Alloy steel forged ring heat treatment deformation control device and heat treatment method thereof

Abstract

The invention provides an alloy steel forged ring heat treatment deformation control device and a heat treatment method thereof. The alloy steel forged ring heat treatment deformation control device comprises a clamping block assembly and a tool assembly. The tool assembly forms first extending ends horizontally and radially extending in at least three directions, the first extending ends are evenly arranged in the circumferential direction of the alloy steel forging ring at intervals, and the bottom walls of the first extending ends abut against the top wall of the alloy steel forging ring located below the first extending ends. The tool assembly forms second extending ends horizontally and radially extending from the center point to at least three directions, the included angles between the adjacent second extending ends are the same, and the second extending ends abut against the inner ring wall of the alloy steel forged ring. The number of the tool assemblies is the same as that of the alloy steel forging rings, and the alloy steel forging rings and the first extending ends of the tool assemblies are sequentially and alternately stacked in the axial direction. The clamping block assembly is arranged on the ring walls of the at least two alloy steel forged rings in a sleeving mode and is clamped and fixed. The heat treatment deformation control device has the effects that the heat treatment machining efficiency of the large alloy steel forged rings is improved, and the heat treatment deformation control device can treat the multiple alloy steel forged rings at the same time.

Description

Technical Field

[0001] This invention belongs to the field of metal processing technology, specifically relating to a heat treatment deformation control device and heat treatment method for a large alloy steel forged ring. Background Technology

[0002] With the continuous development of aerospace technology, the application demand for large alloy steel forged rings is constantly increasing. Large alloy steel forged rings require heat treatment strengthening through "quenching + tempering". For the heat treatment of large alloy steel forged rings, on the one hand, there is significant structural and thermal stress during quenching; when the stress exceeds the material's yield strength, heat treatment deformation occurs. On the other hand, the forged ring wall is relatively thick, making it difficult to quench through using conventional heat treatment methods. This necessitates increasing the quenching cooling rate, further increasing the thermal stress during quenching and making heat treatment deformation control even more difficult.

[0003] Patent document CN214032629U discloses a heat treatment frame for alloy rings, including a frame and support rods for placing the alloy rings. The frame is annular, and the support rods are arranged sequentially along the circumference of the frame, with the extension direction of the support rods parallel to the radial direction of the frame. The heat treatment frame for alloy rings provided by this invention, by utilizing the annular frame and the support rods to effectively support the alloy rings, ensures a better fit between the alloy rings and the support rods, preventing warping deformation of the forged rings during heat treatment.

[0004] However, patent document CN214032629U controls the deformation of alloy steel forging rings through a mold, but the mold cannot simultaneously support multiple alloy steel forging rings of the same size, resulting in very low processing efficiency.

[0005] To improve the heat treatment efficiency of large alloy steel forged rings and enable the heat treatment deformation control device to process multiple alloy steel forged rings simultaneously, thus meeting the requirements for load-bearing capacity and deformation control of multiple alloy steel rings, this invention designs an alloy steel forged ring heat treatment deformation control device and its heat treatment method, solving the aforementioned problems. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the purpose of this invention is to provide a device for controlling the deformation of alloy steel forged rings during heat treatment and a heat treatment method thereof.

[0007] According to the present invention, a deformation control device for heat treatment of alloy steel forged ring includes: a clamping block assembly and a tooling assembly; The tooling assembly forms a first extension end that extends horizontally radially in at least three directions. The first extension ends are evenly spaced along the circumference of the alloy steel forged ring, and the bottom wall of the first extension end abuts against the top wall of the alloy steel forged ring located below it. The tooling assembly forms a second extension end that extends horizontally radially in at least three directions from the center point. The included angle between adjacent second extension ends is the same, and the second extension end abuts against the inner ring wall of the alloy steel forged ring. The number of tooling components is the same as that of alloy steel forged rings, and the alloy steel forged rings and the first extension end of the tooling components are stacked alternately along the axial direction. The clamping block assembly is sleeved on the ring wall of at least two alloy steel forged rings and clamped and fixed.

