Nickel-based alloy annealing device

Abstract

The invention belongs to the technical field of nickel-based alloy heat treatment, and particularly relates to a nickel-based alloy annealing device which comprises an annealing furnace and an annealing tray, the annealing furnace comprises a furnace shell, a furnace cover is arranged at the top of the furnace shell, and heating devices are uniformly arranged on the inner wall of an annealing chamber in the furnace shell; an atmosphere circulating machine body is arranged on the outer side of the furnace shell, a gas outlet cavity is formed in the furnace cover, a recovery cavity is formed in the inner wall of the bottom of the annealing chamber, and the gas outlet cavity, the recovery cavity and a circulating fan in the atmosphere circulating machine body are communicated to realize circular flow of protective atmosphere; the protective atmosphere is fed, so that the heated protective atmosphere is in downward contact with and penetrates through gaps between the wires, protective atmosphere airflow permeating into the gaps between the wires serves as a medium, heat is better transferred to the wires close to the inner side, the wires close to the inner side are fully heated, and therefore the temperature difference of the wires at different positions is reduced; and the heat treatment quality of the nickel-based alloy wire is ensured.

Description

Technical Field

[0001] This invention belongs to the field of nickel-based alloy heat treatment technology, specifically a nickel-based alloy annealing apparatus. Background Technology

[0002] Nickel-based alloys are a class of alloys that possess high strength and certain resistance to oxidation and corrosion at high temperatures of 650–1000℃. Based on their main properties, they are further subdivided into nickel-based heat-resistant alloys, nickel-based corrosion-resistant alloys, nickel-based wear-resistant alloys, nickel-based precision alloys, and nickel-based shape memory alloys. High-temperature alloys are classified according to their matrix: iron-based high-temperature alloys, nickel-based high-temperature alloys, and cobalt-based high-temperature alloys. Nickel-based high-temperature alloys are simply referred to as nickel-based alloys.

[0003] Nickel-based alloy wires, containing a high proportion of elements such as Ni, Cr, and Mo, have excellent high-temperature strength and corrosion resistance. However, they are prone to work hardening (dislocation accumulation and internal stress concentration) during processing and need to be annealed in a pit-type annealing furnace to restore plasticity, refine the microstructure, and eliminate internal stress.

[0004] In this process, in order to reduce volume, the wire is usually wound into a coil or placed on a spool and then placed inside the annealing furnace for heat treatment. During this process, the inner part of the coiled wire is far from the heating position, and the wires are mutually shielded and do not easily come into contact with the protective atmosphere, resulting in limited heating and uneven overall temperature of the wire, which affects the heat treatment effect. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies and solve the aforementioned technical problems, this invention proposes a nickel-based alloy annealing apparatus.

[0006] The technical solution adopted by the present invention to solve its technical problem is as follows: The present invention proposes a nickel-based alloy annealing device, including an annealing furnace and an annealing tray. The annealing furnace includes a furnace shell, a furnace cover is provided on the top of the furnace shell, and heating devices are uniformly arranged on the inner wall of the annealing chamber inside the furnace shell. An atmosphere circulation unit is installed on the outside of the furnace shell, an exhaust chamber is installed on the furnace cover, and a recovery chamber is installed on the bottom inner wall of the annealing chamber. The exhaust chamber, the recovery chamber and the circulating fan inside the atmosphere circulation unit are connected to achieve the circulation of the protective atmosphere. The annealing tray includes fixed discs on the upper and lower sides and a fixed shaft in the middle. The nickel-based alloy wire to be processed is fixedly wound on the outer surface of the fixed shaft. An installation shaft is fixedly installed in the middle of the annealing chamber. The installation shaft passes through the fixing hole in the middle of the fixing disc and limits and fixes the annealing material tray. The installation shaft is a tubular structure, and the top of the installation shaft is connected to the gas outlet chamber. The part of the installation shaft located inside the fixing shaft is evenly provided with gas guide holes. The fixing disc is evenly provided with flow guide holes. The side wall of the fixing shaft is evenly provided with through holes. A limiting tube is provided at the opening of the through hole. The limiting tube extends laterally and passes through the gap between the wires wound on the outside of the fixed shaft. The side wall of the limiting tube is evenly provided with dispersion holes. The limiting tube communicates with the internal area of ​​the fixed shaft.

