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针对目前困扰热轧中碳高强度宽带钢生产的横向弯曲缺陷,使用有限元软件ABAQUS结合FORTRAN语言编写子程序,建立热轧带钢轧后冷却有限元模型。通过模型计算,分析带钢轧后冷却过程中上下表面的冷却不均以及带钢厚度对带钢横向弯曲的影响。研究结果表明,相同厚度情况下,带钢上下表面冷却不均程度越大,带钢横向弯曲程度越严重,上下表面相同冷却效率比的情况下,带钢越厚,带钢横向弯曲越严重。冷却过程中,受温度变化和相变的综合影响,带钢弯曲方向和大小会发生较大变化,且冷却过程中带钢弯曲量最大值远远大于冷却结束后横向弯曲量。
In view of the transverse bending defects that plague the production of hot rolled high carbon steel with medium strength, finite element software ABAQUS and FORTRAN language are used to compile the subroutine to establish the finite element model of hot rolled strip after cooling. Through the model calculation, the influence of the uneven cooling on the upper and lower surfaces during the cooling process after the strip rolling and the strip thickness on the strip transverse bending were analyzed. The results show that under the condition of the same thickness, the greater the degree of cooling unevenness on the upper and lower surfaces of the strip, the more severe the lateral bending of the strip, and the thicker the strip at the same cooling efficiency ratio of the upper and lower surfaces. During the cooling process, the bending direction and size of the strip change greatly under the combined influence of temperature and phase transformation. The maximum bending amount of strip during cooling is much larger than that after cooling.