano-sized surface grains. By combining surface nano-sizing with the thermal diffusion infiltration process, it solves the bottleneck problem of poor thermal stability of nano-grains during the thermal diffusion infiltration process.

Description

Technical Field

[0001] This invention relates to the field of surface strengthening of metallic materials, and in particular to a mechanical energy-assisted thermal diffusion device. Background Technology

[0002] Defects and microcrystalline / nanostructures on the surface of metallic materials accelerate surface chemical reactions and diffusion processes, promoting the formation of surface coatings. Methods utilizing these factors to prepare coatings typically involve two steps: first, physical methods are used to alter the surface microstructure, forming microcrystalline / nanostructures with numerous defects; then, surface chemical thermal treatment is used to form a surface coating through the diffusion of active atoms. Zhang Wei et al., in their patent "A Low-Temperature Surface Carburizing Method for Titanium-Aluminum Based Intermetallic Compound Materials" (patent publication number: CN102409282A), employed a low-temperature carburizing technique for titanium-aluminum based intermetallic compound materials. Specifically, the surface of the metallic material was nanoscaled using conventional methods, followed by low-temperature carburizing at 500°C–800°C, resulting in a 4–9 μm thick carburized layer on the sample surface. However, nanostructured materials themselves face a problem—thermodynamic instability. Due to the extremely high interfacial volume percentage of nanomaterials, the large amount of excess free energy stored at the interface provides a very high driving force for grain growth. According to the Gibbs-Thomson equation, the driving force for grain growth is inversely proportional to the grain size. When the grain size is refined from the micrometer scale of traditional coarse-grained materials to the nanometer scale, the driving force for grain growth becomes very high. Many nanocrystalline materials even begin to grow grains at room temperature. Grain growth will cause nanomaterials to lose their unique microstructure and properties, such as diffusion properties. Studies have shown that chromium diffusion into hot-work die steel after nano-sizing pretreatment at different temperatures reveals that in the temperature range of 500-600 degrees Celsius, the thickness of the chromium-diffused layer increases with increasing temperature, reaching a maximum at 600 degrees Celsius. This is because higher temperatures favor element diffusion. However, from 600 to 700 degrees Celsius, the depth of the chromium-diffused layer decreases with increasing temperature. This is mainly because below 600 degrees Celsius, the non-equilibrium grain boundaries of the nanostructure dominate chromium diffusion, resulting in rapid diffusion. Above 600 degrees Celsius, as the grains coarsen, chromium diffusion gradually shifts from grain boundary diffusion to bulk diffusion, leading to a gradual decrease in diffusion performance. Above 700 degrees Celsius, grain coarsening is severe, and lattice diffusion becomes dominant. Therefore, nanomaterials consistently face the challenge of grain growth during thermal diffusion diffusion, and the thermal stability of the nanostructure surface is a key factor limiting the effectiveness of thermal diffusion diffusion.

[0003] To address the grain growth problem encountered during the thermal diffusion process of nanomaterials, inventor Chen Haifeng disclosed a mechanical energy-assisted nano-thermal diffusion device in his patent "A Mechanical Energy-Assisted Nanomaterial Thermal Diffusion Device" (Publication No.: CN202210029534.1). This device includes a diffusion tank, a planetary transmission mechanism, and a rotating shaft. The device is characterized by a left end cover, a tank body, and a right end cover. An internal gear ring and a baffle are provided on the inner surface of the tank. The left end cover is bolted to the input shaft, and the right end cover is connected to the support shaft via… The device uses bolted connections, with the input shaft connected to the motor. A heating plate is installed between the inner wall of the insulation box and the outer surface of the tank. The planetary transmission mechanism consists of planetary gears, planetary pins, a planetary carrier, and a sun gear. The planetary carrier is installed on the inner side of the left and right end covers, respectively. The planetary gears are mounted on the planetary carriers via planetary pins, and the sun gear is fixed on a rotating shaft with a boss. The workpiece is fixed on a workpiece clamping plate. The tank contains a penetrating agent and projectiles. When the penetrating tank rotates, a baffle causes the projectiles to fall from a height, impacting the workpiece surface and causing plastic deformation to form a nanolayer. However, in this patent, the planetary gears, planetary carrier, and sun gear of the planetary transmission mechanism are all movable. The sun gear can only rotate in the same direction as the planetary gears and the internal gear ring. The relative speed between the projectiles and the workpiece during collision is small, and the plastic deformation caused by the impact may not necessarily form a nanolayer. Summary of the Invention

