CN109306402B - Heat treatment method for thorium-based molten salt main container and reactor core shroud - Google Patents
Heat treatment method for thorium-based molten salt main container and reactor core shroud Download PDFInfo
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- CN109306402B CN109306402B CN201811425414.3A CN201811425414A CN109306402B CN 109306402 B CN109306402 B CN 109306402B CN 201811425414 A CN201811425414 A CN 201811425414A CN 109306402 B CN109306402 B CN 109306402B
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Abstract
The invention discloses a heat treatment method of a thorium-based molten salt main container and a reactor core shroud, which comprises the following steps: s1: heat treatment of a main container, wherein the main container adopts a vertical structure for heat treatment, a bottom plate adopts a thick plate of carbon steel or low alloy steel and is horizontally placed on a furnace body bearing point in a furnace to provide a main container placing plane; s2: and (3) carrying out heat treatment on the reactor core surrounding barrel, wherein the reactor core surrounding barrel adopts a vertical structure for heat treatment, and the bottom plate and the partition plate are horizontally placed on a furnace body bearing point in the furnace, so that a placing plane and an isolation effect of the reactor core surrounding barrel are provided. By adopting the heat treatment method of the main thorium-based molten salt container and the reactor core shroud, the precision requirement of size change in the heat treatment process of equipment can be effectively guaranteed, the heat treatment cost is reduced, the obtained heat-treated equipment with excellent performance, stable quality and higher precision is obtained, the manufacturing requirements of the main thorium-based molten salt container and the reactor core shroud are met, and the service life of the equipment is prolonged.
Description
Technical Field
The invention relates to the field of application of molten salt projects in nuclear power industry, in particular to a heat treatment method of a thorium-based molten salt main container and a reactor core shroud.
Background
The nickel-based alloy with excellent high-temperature mechanical property and corrosion resistance is widely applied to the fields of petrochemical industry, aerospace, ocean engineering, nuclear power stations and other industries. The UNS N10003 material belongs to one of Ha's N series alloys and is a main material adopted for manufacturing a core equipment main container and a reactor core surrounding barrel in a thorium-based molten salt (TMSR) nuclear energy system, and the UNS N10003 belongs to Ni-Mo series high-temperature nickel-based alloy, has a nominal component of 70Ni-16Mo-7Cr-5Fe, and has good corrosion resistance, high-temperature mechanical property and radiation resistance to fluoride salts in a high-temperature environment of 650-725 ℃.
Due to the fact that requirements for dimensional accuracy of the thorium-based molten salt main container and reactor core surrounding barrel equipment such as straightness, ovality and flatness of in-reactor supporting pieces are high, post-welding heat treatment needs to be carried out on the equipment in order to reduce constraint stress in the manufacturing process of the equipment, guarantee dimensional stability in the later use process of the equipment and improve comprehensive use performance of the equipment. During heat treatment, in order to prevent the occurrence of dimensional out-of-tolerance deformation in the process, the equipment needs to be subjected to tool constraint. If an iron-based material is adopted for high-temperature deformation prevention restraint, on one hand, the high-temperature strength of the material is low, the material cannot play a tool role, and on the other hand, iron ion pollution of equipment can be caused; if other nickel-based materials are adopted for high-temperature deformation prevention restraint, the heat treatment cost is increased due to higher material price; if the N10003 material which is the same as the equipment is adopted to carry out high-temperature deformation prevention restriction, the best effect of the heat treatment can be achieved, but the N10003 material has higher price and long supply period, so that the manufacturing cost is increased greatly and unnecessary waste is generated.
