方坯轧制在线感应加热数值模拟与设计优化

针对方坯感应加热轧制过程容易发生边角升温不均匀的问题,建立了轧件移动式感应加热工况的电磁-传热耦合模型,并进行了有限元数值模拟分析。基于感应加热轧制工业运行数据,验证了模型的合理性,并对感应线圈设计进行了结构优化改进。结果表明,改进设计的感应线圈在钢坯边角部位的磁通密度分布得以明显地改善,工件边角部位的温差得以显著地降低,这有利于解决合金钢方坯轧制过程中常见的边角开裂问题。

Numerical simulation and design optimization of on-line induction heating process for billet steel rolling

Aiming at the popular uneven edge temperature during induction heating and rolling for billet castings,a coupled magnetic-thermal model has been presented,together with a following finite element analysis.Based on the industrial data from actual application,the validated model has been adopted for the optimization of the induction coils.It is shown that the magnetic flux density of the coils at the edge area has been improved with the new design,which is beneficial to reduce the temperature difference of rolling products.Accordingly,the possible edge crack due to uneven temperature during hot rolling process can be well controlled specially for alloyed steels.