Patent ID: 8822874
Filing Date: 2014-09-02
Classification: B23K,C23C,Y10T

Abstract:
1. A method for repairing a gas turbine compressor blade using a microplasma spray coating apparatus, comprising: providing a hand controlled and operated microplasma spray gun having a nozzle, an external anode connected to an exterior of said nozzle and disposed through an anode holder, and an electrode passing through said nozzle; spacing said hand controlled and operated microplasma spray gun from the compressor blade; injecting inert arc gas through an electric arc generated by the spray gun; ionizing the arc gas with the electric arc to form a plasma gas stream; injecting powdered material into the plasma gas stream; and spray coating a localized area of the compressor blade with the powdered material without masking the compressor blade and without utilizing a dedicated spray coating facility.