Steam turbine components having duplex coatings for improved ero

Details Steam turbine components having duplex coatings for improved ero Steam turbine components having duplex coatings for improved ero

1992-04-13

1993-03-02

Wyszomierski, George

Metal treatment

Process of modifying or maintaining internal physical...

Carburizing or nitriding using externally supplied carbon or...

148220, 148525, 148529, 427249, 427580, 427586, B05D 310, C23C 870

Patent

active

051905981

ABSTRACT:
The steam turbine components having erosion resistant multiple treatments are disclosed. The components include a ferrous substrate having an integral boride layer which typically reduces the underlying fatigue strength of the substrate and includes cracks or defects disposed therein. The boride layer is coated with a sealing layer to substantially cover the cracks or defects for improving the surface erosion resistance and restorings the substrate fatigue strength of the steam turbine component.

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