Abstract: A method of repairing a turbomachine blisk having at least one damaged zone by build-up of metal in the damaged zone using a laser build-up welding machine is disclosed. The method includes preparing the damaged zone by machining the damaged zone to obtain a zone of defined profile to be repaired, build-up welding of a start-of-run test piece that includes the defined profile using the laser build-up welding machine, checking geometric and metallurgical quality of the test piece, and build-up welding the zone to be repaired of the blisk using the laser build-up welding machine.

Abstract: To repair the blade, a patch is welded by an electron beam. The method starts by machining the damaged zone so as to obtain a zone to be repaired having a defined profile; welded on to a first test piece element corresponding to the blade, having said defined profile, is a second test piece element, corresponding to the patch, in order to obtain a start-of-run test piece; the quality of this test piece is verified and, if it corresponds to the repair acceptance criteria, the patch is welded on to the zone to be repaired using the same electron-beam welding machine without changing its operating parameters, and the repaired zone is reworked by machining.

Abstract: To repair the blade, a patch is welded by an electron beam. The method starts by machining the damaged zone so as to obtain a zone to be repaired having a defined profile; welded on to a first test piece element corresponding to the blade, having said defined profile, is a second test piece element, corresponding to the patch, in order to obtain a start-of-run test piece; the quality of this test piece is verified and, if it corresponds to the repair acceptance criteria, the patch is welded on to the zone to be repaired using the same electron-beam welding machine without changing its operating parameters, and the repaired zone is reworked by machining.

Abstract: The method allows the mechanical characterization of a metallic material relative to a material constituting a part to be repaired and the validation of an installation for repairing said part by build-up welding with said metallic material. According to this method, a cavity is machined in a bar of said metal, the cavity is build-up welded by means of said installation, a test piece is cut from said bar so that it has a central zone consisting only of build-up weld metal and the test piece is subjected to an axial vibration fatigue test.

Abstract: The present invention relates to a method of repairing a one-piece bladed disc or blisk of turbomachine having at least one damaged zone, by build-up of metal in said damaged zone by means of a build-up welding machine, which comprises the steps of preparing the damaged zone, of building up the zone with metal and of re-work of the repaired zone. The method is characterized in that: the preparation step comprises the machining of the zone so as to obtain a defined profile; the build-up welding operation is carried out on a test piece, called start-of-run test piece, having said defined profile, using a build-up welding machine, which is a laser-type machine and the operating parameters of which are preset; the quality of the test piece after build-up welding is checked; and, if the quality of the test piece corresponds to the acceptance criteria, the zone to be repaired is built up using the same machine without changing the operating parameters thereof.

Abstract: The invention relates to a friction plug welding method for a hole in a metal part, opening out onto a front surface and a back surface of the part, in which a rotational metal bar is inserted into the hole, on its front side, to be friction welded. The method according to the invention is characterised in that a restraint part, comprising a cavity, is placed on the back side of the part during friction welding. The method according to the invention authorises the welding of fast softening materials whilst ensuring a support for the weld mix.

Abstract: The invention concerns a friction plug welding method, for a hole, extending globally along an axis, in a metal part, failing any clearance space in the axis of the hole, because of at least one obstacle on said axis, wherein a metal bar, extending globally along an axis, is rotated around its axis and is inserted into the hole, to be friction welded therein. The method of the invention is characterised in that the axis if the bar is tilted with respect to the axis of the hole of a non-zero angle (?) to avoid the obstacle. Thus, thanks to the method of the invention, it is possible to reach holes difficult of access, while orienting the axis of the bar suitably.