中间退火前的冷轧变形量对6A16铝合金组织与性能的影响  

Effect of cold rolling deformation before intermediate annealing on microstructure and properties of 6A16 aluminum alloy

作　　者：闫丽珍 张永安[1,2,3] 熊柏青 李锡武[1,2,3] 李志辉 陈凯欣[1,2,3] YAN Li-zhen;ZHANG Yong-an;XIONG Bai-qing;LI Xi-wu;LI Zhi-hui;CHEN Kai-xin(State Key Laboratory of Nonferrous Metals and Processes,GRINM Group Co.,Ltd.,Beijing 100088,China;GRIMAT Engineering Institute Co.,Ltd.,Beijing 101407,China;General Research Institute for Nonferrous Metals,Beijing 100088,China)

机构地区：[1]有研科技集团有限公司有色金属材料制备加工国家重点实验室,北京100088 [2]有研工程技术研究院有限公司,北京101407 [3]北京有色金属研究总院,北京100088

出　　处：《材料工程》2020年第12期103-110,共8页Journal of Materials Engineering

基　　金：国家重点研发计划资助项目(2016YFB0300802)。

摘　　要：通过EBSD和力学性能测试等手段研究中间退火前不同的冷轧变形量对6A16铝合金板材后续加工过程中组织和成形性能的影响规律。结果表明:随中间退火前冷变形量的增加,退火后的晶粒尺寸减小,完全再结晶比例增大,冷轧后板材具有明显变形态组织的特征,晶粒尺寸逐渐增大。冷轧态板材经过T4P处理后,晶粒尺寸随中间退火前冷变形量的增加而逐渐增大,加工硬化指数n 10%~20%值无变化,而塑性应变比r 10%值呈增加的趋势,说明当中间退火前冷轧变形量为66.67%时,板材的成形性能最好。Effect of different cold rolling deformations before intermediate annealing on the microstructure and forming properties of 6A16 aluminum alloy sheet during subsequent processing was investigated by means of EBSD and mechanical properties tests.The results show that with the increase of cold deformation before intermediate annealing,the size of the grains after annealing decreases,the proportion of complete recrystallization increases,and the sheet possesses a typical deformed structure after cold rolling,and the grain size increases gradually.After T4P treatment,with the increase of the cold deformation before the intermediate annealing,the grain size of the cold-rolled sheet increases,the work hardening exponent n 10%-20%value does not change and the plastic strain ratio r 10%value increases.It shows that,the forming ability of the sheet is the best when the cold rolling deformation before annealing is 66.67%.

关 键 词：中间退火 铝合金 显微组织 成形性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程]