The reporter learned from the Chinese Academy of Sciences Hefei Institute of Materials Science that the nuclear safety of the institute is China's anti-neutron irradiated steel (ie, “CLAM steelâ€) as raw material. The 3D printing technology is used to realize the key components of the fusion reactor – the first sample of the cladding. The trial production was carried out, and its organization and performance were studied and analyzed. The relevant results were recently published in the Journal of Nuclear Physics of the International Journal of Nuclear Materials.
3D printing technology can realize the integration molding of complex structures, has the characteristics of short manufacturing cycle, high material utilization, and is an important method for manufacturing complex components. The researchers used CLAM steel as raw material to conduct trial production of fusion reactor cladding components through 3D printing technology, and explored the feasibility of this technology in the manufacture of advanced nuclear energy system components such as fusion reactors to promote the rapid development and performance of complex nuclear energy system components. Optimize and promote its engineering application.
After a large number of experiments, the researchers realized for the first time the 3D printing of the neutron irradiated steel sample on the first wall of the fusion reactor cladding. The results show that the dimensional accuracy of the prototype meets the design requirements, and the density of the material reaches 99.7%, which is comparable to that of the traditional CLAM steel. At the same time, the study also found that the layer-by-layer melting and directional solidification characteristics of 3D printing lead to differences in the structure and properties of CLAM steels in different directions, and this difference can be effectively reduced or even eliminated in the future through scanning scheme optimization and melt pool nucleation optimization. .
The above research shows that 3D printing technology has a good application prospect in the production of complex nuclear reactors and other advanced nuclear energy system components. At the same time, it demonstrates China's strong R&D capabilities in 3D printing advanced nuclear energy system components. (Reporter Wu Changfeng)
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