A deformation prevention auxiliary tool for heat treatment of large thin-walled cylinder forgings

Abstract

The utility model discloses a kind of anti-deformation auxiliary for large thin-walled cylinder forging heat treatment belongs to large thin-walled cylinder forging technical field, to solve the technical problem that existing large thin-walled cylinder forging is extremely easy to produce larger deformation in heat treatment process. The anti-deformation auxiliary includes annular support steel sheet, multiple even distribution support pad iron, reinforced support ring, multiple first vertical plate and multiple second vertical plate;Multiple even distribution support pad iron is evenly distributed along annular support steel sheet;Reinforced support ring is arranged on even distribution support pad iron;Multiple first vertical plate and multiple second vertical plate are evenly distributed on reinforced support ring, the height of first vertical plate and second vertical plate is same, the top surface of both directly contact with the bottom surface of large thin-walled cylinder forging;The top surface of second vertical plate is close to edge position and is equipped with edge stopper, and the inner wall of edge stopper is with large thin-walled cylinder forging. The utility model can avoid that large thin-walled cylinder forging produces larger deformation in heat treatment process.

Description

Technical Field

[0001] This utility model belongs to the technical field of large thin-walled cylindrical forgings, and particularly relates to an anti-deformation auxiliary tool for heat treatment of large thin-walled cylindrical forgings. Background Technology

[0002] Energy issues are gradually becoming a key factor restricting current and future social development. Currently, countries worldwide place great importance on the development of new energy sources, and vigorously developing new energy has become a consensus across all sectors of society. Nuclear power, as a safe, clean, and efficient energy source, demonstrates enormous potential. Actively developing nuclear power is not only one of the main ways to solve my country's future energy supply and demand contradictions, but also an effective means of controlling environmental pollution, playing a crucial role in sustainable energy development. In recent years, my country's nuclear power industry has entered a stage of rapid development, and its position in the energy structure is becoming increasingly prominent. Among them, the pebble bed modular high-temperature gas-cooled reactor, as an advanced fourth-generation nuclear power reactor technology, possesses multiple advantages such as high safety, high efficiency, excellent economy, and wide applicability.

[0003] The core support structure of the high-temperature gas-cooled reactor pressure vessel plays a crucial role in supporting the entire ceramic core structure. It mainly consists of components such as the core shell, upper support plate, lower support plate, positioning plate, and support base. Among these, the core shell assembly is the core part of the metal core support structure.

[0004] The reactor core assembly is welded from several cylindrical sections, some of which are forgings. These forgings have an outer diameter of Φ5500mm to Φ5700mm and a wall thickness of 175mm to 265mm. These large, thin-walled cylindrical forgings require performance heat treatment to achieve excellent mechanical properties to meet service requirements. Due to the large diameter and thin wall thickness of the cylindrical forgings, significant deformation is easily generated during heat treatment, which in turn creates difficulties for subsequent precision machining. Utility Model Content

[0005] Based on the above analysis, the present invention aims to provide an anti-deformation auxiliary tool for heat treatment of large thin-walled cylindrical forgings, in order to solve the problem that existing large-diameter thin-walled cylindrical forgings are prone to large deformation during heat treatment, especially during the quenching and cooling stage.

[0006] The objective of this utility model is mainly achieved through the following technical solutions:

[0007] This utility model provides an anti-deformation auxiliary tool for heat treatment of large thin-walled cylindrical forgings. The anti-deformation auxiliary tool includes an annular support steel plate, multiple evenly distributed support pads, a reinforced support ring, multiple first vertical plates, and multiple second vertical plates.

[0008] A ring-shaped support steel plate is placed on the furnace platform, and multiple evenly distributed support pads are evenly distributed along the ring-shaped support steel plate; the multiple evenly distributed support pads have the same structure and the same height; a reinforced support ring is placed on the evenly distributed support pads; multiple first vertical plates and multiple second vertical plates are evenly distributed on the reinforced support ring, the first vertical plates and the second vertical plates have the same height, and the top surfaces of both are in contact with the large thin-walled cylindrical forging; an edge stop is provided near the edge of the top surface of the second vertical plate, the inner wall of the edge stop conforms to the shape of the large thin-walled cylindrical forging, and the edge stop and the top surface of the second vertical plate form an L-shaped structure.