[0008] Preferably, the first extension end includes a mounting block and a pad; At least three evenly spaced blocks are placed at the top of the alloy steel forging ring, and the blocks are used to support the alloy steel forging rings stacked above. The pad is welded and fixed to the bottom of the block and is offset from the alloy steel forged ring. The pad is used to connect to the second extension end. The second extension includes a support ring, a support rod, and a reinforcing plate; The support ring shaft and the alloy steel forged ring shaft are coaxially arranged; At least three support rods are fixed to the side wall of the support ring and extend horizontally radially to abut against the inner ring wall of the alloy steel forged ring, with the same included angle between adjacent support rods; The reinforcing plate extends horizontally and is welded and fixed to the adjacent support rod.

[0009] Preferably, the height of the supporting ring is the same as the height of the alloy steel forging ring, and pads are provided to fill the gaps between the supporting rings. Pad support tooling components and alloy steel forging rings are provided on the ground and the furnace bottom plate.

[0010] Preferably, the support rod is an "H"-shaped steel, which consists of parallel flanges with intervals and a web connecting the flanges vertically. When in the assembled state, the flanges of the "H"-shaped steel are arranged in the horizontal direction.

[0011] Preferably, the midpoint of the vertical height of the support rod and the alloy steel forged ring are located on the same horizontal plane.

[0012] Preferably, the difference between the outer circle of the support rod and the diameter of the alloy steel forged ring is:

[0013] Where Δα represents the difference in linear expansion coefficients between the tooling component and the large alloy steel forged ring material, ΔT represents the difference between the quenching heating temperature and the room temperature, and Φ represents the inner diameter of the large alloy steel forged ring.

[0014] Preferably, the clamping block assembly includes an end clamping block, a gap clamping block, a screw, and a nut; The gap clamp abuts against the end walls of adjacent alloy steel forged rings; The end clamps are respectively set at the top of the alloy steel forged ring above the uppermost gap clamp and the bottom of the alloy steel forged ring below the lowermost gap clamp, and the end clamps abut against the adjacent alloy steel forged rings; The screw extends vertically and is respectively set on the inner and outer sides of the alloy steel forged ring. The screw is vertically inserted in the order of end clamping block, gap clamping block, and end clamping block. The nut is screwed onto the screw rod and positions the spacing between the end clamps.

[0015] Preferably, the clamping block assembly is fitted with two adjacent alloy steel forged rings, and the gap clamping block inside the clamping block assembly is one piece, which is disposed between the two adjacent alloy steel forged rings.

[0016] Preferably, the alloy steel forging ring heat treatment deformation control device is made of austenitic stainless heat-resistant steel.

[0017] According to the present invention, a heat treatment method using an alloy steel forged ring heat treatment deformation control device includes the following steps: Step S1: Use a crane to place the tooling assembly onto the alloy steel forging ring; Step S2: Place a pad on the support ring of the tooling assembly, punch holes in the pad, and tie it to the support ring with steel wire; Place another alloy steel forged ring on top of the stacking block and install the tooling components in the same way; Step S3: Connect the two adjacent alloy steel forged rings using clamping block assemblies, with the clamping block assemblies evenly distributed; Repeat steps S2 and S3 to continue stacking the alloy steel forging rings; Step S4: Use a crane and lifting equipment to lift the bundled alloy steel forging ring along with the alloy steel forging ring heat treatment deformation control device onto the heat treatment trolley. Place pads evenly on the bottom plate of the trolley to support the alloy steel forging ring and the supporting ring. After leveling, put it into the furnace for heating and heat preservation. Step S5: After the heat treatment is completed, use a crane and lifting equipment to transfer the alloy steel forging ring, along with the alloy steel forging ring heat treatment deformation control device, into the water tank; the cooling time estimation formula is:

[0018] Where D represents the effective thickness of the alloy steel forged ring, s represents seconds, and mm represents millimeters; After the water tank cooling is completed, the alloy steel forging ring and the alloy steel forging ring heat treatment deformation control device are quickly transferred to the oil tank and cooled to room temperature; Step S6: Temper the quenched alloy steel forging ring along with the alloy steel forging ring heat treatment deformation control device as a whole. After tempering, remove the alloy steel forging ring heat treatment deformation control device.

[0019] Compared with existing technologies, this invention has the following advantages: By constraining in both internal and axial directions, the heat treatment deformation of large alloy steel forging rings is effectively controlled, and multiple alloy steel forging rings can be processed at once using a stacking method. The deformation control device is made of stainless steel, whose coefficient of thermal expansion is slightly higher than that of alloy steel, achieving excellent internal support. Stainless steel has a certain degree of heat resistance, and the deformation control device can be reused multiple times after simple maintenance, reducing heat treatment costs. After the large alloy steel forging rings are assembled, they are quenched using a water-to-oil quenching method, solving the problem of incomplete quenching and low strength in thick forging rings. Attached Figure Description

[0020] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the top structure of the present invention.

