Aluminum alloy heat exchanger and method of producing the same

Details Aluminum alloy heat exchanger and method of producing the same Aluminum alloy heat exchanger and method of producing the same

2007-07-24

2007-07-24

Zimmerman, John J. (Department: 1775)

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

C428S933000, C165S180000, C165S905000, C148S535000, C228S183000, C228S262510

Reexamination Certificate

active

10999232

ABSTRACT:
An aluminum alloy heat exchanger having a tube composed of a thin aluminum alloy clad material, wherein, in the clad material, one face of an aluminum alloy core material containing Si 0.05–1.0 mass % is clad with an Al—Si-series filler material containing Si 5–20 mass %, and the other face is clad with a sacrificial material containing Zn 2–10 mass % and/or Mg 1–5 mass %, and wherein an element diffusion profile of the clad material by EPMA satisfies (1) and/or (2):in-line-formulae description="In-line Formulae" end="lead"?L-LSi-LZn≧40(μm)   (1)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?L-LSi-LMg≧5(μm)   (2)in-line-formulae description="In-line Formulae" end="tail"?wherein L is a tube wall thickness (μm); LSiis a position (μm) indicating an amount of Si diffused from the filler material; and LZnand LMgeach represent a region (μm) indicating an amount of Zn or Mg diffused from the sacrificial material, respectively; and a method of producing the heat exchanger.

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