[0009] In one possible design, both the first and second upright plates are inverted T-shaped structures; correspondingly, multiple inverted T-shaped grooves are machined on the reinforced support ring along its radial direction, the number of inverted T-shaped grooves being equal to the sum of the number of the first and second upright plates; the first and second upright plates are embedded in the inverted T-shaped grooves of the reinforced support ring through their inverted T-shaped structures, and the first and second upright plates can slide along the radial direction of the reinforced support ring.

[0010] In one possible design, multiple blind holes are machined in the inverted T-groove. After determining the installation positions of the first and second vertical plates according to the outer diameter of the cylindrical forging, the blocking blocks are inserted into the corresponding blind holes to prevent the first and second vertical plates from sliding towards the outer circle of the reinforced support ring.

[0011] In one possible design, the number of first upright plates is 20-32, and the first upright plates are evenly arranged along the circumferential direction of the reinforced support ring; the gaps between the first upright plates allow for sufficient circulation of quenching cooling water.

[0012] In one possible design, the first upright plate is made of the same material as the reinforced support ring.

[0013] In one possible design, the height of the edge stop at the top of the second upright is 90-100mm.

[0014] In one possible design, there are four second uprights, which are evenly arranged along the circumference of the reinforced support ring, and the angle between the line connecting two adjacent second uprights and the center of the reinforced support ring is 90°.

[0015] In one possible design, the anti-deformation aid also includes a flexible cushioning contact layer;

[0016] The flexible buffer contact layer is provided on the top surface of the first and second vertical plates and on the inner wall of the edge blocks.

[0017] In one possible design, the reinforced support ring has a grid-shaped support steel pipe inside, and the ends of the grid-shaped support steel pipe are welded to the inner wall of the reinforced support ring.

[0018] In one possible design, the outer diameter of the large thin-walled cylindrical forging is Φ5500mm~Φ5700mm; the wall thickness is 175mm~265mm; and the weight is 10000kg~50000kg.

[0019] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0020] (1) This utility model utilizes annular support steel plates, evenly distributed support pads, reinforced support rings, first and second vertical plates, and edge blocks thereon to achieve the integrated function of "support-limiting-anti-deformation" for cylindrical forgings. Specifically, the annular support steel plates, evenly distributed support pads, reinforced support rings, first and second vertical plates can work together to support cylindrical forgings, and the second vertical plate and edge blocks thereon can limit the cylindrical forgings. The grid-shaped support steel pipes inside the reinforced support ring and the edge blocks form a dual anti-deformation structure of "internal reinforcement + external limiting".

[0021] (2) Both the first and second upright plates of this utility model are inverted T-shaped structures. Correspondingly, multiple inverted T-shaped grooves are machined on the reinforced support ring along its radial direction. The first and second upright plates are embedded in the inverted T-shaped grooves of the reinforced support ring through their inverted T-shaped structures and can slide along the radial direction of the reinforced support ring to be suitable for cylindrical forgings of different diameters.

[0022] (3) The present invention provides a flexible buffer contact layer on the top surface of the first and second upright plates and the inner wall of the edge block; the flexible buffer contact layer is made of special high temperature ceramic fiber composite material gasket or high purity graphite-based flexible gasket, which can maintain structural stability at high temperature, is not easy to react chemically with the forging, and has a certain compressive elasticity, which can absorb local stress.

[0023] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages will become apparent from the description or be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained from the description and accompanying drawings, which are particularly pointed out. Attached Figure Description

[0024] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0025] Figure 1 This is a schematic diagram of the structure of the reinforced support ring with an inverted T-groove according to the present invention;

[0026] Figure 2 for Figure 1 Cross-sectional view along the AA direction;

[0027] Figure 3 This is the front view of the first upright plate;

[0028] Figure 4 This is a side view of the first upright plate;

[0029] Figure 5 This is the front view of the first upright plate;

[0030] Figure 6 This is a side view of the first upright plate;

[0031] Figure 7 A structural diagram of the anti-deformation auxiliary tool;

[0032] Figure 8 for Figure 5 A cross-sectional view along the AA direction;

[0033] Figure 9 for Figure 5 A cross-sectional view along the BB direction;

[0034] Figure 10 This is a schematic diagram of the vertical cross-section of the reinforced support ring passing through its center;

[0035] Figure 11 A schematic diagram of the cylinder forging and anti-deformation auxiliary equipment being loaded into the furnace.

