European Gas Turbines Sa

Frederic Cariou

Emmanuel Kerrand

Didier Boucachard

A method of coating a notch in an 'upsidedown Z-shape' part of nickel alloy, said notch being constituted by a rounded end wall in the hollow of the 'upsidedown Z-shape' followed by a plane wall corresponding to the intermediate portion of the 'upsidedown Z-shape' in which a plurality of layers of anti-wear metal material are deposited on said plane wall of the notch. Deposition is performed by a laser whose beam forms a constant angle with the jet of powder. While depositing the first layer the laser beam forms an angle .alpha..sub.1 of several tens of degrees with the normal to the plane wall. While depositing subsequent layers the laser beam initially forms an angle .alpha..sub.3 close to the normal to the rounded portion before being tilted up to the angle .alpha..sub.1, which it then retains throughout the remainder of the pass.

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Paray Vieille Poste, France

Frederic Cariou