中文摘要：

钛材广泛应用于航空航天等领域,但由于其在冷轧过程中容易出现粘辊问题,造成生产效率较低。针对该问题,首先计算了Ti、Al、Cu、Mg与Fe的界面结合能及各金属内部结合能,Ti与Fe界面粘着能大于各金属内部结合能,而另3种金属则介于金属内部结合能之间,因此当Fe、Ti表面紧密接触并发生相对运动时,断裂将发生于Ti基体较深层处。然后分析了TA2冷轧工况下的粘辊情况,为表征粘辊程度,在建立冷轧粘着指数模型的基础上,重点分析了压下规程、轧制速度、润滑剂种类等因素对粘辊程度的影响,提出TA2冷轧速度应低于3 m/s,单道次压下率应低于20%等防粘工艺,对于指导生产实践、治理粘辊具有现实意义。

英文摘要：

Titanium has been widely used in aerospace and other fields. But one of the key factors of low processing efficiency is the sticking problem between titanium plate and the roll surface during the process of cold rolling. Focusing on this problem, we calculated the interfacial adhesion energies between Ti, Al, Cu, Mg and Fe and their internal binding energies. Results show that the interfacial adhesion energy between Ti and Fe is greater than the internal binding energy of Ti and Fe, which is different from the other three metals. Therefore, fracture will occur on the deeper layer of titanium plate substrate with close contact and relative movement between Fe and Ti surfaces. Then, the sticking situation of TA2 during the cold-rolling process was analyzed. The lubricating film is easier to rupture than other metals due to titanium＇s unique properties, which results in direct contact and sticking between roller and titanium plate. Consequently, the sticking index is proposed to characterize the degree of sticking. The influence of draft rolling schedule, rolling speed and lubricant type on the degree of sticking was analyzed. We conclude that the cold-rolling speed of TA2 should be lower than 3 m/s, and the reduction rate of each pass less than 20%, which is important to guide the productive practice and to prevent sticking.