Process for fabricating homogeneous, ductile brazing foils and p

Details Process for fabricating homogeneous, ductile brazing foils and p Process for fabricating homogeneous, ductile brazing foils and p

1978-11-13

1981-08-11

Dean, R.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75171, C22C 1903

Patent

active

042832250

ABSTRACT:
Brazing of metal parts employing a homogeneous, ductile, filler metal foil is disclosed. The brazing foil, useful for brazing stainless steels, has a composition consisting essentially of 0 to about 4 atom percent iron, 0 to about 21 atom percent chromium, 0 to about 16 atom percent boron, 0 to about 19 atom percent silicon, 0 to about 22 atom percent phosphorus and the balance nickel and incidental impurities. In addition to containing the foregoing elements within the above-noted composition ranges, the composition must be such that the total of iron, chromium and nickel ranges from about 76 to 84 atom percent and the total of boron, silicon and phosphorus ranges from about 16 to 24 atom percent. The ductile foil permits fabrication of preforms of complex shapes which do not require binders and/or fluxes necessary for brazing powders presently used to braze stainless steels and nickel base alloys.

REFERENCES:
patent: 3297436 (1967-01-01), Duwez
patent: 3856513 (1974-12-01), Chen et al.
patent: 3871836 (1975-03-01), Polk et al.
patent: 4069045 (1978-01-01), Lundgren
"Splat Quenching of Iron-Nickel-Boron Alloys", Ruhl, et al., Trans. Met. Soc. Aime, vol. 245, Feb. 1969, pp. 253-257.
Semi-Alloys Publication, Tech. Bull., No. BA-65, 1968.

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