论文部分内容阅读
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 the cooling process of X70 pipeline steel coil and taking into account the influence of latent heat of phase transformation, the initial compressive pressure of interlayer is calculated first, and then the radial thermal conductivity is calculated according to the pressure of interlayer, then The radial thermal conductivity obtained is substituted into the temperature field, so that the temperature drop curve and the interlayer pressure value of the coil during the cooling process are obtained iteratively. The results show that during the cooling process, the variation trend of the inter-layer pressure first increases and then decreases to zero gradually. When the axial direction of the coil, the interfacial pressure is smaller at the end surface and the center is relatively larger. In the radial direction of the coil, interlayer pressure is larger near the inner diameter wall and smaller near the outer diameter wall.