Production method of fuel nozzle in gas turbine

The invention provides a production method of a fuel nozzle in a gas turbine. The production method of the fuel nozzle in the gas turbine comprises the following steps that (1) a fuel nozzle is printed by adopting a selective laser melting technology, the central axial direction of the fuel nozzle is selected as a printing growth direction during printing, and the gas inlet surface of the fuel nozzle is used as a printing bottom surface; (2) heat treatment is conducted, wherein vacuum heat treatment is conducted on the printed fuel nozzle in the step (1); (3) sand blasting treatment is conducted on the fuel nozzle obtained after heat treatment; and (4) fluid polishing treatment is conducted on the fuel nozzle obtained after sand blasting. The production method of the fuel nozzle in the gasturbine solves the problems of size, surface roughness and the like in the preparation process of the fuel nozzle, shortens the preparation period, achieves and even exceeds the technical indexes ofa traditional process (suc