[0036] Figure label:

[0037] 1-Reinforced support ring; 2-First vertical plate; 3-Second vertical plate; 4-Edge stop block; 5-Cylinder forging; 6-Annular support steel plate; 7-Uniformly distributed support pad; 8-Furnace platform. Detailed Implementation

[0038] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0039] To reduce the deformation of the large thin-walled cylindrical forging 5 during the lifting and quenching process, a special auxiliary tool needs to be designed to support the forging and limit its deformation. According to the manufacturing requirements of nuclear power equipment forgings, this anti-deformation auxiliary tool is not welded to the large thin-walled cylindrical forging 5, but rather uses an independent structural design.

[0040] To solve the above-mentioned technical problems, this utility model provides an anti-deformation auxiliary tool for heat treatment of large thin-walled cylindrical forgings, such as... Figures 1 to 11As shown; the anti-deformation auxiliary tool includes annular support steel plate 6, multiple evenly distributed support pads 7, reinforced support ring 1, multiple first vertical plates 2 and multiple second vertical plates 3; wherein, the annular support steel plate 6 is set on the furnace platform 8, and the multiple evenly distributed support pads 7 are evenly distributed along the annular support steel plate 6; each evenly distributed support pad 7 has the same structure and the same height; the reinforced support ring 1 is set on the evenly distributed support pad 7; the multiple first vertical plates 2 and multiple second vertical plates 3 are evenly distributed on the reinforced support ring 1, the first vertical plates 2 and the second vertical plates 3 have the same height, and the top surfaces of both are in direct contact with the bottom surface of the large thin-walled cylindrical forging 5 (hereinafter referred to as the cylindrical forging 5); the top surface of the second vertical plate 3 is provided with an edge stop 4 near the edge, the inner wall of the edge stop 4 conforms to the shape of the large cylindrical forging 5, and the edge stop 4 and the top surface of the second vertical plate 3 form an L-shaped structure.

[0041] It should be pointed out that, as Figures 3 to 6 As shown, both the first vertical plate 2 and the second vertical plate 3 have an inverted T-shaped structure. Correspondingly, multiple inverted T-shaped grooves are machined on the reinforced support ring 1 along its radial direction. The number of inverted T-shaped grooves is equal to the sum of the number of the first vertical plate 2 and the second vertical plate 3. The first vertical plate 2 and the second vertical plate 3 are embedded in the inverted T-shaped groove of the reinforced support ring 1 through their inverted T-shaped structure. The first vertical plate 2 and the second vertical plate 3 can slide along the radial direction of the reinforced support ring 1 to be suitable for cylindrical forgings 5 ​​with different diameter specifications.

[0042] To prevent the first upright plate 2 and the second upright plate 3 from sliding towards the outer circle of the support ring, this utility model has multiple blind holes machined on the inverted T-shaped groove on the reinforced support ring 1. After the installation positions of the first upright plate 2 and the second upright plate 3 are adjusted according to the cylindrical forging 5, the blocking block is inserted into the corresponding blind hole to prevent the first upright plate 2 and the second upright plate 3 from sliding towards the outer circle of the support ring.

[0043] It should be noted that the number of first upright plates 2 in this utility model is 20-32, and the first upright plates 2 are evenly arranged along the circumferential direction of the reinforced support ring 1; sufficient gaps are maintained between the first upright plates 2 to allow the quenching cooling water to circulate fully; the first upright plates 2 provide stable support to the large thin-walled cylindrical forging 5 by being set at its bottom.

[0044] It should be noted that the gap between adjacent first vertical plates 2 is used to allow sufficient circulation of quenching cooling water, ensuring the cooling rate of the cylindrical forging 5. During furnace quenching, the anti-deformation auxiliary tool is lifted together with the cylindrical forging 5 by a single-arm hook and enters the quenching medium as a whole. Thus, throughout the entire heat treatment and quenching cooling process, the anti-deformation auxiliary tool continuously provides stable and uniform support and restraint to the cylindrical forging 5, significantly reducing its deformation.

[0045] It should be noted that the material of the first upright plate 2 is the same as that of the reinforced support ring 1.

[0046] The height of the edge stop 4 at the top of the second upright plate 3 is 90-100mm; the material of the second upright plate 3 is 0Cr18Ni9 austenitic stainless steel, which is cut and formed by steel plate. There are 4 second upright plates 3, which are evenly arranged along the circumference of the reinforced support ring 1, that is, the angle between the line connecting two adjacent second upright plates 3 and the center of the reinforced support ring 1 is 90°. The first upright plate 2 is evenly distributed between adjacent second upright plates 3.