[0007] Preferably, the middle part of the fixed disc near the upper side of the annealing tray is provided with an opening that communicates with the hollow part inside the fixed shaft, while the middle part of the fixed disc near the lower side remains closed and slides in contact with the mounting shaft.

[0008] Preferably, an air guide ring is provided on the outer surface of the fixed disc near the upper side of the annealing tray, and the outer edge of the air guide ring extends horizontally and is close to the inner wall of the annealing chamber.

[0009] Preferably, the limiting tube has a tapered tube structure, and the end of the limiting tube near the fixed shaft is the larger end. The outer surface of the limiting tube is uniformly provided with annular protrusions, and the dispersion holes are concentrated on the surface of the annular protrusions.

[0010] Preferably, a layered rod is provided between adjacent limiting tubes, and the layered rod is vertically arranged and arranged in a ring around the central axis of the fixed axis.

[0011] Preferably, the layering rod is a tubular structure and communicates with the interior of the limiting tube. The outer surface of the layering rod is uniformly provided with annular grooves, and the inner wall of the annular grooves is uniformly provided with transmission holes, which communicate with the internal area of ​​the layering rod.

[0012] Preferably, the layered rod and the limiting tube are rotatably connected, and the cross-section of the layered rod is elliptical.

[0013] The beneficial effects of this invention are as follows: The nickel-based alloy annealing apparatus of this invention introduces a protective atmosphere at regular intervals. Heating elements can also be arranged on the inner wall of the outlet chamber to heat the incoming protective atmosphere before releasing it downwards to flush the wire inside the annealing chamber. This allows the heated protective atmosphere to contact and penetrate the gaps between the wires. Using the protective atmosphere flow that has penetrated the gaps between the wires as a medium, heat is better transferred to the wires near the inner side, ensuring that the wires near the inner side are fully heated. This reduces the temperature difference between different locations of the wires and ensures the heat treatment quality of the nickel-based alloy wires. Attached Figure Description

[0014] The invention will now be further described with reference to the accompanying drawings.

[0015] Figure 1This is a perspective view of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a perspective view of the annealing tray in this invention; Figure 4 This is a cross-sectional view of the annealing tray in this invention; Figure 5 yes Figure 4 A magnified view of a section at point A in the middle; Figure 6 This is a cross-sectional view of the layered rod in this invention.

