Heat treatment process of nickel-based superalloy casting

Abstract

The invention provides a heat treatment process of a nickel-based superalloy casting, which comprises the following operation steps: S1, placing the casting in a vacuum furnace, slowly heating the casting to 1000-1200 DEG C, keeping the casting at a solid solution temperature for 1-8 hours, and after heat preservation is finished, S2, cooling the casting in an air cooling manner, cooling the casting to 400-600 DEG C, keeping the casting at the temperature for 1-2 hours, and then cooling the casting to the temperature of 400-600 DEG C, and keeping the casting at the temperature of 400-600 DEG C for 1-2 hours, thereby obtaining the nickel-based superalloy casting. And S3, the casting obtained after solution treatment is heated to the temperature within the range of 600 DEG C to 1000 DEG C. According to the heat treatment technology of the nickel-based high-temperature alloy casting, after the casting is subjected to heat preservation for a period of time at a fixed temperature in solution treatment and aging treatment, the casting is cooled to a certain temperature, heat preservation is conducted for a period of time, and then the casting is cooled to the room temperature, so that the casting is cooled by stages, and the heat treatment efficiency of the nickel-based high-temperature alloy casting is improved. And thermal stress in the cooling process is reduced, and deformation and cracks are reduced.

Description

Technical Field

[0001] The present invention relates to the field of alloy manufacturing, and in particular to a heat treatment process for nickel-based high-temperature alloy castings. Background Art

[0002] An alloy refers to a solid product with metallic properties obtained by mixing and melting one metal with another or several metals or non-metals and then cooling and solidifying it. Nickel-based high-temperature alloy castings are high-temperature alloy castings with nickel as the matrix, which have high strength and good resistance to oxidation and gas corrosion in the range of 650-1000℃.

[0003] When nickel-based high-temperature alloy castings are now heat treated, the castings are subjected to solid solution treatment, aging treatment, and stress relief treatment to change the alloy's structure, thereby improving its mechanical properties, improving its processing performance, and enhancing its corrosion resistance, etc., to meet the material performance requirements of different engineering applications.

[0004] However, when heat treating castings in a vacuum furnace, the temperature is directly lowered to room temperature by air cooling, which results in excessive thermal stress due to rapid temperature changes in the initial heating stage, causing deformation or cracks in the castings and reducing product quality.

[0005] Therefore, it is necessary to provide a heat treatment process for nickel-based high-temperature alloy castings to solve the above technical problems. Summary of the Invention

[0006] The present invention provides a heat treatment process for nickel-based high-temperature alloy castings, which solves the problem that the castings are deformed or cracked due to excessive thermal stress generated by excessive temperature change in the initial heating stage when the castings are directly cooled to room temperature by air cooling.

[0007] To solve the above technical problems, the present invention provides a heat treatment process for nickel-based high-temperature alloy castings, comprising:

[0008] The steps are as follows:

[0009] S1. After the casting is placed in a vacuum furnace, it is slowly heated to 1000-1200°C and maintained at the solution temperature for 1-8 hours. After the insulation is completed;

[0010] S2. Cool the casting by air cooling to 400-600°C, keep it at this temperature for 1-2 hours, and then cool it to room temperature by air cooling;

[0011] S3. After solution treatment, the casting is heated to 600-1000°C, kept at the aging temperature for several hours to dozens of hours. After the aging is completed, air cooling is performed at 400-720°C, kept at this temperature for 1-2 hours, and then cooled to room temperature by air cooling.

[0012] S4. Stress relief treatment: Stress relief treatment is carried out between or after solution treatment and aging treatment. The casting is heated to about 500-700℃ and kept at this temperature for 2-6 hours. After the insulation is completed, it is air-cooled to room temperature.

[0013] Preferably, a mounting frame is fixedly mounted on one side of the vacuum furnace, and a loading component is provided on the top of the mounting frame.

