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为了提高钢管张力减径过程的轧制质量、降低能耗以及控制终轧温度的准确性,从而为钢管出炉温度提供科学设定依据,通过对传热机理分析,建立了钢管张力减径过程传热模型,给出了除鳞、轧制及空冷阶段钢管边界热流的计算式.基于塑性材料的变分原理,建立了轧制变形区的变形热计算模型.结果表明:变形热对钢管温度分布影响不可忽略;该模型能真实反映钢管在张力减径过程中的温度变化,与实测结果吻合较好,可用于钢管再加热和张力减径过程中的参数分析及工艺优化.
In order to improve the rolling quality, reduce the energy consumption and control the finishing temperature of the steel tube in the process of tension reduction, the basis for scientific setting of the temperature of the steel tube is provided. Based on the analysis of the heat transfer mechanism, The thermal model of the steel pipe at the descaling, rolling and air cooling stages is given. Based on the variational principle of plastic materials, the deformation heat calculation model of the rolling deformation zone is established. The results show that the deformation heat affects the pipe temperature distribution Which can not be neglected. The model can truly reflect the temperature change of steel pipe in the process of reducing the tension, which is in good agreement with the measured results. It can be used to analyze the parameters and optimize the process of steel pipe reheating and tension reducing.