Patent ID: 7172787
Filing Date: 2007-02-06
Classification: C23C,F01D,F05C,F05D,Y02T

Abstract:
1. A method of repairing a Ni-based alloy part having an undercoat layer and a topcoat layer stacked on a Ni-based alloy base when the topcoat layer is damaged, comprising the steps of: removing a damaged portion of the topcoat layer without removing all of the topcoat layer and removing a denatured portion of the undercoat layer corresponding to the damaged portion; forming another undercoat layer in a removed portion, where the original undercoat layer has been removed, by spraying; and forming another topcoat layer formed of ZrO wherein said topcoat layer and said another topcoat layer are formed of different materials, and wherein said undercoat layer is formed of Co-based MCrAlY, and said another undercoat layer is formed of a Ni-based MCrAlY having oxidation resistance.