Self-brazing materials for elevated temperature applications
AssigneeEngineered Materials Solutions, Inc.
InventorsGardner S. Haynes, Bijendra Jha, Chen-Chung S. Chang
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Abstract
This invention describes the roll bonding of Al and Ni-bearing Cu alloys to suitable substrates to produce self-brazing materials for the elevated temperature, aggressive environment application. The Al and Ni-bearing Cu alloy for the self-brazing layers can be obtained by cladding layers of elemental Ni and Al to Cu. The Al content in the self-brazing layers can be varied from 2 to 100%. The Ni content in the self-brazing Cu alloy can be varied from 10 to 100%. Additional alloying elements in the commercial Cu alloys such as Fe, Cr, Si, Mn, Sn and Zn are unavoidable. Trace elements in the commercial alloys such as Pb, Ag and As will also affect the brazing and shall be reduced.
Claims31
A method comprising the steps of making a clad self-brazing alloy by providing a base metal alloy, providing a cladding consisting essentially of copper and aluminum, and pressing said cladding to said base metal alloy to bond said cladding to and form a brazing layer on said base metal alloy, said base metal ahoy having a melting point higher than said cladding, and brazing said self-brazing alloy to a metal surface at elevated temperature.
A method comprising the steps of making a clad self-brazing alloy by providing a base metal alloy, providing a cladding consisting essentially of copper and nickel, and pressing said cladding to said base metal alloy to bond said cladding to and form a brazing layer on said base metal alloy, said base metal alloy having a melting point higher than said cladding, and brazing said self-brazing allay to a metal surface at elevated temperature.
Dependencies are inferred from the claim text.