The invention provides a method for preparing rare earth oxide doped tungsten and molybdenum spherical powders for 3D printing, and belongs to the technical field of powder metallurgy powder preparation. The specific preparation method is as follows: the rare earth oxide/tungsten oxide (molybdenum oxide) composite powder is prepared by the low-temperature solution combustion synthesis method, and then the rare earth oxide-doped nano-tungsten (molybdenum) powder is obtained by hydrogen reduction, and then spray granulation equipment is used to The nano powder is granulated, and the granulated powder is calcined, ground, and sieved to obtain spherical tungsten (molybdenum) powder that can be used for 3D printing. The raw materials of the invention are simple and easy to obtain, the equipment is simple, and the process is fast, can prepare a large amount of products in a short time, and is suitable for large-scale production. The rare earth oxides in the prepared tungsten and molybdenum spherical powders can be uniformly dispersed, and the particles are fine, no segregation of oxide particles occurs, and the addition amount of the rare earth oxides can be adjusted through a low-temperature solution combustion synthesis process. The prepared tungsten and molybdenum spherical powders have excellent sphericity and fluidity, and are extremely suitable for 3D printing processes.
