(中南工业大学材料系，长沙 410083;
东北轻合金加工厂， 哈尔滨 150 060)
摘 要: 三层复合铝合金带材是以铝锰系合金为芯材、 双面包覆铝硅系钎料合金的多层复合材 料， 是制造管带钎焊式热交换器的重要材料之一，在实际钎焊过程中对钎料层的包覆率有严格要求。分析了影响三层复合铝合金带材热轧复合时包覆率的变化因素， 结合生产工艺要求， 提出了热轧复合包覆率的数学模型，为实际生产中包覆率的控制提供了依据。
关键字: 包覆率 热轧复合 铝合金
（Department of Material Science and Engineering,
Central South University of Technology, Changsha 410083, P. R. China
Northeastern Light Alloy Fabrication Plant, Harbin 150060, P. R. China）
Abstract:The sandwich aluminum alloy sheet is an important material for heat exchangers of automobile. The sheet comprises a core of Al-Mn alloy and clads of Al-Si alloy on both sides. In order to obtain a good brazeability the clad ratio of about 10% is needed, below or above this value may result in unqualified products. The effect of properties of the alloy and rolling parameters on the clad ratio was analyzed, and a model to calculate the clad ratio after hot rolling was put forward. According to this model, the clad ratio can be monitored in the production process.
Key words: clad ratio hot roll bonding aluminum alloy
