| 摘要 |
<p>An aluminum alloy brazing sheet which may be used for a brazed heat exchanger has a core material formed of an aluminum alloy sheet material, an intermediate layer which is disposed on at least one side of the core material, and an aluminum alloy brazing material which is disposed on both external sides of a laminated sheet formed of the core material and the intermediate layer. This core material contains 0.5 to 1.5 wt% of Mn and the balance of Al and inevitable impurities, and the inevitable impurities are restricted to 0.6 wt% or below of Si and 0.7 wt% or below of Fe. And, the intermediate layer comprises Al and inevitable impurities such as Fe and Si, the inevitable impurities are limited to a total amount of 1.0 wt% or below, a thickness of 70 mu m or more, a grain size of 50 mu m or more, and a recrystallization temperature in brazing is lower than a melting temperature of the brazing material. Besides, the brazing material contains 7 to 15 wt% of Si and the balance of Al and inevitable impurities.</p> |
