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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 dynamic finite element software ANSYS / LS-DYNA was used to establish the elasto-plastic finite element model of two-dimensional five-bar rolling of horizontal roller system. By using the method of small-size restart, the rigid inclusions in the rolling process of DCO3 cold- The deformation was simulated and the influence of inclusions size, initial position and the amount of rolled plate on the deformation of inclusions was analyzed. The results show that the simulation results are close to the actual ones. The degree of deformation of the inclusions in the rolling plate mainly increases with the reduction of the rolling plate and the size of the inclusions and the decrease of the distance of the inclusions from the surface of the rolling piece . Rolled from 3.0mm was rolled to 0.7mm, inclusions diameter of more than 20μm, after the end of rolling inclusions before and after the deformation of a greater degree, the rolling may occur as a result of inclusions rupture of the source of cracks.