Abstract

The article discusses the features of radial shear rolling (RSR) of the aluminum alloy Al–Mg–Sc. The modeling of the RSR process by the finite element method in the QForm 3D program with variation of the elongation ratio per pass and the rolling speed has been implemented. On the basis of the results obtained, a study of the temperature field of the rod in the deformation zone has been carried out taking into account the cyclic deformation and the configuration of the flow trajectories. It is found that changes in the temperature field of the rod in the deformation zone are determined by the difference in the trajectory flow of the metal in the surface layers and in the axial zone. When the elongation ratio is varied from 1.6 to 2.4, heating occurs inconsistently from the center to the surface. The largest increase occurs for an area that is approximately 0.3R from the surface. For the axial zone, the temperature change in the deformation zone occurs smoothly and with an insignificant temperature difference of 5–10°C. The temperature on the surface of the rod has the greatest temperature fluctuations, which are explained by deformation heating and simultaneous contact with a cold roll during each deformation cycle. With a decrease in the rolling speed, a picture of the distribution of the temperature field of the rod in the deformation zone is observed, when the temperature of the central layers exceeds the surface temperature. Because of the long contact time of the rod with the roll, the surface temperature fluctuates up to 40–50°C with each deformation cycle. With an increase in the rolling speed, the amplitude of temperature fluctuations on the surface decreases, and the deformation heating increases. The obtained data on the relationship of controlled technological parameters with a change in the temperature field of the rod can be useful in the design of technological modes of rolling.

中文翻译：

---

基于有限元模型的轧制铝合金Al-Mg-Sc的温度-变形条件分析

摘要

本文讨论了铝合金 Al-Mg-Sc 的径向剪切轧制 (RSR) 的特性。通过 QForm 3D 程序中的有限元方法对 RSR 过程进行建模，其中每道次的延伸率和轧制速度的变化已经实现。在得到的结果的基础上，考虑循环变形和流动轨迹的配置，对杆在变形区的温度场进行了研究。发现变形区棒材温度场的变化是由表层金属和轴向区金属轨迹流动的差异决定的。当伸长率从 1.6 变化到 2.4 时，从中心到表面的加热不一致。R从表面上看。对于轴向区，变形区的温度变化平稳，温差为 5-10°C，可忽略不计。棒材表面的温度波动最大，这可以通过在每个变形循环中变形加热和同时与冷轧辊接触来解释。随着轧制速度的降低，当中心层的温度超过表面温度时，可以观察到棒材在变形区的温度场分布图。由于棒材与轧辊的接触时间长，每个变形循环的表面温度波动高达 40-50°C。随着轧制速度的增加，表面温度波动幅度减小，并且变形加热增加。获得的关于受控工艺参数与棒材温度场变化关系的数据可用于设计轧制工艺模式。