[0004] The purpose of this invention is to propose a mechanical energy-assisted thermal diffusion device to solve the problem that the plastic deformation caused by the impact of a projectile colliding with a workpiece may not necessarily form a nanolayer due to the low relative velocity.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a mechanical energy-assisted heat diffusion infiltration device, comprising an infiltration tank, a transmission mechanism, and a clamping mechanism, characterized in that the infiltration tank is composed of two semi-circular tank bodies; the transmission mechanism consists of an input shaft, a support frame, an input gear, an intermediate gear A, an intermediate gear B, and an output gear, with a total transmission ratio of 0.2~0.33; the support frame consists of a left triangular plate, a right triangular plate, an intermediate shaft A, and an intermediate shaft B, with threads at both ends of the intermediate shaft A and intermediate shaft B; and the intermediate gear… A is fixed to intermediate shaft A by a key, and intermediate gear B is fixed to intermediate shaft B by a key. The support frame is mounted on the left cover plate, and the left cover plate is mounted on the insulation box. Intermediate gear A meshes with both the input gear and intermediate gear B, and the output gear meshes with intermediate gear B. The input gear is fixed to the input shaft, and the output gear passes through the input shaft and is fixed to the tank body via the left flange. The clamping mechanism is fixed to the input shaft. The tank body contains shot and penetrant. A heating plate is installed between the tank body and the insulation box. The linear velocity of the shot is 1.25~3.34 m / s. The radius r of the tank body is related to the linear velocity of the shot. Satisfy the formula The input shaft is connected to the left cover plate, the insulation box and the tank body respectively through bearings, and the inner surface of the tank body is provided with a liner.

[0006] Preferably, the intermediate gear A is positioned on both sides by bushing A, and the intermediate gear B is positioned on both sides by bushing B.

[0007] Preferably, the clamping mechanism consists of an annular ring, a fixed flange, and a clamping plate. The clamping plate is fixed to the annular ring by bolts, and the fixed flange is provided with threaded holes for installing tightening screws. The annular ring is fixed to the input shaft by the fixed flange.

[0008] Preferably, the input gear, intermediate gear A, intermediate gear B and output gear have the same module.

[0009] Preferably, the diameter of the projectile is 2-4 mm.

[0010] Preferably, the angle between the liner and the inner wall of the tank is 30° to 60°.

[0011] Preferably, the infiltrator is composed of pure metal powder or alloy powder, filler and catalyst, and the composition ratio of the infiltrator by weight percentage is: 50-70% pure metal powder or alloy powder, 20-49% filler and 1-10% catalyst.

[0012] Preferably, the metal powder is zinc powder, or aluminum powder, or copper powder, or manganese powder; the alloy powder is chromium-aluminum, or iron-zinc, or iron-aluminum, or aluminum-rare earth alloy; the filler is alumina or silicon oxide; the catalyst is chloride or fluoride; and the powder particle size is 100-300 mesh.

[0013] An assembly method for a mechanical energy-assisted heat diffusion device is as follows: First, install intermediate gear A on intermediate shaft A, positioning intermediate gear A using bushing A. Install intermediate gear B on intermediate shaft B, positioning intermediate gear B using bushing B. Pass the assembled intermediate shaft A and intermediate shaft B through the right triangular plate and secure them with a nut. Install the bearing bush on the left flange. After passing through the right triangular plate, secure the output gear on the left flange using a key. Second, secure the input gear on the input shaft using a key. Install the assembled output gear and left flange on the input shaft. Pass the input shaft, intermediate shaft A, and intermediate shaft B through the left triangular plate. Install bearing A on the input shaft. Secure the left triangular plate on the left cover plate using a nut. Third, install bearing B... Install the clamping plate on the input shaft, fix the clamping plate to the ring ring with bolts, install the ring ring on the fixed flange, install the fixed flange on the input shaft with tightening screws, install the workpiece on the clamping plate, and install the bearing and right flange assembly on the input shaft; Fourth step, put the shot and penetrant into the tank, install the input shaft assembled in the third step on the tank, combine the two semi-circular tanks together with bolts, and fix the left flange and right flange assembly on the penetrant tank with bolts; Fifth step, fix the heating plate to the inner wall of the insulation box, install the right bearing assembly on the input shaft, put the assembled input shaft and tank into the insulation box, assemble the two semi-circular insulation boxes into a whole with bolts, and fix the left cover plate, left bearing cover plate and right bearing assembly on the insulation box with bolts.

