High temperature braze repair of superalloys

Details High temperature braze repair of superalloys High temperature braze repair of superalloys

1979-07-31

1981-08-25

McGlynn, Joseph H.

Metal fusion bonding

Process

Repairing, restoring, or renewing product for reuse

2940207, 2940218, 228194, 228238, B23P 604, B23K 104

Patent

active

042854598

ABSTRACT:
Cracks in superalloys are braze repaired after notching or cutting away material adjacent the cracks, filling the recess with a braze component containing a melting point depressant and subjecting the repair area to a first elevated temperature to form a melt. The melting point of the repair region is raised by diffusing the depressant into the braze material and repair region at second and third elevated temperatures lower than the first elevated temperature to form a repaired superalloy exhibiting highly desirable properties.

REFERENCES:
patent: 3632319 (1972-01-01), Hoppin et al.
patent: 3759692 (1973-09-01), Zelahy
patent: 4004047 (1977-01-01), Grisik
patent: 4008844 (1977-02-01), Duvall et al.
patent: 4028787 (1977-06-01), Cretella et al.
patent: 4098450 (1978-07-01), Keller et al.

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