Application and qualification of handheld laser welding in nuclear power product
With the help of the flexible transmission technology of optical fiber,laser welding completely gets rid of the restriction that the traditional optical path is not easy to change,and derives the handheld laser welding e-quipment.Its flexibility greatly expands the application scene of laser welding,and has experienced three gener-ations of development and maturity,from solid-state lamp pumped laser,optical brazing laser to swing laser welding machine.However,at present,handheld laser welding is mainly used in a few industries such as con-struction and home decoration,and there is a lack of targeted evaluation system at the normative level.This pa-per takes the welding of 1 mm thin-walled neutron absorption plate cover plate of a nuclear power plant fuel grid as an example to explore the application,and studies the influence of laser frequency,pulse width and other pa-rameters on the weld size and penetration,realizing the high-quality and efficient welding of products,At the same time,a set of feasible evaluation rules and specifications for handheld laser welding process are proposed,which provides a detailed reference for the promotion and application of this process in the field of nuclear power and other important product manufacturing.
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