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通过分析热轧带钢在层流冷却过程中的能量变化,利用焓法模型建立了热轧带钢通过层流冷却段的能量平衡方程。然后利用相变热力学和相变动力学模型得到热焓,最后采用有限差分求解能量平衡方程,得到层流冷却过程中带钢的温度场和热焓场,该模型的计算结果与实测值符合良好,能够准确地预测带钢冷却后的温度分布,同时明确了冷却过程实际上是带钢能量传递给周围环境的过程,并非温度不断下降的过程。
By analyzing the energy change of hot strip in the laminar cooling process, the energy balance equation of the hot strip through the laminar cooling section is established by enthalpy method. Then, the enthalpy is obtained by using the phase change thermodynamics and the phase change kinetic model. Finally, the finite difference method is used to solve the energy balance equation to obtain the temperature field and enthalpy field of the strip during the laminar cooling. The calculated results are in good agreement with the measured values, Can accurately predict the temperature distribution of the strip after cooling, at the same time, it is clear that the cooling process is actually the process of transferring the energy of the strip to the surrounding environment, not the temperature declining.