[0016] In the diagram: Annealing furnace 1, furnace shell 11, furnace cover 12, gas outlet chamber 121, annealing chamber 13, recovery chamber 131, mounting shaft 14, gas guide hole 141, annealing material tray 2, fixed disc 21, fixed hole 211, flow guide hole 212, fixed shaft 22, through hole 221, gas guide ring 23, limiting tube 24, dispersion hole 241, annular protrusion 242, layering rod 25, annular groove 251, and transfer hole 252. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Example 1: As shown in the attached diagram of the instruction manual. Figures 1-6 As shown, this application proposes a nickel-based alloy annealing apparatus, including an annealing furnace 1 and an annealing tray 2. The nickel-based alloy wire to be processed is fixed on the outer surface of the annealing tray 2 and undergoes annealing treatment inside the annealing furnace 1. The annealing furnace 1 includes a furnace shell 11, with a furnace cover 12 on the top of the furnace shell 11. Heating devices are uniformly arranged on the inner wall of the annealing chamber 13 inside the furnace shell 11. The outer side of the furnace shell 11 is a metal structure, which serves as a support and fixation function, and the inner side is provided with a heat insulation layer to prevent internal heat from being transferred outward. The heating devices are controlled by an existing intelligent temperature control system. The resistance wire, as a heating element, penetrates the inner wall of the heat insulation layer and surrounds the annealing chamber 13 in the middle. It is started under the control of an external temperature control system, and the temperature changes are monitored in real time by a temperature sensor, and corresponding adjustments are made. An atmosphere circulation unit is provided on the outside of the furnace shell 11, an exhaust chamber 121 is provided on the furnace cover 12, and a recovery chamber 131 is provided on the bottom inner wall of the annealing chamber 13. The exhaust chamber 121 and the recovery chamber 131 are respectively connected to the inside of the annealing chamber 13. The exhaust chamber 121, the recovery chamber 131 and the circulating fan inside the atmosphere circulation unit are connected to realize the circulation flow of the protective atmosphere. In addition, inside the atmosphere circulation unit, at the junction of the air inlet of the circulating fan and the recovery chamber 131, a filter, a deoxidizer and other purification devices are respectively provided to filter and separate the impurities contained in the recovered protective atmosphere gas and any residual oxygen, so as to prevent these impurities from coming into contact with the wire again during the annealing process and affecting the surface quality of the wire. The annealing tray 2 includes upper and lower fixed discs 21 and a middle fixed shaft 22, all made of carbon steel. The fixed shaft 22 is hollow inside, forming a cylindrical structure. Wire is wound around the outer surface of the fixed shaft 22, and a mounting shaft 14 is provided in the middle of the annealing chamber 13. The mounting shaft 14 passes through the fixing hole 211 in the middle of the fixed tray and limits and fixes the annealing tray 2. The mounting shaft 14 has a tubular structure, and the top of the mounting shaft 14 communicates with the gas outlet chamber 121. The mounting shaft 14 is located inside the fixed shaft 22 and has evenly distributed gas guide holes 141. The furnace cover 12 is uniformly provided with guide holes 212, and the side wall of the fixed shaft 22 is uniformly provided with through holes 221. The furnace cover 12 is opened by a drive structure installed on the outside of the furnace shell 11. The drive structure includes a motor and a telescopic device, which drives the furnace cover 12 to rotate horizontally and move vertically. When it needs to be closed, the drive structure drives the furnace cover 12 to rotate to the upper side of the top opening of the furnace shell 11, and then moves vertically downward, closing the top opening of the furnace shell 11. At the same time, the bottom of the furnace cover 12 is engaged with the mounting shaft 14, and the top of the mounting shaft 14 slides into the gas outlet chamber 121 to achieve communication.

