AZ31温轧过程变形区温度模拟

Simulation of Deformation Zone Temperature for AZ31 in Warm Rolling Process

AZ31镁合金薄板温轧过程中引起变形区温度波动的因素较多,因此变形区温度的精确预测是保证轧制工艺及产品质量的关键.本文利用有限元数值模拟软件针对AZ31镁合金薄板温轧过程变形区温度进行了数值模拟,给出了轧辊及轧件的物性参数及模拟的初始条件和边界条件,确定了影响变形区温度的5个关键因素为轧辊温度、轧件温度、轧件厚度、轧制速度及压下率.通过5水平的模拟正交实验方法获取模拟数据,回归了变形区温度数学模型,最后通过一组温轧模拟实验数据测试了数学模型计算精度.

There are many factors that cause fluctuations of the deformation zone temperature in warm rolling process of AZ31 magnesium alloy strip. Therefore, the accurate prediction of the deformation zone temperature is the key to guarantee the product quality in warm rolling process. The deformation zone temperature of AZ31 magnesium alloy in warm rolling process was simulated by using finite element method . The physical parameters of rollers and strips were given together with the initial and boundary conditions of simulation. The results demonstrated that the five key factors affecting deformation zone temperature are identified as roller temperature, rolled- piece temperature, rolled-piece thickness,rolling speed and reduction ratio. The simulation data were obtained by orthogonal experimental simulation method, the regression model of the deformation zone temperature was gotten. Finally the mathematical model accuracy was detected through a group of simulation data.