Corrosion resistant aluminum core alloy
AssigneeKaiser Aluminum & Chemical Corporation
InventorWalter D. Finnegan
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Abstract
A novel aluminum alloy contains vanadium as an alloying element, at a concentration ranging from about 0.02% to about 0.4% by weight. The vanadium imparts corrosion resistance to the alloy, particularly when the alloy is used as a core alloy in a vacuum brazing sheet. A further improvement in corrosion resistance is achieved by processing the alloy or brazing sheet in such a manner that the final processing step is a cold work to a reduction of about 10% to about 20%.
Claims20
A brazing material comprising (a) an aluminum-base core alloy of the Aluminum Association 1XXX series containing vanadium as an alloying element and (b) a cladding comprising an aluminum-base brazing alloy.
A brazing material comprising (a) an aluminum-base core alloy selected from the group consisting of alloys of the Aluminum Association 3XXX and 5XXX series containing vanadium as an alloying element, and (b) a cladding comprising an aluminum-base brazing alloy.
A brazing material comprising (a) an aluminum-base core alloy of the Aluminum Association 3XXX series containing vandium as an alloying element, and (b) a cladding comprising an aluminum-base brazing alloy.
A brazing material comprising (a) an aluminum-base core alloy containing vanadium as an alloying element, and (b) a cladding comprising an aluminum-base brazing alloy of the Aluminum Association 4XXX series.
A brazing material comprising (a) an aluminum-base core alloy of the Aluminum Association 3XXX series further containing from about 0.02% to about 0.4% by weight vanadium, and (b) a cladding comprising an aluminum-base brazing alloy containing from about 5% to about 15% silicon by weight.
A brazing material formed by:
- (a) cladding an aluminum-base core alloy containing vanadium as an alloying element with an aluminum-base brazing alloy to produce a clad product;
- (b) rolling said clad product to form a sheet product;
- (c) annealing said sheet product to a substantially strain-free state;
- and
- (d) cold working said annealed sheet product to a reduction of from about 10% to about 20%.
A method of producing a brazing material, comprising:
- (a) cladding an aluminum-base core alloy containing vanadium as an alloying element with an aluminum-base brazing alloy to produce a clad product;
- (b) rolling said clad product to form a sheet product;
- (c) annealing said sheet product to a substantially strain-free state;
- and
- (d) cold working said annealed sheet product to a reduction of from about 10% to about 20%.
A method of producing a brazing material, comprising:
- (a) cladding an aluminum-base core alloy containing from about 0.02% to about 0.4% vanadium by weight with an aluminum-base brazing alloy containing from about 5% to about 15% silicon by weight to form a clad product;
- (b) rolling said clad product to form a sheet product;
- (c) annealing said sheet product to a substantially strain-free state;
- and
- (d) cold working said annealed sheet product to a reduction of from about 10% to about 20%.
Dependencies are inferred from the claim text.