[0019] Specific workflow: For nickel-based alloy wires, annealing can address issues such as dislocation accumulation and internal stress concentration that may occur during processing. This is mainly achieved by placing the wires in annealing furnace 1 and using recrystallization annealing to restore the wires' plasticity, refine the internal structure, eliminate internal stress, and improve the wires' mechanical properties. Specifically, the wire is first pretreated by pickling or other methods to remove impurities such as oxide scale and oil that may adhere to the surface of the wire. Then, the treated wire is wound around the fixed shaft 22 of the annealing tray 2 to form a stacked coil structure. The annealing tray 2 is then lifted by a hoisting device so that the end of the mounting shaft 14 inside the annealing chamber 13 is aligned with the fixing hole 211 in the middle of the annealing tray 2. In this way, the annealing tray 2 carries the wire into the annealing chamber 13 while the fixing hole 211 and the mounting shaft 14 slide relative to each other, ensuring that the annealing tray 2 enters or leaves the annealing chamber 13 along a stable moving trajectory, and avoiding collisions during loading and unloading that could damage the annealing tray 2 and the wire. Based on the relative height of the annealing chamber 13 and the annealing tray 2, multiple annealing trays 2 can be sequentially fed into the annealing chamber 13, stacked vertically along the mounting shaft 14. Then, the furnace cover 12 is closed, so that the bottom of the furnace cover 12 is combined with the top of the mounting shaft 14, thereby limiting the fixed shaft 22 and the annealing trays 2 and wire nested on the fixed shaft 22. The circulating fan is started to extract the air inside the annealing chamber 13, while protective gas is introduced to form a protective atmosphere, replacing the air containing oxygen and moisture inside the annealing chamber 13, so that the wire can be annealed in an environment surrounded by a protective atmosphere. The heating device located on the inner wall of the annealing chamber 13 is activated to raise the internal temperature of the annealing chamber 13 and heat the wire. This allows the wire to transition between low-temperature, medium-temperature, and high-temperature stages. Slow heating avoids thermal stress concentration and ensures uniform transformation of the wire's internal structure. After reaching the predetermined temperature, heating is stopped, and the wire is held at that temperature for a period of time, the specific holding time of which is determined based on the diameter of the wire. During the holding stage, recrystallization is completed inside the wire, refining and homogenizing the grains. After the holding stage, a slow cooling stage begins. To avoid deformation and cracking of the wire due to cooling stress caused by excessively rapid cooling, the heating device can be turned off, allowing the annealing chamber 13 to begin natural cooling. Extending the cooling time ensures the heat treatment quality of the wire. Finally, after complete cooling, the furnace cover 12 is opened, the annealing tray 2 is lifted out, and the quality of the wire wound inside is inspected to determine if it is qualified. During the above process, because the wires are intertwined and stacked on the fixed shaft 22, the wires near the inner side of the fixed shaft 22 may not be heated sufficiently due to multiple shielding, resulting in uneven temperature on the wires. Therefore, this application introduces a protective atmosphere at regular intervals, and heating elements can also be arranged on the inner wall of the outlet chamber 121 to heat the incoming protective atmosphere before releasing it downwards to flush the wires inside the annealing chamber 13. This allows the heated protective atmosphere to contact and penetrate the gaps between the wires, and the protective atmosphere airflow that penetrates into the gaps between the wires serves as a medium to better transfer heat to the wires near the inner side, so that the wires near the inner side are fully heated, thereby reducing the temperature difference of the wires at different locations. Furthermore, to improve the diffusion efficiency of the protective atmosphere, an outlet chamber 121 and a recovery chamber 131 are respectively located on the upper and lower sides of the annealing chamber 13. The protective atmosphere flows out of the outlet chamber 121 and is drawn into the recovery chamber 131, so that the protective atmosphere flows vertically inside the annealing chamber 13, fully covering the wire located in the middle. And because the fixed shaft 22 is hollow inside, part of the airflow flows downward along the mounting shaft 14 of the tubular structure and flows out from the air guide hole 141 corresponding to the internal area of ​​the fixed shaft 22 and enters the interior of the fixed shaft 22, so that the air in the internal area of ​​the fixed shaft 22 is... As the pressure increases and the temperature rises, the wire near the inner side is heated. At the same time, the protective atmosphere flows out from the through hole 221 on the side wall of the fixed shaft 22 and comes into contact with the inner part of the wire wound on the fixed shaft 22. The airflow of the protective atmosphere permeates and flows from the inside to the outside along the gap between the wires, transferring heat to the wires in contact. This causes the wire near the inner side to be heated and its temperature to be close to that of the wire on the outside. This further reduces the temperature difference between different parts of the wire, thereby improving the overall heat treatment quality of the wire and further reducing the problem of deformation and cracking of the wire due to uneven heating. Similarly, in the subsequent heat preservation stage, the protective atmosphere can be continuously released downwards, and the temperature of the heating element inside the air outlet chamber 121 can be gradually reduced. This allows the heat preservation atmosphere, which is in full contact with the wire, to pass through various parts of the wire while gradually cooling down, reducing the temperature difference between different parts of the wire and promoting the wire to achieve slow cooling while maintaining a uniform temperature distribution overall, thus ensuring the heat treatment quality of the wire. Furthermore, a limiting tube 24 is fixedly installed at the opening of the through hole 221. It can be a detachable connection achieved by a connector such as a fixing bolt. The limiting tube 24 extends laterally and passes through the gap between the wires wound on the outside of the fixed shaft 22. The side wall of the limiting tube 24 is evenly provided with dispersion holes 241. The limiting tube 24 communicates with the internal area of ​​the fixed shaft 22. The through holes 221 with the limiting tube 24 occupy only half of the number of through holes 221. In order to facilitate the even distribution of the limiting tube 24, the through holes 221 with the limiting tube 24 installed and the through holes 221 without the limiting tube 24 installed can be arranged to be staggered. Limiting tubes 24 are evenly arranged on the outer surface of the side wall of the fixed shaft 22. When winding the wire, the wire needs to be adjusted to bypass the limiting tubes 24. This increases the vertical gap between the wires, allowing the protective atmosphere flowing from the inside to the outside through the through holes 221 to penetrate through the gap, thus increasing the contact area between the wire and the protective atmosphere. Furthermore, since the limiting tubes 24 are connected to the corresponding through holes 221, some airflow flows into the limiting tubes 24 along the through holes 221 and then flows out through the evenly arranged dispersion holes 241 on the side wall of the limiting tubes 24. This allows the protective atmosphere to maintain the kinetic energy of the airflow through the flow channels inside the limiting tubes 24. As the airflow flows out through the dispersion holes 241, it can contact and impact the wire attached to the outer surface of the limiting tubes 24, penetrating deeper into the gap inside the wire and achieving efficient heat transfer and penetration, ensuring that the wire is heated evenly overall.

