Steam turbine components having duplex coatings for improved...

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

F - Mech Eng,Light,Heat,Weapons

01

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117/157, 170/84,

F01D 5/28 (2006.01) C23C 8/00 (2006.01) C23C 8/70 (2006.01) C23C 28/04 (2006.01) F01D 25/00 (2006.01)

Patent

CA 2037000

55,708 ABSTRACT OF THE DISCLOSURE 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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