摘要
通过扫描电镜、透射电镜等手段研究了汽车外板用6016铝合金生产过程中微观结构的演变规律和中间退火工艺对综合性能的影响。结果表明,连续退火比箱式退火具备更强的晶粒细化作用;中间退火前冷轧压下量对结晶相破碎效果显著,结晶相尺寸从4.38μm降至3.20μm左右,降低了约27%;中间退火处理弱化了T4P态板材中的不均匀屈服延伸。箱式退火的慢升温速率和长时间中温保温导致Mg_(2)Si相沿晶析出并粗化。
Microstructure evolution in production process and effect of intermediate annealing on comprehensive performance of the 6016 aluminum alloy for automobile body sheet were studied by using scanning electron microscope and transmission electron microscope.The results show that continuous annealing has stronger grain refinement effect than furnace annealing.The reduction amount of cold rolling before intermediate annealing has a remarkable effect on fragmentization of the crystalline phases,decreasing the size from 4.38μm to~3.2μm,i.e.,reduced by~27%,and the intermediate annealing treatment can weaken uneven yield elongation of the T4P automobile body sheet.Whereas the slow heating rate of furnace annealing and long holding time at medium temperature lead to grain boundary precipitation and coarsening of Mg_(2)Si.
作者
丁轩
甘玉荣
张春菊
王立强
杨明球
李辉
Ding Xuan;Gan Yurong;Zhang Chunju;Wang Liqiang;Yang Mingqiu;Li Hui(Institute of Engineering,Yantai Nanshan University,Yantai Shandong 265713,China;National Engineering Research Center for Plastic Working of Aluminum Alloys,Shandong Nanshan Aluminum Co.,Ltd.,Yantai Shandong 265700,China;Test Center,Shandong Nanshan Nuantong New Material Co.,Ltd.,Yantai Shandong 265700,China)
出处
《金属热处理》
CSCD
北大核心
2021年第8期174-179,共6页
Heat Treatment of Metals
基金
山东省高等学校青创科技计划(2019KJA019)。
关键词
6016铝合金
汽车外板
箱式退火
连续退火
Mg2
Si
6016 aluminum alloy
automobile body sheet
furnace annealing
continuous annealing
Mg_(2)Si
