Aero-engine blades are subjected to complex and harsh environment in the long term. Due the extremely hostile temperature and pressure

blades are prone to various types of defects. Since the replacement of blades is exceedingly expensive

the research on repair and reconstruction of blade has enormous economic benefits. Aero-engine blades mainly contain nickel-based superalloy gas turbine blades and titanium-based compressor blades. Because of the difference in service environment and material

the defects of two types of blades are different

the repair method and the performance to be achieved after the repair are different. In this paper

the repair methods and key technologies adopted at the current stage for the common damage defects of the two types blades are analyzed

which aims at providing a fundamental guideline for high quality repair and remanufacturing of aero-engine blades.