Continuous annealing process for nickel-based superalloy blocks

Abstract

The application provides a nickel-based high-temperature alloy block continuous annealing process and relates to the technical field of metal heat treatment, and comprises the following steps: S1, the to-be-annealed alloy block passing through a first preheating section is carried and conveyed by a conveying body, and the to-be-annealed alloy block is conveyed to an electromagnetic induction heating section along a heating conveying section to be heated; S2, after the alloy block is heated and kept for a predetermined time, the alloy block alternately enters two cooling conveying sections, the middle regions of the cooling conveying sections are parallel to the heating conveying section and close to each other, and after the heated alloy block exchanges heat with the to-be-annealed alloy block for a predetermined time in the middle regions of the cooling conveying sections, the heated alloy block is removed from the first preheating section. The process equipment is more compact, a special waste heat flue gas discharge pipeline is not needed for preheating, the annealing operation is simple, and the heat exchange and use efficiency are higher.

Description

Technical Field

[0001] This application relates to the field of metal heat treatment, and in particular to a continuous annealing process for nickel-based superalloy blocks. Background Technology

[0002] To eliminate the internal stress of the nickel-based superalloy block, meet the requirements of subsequent processing, and improve the quality of the finished product, the nickel-based superalloy block needs to be annealed.

[0003] Electromagnetic induction heating can rapidly heat nickel-based superalloy blocks. Combined with a conveyor chain, it enables efficient and continuous heating of the nickel-based superalloy blocks, which is more efficient and effective compared to traditional centralized heating annealing in a furnace. Traditional chain annealing structures are single-direction annealing structures, and the length of the production line varies greatly in order to meet the requirements of annealing preheating, heat preservation, and slow cooling. At the same time, in order to avoid the nickel-based superalloy from heating rapidly, it is preheated. Due to the limitations of the traditional unidirectional conveyor structure, the annealing preheating process often uses resistance wire preheating, heating exhaust gas preheating, or a combination of both. The heat dissipated by the nickel-based superalloy block during the cooling stage is difficult to utilize efficiently for the preheated nickel-based superalloy block, resulting in energy waste. In addition, heating exhaust gas preheating requires the design of a dedicated waste heat flue gas pipeline, which increases the sealing requirements and operational difficulty of the annealing process. Summary of the Invention

[0004] In view of the above problems, embodiments of this application are proposed to provide a continuous annealing process for nickel-based superalloy blocks.

[0005] To address the aforementioned issues, this invention provides a continuous annealing process for nickel-based superalloy blocks. This process features a more compact equipment structure, eliminates the need for dedicated waste heat flue gas emission pipes for preheating, simplifies the annealing operation, and offers higher heat exchange and utilization efficiency.

[0006] To solve the above problems, the technical solution adopted by the present invention is as follows: A continuous annealing process for nickel-based superalloy blocks uses a continuous annealing equipment for nickel-based superalloy blocks. The equipment includes a first preheating section, a second preheating section, and an electromagnetic induction heating section arranged sequentially. The second preheating section contains a conveying device for transferring the alloy blocks. This conveying device includes a heating conveying section in the middle and cooling conveying sections on either side of the heating conveying section. The conveying device contains multiple conveying bodies for carrying the alloy blocks. The process includes the following steps: S1, the conveying bodies carry and transport the alloy blocks to be annealed through the first preheating section, transporting them along the heating conveying section to the electromagnetic induction heating section for heating; S2, after the heated alloy blocks are held at a predetermined temperature, they alternately enter the two cooling conveying sections. The middle area of ​​the cooling conveying sections is parallel to and close to the heating conveying sections. After the heated alloy blocks exchange heat with the alloy blocks to be annealed in the middle area of ​​the cooling conveying sections for a predetermined time, they are removed from the first preheating section.

[0007] Preferably, intermediate transfer devices are provided on both sides of the heating conveying section. After electromagnetic induction heating, the conveying body and the heated alloy block alternately enter the two cooling conveying sections through the intermediate transfer devices.

[0008] Preferably, the intermediate transfer device includes two layers of spaced limiting discs, forming an intermediate transfer area between the two limiting discs, and also includes a control shaft fixedly connected to the limiting discs. After the conveying body enters the intermediate transfer area, the control shaft drives the limiting discs and the conveying body to deflect at a predetermined angle relative to the corresponding cooling conveying section.

