Manufacturing process of a nickel-based alloy valve body die forging and its heat treatment equipment

Abstract

This invention discloses a manufacturing process and heat treatment equipment for nickel-based alloy valve body forgings, specifically relating to the field of nickel-based alloy heat treatment technology. The heat treatment equipment includes a treatment tank with supporting feet installed at the bottom. An air inlet pipe is installed on the outside of the treatment tank, and a switch valve is fixedly installed on the air inlet pipe. A reciprocating screw drives an extension block, carrying a sliding block, to move into a cold chamber inside the treatment tank. The refrigeration unit in the cold chamber cools the nickel-based alloy valve body forging. Then, the sliding block and sliding rod are used to send the nickel-based alloy valve body forging back to the hot chamber for reheating. This design avoids the cumbersome process of disassembling the storage frame during loading and unloading, and also avoids the rapid temperature loss in the furnace during disassembly, which would waste resources due to subsequent secondary heating.

Description

Technical Field

[0001] This invention relates to the field of nickel-based alloy heat treatment technology, and more specifically, to a manufacturing process and heat treatment equipment for nickel-based alloy valve body forgings. Background Technology

[0002] Nickel-based alloy valve body forgings are widely used in high-end equipment fields such as petrochemicals, aerospace, and power energy due to their excellent high temperature resistance, corrosion resistance, and high strength. The quality of their forming and heat treatment directly determines the performance and service life of the valve body.

[0003] When processing nickel-based alloy valve bodies with large wall thickness and complex structures, such as GH4169 (Inconel 718) nickel-based alloy valve bodies, as well as precipitation-hardening nickel-based high-temperature alloy valve bodies of the same system, such as GH4145 (Inconel X-750) and GH4725 (Inconel 725), direct water quenching after heat treatment solution treatment can easily generate huge thermal stress, leading to valve body cracking. Therefore, it is necessary to first air-cool slowly to release some stress, and then return to the furnace for aging to ensure safety. Existing heat treatment equipment requires manual or mechanical removal of the valve body after heating, air cooling, and then placing it back into the furnace. Since the workpiece is placed in a storage frame, the storage frame needs to be fixed in the furnace. The process of removing and placing the workpiece requires disassembling the storage frame, which is cumbersome. At the same time, the temperature inside the furnace drops rapidly during disassembly, and subsequent reheating wastes resources. Summary of the Invention

[0004] This invention provides a manufacturing process and heat treatment equipment for nickel-based alloy valve body forgings, solving the technical problems in related technologies where valve bodies are removed manually or mechanically after heating, cooled by air, and then placed back into the furnace. Since the workpiece is placed in a storage frame, the storage frame needs to be fixed in the furnace. The process of removing and placing the workpiece requires disassembling the storage frame, which is cumbersome. At the same time, the temperature inside the furnace drops rapidly during disassembly, and subsequent reheating wastes resources.

[0005] This invention provides a heat treatment device for nickel-based alloy valve body forgings, including a treatment tank with supporting feet installed at the bottom and an air inlet pipe installed on the outside of the tank. A switch valve is fixedly installed on the air inlet pipe. A storage unit for supporting the nickel-based alloy valve body forging is movably arranged inside the treatment tank. The treatment tank also includes a sliding unit, a switch unit, and a cooling unit. The sliding unit is used to drive the storage unit to move laterally, the switch unit is used to isolate and seal the interior of the treatment tank, and the cooling unit is used to cool the valve body forging inside the treatment tank.

[0006] The sliding unit includes multiple fixed blocks, which are equidistantly and evenly fixed to the inner wall of the processing tank. Each fixed block is fixedly connected to a fixed frame, and two sliding rods are fixedly connected to the fixed frame. The two sliding rods are symmetrically arranged on both sides of the fixed frame, and a sliding block is slidably connected to each sliding rod. The sliding block is connected to the placement unit and is used to drive the placement unit to slide along the sliding rod.

[0007] In a preferred embodiment, the sliding unit further includes a reciprocating screw, which is rotatably disposed inside the processing barrel. An extension block is fixedly connected to the sliding block, and the extension block is rotatably connected to the reciprocating screw. A driven wheel is fixedly connected to one end of the reciprocating screw.

[0008] In a preferred embodiment, a mounting block is fixedly connected to the sliding block, and two mounting blocks are provided, with the two sets of mounting blocks symmetrically arranged on the sliding block. A mounting column is fixedly connected to the mounting block, and a fixing plate is rotatably connected to the mounting column.

[0009] In a preferred embodiment, the switch assembly includes two switch plates, which are symmetrically slidably disposed within the processing tank. Two support blocks are fixedly connected to the switch plates, and the two support blocks are symmetrically arranged on the switch plates. A support column is fixedly connected to each support block, and the support column passes through the processing tank. A spring is sleeved on the support column, and both ends of the spring are fixedly connected to the support column and the processing tank, respectively.

