The invention discloses a preparation method for a
metal part. The preparation method comprises the following steps that 1,
metal powder is taken, added with an organic binder under the dark condition and uniformly mixed, then an antifoaming agent is added into the
metal powder and uniformly mixed, and after bubbles fade away, surface impurities are removed, so that mixed
slurry is obtained; 2, the mixed
slurry is put into 3 D printing forming equipment to be printed layer by layer by utilizing controllable
ultraviolet light beams, through the mode of surface
exposure or
spot scanning and according to a three-dimensional model of the part, and hence a metal part rough blank is prepared; 3, the metal part rough blank is subjected to low-temperature
degreasing treatment, so that the organic binder in the rough blank evaporates and overflows; and 4,
hot isostatic pressing treatment is conducted on the metal part rough blank, and therefore the compact metal part is obtained. According to the preparation method for the metal part, the principle of
light curing rapid prototyping is adopted, the shape of the part is unrestrained, the process is simplified, the manufacturing cycle is shortened, and the product compactness is good.