| 摘要 |
The metal of the wall of the piece (13a) is melted and then solidified in a zone which includes defects, such as cracks, over a defined depth, by sweeping over the surface of the piece with the aid of a melting device (21). Next, a surface layer of the metal of the wall of the piece (13a), which has been melted and then solidified, is put into compression by repeated impacts from solid particles. Preferably, the melting is performed by a transferred-arc plasma (22) and the putting into compression by balls set into movement by a vibrating piece. The invention applies in particular to the repair of a tubular adaptor (13a) penetrating the head (1) of a nuclear reactor vessel. <IMAGE> |
