摘要
针对镁/铝板材轧制复合在轧后容易出现弯曲问题,提出了蛇形轧制复合工艺,以达到降低轧后弯曲曲率并提高界面结合强度的目的。利用ANSYS LS-DYNA有限元软件,研究了蛇形轧制复合过程中不同错位量、异速比、压下量、层厚比及轧制温度对轧后复合板的弯曲曲率的影响规律,并开展轧制复合实验,验证了有限元计算结果的准确性。结果表明,与异步轧制相比,蛇形轧制可有效降低轧后复合板弯曲曲率。相同轧制条件下,异步轧制轧后弯曲曲率随着异速比的增大而增大,随着压下量及层厚比的增大而减小。蛇形轧制错位量可对轧后弯曲抑制产生明显的效果,在一定范围内,复合板的弯曲曲率随错位量的增大而减小。当初始板厚为50 mm、层厚比为2:3、压下量为30 mm、轧制温度为400℃、异速比为1.05和错位量为30 mm时,轧后复合板接近平直。
Aiming at the bending problem of Mg/Al composite plates after rolling bonding,the snake rolling bonding technology was put forward to reduce the bending curvature after rolling and improve the interface bonding strength.The bending curvature variation laws of the composite plate after the snake rolling bonding process were studied with different roll offsets,roll speed ratios,reductions,thickness ratios and rolling temperatures by the finite element software ANSYS LS-DYNA,and the accuracy of the finite element results was verified by rolling bonding experiment.The results show that compared with asynchronous rolling,the snake rolling can effectively reduce the bending curvature of composite plates after rolling.Under the same rolling condition,the bending curvature after asynchronous rolling increases with the increase of speed ratio,and decreases with the increase of reduction and layer thickness ratio.The roll offset in snake rolling has obvious effect on the inhibition of bending after rolling,within a certain range,the bending curvature of the composite plate decreases with the increase of roll offset.The rolled composite plate is nearly flat when the initial thickness of plate is 50 mm,the layer thickness ratio is 2∶3,the reduction is 30 mm,the rolling temperature is 400℃,the different speed ratio is 1.05 and the roll offset is 30 mm.
作者
江连运
马琦琦
薛志伟
李扬辉
卫垚宇
张华君
JIANG Lian-yun;MA Qi-qi;XUE Zhi-wei;LI Yang-hui;WEI Yao-yu;ZHANG Hua-jun(School of Mechanical Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2023年第3期46-52,共7页
Journal of Plasticity Engineering
基金
国家自然科学基金面上资助项目(52175354)
山西省科技重大专项(20181102016)。
关键词
蛇形轧制复合
弯曲曲率
镁/铝复合板
有限元
轧制复合实验
snake rolling bonding
bending curvature
Mg/Al composite plate
finite element
rolling bonding experiment
