| 摘要 |
PURPOSE: To provide a method for joining together fitting crystal turbine blade halves, particularly with the thin-walled portions of the halves, to substantially exclude the influence of heat within a base metal by use of an electrodeposition method, particularly an electrospark deposition method, and to enable complete and uniform filling of joining areas when misalignment exists between the fitting halves. CONSTITUTION: Nickel based superalloy turbine blades 10 are formed by fusion welding together two fitting blade halves 12, 14. The fitted blade halves 12, 14 are joined by an electrospark deposition process which deposits a weld filler metal along the fitted joining 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 substantially nonexistent. |