[0021] Figure 2 yes Figure 1 A sectional view.

[0022] Figure 3 This is a cross-sectional view of the stacked components of the present invention.

[0023] The figure shows: 1. Support ring; 2. Support rod; 3. Reinforcing plate; 4. Block; 5. Pad; 6. Clamping block assembly; 61. Gap clamp; 62. End clamp; 63. Screw; 64. Nut; 7. Pad; 8. First extension end; 9. Second extension end. Detailed Implementation

[0024] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0025] like Figures 1-3As shown, a heat treatment deformation control device for alloy steel forged rings includes a clamping block assembly 6 and a tooling assembly. The tooling assembly forms first extension ends 8 extending horizontally radially in at least three directions. The first extension ends 8 are evenly spaced along the circumference of the alloy steel forged ring, and the bottom wall of the first extension end 8 abuts against the top wall of the alloy steel forged ring located below it. The tooling assembly forms second extension ends 9 extending horizontally radially in at least three directions from its center point. The included angle between adjacent second extension ends 9 is the same, and the second extension ends 9 abut against the inner ring wall of the alloy steel forged ring. The number of tooling assemblies is the same as the number of alloy steel forged rings, and the alloy steel forged rings and the first extension ends 8 of the tooling assembly are alternately stacked along the axial direction. The clamping block assembly 6 is sleeved on the ring wall of at least two alloy steel forged rings and clamps and fixes them.

[0026] The working principle of this application is as follows: the first extension end 8 of the tooling assembly is evenly distributed above the alloy steel forging ring as a support, so that the alloy steel forging ring can be stably stacked upwards. Multiple alloy steel forging rings are heat treated simultaneously, providing a prerequisite for mutual restraint between the alloy steel forging rings; the second extension end 9 of the tooling assembly is concentrically set with the alloy steel forging ring, and effectively controls the radial heat treatment deformation of the alloy steel forging ring through internal support, preventing the alloy steel forging ring from going out of round; the clamping block assembly 6 limits the alloy steel forging ring from the axial direction. Through the mutual restraint between the alloy steel forging rings, the heat treatment deformation of the alloy steel forging ring is effectively controlled, thereby obtaining a heat-treated alloy steel forging ring that meets the specifications.

[0027] Specifically, at the alternating vertical stacking of the first extension end 8 and the alloy steel forged ring, the bottom layer is the alloy steel forged ring, and the top layer is the first extension end 8 of the tooling assembly. The large alloy steel forged ring is quite heavy. After being connected to the tooling assembly, when the whole assembly is hoisted and transported, a lifting device is needed to support the bottom of the large alloy steel forged ring for lifting. The tooling assembly is placed on the alloy steel forged ring and will not slip during hoisting, otherwise it is easy to slip.

[0028] The first extension end 8 includes a mounting block 4 and a pad 5. At least three mounting blocks 4 are evenly spaced at the top of the alloy steel forging ring, and the mounting blocks 4 are used to support the alloy steel forging rings stacked above. The pad 5 is welded and fixed to the bottom of the mounting block 4 and is offset from the alloy steel forging ring. The pad 5 is used to connect to the second extension end 9, so that the first extension end 8 and the second extension end 9 form a whole.

[0029] In one embodiment, eight mounting blocks 4 are provided, and the included angle between the centers of adjacent mounting blocks 4 and the corresponding alloy steel forged rings is 45 degrees.

[0030] The second extension end 9 includes a supporting ring 1, supporting rods 2, and a reinforcing plate 3. The axis of the supporting ring 1 is coaxial with the axis of the alloy steel forged ring, and the presence of the supporting ring 1 makes it easier to manufacture tooling assemblies concentric with the alloy steel forged ring. At least three supporting rods 2 are fixed to the side wall of the supporting ring 1 and extend horizontally radially to abut against the inner ring wall of the alloy steel forged ring. The included angle between adjacent supporting rods 2 is the same, providing uniform support for the alloy steel forged ring. The reinforcing plate 3 extends horizontally and is welded and fixed to adjacent supporting rods 2 to enhance the structural stability of the supporting rods 2 and improve the overall structural stability of the tooling assembly.