[0014] Preferably, the loading component includes a moving device, multiple lifting members, a lifting plate, a second servo motor, a rotating frame, multiple support frames, multiple limit plates and a moving frame, the moving device is arranged inside the mounting frame, the moving frame is fixedly installed at the output end of the moving device, the moving device is used to push the moving frame to move, the multiple lifting members are fixedly installed on the top of the moving device, the lifting plate is fixedly installed at the output end of the multiple lifting members, the second servo motor is fixedly installed at the bottom of the lifting plate, the rotating frame is arranged at the output end of the second servo motor, the multiple support frames are respectively arranged on both sides of the rotating frame, and the multiple limit plates are respectively arranged on one side of the multiple support frames.

[0015] Preferably, the moving device includes a threaded rod, a first servo motor and a threaded block, the threaded rod is rotatably connected to the inside of the mounting bracket, the first servo motor is fixedly mounted on one end of the mounting bracket, and the output end is connected to one end of the first servo motor through a coupling, and the threaded block is threadedly connected to the surface of the threaded rod.

[0016] Preferably, a sliding assembly is provided inside the movable rack, and the sliding assembly includes two sliding grooves and two sliding rails. The two sliding grooves are both opened inside the movable rack, and the two sliding rails are respectively slidably connected to the inside of the two sliding grooves.

[0017] Preferably, an adjustment device is provided inside the support frame, and the adjustment device includes multiple adjustment slots, multiple adjustment rods and multiple first fixing members. The multiple adjustment slots are all opened inside the support frame, and the multiple adjustment rods are respectively slidably connected to the inside of the multiple adjustment slots, and the multiple first fixing members are all provided inside the support frame.

[0018] Preferably, the first fixing member includes a bolt and a threaded hole, the threaded hole is opened inside the support frame, and the bolt is threadedly connected to the inside of the threaded hole.

[0019] Preferably, a fixing device is provided inside the support frame, and the fixing device includes a plurality of fixing grooves, a plurality of fixing pins, a plurality of movable rods, a plurality of fixing springs, a connecting rod and a plurality of fixing holes, a plurality of the fixing grooves are opened inside the support frame, a plurality of the fixing pins are respectively slidably connected to the inside of the plurality of fixing grooves, one end of the plurality of movable rods is respectively fixedly connected to one end of the plurality of fixing pins, a plurality of the fixing springs are respectively sleeved on the surface of the plurality of movable rods, one end of the movable rod is fixedly connected to the surface of the connecting rod, a plurality of the fixing holes are opened inside the support frame and the adjusting rod, and a second fixing member is provided inside the connecting rod.

[0020] Preferably, the plurality of fixing springs are respectively located at one end of the plurality of fixing pins and are respectively located inside the plurality of fixing slots.

[0021] Preferably, a connecting plate is fixedly connected to one side of the limiting plate, and the multiple limiting plates on one side of the supporting frame are connected via the multiple connecting plates.

[0022] Compared with related technologies, the heat treatment process for nickel-based high-temperature alloy castings provided by the present invention has the following beneficial effects:

[0023] The present invention provides a heat treatment process for nickel-based high-temperature alloy castings. In the process of solution treatment and aging treatment, after the castings are kept at a fixed temperature for a period of time, the castings are cooled to a certain temperature, kept at this temperature for a period of time, and then cooled to room temperature. Thus, the castings are cooled in stages, thermal stress in the cooling process is reduced, and deformation and cracking are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic structural diagram of a first embodiment of a heat treatment process for a nickel-based high-temperature alloy casting provided by the present invention;

[0025] Figure 2 for Figure 1 A schematic structural diagram of the sliding assembly shown;

[0026] Figure 3 for Figure 2 An enlarged schematic diagram of part B is shown;

[0027] Figure 4 A schematic structural diagram of a second embodiment of a heat treatment process for a nickel-based high-temperature alloy casting provided by the present invention;

[0028] Figure 5 for Figure 4 An enlarged schematic diagram of part A is shown;

[0029] Figure 6A schematic structural diagram of a third embodiment of a heat treatment process for a nickel-based high-temperature alloy casting provided by the present invention;

[0030] Figure 7 for Figure 6 An enlarged schematic diagram of part C is shown.

