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针对单辊法制备带材自由表面质量差、传统铸轧工艺铸轧速度慢且不能制备宽凝固区间合金的缺点,提出一种可以改善表面质量,提高生产速度的上方侧注式双辊铸轧工艺。以Al-10Cu合金为试验材料,制备出宽100mm,厚1.7～2mm,长数m的金属薄带,铸轧速度可以达到60m/min。并对带坯表面状态和微观组织做了比较分析。结果表明,应用异径双辊铸轧工艺可以制备传统工艺难以制备的铝合金,并且带形和表面质量均良好,无明显缺陷;微观组织细小均匀,无明显偏析。为了更直观地了解成形过程中熔体的情况,利用ANSYS Fluent软件进行了模拟,与试验相符合。
Aiming at the defect that the free surface quality of the strip is poor by the single roller method and the casting speed of the traditional casting process is slow and the alloy with wide solidification zone can not be prepared, a top-side twin-roll twin-roll casting which can improve the surface quality and increase the production speed is proposed Process. Al-10Cu alloy was used as the test material to prepare a metal strip with a width of 100mm, a thickness of 1.7mm to 2mm and a length of m. The casting speed can reach 60m / min. The condition of the billet surface and the microstructure were compared and analyzed. The results show that the use of different diameter twin roll casting process can be prepared by traditional processes difficult to prepare aluminum alloy, and the strip shape and surface quality are good, no obvious defects; microstructure fine uniform, no obvious segregation. In order to know more about the melt during the forming process, the simulation was done with ANSYS Fluent software, which is consistent with the experiment.