[0009] Preferably, the conveying body includes a movable base and a support rod located above the movable base. The support rod is rotatably connected to the movable base. The support rod in the heating conveying section is periodically controlled to reciprocate at a predetermined angle, thereby controlling the different surfaces of the alloy block to be annealed to periodically exchange heat with the heated alloy block to achieve uniform heat exchange.

[0010] Preferably, the side wall of the support rod is provided with a limiting structure, and the surface of the limiting plate located above has a strip-shaped opening that runs vertically through the top and bottom. The inner diameter of the strip-shaped opening is larger than the outer diameter of the support rod. When the conveying body moves to the intermediate transfer area, the limiting structure is located above the strip-shaped opening.

[0011] Preferably, a deflection mechanism is provided above the heating conveying section to control the reciprocating deflection of the bearing rod within the heating conveying section by a predetermined angle.

[0012] Preferably, the deflection mechanism includes a first deflection strip plate and a second deflection strip plate, the surfaces of the first deflection strip plate, the second deflection strip plate and the bearing rod abut against each other, and further includes a linear motion driver for controlling the relative linear movement of the first deflection strip plate and the second deflection strip plate.

[0013] Preferably, the linear motion actuator includes a pneumatic telescopic rod located at the bottom of the heating conveying section away from the alloy block. The telescopic end of the pneumatic telescopic rod is fixedly connected to one of the deflecting strip plates via an intermediate rod, and the other deflecting strip plate is fixed relative to it along the conveying direction of the alloy block to be annealed.

[0014] Preferably, a tensioning telescopic rod is also provided between the two deflecting strips. The tensioning telescopic rod is linked and controlled with a pneumatic telescopic rod, and the two deflecting strips are controlled to move along the direction perpendicular to the conveying direction of the alloy block to be annealed through the tensioning telescopic rod.

[0015] Preferably, the first preheating section and the second preheating section are perpendicular to each other. The first preheating section is provided with a vertical conveying component for gripping and placing. The vertical movement path of the vertical conveying component overlaps with the horizontal movement path of the conveying body. The alloy block is moved out or placed after staying in the first preheating section for a predetermined time by the vertical conveying component.

[0016] The beneficial effects of this invention are as follows: Compared with existing technologies, the above process can achieve primary and secondary preheating of the alloy block to be annealed, realizing a step-by-step, gentle preheating and avoiding excessively rapid heating of the alloy block during subsequent electromagnetic heating, which could lead to cracking. Compared with traditional unidirectional conveying structures, the parallel and close-proximity heating and cooling conveying sections allow the alloy block to be annealed and the heated alloy block undergoing return cooling to come into close contact, achieving efficient heat exchange. This satisfies the preheating requirements of the alloy block to be annealed while achieving efficient utilization of heat and reducing energy loss. The equipment structure used in this process is more compact, eliminating the need for a dedicated waste heat flue gas exhaust pipe for preheating, simplifying the annealing operation, and increasing efficiency. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a process flow diagram of the present invention.

[0018] Figure 2 This is a three-dimensional structural diagram of the continuous annealing equipment for high-temperature alloy blocks according to the present invention.

[0019] Figure 3 For the present invention Figure 2 A top-view structural diagram.

[0020] Figure 4 This is a schematic diagram of the internal structure of the high-temperature alloy block continuous annealing equipment of the present invention.

[0021] Figure 5 For the present invention Figure 4 A schematic diagram of the AA-direction cross-section structure.

[0022] Figure 6 For the present invention Figure 4 A side view structural diagram.

[0023] Figure 7 This is a three-dimensional structural diagram of the intermediate transfer device and the main conveying body of the present invention.

[0024] Figure 8 This is a schematic diagram of the insertion end structure of the present invention.

