中厚板控制冷却数学模型

介绍了中厚板控制冷却过程中所用的数学模型,包括差分模型、空冷和水冷换热系数模型、比热和热传导率模型,并采用有限差分法模拟计算了钢板在冷却过程中厚度、宽度方向上的温度场分布,以及间歇冷却对控制冷却的影响·从模拟结果可以看出,返红时间、厚度上温度梯度随钢板厚度增加而增加;间歇冷却时钢板内部温度呈均匀下降,表面不断冷却与返红过程·在线应用证明该套数学模型计算精度较高,可以满足现场实际生产的要求·

Mathematical Model for Cooling Control of Medium Plates

The model showed by the topic was introduced including a difference expression and some models for heat transfer coefficient air/water cooling specific heat and heat conductivity. Applying the finite difference method to the simulation of cooling process, the temperature field along the thickness/width of plate was calculated, as well as the effect of intermittent cooling on the result of cooling control. Simulating results show that the re-reddening time and temperature gradient along thickness increase with plate thickness and the inner temperature of plate decrease evenly if cooling intermittently, with plate surface continuously cooled and re-reddended. The on-line applications revealed that the model can get high accuracy in calculation to meet actual requirements in production.