[0010] In a preferred embodiment, the switch assembly further includes two mounting blocks, which are symmetrically fixed to the outer wall of the processing tank. A drive rod is rotatably connected to each mounting block, and a drive motor is fixedly connected to each mounting block. The drive motor communicates with the drive rod. Two half-tooth gears are fixedly connected to the middle of the drive rod, and the two half-tooth gears are equidistantly arranged on the drive rod. A connecting block is fixedly connected to the top of the switch plate, and a switch tooth plate is fixedly connected to the connecting block. The switch tooth plate meshes with the half-tooth gears. A drive wheel is fixedly connected to one end of the drive rod, and a belt is sleeved on the drive wheel. The other end of the belt is sleeved on the driven wheel.

[0011] In a preferred embodiment, the storage unit includes a storage frame, on which a placement tray is fixedly connected. Multiple placement trays are provided and are equidistantly arranged on the storage frame. Two lifting blocks are fixedly connected to the storage frame and are symmetrically arranged on both sides of the storage frame.

[0012] In a preferred embodiment, a limiting post is fixedly connected to the storage frame, a collection plate is rotatably connected to the limiting post, a flipping post is rotatably connected to the other end of the collection plate, a flipping wheel is fixedly connected to the flipping post, two flipping wheels are provided and symmetrically arranged at both ends of the flipping post, a flipping groove is provided on the storage frame, the flipping wheel is slidably disposed in the flipping groove, a collection groove is provided on the collection plate, and an installation post is fixedly connected inside the processing bucket, two installation posts are provided and equidistantly arranged inside the processing bucket, and a lifting block is fixedly connected to the installation post.

[0013] In a preferred embodiment, the refrigeration unit includes a refrigeration housing, which is fixedly disposed at one end of the processing tank. A refrigeration column is rotatably connected inside the refrigeration housing, and a refrigeration motor is fixedly connected to the outside of the refrigeration housing. The refrigeration motor communicates with the refrigeration column, and fan blades are fixedly connected to the refrigeration column.

[0014] In a preferred embodiment, a switch block is fixedly connected to the end of the processing tank away from the refrigeration housing, a switch column is rotatably connected to the switch block, a compartment door is fixedly connected to the switch column, an operator is fixedly connected to the compartment door, and a handle is fixedly connected to the compartment door.

[0015] The present invention also provides a process for manufacturing nickel-based alloy valve body forgings using the above-mentioned heat treatment equipment, comprising the following steps:

[0016] S1: Select a nickel-based alloy ingot, clean the surface defects, and then hot forge it at 1100~1200℃ to form a valve body preform. Air cool it to room temperature, and then forge the valve body preform again into a precision forging blank.

[0017] S2: Place the precision forging billet in an orderly manner on the placement unit tray inside the heat treatment barrel, fix the placement unit, close the chamber door inside the treatment barrel, and start the processing inside the treatment barrel;

[0018] S3: Argon or nitrogen gas is introduced into the hot chamber of the processing barrel at a flow rate of 0.5-1 m³ / h to form a slight positive pressure in the hot chamber; the heating module is started to heat the billet to 850-950℃ and hold it for 4-6 hours to eliminate the internal stress of forging.

[0019] S4: Drive the sliding unit inside the processing tank to transfer the storage unit to the cold compartment, and simultaneously realize the automatic separation of the hot and cold compartments through the switching unit to prevent temperature exchange;

[0020] S5: Start the refrigeration unit to control the cooling of the billet at a rate of 5~10℃ / h, cooling it to room temperature; during the transfer process, the collection structure inside the processing drum is used to collect the spilled oil and debris from the billet, avoiding workpiece contamination;

[0021] S6: The reciprocating screw in the processing barrel then transfers the storage unit back to the hot chamber for secondary heating and reheating. After the heat treatment, the blank is sent to the cold chamber. At this time, the refrigeration unit is not started again, and the blank is allowed to naturally cool down to room temperature in the cold chamber.

[0022] S7: Open the silo door and take out the die forging. After cleaning the surface impurities, perform dimensional accuracy, internal structure and mechanical property tests. If the test is qualified, it is a finished product.

[0023] The beneficial effects of this invention are as follows:

[0024] 1. This invention uses a reciprocating screw to drive the epitaxial block, which carries the sliding block, to move into the cold chamber inside the processing tank. Then, the refrigeration unit in the cold chamber cools the nickel-based alloy valve body forging. Finally, the sliding block and sliding rod send the nickel-based alloy valve body forging back to the hot chamber for reheating. This design avoids the cumbersome process of disassembling the storage frame when picking up and putting down the parts. At the same time, the furnace temperature drops quickly during disassembly, and subsequent secondary heating wastes resources.

[0025] 2. This invention is driven by a drive motor on the mounting block. The drive motor drives the drive rod to rotate, which in turn causes two half-tooth gears to rotate. The rotating half-tooth gears mesh with the switch gear plate, causing the connecting block to separate the switch plate. When the two switch plates separate, the support block and support column also move upward, causing the spring sleeved on the support column to stretch. When the half-tooth gears no longer mesh with the switch gear plate, the switch gear plate loses its force. At this time, the spring releases its elastic potential energy, pushing the switch plate back to its original position. The elastic potential energy of the spring is set to be greater than the weight of the switch plate, so that the switch plate can return to its original position, preventing the cold and hot compartments in the processing tank from communicating with each other.

