Deform中厚板轧后冷却过程温度场的有限元模拟.docVIP

Deform中厚板轧后冷却过程温度场的有限元模拟 摘要:本论文利用Deform有限元模拟软件对中厚板轧后冷却过程的温度场进行模拟求解，分别得到了钢板在空冷、油冷和水冷三种不同冷却条件下的瞬态温度场分布云图和沿钢板宽度方向上的温降曲线。并通过固定冷却时间来比较三种不同冷却条件下钢板的温降情况。模拟结果表明：三种冷却条件均符合沿钢板的宽度方向，温度从边部到心部逐渐升高。但是相同的冷却时间内，在水冷的条件下，温降最为明显，钢板的温度基本已达到室温；空冷的温降最慢，钢板的温度仍然高达700℃左右；油冷的温降介于水冷和空冷之间，钢板的温度在200℃左右。最后，本文对模拟得到的冷却后钢板边部的温度值及较佳冷却条件进行了实验验证，模拟结果与实验结果基本吻合。关键词：有限元；中厚板；温度场；轧后冷却；数值模拟8587 The Finite Element Simulation for the Temperature Field of Medium Plate during Cooling Process Abstract: In this paper, the temperature field of a wiled medium plate during controlled cooling is simulated and calculated by Deform finite element software, and thus the distributions of transient temperature fields of the steel plate at various cooling stages during air cooling, oil cooling, water cooling and the curves of temperature drop along the width direction. Through a fixed cooling time, analysis on temperature drop to compare with three different cooling conditions. The results show that: the three kinds of cooling conditions are all following rules that temperature gets rising from surface to the heart along the width direction of plate. But in the same cooling time, the temperature drop of water cooling is the most obvious and the temperature of plate has reached room temperature. The temperature drop of air cooling is the slowest and the temperature of plate is about 700℃. The temperature drop of oil cooling is between water cooling and air cooling and the temperature of plate is about 200℃. According to the Deform finite element, we can get a best cooling solution. Finally, the simulated results are identical with the actual results by comparison, both are basically consistent. 3.1引言11 3.2建立有限元模型11 3.3数值模拟结果及分析14 3.3.1三种冷却条件下的温度场分布情况14 （1） 空冷14 （2） 油冷17 （3） 水冷19 3.3.2三种冷却条件下的冷却速率变化规律21 （1） 空冷21 （2） 油冷22 （3） 水冷23 3.3.3三种冷却条件下的比较分析25 3.3.4实验验证27 （1） 冷却后钢板表面温度值的验证28 （2） 较佳冷却条件的验证30 4 结论36 致 谢37 参考文献38 1绪论 1.1中厚板轧后冷却系统组成 中厚板轧后加速冷却设备多数布置在精轧机和热矫直机之间，图1.1为典型的中厚板厂加速冷却设备布置简图。通常的中厚板轧后冷却过程主要包括三个阶段：终轧时刻到水冷之前的空