Process for coating the notch of a nickel substrate with laser.

摘要

Process for coating a notch (2) of a component in the shape of an "inverted Z" made of nickel alloy, the said notch (2) consisting of a rounded bottom (3) in the hollow of the "inverted Z" followed by a planar wall (4) corresponding to the intermediate part of the "inverted Z" in which a number of layers (5, 5') of antiwear metallic material are deposited on the planar wall (4) of the notch (2). The deposition is performed by a laser whose beam (8) forms a constant angle with the powder beam (9). During the deposition of the first layer (5) the laser beam 8 forms an angle alpha 1 of several tens of degrees with the normal to the planar wall. During the deposition of the subsequent layers (5) the laser beam (8) forms an angle alpha 3 close to the normal to the rounded part (3) before rising again until it forms the angle alpha 1 which it maintains during the remainder of the run. <IMAGE>