[0026] 3. In this invention, a lifting block is inserted below the collecting plate, and the lifting block gradually thickens. This allows the tilting wheel to move within the tilting groove, causing the collecting plate to tilt slowly. This allows the waste oil in the collecting groove to drain into the cold chamber, where it is cleaned after processing. This design prevents waste oil and debris from dripping onto the nickel-based alloy valve body forging below. It also prevents waste oil and debris from splashing onto the nickel-based alloy valve body forging due to excessive waste oil in the collecting groove during the movement of the sliding block carrying the storage frame. The lifting block on the storage frame allows a robotic arm or manual tool to easily remove the storage frame from the processing bucket when it needs to be removed. The fixing plate is also inserted into the lifting block to ensure the stability of the storage frame during movement. Attached Figure Description

[0027] Figure 1 This is a front and side view of the overall structure of the present invention;

[0028] Figure 2 This is a cross-sectional schematic diagram of the processing tank of the present invention;

[0029] Figure 3 This is a schematic diagram of the sliding unit in this invention;

[0030] Figure 4 For the present invention Figure 3 Enlarged schematic diagram of the structure at point A;

[0031] Figure 5 This is a schematic diagram of the switching unit in this invention;

[0032] Figure 6 This is a schematic diagram of the structure of the storage unit in this invention;

[0033] Figure 7 For the present invention Figure 7 Enlarged schematic diagram of the structure at point B;

[0034] Figure 8 This is a schematic diagram of the refrigeration unit in this invention;

[0035] Figure 9 This is a schematic diagram of the rear side of the overall structure of the present invention;

[0036] Figure 10 This is a schematic diagram of the manufacturing process of the present invention.

[0037] In the diagram: 1. Processing tank; 2. Support leg; 3. Inlet pipe; 4. Switch valve; 5. Door; 6. Switch block; 7. Switch column; 8. Operator; 9. Handle; 10. Switch unit; 1001. Switch plate; 1002. Support block; 1003. Support column; 1004. Spring; 1005. Connecting block; 1006. Switch gear plate; 1007. Drive rod; 1008. Mounting block; 1009. Drive motor; 1010. Half gear; 1011. Drive wheel; 1012. Belt; 11. Refrigeration unit; 1101. Refrigeration housing; 1102. Refrigeration column; 1103. Fan blade; 11 04. Refrigeration motor; 12. Sliding unit; 1201. Fixed frame; 1202. Fixed block; 1203. Sliding rod; 1204. Sliding block; 1205. Reciprocating screw; 1206. Driven wheel; 1207. Fixed plate; 1208. Placement block; 1209. Placement column; 1210. Extension block; 13. Storage unit; 1301. Storage frame; 1302. Placement tray; 1303. Restriction column; 1304. Collection plate; 1305. Collection trough; 1306. Lifting block; 1307. Tilting trough; 1308. Tilting wheel; 1309. Tilting column; 14. Mounting column; 15. Lifting block. Detailed Implementation

[0038] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0039] like Figures 1 to 4 As shown, a heat treatment device for nickel-based alloy valve body forgings includes a treatment tank 1, with support feet 2 installed at the bottom of the treatment tank 1. An air inlet pipe 3 is installed on the outside of the treatment tank 1, and a switch valve 4 is fixedly installed on the air inlet pipe 3. A storage unit 13 for supporting the nickel-based alloy valve body forgings is movably arranged inside the treatment tank 1. The treatment tank 1 also includes a sliding unit 12, a switch unit 10, and a cooling unit 11. The sliding unit 12 is used to drive the storage unit 13 to move laterally, the switch unit 10 is used to isolate and seal the interior of the treatment tank 1, and the cooling unit 11 is used to process the valve body forgings inside the treatment tank 1. The components are cooled; the sliding unit 12 includes multiple fixed blocks 1202, which are equidistantly and uniformly fixed to the inner wall of the processing barrel 1. Each fixed block 1202 is fixedly connected to a fixed frame 1201. Two sliding rods 1203 are fixedly connected to the fixed frame 1201. The two sliding rods 1203 are symmetrically arranged on both sides of the fixed frame 1201. A sliding block 1204 is slidably connected to the sliding rod 1203. The sliding block 1204 is connected to the storage unit 13 and is used to drive the storage unit 13 to slide along the sliding rod 1203.

[0040] It should be noted that the processing tank 1 is divided into two parts by the switching unit 10. One side is a cold compartment with the refrigeration unit 11 installed, and the other side is a hot compartment with a heating module. The heating module in the hot compartment is composed of a resistor and a radiant tube. The resistor and radiant tube are existing technologies and are not shown in the figure. The fixing blocks 1202 are arranged in groups of three at equal intervals on the fixing frame 1201. There are two fixing frames 1201, which are respectively set at both ends inside the processing tank 1. This allows the sliding rod 1203 to pass through the cold compartment and the hot compartment.

