ZHANG Yilin, ZHANG Yujia, ZHU Yonghui, et al.Development and Process Test of a Local Dry Underwater Laser Welding Device[J].Electric Welding Machine, 2024, 54(1): 50-54. DOI： 10.7512/j.issn.1001-2303.2024.01.09.
Development and Process Test of a Local Dry Underwater Laser Welding Device
A set of local dry underwater laser welding equipment has been developed to meet the underwater repair requirements of the corner positions of the spent fuel pool in nuclear power plants. It can achieve conventional underwater flat welding while focusing on the local dry underwater welding operation requirements of the fillet weld. At the same time, the device also has functions such as lighting for underwater welding positions, real-time monitoring of welding environment and welding process, and temperature and humidity monitoring of welding areas. The developed local dry underwater welding device was used to conduct underwater welding process tests on 304 stainless steel materials commonly used in the spent fuel pool of nuclear power plants. The results showed that the formation of underwater welding seams was good, and the macroscopic morphology, cross-sectional morphology, and metallographic structure of underwater welding seams were not significantly different from those formed in the air environment. The research results of this article lay a technical foundation for the underwater online repair of future spent fuel pools, as well as the underwater maintenance of key equipment in high-level environments such as nuclear power plant internals.
fillet weldlaser weldinglocal dry methoddevice development
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