Manufacture technique for thermonuclear reactor flow-passage containing parts

Abstract

The invention discloses a production process applicable to runner-containing parts in a fusion reactor blanket. The production process includes the steps: first, a plate and a runner-containing rectangular tube are manufactured according to the design and undergo precision surface working, the roughness Ra is less than 6.3Mum; second, the runner-containing parts are cleaned and decontaminated and then heated in vacuum for degassing; third, the runner-containing parts are vacuumized in an electron beam welding machine and the periphery of the surface to be welded is hermetically welded; and then the runner-containing parts are put into a hot isostatic pressing furnace for forming by hot isostatic pressing diffusion welding; finally, bending forming, heat treatment and machining, and the like, are performed. By adopting the production process; the runner-containing parts manufactured by the production process have reliable and uniform comprehensive performance without the weak performance zones of the heat affected zone, and the like, resulting from the fusion welding process or the defects such as element segregation and air vent, and the like, existing in the similar casting parts, thereby, the production process is particularly applicable to the production of the runner-containing part with the fusion reactor blanket under the condition of intense neutron radiation.

Description

technical field [0001] The invention relates to a manufacturing process suitable for components containing flow channels in the cladding of fusion reactors. Background technique [0002] The cladding of the fusion reactor is one of the core components of the fusion reactor. Its main function is to convert the energy of fusion particles (neutrons and α-ions) into usable energy while multiplying tritium to maintain the fusion reaction. The cladding of the fusion reactor is closest to the fusion plasma, and the environment is harsh. Its high temperature, strong neutron irradiation and complex stress environment pose great challenges to the development of structural materials and cladding. Low-activation ferrite / martensitic steel (RAFM steel) has superior properties such as high thermal conductivity, good resistance to radiation swelling, and a relatively mature industrial foundation. It will become the future fusion demonstration reactor and the first The preferred cladding st...

AI Technical Summary

Problems solved by technology

And according to the needs of the first wall (such as attached figure 1 shown) and the design of the cooling plate contains multiple groups of rectangular or circular coolant flow channels, the structure is complex

Conventional processing methods cannot be used to manufacture parts with flow channels that meet the requirements of precision and performance. For example, although casting methods can be used to manufacture parts of this shape, segregation, shrinkage cavities, and internal crystallization of cast parts are difficult to overcome during casting. It cannot meet the service requirements under such harsh conditions; if the first wall is prepared by the conventional fusion welding method, there will be a very long weld, the quality is difficult to control, and the performance of the weld is quite different from that of the base material, it is difficult Meet the operating requirements of the first wall harsh environment

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