[0031] Numbers in the figure: 1, vacuum furnace, 2, mounting frame,

[0032] 3. Loading component, 31. Moving device, 311. Threaded rod, 312. First servo motor, 313. Threaded block, 32. Lifting component, 33. Lifting plate, 34. Second servo motor, 35. Rotating frame, 36. Support frame, 37. Limiting plate, 38. Moving frame,

[0033] 4. Sliding assembly, 41. Sliding groove, 42. Sliding rail,

[0034] 5. Adjustment device, 51. Adjustment slot, 52. Adjustment rod, 53. First fixing member,

[0035] 6. Fixing device, 61. Fixing groove, 62. Fixing pin, 63. Moving rod, 64. Fixing spring, 65. Connecting rod, 66. Fixing hole, 7. Second fixing member, 8. Connecting plate. DETAILED DESCRIPTION

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0037] First embodiment

[0038] Please refer to Figure 1 、 Figure 2 and Figure 3 ,in, Figure 1 A schematic structural diagram of a first embodiment of a heat treatment process for a nickel-based high-temperature alloy casting provided by the present invention; Figure 2 for Figure 1 A schematic structural diagram of the sliding assembly shown; Figure 3 for Figure 2 A heat treatment process for a nickel-based high-temperature alloy casting includes:

[0039] The steps are as follows:

[0040] S1. After the casting is placed in the vacuum furnace 1, it is slowly heated to between 1000-1200°C and maintained at the solution temperature for 1-8 hours. After the insulation is completed;

[0041] S2. Cool the casting by air cooling to 400-600°C, keep it at this temperature for 1-2 hours, and then cool it to room temperature by air cooling;

[0042] S3. After solution treatment, the casting is heated to 600-1000°C, kept at the aging temperature for several hours to dozens of hours. After the aging is completed, air cooling is performed at 400-720°C, kept at this temperature for 1-2 hours, and then cooled to room temperature by air cooling.

[0043] S4. Stress relief treatment: Stress relief treatment is carried out between or after solution treatment and aging treatment. The casting is heated to about 500-700℃ and kept at this temperature for 2-6 hours. After the insulation is completed, it is air-cooled to room temperature.

[0044] For nickel-based high-temperature alloys, after heating, solution treatment and insulation, they are cooled by air cooling. The first stage treatment temperature is 400-600℃. After insulation for 1-2 hours, the cooling rate is usually controlled at 5-15℃ / min. At this stage, the casting temperature is high and the thermal stress is large. Slow cooling can make the temperature inside and outside the casting drop evenly, reduce the thermal stress caused by temperature difference, and avoid excessive deformation or cracks in the casting. In the second stage, the air cooling is controlled at 15-30℃ / min to room temperature, and the cooling rate can be slowly increased. The structure and stress state of the casting have been basically stable in the first stage.

[0045] During the aging treatment of nickel-based high-temperature alloys, air cooling is controlled at 50-56℃ / h in the first stage to cool the alloy to 400℃-720℃, so that the solute atoms in the alloy begin to gradually precipitate, forming fine strengthening phases, while avoiding excessive cooling to produce large internal stresses. After holding for 1-2 hours and then cooling to room temperature through air cooling, the alloy structure has undergone a certain transformation. The second stage of holding can further uniformly precipitate and grow the strengthening phases, and air cooling to room temperature is to stabilize the alloy structure and ultimately obtain ideal mechanical properties.

[0046] A mounting frame 2 is fixedly mounted on one side of the vacuum furnace 1 , and a loading component 3 is provided on the top of the mounting frame 2 .

