Patent ID: 9085010
Filing Date: 2015-07-21
Classification: B05D,B23K,F01D,F05D,Y10T

Abstract:
1. A method of repairing a component comprising the steps of: a) removing a prior coating from an underlying metal substrate, there being small cooling air holes extending through said substrate and said prior coating that is to be removed; b) placing a new coating on the substrate, and over cooling air holes, said new coating including a bond layer directly deposited on the substrate and an outer coating deposited on the bond layer; c) identifying the location of the cooling air holes by inspecting the coated component for the location of indicators of the new coating passing over the cooling air holes, the identification step being performed by one of laser scanning and part probing; d) using the identified location of the indicators to control a cutting tool to remove coating from the cooling air holes, the removal step being performed by one of laser drilling and electro-discharge machining; and e) placing a top coat outwardly of the new coating prior to step c), the new coating including a first material and the top coat including a second material different from the first material, wherein the step of identifying the location of the cooling air holes is based on a formation of the top coat on said new coating; wherein the top coat is boron nitride.