[0031] Preferably, the height of the supporting ring 1 is the same as the height of the alloy steel forged ring. Pads 7 are provided at the gaps between the supporting rings 1 to fill and support the tooling assembly, effectively supporting it and preventing it from collapsing under its own weight during heating, which could lead to loss of shape control. Pads 7 are provided on the ground and furnace bottom plate to support the tooling assembly and the alloy steel forged ring. The pads 7 are used for elevation and support, preventing direct pressure damage to the clamping block assembly 6, and facilitating the lifting of the alloy steel forged ring and its shape control tooling into and out of the furnace.

[0032] Preferably, the support rod 2 is made of "H"-shaped steel with a cross-sectional shape resembling the letter "H". The "H"-shaped steel consists of parallel, spaced flanges and a web connecting the flanges vertically, providing good bending resistance and significantly reducing the weight of the alloy steel forging ring heat treatment deformation control device. During assembly, the flanges of the "H"-shaped steel are arranged horizontally to prevent water from accumulating above the support rod 2 during heat treatment, which could affect subsequent heat treatment processes.

[0033] In one embodiment, eight support rods 2 are provided, and the included angle between the support rods 2 is 45 degrees.

[0034] In a variation, the supporting ring 1 is a regular octagonal support body used to connect eight supporting rods 2.

[0035] Preferably, the thickness of the pad 5 is set according to the size of the alloy steel forged ring, so that the midpoint of the vertical height of the support rod 2 and the alloy steel forged ring are located on the same horizontal plane, so that the supporting force of the tooling components on the large alloy steel forged ring during the heat treatment process is uniform and the deformation is reduced.

[0036] In one embodiment, the pad 5 is welded to the end of the support rod 2 near the alloy steel forged ring, thereby reducing the overall weight of the tooling assembly and facilitating hoisting.

[0037] In one embodiment, the circumscribed circle diameter of the support rod 2 is smaller than the inner diameter of the alloy steel forged ring, thereby facilitating the installation and removal of the alloy steel forged ring. The difference between the circumscribed circle of the support rod 2 and the diameter of the alloy steel forged ring is:

[0038] Where Δα represents the difference in linear expansion coefficients between the tooling component and the large alloy steel forged ring material, ΔT represents the difference between the quenching heating temperature and the room temperature, and Φ represents the inner diameter of the large alloy steel forged ring.

[0039] The clamping block assembly 6 is used to limit the vertical deformation of the alloy steel forged ring. At least three clamping block assemblies 6 are circumferentially fitted onto the ring walls of vertically adjacent alloy steel forged rings, and the clamping block assemblies 6 on adjacent alloy steel forged rings are evenly arranged circumferentially. The clamping block assembly 6 includes end clamping blocks 62, gap clamping blocks 61, screws 63, and nuts 64. The gap clamping blocks 61 abut against the end walls of adjacent alloy steel forged rings. The end clamping blocks 62 are respectively located at the top end of the alloy steel forged ring above the uppermost gap clamping block 61 and the bottom end of the alloy steel forged ring below the lowermost gap clamping block 61, abutting against the nearest alloy steel forged ring. The screws 63 extend vertically and are respectively located on the inner and outer sides of the alloy steel forged rings, with the screws 63 vertically inserted in the order of end clamping blocks 62, gap clamping blocks 61, and end clamping blocks 62. The nuts 64 are screwed onto the screws 63 and position the spacing between the end clamping blocks 62.

[0040] The alloy steel forged rings connected by the clamping block assembly 6 form a whole. During the heat treatment process, the heat treatment deformation of two adjacent large alloy steel forged rings is mutually constrained by the connection of the clamping block assembly 6, thereby effectively reducing the axial deformation of the large alloy steel forged rings.

[0041] In one embodiment, the gap clamp 61 and the mounting block 4 have the same vertical height, which can effectively support the alloy steel forging ring.

[0042] In one embodiment, a single gap clamping block 61 is provided within a clamping block assembly 6, and the gap clamping block 61 is disposed between two adjacent alloy steel forging rings. End clamping blocks 62 are disposed at the uppermost and lowermost ends of two adjacent alloy steel forging rings. Furthermore, the aforementioned clamping block assembly 6 is disposed in all different combinations of adjacent alloy steel forging rings, and at least three of the aforementioned clamping block assemblies 6 are uniformly provided in adjacent alloy steel forging rings of the same combination.