[0047] The loading component 3 includes a moving device 31, multiple lifting members 32, a lifting plate 33, a second servo motor 34, a rotating frame 35, multiple support frames 36, multiple limit plates 37 and a moving frame 38. The moving device 31 is arranged inside the mounting frame 2, and the moving frame 38 is fixedly installed at the output end of the moving device 31. The moving device 31 is used to push the moving frame 38 to move. The multiple lifting members 32 are fixedly installed on the top of the moving device 31, the lifting plate 33 is fixedly installed at the output end of the multiple lifting members 32, the second servo motor 34 is fixedly installed at the bottom of the lifting plate 33, the rotating frame 35 is arranged at the output end of the second servo motor 34, the multiple support frames 36 are respectively arranged on both sides of the rotating frame 35, and the multiple limit plates 37 are respectively arranged on one side of the multiple support frames 36.

[0048] The lifting member 32 is a hydraulic rod or a cylinder, which is used to push the lifting plate 33 to move.

[0049] The rotating frame 35 is rotatably connected to the top of the lifting plate 33 , and the output end of the second servo motor 34 is connected to the bottom of the rotating frame 35 through a coupling, so as to drive the rotating frame 35 to rotate to one side after the second servo motor 34 is started.

[0050] The plurality of limiting plates 37 are used to limit the casting storage rack placed on the support frame 36 , thereby increasing the stability of the storage rack when the support frame 36 rotates.

[0051] The moving device 31 is a linear sliding module, and the moving frame 38 is fixedly installed at the output end of the linear sliding module, and is used to drive the moving frame 38 to move through the linear sliding module.

[0052] The moving device 31 includes a threaded rod 311, a first servo motor 312 and a threaded block 313. The threaded rod 311 is rotatably connected to the inside of the mounting bracket 2. The first servo motor 312 is fixedly installed at one end of the mounting bracket 2, and the output end is connected to one end of the first servo motor 312 through a coupling. The threaded block 313 is threadedly connected to the surface of the threaded rod 311.

[0053] The top of the threaded block 313 is fixedly connected to the top of the movable frame 38, and is used to drive the threaded rod 311 to rotate to one side after starting the first servo motor 312, so that the threaded block 313 moves to one side on the surface of the threaded rod 311, thereby driving the movable frame 38 to move to one side.

[0054] A sliding assembly 4 is provided inside the movable frame 38 , and the sliding assembly 4 includes two sliding grooves 41 and two sliding rails 42 . The two sliding grooves 41 are both opened inside the movable frame 28 , and the two sliding rails 42 are respectively slidably connected to the inside of the two sliding grooves 41 .

[0055] When loading the castings, the moving frame 38 is moved to one side by starting the moving device 31, so that the support frame 36 moves into the interior of the vacuum furnace 1, and the lifting plate 33 is driven upward by the lifting member 32 to drive the lifting plate 33, so that the rotating frame 35 connected to multiple support frames 36 moves upward, and after the storage rack is lifted, the moving frame 38 is driven to reset by the moving device 31.

[0056] After starting the second servo motor 34 to drive the rotating frame 35 to rotate slowly to one side, thereby driving multiple support frames 36 to rotate to one side, so that the support frames 36 on both sides of the rotating frame 35 are exchanged, the storage rack storing the castings that have not been heat treated is moved to one side by the moving device 31. After that, it is retracted and reset by starting the lifting member 32, and then reset by starting the moving device 31, so that the loading and unloading of castings can be switched quickly, thereby increasing work efficiency.

[0057] The bottoms of the two slide rails 42 are fixedly connected to both sides of the top of the mounting frame 2, and are used to drive the two slide slots 41 to move to one side when the movable frame 38 moves to one side, thereby increasing the stability of the movable frame 38 when moving.

[0058] The working principle of the heat treatment process of a nickel-based high-temperature alloy casting provided by the present invention is as follows:

[0059] When in use, after the casting is placed inside the vacuum furnace 1, the casting is slowly heated to between 1000-1200°C and maintained at the solution temperature for 1-8 hours. After the insulation is completed;

[0060] Cool the casting by air cooling to 400-600℃, keep it at this temperature for 1-2 hours, and then cool it to room temperature by air cooling.