[0041] Refer to the instruction manual appendix Figure 3 and Figure 4 As shown, the sliding unit 12 further includes a reciprocating screw 1205, which is rotatably disposed inside the processing barrel 1. An extension block 1210 is fixedly connected to the sliding block 1204. The extension block 1210 is rotatably connected to the reciprocating screw 1205. A driven wheel 1206 is fixedly connected to one end of the reciprocating screw 1205.

[0042] It should be noted that when the driven wheel 1206 rotates, it causes the reciprocating screw 1205 to rotate. The reciprocating screw 1205 is provided with a reciprocating threaded groove (this is a mature existing technology). Thus, when the reciprocating screw 1205 rotates, the extension block 1210 causes the sliding block 1204 to reciprocate on the sliding rod 1203.

[0043] Refer to the instruction manual appendix Figure 3 and Figure 4 As shown, further, a mounting block 1208 is fixedly connected to the sliding block 1204. There are two mounting blocks 1208, and the two sets of mounting blocks 1208 are symmetrically arranged on the sliding block 1204. A mounting column 1209 is fixedly connected to the mounting block 1208, and a fixing plate 1207 is rotatably connected to the mounting column 1209.

[0044] It should be noted that the fixing plate 1207 needs to be manually moved. Before the storage unit 13 is placed on the sliding block 1204, the staff first moves the fixing plate 1207 to keep it in a vertical position. After the storage unit 13 is placed on the sliding block 1204, the staff moves the fixing plate 1207 to make it snap into the storage unit 13.

[0045] In this embodiment, the specific implementation scenario is as follows: the nickel-based alloy valve body forging is placed on the storage unit 13, and then the storage unit 13 with the nickel-based alloy valve body forging is placed on the sliding block 1204 by a robotic arm or manual lifting. The sliding block 1204 slides on the sliding rod 1203, and the nickel-based alloy valve body forging placed on the sliding block 1204 is sent to the middle of the hot chamber. Then, it is heated by the resistance + radiation tube in the hot chamber, and the switch valve 4 on the air inlet pipe 3 is opened to fill the hot chamber with argon or nitrogen to prevent oxidation or decarburization of the nickel-based alloy valve body forging, so that the internal stress of the nickel-based alloy valve body forging can be eliminated during the heating process. To prevent deformation of the nickel-based alloy valve body forging during actual use, the nickel-based alloy valve body forging needs to be cooled under controlled conditions after heating. At this time, the reciprocating screw 1205 drives the extension block 1210 to move the sliding block 1204 into the cold chamber in the processing tank 1. Then, the refrigeration unit 11 in the cold chamber cools down the nickel-based alloy valve body forging. Then, the sliding block 1204 and sliding rod 1203 are used to send the nickel-based alloy valve body forging back to the hot chamber for reheating. This setting avoids the cumbersome operation process of disassembling the storage frame 1301 when picking up and putting down the parts. At the same time, the temperature inside the furnace drops quickly during disassembly, and subsequent secondary heating wastes resources.

[0046] Refer to the instruction manual appendix Figure 5 and Figure 9As shown, when the sliding block 1204 carries the nickel-based alloy valve body forging into the cold chamber of the processing barrel 1, if there is no barrier between the hot chamber and the cold chamber, the heat in the hot chamber will enter the cold chamber. This will cause the nickel-based alloy valve body forging to remain at a high temperature during cooling and thus fail to complete the cooling process.

[0047] To solve this problem, the present invention also provides the following technical solution: the switch assembly includes a switch plate 1001, two switch plates 1001 are provided, and the two switch plates 1001 are symmetrically slidably disposed in the processing tank 1. A support block 1002 is fixedly connected to the switch plate 1001, two support blocks 1002 are provided, and the two support blocks 1002 are symmetrically arranged on the switch plate 1001. A support column 1003 is fixedly connected to the support block 1002, the support column 1003 penetrates the processing tank 1, and a spring 1004 is sleeved on the support column 1003. The two ends of the spring 1004 are fixedly connected to the support column 1003 and the processing tank 1, respectively.

[0048] It should be noted that the switch plate 1001 has holes in the sliding column. Although the two holes at the sliding column facilitate the smooth passage of the sliding block 1204, the switch plate 1001 can be closed to prevent heat or cold air from passing through. The support column 1003 is designed with a sufficiently long stroke. The entire switch plate 1001 is larger than the storage unit 13. This is so that when the storage unit 13 moves to the vicinity of the switch plate 1001, there is enough space for the storage unit 13 to pass through. When the storage unit 13 passes through, the switch plate 1001 also moves upward under the action of the support column 1003 to allow the storage unit 13 to pass through a sufficient gap.