[0025] In the diagram: 100, alloy block; 101, alloy block to be annealed; 102, alloy block after heating; 200, first preheating section; 300, second preheating section; 310, second preheating chamber; 400, vertical conveying assembly; 410, electric fork plate; 420, insertion end; 421, vertical positioning rod; 422, horizontal positioning rod; 500, conveying device; 510, heating conveying section; 520, cooling conveying section; 530 531. Intermediate transfer device; 532. Limiting plate; 533. Strip opening; 540. Control shaft; 541. Conveying body; 542. Moving base; 543. Bearing rod; 600. Deflection mechanism; 610. First deflection strip plate; 620. Second deflection strip plate; 700. Linear motion driver; 710. Pneumatic telescopic rod; 720. Intermediate rod; 800. Reciprocating deflection driver; 900. Electromagnetic induction heating section. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] This process is suitable for the continuous annealing of nickel-based superalloy blocks. Its core objective is to refine the alloy grains and eliminate processing stress through segmented preheating, electromagnetic induction heating, and heat exchange cooling. Simultaneously, it utilizes heat exchange to recover heat and reduce energy consumption. Nickel-based superalloy blocks are commonly used in high-temperature components such as aero-engines and gas turbines. Annealing treatment improves their toughness and corrosion resistance, ensuring performance in subsequent processing and use.

[0028] See attached document Figure 1 -Appendix Figure 8The continuous annealing process for nickel-based superalloy blocks uses a continuous annealing equipment for nickel-based superalloy blocks. The continuous annealing equipment for nickel-based superalloy blocks includes a first preheating section 200, a second preheating section 300, and an electromagnetic induction heating section 900 arranged sequentially. The alloy block 100 passes through the first preheating section 200, the second preheating section 300, and the electromagnetic induction heating section 900 in sequence to gradually increase its temperature to meet the annealing heating requirements of the nickel-based superalloy.

[0029] Inside the second preheating section 300, there is a conveying device 500 for transferring the alloy block 100. The conveying device 500 includes a heating conveying section 510 located in the middle and cooling conveying sections 520 located on both sides of the heating conveying section 510. Inside the conveying device 500, there are multiple conveying bodies 540 for carrying the alloy block 100. The conveying body 540 is selected as an automatic force-moving trolley, which can carry the alloy block 100 and move linearly along the predetermined conveying section to realize the preheating, induction heating and heat preservation cooling stages in sequence.

[0030] The heating conveying section 510 and cooling conveying section 520 mentioned above are both semi-enclosed track structures. The upper end of the track is provided with an opening that allows the supporting structure to pass through. The track is made of heat-insulating material, which can separate the conveying body 540 inside the track and the alloy block 100 outside the track by a greater distance, so as to reduce the impact of the high temperature of the alloy block 102 after heating on the related structures of the conveying body 540. A heat conduction structure can also be provided inside the track to further isolate and conduct high-temperature heat.

[0031] The process of this invention specifically includes the following steps: Step 1: Control the alloy block 101 to be annealed to move directionally along the first preheating section 200, and perform a preheating in the first preheating section 200 to gradually heat the low temperature alloy block 101 to the first temperature range.

[0032] Step 2: The alloy block 101 to be annealed is carried and transported through the first preheating section 200 by the conveying body 540. During this process, the alloy block 101 to be annealed can be preheated again in the second preheating chamber 310 of the second preheating section 300, which can gradually heat the alloy block 101 to be annealed in the first temperature range to a higher second temperature range. Then, the alloy block 101 to be annealed is transported to the electromagnetic induction heating section 900 for heating along the heating conveying section 510. At this time, the nickel-based high-temperature alloy block is heated to the temperature required for annealing by the electromagnetic induction heating section 900. The temperature required for annealing needs to be comprehensively determined according to the material properties and processing requirements of the nickel-based high-temperature alloy block. The above content is known to those skilled in the art in the prior art and does not involve technical improvement, so it will not be elaborated on here.

[0033] Step 3: After the heated alloy block 102 has been kept at a predetermined temperature for a predetermined time, it alternately enters two cooling conveying sections 520. The middle area of ​​the cooling conveying section 520 is parallel to and close to the heating conveying section 510. After the heated alloy block 102 exchanges heat with the alloy block 101 to be annealed in the middle area of ​​the cooling conveying section 520 for a predetermined time, it is removed from the first preheating section 200.

