| 摘要 |
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-L<SUB>Si</SUB>-L<SUB>Zn</SUB>>=40(mum) (1)<?in-line-formulae description="In-line Formulae" end="tail"?> <?in-line-formulae description="In-line Formulae" end="lead"?>L-L<SUB>Si</SUB>-L<SUB>Mg</SUB>>=5(mum) (2)<?in-line-formulae description="In-line Formulae" end="tail"?> wherein L is a tube wall thickness (mum); L<SUB>Si </SUB>is a position (mum) indicating an amount of Si diffused from the filler material; and L<SUB>Zn </SUB>and L<SUB>Mg </SUB>each represent a region (mum) indicating an amount of Zn or Mg diffused from the sacrificial material, respectively; and a method of producing the heat exchanger.
|
