Review of main manufacturing processes of complex hollow turbine blades

In view of their development at present, the advanced manufacturing processes of hollow turbine blades are reviewed thoroughly. There are several kinds of manufacturing technologies, including investment casting, laser metal direct forming and integrated manufacturing of ceramic cores shell, for hollow turbine blades, and their advantages and disadvantages are contrastively analysed. The development direction and the problems to be solved are put forward for manufacturing the hollow turbine blades to fulfil the increasing requirements of the high performance engine and energy conservation in the future.