[0034] During the above process, the heated alloy block 102 still has a high temperature after heat preservation. After heat preservation, it needs to be gradually cooled down. By conveying the heated alloy block 102 to the middle area of ​​the cooling conveying section 520 and facing the alloy block 101 to be annealed, the alloy block 101 to be annealed and the heated alloy block 102 are in close proximity and radiative heat exchange is carried out to achieve efficient heat transfer. At this time, the alloy block 101 to be annealed has been preheated in the first preheating section 200, which can avoid the large temperature difference between the alloy block 101 to be annealed and the heated alloy block 102, which would cause the alloy block 101 to heat up rapidly or the heated alloy block 102 to cool down rapidly. This can achieve relatively gentle heating and cooling, which meets the processing requirements of nickel-based high-temperature alloy annealing.

[0035] The first preheating section 200 is a combination of hot air preheating and relatively low-temperature radiation preheating, with a preheating temperature of 400-600℃ and a preheating time of 30-60 minutes. This controls the alloy block to gradually and uniformly increase its temperature, avoiding thermal stress cracking caused by direct high-temperature heating. The second preheating section 300 is a relatively high-temperature radiation heat exchange preheating zone. It utilizes the residual heat from the alloy block 102 heated in the cooling conveying section 520 to further preheat the alloy block 101 to be annealed, raising the preheating temperature to 600-900℃ and increasing the residual heat utilization rate by more than 30%. The electromagnetic induction heating section 900 uses a medium-frequency electromagnetic induction heater with a frequency of 1-10kHz, which can quickly heat the alloy block to the annealing temperature, and the heating is uniform with minimal heat-affected zone.

[0036] The conveying device 500 is a separated track conveying structure, suitable for continuous operation of electromagnetic induction heating; two cooling conveying sections 520 are symmetrically arranged on both sides of the heating conveying section 510, with the same length as the heating conveying section 510, to ensure the heat exchange efficiency between the heated alloy block 102 and the alloy block 101 to be annealed. During the heat preservation period in step three, inert gas protection is used to prevent oxidation of the alloy block; during the heat exchange process, the temperature of the alloy block 101 to be annealed gradually rises, while the temperature of the heated alloy block 102 gradually decreases. Subsequently, the heated alloy block 102 continues to cool down to below 300°C and is then removed from the first preheating section 200.

[0037] In summary, the above process enables the sequential preheating of the alloy block 101 to be annealed, achieving a gradual and gentle preheating process that avoids excessively rapid heating during subsequent electromagnetic heating, which could lead to cracking of the alloy block. Compared to traditional unidirectional conveying structures, the parallel and close-proximity heating conveying section 510 and cooling conveying section 520 design allows the alloy block 101 to be annealed and the heated alloy block 102 undergoing return cooling to come into close contact, achieving efficient heat exchange. This satisfies the preheating requirements of the alloy block 101 while simultaneously enabling efficient utilization of heat and reducing energy loss. The equipment used in this process has a more compact structure, eliminating the need for a dedicated waste heat flue gas exhaust pipe for preheating, simplifying the annealing operation, and increasing efficiency.

[0038] Intermediate transfer devices 530 are provided on both sides of the heating conveying section 510. The intermediate transfer devices 530 are automatically driven and controlled by the reciprocating deflection driver 800 at the bottom. After electromagnetic induction heating, the conveying body 540 and the heated alloy block 102 alternately enter the two cooling conveying sections 520 through the intermediate transfer devices 530. The number of conveying bodies 540 in the cooling conveying sections 520 is equal to the number of conveying bodies 540 in the heating conveying section 510. The intermediate transfer devices 530 can alternately control the directional and orderly movement of the conveying bodies 540 to meet the need for continuous transfer and conveying of the alloy block 101 to be annealed and the heated alloy block 102.

[0039] The intermediate transfer device 530 is a rotary transfer mechanism located on one side of the outlet of the electromagnetic induction heating section 900. It is linked and controlled with the conveying device 500 to realize the alternating distribution of the heated alloy block 102 between the two cooling conveying sections 520, avoid overload of a single cooling conveying section, ensure that the number of heated alloy blocks 102 on both sides of the alloy block 101 to be annealed is equal, ensure that both sides of the alloy block 101 to be annealed can achieve efficient preheating, and ensure continuous annealing operation.

