Production of K4537 superalloy gas turbine impeller by investment casting was described

and investment casting process was investigated systematically. The results show that it reduces the development time and production cost by rapid prototyping technology to produce mold shell. Porosities in the turboshaft can be effectively eliminated by adopting spherical running and feeding system and using suitable pouring and mold temperature. Filling of thin-walled blade can be ensured effectively by covering a layer of insulation blanket on blade. The gas turbine impeller with desirable metallurgical quality was successfully produced by adopting those methods

meeting the requirements of the design and use.