Haga Toshio, Furukawa Masataka
Department of Mechanical Engineering, Faculty of Engineering, Osaka Institute of Technology, 5-16-1, Omiya, Asahi-ku, Osaka 535-8585, Japan.
Graduate School, Osaka Institute of Technology, 5-16-1, Omiya, Asahi-ku, Osaka 535-8585, Japan.
Materials (Basel). 2024 Jul 21;17(14):3598. doi: 10.3390/ma17143598.
One advantage of twin-roll casting for aluminum alloys is that hot rolling can be omitted, thus shortening the process. The effect of inline hot rolling on the anisotropy of the mechanical properties, especially the elongation, of the roll-cast strip has not been investigated. In a high-speed twin-roll caster, inline hot rolling forms the metal shape before the temperature of the cast strip decreases below the temperature needed for hot rolling. In this study, inline hot rolling of Al-5%Mg strips cast using an unequal diameter twin-roll caster was performed to validate the technique and evaluate its ability to reduce surface cracking and improve the elongation anisotropy. A rolling speed of 30 m/min was used, and the effects of temperature and thickness reduction during inline hot rolling on the surface and mechanical properties were investigated. Inline hot rolling was found to effectively reduce the formation of surface cracks and the anisotropy of the mechanical properties.
双辊连铸铝合金的一个优点是可以省略热轧，从而缩短工艺流程。目前尚未研究在线热轧对铸轧带材力学性能各向异性，尤其是伸长率的影响。在高速双辊连铸机中，在线热轧在铸带温度降至热轧所需温度以下之前就形成了金属形状。在本研究中，对使用不等径双辊连铸机铸造的Al-5%Mg带材进行在线热轧，以验证该技术并评估其减少表面裂纹和改善伸长率各向异性的能力。采用30米/分钟的轧制速度，研究了在线热轧过程中的温度和压下量对表面和力学性能的影响。结果发现，在线热轧有效地减少了表面裂纹的形成和力学性能的各向异性。