[0040] Specifically, the intermediate transfer device 530 includes two-layer spaced limiting disks 531, forming an intermediate transfer area between the two limiting disks 531. The intermediate transfer area can carry and accommodate the conveying body 540. It also includes a control shaft 533 fixedly connected to the limiting disks 531. After the conveying body 540 enters the intermediate transfer area, the control shaft 533 drives the limiting disks 531 and the conveying body 540 to deflect at a predetermined angle and face the corresponding cooling conveying section 520. After the connection with the cooling conveying section 520 is stable, the conveying body 540 can be conveyed into the cooling conveying section 520 under the drive of automatic force or external power structure and continue to move in a directional manner, so as to realize the directional and stable conveying of the heated alloy block 102.

[0041] Located in the attached Figure 5The intermediate transfer device 530 on the right side transports the main conveyor 540 and the heated alloy block 102, located in the attached... Figure 5 The intermediate transfer device 530 on the left transports the unloaded conveying body 540 to the starting position of the heating conveying section 510 to realize the conveying cycle, in preparation for the subsequent carrying and conveying of the alloy block 101 to be annealed.

[0042] The limiting plate 531 is a circular steel plate with heat resistance. The double-layer spacing is adapted to the height of the conveying body 540. The resulting intermediate transfer area can limit the upper and lower movement of the conveying body 540 to prevent it from falling off during transfer. Temporary telescopic clamping structures can also be set inside the limiting plate 531 on the left and right sides to clamp and limit the conveying body 540, ensuring the stability of the conveying body 540 during rotational conveying.

[0043] The control shaft 533 is driven by a servo motor, which can drive the limit plate 531 and the conveying body 540 to deflect smoothly and accurately. The predetermined deflection angle is determined according to the position of the opening between the heating conveying section 510 and the cooling conveying section 520, so that the conveying body 540 deflects from the conveying direction along the middle heating conveying section 510 to the same direction as the cooling conveying section 520.

[0044] Furthermore, the conveying body 540 includes a movable base 541 and a support rod 542 located above the movable base 541. The support rod 542 is rotatably connected to the movable base 541. The support rod 542 in the heating conveying section 510 is periodically controlled to reciprocate and deflect at a predetermined angle, thereby controlling the different surfaces of the alloy block 101 to be annealed to periodically exchange heat with the heated alloy block 102.

[0045] The movable base 541 is made of high-temperature resistant alloy and has rollers at the bottom. It works with the guide rail of the conveying device 500 to ensure smooth movement. The support rod 542 is a cylindrical structure used to support the nickel-based high-temperature alloy block. The support rod 542 and the movable base 541 are rotatably connected by bearings to facilitate deflection. The reciprocating deflection angle is ±30°. By deflecting, the different surfaces of the alloy block 101 to be annealed are alternately facing the alloy block 102 after heating, avoiding uneven temperature caused by continuous heat exchange on a single surface.

[0046] It should be noted that the reciprocating deflection mentioned above is not a continuous rotation. It is determined based on the temperature of the cooling stage of the nickel-based superalloy. The higher the initial cooling temperature of the nickel-based superalloy, the higher the frequency of reciprocating deflection.

[0047] A limiting structure is provided on the side wall of the bearing rod 542. The upper limiting plate 531 has a vertically penetrating slot 532 on its surface. The inner diameter of the slot 532 is larger than the outer diameter of the bearing rod 542. When the conveying body 540 moves into the intermediate transfer area, the limiting structure is located above the slot 532. Through the above structural design, the alloy block 100 can be further separated from the conveying body 540, reducing the impact of the high temperature of the alloy block 100 on the related structures of the conveying body 540.

[0048] Taking the annular alloy block 100 as an example, the aforementioned limiting structure can be a bearing plate with a size larger than the central hole. For other shapes of nickel-based superalloys, a high-temperature resistant pallet with a protective structure around it can be selected to achieve effective bearing and conveying of nickel-based superalloys of different shapes.

