5182铝合金板材成形性能研究  

Study on formability of 5182 aluminum alloy sheet

作　　者：韩俊超 董晓传[1] 曲周德[1] 周正[2] 李超[3] HAN Jun-chao;DONG Xiao-chuan;QU Zhou-de;ZHOU Zheng;LI Chao(National-Local Joint Engineering Laboratory of Intelligent Manufacturing Oriented Automobile Die&Mould,Tianjin University of Technology and Education,Tianjin 300222,China;Tianjin Tianduan Press Co.,Ltd.,Tianjin 300142,China;Tianjin Motor Dies Company Limited,Tianjin 300308,China)

机构地区：[1]天津职业技术师范大学汽车模具智能制造技术国家地方联合工程实验室,天津300222 [2]天津市天锻压力机有限公司,天津300142 [3]天津汽车模具股份有限公司,天津300308

出　　处：《塑性工程学报》2020年第2期87-93,共7页Journal of Plasticity Engineering

基　　金：天津市教委科研计划项目(2017KJ101);天津市智能制造专项。

摘　　要：在室温条件下,依次按0°、45°和90°的轧制方向和0. 01、0. 1和1 s^-1的应变速率对5182铝合金标准试样进行单向拉伸实验,研究了5182铝合金室温下的成形性能。结果表明,5182铝合金的力学性能受应变速率及轧制方向的影响。同一应变速率下,其抗拉强度和伸长率在轧制方向为0°时最高,屈服强度在90°时最高,但各方向区别不明显;同一轧制方向上,随着应变速率的增大,其抗拉强度及伸长率呈下降趋势,屈服强度呈上升趋势;基于5182铝合金的单向拉伸实验,建立了Fields-Backofen本构方程,此外通过杯突实验,获取了5182铝合金的成形极限曲线,从而为5182铝合金室温冲压成形极限的预测及数值模拟提供理论支持。利用Dynaform模拟某车型汽车前盖内板冲压成形,证明本构方程和成形极限曲线的精度满足工程要求。Unidirectional tensile tests of 5182 aluminium alloy standard specimens were carried out at room temperature in accordance with the rolling directions of 0°,45° and 90°and strain rates of 0. 01,0. 1 and 1 s-1,respectively. The formability of 5182 aluminium alloy at room temperature was studied. The results show that the mechanical properties of 5182 aluminum alloy are affected by strain rate and rolling direction. At the same strain rate,the tensile strength and elongation are the highest when the rolling direction is 0° and the yield strength is the highest when the rolling direction is 90°,but there is no obvious difference in all directions. In the same rolling direction,with the increase of strain rate,the tensile strength and elongation decrease,while the yield strength increases. Fields-Backofen constitutive equation was established on the basis of unidirectional tensile tests of 5182 aluminium alloy. In addition,the forming limit curve of 5182 aluminum alloy was obtained by cupping test,which provided theoretical support for prediction and numerical simulation of stamping forming limit at room temperature of 5182 aluminum alloy. Dynaform was used to simulate the stamping process of the front cover inner plate of a car. It is proved that the accuracy of the constitutive equation and the forming limit curve meets the engineering requirements.

关 键 词：5182铝合金 单向拉伸 本构模型 杯突实验 

分 类 号：TG311[金属学及工艺—金属压力加工]