Disclosure of Invention
The invention aims to provide a thorium-based molten salt main container and a heat treatment method of a reactor core surrounding barrel, wherein the thorium-based molten salt main container mainly comprises a lower end enclosure, a lower barrel, an upper barrel and an upper flange, the reactor core surrounding barrel mainly comprises an upper reinforcing ring, an upper surrounding barrel, a lower surrounding barrel and a surrounding barrel bottom plate assembly, a main container heat treatment device mainly comprises a bottom plate, a partition plate, a first supporting block, a first tool ring, a second supporting block, an internal component tie bar, a third tool ring, a third supporting block, a fourth tool ring, a fourth supporting block and a circulation cavity, the reactor core surrounding barrel heat treatment device mainly comprises a bottom plate, a partition plate, a fifth supporting block, a fifth tool ring, a steel pipe, an angle code, a pressing ring, a separating ring and a separating plate, and is characterized in that: the heat treatment method of the thorium-based molten salt main container and the reactor core shroud comprises the following steps:
s1: heat treatment of a main container, wherein the main container adopts a vertical structure for heat treatment, a bottom plate adopts a thick plate of carbon steel or low alloy steel and is horizontally placed on a furnace body bearing point in a furnace to provide a main container placing plane; the partition plate is made of an austenitic stainless steel thin plate, the bottom plate and the main container upper flange are separated, iron ions of the bottom plate are prevented from polluting the main container upper flange, the first supporting blocks are made of N10003 materials, the number of the first supporting blocks is 3, the first supporting blocks are circumferentially and uniformly welded on the lower cylinder body in a spot welding mode and are used as supporting points of the first tool ring, the first tool ring is prevented from falling off and being separated from a set position in the heat treatment process, and the first tool ring is made of austenitic stainless steel; the second tool ring is made of austenitic stainless steel, the second tool ring is tightly attached to an inner component in the lower cylinder body in a position to prevent the heat treatment deformation of the inner component, meanwhile, 3 pieces of second supporting blocks made of N10003 materials are uniformly welded to the lower cylinder body in a circumferential direction and tightly attached to the second tool ring to prevent the second tool ring from falling off and separating from a set position in the heat treatment process, the pull ribs of the inner component are made of the N10003 materials, the pull ribs of the inner component are firmly welded with the side wall of the lower cylinder body and the surface of the inner component respectively, the pull ribs of the inner component and the second tool ring act together to prevent the angular deformation of the inner component in the heat treatment process from influencing the planeness of the inner component, the austenitic third tool ring and the N10003 third supporting block are arranged on the upper side of the orifice of the forged pipe A1 in the same manner in a spot welding manner, the third tool ring and the first tool ring are symmetrically arranged on the upper side and the lower side with the forged pipe A1 as the reference, and the austenitic fourth supporting block made of, meanwhile, the position of the forged pipe A3 is prevented from deforming in the heat treatment process, through holes are formed in the bottom plate and the partition plate, and at the moment, the through holes, the forged pipe A1, the forged pipe A2 and the forged pipe A3 form a hot air circulation cavity which is used for ensuring that the circulation of hot air is smoother in the heat treatment process, the internal and external temperature gradients of the main container are reduced, and the temperature uniformity of the heat treatment is better;
s2: performing heat treatment on the reactor core surrounding barrel, wherein the reactor core surrounding barrel adopts a vertical structure for heat treatment, and the bottom plate and the partition plate are horizontally placed on a furnace body bearing point in the furnace to provide a placing plane and an isolation effect of the reactor core surrounding barrel; two groups of austenitic stainless steel fifth tool rings are arranged at openings at two ends of the upper enclosure, 3 fifth supporting blocks made of N10003 materials are respectively arranged below the two groups of austenitic stainless steel fifth tool rings, and the fifth supporting blocks are uniformly distributed in the circumferential direction and are welded to the inner wall of the upper enclosure in a spot mode, so that the fifth