[0020] Example 2: Based on Embodiment 1, the middle part of the fixed disc 21 near the upper side of the annealing tray 2 is provided with an opening and communicates with the hollow part inside the fixed shaft 22, while the middle part of the fixed disc 21 near the lower side remains closed and slides in contact with the mounting shaft 14; and for the vertically stacked annealing trays 2, except for the uppermost annealing tray 2, a support plate is provided on the upper side of the fixed disc 21 at the top of the lower annealing tray 2 to lift the upper annealing tray 2, so that the joint part between the vertically stacked annealing trays 2 maintains a gap; An air guide ring 23 is provided on the outer surface of the fixed disc 21 near the upper side of the annealing tray 2. The outer edge of the air guide ring 23 extends horizontally and is close to the inner wall of the annealing chamber 13. A heat insulation ring is provided at the joint between the air guide ring 23 and the fixed disc 21. The heat insulation ring is made of high temperature resistant materials such as asbestos or stone to prevent heat from being transferred to the connected fixed disc 21 and to avoid the fixed disc 21 itself being too hot, which would cause the contact wire to be too hot and affect the heat treatment quality. Specific workflow: Based on the specific workflow in Example 1, during the release of the protective atmosphere, when the downward-flowing airflow comes into contact with the uppermost annealing tray 2, it is first intercepted by the outer air guide ring 23 of the upper fixed disc 21, which obstructs the vertical flow of the airflow and strengthens the horizontal flow. Then, it concentrates and flows into the hollow area inside the fixed shaft 22 from the middle opening of the upper fixed disc 21. Subsequently, because the lower fixed disc 21 remains closed, the airflow is intercepted and can only flow out horizontally from the through hole 221, horizontally washing the outer wound wire, achieving full contact and heat transfer, eliminating the contact dead angle of the protective atmosphere, and reducing the temperature difference of the wire in different parts. Then, the airflow continues to flow downward, passes through the gap raised by the support plate, and flows in from the top opening of the lower annealing tray 2, repeating the above process, so that the vertical and horizontal flow paths of the protective atmosphere are combined, achieving full contact with the wire and improving the utilization efficiency of the protective atmosphere.