[0043] In one embodiment, four alloy steel forged rings are stacked, and there are three groups of adjacent alloy steel forged rings with different combinations. Adjacent alloy steel forged rings of the same combination are provided with eight of the aforementioned clamping block assemblies 6. A total of twenty-four clamping block assemblies 6 are provided in the three groups of eight.

[0044] The alloy steel forged ring heat treatment deformation control device is made of austenitic stainless heat-resistant steel. The coefficient of thermal expansion of stainless heat-resistant steel is slightly higher than that of alloy steel. At room temperature, the tooling components are slightly smaller, making installation easier. After heating, the expansion is greater than that of the forged ring, effectively providing support. Austenitic stainless heat-resistant steel has good heat resistance, undergoes no phase transformation during heat treatment, and can withstand multiple heating and cooling cycles, thus extending the device's service life.

[0045] In one embodiment, the large alloy steel forging ring is made of 30CrMnSiA material, with an inner diameter of φ3600mm, an outer diameter of φ3800mm, and a height of 150mm. The heat treatment deformation control device for the alloy steel forging ring is made of 304 stainless steel.

[0046] The linear expansion coefficient (20-900℃) of the workpiece material 30CrMnSiA is approximately 12.73×10⁻⁶. -6 / ℃; The coefficient of linear expansion of 304 stainless steel (20-900℃) is approximately 18.33×10. -6 At 900℃, based on an inner diameter of 3600mm forging ring, the difference in expansion between the two materials is (18.33-12.73)×10. -6 × (900-20)×3600≈17.7mm. The outer diameter of the tooling component is φ3585mm to retain a certain supporting force. The difference between the outer diameter of the tooling component and the inner diameter of the large alloy steel forged ring is 15mm, which facilitates installation and disassembly at room temperature.

[0047] Support rod 2 is made of HW100×100×6×8mm HW steel. Pad plate 5 has a thickness of (150-100) / 2=25mm. The tooling components are connected by welding. Laying block 4 and pad block 7 use the same H-beams as described above.

[0048] The thermal expansion increment of the gap clamp 61 relative to the height of the alloy steel forged ring is:

[0049] Where Δα represents the difference in linear expansion coefficient between the gap clamp 61 and the large alloy steel forged ring material, ΔT represents the difference between the quenching heating temperature and the room temperature, and H represents the thickness of the gap clamp 61.

[0050] The gap clamp 61H is small, and the dimensional increment is also small. Taking the actual size as an example, it is approximately 6×10. -6 ×880×150=0.792mm, which can be ignored. This provides good radial deformation protection for the alloy steel forging ring without affecting the diameter expansion of the alloy steel forging ring.

[0051] In one embodiment, the pads 7 between the support rings 1 are perforated, and steel wires are used to pass through the holes in the pads 7 and tie them to the support rings 1 to prevent them from slipping off during heat treatment.

[0052] In one embodiment, the gap clamp 61 is made of the same specification "H" steel, the end clamp 62 is a φ40mm steel bar with holes, the screw 63 is M20, the nut 64 is easy to loosen when heated, and the nut 64 is reinforced by spot welding after tightening.

[0053] After the installation of the deformation control device for heat treatment of alloy steel forged rings is completed, the heat treatment of large alloy steel forged rings is carried out. Using a crane and lifting equipment, the bundled large alloy steel forged rings, along with the deformation control device, are hoisted onto a heat treatment trolley. Pads 7 are evenly placed on the trolley's bottom plate to support the alloy steel forged rings and the supporting ring 1 at the center of the tooling assembly. After leveling, the rings are placed in the furnace for heating and heat preservation. After heat preservation, the large alloy steel forged rings, along with the deformation control device, are transferred to a water tank using a crane and lifting equipment. After cooling in water for 90-100 seconds, they are quickly transferred to an oil tank and cooled to room temperature, a process known as "water quenching and oil cooling." The quenched large alloy steel forged rings, along with the deformation control device, are then tempered as a whole. After tempering, the tooling assembly and clamping block assembly 6 are removed, completing the heat treatment of the large alloy steel forged rings.

[0054] This embodiment also provides a heat treatment method using an alloy steel forged ring heat treatment deformation control device, the steps of which include: Step S1: Use a crane to place the tooling assembly onto the alloy steel forging ring.

