Method for producing an abradable spray coating

C - Chemistry – Metallurgy – 23 – C

Patent

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Details

C23C 4/00 (2006.01) C23C 4/12 (2006.01) F01D 5/28 (2006.01)

Patent

CA 2679651

Disclosed is a method for producing a spray coating, particularly an abradable spray coating for parts of a turbine engine by means of a thermal spraying process. An online process monitoring system, especially a PFI unit and/or a spectrometer unit, is provided for monitoring and regulating the thermal spraying process. In the disclosed method, at least one process parameter is calculated according to formula pB1 = pB2 + HB1 - HB2 - (.DELTA.x ~y)/z + n, wherein pB1 is the process parameter of the part that is to be coated, pB2 is the process parameter of a previous coating, HB1 is the hardness of the spray coating that is to be coated, HB2 is the hardness of the previous spray coating, .DELTA.x is a process variable of the online process monitoring system, and y, z, and n are constant parameters.

L'invention concerne un procédé de production d'une couche de protection appliquée par projection, en particulier d'une couche de protection apte au rodage appliquée par projection thermique et destinée à des composants d'un moteur à turbine, un système de contrôle de processus en ligne, en particulier un ensemble d'imagerie de flux de particules (PFI) et/ou un ensemble spectromètre, étant prévu pour contrôler et réguler la projection thermique. Selon l'invention, au moins un paramètre de processus est calculé d'après la formule pB1 = pB2 + HB1 - HB2 - (.DELTA.x ~y)/z + n, pB1 représentant le paramètre de processus du composant à enduire, pB2 représentant le paramètre de processus d'un revêtement précédent, HB1 représentant la dureté de la couche de protection à appliquer par projection, HB2 représentant la dureté de la couche de protection précédente, .DELTA.x représentant une grandeur de processus du système de contrôle de processus en ligne et y, z, n désignant des paramètres constants.

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