[0014] The beneficial effects of this invention are as follows: The transmission mechanism consists of an input shaft, a support frame, an input gear, intermediate gear A, intermediate gear B, and an output gear. Intermediate gear A meshes with both the input gear and intermediate gear B simultaneously, and the output gear meshes with intermediate gear B. The input gear is fixed to the input shaft, and the output gear passes through the input shaft and is fixed to the tank body via a left flange. According to the gear meshing principle, the input gear and output gear rotate in opposite directions, further causing the input shaft and the tank body to rotate in opposite directions. The projectile, driven by the tank body, undergoes circular motion. When the centrifugal force generated by the rotation is less than gravity, the projectile undergoes a throwing motion, colliding with the workpiece mounted on the input shaft. This forms a plastic deformation layer on the workpiece surface, refining the surface grains to the nanometer scale. This solves both the problem of insufficient diffusion channels for infiltrating elements in existing rolling thermal diffusion infiltration processes and the problem of the thermal stability of grains at high temperatures in surface nano-scale pretreatment methods. Furthermore, it enables the simultaneous nano-scale formation of the material surface and the element diffusion process, increasing the diffusion rate of elements and the thickness of the infiltrated layer. However, when the centrifugal force generated by rotation exceeds gravity, the projectile will not fall. Therefore, to ensure the projectile can successfully complete its projectile motion, according to the formulas for calculating centrifugal force and gravity, the radius r of the tank and the linear velocity of the projectile are... Satisfy the formula .

[0015] However, if the impact velocity of the shot is too low, it is difficult to produce sufficient plastic deformation on the workpiece surface, thus failing to achieve a nano-scale effect. If the impact velocity is too high, it can easily cause micro-cracks and other damage on the workpiece surface and subsurface, affecting the workpiece's service performance. Currently, commonly used methods for achieving surface nano-scale using shot impact include rotary peening, surface mechanical grinding, ultrasonic peening, and high-energy peening. Among these, the shot diameter used in surface mechanical grinding is 1~10 mm, the vibration frequency is 50~20 kHz, and the shot velocity is 5~20 m / s. In this application, the total transmission ratio of the transmission mechanism is 0.2~0.33, and according to the relationship between rotational speed and transmission ratio, the input rotational speed is 3~5 times the output rotational speed. Since the projectile and workpiece move in opposite directions, when the total transmission ratio of the transmission mechanism is 0.2, to achieve a relative impact velocity of 5~20 m / s, the linear velocity of the projectile can be set to 0.83~3.34 m / s; when the total transmission ratio of the transmission mechanism is 0.33, to achieve the same relative impact velocity, the linear velocity of the projectile can be set to 1.25~5 m / s. Furthermore, considering that the radius of the tank is proportional to the linear velocity of the projectile, the linear velocity of the projectile is set to 1.25~3.34 m / s. Moreover, when a larger relative impact velocity is required, a smaller transmission ratio can be selected to reduce the radius of the tank.

[0016] The support frame consists of a left triangular plate, a right triangular plate, intermediate shaft A, and intermediate shaft B. Intermediate shafts A and B have threads at both ends for easy installation of the transmission mechanism. The tank body and insulation box are composed of two semi-circular cross-section boxes, improving assembly convenience and efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the internal structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the transmission mechanism of the present invention.

[0019] Figure 3 This is a schematic diagram of the assembly of parts on the input shaft of the present invention.

[0020] Figure 4 This is a schematic diagram of the insulated box of the present invention.

[0021] Figure 5 This is a schematic diagram of the tank body of the present invention.

[0022] Figure 6 This is a schematic diagram of the input shaft of the present invention.

[0023] Figure 7 This is a schematic diagram of the left flange of the present invention.

[0024] Figure 8This is a schematic diagram of the clamping mechanism of the present invention.

