热轧带钢在常规层流冷却中温度不均匀性的有限元分析

来源期刊：钢铁2011年第4期

论文作者：余伟 卢小节 陈银莉 白冰

文章页码：44 - 48

关键词：热轧带钢； 层流冷却； 温度场； 有限元法

Key words：hot rolling strip； laminar cooling； temperature field； finite element method

摘    要：采用MARC有限元软件,对不同宽度和厚度的普碳钢Q235和管线钢X70的热轧带钢在常规层流冷却中的温度场进行了计算和分析。结果表明:常规层流冷却加剧带钢在宽度和厚度方向的冷却不均匀性。冷却过程中12mm厚X70管线钢带钢的上、下表面温差达到30℃,会使带钢产生冷却翘曲。上集管的流量均匀分布设计和下集管固定流量设计是常规冷却设备产生不均匀冷却的主要原因。提出了减少不均匀性的措施。

Abstract: The temperature field of the hot rolling plain carbon steel and pipeline steel strip with different width and thickness in the conventional laminar cooling condition was calculated and analyzed by MARC finite element method software.The results are shown that: the cooling non-uniformity of strip in width and thickness is enhanced by laminar cooling.The temperature difference of 30℃ between upper and bottom surface results in cooling warp,while X70 steel strip in 12mm thickness cooled by conventional laminar device.The main reason of non-uniform cooling is the structure design of upper and bottom manifold,the upper manifold header designed with transversally uniform water fluid distribution and the bottom header with constant fluid for the strip of all thickness.The upgrade proposal is presented to reduce the non-uniformity due to the laminar cooling.