双相钢差厚板退火过程的温度场

为了获得性能可控的冷轧双相钢差厚板，需要了解其退火过程中的温度变化规律.采用ABAQUS有限元软件模拟双相钢差厚板在退火过程中不同厚度处的温度分布，结果发现，当差厚板不同区域有相同的冷却速度时，冷却速度越大，厚区与薄区对流换热系数之比越接近差厚比，从2.12变为2.03，且对流换热系数与冷却速度为线性关系;当差厚板不同区域的冷却强度相同时，随着冷速的增加，差厚板薄、厚区温差增大，从124℃升至141℃.随着差厚板斜率的增加，温度影响区长度增加.

Temperature Field in Annealing Process of Dual-Phase Steel TRB

To gain cold rolled dual phase steel TRB (tailor rolled blank) with controllable performance， the annealing temperature variation during annealing is necessary to know. The temperature distribution of dual-phase steel TRB at different thickness in the annealing process was simulated by the finite element software ABAQUS. The results showed that when the different areas in TRB is in same cooling rate， the bigger the cooling rate is， the less gap between the ratio of the convection heat transfer coefficient， which changes from 2.12 to 2.03， and the ratio of thickness is. The convection heat transfer coefficient is directly proportional to cooling rate. When cooling intensity is same in different areas in TRB， the temperature difference between thick and thin area increases from 124℃ to 141℃ with increased cooling rate. If the slope of TRB increases， the length of temperature affected zone increases.