[0061] After solution treatment, the casting is heated to 600-1000℃, kept at aging temperature for several hours to dozens of hours, and after aging, air-cooled to 400-720℃, kept at this temperature for 1-2 hours, and then cooled to room temperature by air cooling.

[0062] Stress relief treatment: Stress relief treatment is carried out between or after solution treatment and aging treatment. The casting is heated to about 500-700℃ and kept at this temperature for 2-6 hours. After the insulation is completed, it is air-cooled to room temperature.

[0063] Compared with related technologies, the heat treatment process for nickel-based high-temperature alloy castings provided by the present invention has the following beneficial effects:

[0064] The present invention provides a heat treatment process for nickel-based high-temperature alloy castings. In the process of solution treatment and aging treatment, after the castings are kept at a fixed temperature for a period of time, the castings are cooled to a certain temperature, kept at this temperature for a period of time, and then cooled to room temperature. Thus, the castings are cooled in stages, thermal stress in the cooling process is reduced, and deformation and cracking are reduced.

[0065] Second embodiment

[0066] Please refer to Figure 4 and Figure 5 Based on the heat treatment process for nickel-based superalloy castings provided in the first embodiment of this application, the second embodiment of this application provides another heat treatment process for nickel-based superalloy castings. The second embodiment is merely a preferred embodiment of the first embodiment, and implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0067] Specifically, the difference of the heat treatment process of a nickel-based high-temperature alloy casting provided in the second embodiment of the present application is that, in a heat treatment process of a nickel-based high-temperature alloy casting, an adjustment device 5 is provided inside the support frame 36, and the adjustment device 5 includes a plurality of adjustment grooves 51, a plurality of adjustment rods 52 and a plurality of first fixing members 53, and the plurality of adjustment grooves 51 are all opened inside the support frame 36, and the plurality of adjustment rods 52 are respectively slidably connected to the interior of the plurality of adjustment grooves 51, and the plurality of first fixing members 53 are all provided inside the support frame 36.

[0068] One end of the plurality of adjustment rods 52 is fixedly connected to one side of the plurality of limiting plates 37 .

[0069] The first fixing member 53 includes a bolt and a threaded hole. The threaded hole is opened inside the support frame 36 , and the bolt is threadedly connected to the inside of the threaded hole.

[0070] A plurality of threaded holes are provided inside the adjusting rod 52 for limiting the position of the adjusting rod 52 after the adjusting rod 52 is moved to a suitable position and bolts are installed inside the threaded holes.

[0071] The working principle of the heat treatment process of a nickel-based high-temperature alloy casting provided by the present invention is as follows:

[0072] During use, after removing the first fixing member 53, the limit plate 37 is moved to one side to drive the adjustment rod 52 to move to one side inside the adjustment slot 51. When the limit plate 37 moves to the appropriate position, the first fixing member 53 can be installed.

[0073] Compared with related technologies, the heat treatment process for nickel-based high-temperature alloy castings provided by the present invention has the following beneficial effects:

[0074] The present invention provides a heat treatment process for nickel-based high-temperature alloy castings, wherein the interior of the limiting plate 37 is adjusted by the adjusting device 5, thereby facilitating the limiting plate 37 to limit storage racks of different widths.

[0075] Third embodiment

[0076] Please refer to Figure 6 and Figure 7 Based on the heat treatment process for nickel-based superalloy castings provided in the first embodiment of this application, the third embodiment of this application provides another heat treatment process for nickel-based superalloy castings. The third embodiment is merely a preferred embodiment of the first embodiment, and implementation of the third embodiment will not affect the implementation of the first embodiment alone.