[0049] Refer to the instruction manual appendix Figure 5 and Figure 9 As shown, the switch assembly further includes mounting blocks 1008. Two mounting blocks 1008 are provided, and the two mounting blocks 1008 are symmetrically fixedly mounted on the outer wall of the processing tank 1. A drive rod 1007 is rotatably connected to the mounting block 1008, and a drive motor 1009 is fixedly connected to the mounting block 1008. The drive motor 1009 communicates with the drive rod 1007. A semi-gear 1010 is fixedly connected to the middle of the drive rod 1007. The semi-gear 1010 is... There are two gears, and the two half-tooth gears 1010 are equidistantly arranged on the drive rod 1007. A connecting block 1005 is fixedly connected to the top of the switch plate 1001. A switch tooth plate 1006 is fixedly connected to the connecting block 1005. The switch tooth plate 1006 meshes with the half-tooth gears 1010. A drive wheel 1011 is fixedly connected to one end of the drive rod 1007. A belt 1012 is sleeved on the drive wheel 1011. The other end of the belt 1012 is sleeved on the driven wheel 1206.

[0050] It should be noted that the switch gear plates 1006 are arranged one above the other on the switch plate 1001, and the half-tooth gears 1010 are arranged one in the forward direction and one in the reverse direction on the drive rod 1007. In this way, when the drive rod 1007 is rotated, the switch plate 1001 immediately separates or moves towards the middle. The half-tooth gears 1010 are also set accordingly to allow the storage unit 13 to pass through the switch plate 1001.

[0051] In this embodiment, the specific implementation scenario is as follows: Driven by the drive motor 1009 on the mounting block 1008, the drive motor 1009 drives the drive rod 1007 to rotate. The rotating drive rod 1007 causes the two half-tooth gears 1010 to rotate. The rotating half-tooth gears 1010 mesh with the switch gear plate 1006, thereby causing the connecting block 1005 to drive the switch plate 1001 to separate. When the two switch plates 1001 separate, the support block 1002 and the support column 1003 will also... The device moves upward, causing the spring 1004, which is sleeved on the support column 1003, to stretch. When the half gear 1010 is not engaged with the switch plate 1006, the switch plate 1006 loses its force. At this time, the spring 1004 releases its elastic potential energy, pushing the switch plate 1001 back to its original position. The elastic potential energy of the spring 1004 is set to be greater than the weight of the switch plate 1001, so that the switch plate 1001 can return to its original position, preventing the cold and hot compartments in the processing tank 1 from communicating with each other.

[0052] Refer to the instruction manual appendix Figure 2 and Figure 6 As shown, when the nickel-based alloy valve body forging is hammered, it will adhere to dirty oil, debris and other substances. When heated in the treatment tank 1, the high temperature will melt the dirty oil and cause it to fall off the nickel-based alloy valve body forging. Because the heat treatment is carried out in large quantities, the detached dirty oil will fall onto the nickel-based alloy valve body forging below, thus making the nickel-based alloy valve body forging below dirty.

[0053] To solve this problem, the present invention also provides the following technical solution: the storage unit 13 includes a storage frame 1301, a placement tray 1302 is fixedly connected to the storage frame 1301, a plurality of placement trays 1302 are provided, and the plurality of placement trays 1302 are equidistantly arranged on the storage frame 1301, and a lifting block 1306 is fixedly connected to the storage frame 1301, two lifting blocks 1306 are provided, and the two lifting blocks 1306 are symmetrically arranged on both sides of the storage frame 1301.

[0054] It should be noted that the number of placement trays 1302 on the storage frame 1301 can be adjusted according to the actual situation. The bottom of the storage tray is provided with holes to facilitate the flow of oil and debris from the nickel-based alloy valve body forging to the bottom.

[0055] Refer to the instruction manual appendix Figure 6 and Figure 7 As shown, further, a limiting post 1303 is fixedly connected to the storage frame 1301, a collection plate 1304 is rotatably connected to the limiting post 1303, a flipping post 1309 is rotatably connected to the other end of the collection plate 1304, a flipping wheel 1308 is fixedly connected to the flipping post 1309, two flipping wheels 1308 are provided, and the two flipping wheels 1308 are symmetrically arranged at both ends of the flipping post 1309, a flipping groove 1307 is provided on the storage frame 1301, the flipping wheel 1308 is slidably disposed in the flipping groove 1307, a collection groove 1305 is provided on the collection plate 1304, an installation post 14 is fixedly connected to the processing bucket 1, two installation posts 14 are provided, and the two installation posts 14 are equidistantly arranged in the processing bucket 1, a lifting block 15 is fixedly connected to the installation post 14.

[0056] It should be noted that the flipping wheel 1308 is confined within the flipping groove 1307, so that the collection plate 1304 will not detach from the storage frame 1301. There are two collection grooves 1305 on the collection plate 1304, which are respectively arranged at both ends of the collection plate 1304. The bottom of the collection grooves 1305 is open, so that the two collection grooves 1305 can be connected.

