Splice insert repair for superalloy turbine blades

摘要

A damaged portion of a superalloy material turbine blade body is removed, forming an excavated recess. A repair splice is formed of a same material with similar mechanical structural properties, having a mating outer profile conforming to the corresponding recess profile. The repair splice is inserted and captured within the recess, so that the blade body and repair splice are mechanically interlocked. Given similarities in mechanical properties of both the blade body and the mechanically interlocked splice the repaired blade's overall mechanical structural properties are similar to those of an undamaged blade. The repair splice is affixed to the blade body so that the interlocking respective portions of each do not separate. Localized affixation and subsequent cosmetic blade surface repair can be performed with softer, low temperature application braze and weld alloys.

主权项

1. A repaired turbine blade comprising, a turbine blade body that defines a hollow portion and an excavated recess having a curved profile that facilitates repair splice insertion from inside the hollow portion toward an exterior surface of the blade body, the recess profile defined by a radius of curvature axis that is generally parallel to an adjoining hollow portion defined interior surface or exterior surface of the blade body and laterally offset therefrom; and
a mating, mechanically interlocking repair splice inserted and captured within the recess, with the repair splice affixed to the blade body for retention thereof, having a repair splice outer profile conforming to the radiused curve recess profile.