异步轧制对高压电解电容器用铝箔织构的影响

Effects of Cross Shear Rolling on Texture of Aluminum Foil for High Voltage Electrolytic Capacitor

利用异步轧制技术对高压电解电容器用高纯铝进行冷轧,研究了异步轧制参数对铝箔冷轧织构的影响.结果表明:异步轧制的搓轧区效应,可使铝箔形成不同于同步轧制的6种主要织构的含量与分布.慢辊侧的织构总体含量高于快辊侧总体含量;S{123}〈634〉织构、C{112}〈111〉织构的变化趋势相同,立方织构{001}〈100〉、旋转立方织构{001}〈110〉的变化趋势相同;Goss织构含量较低,且对快慢辊、形变量、速比都不敏感.织构的体积分数对速比敏感,同时调整速比与终道次形变量,可提高冷轧织构的含量.结合实际要求形变量,速比控制在1.06和1.13,可获得含量高于同步轧制的冷轧织构.

High-purity aluminum foils were obtained by cross shear cold rolling with different parameters,and the effects of rolling parameters on the as-rolled textures in aluminum foils were investigated.Compared with the symmetrically rolled aluminum foils,six kinds of textures were found in cross shear rolled foils whose volume fraction and distribution are different from the former because of the effect of cross shear area.On the whole,the content of textures formed on the slow roller side is higher than that on the fast roller side.Both the S{123}〈634〉 and C{112}〈111〉 textures have the same evolution trends,as well as both the {001}〈100〉 cube texture and the {001}〈110〉 rotated cube texture.The content of Goss texture is lower and insensitive to either the fast or slow roller,the reduction and the speed ratio,while the volume fraction of texture is sensitive to the speed ratio and the content of cold rolled texture can be increased through adjusting the speed ratio and reduction on the final pass.It was found that the content of cold-rolled textures which is higher than that by symmetric rolling can be obtained if the speed ratio is 1.06 or 1.13.