[0077] Specifically, the difference of the heat treatment process of a nickel-based high-temperature alloy casting provided in the third embodiment of the present application is that, in a heat treatment process of a nickel-based high-temperature alloy casting, a fixing device 6 is provided inside the support frame 36, and the fixing device 6 includes a plurality of fixing grooves 61, a plurality of fixing pins 62, a plurality of moving rods 63, a plurality of fixing springs 64, a connecting rod 65 and a plurality of fixing holes 66, and the plurality of fixing grooves 61 are all opened inside the support frame 36, and the plurality of fixing pins 62 are respectively slidably connected to the interior of the plurality of fixing grooves 61, and one end of the plurality of moving rods 63 is respectively fixedly connected to one end of the plurality of fixing pins 62, and the plurality of fixing springs 64 are respectively sleeved on the surface of the plurality of moving rods 63, and one end of the moving rod 63 is fixedly connected to the surface of the connecting rod 65, and the plurality of fixing holes 66 are opened inside the support frame 36 and the adjusting rod 52, and the interior of the connecting rod 65 is provided with a second fixing member 7.

[0078] One end of each of the plurality of moving rods 63 is fixedly connected to the top of a connecting rod 65 , so that when the connecting rod 65 is moved, the plurality of moving rods 63 are simultaneously driven to move.

[0079] The second fixing member 7 has the same structure as the first fixing member 53 . Threaded holes are provided inside the connecting rod 65 and the support frame 36 for limiting the position of the connecting rod 65 after bolts are installed inside the threaded holes.

[0080] A plurality of fixing holes 66 adapted to the fixing pins 62 are provided inside the adjusting rod 52 , so as to limit the adjusting rod 52 after the adjusting rod 52 moves to a suitable position and the fixing pins 62 enter the fixing holes 66 .

[0081] The fixing springs 64 are respectively located at one end of the fixing pins 62 and inside the fixing slots 61 .

[0082] A connecting plate 8 is fixedly connected to one side of the limiting plate 37 , and the multiple limiting plates 37 on one side of the supporting frame 36 are connected via the multiple connecting plates 8 .

[0083] When one limiting plate 37 is pulled to one side, the other limiting plates 37 are connected via the connecting plate 8 and move together.

[0084] The working principle of the heat treatment process of a nickel-based high-temperature alloy casting provided by the present invention is as follows:

[0085] When in use, the connecting rod 65 is moved downward to drive the multiple moving rods 63 connected to the multiple fixing pins 62 to move downward inside the multiple fixing grooves 61, while squeezing the multiple fixing springs 64 respectively, and when the multiple fixing pins 62 are separated from the multiple fixing holes 66 respectively.

[0086] The limit plate 37 is moved to one side, driving the connecting plate 8 connected to another limit plate 37 to move to one side, thereby driving the multiple adjustment rods 52 to move to the appropriate positions inside the multiple adjustment slots 51. After the connecting rod 65 is loosened, the multiple fixing springs 46 push the multiple fixing pins 62 to move upward inside the multiple fixing slots 61. When the multiple fixing pins 62 enter the inside of the multiple fixing holes 66 respectively, the multiple adjustment rods 52 are limited.

[0087] Compared with related technologies, the heat treatment process for nickel-based high-temperature alloy castings provided by the present invention has the following beneficial effects:

[0088] The present invention provides a heat treatment process for nickel-based high-temperature alloy castings, wherein the adjusting rod 52 is limited by the fixing device 6 and the connecting plate 8, thereby facilitating the limiting of the adjusting rod 52 after it is moved to a suitable position.

[0089] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A heat treatment process for nickel-based high-temperature alloy castings, characterized in that: include: The steps are as follows: S1. After the casting is placed in a vacuum furnace, it is slowly heated to 1000-1200°C and maintained at the solution temperature for 1-8 hours. After the insulation is completed; S2. Cool the casting by air cooling to 400-600°C, keep it at this temperature for 1-2 hours, and then cool it to room temperature by air cooling; S3. After solution treatment, the casting is heated to 600-1000°C, kept at the aging temperature for several hours to dozens of hours. After the aging is completed, air cooling is performed at 400-720°C, kept at this temperature for 1-2 hours, and then cooled to room temperature by air cooling. S4. Stress relief treatment: Stress relief treatment is carried out between or after solution treatment and aging treatment. The casting is heated to about 500-700℃ and kept at this temperature for 2-6 hours. After the insulation is completed, it is air-cooled to room temperature.

