20150306736 | SURFACE TREATMENT OF A METAL PART BY OBLIQUE SHOT PEENING - A process for the surface treatment of a metal part comprises exposing a surface of the metal part to a stream of substantially spherical particles, so that any portion of said surface receives said particles along several primary incidences, the primary incidences of the particles on a portion of the surface being essentially distributed in a cone or a conical film which has an outer half apex angle between 10° and 45°, until a surface layer of nanostructures having in particular an average thickness of greater than 50 μm is obtained, the particles having a diameter of less than 2 mm and greater than 0.1 mm and being projected at a speed between 40 m/s and 100 m/s. | 10-29-2015 |