Method for joining single crystal turbine blade halves.

摘要

Single-crystal, nickel-based superalloy turbine blades (10) are formed by fusion-welding together two matched blade halves (12,14). The matched blade halves (12,14) are joined by an electrospark deposition process which deposits a weld filler metal along matched faying surfaces. The deposited weld filler metal is preferably the same nickel-based superalloy used to form the single-crystal turbine blades (10). Total heat input to the base metal is minimal so that distortion and metallurgical structure changes of the base metal are virtually non-existent.