2. The heat treatment process for a nickel-based high-temperature alloy casting according to claim 1, characterized in that: A mounting frame is fixedly mounted on one side of the vacuum furnace, and a loading component is provided on the top of the mounting frame.

3. The heat treatment process for a nickel-based high-temperature alloy casting according to claim 2, characterized in that: The loading component includes a moving device, multiple lifting members, a lifting plate, a second servo motor, a rotating frame, multiple support frames, multiple limit plates and a moving frame. The moving device is arranged inside the mounting frame, and the moving frame is fixedly installed at the output end of the moving device. The moving device is used to push the moving frame to move. The multiple lifting members are fixedly installed on the top of the moving device, the lifting plate is fixedly installed at the output end of the multiple lifting members, the second servo motor is fixedly installed at the bottom of the lifting plate, the rotating frame is arranged at the output end of the second servo motor, the multiple support frames are respectively arranged on both sides of the rotating frame, and the multiple limit plates are respectively arranged on one side of the multiple support frames.

4. The heat treatment process for nickel-based high-temperature alloy castings according to claim 3, characterized in that: The moving device includes a threaded rod, a first servo motor and a threaded block. The threaded rod is rotatably connected to the inside of the mounting frame. The first servo motor is fixedly installed at one end of the mounting frame, and the output end is connected to one end of the first servo motor through a coupling. The threaded block is threadedly connected to the surface of the threaded rod.

5. The heat treatment process for nickel-based high-temperature alloy castings according to claim 3, characterized in that: A sliding assembly is provided inside the movable frame. The sliding assembly includes two sliding grooves and two sliding rails. The two sliding grooves are both opened inside the movable frame. The two sliding rails are respectively slidably connected to the inside of the two sliding grooves.

6. The heat treatment process for nickel-based high-temperature alloy castings according to claim 3, characterized in that: An adjustment device is provided inside the support frame, and the adjustment device includes multiple adjustment slots, multiple adjustment rods and multiple first fixing parts. The multiple adjustment slots are all opened inside the support frame, and the multiple adjustment rods are respectively slidably connected to the inside of the multiple adjustment slots, and the multiple first fixing parts are all provided inside the support frame.

7. The heat treatment process for nickel-based high-temperature alloy castings according to claim 6, characterized in that: The first fixing member includes a bolt and a threaded hole. The threaded hole is opened inside the support frame, and the bolt is threadedly connected to the inside of the threaded hole.

8. The heat treatment process for nickel-based high-temperature alloy castings according to claim 3, characterized in that: A fixing device is provided inside the support frame, and the fixing device includes multiple fixing grooves, multiple fixing pins, multiple moving rods, multiple fixing springs, a connecting rod and multiple fixing holes. Multiple fixing grooves are opened inside the support frame, multiple fixing pins are respectively slidably connected to the inside of the multiple fixing grooves, one end of the multiple moving rods is respectively fixedly connected to one end of the multiple fixing pins, multiple fixing springs are respectively sleeved on the surface of the multiple moving rods, one end of the moving rod is fixedly connected to the surface of the connecting rod, multiple fixing holes are opened inside the support frame and the adjusting rod, and a second fixing piece is provided inside the connecting rod.

9. The heat treatment process for nickel-based high-temperature alloy castings according to claim 8, characterized in that: The plurality of fixing springs are respectively located at one end of the plurality of fixing pins and are respectively located inside the plurality of fixing slots.

10. The heat treatment process for nickel-based high-temperature alloy castings according to claim 3, characterized in that: A connecting plate is fixedly connected to one side of the limiting plate, and the multiple limiting plates on one side of the supporting frame are connected via the multiple connecting plates.

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