tool rings are prevented from falling in the heat treatment process; two groups of austenitic steel pipes are perpendicularly welded on the fifth tooling ring in a crossed mode, and the function of rigidly restraining the fifth tooling ring is achieved; two groups of austenitic stainless steel fifth tool rings are arranged at openings at two ends of the lower enclosing cylinder, 3 fifth supporting blocks made of N10003 materials are respectively arranged below the two groups of austenitic stainless steel fifth tool rings, and the fifth supporting blocks are uniformly distributed in the circumferential direction and are welded to the inner wall of the upper enclosing cylinder in a spot mode, so that the fifth tool rings are prevented from falling in the heat treatment process; two groups of austenitic steel pipes are perpendicularly welded on the fifth tooling ring in a crossed mode, and the function of rigidly restraining the fifth tooling ring is achieved; the bottom plate assembly is horizontally placed on an austenitic stainless steel isolation plate, iron ions of a carbon steel bottom plate are prevented from polluting the bottom plate assembly, an austenitic stainless steel isolation ring is horizontally placed on the surface of the bottom plate assembly, a thick-plate carbon steel or low alloy steel pressing ring is pressed above the isolation ring, a carbon steel or low alloy steel corner brace is buckled on the pressing ring, two ends of the corner brace are firmly welded with the pressing ring and the bottom plate respectively, the bottom plate assembly is flatly attached to the stainless steel isolation plate, the deformation of a lower flat plate of the bottom plate assembly in the heat treatment process is prevented, an austenitic stainless steel fifth tool ring and a fifth supporting block made of N10003 materials are arranged at the upper opening of the bottom plate assembly, the contraction deformation of a port is prevented, and after the equipment placement and the tool arrangement are completed, the bottom plate assembly can be placed into a.
Preferably, in S1, a gap of 1mm is left between the first tooling ring, the second tooling ring, the third tooling ring, the fourth tooling ring and the inner wall of the main container cylinder in the circumferential direction, and the gap is used as a deformation rate buffer margin.
Preferably, in S1, the first support block, the second support block, the internal member tie bar, the third support block, and the fourth support block all need to be directly welded to the main tank, so that the material of N10003 is adopted to prevent dilution of the material of the main tank; all other material parts are not welded with the main container.
Preferably, the carbon steel or low alloy steel part in the S1 is not directly contacted with the main container, and is isolated by adopting an austenitic stainless steel material part.
Preferably, in S2, a gap of 1mm is left between the fifth tooling ring and the inner wall of the core shroud in the circumferential direction, and the gap is used as a deformation rate buffering margin.
Preferably, the fifth support block in S2 needs to be directly welded to the core shroud, so that the core shroud is prevented from being diluted by using N10003 material, and other material components are not welded to the core shroud.
Preferably, neither the S2 medium carbon steel nor low alloy steel component directly contacts with the core shroud, and the components are isolated by austenitic stainless steel components.
Preferably, the heat treatment process parameters of 400 ℃ and the rising and cooling rate of less than or equal to 55 ℃/h, the heat preservation temperature of 760-790 ℃, and the heat preservation time of 360-380 min are adopted for carrying out the size stabilization heat treatment.
Compared with the prior art, the invention has the beneficial effects that: by adopting the heat treatment method of the main thorium-based molten salt container and the reactor core shroud, the precision requirement of size change in the heat treatment process of equipment can be effectively guaranteed, the heat treatment cost is reduced, the obtained heat-treated equipment with excellent performance, stable quality and higher precision is obtained, the manufacturing requirements of the main thorium-based molten salt container and the reactor core shroud are met, and the service life of the equipment is prolonged.
Drawings
FIG. 1 is a graph of parameters of heat treatment of a main vessel and a reactor core shroud of thorium-based molten salt;
FIG. 2 is a general view of a thorium-based molten salt main vessel and a reactor core shroud;
FIG. 3 is a diagram of a heat treatment mode of a main vessel of thorium-based molten salt;
FIG. 4 is a diagram of a thorium-based molten salt reactor core shroud treatment mode;
FIG. 5 is a view of the structure of an austenitic stainless steel tooling ring.