[0025] Markings in the diagram: 1-Input shaft; 2-Left triangular plate; 3-Left cover plate; 4-Intermediate shaft B; 5-Intermediate gear B; 6-Right triangular plate; 7-Left flange; 8-Tank body; 9-Heating plate; 10-Annular ring; 11-Workpiece; 12-Fixed flange; 13-Right flange assembly; 14-Right bearing assembly; 15-Shot; 16-Insulation box; 17-Clamping plate; 18-Bearing B; 19-Output gear; 20-Intermediate shaft A; 21-Intermediate gear A; 22-Input gear; 23-Sleeve A; 24-Bearing A; 25-Left bearing cover plate; 26-Bearing bush; 27-Sleeve B. Detailed Implementation Example 1

[0026] The present invention will be further described below with reference to specific embodiments. See also: Figures 1-8 A mechanically assisted thermal diffusion infiltration device includes an infiltration tank, a transmission mechanism, and a clamping mechanism. The infiltration tank is composed of two semi-circular tank bodies 8. The transmission mechanism consists of an input shaft 1, a support frame, an input gear 22, an intermediate gear A21, an intermediate gear B5, and an output gear 19. The total transmission ratio of the transmission mechanism is 0.2. The support frame consists of a left triangular plate 2, a right triangular plate 6, an intermediate shaft A20, and an intermediate shaft B4. Both ends of the intermediate shafts A20 and B4 are threaded. The intermediate gear A21 is fixed to the intermediate shaft A20 by a key. The intermediate gear A21 is positioned on both sides by bushings A23. Gear B5 is fixed to intermediate shaft B4 by a key. The two sides of intermediate gear B5 are positioned by bushings B27. The support frame is mounted on the left cover plate 3, which is mounted on the insulation box 16. Intermediate gear A21 meshes with both input gear 22 and intermediate gear B5. Output gear 19 meshes with intermediate gear B5. Input gear 22 is fixed to input shaft 1. Output gear 19 passes through input shaft 1 and is fixed to tank body 8 via left flange 7. The clamping mechanism is fixed to input shaft 1. Tank body 8 contains projectile 15 and a penetrant. A heating plate 9 is placed between tank body 8 and insulation box 16. The linear velocity of projectile 15 is 1.25 m / s. The radius r of tank body 8 is related to the linear velocity of projectile 15. Satisfy the formula The radius of the tank is 0.5 m. The input shaft 1 is connected to the left cover plate 3, the insulation box 16 and the tank 8 respectively through bearings. The inner surface of the tank 8 is provided with a liner plate 8a.

[0027] The clamping mechanism consists of an annular ring 10, a fixed flange 12, and a clamping plate 17. The clamping plate 17 is fixed to the annular ring 10 by bolts. The fixed flange 12 is provided with threaded holes for installing tightening screws. The annular ring 10 is fixed to the input shaft 1 by the fixed flange 12.

[0028] The input gear 22, intermediate gear A21, intermediate gear B5 and output gear 19 have the same module.

[0029] The diameter of the projectile is 2 mm.

[0030] The angle between the liner 8a and the inner wall of the tank body 8 is 30°.

[0031] The infiltration agent is composed of pure metal powder, filler and catalyst. The composition ratio of the infiltration agent by weight percentage is: pure metal powder 40%, filler 57% and catalyst 3%.

[0032] The metal powder is aluminum or chromium powder, the filler is alumina, the catalyst is chloride, and the powder particle size is 100 mesh.

[0033] An assembly method for a mechanical energy-assisted heat diffusion device is as follows: First, install intermediate gear A21 on intermediate shaft A20, positioning intermediate gear A21 using bushing A23. Install intermediate gear B5 on intermediate shaft B4, positioning intermediate gear B5 using bushing B27. Pass the assembled intermediate shaft A20 and intermediate shaft B4 through right triangular plate 6 and secure them with a nut. Install bearing 26 on left flange 7, and after passing through right triangular plate 6, secure output gear 19 to left flange 7 using a key. Second, secure input gear 22 to input shaft 1 using a key. Install the assembled output gear 19 and left flange 7 onto input shaft 1. Pass input shaft 1, intermediate shaft A20, and intermediate shaft B4 through left triangular plate 2. Install bearing A24 on input shaft 1. Secure left triangular plate 2 to left cover plate 3 using a nut. Third, install bearing B18... On the input shaft 1, the clamping plate 17 is fixed to the ring 10 with bolts. The ring 10 is installed on the fixed flange 12. The fixed flange 12 is installed on the input shaft 1 with tightening screws. The workpiece 11 is installed on the clamping plate 17. The bearing and right flange assembly 13 are installed on the input shaft 1. In the fourth step, the shot 15 and the penetrant are put into the tank 8. The input shaft 1 assembled in the third step is installed on the tank 8. The two semi-circular tanks 8 are combined together with bolts. The left flange 7 and the right flange assembly 13 are fixed to the penetrant tank with bolts. In the fifth step, the heating plate 9 is fixed to the inner wall of the insulation box 16. The right bearing assembly 14 is installed on the input shaft 1. The assembled input shaft 1 and tank 8 are put into the insulation box 16. The two semi-circular insulation boxes 16 are assembled into a whole with bolts. The left cover plate 3, the left bearing cover plate 25 and the right bearing assembly 14 are fixed to the insulation box 16 with bolts.