[0021] Example 3: Based on Embodiment 2, the limiting tube 24 is a tapered tube, and the end of the limiting tube 24 near the fixed shaft 22 is the larger end. The outer surface of the limiting tube 24 is uniformly provided with annular protrusions 242, and the dispersion holes 241 are concentrated on the surface of the annular protrusions 242. Specific workflow: Based on the specific workflow in Example 2, the limiting tube 24 has a tapered tube structure. This increases the contact area between the tapered outer surface of the limiting tube 24 and the outer wound wire. Furthermore, the uniform annular protrusions 242 on the surface of the limiting tube 24 can be embedded into the wire during the winding process. This increases the relative friction between the limiting tube 24 and the wire, ensuring the wire remains stable during annealing heat treatment. On the other hand, the portion of the annular protrusions 242 embedded in the wire gap releases heated airflow through the dispersion holes 241 on the surface. The airflow is pressurized and its velocity increases in the inner tapered region, enhancing the impact of the outflowing airflow. This allows the airflow to further penetrate into the wire gap, heating the inner wire portion and promoting a uniform overall temperature distribution in the wire.

[0022] Example 4: Based on Embodiment 3, a layered rod 25 is provided between adjacent limiting tubes 24. The layered rod 25 is vertically arranged and evenly distributed along the horizontal direction. In order to facilitate disassembly, the limiting tube 24 can be composed of multiple segments, which are connected to each other by fixing bolts. The connection part can be near the location of the annular protrusion 242, which facilitates the winding and separation of the wire. Specific workflow: Based on the specific workflow in Example 3, the layering rod 25 and the limiting tube 24 are made detachable. Before the wire is wound, all the layering rods 25 are removed, and the wire is layered according to the winding thickness, which can be divided into three to five layers. When the layer thickness is reached during the wire winding process, the layering rod 25 closest to the fixed shaft 22 is installed. Then the wire passes around the layering rod 25 to form the second layer, and the already installed layering rod 25 can serve as a separator between the first and second layers. Then, when the second layer of wire reaches the predetermined thickness, the subsequent layering rods 25 are installed, and the above operation is repeated. This can ensure that more wire is wound on the annealing tray 2, while also ensuring that the horizontal gap of the wire is expanded by dividing the wound wire into several layers through the layering rods 25. Furthermore, the layered rod 25 is a tubular structure and its end communicates with the dispersion hole 241 on the side wall of the limiting tube 24. The outer surface of the layered rod 25 is uniformly provided with annular grooves 251, and the inner wall of the annular grooves 251 is uniformly provided with transmission holes 252, which communicate with the internal area of ​​the layered rod 25. As the protective atmosphere flows into the limiting tube 24, because the layering rod 25 is connected to the inside of the limiting tube 24, some of the protective atmosphere permeates into the hollow area inside the layering rod 25, and then flows out from the transmission hole 252 on the inner wall of the annular groove 251 provided on the side wall of the layering rod 25. Because the spacing between the openings of the annular groove 251 is smaller than the diameter of the wire, the wire is intercepted outside the annular groove 251. The setting of the annular groove 251 expands the gap between the wire and the layering rod 25. Thus, the airflow flowing out from the transmission hole 252 on the inner wall of the annular groove 251 first fills the annular groove 251 and then diffuses outward, making full contact with the wire coiled around the layering rod 25. This further eliminates the dead corners of the protective atmosphere coverage and promptly removes impurities such as oxide scale that may be generated on the surface of the wire during the heat treatment process. These impurities are separated from the wire under the flushing of the airflow and are recovered by the recovery chamber 131 with the downward flowing airflow, ensuring the processing quality of the wire.

