东北大学学报(自然科学版)排版模板.docVIP

___________________________ 收稿日期：2007-05-24 基金项目：国家自然科学基金资助项目，辽宁省博士启动基金资助项目。 作者简介：祖国胤(1977-),男,黑龙江齐齐哈尔人,东北大学讲师,博士; 于九明(1944-),男,河北滦县人,东北大学教授. 冷轧复合对铝合金复合箔组织与性能的影响 祖国胤，李 兵，李 鸿，于九明 （东北大学 材料与冶金学院，辽宁 沈阳 110819） 摘 要：研究了采用冷轧复合法生产汽车散热器用铝合金复合箔的工艺，主要研究了冷轧首道次压下率、包覆层厚度及成品前退火制度对复合箔组织与性能的影响。结果表明：皮材A4045和芯材A3003在30%~50%的首道次压下率下可以实现良好的初结合，冷轧工艺生产的复合箔上、下包覆层的厚度基本一致。最后一道次的精轧压下率在25%~35%左右时，复合箔成品的抗下垂性能最佳。复合箔成品前的退火温度应控制在320~400℃，退火温度为400℃时，退火时间以不超过80min为宜。 关键词：冷轧复合；复合箔；压下率；抗下垂性；退火 中图分类号：请查阅中图分类号 文献标志码：A Effect of Cold-Rolling Cladding on Microstructure and Properties of Composite Aluminum Alloy Foil ZU Guo-yin, LI Bing, LI Hong, YU Jiu-ming (School of Materials Metallurgy, Northeastern University, Shenyang 110819, China. Corresponding author: ZU Guo-yin, E-mail: zugy@smm.neu.edu.cn) Abstract：The cold-rolling cladding process of composite aluminum alloy foil for automobile heat exchanger was investigated, as well as the effects of percentage reduction of first pass, clad sheet thickness and final annealing schedule on the microstructure and properties of the foil. The results showed that bonding the clad sheets A4045 to the core material A3003 on both sides succeeds initially when the percentage reduction is 30%~50% of first pass during cold rolling, and the thickness of both the clad sheets of the composite foil are basically the same. The best sagging resistance is available when the percentage reduction of final pass is 25%~35%. The annealing temperature should be controlled in the range from 320 to 400℃ before finish rolling, and the annealing time should control within 80 minutes when annealed at 400℃. Key words：cold-rolling cladding; composite foil; percentage reduction; sagging resistance; annealing 世界汽车工业的发展方向为轻量化[1]，其中，铝及铝合金以比强度高、耐腐蚀性佳、热稳定性好、易成型和简化结构等特点成为了最理想的汽车轻量化材料[2-4]。在汽车的诸多部件中，散热器的铝化是各国学者研究的热点[5]。Al-Si/Al-Mn/Al-Si三层复合箔是汽车铝散热器的关键材料，这种复合箔现多采用热轧复合法制备，存在生产效率及成材率低，产品质量不稳定等缺点。相比之下，冷轧复合工艺生产效率高、产品性能稳定，非常适合高精度多层金属复合轧制。目前，日本、美国等国家已经主要采用冷轧复合法生产汽车铝散热器用复合箔[6]，有效