[0034] The working principle is as follows: The motor drives the workpiece 1 and the diffusion tank to rotate in opposite directions through the input shaft 1 and the transmission mechanism. The uniformly arranged liner 8a inside the diffusion tank drives the shot 15 and the diffusion agent to move. When the diffusion tank rotates to a certain angle, the shot 15 and the diffusion agent make a throwing motion under the action of gravity and centrifugal force. The plastic deformation generated by the collision between the shot 15 and the workpiece 11 is used to realize the nano-sized grains on the surface of the workpiece 11. The surface nano-sized and thermal diffusion diffusion process are combined to solve the problem of insufficient diffusion channels for diffusion elements in the existing rolling thermal diffusion diffusion process, and to solve the problem of thermal stability of grains at high temperature in the surface nano-sized pretreatment method. Thus, the material surface nano-sized process and the element diffusion process are carried out simultaneously, which improves the diffusion rate of elements and increases the thickness of the diffusion layer. Example 2

[0035] The present invention will be further described below with reference to specific embodiments. See also: Figures 1-8 A mechanically assisted thermal diffusion infiltration device includes an infiltration tank, a transmission mechanism, and a clamping mechanism. The infiltration tank is composed of two semi-circular tank bodies 8. The transmission mechanism consists of an input shaft 1, a support frame, an input gear 22, an intermediate gear A21, an intermediate gear B5, and an output gear 19. The total transmission ratio of the transmission mechanism is 0.33. The support frame consists of a left triangular plate 2, a right triangular plate 6, an intermediate shaft A20, and an intermediate shaft B4. Both ends of the intermediate shafts A20 and B4 are threaded. The intermediate gear A21 is fixed to the intermediate shaft A20 by a key. The intermediate gear A21 is positioned on both sides by bushings A23. Gear B5 is fixed to intermediate shaft B4 by a key. The two sides of intermediate gear B5 are positioned by bushings B27. The support frame is mounted on the left cover plate 3, which is mounted on the insulation box 16. Intermediate gear A21 meshes with both input gear 22 and intermediate gear B5. Output gear 19 meshes with intermediate gear B5. Input gear 22 is fixed to input shaft 1. Output gear 19 passes through input shaft 1 and is fixed to tank body 8 via left flange 7. The clamping mechanism is fixed to input shaft 1. Tank body 8 contains projectile 15 and a penetrant. A heating plate 9 is placed between tank body 8 and insulation box 16. The linear velocity of projectile 15 is 3.34 m / s. The radius r of tank body 8 is related to the linear velocity of projectile 15. Satisfy the formula The radius of the tank is 1.2 m. The input shaft 1 is connected to the left cover plate 3, the insulation box 16 and the tank 8 respectively through bearings. The inner surface of the tank 8 is provided with a liner plate 8a.

[0036] The clamping mechanism consists of an annular ring 10, a fixed flange 12, and a clamping plate 17. The clamping plate 17 is fixed to the annular ring 10 by bolts. The fixed flange 12 is provided with threaded holes for installing tightening screws. The annular ring 10 is fixed to the input shaft 1 by the fixed flange 12.

[0037] The input gear 22, intermediate gear A21, intermediate gear B5 and output gear 19 have the same module.

[0038] The diameter of the projectile is 4 mm.

[0039] The angle between the liner 8a and the inner wall of the tank body 8 is 60°.

[0040] The infiltrator is composed of alloy powder, filler and catalyst. The composition ratio of the infiltrator by weight percentage is: alloy powder 75%, filler 20% and catalyst 5%.

[0041] The alloy powder is chromium-aluminum, the filler is alumina, the catalyst is chloride plus rare earth, and the powder particle size is 300 mesh.

