Method for manufacturing turbine blade and manufactured turbine blade
AssigneeHitachi, Ltd.
InventorsTakeshi Tsukamoto, Kunio Miyazaki, Masahisa Inagaki
Life of this patent
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Abstract
In a joining method for manufacturing a rotor blade by joining a plurality of members, the members are pressed so as to exert a predetermined pressure on the bonding interface, a pulse voltage is applied to the members to pass electric current therethrough, and the joint portion is heated by resistance heating generated at the bonding interface and in the bulk of the members to cause diffusion bonding and thereby to join the members to each other. By this method, good joining can be achieved without substantially changing the crystal structure and mechanical properties of the base metals.
Claims19
A method for manufacturing a turbine blade by manufacturing an airfoil portion of a turbine blade comprising the airfoil portion and a dovetail portion through joining a plurality of members, comprising the steps of:
- bringing the members to be joined into contact with each other, and applying pressure to the members to keep the contact state thereof;
- and
- applying a pulse voltage to the members to pass an electric current therethrough so as to heat the bonding interface by resistance heating for diffusion bonding.
A method for manufacturing a turbine blade by manufacturing an airfoil portion of a turbine blade comprising the airfoil portion and a dovetail portion through joining a plurality of members, comprising the steps of:
- bringing the members to be joined into contact with each other, and applying pressure to the members to keep the contact state thereof;
- and
- applying a pulse voltage to the members to pass an electric current therethrough so as to heat the bonding interface by resistance heating for diffusion bonding,
- wherein the members to be joined are subjected to ultrasonic vibration during heating by the passing of electric current.
A turbine blade comprising an airfoil portion and a dovetail portion, the airfoil portion formed by joining a plurality of members, wherein the airfoil portion is formed by diffusion bonding of the members.
Dependencies are inferred from the claim text.