Method of repairing directionally solidified and single crystal

Details Method of repairing directionally solidified and single crystal Method of repairing directionally solidified and single crystal

1996-11-14

1998-03-31

Cuda, Irene

Metal working

Method of mechanical manufacture

Impeller making

2988972, B23P 1500

Patent

active

057324670

ABSTRACT:
A new method is provided for repairing cracks in the outer surfaces of structural parts being a superalloy article having a directionally oriented microstructure, such as a blading member. The article may have internal passageways communicating through the end of the article. The method coats and seals cracked outer-surface areas of directionally solidified and single crystal structures by coating the defective area using a High Velocity Oxy-Fuel process (herein also referred to as HVOF), followed by hot isostatic pressing the part.

REFERENCES:
patent: 5009359 (1991-04-01), Stover et al.
patent: 5071054 (1991-12-01), Dzugan et al.
patent: 5280849 (1994-01-01), Galanes
patent: 5291937 (1994-03-01), Corderman et al.
patent: 5318217 (1994-06-01), Stinson et al.
"Gastight Plasma Sprayed Sealings for Hip Diffusion Bonding of Materials" by D. Stover, H.P. Buchkremer, R. Hecker and W. Mallener, Thermal Spray Research and Applications, Proceedings of the Third National Thermal Spray Conf, Long Beach CA, 25 May 1990, pp. 239-243 & Title Page.

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