In the figure: the device comprises a lower end socket 1, a lower barrel 2, an upper barrel 3, an upper flange 4, a reinforcing ring 5, an upper enclosing barrel 6, a lower enclosing barrel 7, an enclosing barrel bottom plate component 8, a bottom plate 9, a partition plate 10, a first supporting block 11, a first tooling ring 12, a second tooling ring 13, a second supporting block 14, an internal component tie bar 15, a third tooling ring 16, a third supporting block 17, a fourth tooling ring 18, a fourth supporting block 19, a circulation cavity 20, a fifth supporting block 21, a fifth tooling ring 22, a steel pipe 23, a corner brace 24, a pressing ring 25, a separating ring 26 and a separating plate 27.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The method of the invention is explained in detail by combining the thorium-based molten salt main container and the reactor core shroud example with the attached drawings:
the thorium-based molten salt main container in the attached drawing mainly comprises a lower end enclosure 1, a lower cylinder 2, an upper cylinder 3 and an upper flange 4; the reactor core shroud mainly comprises an upper reinforcing ring 5, an upper shroud 6, a lower shroud 7 and a shroud bottom plate assembly 8.
The invention discloses a heat treatment process method and a technical means for preventing equipment from generating size out-of-tolerance deformation in the heat treatment process, saving UNS N10003 tooling materials and reducing the temperature gradient between the inside and the outside of a container in the heat treatment process, and particularly discloses the following heat treatment process method and the technical means:
the main container heat treatment device mainly comprises a bottom plate 9, a partition plate 10, a first supporting block 11, a first tooling ring 12, a second tooling ring 13, a second supporting block 14, an internal component lacing wire 15, a third tooling ring 16, a third supporting block 17, a fourth tooling ring 18, a fourth supporting block 19 and a circulation cavity 20. The main container adopts a vertical structure for heat treatment;
the bottom plate 9 is made of a thick plate of carbon steel or low alloy steel and is horizontally placed on a furnace body bearing point in the furnace to provide a main container placing plane; the partition plate 10 is made of an austenitic stainless steel thin plate, and separates the bottom plate 9 from the main container upper flange 4, so that iron ions of the bottom plate 9 are prevented from polluting the main container upper flange 4; the first supporting blocks 11 are made of N10003 materials, are 3 in number, are uniformly and circumferentially welded on the lower cylinder body 2 in a spot welding mode and are used as supporting points of the first tool ring 12, and the supporting ring 12 is prevented from falling off and being separated from a set position in the heat treatment process; the first tooling ring 12 is made of austenitic stainless steel, the specific structural form is shown in the drawing, the first tooling ring 12 is horizontally arranged at the position of a forged pipe A2, and the deformation of the position of the forged pipe A2 in the heat treatment process is prevented; the second tool ring 13 is made of austenitic stainless steel and is closely attached to an internal component inside the lower cylinder 2 to prevent the internal component from being deformed by heat treatment, meanwhile, 3 pieces of second supporting blocks 14 made of N10003 materials are uniformly and circumferentially welded on the lower cylinder 2 and closely attached to the second tool ring 13 to prevent the second tool ring 13 from falling and separating from a set position in the heat treatment process; the internal component tie bar 15 is made of N10003 materials, two ends of the tie bar respectively act with the side wall of the lower cylinder body 2 and the surface of the internal component, and the internal component tie bar 15 and the second tooling ring 13 jointly to prevent the angular deformation of the internal component in the heat treatment process from influencing the flatness of the internal component; an austenite third tool ring 16 and a N10003 third supporting block 17 are arranged on the upper side of the pipe orifice of the forged pipe A1 in a spot welding mode in the same mode, and the third tool ring 16 and the first tool ring 12 are symmetrically arranged on the upper side and the lower side of the forged pipe A1; the austenite fourth tooling ring 18 and the N10003 fourth supporting block 19 are installed and fixed at the forged pipe A3 in a spot welding mode in the same mode, and meanwhile, the deformation of the forged pipe A3 in the heat treatment process is prevented;
through holes are formed in the bottom plate 9 and the partition plate 10, and at the moment, the through holes, the forged pipe A1, the forged pipe A2 and the forged pipe A3 form a hot air circulation cavity 20 which is used for smooth circulation of hot air in the heat treatment process, so that the temperature gradient inside and outside the main container is reduced, and the temperature uniformity of the heat treatment is better;
a 1mm gap is reserved between the first tool ring 12, the second tool ring 13, the third tool ring 16 and the fourth tool ring 18 and the inner wall of the main container cylinder in the circumferential direction and is used as a deformation rate buffer allowance;
the first supporting block 11, the second supporting block 14, the internal component tie bar 15, the third supporting block 17 and the fourth supporting block 19 are directly welded with the main container, so that the material of the main container is prevented from being diluted by adopting N10003; the other material parts are not welded with the main container;
the carbon steel or low alloy steel components are not directly contacted with the main container, and are isolated by austenitic stainless steel components.
