Patent ID: 7685712
Filing Date: 2010-03-30
Classification: B23P,C25D,F01D,Y10T

Abstract:
1. A method for repairing a worn surface of a variable-pitch blade for a turbomachine, said surface being a rubbing surface and exhibiting a deficit of material as a result of wear thereof, the method comprising: filling said deficit of material by depositing a metallic product using electrolysis, said metallic product being deposited on said surface of the blade by buffer electrolysis performed by providing a single buffer electrode made of graphite which is impregnated with an electrolytic solution and which is moved along inside said deficit, then forming at least one thin layer of a hard material with a low coefficient of friction on the deposited metallic product and on the surrounding part of said surface, wherein said thin layer of said hard material is an outer layer that forms a new rubbing surface of said variable-pitch blade, and wherein said thin layer of said hard material has a hardness higher than that of the deposited metallic product.