Shear deformation and plate shape control of hot-rolled aluminium alloy thick plate prepared by asymmetric rolling process  

异步热轧铝合金厚板的剪切变形和板形控制(英文)

作　　者：左玉波[1] 付兴[1] 崔建忠[1] 汤翔宇[1] 毛路[1] 李磊[1] 朱庆丰[1] 

机构地区：[1]东北大学材料电磁过程研究教育部重点实验室,沈阳110819

出　　处：《Transactions of Nonferrous Metals Society of China》2014年第7期2220-2225,共6页中国有色金属学报（英文版）

基　　金：Projects(51104043,51374067)supported by the National Natural Science Foundation of China;Project(2012CB619506)supported by the National Basic Research Program of China;Project(N120409002)supported by the Fundamental Research Funds for the Central Universities,China

摘　　要：Asymmetric rolling （ASR）, as one of severe plastic deformation （SPD） methods to make ultra-fine materials with enhanced performance is mainly used to prepare foil and thin strip. The asymmetrical rolling was achieved by adjusting the diameters of the upper roll and the bottom roll and was used to prepare hot-rolled thick plate of 5182 aluminium alloy. The shear deformation and plate shape control were experimentally studied. The experimental results show that asymmetrical rolling has a significant effect on metal deformation stream and can somehow refine microstructure and improve the uniformity of microstructure and properties. The asymmetrical rolling process can also reduce the rolling force. However, bending of rolling plate often happens during asymmetrical rolling process. The factors affecting the bending were discussed.异步轧制技术作为一种制备高性能超细晶材料的剧烈塑性变形方法主要应用于箔材和带材的生产。通过调整轧机上下辊的辊径实现异步轧制,采用该技术制备5182铝合金热轧厚板,并研究剪切变形和板形控制。结果表明:异步轧制对金属塑性流动具有重要影响,并在一定程度上细化微观组织,提高组织、性能的均匀性,异步轧制也可以降低轧制力。在异步轧制过程中经常出现轧板弯曲现象,同时探讨了影响轧板弯曲的因素。

关 键 词：asymmetric rolling shearing deformation 5182 aluminium alloy plate shape microstructure mechanical properties 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG339[金属学及工艺—金属材料]