The reactor core shroud heat treatment device mainly comprises a bottom plate 9, a partition plate 10, a fifth supporting block 21, a fifth tooling ring 22, a steel pipe 23, an angle brace 24, a pressing ring 25, a spacer ring 26 and a spacer plate 27. The reactor core surrounding barrel adopts a vertical structure for heat treatment;
the bottom plate 9 and the partition plate 10 are horizontally placed on a furnace body bearing point in the furnace to provide a placing plane and an isolation effect for the reactor core surrounding barrel; two groups of austenitic stainless steel fifth tool rings 22 are arranged at openings at two ends of the upper enclosing cylinder 6, 3 pieces of fifth supporting blocks 21 made of N10003 materials are respectively arranged below the two groups of austenitic stainless steel fifth tool rings 22, and the fifth supporting blocks 21 are uniformly and circumferentially welded to the inner wall of the upper enclosing cylinder in a spot mode to prevent the fifth tool rings 22 from falling in the heat treatment process; two groups of austenite steel pipes 23 are perpendicularly welded on the fifth tool ring 22 in a crossed mode, and the function of rigidly restraining the fifth tool ring 22 is achieved;
two groups of austenitic stainless steel fifth tool rings 22 are arranged at openings at two ends of the lower enclosing cylinder 7, 3 fifth supporting blocks 21 made of N10003 materials are respectively arranged below the two groups of austenitic stainless steel fifth tool rings 22, and the fifth supporting blocks 21 are uniformly and circumferentially welded to the inner wall of the lower enclosing cylinder in a spot mode to prevent the fifth tool rings 22 from falling in the heat treatment process; two groups of austenite steel pipes 23 are perpendicularly welded on the fifth tool ring 22 in a crossed mode, and the function of rigidly restraining the fifth tool ring 22 is achieved;
the bottom plate component 8 is horizontally placed on an austenitic stainless steel isolation plate 27 to prevent iron ions of a carbon steel bottom plate 9 from polluting the bottom plate component 8, an austenitic stainless steel isolation ring 26 is horizontally placed on the surface of the bottom plate component 8, a thick plate carbon steel or low alloy steel pressing ring 25 is pressed above the isolation ring 26, a carbon steel or low alloy steel corner brace 24 is buckled on the pressing ring 25, two ends of the corner brace 24 are firmly welded on the pressing ring 25 and the bottom plate 9 respectively, so that the bottom plate component 8 is flatly attached to the stainless steel isolation plate 27, and the deformation of a lower flat plate of the bottom plate component 8 in the heat treatment process is prevented. The austenitic stainless steel fifth tooling ring 22 and the fifth supporting block 21 made of N10003 material are arranged at the upper opening of the bottom plate component 8, so that the port is prevented from shrinking and deforming.
A gap of 1mm is reserved between the fifth tooling ring 22 and the inner wall of the reactor core surrounding barrel in the circumferential direction and is used as a deformation rate buffer allowance;
the fifth supporting block 21 needs to be directly welded with the reactor core shroud, so that the material of the reactor core shroud is prevented from being diluted by adopting N10003; the other material components are not welded with the reactor core surrounding barrel;
the carbon steel or low alloy steel components are not directly contacted with the reactor core surrounding barrel, and are isolated by adopting austenitic stainless steel components.
