During the development process of 50 MW heavy duty gas turbine blade of DongFang Steam Turbine

3 D printing resin blades was used to obtain accurate casting shrink factor which helps to constructe the wax mold. Moldflow software was firstly introduced into wax mold design and the simulation result shows that cold wax core can effectively reduce the non-uniform shrinkage which control the size of wax within the tolerance range. Sintered shell dimension was inspected by ATOS digital scanning of dissected shell and an innovation way was provided to analyze shell deformation. The casting results show that the shrinkage rate of the wax is set reasonably and the cold wax core process and molding process is contributed to ensure the final casting size.