Hybrid braze alloy
AssigneeUnited Technologies Corporation
InventorsEugene J. DelGrosso, Michael R. Coles
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Abstract
A hybrid braze alloy is disclosed that includes an aluminum alloy and a magnesium alloy mixed together. In use of the hybrid braze alloy, the ratio by weight of aluminum alloy to magnesium alloy making up the mixture may be altered within a working braze ratio range of about forty nine to one (49/1) to about four point eight to one (4.8/1), so that the braze melting temperature of the hybrid braze alloy is a function of the ratio. By altering the ratio of the alloys within the working braze ratio range, a braze melting temperature may be achieved that is most appropriate for brazing a specific component to a specific apparatus.
Claims8
A hybrid braze alloy for fluxless brazing of metals comprising:
- a. an aluminum alloy that consists essentially of, by weight:
- ______________________________________ 9.3% to 13% Silicon 0.3% to 4.7% Copper 0.0% to 0.8% Iron 0.2% to 10.5% Zinc 0.1% to 1.5% Magnesium, and The Balance Aluminum, ______________________________________
- b. a magnesium alloy that consists essentially of, by weight:
- ______________________________________ 5.3% to 9.7% Aluminum 0.35% to 3.5% Zinc 0.13% to 0.35% Manganese 0.3% to 0.5% Silicon 0.0% to 0.1% Copper 0.01% to 0.03% Nickel, and The Balance Magnesium, ______________________________________
- wherein the aluminum alloy and the magnesium alloy are mixed to form a mixture so that relative proportions of the aluminum alloy by weight and magnesium alloy by weight are within a working braze ratio range that includes from forty nine parts of the aluminum alloy to one part of the magnesium alloy (49/1) to four point eight parts of the aluminum alloy to one part of the magnesium alloy (4.8/1).
A method of preparing a hybrid braze alloy for fluxless brazing of metals that provides a range of braze melting temperatures comprising the steps of:
- a. providing an aluminum alloy consisting essentially of, by weight;
- ______________________________________ 9.3% to 13% Silicon 0.3% to 4.7% Copper 0.0% to 0.8% Iron 0.2% to 10.5% Zinc 0.1% to 1.5% Magnesium, and The Balance Aluminum;
- ______________________________________
- b. providing a magnesium alloy consisting essentially of, by weight;
- ______________________________________ 5.3% to 9.7% Aluminum 0.35% to 3.5% Zinc 0.13% to 0.35% Manganese 0.3% to 0.5% Silicon 0.0% to 0.1% Copper 0.01% to 0.03% Nickel, and The Balance Magnesium;
- ______________________________________
- c. mixing an amount of the magnesium alloy with the aluminum alloy to produce a mixture so that the relative proportions of the aluminum alloy by weight and magnesium alloy by weight are within a working braze ratio range that includes from forty nine parts of the aluminum alloy to one part of the magnesium alloy (49/1) to four point eight parts of the aluminum alloy to one part of the magnesium alloy (4.8/1), wherein the braze melting temperature is a function of the amount of magnesium alloy in the mixture.
Dependencies are inferred from the claim text.