After the equipment placement and the tool arrangement are finished, the furnace can be put into the furnace for heating treatment.
And electrifying the electric heating furnace for heating, and performing heat treatment on the equipment in a slow heating mode. And (3) feeding the equipment into a furnace at room temperature for heating, controlling the heating speed when the temperature is raised to 400 ℃, heating at the heating speed range of less than or equal to 55 ℃/h until the temperature reaches 760-790 ℃, entering a heat preservation stage, and preserving the heat for 360-380 min. In this intensification heating process, because the programming rate is slower, the heat can be gentler by the inside conduction of outside to equipment, because the body forging pipe mouth footpath of equipment is less, the back-off formula is placed the hot air circulation of heat treatment not smooth, so above has designed hot air circulation chamber, causes hot air in equipment, outer circulation more smooth and easy, combines to adopt the mode of slow heating, helps reducing heat treatment in-process equipment inside and outside difference in temperature gradient more like this, makes heat treatment reach better effect. After the heat preservation is finished, the temperature is also reduced at the cooling speed of less than or equal to 55 ℃/h until the temperature is reduced to 400 ℃, and the heat treatment process curve is shown as the attached figure 1.
By adopting the heat treatment method of the main thorium-based molten salt container and the reactor core shroud, the precision requirement of size change in the heat treatment process of equipment can be effectively guaranteed, the heat treatment cost is reduced, the obtained heat-treated equipment with excellent performance, stable quality and higher precision is obtained, the manufacturing requirements of the main thorium-based molten salt container and the reactor core shroud are met, and the service life of the equipment is prolonged.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. The utility model provides a thorium base fused salt main container and heat treatment method of reactor core surrounding barrel, thorium base fused salt main container is by the low head, the barrel down, go up barrel and upper flange and constitute, the reactor core surrounding barrel is by the upper portion beaded finish, go up the surrounding barrel, lower surrounding barrel and surrounding barrel bottom plate subassembly are constituteed, main container heat treatment device mainly includes the bottom plate, a partition plate, first supporting shoe, first frock circle, second frock circle, the second supporting shoe, the internals lacing wire, third frock circle, the third supporting shoe, fourth frock circle, the fourth supporting shoe, the circulation chamber, reactor core surrounding barrel heat treatment device mainly includes the bottom plate, a partition plate, the fifth supporting shoe, fifth frock circle, the steel pipe, the angle sign indicating number, the clamping ring, the isolating plate, its characterized in that: the heat treatment method of the thorium-based molten salt main container and the reactor core shroud comprises the following steps:
s1: heat treatment of a main container, wherein the main container adopts a vertical structure for heat treatment, a bottom plate adopts a thick plate of carbon steel or low alloy steel and is horizontally placed on a furnace body bearing point in a furnace to provide a main container placing plane; the partition plate is made of an austenitic stainless steel thin plate, the bottom plate and the main container upper flange are separated, iron ions of the bottom plate are prevented from polluting the main container upper flange, the first supporting blocks are made of N10003 materials, the number of the first supporting blocks is 3, the first supporting blocks are circumferentially and uniformly welded on the lower cylinder body in a spot welding mode and are used as supporting points of the first tool ring, the first tool ring is prevented from falling off and being separated from a set position in the heat treatment process, and the first tool ring is made of austenitic stainless steel; the second tool ring is made of austenitic stainless steel, the second tool ring is tightly attached to an inner component in the lower cylinder body in a position to prevent the heat treatment deformation of the inner component, meanwhile, 3 pieces of second supporting blocks made of N10003 materials are uniformly welded to the lower cylinder body in a circumferential direction and tightly attached to the second tool ring to prevent the second tool ring from falling off and separating from a set position in the heat treatment process, the pull