Verfahren zum Nitrieren eines Werkstückes aus einer Titanlegierung und Vorrichtung zum Sprühen von Stickstoff und Inertgas.

摘要

Process for nitriding a workpiece (3) made of titanium alloy, in which a laser beam (2) is pointed at the workpiece (3) to obtain a slight surface melting of the region affected by the laser (1), nitrogen at high pressure is projected just behind the region (4) affected by the laser beam (1) so that the nitrogen enters the affected region (4) while it has become pasty, and an inert gas is projected around the nitrogen projection so that this projection covers with overlap the region (4) affected by the laser. The device according to the invention is characterised in that it comprises a central tube serving to convey nitrogen and a conduit, symmetrical in revolution around the axis of the central tube, whose inner and outer walls are conical, serving to convey the inert gas. Production of a hard surface layer 1 to 2 mm in thickness.