[0042] An assembly method for a mechanical energy-assisted heat diffusion device is as follows: First, install intermediate gear A21 on intermediate shaft A20, positioning intermediate gear A21 using bushing A23. Install intermediate gear B5 on intermediate shaft B4, positioning intermediate gear B5 using bushing B27. Pass the assembled intermediate shaft A20 and intermediate shaft B4 through right triangular plate 6 and secure them with a nut. Install bearing 26 on left flange 7, and after passing through right triangular plate 6, secure output gear 19 to left flange 7 using a key. Second, secure input gear 22 to input shaft 1 using a key. Install the assembled output gear 19 and left flange 7 onto input shaft 1. Pass input shaft 1, intermediate shaft A20, and intermediate shaft B4 through left triangular plate 2. Install bearing A24 on input shaft 1. Secure left triangular plate 2 to left cover plate 3 using a nut. Third, install bearing B18... On the input shaft 1, the clamping plate 17 is fixed to the ring 10 with bolts. The ring 10 is installed on the fixed flange 12. The fixed flange 12 is installed on the input shaft 1 with tightening screws. The workpiece 11 is installed on the clamping plate 17. The bearing and right flange assembly 13 are installed on the input shaft 1. In the fourth step, the shot 15 and the penetrant are put into the tank 8. The input shaft 1 assembled in the third step is installed on the tank 8. The two semi-circular tanks 8 are combined together with bolts. The left flange 7 and the right flange assembly 13 are fixed to the penetrant tank with bolts. In the fifth step, the heating plate 9 is fixed to the inner wall of the insulation box 16. The right bearing assembly 14 is installed on the input shaft 1. The assembled input shaft 1 and tank 8 are put into the insulation box 16. The two semi-circular insulation boxes 16 are assembled into a whole with bolts. The left cover plate 3, the left bearing cover plate 25 and the right bearing assembly 14 are fixed to the insulation box 16 with bolts.

[0043] The working principle is as follows: The motor drives the workpiece 1 and the diffusion tank to rotate in opposite directions through the input shaft 1 and the transmission mechanism. The uniformly arranged liner 8a inside the diffusion tank drives the shot 15 and the diffusion agent to move. When the diffusion tank rotates to a certain angle, the shot 8 and the diffusion agent make a throwing motion under the action of gravity and centrifugal force. The plastic deformation generated by the collision between the shot 8 and the workpiece 11 realizes the nano-sized grains on the surface of the workpiece 11. The surface nano-sized and thermal diffusion diffusion process are combined, which not only solves the problem of insufficient diffusion channels for diffusion elements in the existing rolling thermal diffusion diffusion process, but also solves the problem of the thermal stability of grains at high temperature in the surface nano-sized pretreatment method. Thus, the material surface nano-sized process and the element diffusion process are carried out simultaneously, which improves the diffusion rate of elements and increases the thickness of the diffusion layer.

Claims

1. A mechanical energy assisted thermal diffusion apparatus comprising a diffusion pot, a drive mechanism and a clamping mechanism, characterized in that, The infiltration tank is combined by two semicircular tank bodies (8), the transmission mechanism is composed of an input shaft (1), a support frame, an input gear (22), an intermediate gear A (21), an intermediate gear B (5) and an output gear (19), the total transmission ratio of the transmission mechanism is 0.2-0.33, the support frame is composed of a left triangular plate (2), a right triangular plate (6), an intermediate shaft A (20) and an intermediate shaft B (4), the two ends of the intermediate shaft A (20) and the intermediate shaft B (4) are provided with threads, the intermediate gear A (21) is fixed on the intermediate shaft A (20) through a key, the intermediate gear B (5) is fixed on the intermediate shaft B (4) through a key, the support frame is installed on a left cover plate (3), the left cover plate (3) is installed on a heat preservation box (16), the intermediate gear A (21) is engaged with the input gear (22) and the intermediate gear B (5) at the same time, the output gear (19) is engaged with the intermediate gear B (5), the input gear (22) is fixed on the input shaft (1), the output gear (19) passes through the input shaft (1) and is fixed on the tank body (8) through a left flange (7), the clamping mechanism is fixed on the input shaft (1), the tank body (8) is provided with a projectile (15) and an infiltration agent, a heating plate (9) is arranged between the tank body (8) and the heat preservation box (16), the linear velocity of the projectile (15) is 1.25-3.34 m / s, the radius r of the tank body (8) and the linear velocity V of the projectile (15) satisfy the formula r >= V 2 / g, the input shaft (1) is connected with the left cover plate (3), the heat preservation box (16) and the tank body (8) through bearings respectively, and the inner surface of the tank body (8) is provided with a lining plate (8a).