[0055] Step S2: Place a pad 7 on the support ring 1 of the tooling assembly. The pad 7 should have holes drilled in it and be secured to the support ring 1 with steel wire to prevent it from slipping during heat treatment. Stack another alloy steel forged ring on top of the mounting block 4 and install the tooling assembly in the same manner.

[0056] Step S3: Use clamping block assembly 6 to connect the two adjacent alloy steel forged rings. The clamping block assembly 6 is evenly distributed.

[0057] Repeat steps S2 and S3 to continue stacking alloy steel forging rings. The total height of the alloy steel forging ring heat treatment deformation control device and the alloy steel forging rings should be lower than the effective heating zone height of the heat treatment equipment, and the total weight should meet the load requirements of the heat treatment equipment.

[0058] Step S4: Use a crane and lifting equipment to lift the bundled alloy steel forging ring along with the alloy steel forging ring heat treatment deformation control device onto the heat treatment trolley. The lifting equipment consists of at least three "L"-shaped hooks evenly distributed along the circumference. The "L"-shaped hooks extend vertically and then bend at the bottom before extending horizontally. The horizontally extended end supports the alloy steel forging ring. During lifting, the "L"-shaped hooks support the bottom of the large alloy steel forging ring. Pad blocks 7 are evenly placed on the trolley bottom plate to support the alloy steel forging ring and the supporting ring 1. After leveling, the ring is placed in the furnace for heating and heat preservation.

[0059] Step S5: After the heat treatment is completed, use a crane and lifting equipment to transfer the alloy steel forging ring along with the alloy steel forging ring heat treatment deformation control device to the water tank. The cooling time estimation formula is:

[0060] Where D represents the effective thickness of the alloy steel forged ring, s represents seconds, and mm represents millimeters.

[0061] After the water tank cooling is completed, the alloy steel forging ring and the alloy steel forging ring heat treatment deformation control device are quickly transferred to the oil tank and cooled to room temperature, which is called "water quenching and oil cooling".

[0062] Step S6: Temper the quenched alloy steel forging ring along with the alloy steel forging ring heat treatment deformation control device as a whole. After tempering, remove the alloy steel forging ring heat treatment deformation control device to complete the heat treatment of the alloy steel forging ring.

[0063] Alloy steel forged rings have relatively thick walls, and conventional oil quenching results in a shallow hardening depth. Water quenching increases the hardening depth by improving the quenching cooling rate. Combining water quenching with oil cooling can reduce structural stress, thereby reducing the tendency of alloy forged rings to crack. It should be noted that "water quenching and oil cooling" is a typical cooling method in the heat treatment industry and is not a method unique to this patent. This patent only optimizes the "water quenching and oil cooling" heat treatment cooling method based on the characteristics of alloy steel forged rings.

[0064] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0065] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A device for controlling the deformation of alloy steel forged rings during heat treatment, characterized in that, include: Clamping block assembly (6) and tooling assembly; The tooling assembly forms a first extension end (8) extending horizontally radially in at least three directions. The first extension ends (8) are evenly spaced along the circumference of the alloy steel forging ring. The bottom wall of the first extension end (8) abuts against the top wall of the alloy steel forging ring located below it. The tooling assembly forms a second extension end (9) extending horizontally radially in at least three directions from the center point. The included angle between adjacent second extension ends (9) is the same. The second extension end (9) abuts against the inner ring wall of the alloy steel forging ring. The tooling assembly is the same number as the alloy steel forging ring, and the alloy steel forging ring and the first extension end (8) of the tooling assembly are stacked alternately along the axial direction. The clamping block assembly (6) is sleeved on the ring wall of at least two alloy steel forged rings and clamped and fixed.

2. The alloy steel forged ring heat treatment deformation control device according to claim 1, characterized in that, The first extension end (8) includes a mounting block (4) and a pad (5); At least three stacking blocks (4) are evenly spaced at the top of the alloy steel forging ring. The stacking blocks (4) are used to support the alloy steel forging rings stacked above. The pad (5) is welded and fixed to the bottom of the block (4) and is offset from the alloy steel forging ring. The pad (5) is used to connect to the second extension end (9). The second extension end (9) includes a support ring (1), a support rod (2), and a reinforcing plate (3); The axis of the supporting ring (1) is coaxial with the axis of the alloy steel forged ring; At least three support rods (2) are fixed to the side wall of the support ring (1) and extend horizontally radially to abut against the inner ring wall of the alloy steel forged ring. The included angle between adjacent support rods (2) is the same. The reinforcing plate (3) extends horizontally and is welded and fixed to the adjacent support rod (2).

