HYBRID BONDED TURBINE ROTORS AND METHODS FOR MANUFACTURING THE SAME

摘要

Hybrid bonded turbine rotors and methods for manufacturing the same are provided. A method for manufacturing a hybrid bonded turbine rotor comprises the steps of providing turbine disk having a rim portion comprising a live rim of circumferentially continuous material and a plurality of live rim notches in an outer periphery of the turbine disk alternating with a plurality of raised blade attachment surfaces defining the outer periphery; providing a plurality of turbine blades, each of which comprising an airfoil portion and a shank portion, the shank portion having a base surface; metallurgically bonding a compliant alloy material layer to either or both of the raised blade attachments surfaces of the turbine disk and the base surfaces of the blade shanks; and linear friction welding the plurality of blades to the turbine disk so as to form a bond plane between the raised blade attachments surfaces of the turbine disk and the base surfaces of the blade shanks, the compliant alloy material layer being disposed at the bond plane.

主权项

1. A method for manufacturing a hybrid bonded turbine rotor comprising the steps of:
providing turbine disk having a rim portion comprising a live rim of circumferentially continuous material and a plurality of live rim notches in an outer periphery of the turbine disk alternating with a plurality of raised blade attachment surfaces defining the outer periphery; providing at least one turbine blade, the at least one turbine blade comprising an airfoil portion and a shank portion, the shank portion having a base surface; metallurgically bonding a compliant alloy material layer to either or both of one or more of the raised blade attachment surfaces of the turbine disk and the base surface of the blade shank, wherein the compliant alloy is bonded only to the one or more of the raised blade attachment surfaces and not any other portion of the turbine disk, only to the base surface of the blade shank and not any other portion of the at least one turbine blade, or only to both the one or more of the raised blade attachment surfaces and the base surface of the blade shank and not any other portion of the turbine disk or the at least one turbine blade; linear friction welding the at least one blade to the turbine disk so as to form a bond plane between the one or more of the raised blade attachments surfaces of the turbine disk and the base surface of the blade shank, the compliant alloy material layer being disposed at the bond plane.