热轧钢卷冷却过程中层间压力的数值模拟  

Numerical simulation of interlayer pressure of hot rolled steel coil during cooling process

作　　者：王乙法 余伟[1] 轩康乐 李明辉[1] 

机构地区：[1]北京科技大学工程技术研究院,北京100083

出　　处：《塑性工程学报》2017年第3期43-49,共7页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(51274036)

摘　　要：通过建立X70管线钢钢卷冷却过程中的有限元模型,考虑相变潜热的影响,先由初始的温度场求出层间压缩压力,进而根据层间压力值求出径向导热系数,然后再把得到的径向导热系数代入温度场,如此反复迭代求得钢卷在冷却过程中的温降曲线和层间压力值。结果表明:钢卷冷却过程中,钢卷层间压力的变化趋势为先增加后逐渐减小为零;沿钢卷轴向方向上,层间压力在端面处较小,中心部位相对较大;沿钢卷径向方向上,层间压力在近内径壁处较大,近外径壁处较小。By establishing the finite element model of cooling process of X70 pipeline steel coil and considering the effect of the latent heat of phase transformation, the interlayer compression pressure was calculated according to the initial temperature field, and the thermal conductivity in the radial direction was calculated according to the interlayer pressure value which was put into temperature field, then the cooling curve and the interlayer pressure values of steel coil during cooling process were iteratively obtained by doing so repeatedly. The results show that the interlayer pressure increases first and then decreases gradually in the cooling process of steel coil; the interlayer pres- sure is small at the end face and is relatively large in the center along the axial direction of the steel coil, and it is small near outer diame- ter wall and is relatively large near inner diameter wall along the radial direction.

关 键 词：钢卷 层间压力 导热系数 有限元 相变潜热 

分 类 号：TG335.11[金属学及工艺—金属压力加工]