3. The deformation control device for heat treatment of alloy steel forged rings according to claim 2, characterized in that, The height of the supporting ring (1) is the same as the height of the alloy steel forging ring. The gap between the supporting rings (1) is filled with pads (7) for support. The ground and the furnace bottom plate are provided with pads (7) to support the tooling assembly and the alloy steel forging ring.

4. The alloy steel forged ring heat treatment deformation control device according to claim 2, characterized in that, The support rod (2) is an "H"-shaped steel. The "H"-shaped steel is composed of parallel flanges with intervals and a web between the vertically connected flanges. When in the assembled state, the flanges of the "H"-shaped steel are arranged in the horizontal direction.

5. The alloy steel forged ring heat treatment deformation control device according to claim 2, characterized in that, The support rod (2) and the midpoint of the vertical height of the alloy steel forged ring are located on the same horizontal plane.

6. The alloy steel forged ring heat treatment deformation control device according to claim 2, characterized in that, The difference between the outer circle of the support rod (2) and the diameter of the alloy steel forged ring is: Where Δα represents the difference in linear expansion coefficients between the tooling component and the large alloy steel forged ring material, ΔT represents the difference between the quenching heating temperature and the room temperature, and Φ represents the inner diameter of the large alloy steel forged ring.

7. The alloy steel forged ring heat treatment deformation control device according to claim 1, characterized in that, The clamping block assembly (6) includes an end clamping block (62), a gap clamping block (61), a screw (63), and a nut (64); The gap clamp (61) abuts against the end walls of adjacent alloy steel forged rings; The end clamps (62) are respectively set at the top of the alloy steel forged ring above the uppermost gap clamp (61) and the bottom of the alloy steel forged ring below the lowermost gap clamp (61), and the end clamps (62) abut against the adjacent alloy steel forged ring; The screw (63) extends vertically and is respectively set on the inner and outer sides of the alloy steel forging ring. The screw (63) is vertically inserted in the order of end clamp (62), gap clamp (61), and end clamp (62). Nut (64) is screwed onto screw (63) and positions the spacing between end clamps (62).

8. The alloy steel forged ring heat treatment deformation control device according to claim 7, characterized in that, The clamping block assembly (6) is fitted with two adjacent alloy steel forging rings. The gap clamping block (61) inside the clamping block assembly (6) is a single piece, which is located between the two adjacent alloy steel forging rings.

9. The deformation control device for heat treatment of alloy steel forged rings according to claim 1, characterized in that, The alloy steel forged ring heat treatment deformation control device is made of austenitic stainless heat-resistant steel.

10. A heat treatment method for an alloy steel forged ring heat treatment deformation control device, using the alloy steel forged ring heat treatment deformation control device according to any one of claims 1-9, characterized in that the steps include... include: Step S1: Use a crane to place the tooling assembly onto the alloy steel forging ring; Step S2: Place a pad (7) on the support ring (1) of the tooling assembly, punch holes in the pad (7), and tie it to the support ring (1) with steel wire; Place another alloy steel forged ring on top of the stack block (4) and install the tooling assembly in the same way; Step S3: Use clamping block assembly (6) to connect the two adjacent alloy steel forging rings mentioned above. The clamping block assembly (6) is evenly distributed. Repeat steps S2 and S3 to continue stacking the alloy steel forging rings; Step S4: Use a crane and lifting equipment to lift the bundled alloy steel forging ring along with the alloy steel forging ring heat treatment deformation control device onto the heat treatment trolley. Place pads (7) evenly on the bottom plate of the trolley to support the alloy steel forging ring and the supporting ring (1). After leveling, put it into the furnace for heating and heat preservation. Step S5: After the heat treatment is completed, use a crane and lifting equipment to transfer the alloy steel forging ring, along with the alloy steel forging ring heat treatment deformation control device, into the water tank; the cooling time estimation formula is: Where D represents the effective thickness of the alloy steel forged ring, s represents seconds, and mm represents millimeters; After the water tank cooling is completed, the alloy steel forging ring and the alloy steel forging ring heat treatment deformation control device are quickly transferred to the oil tank and cooled to room temperature; Step S6: Temper the quenched alloy steel forging ring along with the alloy steel forging ring heat treatment deformation control device as a whole. After tempering, remove the alloy steel forging ring heat treatment deformation control device.

Images