Cooling Control of Non-Conventional Rolls for Steel Rolling

轧钢用的轧辊，即使没有因灾难性断裂或其他重大故障而损坏，也必须经常更换，因为磨损和剥落。适当的冷却似乎对轧辊寿命有显著的影响，但很少有明确的信息，为什么和如何。提出的研究旨在提供一个基本的了解轧辊冷却对轧辊的热和机械响应的影响。替代冷却做法将寻求减少轧辊磨损和剥落引起的热失效应力。德雷塞尔大学开发了一种实验室设备，可以模拟钢厂使用的冷却轧辊。该装置将配备大量仪器，以确定轧辊表面和作为冷却剂的水雾之间的传热系数。热信息将被用作确定轧辊应力场的数值模型的输入。

The rolls used in the rolling of steel, even if undamaged by catastrophic fracture or other major failure, must be changed frequently because of wear and spalling. Proper cooling appears to have a significant effect on roll life, but there is very little definitive information about the why and how. The proposed study is aimed at providing a basic understanding of the influence of roll cooling on the thermal and mechanical responses of rolls. Alternative cooling practices will be sought for reducing roll wear and spalling caused by thermal failure stress. A laboratory apparatus has been developed at Drexel University which models the cooled rolls used in steel mills. The apparatus will be heavily instrumented to determine the heat transfer coefficient between the roll surface and the water spray which serves as a coolant. The thermal information will be used as input to a numerical model for determining the stress field in the roll.