ribs of the inner component are made of the N10003 materials, the pull ribs of the inner component are firmly welded with the side wall of the lower cylinder body and the surface of the inner component respectively, the pull ribs of the inner component and the second tool ring act together to prevent the angular deformation of the inner component in the heat treatment process from influencing the planeness of the inner component, the austenitic third tool ring and the N10003 third supporting block are arranged on the upper side of the orifice of the forged pipe A1 in the same manner in a spot welding manner, the third tool ring and the first tool ring are symmetrically arranged on the upper side and the lower side with the forged pipe A1 as the reference, and the austenitic fourth supporting block made of, meanwhile, the position of the forged pipe A3 is prevented from deforming in the heat treatment process, through holes are formed in the bottom plate and the partition plate, at the moment, the through holes, the forged pipe A1, the forged pipe A2 and the forged pipe A3 form a hot air circulation cavity which is used for smooth circulation of hot air in the heat treatment process, the internal and external temperature gradients of the main container are reduced, the temperature uniformity of the heat treatment is better, and the forged pipe A1, the forged pipe A2 and the forged pipe A3 are sequentially arranged in the direction from the lower end enclosure to the upper flange;
s2: performing heat treatment on the reactor core surrounding barrel, wherein the reactor core surrounding barrel adopts a vertical structure for heat treatment, and the bottom plate and the partition plate are horizontally placed on a furnace body bearing point in the furnace to provide a placing plane and an isolation effect of the reactor core surrounding barrel; two groups of austenitic stainless steel fifth tool rings are arranged at openings at two ends of the upper enclosure, 3 fifth supporting blocks made of N10003 materials are respectively arranged below the two groups of austenitic stainless steel fifth tool rings, and the fifth supporting blocks are uniformly distributed in the circumferential direction and are welded to the inner wall of the upper enclosure in a spot mode, so that the fifth tool rings are prevented from falling in the heat treatment process; two groups of austenitic steel pipes are perpendicularly welded on the fifth tooling ring in a crossed mode, and the function of rigidly restraining the fifth tooling ring is achieved; two groups of austenitic stainless steel fifth tool rings are arranged at openings at two ends of the lower enclosing cylinder, 3 fifth supporting blocks made of N10003 materials are respectively arranged below the two groups of austenitic stainless steel fifth tool rings, and the fifth supporting blocks are uniformly distributed in the circumferential direction and are welded to the inner wall of the lower enclosing cylinder in a spot mode, so that the fifth tool rings are prevented from falling in the heat treatment process; two groups of austenitic steel pipes are perpendicularly welded on the fifth tooling ring in a crossed mode, and the function of rigidly restraining the fifth tooling ring is achieved; the bottom plate assembly is horizontally placed on an austenitic stainless steel isolation plate, iron ions of a carbon steel bottom plate are prevented from polluting the bottom plate assembly, an austenitic stainless steel isolation ring is horizontally placed on the surface of the bottom plate assembly, a thick-plate carbon steel or low alloy steel pressing ring is pressed above the isolation ring, a carbon steel or low alloy steel corner brace is buckled on the pressing ring, two ends of the corner brace are firmly welded with the pressing ring and the bottom plate respectively, the bottom plate assembly is flatly attached to the stainless steel isolation plate, the deformation of a lower flat plate of the bottom plate assembly in the heat treatment process is prevented, an austenitic stainless steel fifth tool ring and a fifth supporting block made of N10003 materials are arranged at the upper opening of the bottom plate assembly, the contraction deformation of a port is prevented, and after the equipment placement and the tool arrangement are completed, the bottom plate assembly is placed into a.
2. The method for heat treatment of the thorium-based molten salt main vessel and the core shroud as claimed in claim 1, wherein: and in the S1, gaps of 1mm are reserved between the first tool ring, the second tool ring, the third tool ring and the fourth tool ring and the inner wall of the main container cylinder in the circumferential direction and are used as deformation rate buffer allowance.
