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.
Several finite element models during the cooling process of hot rolled strip on the ROT are established to re-search transverse bending defects with the software ABAQUS combined with language of FORTRAN. The influence of the uneven cooling of the upper and lower surfaces and the strip thickness on the strip transverse bending is analyzed ac-cording to the models. The results show that the transverse bending will be more obvious as the difference of cooling effi-ciency of the two surfaces is larger. Besides,if the difference of cooling efficiency on the two surfaces is invariable,strip transverse bending will be more serious as the strip being thicker. During cooling process,the bending direction and size of strip will change a lot under the influence of temperature change and phase transformation. The maximum bending value of the strip in the cooling process is much larger than the bending value after cooling.
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