Stock material or miscellaneous articles – All metal or with adjacent metals – Having metal particles
Patent
1994-12-28
1996-06-04
Walsh, Donald P.
Stock material or miscellaneous articles
All metal or with adjacent metals
Having metal particles
75255, 419 54, 419 8, 419 9, 419 60, 428552, 428553, 428564, B22F 704, B22F 504, B22F 100
Patent
active
055231705
ABSTRACT:
An article with a high temperature superalloy body having a directionally oriented microsuucture and a structural discontinuity, such as a crack, or surface erosion or wear portion, is repaired, to provide a repaired article, using a mixture of Ni base ahoy powders. One powder includes a careful balance of the temperature depressants Si and B. In the one powder, Si is included in the range of about 0.05-2.2 wt. % to provide about 0.02-1.3 wt. % Si in a repaired portion as bonded with the article. In that same powder, B is include in the range of about 0.2-1.2 wt. % to provide about 0.08-0.7 wt. % in that repaired portion. In the repair method, the repaired portion can be provided, when shorter brazing times are used, with improved mechanical properties by diffusing the brazed alloy and aging the repaired structure in the range of about 1600.degree.-1700.degree. F. for a time in the range of about 1-16 hours.
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Anderson Robert A.
Budinger David E.
Reeves Jim D.
General Electric Company
Greaves John N.
Hess Andrew C.
Narciso David L.
Walsh Donald P.
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