2. A mechanical energy assisted thermal diffusion apparatus as claimed in claim 1, wherein, The intermediate gear A (21) is positioned by the shaft sleeve A (23) on both sides, and the intermediate gear B (5) is positioned by the shaft sleeve B (27) on both sides.

3. A mechanical energy assisted thermal diffusion apparatus as claimed in claim 1, wherein, The clamping mechanism is composed of a ring (10), a fixed flange (12) and a clamping plate (17), the clamping plate (17) is fixed on the ring (10) by bolts, the fixed flange (12) is provided with a threaded hole for mounting a jacking screw, and the ring (10) is fixed on the input shaft (1) through the fixed flange (12).

4. A mechanical energy assisted thermal diffusion apparatus as claimed in claim 1, wherein, The modulus of the input gear (22), the intermediate gear A (21), the intermediate gear B (5) and the output gear (19) are equal.

5. A mechanical energy assisted thermal diffusion apparatus as claimed in claim 1, wherein, The diameter of the projectile is 2-4 mm.

6. A mechanical energy assisted thermal diffusion apparatus as claimed in claim 1, wherein, The angle between the lining plate (8a) and the inner wall of the tank body (8) is 30-60 degrees.

7. A mechanical energy assisted thermal diffusion apparatus as claimed in claim 1, wherein, The infiltrant is composed of pure metal powder or alloy powder, filler and catalyst, and the component ratio of the infiltrant is as follows: pure metal powder or alloy powder 50-70%, filler 20-49% and catalyst 1-10% by weight percentage.

8. A mechanical energy assisted thermal diffusion apparatus as claimed in claim 7, wherein, The metal powder is zinc powder, or aluminum powder, or copper powder, or manganese powder, the alloy powder is chromium-aluminum, or iron-zinc, or iron-aluminum, or aluminum-rare earth alloy, the filler is aluminum oxide or silicon oxide, the catalyst is chloride or fluoride, and the particle size of the powder is 100-300 meshes.

9. A mechanical energy assisted thermal diffusion apparatus as claimed in claim 1, wherein, The assembling method is as follows: first, the intermediate gear A (21) is installed on the intermediate shaft A (20), the intermediate gear A (21) is positioned by the shaft sleeve A (23), the intermediate gear B (5) is installed on the intermediate shaft B (4), the intermediate gear B (5) is positioned by the shaft sleeve B (27), the assembled intermediate shaft A (20) and the intermediate shaft B (4) are passed through the right triangular plate (6), and the output gear (19) is fixedly installed on the left flange (7) by the key after being passed through the right triangular plate (6); second, the input gear (22) is fixedly installed on the input shaft (1) by the key, the assembled output gear (19) and the left flange (7) are installed on the input shaft (1), the input shaft (1), the intermediate shaft A (20) and the intermediate shaft B (4) are passed through the left triangular plate (2), the bearing A (24) is installed on the input shaft (1), and the left triangular plate (2) is installed on the left cover plate (3) by the nut; third, the bearing B (18) is installed on the input shaft (1), the clamping plate (17) is fixed on the annular ring (10) by the bolt, the annular ring (10) is installed on the fixed flange (12), the fixed flange (12) is installed on the input shaft (1) by the tightening screw, the workpiece (11) is installed on the clamping plate (17), and the bearing and the right flange assembly (13) are installed on the input shaft (1); fourth, the pellets (15) and the penetrating agent are put into the tank body (8), the input shaft (1) assembled in the third step is installed on the tank body (8), the two semicircular tank bodies (8) are combined together by the bolt, and the left flange (7) and the right flange assembly (13) are fixed on the penetrating tank by the bolt; fifth, the heating plate (9) is fixed on the inner wall of the heat preservation box (16), the right bearing assembly (14) is installed on the input shaft (1), the assembled input shaft (1) and the tank body (8) are put into the heat preservation box (16), the two semicircular heat preservation boxes (16) are assembled into a whole by the bolt, and the left cover plate (3), the left bearing cover plate (25) and the right bearing assembly (14) are fixed on the heat preservation box (16) by the bolt.

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