[0023] Example 5: Based on Embodiment 4, the cross-section of the layered rod 25 located between the two limiting tubes 24 is elliptical, while the cross-section of the two ends of the layered rod 25 is circular and is embedded in the corresponding dispersion hole 241 on the limiting tube 24. The ends of the layered rod 25 and the dispersion hole 241 are rotatably connected. Furthermore, the dispersion hole 241 is a conical hole, and the extension line of the central axis of the dispersion hole 241 deviates from the center of the ellipse of the dispersion rod cross-section. Specific workflow: Based on the specific workflow in Example 4, as part of the protective atmosphere flows from the inside of the limiting tube 24 into the inside of the dispersing rod, and then flows out from the dispersing hole 241 on the side wall of the dispersing rod, the backflow of the airflow acts on the dispersing rod, causing the dispersing hole 241 to have a tendency to rotate. When the dispersing rod located in the gap between the wires rotates, because the cross-section is elliptical, it will squeeze the wires on both sides, making the gap between the wires corresponding to the dispersing rod larger. This makes it easier for the airflow from the dispersing hole 241 to flow out from the enlarged gap, expand the range of action, improve the heat transfer effect of the protective atmosphere, balance the temperature of different parts of the wire, and ensure the heat treatment quality of the wire.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A nickel-based alloy annealing apparatus, comprising an annealing furnace (1) and an annealing tray (2), characterized in that: The annealing furnace (1) includes a furnace shell (11), a furnace cover (12) is provided on the top of the furnace shell (11), and heating devices are uniformly arranged on the inner wall of the annealing chamber (13) inside the furnace shell (11). An atmosphere circulation unit is provided on the outside of the furnace shell (11), an exhaust chamber (121) is provided on the furnace cover (12), and a recovery chamber (131) is provided on the bottom inner wall of the annealing chamber (13). The exhaust chamber (121), the recovery chamber (131) and the circulating fan inside the atmosphere circulation unit are connected to realize the circulation of the protective atmosphere. The annealing tray (2) includes fixed discs (21) on the upper and lower sides and a fixed shaft (22) in the middle. The nickel-based alloy wire to be processed is fixedly wound on the outer surface of the fixed shaft (22). An installation shaft (14) is fixedly installed in the middle of the annealing chamber (13). The installation shaft (14) passes through the fixing hole (211) in the middle of the fixing disc (21) and limits and fixes the annealing material tray (2). The installation shaft (14) is a tubular structure, and the top of the installation shaft (14) is connected to the gas outlet chamber (121). The installation shaft (14) is evenly provided with gas guide holes (141) in the part inside the fixing shaft (22). The fixing disc (21) is evenly provided with flow guide holes (212). The side wall of the fixing shaft (22) is evenly provided with through holes (221). A limiting tube (24) is provided at the opening of the through hole (221). The limiting tube (24) extends laterally and passes through the gap between the wires wound on the outside of the fixed shaft (22). Dispersion holes (241) are evenly provided on the side wall of the limiting tube (24). The limiting tube (24) communicates with the internal area of ​​the fixed shaft (22).

2. The nickel-based alloy annealing apparatus according to claim 1, characterized in that: An opening is provided in the middle of the fixed disc (21) near the upper side of the annealing tray (2) and communicates with the hollow part inside the fixed shaft (22). The middle part of the fixed disc (21) near the lower side remains closed and slides in contact with the mounting shaft (14).

3. The nickel-based alloy annealing apparatus according to claim 2, characterized in that: An air guide ring (23) is provided on the outer surface of the fixed disc (21) near the upper side of the annealing tray (2). The outer edge of the air guide ring (23) extends horizontally and is close to the inner wall of the annealing chamber (13).

4. The nickel-based alloy annealing apparatus according to claim 1, characterized in that: The limiting tube (24) has a tapered tube structure, and the end of the limiting tube (24) near the fixed shaft (22) is the large end. The outer surface of the limiting tube (24) is uniformly provided with annular protrusions (242), and the dispersion holes (241) are concentrated on the surface of the annular protrusions (242).

5. The nickel-based alloy annealing apparatus according to claim 4, characterized in that: A layered rod (25) is provided between adjacent limiting tubes (24). The layered rod (25) is set vertically and arranged in a ring around the central axis of the fixed shaft (22).

6. The nickel-based alloy annealing apparatus according to claim 5, characterized in that: The layered rod (25) is a tubular structure and communicates with the interior of the limiting tube (24). The outer surface of the layered rod (25) is uniformly provided with annular grooves (251), and the inner wall of the annular grooves (251) is uniformly provided with transmission holes (252). The transmission holes (252) communicate with the interior area of ​​the layered rod (25).

7. The nickel-based alloy annealing apparatus according to claim 6, characterized in that: The layered rod (25) and the limiting tube (24) are rotatably connected, and the cross section of the layered rod (25) is elliptical.

Images