[0047] The large thin-walled cylindrical forging 5 mentioned above needs to be sampled and tested after heat treatment. This utility model provides a first vertical plate 2 and a second vertical plate 3 on the reinforced support ring 1, which facilitates sampling and performance testing at the bottom of the cylindrical forging 5.

[0048] Compared with the prior art, large-diameter thin-walled cylindrical forgings 5 ​​are prone to deformation during quenching due to the influence of thermal stress and structural stress. This utility model can reduce the deformation of cylindrical forgings 5 ​​during quenching by using anti-deformation auxiliary tools.

[0049] Because there are strict time limits between quenching large thin-walled cylindrical forgings and immersion in water, placing the forgings on auxiliary fixtures after removal from the furnace and then quenching them together with the fixtures will take a long time and affect the mechanical properties of the forgings. Therefore, anti-deformation auxiliary fixtures should be placed in the heat treatment furnace before loading the forgings for heat treatment. Figure 11 As shown, the anti-deformation auxiliary fixture is heated in the furnace and supports the large thin-walled cylindrical forging 5 throughout the heating process. It is also quenched after being removed from the furnace. Specifically, when the large thin-walled cylindrical forging 5 is loaded into the furnace, a ring-shaped support steel plate is first placed on the furnace platform 8, and then multiple evenly distributed support pads 7 are placed on the ring-shaped support steel plate. A leveling instrument is used to check whether the height of each evenly distributed support pad 7 is consistent. After confirming that the height of the evenly distributed support pads 7 is consistent, the aforementioned reinforced support ring 1 is placed on the evenly distributed support pads 7. The first vertical plate 2 and the second vertical plate 3 on the reinforced support ring 1 can support the large thin-walled cylindrical forging 5. In addition, the edge stop 4 at the top of the second support plate, besides supporting the large thin-walled cylindrical forging 5, can also prevent the outer diameter of the cylinder from expanding outwards during quenching.

[0050] Compared with the prior art, this utility model utilizes annular support steel plate 6, evenly distributed support pads, reinforced support ring 1, first vertical plate 2 and second vertical plate 3 and edge blocks 4 thereon to synergistically achieve the integrated function of "support-limiting-anti-deformation" of the cylindrical forging 5.

[0051] The outer diameter of the aforementioned large thin-walled cylindrical forging 5 is Φ5500mm~Φ5700mm; the wall thickness is 175mm~265mm; and the weight is 10000kg~50000kg.

[0052] The thickness of the aforementioned reinforced support ring 1 is 300mm to 350mm; the height is 400mm to 600mm. This size design is intended to ensure that the reinforced support ring 1 has sufficient rigidity and high-temperature strength.

[0053] The aforementioned reinforced support ring 1 is made of 12Cr2Mo1V or 30Cr2Ni4MoV, and the room temperature yield strength Rp of the reinforced support ring 1 is... 0.2 ≥310MPa, room temperature tensile strength Rm≥510MPa.

[0054] The reinforced support ring 1 of this invention has a grid-shaped support steel pipe inside, the ends of which are welded to the inner wall of the reinforced support ring 1. The grid-shaped support steel pipe is used to reduce the deformation of the reinforced support ring 1, thereby reducing the deformation of the cylindrical forging 5.

[0055] Compared with existing technologies, this utility model utilizes a grid-shaped support steel pipe to significantly enhance the rigidity of the reinforced support ring 1, indirectly reducing the radial deformation of the cylindrical forging 5. The grid-shaped support steel pipe and the edge stop 4 form a dual anti-deformation structure of "internal reinforcement + external restraint".

[0056] The aforementioned grid-shaped support steel pipes are made of seamless steel pipes with an outer diameter of 80mm to 100mm and a wall thickness of 12mm to 15mm. The grid-shaped structure is formed by cross-welding two longitudinal main support pipes and two transverse main support pipes.

[0057] The above-mentioned grid-shaped support steel pipe is made of the same material as the reinforced support ring, namely 12Cr2Mo1V or 30Cr2Ni4MoV, to ensure that the thermal expansion coefficients of the two match at high temperatures and to avoid additional stress caused by material differences.