3. The method for heat treatment of the thorium-based molten salt main vessel and the core shroud as claimed in claim 1, wherein: in the step S1, the first support block, the second support block, the internal member tie bar, the third support block and the fourth support block are directly welded to the main container, so that the material of the main container is prevented from being diluted by adopting N10003; all other material parts are not welded with the main container.
4. The method for heat treatment of the thorium-based molten salt main vessel and the core shroud as claimed in claim 1, wherein: and the S1 medium carbon steel or low alloy steel part is not directly contacted with the main container, and is isolated by adopting austenitic stainless steel parts.
5. The method for heat treatment of the thorium-based molten salt main vessel and the core shroud as claimed in claim 1, wherein: and a gap of 1mm is reserved between the fifth tooling ring and the inner wall of the reactor core surrounding barrel in the circumferential direction in the S2 and is used as a deformation rate buffer allowance.
6. The method for heat treatment of the thorium-based molten salt main vessel and the core shroud as claimed in claim 1, wherein: the fifth supporting block in the S2 needs to be directly welded with the reactor core shroud, so that the reactor core shroud is prevented from being diluted by adopting the N10003 material, and other material components are not welded with the reactor core shroud.
7. The method for heat treatment of the thorium-based molten salt main vessel and the core shroud as claimed in claim 1, wherein: and the S2 medium carbon steel or low alloy steel components are not directly contacted with the reactor core shroud, and are isolated by adopting austenitic stainless steel components.
8. The method for heat treatment of the thorium-based molten salt main vessel and the core shroud as claimed in claim 1, wherein: and (3) carrying out size stabilization heat treatment by adopting heat treatment process parameters of 400 ℃ at a rising and cooling rate of less than or equal to 55 ℃/h, a heat preservation temperature of 760-790 ℃ and a heat preservation time of 360-380 min.
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| CN103862215A (en) * | 2014-03-26 | 2014-06-18 | 南京工程学院 | Assembly welding tool device and method commonly used for large curved surface end sockets of pressure containers |
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| CN206438168U (en) * | 2017-02-24 | 2017-08-25 | 成都赛飞斯金属科技有限公司 | Travellers QPQ handles special mould clamp |
| CN207435506U (en) * | 2017-04-18 | 2018-06-01 | 大明重工有限公司 | A kind of quick despatch cylinder inner support |
| CN108728623A (en) * | 2017-04-21 | 2018-11-02 | 兰州兰石重型装备股份有限公司 | Combined type double plate thread-locking ring exchanger heat handles anti-deformation device and its application method |
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| CN102534164A (en) * | 2010-12-09 | 2012-07-04 | 上海重型机器厂有限公司 | Method and tool for reducing deformation in large-scale thin-wall cylindrical forging heat treatment |
| CN102492820A (en) * | 2011-12-27 | 2012-06-13 | 上海锅炉厂有限公司 | Method for preventing heat treatment deformation of thin wall pressure vessel cylindrical shell with major diameter |
| CN103862215A (en) * | 2014-03-26 | 2014-06-18 | 南京工程学院 | Assembly welding tool device and method commonly used for large curved surface end sockets of pressure containers |
| CN206052095U (en) * | 2016-09-06 | 2017-03-29 | 中国石油化工股份有限公司 | A kind of detachable cartridge heat treatment arranging apparatus |
| CN206438168U (en) * | 2017-02-24 | 2017-08-25 | 成都赛飞斯金属科技有限公司 | Travellers QPQ handles special mould clamp |
| CN207435506U (en) * | 2017-04-18 | 2018-06-01 | 大明重工有限公司 | A kind of quick despatch cylinder inner support |
| CN108728623A (en) * | 2017-04-21 | 2018-11-02 | 兰州兰石重型装备股份有限公司 | Combined type double plate thread-locking ring exchanger heat handles anti-deformation device and its application method |
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