Nickel base brazing alloy and method

Details Nickel base brazing alloy and method Nickel base brazing alloy and method

1984-06-04

1987-12-15

Dean, R.

Alloys or metallic compositions

Nickel base

Chromium containing

22826313, C22C 1905

Patent

active

047132175

ABSTRACT:
A nickel base brazing alloy, particularly suitable for diffusion brazing of superalloys, including gamma prime nickel base superalloys. The improved brazing alloy consists essentially of the following in weight percent: 12 to 14% chromium, 1 to 3.5% boron, 1.5 to 5% iron, less than 0.06% carbon, and the balance nickel. The brazing alloy and method of this invention is able to fill gaps in the brazed joint up to 0.02 inches, without adversely affecting the joint microstructure. The resultant microstructure of the brazed joint exhibits minorsecondary phase of ultrafine spherical secondary precipitates, in a predominant solid solution matrix resulting in improved ductility, high temperature oxidation and sulfidation resistance and elimination of the requirement for pressure brazing fixtures.

REFERENCES:
patent: 2714760 (1955-08-01), Boam et al.

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