In the comparative experiments of vibration and non‐vibration cast‐rolling, it is found that the vibration can significantly enhance the dynamic recrystallization effect in the plastic deformation stage during cast‐rolling. In order to explore the strengthening mechanism, the physical simulation experiment and the numerical simulation based on Yada model are used to study the plastic deformation stage of the cast‐rolling process. The research results show that the Yada model can accurately calculate the change history of grain size during vibration rolling. It is also found that the vibration frequency can promote the recrystallization nucleation by changing the equivalent plastic strain in the cast‐rolling strip during deformation, thereby effectively reducing the average grain size, whereas the amplitude only affects the start time of the dynamic recrystallization. In addition, it is found that vibration can effectively improve the uneven distribution of grain size on the cross section of cast‐rolling strip.

中文翻译：

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振动铸轧塑性变形区动态再结晶研究

在振动和非振动铸轧的对比实验中，发现振动可以显着增强铸轧塑性变形阶段的动态再结晶效果。为了探索强化机理，利用基于Yada模型的物理模拟实验和数值模拟研究了铸轧过程的塑性变形阶段。研究结果表明，Yada模型可以准确计算出振动轧制过程中晶粒尺寸的变化历史。还发现振动频率可以通过改变变形过程中铸轧带钢的等效塑性应变来促进再结晶形核，从而有效地减小平均晶粒尺寸，而振幅仅影响动态再结晶的开始时间。此外，发现振动可以有效改善铸轧带材横截面上晶粒尺寸的不均匀分布。