汽车用6111铝合金板材成形性和烤漆性研究  

Study on the Formability and Paintability of 6111 Aluminum Alloy Sheet for Automobile

作　　者：韩如意 董刘颖 冯哲 白云鹏 满瑞平 刘迪 石玲 韩瑞航 唐强 HAN Ruyi;DONG Liuying;FENG Zhe;BAI Yunpeng;MAN Ruiping;LIU Di;SHI Ling;HAN Ruihang;TANG Qiang(Liaoning Zhongwang Group Co.,Ltd.,Liaoyang 111003,Liaoning,China)

机构地区：[1]辽宁忠旺集团有限公司,辽宁辽阳111003

出　　处：《热处理技术与装备》2024年第2期26-29,33,共5页Heat Treatment Technology and Equipment

摘　　要：通过对6111铝合金坯料沿与轧制方向分别呈0°、45°和90°取样进行力学性能测试,采用模拟软件进行成形极限曲线模拟,对比不同预时效与预应变下板材的成形性和烤漆硬化性。结果表明6111铝合金板材具有各向异性,T4和T4P5态下与轧制方向呈0°时强度、应变硬化指数n值及塑性应变比r值均最高;T4P5态下板材成形性最好,其强度最低,延伸率、n值、r值、△r和成型极限值最大,屈强比最小。6111铝合金板材具有良好的烤漆硬化性能,与T4P5态相比其屈服强度提高了97 MPa,2%塑性预应变处理后板材烤漆硬化性能再提高22 MPa。The mechanical properties of 6111 aluminum alloy billets were tested by taking samples along the rolling direction at 0°,45°and 90°,respectively,and the fitted forming limit curve was carried out by simulation software.The formability and paint hardening of sheet were compared under different pre-aging and pre-strain conditions.The results showed that the 6111 aluminum alloy sheet had anisotropy,and the strength,strain hardening index n value and plastic strain ratio r value were the highest in the T4 and T4P5 states with the rolling direction at 0°.In the T4P5 state,the sheet had the best formability,with the lowest strength,the largest elongation,n value,r value,△r and forming limit value,the smallest yield ratio.The 6111 aluminum alloy sheet had good paint hardening performance,with the yield strength increased of 97 MPa compared to T4P5 state.After 2%plastic pre-strain treatment,the paint hardening performance of the sheet was further increased by 22 MPa.

关 键 词：6111铝合金 成型极限 成形性 烤漆硬化性 

分 类 号：TG166[金属学及工艺—热处理]