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通过2195铝锂合金薄板阵列微结构电流辅助辊压成形工艺研究，探索多参数交互对微结构电流辅助辊压成形缺陷的影响规律，阐明电流对辊压成形缺陷控制的作用机理。细化均匀的固溶时效组织对铝锂合金薄板微结构辊压填充高度的提升以及填充表面质量的改善作用显著。电流强度、压下量和微沟槽宽度越大，且沟槽形状越接近矩形时，辊压微结构填充高度越大，电流路径也会影响微结构填充高度。薄板辊压翘曲高度随电流强度的增大而减小，且电流强度对矩形微结构薄板翘曲的改善效果最好，三角形最差，椭圆形居中。电流强度100 A,固溶时间120 min时，微沟槽辊压填充提升效果最佳，提升率约50%,同时辊压薄板翘曲高度、阵列微结构填充高度不一致性、填充表面橘皮特征等均在电流作用下得到有效地抑制。
Abstract：Through the research on the electrically-assisted(EA) roll forming process of micro-texture on 2195 Al-Li alloy thin sheet, the influence of multi-parameter interaction on the forming defects of micro-texture with EA roll forming was explored, and the mechanism of current on the roll forming defect control was clarified. The refined and uniform solid solution aging microstructure has a significant influence on the improvement of the filling height and the filling surface quality of micro-texture on Al-Li alloy thin sheet. When the current intensity, the reduction amount and the width of the micro-groove increase, and the shape of the groove approaches rectangle, the filling height of the roll formed micro-texture becomes larger. The current path also affects the filling height of the micro-texture. The roll-formed warping height of thin sheet decreases with the increase of current intensity, which shows the best improvement for the thin sheet with rectangular grooves. The worst and the middle cases are the triangular and the oval micro-grooves, respectively. When the current intensity is 100 A and the solidification time is 120 min, the improvement of filling effect for the roll-formed micro-grooves is the best, with an improvement rate of approximately 50%. At the same time, the warping height of the thin sheet, the filling height inconsistency of the micro-texture, and the orange-like peeled features on the filling surface are all effectively suppressed under the action of current.
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基本信息:
中图分类号:TG306
引用信息:
[1]汪鑫伟,李名扬,洪秋童,等.铝锂合金薄板微结构电流辅助辊压成形工艺研究[J].塑性工程学报,2025,32(07):43-58.
基金信息:
国家自然科学基金资助项目(52375176); 黑龙江省自然科学基金资助项目(YQ2020E014); 山东省科技型中小企业提升计划(2022TSGC2215)
2025-07-23
2025-07-23
2025-07-23