Patent ID: 7825348

Claim:
A method of repairing a blade of a one-piece bladed disc of a turbomachine that includes at least one damaged region by electron-beam welding of a patch using an electron-beam welding machine, comprising: machining the at least one damaged region of the blade to obtain a region to be repaired with a defined profile along a blade cutting line; welding a first test piece element with the defined profile to a second test piece element with the same material of the patch using the welding machine with preset operating parameters to obtain a start-of-run test piece; checking the weld quality of the start-of-run test piece based on a predetermined repair acceptance criteria; welding the patch on to the region to be repaired of the blade using the same electron-beam welding machine without changing the operating parameters thereof; and reworking the repaired region by machining, wherein the patch includes a profile along a patch cutting line, the patch cutting line exactly follows the blade cutting line, wherein a profile of the first test piece element is the same as the defined profile of the blade, and wherein a profile of the second test piece is the same as the profile of the patch.