工业纯铝多道次热轧工艺的实验模拟

Experimental Simulation on Multipass Hot-rolling Process of Commercial Purity Aluminium

参照美国一铝业公司热轧工艺规程，在Ｇｌｅｅｂｌｅ－１５００热模拟机上，对工业纯铝多道次热轧过程进行了实验模拟，通过对变形后试样组织的金相与ＴＥＭ观察及显微硬度测量，发现亚晶粒随着道次增加逐渐形成完善，其尺寸逐渐变小；再结晶不仅取决于轧制温度，而且还与变形不均匀带，累积变形量及道次间停留时间有关；在试样厚度较大的某些道次，发生再结晶的位置交替地由高向两侧转向中心部位。

Multipass hot-rolling process of 1050 aluminium alloy was simulated onGleeble-1500 according to a typical pass schedule. The deformed specimens were analysisedby the observation of optical micrography and TEM, and the measurement ofmicro-hardness. It was shown that the subgrains are well formed and the size decrease withincreasing of rolling pass. Recrystallization not only depends on the rolling temperature, butalso on the inhomogeneous deformation band, the accumlated strain and the pause times between passes. The sites of recrystallization change alternately from the two sides to the centreof the deformed specimens in the through-thickness direction in some passes which thethickness of the specimens is higher.