[0058] In order to avoid local damage to the contact area between the anti-deformation auxiliary and the large thin-walled cylindrical forging 5, the anti-deformation auxiliary of this utility model also includes a flexible buffer contact layer. The flexible buffer contact layer is provided on the contact surface between the forging and the anti-deformation auxiliary, that is, on the top surface of the first vertical plate 2 and the second vertical plate 3 and the inner wall of the edge block 4.

[0059] The aforementioned flexible buffer contact layer is made of special high-temperature ceramic fiber composite gaskets (such as alumina or zirconia-based composites) or high-purity graphite-based flexible gaskets. These materials can maintain structural stability at high temperatures, are not prone to chemical reactions with forgings, and have a certain degree of compressive elasticity, enabling them to absorb localized stress.

[0060] Compared with the prior art, on the one hand, this utility model can construct a "soft connection" interface between the anti-deformation auxiliary and the cylindrical forging 5 through the flexible buffer contact layer. (1) The flexible buffer contact layer effectively absorbs the local size mismatch caused by the difference in thermal expansion coefficients between the anti-deformation auxiliary and the cylindrical forging 5 during heating and cooling, and evenly disperses the stress to avoid local stress concentration. (2) The flexibility of the flexible buffer contact layer allows the contact pressure to be distributed more evenly on the surface of the forging, reducing the pressure per unit area, thereby reducing the risk of indentation or plastic deformation. (3) The low friction characteristics of the flexible buffer contact layer reduce the wear and scratches on the surface of the forging caused by the relative sliding that may occur between the anti-deformation auxiliary and the cylindrical forging 5 under temperature changes or quenching dynamic impact. (4) As a physical barrier, the flexible buffer contact layer avoids direct contact between different metal materials, thereby reducing the risk of diffusion, adhesion or local corrosion that may occur at high temperatures, and protecting the surface integrity and local microstructure properties of the cylindrical forging 5.

[0061] The aforementioned flexible buffer contact layer is a gradient buffer composite structure, which includes an inner contact layer and an outer contact layer. The inner contact layer uses a 5mm thick high-elasticity high-temperature ceramic fiber pad, while the outer contact layer (near the 5th side of the cylindrical forging) uses a 3-5mm thick high-purity graphite-based flexible pad (friction coefficient ≤0.12). The inner and outer contact layers are sewn together with high-temperature resistant fiber thread, and the total thickness of both is 5mm-10mm.

[0062] Compared with existing technologies, the inner contact layer of this invention utilizes the high elasticity of the ceramic fiber pad to absorb the stress generated by the difference in thermal expansion, while the outer contact layer utilizes the low friction characteristics of the graphite pad to reduce relative sliding wear, forming a dual function of stress absorption and low friction protection, thereby reducing the surface damage rate of the forging. In addition, the self-lubricating properties of the high-purity graphite-based flexible pad can reduce the relative displacement between the cylindrical forging 5 and the anti-deformation auxiliary tool during quenching, improving the roundness accuracy of the cylindrical forging 5 and reducing the amount of deformation.

[0063] The thickness of the aforementioned flexible buffer contact layer is 5mm-10mm to provide sufficient buffer space. The shape of the flexible buffer contact layer is designed to conform to the surface of the cylindrical forging 5, ensuring uniform contact and avoiding the formation of new stress concentration points.

[0064] It should be noted that before loading the furnace for heat treatment, the flexible buffer contact layer is first installed or placed on the top surface of the first vertical plate 2 and the second vertical plate 3, as well as the inner wall surface of the edge block 4. Then, the large thin-walled cylindrical forging 5 is placed on the anti-deformation auxiliary tool that has been installed with the flexible buffer contact layer, ensuring that the forging and the anti-deformation auxiliary tool are always in contact through the buffer layer.

[0065] Throughout the heating process, the anti-deformation fixture, the flexible buffer contact layer, and the cylindrical forging 5 are heated together in the furnace. At this time, the flexible buffer contact layer effectively absorbs the localized stress generated between the anti-deformation fixture and the cylindrical forging 5 due to the difference in their coefficients of thermal expansion, distributing the contact pressure evenly over a larger area and preventing stress concentration. The flexible buffer contact layer also possesses low-friction properties, which helps reduce wear on the forging surface when there is slight relative displacement between the forging and the fixture.