[0057] In this embodiment, the specific implementation scenario is as follows: The nickel-based alloy valve body forging is placed in the placement tray 1302 on the storage frame 1301. When the nickel-based alloy valve body forging is heated, the oily residue falls off and onto the collection plate 1304. The collection plate 1304 is designed with a raised center and lower sides, so the oily residue dripping onto the collection plate 1304 flows into the collection groove 1305. To prevent excessive accumulation of oily residue in the collection groove 1305, which could overflow and spill onto the nickel-based alloy valve body forging, when the sliding block 1204 moves the storage frame 1301 towards the cold chamber, the cold chamber contains the mounting column 14 and the lifting block 15. The lifting block 15 is inserted below the collection plate 1304, and it gradually thickens, allowing the tilting wheel 1308 to move within the tilting groove 1307. This causes the collecting plate 1304 to tilt slowly, allowing the sludge in the collecting tank 1305 to drain into the cold chamber. After processing, the tank will be cleaned. This design prevents sludge and debris from dripping onto the nickel-based alloy valve body forging below. It also prevents sludge and debris from splashing onto the nickel-based alloy valve body forging due to excessive sludge in the collecting tank 1305 when the sliding block 1204 moves with the storage frame 1301. The lifting block 1306 on the storage frame 1301 is for when the storage frame 1301 needs to be removed. A robotic arm or a person can insert a tool into the lifting block 1306 to allow the storage frame 1301 to be easily removed from the processing tank 1. The fixing plate 1207 is also inserted into the lifting block 1306 to keep the storage frame 1301 stable during movement.

[0058] Refer to the instruction manual appendix Figure 2 and Figure 8 As shown, the refrigeration unit 11 includes a refrigeration housing 1101, which is fixedly disposed at one end of the processing tank 1. A refrigeration column 1102 is rotatably connected inside the refrigeration housing 1101. A refrigeration motor 1104 is fixedly connected to the outside of the refrigeration housing 1101. The refrigeration motor 1104 is connected to the refrigeration column 1102. A fan blade 1103 is fixedly connected to the refrigeration column 1102.

[0059] In this embodiment, the specific implementation scenario is as follows: the cooling motor 1104 drives the cooling column 1102 inside the cooling housing 1101 to rotate. The rotating cooling column 1102 drives the fan blade 1103 to rotate, thereby driving the airflow to cool and control the temperature of the nickel-based alloy valve body forging.

[0060] Refer to the instruction manual appendix Figure 1 and Figure 2 As shown, a switch block 6 is fixedly connected to the end of the processing tank 1 away from the refrigeration shell 1101. A switch column 7 is rotatably connected to the switch block 6. A compartment door 5 is fixedly connected to the switch column 7. An operator 8 is fixedly connected to the compartment door 5. A handle 9 is fixedly connected to the compartment door 5.

[0061] In this embodiment, the specific implementation scenario is as follows: when it is necessary to place the nickel-based alloy valve body forging and the storage unit 13, hold the handle 9 on the door 5 and let the switch column 7 on the door 5 rotate on the switch block 6, so as to separate the door 5 from the processing tank 1. After placement, close the door 5 and set the operator 8 on the door 5 to make the processing tank 1 work.

[0062] Refer to the instruction manual appendix Figure 10 As shown, the present invention also provides a process for manufacturing nickel-based alloy valve body forgings using the above-mentioned heat treatment equipment, specifically including the following steps:

[0063] S1: Select a nickel-based alloy ingot, clean the surface defects, and then hot forge it at 1100~1200℃ to form a valve body preform. Air cool it to room temperature, and then forge the valve body preform again into a precision forging blank.

[0064] S2: Place the precision forging billet in the placement unit 13 placement tray 1302 inside the heat treatment barrel 1 in an orderly manner. After fixing the placement unit 13, close the inner door 5 of the treatment barrel 1 and start the processing inside the treatment barrel 1.

[0065] S3: Argon or nitrogen gas is introduced into the hot chamber of the treatment barrel 1 at a flow rate of 0.5-1 m³ / h to form a slight positive pressure in the hot chamber; the heating module is started to heat the billet to 850-950℃ and hold it for 4-6 hours to eliminate the internal stress of forging.

[0066] S4: Drive the sliding unit 12 inside the processing tank 1 to transfer the placement unit 13 to the cold compartment, and simultaneously realize the automatic separation of the hot and cold compartments through the switch unit 10 to prevent temperature exchange.

[0067] S5: Start the refrigeration unit 11 to control the cooling of the billet at a rate of 5~10℃ / h, cooling it to room temperature; during the transfer process, the collection structure inside the processing tank 1 completes the centralized collection of the billet's spilled oil and debris, avoiding workpiece contamination;

[0068] S6: The storage unit 13 is then transferred back to the hot chamber by the reciprocating screw 1205 in the processing tank 1 for secondary heating and temperature recovery. After the temperature recovery and heat treatment, the blank is sent to the cold chamber. At this time, the refrigeration unit 11 is no longer started, and the blank is allowed to naturally cool down to room temperature in the cold chamber.

[0069] S7: Open the silo door 5 to take out the die forging, clean the surface impurities, and then test the dimensional accuracy, internal structure, and mechanical properties. If the test is qualified, it is a finished product.

