Superalloy castings such as aero-engine blades

turbine rear casings

and guides are core components of aero-engines. It is still difficult to manufacture castings with fully qualified size even though the material composition is completely known

which has become a challenge for independently developing aero-engine superalloy castings. Among all

investment casting is the main forming method of complex superalloy castings. Hence

this review comprehensively examined the development of investment casting technology for superalloys and analyzed casting defects such as shrinkage and compromised dimensional accuracy in the investment casting process. Additionally

the progress of domestic and foreign development in rapid prototyping of investment casting for aero-engine superalloy castings was introduced. Finally the research status of intelligent casting of aero-engine superalloy castings at home and abroad was summarized

and the development trend of precision forming technology for aero-engine superalloy castings was prospected.