Recovered high strength multi-layer aluminum brazing sheet products
AssigneeAlcoa Inc.
InventorRaymond Kilmer
Life of this patent
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Abstract
A metallurgical product consists essentially of a core aluminum alloy, purposefully tailored through chemistry and processing route to resist recrystallization during the brazing cycle to intentionally exploit the higher strengths immediately after brazing of a deformed and recovered microstructure, the core aluminum alloy being bonded on one side to an aluminum alloy interliner designed to be resistant to localized erosion, which, in turn, is bonded to a 4xxx calling alloy.
Claims53
A metallurgical product consisting essentially of a core aluminum alloy, purposefully tailored through chemistry and processing route to resist recrystallization during the brazing cycle to intentionally exploit the higher strengths immediately after brazing of a deformed and recovered microstructure, bonded on one side to an aluminum alloy interliner designed to be resistant to localized erosion, which, in turn, is bonded to a 4xxx cladding alloy.
A metallurgical product of claim 33, wherein the 4xxx braze cladding has Si concentration between about 6 and about 13 wt-%, Fe concentration of less than about 0.4 wt-%, Mn concentration below about 0.3 wt-%, Cu concentration below about 0.2 wt-%, Zn concentration below about 0.1 wt-%, and Mg concentration below about 0.05 wt-%.
Dependencies are inferred from the claim text.