椭圆孔型轧制合金钢方坯三维弹塑性有限元模拟

为设计安全合理的合金钢椭圆孔型系统，采用三维热力耦合弹塑性有限元模拟仿真技术，超前再现了合金钢方坯在椭圆孔型中金属的三维流动过程并获得了轧制力及力矩等重要参数的变化规律．结果表明：表面和心部金属沿轧制方向流动速率的不同导致合金钢方坯端部横断面产生凹形；轧制力和轴向力及轧制力矩和径向力矩具有相似的变化趋势，即咬入和抛钢阶段其值变化较大而稳定轧制阶段变化较小．

Three Dimensional Elastoplastic Finite Element Simulation on the Hot-rolling in Oval Pass of a Steel Billet

The hot rolling of a steel billet in oval pass and the variations of rolling force and torque are simulated by three-dimensional thermo-mechanical coupled elastoplastic finite element simulation. It is shown that the difference between the velocities of the metal flow along the rolling direction on the surface and in the inner part of the billet results in the concave section at the rolled steel ends. The rolling force, the axial force, rolling torque and radial torque have a similar variation, which is large during the period of the steel billet being engaged with or leaving from the oval-pass and small during the period of the stable rolling.