The invention relates to the field of
precision casting, and discloses a
precision casting process for a stainless steel
impeller for
nuclear power, which comprises the following steps of: S1, pressing a
wax mold by using an
investment casting process, and connecting the
wax mold into a tree shape by using a
wax rod; s2, the surface of the wax mold is coated with a
refractory material, dewaxing is conducted through dewaxing equipment after
drying, a hollow shell is obtained, and then high-temperature
roasting is conducted; s3, selecting duplex stainless steel to be smelted in an electric furnace, heating
molten steel to a preset pouring temperature, and pouring the
molten steel into the shell from the bottom or the side; s4, the shell is removed after being naturally cooled, and
solution treatment is conducted on the
impeller; s5, carrying out
sand blasting, shot blasting and sand cleaning, and carrying out nondestructive inspection; wherein dewaxing equipment used in the step S2 comprises a tank body, a rotatable tray is arranged in the tank body, and a plurality of adjustable fixing clamps are arranged on the tray to meet the fixing requirements of different shells; the top of the tank body is provided with a feed port, a
discharge port and an automatic sealing door, and the bottom is connected with a wax liquid collecting tank and is internally provided with a
liquid level sensor; the inner wall of the tank body is provided with a heating cavity for containing heating elements, and the outer wall is wrapped with heat insulation materials.