ABSTRACT

The cooling intensity of laminar cooling determines the microstructure of metal materials, thus affecting the performance of products, while the heat transfer coefficient directly affects the cooling intensity. A method to obtain the heat transfer coefficient of laminar cooling is proposed in this work. The distribution form of the heat transfer coefficient is obtained as a piecewise function composed of half wave sine and straight line with the nozzle as the center. The method of obtaining the characteristic parameters of the function through the structural parameters, operation parameters and experimental data is given. The accuracy of the method is verified by the experimental platform, and the influence of characteristic parameters on the temperature field of metal materials is analyzed. The mutual verification between the experimental results and the calculated results provides a strong theoretical basis for the field production process.

摘要

层流冷却的冷却强度决定了金属材料的微观结构，从而影响产品的性能，而传热系数直接影响冷却强度。本文提出了一种获得层流冷却传热系数的方法。传热系数的分布形式为由半波正弦和以喷嘴为中心的直线组成的分段函数。给出了通过结构参数、运行参数和实验数据获得函数特征参数的方法。通过实验平台验证了该方法的准确性，并分析了特征参数对金属材料温度场的影响。