[0070] Working principle:

[0071] 1. Open the equipment door 5, place the precision forged parts evenly on the placement tray 1302 of the storage unit 13, move the fixing plate 1207 into the lifting block 1306 to complete the fixation, close the door 5 and start the equipment through the operator 8.

[0072] 2. Open valve 4 to fill the hot chamber with argon or nitrogen (0.5-1 m³ / h) to form a slight positive pressure, start the resistance + radiation tube heating module, heat the forging to 850-950℃ and hold for 4-6 hours to eliminate internal forging stress.

[0073] Third, the drive motor 1009 starts, causing the switch plate 1001 to separate. At the same time, the reciprocating screw 1205 is rotated through the belt 1012, which drives the sliding block 1204 to transfer the storage unit 13 to the cold compartment. After the storage unit 13 is in place, the switch plate 1001 is reset under the action of the spring 1004, realizing the separation of the hot and cold compartments.

[0074] Fourth, start the refrigeration unit 11, and generate cold airflow through the fan blades 1103 to cool the die forgings to room temperature (cooling rate 5~10℃ / h); during the transfer process, the lifting block 15 pushes the collection plate 1304 to tilt, and collects the dirty oil and debris that fall off the die forgings and discharges them to the bottom of the cold chamber.

[0075] Fifth, the storage unit 13 is then transferred back to the hot chamber by the reciprocating screw 1205 in the processing tank 1 for secondary heating and reheating. After the heat treatment, the blank is sent to the cold chamber. At this time, the refrigeration unit 11 is no longer started, and the blank is allowed to naturally cool down to room temperature in the cold chamber.

[0076] 6. Open the storage door 5 to release the storage unit 13 and take it out. After cleaning the impurities on the surface of the forging, conduct dimensional, structural and mechanical property tests. If it passes the tests, it is a finished product. If it fails the tests, it will be repaired or scrapped.

[0077] The embodiments of this example have been described above. However, this example is not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms based on the guidance of this example, and all of them are within the protection scope of this example.

Claims

1. A heat treatment device for a nickel-based alloy valve body forging, comprising a treatment tank (1), a support foot (2) installed at the bottom of the treatment tank (1), an air inlet pipe (3) installed on the outside of the treatment tank (1), and a switch valve (4) fixedly installed on the air inlet pipe (3), characterized in that: The processing barrel (1) is movably provided with a storage unit (13) for carrying nickel-based alloy valve body forgings. The processing barrel (1) is also provided with a sliding unit (12), a switching unit (10) and a cooling unit (11). The sliding unit (12) is used to drive the storage unit (13) to move laterally. The switching unit (10) is used to partition and seal the inside of the processing barrel (1). The cooling unit (11) is used to cool the valve body forgings inside the processing barrel (1). The sliding unit (12) includes multiple fixed blocks (1202), which are equidistantly and uniformly fixed to the inner wall of the processing barrel (1). Each fixed block (1202) is fixedly connected to a fixed frame (1201), and two sliding rods (1203) are fixedly connected to the fixed frame (1201). The two sliding rods (1203) are symmetrically arranged on both sides of the fixed frame (1201), and a sliding block (1204) is slidably connected to the sliding rod (1203). The sliding block (1204) is connected to the storage unit (13), and the sliding block (1204) is used to drive the storage unit (13) to slide along the sliding rod (1203).

2. The heat treatment equipment for a nickel-based alloy valve body forging according to claim 1, characterized in that: The sliding unit (12) also includes a reciprocating screw (1205), which is rotatably disposed inside the processing barrel (1). An extension block (1210) is fixedly connected to the sliding block (1204), and the extension block (1210) is rotatably connected to the reciprocating screw (1205). A driven wheel (1206) is fixedly connected to one end of the reciprocating screw (1205).

3. The heat treatment equipment for a nickel-based alloy valve body forging according to claim 2, characterized in that: A mounting block (1208) is fixedly connected to the sliding block (1204). There are two mounting blocks (1208), and the two sets of mounting blocks (1208) are symmetrically arranged on the sliding block (1204). A mounting column (1209) is fixedly connected to the mounting block (1208), and a fixing plate (1207) is rotatably connected to the mounting column (1209).

4. The heat treatment equipment for a nickel-based alloy valve body forging according to claim 3, characterized in that: The switch assembly includes a switch plate (1001), two switch plates (1001) are provided, and the two switch plates (1001) are symmetrically slidably disposed in the processing barrel (1). A support block (1002) is fixedly connected to the switch plate (1001), two support blocks (1002) are provided, and the two support blocks (1002) are symmetrically arranged on the switch plate (1001). A support column (1003) is fixedly connected to the support block (1002), the support column (1003) penetrates the processing barrel (1), and a spring (1004) is sleeved on the support column (1003). The two ends of the spring (1004) are fixedly connected to the support column (1003) and the processing barrel (1) respectively.