[0049] The limiting structure is an annular protrusion fixed to the side wall of the support rod 542, used to restrict the vertical displacement of the conveying body 540 within the intermediate transfer area, ensuring stability during transfer. The length of the slot 532 is 40-60mm, and its width is 5-8mm larger than the outer diameter of the support rod 542. This ensures that the support rod 542 can pass through smoothly, and also provides lateral limiting for the support rod 542 through the side wall of the slot 532 during transfer, preventing swaying during deflection. After the conveying body 540 enters the intermediate transfer area, the limiting structure is located above the slot 532 of the upper limiting plate 531, restricting the upward movement of the conveying body 540. Together with the lower limiting plate 531, it achieves vertical limiting of the conveying body 540.

[0050] Furthermore, a deflection mechanism 600 is installed above the heating conveying section 510 to control the reciprocating deflection of the bearing rod 542 within the heating conveying section 510 by a predetermined angle. The deflection mechanism 600 is a mechanical linkage structure, installed on the frame above the intermediate heating conveying section 510, and linked to the movement rhythm of the conveying body 540. When the conveying body 540 moves to the heat exchange area of ​​the intermediate heating conveying section 510, the deflection mechanism 600 is activated, controlling the reciprocating deflection of the bearing rod 542. The function of the deflection mechanism 600 is to achieve uniform heat exchange of the alloy block 101 to be annealed, avoiding excessively high or low local temperatures. The deflection angle of the deflection mechanism 600 can be flexibly adjusted through an adjustable structure to adapt to nickel-based high-temperature alloy blocks of different sizes and shapes.

[0051] Specifically, the deflection mechanism 600 includes a first deflection strip plate 610 and a second deflection strip plate 620. The surfaces of the first deflection strip plate 610, the second deflection strip plate 620 and the bearing rod 542 abut against each other. It also includes a linear motion driver 700 that controls the relative linear movement of the first deflection strip plate 610 and the second deflection strip plate 620. After the first deflection strip plate 610 and the second deflection strip plate 620 are pressed together, the linear motion driver 700 controls the relative linear movement of the two strip plates, which drives the bearing rod 542 to reciprocate under the action of friction, thereby achieving efficient drive control.

[0052] The first deflecting strip 610 and the second deflecting strip 620 are long strip steel plates with wear-resistant surfaces. They are arranged parallel to each other above the intermediate heating and conveying section 510, and can abut against the side wall of the bearing rod 542. The relative linear movement of the two deflecting strips can drive the bearing rod 542 to deflect back and forth: when the first deflecting strip 610 moves forward and the second deflecting strip 620 moves backward or remains relatively stationary, the bearing rod 542 deflects to one side; conversely, it deflects to the other side. The contact points between the deflecting strips and the bearing rod 542 have friction protrusions that can fit snugly against the surface of the bearing rod 542, preventing slippage during deflection and ensuring accurate deflection angle.

[0053] It should be noted that the outer diameters of the multiple support rods 542 should be relative to each other to ensure that the two strip plates can clamp and drive the multiple support rods 542 synchronously.

[0054] Specifically, the linear motion actuator 700 includes a pneumatic telescopic rod 710, which is located at the bottom of the heated conveying section 510 on the side away from the alloy block 100. The telescopic end of the pneumatic telescopic rod 710 is fixedly connected to one of the deflecting strip plates via an intermediate rod 720. The other deflecting strip plate is relatively fixed along the conveying direction of the alloy block 101 to be annealed. Through the above structural design, the influence of the high temperature above the conveying device 500 on the control of the linear motion actuator 700 below can be reduced, thereby improving the control accuracy and control life of the related structures of the linear motion actuator 700.

[0055] For example, the first deflecting strip 610 is fixed to the intermediate rod 720, and the second deflecting strip 620 is relatively fixed along the conveying direction of the alloy block 101 to be annealed (the second deflecting strip 620 can slide along a direction perpendicular to the conveying direction of the alloy block 101 to be annealed). When the pneumatic telescopic rod 710 extends, it pushes the first deflecting strip 610 forward, causing the bearing rod 542 to rotate in the first direction; when the pneumatic telescopic rod 710 retracts, the first deflecting strip 610 returns to its original position, and the bearing rod 542 rotates in the second direction, realizing reciprocating motion. The linear motion driver 700 is connected to the PLC control system and automatically controls the extension and retraction of the pneumatic telescopic rod 710 according to a preset cycle to realize the periodic deflection of the bearing rod 542.