[0066] During the quenching and cooling process, the anti-deformation auxiliary tool and the cylindrical forging 5 are lifted together and immersed as a whole in the quenching medium. In the rapid cooling stage, the flexibility of the flexible buffer contact layer further mitigates the impact of the quenching medium and changes in thermal stress on the contact area, reducing local friction and shear force. Simultaneously, the flexible buffer contact layer effectively isolates the anti-deformation auxiliary tool from direct metal-to-metal contact with the cylindrical forging 5, minimizing microscopic damage, indentations, or localized deterioration of the forging surface.

[0067] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A deformation-resistant auxiliary tool for heat treatment of large thin-walled cylindrical forgings, characterized in that, It includes a ring-shaped support steel plate, multiple evenly distributed support pads, reinforced support rings, multiple first upright plates, and multiple second upright plates; The annular support steel plate is placed on the furnace platform, and multiple evenly distributed support pads are evenly distributed along the annular support steel plate; the multiple evenly distributed support pads have the same structure and the same height; a reinforced support ring is placed on the evenly distributed support pads; multiple first vertical plates and multiple second vertical plates are evenly distributed on the reinforced support ring, the first vertical plates and the second vertical plates have the same height, and the top surfaces of both are in contact with the large thin-walled cylindrical forging; an edge stop is provided near the edge of the top surface of the second vertical plate, the inner wall of the edge stop conforms to the shape of the large thin-walled cylindrical forging, and the edge stop and the top surface of the second vertical plate form an L-shaped structure.

2. The anti-deformation auxiliary tool for heat treatment of large thin-walled cylindrical forgings according to claim 1, characterized in that, Both the first and second upright plates have an inverted T-shaped structure. Correspondingly, multiple inverted T-shaped grooves are machined on the reinforced support ring along its radial direction. The number of inverted T-shaped grooves is equal to the sum of the number of the first and second upright plates. The first and second upright plates are embedded in the inverted T-shaped grooves of the reinforced support ring through their inverted T-shaped structures. The first and second upright plates can slide along the radial direction of the reinforced support ring.

3. The anti-deformation auxiliary tool for heat treatment of large thin-walled cylindrical forgings according to claim 2, characterized in that, Multiple blind holes are machined in the inverted T-groove. After determining the installation positions of the first and second vertical plates according to the outer diameter of the cylindrical forging, the blocking blocks are inserted into the corresponding blind holes to prevent the first and second vertical plates from sliding towards the outer circle of the reinforced support ring.

4. The anti-deformation auxiliary tool for heat treatment of large thin-walled cylindrical forgings according to claim 3, characterized in that, The number of the first upright plates is 20-32, and the first upright plates are evenly arranged along the circumferential direction of the reinforced support ring; the gaps between the first upright plates allow for sufficient circulation of quenching cooling water.

5. The anti-deformation auxiliary tool for heat treatment of large thin-walled cylindrical forgings according to claim 1, characterized in that, The first upright plate is made of the same material as the reinforced support ring.

6. The anti-deformation auxiliary tool for heat treatment of large thin-walled cylindrical forgings according to claim 1, characterized in that, The height of the edge stop at the top of the second upright is 90-100mm.

7. The anti-deformation auxiliary tool for heat treatment of large thin-walled cylindrical forgings according to claim 6, characterized in that, There are four second upright plates, which are evenly arranged along the circumference of the reinforced support ring. The angle between the line connecting two adjacent second upright plates and the center of the reinforced support ring is 90°.

8. The anti-deformation auxiliary tool for heat treatment of large thin-walled cylindrical forgings according to claim 1, characterized in that, The anti-deformation aid also includes a flexible buffer contact layer; The flexible buffer contact layer is disposed on the top surface of the first and second upright plates and on the inner wall of the edge block.

9. The anti-deformation auxiliary tool for heat treatment of large thin-walled cylindrical forgings according to claim 1, characterized in that, The reinforced support ring has a grid-shaped support steel pipe inside, and the ends of the grid-shaped support steel pipe are welded to the inner wall of the reinforced support ring.

10. The anti-deformation auxiliary tool for heat treatment of large thin-walled cylindrical forgings according to any one of claims 1 to 9, characterized in that, The outer diameter of the large thin-walled cylindrical forging is Φ5500mm~Φ5700mm; the wall thickness is 175mm~265mm; and the weight is 10000kg~50000kg.

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