铜铝异步轧制复合工艺及组织性能

Process,microstructure and property of asymmetric rolled Cu/Al composites

采用异步轧制工艺进行了铜铝薄带的复合,并对复合带进行了退火处理,利用金相显微镜、扫描电镜和拉伸试验机进行了复合带组织的观察和性能的测定.结果表明,异步轧制相比同步轧制的界面波浪状形貌明显减少,界面更加平整;在相同的压下率下,异步轧制的轧制力要小于同步轧制的轧制力,使轧制的稳定性和精度得到了提高,有益于提高界面剥离强度;异步速比与复合带界面的剥离强度呈抛物线关系,异速比为1.25界面的剥离强度最大;异步速比增加,铜/铝复合带Cu/Al厚度比增加.所得结果在铜铝薄带轧制复合领域的研究有重要意义.

Copper/aluminium laminated composites were produced by asymmetric rolling,which were annealed subsequently. Their microstructure and properties were investigated by optical microscope( OM),scanning electron microscope( SEM)and tensile testing machine,respectively. The results revealed that wavy morphology of interface was reduced significantly and became more smooth compared with synchronous roll bonding.Under the same reduction ratio,the rolling force is less than the symmetrical rolling,which improves the stability and accuracy of the rolling process and benefits the peeling strength. Also,asymmetric speed ratio and peeling strength of the composite show parabola relationship. When the speed ratio is 1. 25,the peeling strength reaches its maximum. When asynchronous ratio increases,the thickness ratio of Cu to Al rises. The results have significance in the fabrication of copper/aluminium clad composite.