The article presents a novel technique for performing high reduction radial shear rolling (HRRSR) of aluminum alloy bars. For this purpose, rolls with a special calibration were developed, including a high reduction section and a roll feed angle of 20°. The proposed process was investigated using FEM simulation, first. The temperature, stress-strain state, and force parameters analysis showed that the proposed method can produce defect-free bars with a natural gradient microstructure. Afterward, the experimental alloy Al-3Ca-2La-1Mn (wt%), was processed by a single-pass HRRSR process, resulting in a bar with an elongation ratio of 5. High compression and shear strains provide severe deformation of the initial cast microstructure and form a uniform distribution of small eutectic inclusions of the Al4(Ca, La) phase in the aluminum matrix. The obtained results, indicate the possibility of severe deformation of aluminum alloys using the radial shear rolling method. The proposed method of deformation can be the basis for an effective technology for obtaining bulk, long-length bars from various aluminum alloys, with a high reduction in a single pass.

本文介绍了一种对铝合金棒材进行高压下量径向剪切轧制 (HRRSR) 的新技术。为此，开发了经过特殊校准的轧辊，包括高压下部分和 20° 的轧辊进给角。首先使用有限元模拟对所提出的过程进行了研究。温度、应力应变状态和力参数分析表明，该方法可以生产具有自然梯度微观结构的无缺陷棒材。随后，实验合金 Al-3Ca-2La-1Mn (wt%) 通过单道 HRRSR 工艺进行加工，得到延伸率为 5 的棒材。高压缩应变和剪切应变使初始铸件发生严重变形显微组织并在铝基体中形成均匀分布的 Al4(Ca, La) 相小共晶夹杂物。所得结果表明，采用径向剪切轧制方法铝合金可能会发生严重变形。所提出的变形方法可以成为从各种铝合金中获得大块、长长度棒材的有效技术的基础，并且在单道次中具有较高的压缩率。