Due to the excellent high-temperature mechanical properties and corrosion resistance

superalloys are widely used in critical components such as blades of aero-engines and gas turbines. In the long-term service process under high temperature

high pressure and corrosive environment

damages such as cracks and abrasion are easy to appear

leading to the failure of components. Laser additive manufacturing provides a new feasible way for the repair and reuse of damaged components such as superalloy blades. The application status of laser repair technology in superalloy blades and other components was reviewed

focusing on main problems and research status in aspects of stray grain and cracks. The new methods of laser repairing superalloys were summarized

and the future development trend was prospected.