Patent ID: 8677621

Claim:
A method for repairing a compressor rotor designed in blisk technology and having a plurality of blisks joined together to form a one-piece assembly, comprising: severing from the rotor and removing an entire damaged stage of a blisk having integral blades, the severing being performed away from the integral blades; replacing the entire damaged stage of the blisk with an undamaged blisk stage; joining the undamaged blisk stage to the rotor by electron-beam welding; and subsequently to the electron-beam welding and not before or during the electron-beam welding, subjecting only a weld joint and a locally confined area adjacent to the weld joint which has been affected by a heat of the weld to local stress-relieving thermal treatment by a current induced into the component by electro-magnetic induction for heat generation, the current induced into the component for heat generation being confined to the weld joint and the locally confined area adjacent to the weld joint such that a temperature required for the stress-relieving thermal treatment is produced only in the weld joint and locally confined area adjacent to the weld joint, peripherally along the weld joint, away from the integral blades.