Flux and process for brazing aluminum material
AssigneeFusion, LLC
InventorGary W. George
Life of this patent
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Abstract
The instant flux and paste containing same are for brazing aluminum material. The flux consists essentially of a particulate blend of aluminum fluoride, potassium fluoride, and cesium chloride, or rubidium chloride or a mixture of cesium chloride and rubidium chloride, the fluorides being complexed with each other or not complexed or being a mixture of the complexed and not complexed fluorides. Lithium fluoride, preferably complexed with the other fluorides, is an optional ingredient. The weight fraction of the total fluorides is between about 1/10 and about 9/10, and the A1F.sub.3 -KF weight ratio is between about 4:1 to about 0.4:1.
Claims37
A flux for brazing the metal surfaces of an aluminum material, the flux consisting essentially of a particulate blend of aluminum fluoride, potassium fluoride, and the chloride of at least one Group 1A metal having an atomic number of either 37 or 55, the weight fraction of the total fluorides being between about 3/10 and about 9/10, the weight ratio of the aluminum fluoride to the potassium fluoride being between 4:1 and 0.4:1.
A flux for coating or joining by brazing surfaces of an aluminum material, the flux consisting essentially of about 1-10% of lithium fluoride and a particulate blend of aluminum fluoride, potassium fluoride, and a chloride selected from the group consisting of cesium chloride, rubidium chloride, and a mixture of cesium and rubidium chlorides, the weight fraction of the total fluorides in said blend being between about 3/10 and about 9/10, the weight ratio of the aluminum fluoride to potassium fluoride in said blend being between 4:1 and 0.4:1.
A flux for brazing the metal surfaces of an aluminum material, the flux consisting essentially of a particulate blend of aluminum fluoride, potassium fluoride, a chloride selected from the group consisting of cesium chloride, rubidium chloride and mixtures of same, zero to about 10% by weight lithium fluoride, the weight fraction of the aluminum fluoride plus potassium fluoride being between about 1/10 and about 9/10, the weight ratio of the aluminum fluoride to the potassium fluoride being between about 4:1 and about 0.4:1.
A flux for brazing the metal surfaces of an aluminum material, the flux consisting essentially of a particulate blend of aluminum fluoride, potassium fluoride, a chloride selected from the group consisting of cesium chloride, rubidium chloride and mixtures of same, zero to about 10% by weight of lithium fluoride, and the weight fraction of the aluminum fluoride plus potassium fluoride being between about 7/20 and about 7/10, the weight ratio of the aluminum fluoride to the potassium fluoride being between about 3:1 and about 0.5:1.
A flux for brazing the metal surfaces of an aluminum material, the flux consisting essentially of a particulate blend of aluminum fluoride, potassium fluoride, and cesium chloride, zero to about 10% by weight of lithium fluoride, and the weight fraction of the aluminum fluoride plus potassium fluoride being about 4/10, the weight ratio of the aluminum fluoride to the potassium fluoride being about 0.8:1.
A flux for brazing the metal surfaces of an aluminum material, flux consisting essentially of a particulate blend of aluminum fluoride, potassium fluoride, and rubidium chloride, zero to about 10% by weight of lithium fluoride, and the weight fraction of the aluminum fluoride plus potassium fluoride being about 7/10, the weight ratio of the aluminum fluoride to potassium fluoride being about 1.2:1.
Dependencies are inferred from the claim text.