(中南工業(yè)大學(xué)材料系，長沙 410083;
東北輕合金加工廠， 哈爾濱 150 060)
摘 要: 三層復(fù)合鋁合金帶材是以鋁錳系合金為芯材、 雙面包覆鋁硅系釬料合金的多層復(fù)合材 料， 是制造管帶釬焊式熱交換器的重要材料之一，在實(shí)際釬焊過程中對(duì)釬料層的包覆率有嚴(yán)格要求。分析了影響三層復(fù)合鋁合金帶材熱軋復(fù)合時(shí)包覆率的變化因素， 結(jié)合生產(chǎn)工藝要求， 提出了熱軋復(fù)合包覆率的數(shù)學(xué)模型，為實(shí)際生產(chǎn)中包覆率的控制提供了依據(jù)。
關(guān)鍵字: 包覆率 熱軋復(fù)合 鋁合金
（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
