China Guangdong Nuclear Power Group, "metal 3D printing applied to the field of nuclear power key technology research" made major achievements in stages, the use of constituency laser melting 3D printing technology successfully manufactured nuclear power plant complex flow meter valve body. After the basic performance test, the chemical composition and basic mechanical properties of the valve body meet the requirements of the international nuclear power standard RCC-M. The engineering application of this component will enable the application of "zero" breakthrough in the field of nuclear power for metal 3D printed manufacturing components.
The trial valve body length 140 mm, width 76 mm, height 56 ​​mm, the material for the nuclear power material Z2CND17-12 (316L stainless steel), the internal flow channel is complex, demanding, is a typical nuclear pressure components. If the traditional manufacturing process, you need to forging, precision machining, long manufacturing cycle and process complexity. The project uses SLM technology, the use of laser scanning metal powder layer by layer, and gradually stacked out of the valve body shape and complex internal flow channel, a molding, saving materials and improve the stability of parts, compared to the traditional process can shorten the manufacturing cycle , And meet the requirements of fast production in small quantities, reducing costs and so on.
As a major technological revolution in the field of manufacturing, 3D printing technology has been listed as a strategic emerging industry technology in China. CGNPC is currently the first company in China to conduct systematic research on metal 3D printing technology in the field of nuclear power. The successful trial of this valve body will lay a solid foundation for CGNPC to set up a joint R & D center for nuclear metal 3D printing and will also help CGN play a leading role in the equipment manufacturing industry chain and set a benchmark for nuclear metal 3D printing applications. It will lead China's nuclear power Industrial Development. Follow-up China Guangdong Nuclear Power will continue to carry out 3D printing design optimization, parts repair, materials and technology research, the establishment of the standard system and other related research.
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