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中国专利CN105666052A本发明公开了一种汽车冷凝器翅片用铝合金钎焊复合箔的制备方法,具体包括:芯层Al-Mn合金的制备;钎焊包覆层AlSi合金的制备;按Al-Si/Al-Mn/Al-Si组合进行复合轧制。通过低温热轧的工艺技术、不添加晶粒细化剂,使复合箔芯材Al-Mn合金的原始晶粒粗大化,经过轧制变形后可形成粗大长条形状的晶粒组织。由于大角度晶界的存在,可减少焊接后钎焊包覆
China Patent CN105666052A The invention discloses a preparation method of an aluminum alloy brazing composite foil used for an automobile condenser fin, which comprises the following steps: preparing a core Al-Mn alloy, preparing a brazing clad AlSi alloy, Si / Al-Mn / Al-Si combination of composite rolling. Through the low-temperature hot-rolling technology, without adding the grain refiner, the original grain of Al-Mn alloy in the composite foil core is coarsened, and the coarse and long strip shape grain structure can be formed after rolling deformation. Due to the presence of large-angle grain boundaries, brazing can be reduced after welding