摘要
运用ANSYS/LS-DYNA显示动力学有限元软件,建立了水平辊系二维五连轧弹塑性有限元模型,利用小型重启动方法对DCO3冷轧板五连轧过程中轧板内硬性夹杂物变形进行了模拟,分析了夹杂物尺寸、初始位置以及轧板压下量对夹杂物变形的影响。研究结果表明:模拟结果与实际相接近,轧板内夹杂物的变形程度主要随着轧板压下量的增加和夹杂物尺寸的增大以及夹杂物距轧件表面距离的减小而增大。轧件由3.0mm被轧到0.7mm,夹杂物直径超过20μm时,轧制结束后夹杂物前后部位处变形程度较大,轧件内部可能会产生由于夹杂物破裂而形成的裂纹源。
The deformation of hard inclusion in the cold rolling process of DC03 steel sheet has been focused on,and the effects of reduction,inclusion size and position in the strip were investigated.A two-dimensional elastic-plastic finite element model of five-stand tandem rolling was established with ANSYS/LS-DYNA analysis software.The process of continuous rolling was simulated by a small scale restart method.The results show that the simulated results are reliable.The deformation of inclusions increases with reducing of the thickness of strip,enlarging of inclusion＇s diameter and decreasing of the distance between the inclusion and the surface of strip.Meanwhile,when the diameter of inclusions are larger than 20μm,it is mostly likely to form the crack due to the crashed of inclusion when the thickness of strip is rolled from 3.0mm to 0.7mm.
出处
《中国冶金》
CAS
2014年第7期36-41,共6页
China Metallurgy
关键词
冷轧
夹杂物
有限元模拟
变形
cold rolling
inclusion
numerical simulation
deformation
