Process for reloading a single-crystal or gradient...

C - Chemistry – Metallurgy – 23 – C

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C23C 4/02 (2006.01) B05D 1/12 (2006.01) B05D 3/00 (2006.01)

Patent

CA 2517239

A process for resurfacing a monocrystalline or directionally solidified metallic piece, having a thickness (Ws), in which a laser beam and a flux of metallic powder, whereof the nature is the same as that of the metallic piece, is applied to the piece to produce at least one layer of metal, monocrystalline or directionally solidified, from the piece, the laser beam being sent out at a power "P" and moving along the piece at a speed "v", wherein the laser beam and the flux of powder are applied coaxially on the piece and the P/v ratio is within the range defined on the figure.

L'invention concerne un procédé de rechargement d'une pièce métallique monocristalline ou à solidification dirigée, d'épaisseur (W s) inférieure à 2 mm, dans lequel on applique un faisceau laser et un flux de poudre métallique, dont la nature est la même que celle de la pièce métallique, sur la pièce pour fabriquer au moins une couche de métal, monocristalline ou à solidification dirigée, à partir de la pièce, le faisceau laser étant émis à une puissance "P" et se déplaçant le long de la pièce à une vitesse "v", caractérisé par le fait que le faisceau laser et le flux de poudre sont appliqués de façon coaxiale sur la pièce et le rapport P/v est compris dans la plage définie sur la figure.

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