Forming method for integral hanging basket cylinder structure of reactor internal components

Abstract

The invention belongs to the field of reactor structure design, and in particular relates to a method for forming the integral hanging basket structure of reactor internal components; the purpose of the invention is to provide a method for manufacturing The forming method of the integrated hanging basket cylinder structure of the reactor internals is released; the production of various plates, forgings and welding materials is canceled, and the procurement cycle is shortened; all welds, including All the full-penetration joint welds and cobalt-based alloy wear-resistant surfacing welding technology of the hanging basket cylinder avoid the welding deformation of the structure and improve the forming quality; the integrally formed hanging basket cylinder is adopted, with good structural continuity and mechanical strength The performance is better; the structural material performance of the integrally formed hanging basket cylinder is uniform, especially there is no difference in the material performance in the thickness direction of the structure; the manufacturing cycle is greatly shortened, and the manufacturing process is greatly simplified.

Description

technical field [0001] The invention belongs to the field of reactor structure design, and in particular relates to a method for forming a structure of an integral hanging basket cylinder of reactor internal components. Background technique [0002] The reactor internals are the key main equipment of the reactor, and the basket cylinder is its key component. Based on the existing manufacturing technology, the structure of "forging + welding, plate rolling + welding, thick forging, forging + plate + welding" is generally used for the hanging basket cylinder. With the increase of reactor power, the structure of the hanging basket cylinder The traditional manufacturing process of forging (or plate) + welding faces a series of problems: [0003] (1) The manufacturing capacity is close to the limit, and the profile manufacturing is difficult [0004] The increase in power causes the size of the basket cylinder to increase, such as the outer diameter of the basket cylinder and t...

AI Technical Summary

Problems solved by technology

[0004] The increase in power causes the size of the basket cylinder to increase, such as the outer diameter of the basket cylinder and the thickness of the core support plate. The limit of the existing heavy equipment is exceeded, and the manufacture of materials is faced with the technical challenges of rolling capacity, forging capacity and hardenability

Although the existing equipment can complete the manufacture of large-scale advanced pressurized water reactor internal component plates and extra-large thick forgings, it is unfavorable for material properties, especially the performance of the entire forging will be very uneven, which may reduce the overall performance of the product

[0005] (2) Long manufacturing cycle becomes the bottleneck of engineering construction

[0007] (3) The utilization rate of raw materials is low and the economy is not good

[0008] In the traditional manufacturing process, the forging production process needs to be peeled many times, and a large machining allowance needs to be left, which makes the material utilization rate of the traditional manufacturing process very low, which not only causes waste of materials, but also increases the manufacturing unit. Energy consumption, it is difficult to substantially improve material utilization through simple technological innovation

[0009] (4) The manufacturing process is complex and the product performance is low

The manufacturing process of the component is extremely complicated, especially due to the extensive use of welded connections, the precision of the component (such as the roundness, coaxiality, verticality, parallelism with the lower surface of the flange, etc.) of the hanging basket cylinder is difficult to meet the design Requirements pose a high challenge to the manufacturing level of the factory, and thus produce a large number of non-conforming items, which seriously affect the overall performance of the product

[0011] 3D printing (additive manufacturing) technology is a new type of material forming technology that has emerged in recent years. It is currently mostly used in the manufacture of small parts in the fields of medical treatment and aviation. The additive manufacturing technology of heavy metal components has not been commercially applied in nuclear power before. the case

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