Brazing titanium to stainless steel using nickel filler...

Details Brazing titanium to stainless steel using nickel filler... Brazing titanium to stainless steel using nickel filler...

2007-02-20

2007-02-20

Edmondson, Lynne R. (Department: 1725)

Metal fusion bonding

Process

Metal to nonmetal with separate metallic filler

C228S101000

Reexamination Certificate

active

11357280

ABSTRACT:
A method of braze bonding a stainless steel part to a titanium part by heating a component assembly comprised of the titanium part, the stainless steel part, and a very thin substantially pure nickel foil filler material placed between the two parts and heated at a temperature that is greater than the temperature of the eutectic formed between the titanium part and the substantially pure nickel filler material, but that is less than the melting point of either the filler material, the stainless steel part, or the titanium part. The component assembly is held in intimate contact at temperature in a non-reactive atmosphere for a sufficient time to develop a hermetic and strong bond between the stainless steel part and the titanium part. The bonded component assembly is optionally treated with acid to remove any residual free nickel and nickel salts, to assure a biocompatible component assembly for implantation in living tissue.

REFERENCES:
patent: 5190831 (1993-03-01), Banker
patent: 5314106 (1994-05-01), Ambroziak et al.
patent: 6875949 (2005-04-01), Hall
patent: 2006/0113357 (2006-06-01), Jiang et al.

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