5. The heat treatment equipment for a nickel-based alloy valve body forging according to claim 4, characterized in that: The switch assembly further includes mounting blocks (1008), of which two are provided and symmetrically fixed on the outer wall of the processing tank (1). A drive rod (1007) is rotatably connected to each mounting block (1008), and a drive motor (1009) is fixedly connected to each mounting block (1008). The drive motor (1009) communicates with the drive rod (1007), and a half-tooth gear (1010) is fixedly connected to the middle of the drive rod (1007). Two half-tooth gears (1010) are provided. Two half-tooth gears (1010) are equidistantly arranged on the drive rod (1007). A connecting block (1005) is fixedly connected to the top of the switch plate (1001). A switch tooth plate (1006) is fixedly connected to the connecting block (1005). The switch tooth plate (1006) meshes with the half-tooth gears (1010). A drive wheel (1011) is fixedly connected to one end of the drive rod (1007). A belt (1012) is sleeved on the drive wheel (1011). The other end of the belt (1012) is sleeved on the driven wheel (1206).

6. The heat treatment equipment for a nickel-based alloy valve body forging according to claim 5, characterized in that: The storage unit (13) includes a storage frame (1301), on which a placement tray (1302) is fixedly connected. Multiple placement trays (1302) are provided, and the multiple placement trays (1302) are arranged equidistantly on the storage frame (1301). Lifting blocks (1306) are fixedly connected to the storage frame (1301). Two lifting blocks (1306) are provided, and the two lifting blocks (1306) are symmetrically arranged on both sides of the storage frame (1301).

7. The heat treatment equipment for a nickel-based alloy valve body forging according to claim 6, characterized in that: A limiting post (1303) is fixedly connected to the storage frame (1301). A collecting plate (1304) is rotatably connected to the limiting post (1303). A flipping post (1309) is rotatably connected to the other end of the collecting plate (1304). A flipping wheel (1308) is fixedly connected to the flipping post (1309). There are two flipping wheels (1308), and the two flipping wheels (1308) are symmetrically arranged at both ends of the flipping post (1309). The frame (1301) is provided with a flip groove (1307), the flip wheel (1308) is slidably disposed in the flip groove (1307), the collection plate (1304) is provided with a collection groove (1305), the processing bucket (1) is fixedly connected with a mounting column (14), there are two mounting columns (14), and the two mounting columns (14) are equidistantly arranged in the processing bucket (1), and a lifting block (15) is fixedly connected to the mounting column (14).

8. The heat treatment equipment for a nickel-based alloy valve body forging according to claim 7, characterized in that: The refrigeration unit (11) includes a refrigeration shell (1101), which is fixedly disposed at one end of the processing tank (1). A refrigeration column (1102) is rotatably connected inside the refrigeration shell (1101), and a refrigeration motor (1104) is fixedly connected to the outside of the refrigeration shell (1101). The refrigeration motor (1104) is connected to the refrigeration column (1102), and a fan blade (1103) is fixedly connected to the refrigeration column (1102).

9. The heat treatment equipment for a nickel-based alloy valve body forging according to claim 8, characterized in that: A switch block (6) is fixedly connected to one end of the processing tank (1) away from the refrigeration shell (1101). A switch column (7) is rotatably connected to the switch block (6). A door (5) is fixedly connected to the switch column (7). An operator (8) is fixedly connected to the door (5). A handle (9) is fixedly connected to the door (5).

10. A manufacturing process, characterized in that, The manufacture of nickel-based alloy valve body forgings using the heat treatment equipment described in claim 9 includes the following steps: S1: Select a nickel-based alloy ingot, clean the surface defects, and then hot forge it at 1100~1200℃ to form a valve body preform. Air cool it to room temperature, and then forge the valve body preform again into a precision forging blank. S2: Place the precision forging billet in the placement tray (1302) of the placement unit (13) in the heat treatment barrel (1), fix the placement unit (13), close the inner door (5) of the treatment barrel (1), and start the processing inside the treatment barrel (1); S3: Argon or nitrogen gas is introduced into the hot chamber of the treatment tank (1) at a flow rate of 0.5-1 m³ / h, so that the hot chamber forms a slight positive pressure; Start the heating module to heat the billet to 850~950℃ and hold it for 4~6 hours to eliminate internal forging stress; S4: Drive the sliding unit (12) inside the processing tank (1) to transfer the placement unit (13) to the cold storage, and simultaneously realize the automatic separation of the hot and cold storage through the switch unit (10) to avoid temperature exchange; S5: Start the refrigeration unit (11) to control the cooling of the billet at a rate of 5~10℃ / h, and cool it to room temperature; during the transfer process, the collection structure inside the processing bucket (1) is used to collect the spilled oil and debris from the billet, thus avoiding contamination of the workpiece; S6: The storage unit (13) is then transferred back to the hot chamber by the reciprocating screw (1205) in the processing tank (1) for secondary heating and temperature recovery. After the temperature recovery and heat treatment, the blank is sent to the cold chamber. At this time, the refrigeration unit (11) is not started again, and the blank is allowed to naturally cool down to room temperature in the cold chamber. S7: Open the warehouse door (5) and take out the die forging. After cleaning the surface impurities, perform dimensional accuracy, internal structure and mechanical properties testing. If the test is qualified, it is a finished product.

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