基于热线理论提出计算高速线材轧制温升的新方法.由于线材精轧轧制速度快,散热条件差,可认为轧制过程是绝热的,线材轧制外功几乎全部转换为热.线材温升的热量全部来自于变形区内的速度不连续线所做的剪切功率,称此速度不连续线为热量分布线(热线).道次温升为变形区内全部热线温升的总和,在假定道次变形中椭圆长轴或短轴不变条件下推导出高速线材精轧机组温升计算公式.对φ6.5 mm线材精轧进行了实际温升计算与测量,结果表明:计算的理论温升略低于实际测量温升,线材精轧入口温度越低,出口累计温升越大.
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