Repair coating for superalloy articles, such as gas turbine engi

Details Repair coating for superalloy articles, such as gas turbine engi Repair coating for superalloy articles, such as gas turbine engi

1994-02-07

1995-08-01

Rosenberg, Peter D.

Metal treatment

Compositions

Fluxing

148 22, 148 24, 420559, B23K 3534

Patent

active

054377374

ABSTRACT:
A repair coating for superalloy articles, such as gas turbine engine components, includes a volatile organic carrier or water-based carrier, a fluxing agent, a thickening agent, balance a filler mix. The filler mix consists of at least two distinct particulate components. The mix includes a first particulate component having a composition which approximates that of the article being repaired. The mix also includes a second particulate component having a composition approximating that of the article and a melting point depressant, such as boron. This melting point depressant is substantially in excess of that in the article and sufficient to provide melting of a portion of the mix at a processing temperature below the melting temperature of the article. The above filler mix is blended with the other constituents to form the repair coating which is applied to an article.

REFERENCES:
patent: 4008844 (1977-02-01), Duvall et al.
patent: 4073639 (1978-02-01), Duvall et al.
patent: 4705203 (1987-11-01), McComas et al.
patent: 4726101 (1988-02-01), Draghi et al.
patent: 5156321 (1992-10-01), Liburdi et al.
patent: 5176759 (1993-01-01), Taguchi
patent: 5229070 (1993-07-01), Melton
patent: 5328521 (1994-07-01), Keusseyan

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