[0056] A tensioning telescopic rod is also provided between the two deflecting strips. The tensioning telescopic rod is linked to the pneumatic telescopic rod 710. The tensioning telescopic rod controls the two deflecting strips to move along the conveying direction perpendicular to the alloy block 101 to be annealed. Through the above structural design, the clamping and loosening of the two deflecting strips and the intermediate support rod 542 can be realized. During the directional movement of the conveying body 540, the two deflecting strips are controlled to move away from each other to avoid contact with the support rod 542 and the formation of frictional obstacles. After the conveying body 540 is paused for a certain period of preheating, the two deflecting strips are controlled to move closer to each other and clamp with the support rod 542 to ensure sufficient friction to drive the support rod 542 to drive the alloy block 101 to be annealed to rotate.

[0057] Furthermore, the setting of the tensioning telescopic rod enables the deflection mechanism 600 to adapt to bearing rods 542 of different diameters, improving the versatility of the equipment and meeting the adaptive deflection control for alloy blocks 101 to be annealed of different weights. The arrangement of the tensioning telescopic rod can be similar to that of the pneumatic telescopic rod 710, located at the bottom of the conveying device 500 to achieve stable and efficient drive control. The tensioning telescopic rod is selected as a double-headed telescopic rod, and the telescopic ends of the double-headed telescopic rod are respectively connected to the corresponding deflection strip plates, ensuring that the deflection strip plates can move closer or further apart during the forward and backward movement, avoiding interference.

[0058] Furthermore, the first preheating section 200 and the second preheating section 300 are perpendicular to each other. The first preheating section 200 is equipped with a vertical conveying component 400 for gripping and placing. The vertical movement path of the vertical conveying component 400 overlaps with the horizontal movement path of the conveying body 540. The alloy block 100 is controlled by the vertical conveying component 400 to stay in the first preheating section 200 for a predetermined time before being moved out or placed. The predetermined time of stay allows for subsequent cooling in the first preheating section 200. Protective gas is continuously pumped into the first preheating section 200 and the second preheating section 300 to maintain a slightly positive pressure state. The alloy block 100 located in the first preheating section 200 can be in an inert gas protective environment to avoid oxidation.

[0059] The vertical conveying assembly 400 can be an automatically controlled electric fork plate 410, which can move cyclically along a ring track laid on the inner wall of the first preheating section 200 to realize the insertion, placement, or lifting of the alloy block 100.

[0060] The vertical conveying assembly 400 can also be a lifting structure located on the outer side above the first preheating section 200. The bottom of the lifting structure is fixed with an insertion end 420. The insertion end 420 includes a vertical positioning rod 421 and multiple horizontal positioning rods 422 on the side wall of the vertical positioning rod 421. Two insertion ends 420 are symmetrically arranged according to the width of the alloy block 100, which can ensure that the bearing rod 542 passes through normally while capturing and bearing the alloy block 100. In this process, the lifting amplitude of the lifting structure can be precisely controlled according to the thickness of the alloy block 100 and the height of the bearing rod 542.

[0061] The first preheating section 200 is a vertically arranged cylindrical or rectangular chamber, and the second preheating section 300 is a horizontally arranged rectangular channel. The two are vertically connected to form an L-shaped layout, which is compact, reasonable, and saves floor space.

[0062] This article uses nickel-based superalloys as an example to illustrate this process. Obviously, those skilled in the art, upon understanding the core concept of this invention, can use the technical solution of this application to anneal other superalloys, and the above solution is naturally within the protection scope of the technical solution of this application.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A continuous annealing process for nickel-based superalloy blocks, using a continuous annealing equipment for nickel-based superalloy blocks, characterized in that... The continuous annealing equipment for nickel-based high-temperature alloy blocks includes a first preheating section (200), a second preheating section (300), and an electromagnetic induction heating section (900). The second preheating section (300) is equipped with a conveying device (500). The conveying device (500) includes a heating conveying section (510) located in the middle and cooling conveying sections (520) located on both sides of the heating conveying section (510). The conveying device (500) is equipped with multiple conveying bodies (540) for carrying alloy blocks (100). Includes the following steps: S1. The alloy block (101) to be annealed is carried and transported through the first preheating section (200) by the conveying body (540), and the alloy block (101) to be annealed is transported to the electromagnetic induction heating section (900) for heating along the heating conveying section (510); S2. After the alloy block (102) to be heated is kept at a predetermined temperature for a predetermined time, it alternately enters two cooling conveying sections (520). The middle area of ​​the cooling conveying section (520) is parallel to and close to the heating conveying section (510). After the heated alloy block (102) exchanges heat with the alloy block (101) to be annealed in the middle area of ​​the cooling conveying section (520) for a predetermined time, it is removed from the first preheating section (200).

