Repair process

Details Repair process Repair process

2006-03-28

2006-03-28

Johnson, Jonathan (Department: 1725)

Metal fusion bonding

Process

Repairing, restoring, or renewing product for reuse

C029S889100, C420S448000

Reexamination Certificate

active

07017793

ABSTRACT:
In accordance with the present invention, a process for repairing metal workpieces, such as turbine engine components, is provided. The process comprises the steps of forming a braze paste containing a first nickel base alloy material containing boron and chromium and a second nickel base alloy material containing chromium and cobalt, applying the brazing paste to an area of the metal workpiece containing at least one crack, and subjecting the workpiece and the brazing paste to a brazing cycle by heating the brazing paste and the workpiece, preferably to a temperature in the range of from 2000 to 2200 degrees Fahrenheit. During the brazing cycle, the brazing paste flows into and fills the at least one crack and thus repairs the metal workpiece.

REFERENCES:
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patent: 4834806 (1989-05-01), Hashimoto et al.
patent: 5067234 (1991-11-01), Fraser
patent: 5330711 (1994-07-01), Snider
patent: 5437737 (1995-08-01), Draghi et al.
patent: 0353843 (1990-02-01), None
patent: 1226896 (2002-07-01), None
patent: WO 89/03740 (1989-05-01), None
patent: WO 02/50323 (2002-06-01), None

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