连续铸轧塑变与温变强耦合接触压力计算模型

Calculation Model for Contact Pressure Under Intense Coupling Conditions of Roll Casting Deformation and Temperature Variation

在连续铸轧过程中 ,温度分布是影响金属塑性变形的主要因素。轧制变形区温度变化较大 ,平均温度梯度达 2 0 0℃ /cm以上。为了考察这种强变温条件对塑性变形的影响 ,将轧制区温度场简化成线性分布模型 ,并在塑性变形基本方程中引入变温参数 ,导出了塑性变形与温度分布强耦合条件下的接触压力计算模型。

In the continuous casting process, temperataue distribution is a major factor affecting plastic deformation of metals. The variation of temperatare in the rolling deformation zone is great, usually average temperature gradient being above 200 ℃/cm. For the convenience of investigating its influence on plastic deformation, this paper simplifies the temperature field in the rolling zone into a linear distribution model and introduces parameters of temperature variation into the basic equation of plastic deformation, deriving a calculation model for contact pressure under intense coupling conditions of plastic deformafion and temperature distribution. The results obtained by the model are in agreement with actually measured data.