2. The continuous annealing process for nickel-based superalloy blocks according to claim 1, characterized in that, Both sides of the heating conveying section (510) are provided with intermediate transfer devices (530). After electromagnetic induction heating, the conveying body (540) and the heated alloy block (102) alternately enter the two cooling conveying sections (520) through the intermediate transfer device (530).

3. The continuous annealing process for nickel-based superalloy blocks according to claim 2, characterized in that, The intermediate transfer device (530) includes a double-layered spaced limiting plate (531), with an intermediate transfer area formed between the two limiting plates (531). It also includes a control shaft (533) fixedly connected to the limiting plate (531). After the conveying body (540) enters the intermediate transfer area, the control shaft (533) drives the limiting plate (531) and the conveying body (540) to deflect at a predetermined angle relative to the corresponding cooling conveying section (520).

4. The continuous annealing process for nickel-based superalloy blocks according to claim 3, characterized in that, The conveying body (540) includes a movable base (541) and a support rod (542) located above the movable base (541). The support rod (542) is rotatably connected to the movable base (541), and the support rod (542) in the heating conveying section (510) is periodically controlled to reciprocate and deflect by a predetermined angle.

5. The continuous annealing process for nickel-based superalloy blocks according to claim 4, characterized in that, The side wall of the bearing rod (542) is provided with a limiting structure. The surface of the limiting plate (531) located above has a strip-shaped opening (532) that runs vertically through the top and bottom. The inner diameter of the strip-shaped opening (532) is larger than the outer diameter of the bearing rod (542). When the conveying body (540) moves to the intermediate transfer area, the limiting structure is located above the strip-shaped opening (532).

6. The continuous annealing process for nickel-based superalloy blocks according to claim 4, characterized in that, A deflection mechanism (600) is provided above the heating conveying section (510) to control the reciprocating deflection of the bearing rod (542) in the heating conveying section (510) by a predetermined angle.

7. The continuous annealing process for nickel-based superalloy blocks according to claim 6, characterized in that, The deflection mechanism (600) includes a first deflection bar (610) and a second deflection bar (620), the surfaces of the first deflection bar (610), the second deflection bar (620) and the support rod (542) abutting each other, and also includes a linear motion driver (700) for controlling the relative linear movement of the first deflection bar (610) and the second deflection bar (620).

8. The continuous annealing process for nickel-based superalloy blocks according to claim 7, characterized in that, The linear motion drive (700) includes a pneumatic telescopic rod (710), which is located at the bottom of the heating conveying section (510) away from the alloy block (100). The telescopic end of the pneumatic telescopic rod (710) is fixedly connected to one of the deflection strips via an intermediate rod (720), and the other deflection strip is fixed relative to the conveying direction of the alloy block (101) to be annealed.

9. The continuous annealing process for nickel-based superalloy blocks according to claim 8, characterized in that, A tensioning telescopic rod is also provided between the two deflection strips. The tensioning telescopic rod is linked to the pneumatic telescopic rod (710) for control. The tensioning telescopic rod controls the two deflection strips to move along the conveying direction perpendicular to the alloy block (101) to be annealed.

10. The continuous annealing process for nickel-based superalloy blocks according to any one of claims 1-9, characterized in that, The first preheating section (200) and the second preheating section (300) are perpendicular to each other. The first preheating section (200) is provided with a vertical conveying component (400) for gripping and placing. The vertical movement path of the vertical conveying component (400) overlaps with the horizontal movement path of the conveying body (540). The alloy block (100) is controlled by the vertical conveying component (400) to move out or be placed after staying in the first preheating section (200) for a predetermined time.

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