CSP连轧过程温度和轧制力的有限元分析

借助Marc商用软件,采用弹塑性大变形热力耦合有限元法,对0.19%～0.20%C钢68 mm薄板坯CSP 6道次连轧过程的温度以及轧制力进行模拟,分析了轧制过程中各道次轧件温度和轧制力的分布与变化规律。结果表明,在轧件变形过程中,接触热传导和变形热是影响温度变化的主要因素,二者的综合作用决定了轧件的温度变化规律;轧制结束后,轧件从表面向内在一定厚度范围内出现明显的温度梯度,超过该临界厚度值,轧件温度基本保持不变。在轧制稳定阶段,轧制力在微小范围内波动。

Finite Element Analysis on Temperature and Rolling Force during Continuous Rolling of CSP Process

The simulation on temperature and rolling force of 68 mm slab of 0. 19-0. 20C steel during 6 passes rolling of compact strip production (CSP) process has been carried out by commercial software Marc with heavy deformed elasticplastic thermal-mechanical coupled finite element method to analyze distribution and change of temperature and rolling force of workpiece at each pass in rolling process. Results show that during deformation of workpiece, contact heat conduction and deforming heat are main factors to influence temperature change, and both combined effects determine the law of temperature change of work piece during deformation process ； there is an obvious temperature gradient from surface to centre with certain depth of workpiece, and beyond the critical depth, the temperature of workpiece maintains constant ； and the rolling force keeps little variation during stable rolling stage.