作　　者： ; ; ; ; ;

机构地区： 东北大学材料与冶金学院轧制技术及连轧自动化国家重点实验室

出　　处： 《钢铁》 2006年第10期42-45,共4页

摘　　要： 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6.5 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。 A new method to calculate temperature rise in high speed wire rolling is proposed according to heat line theory. For high rolling speed and poor cooling conditions in wire finish rolling, the rolling process can be considered as adiabatic and the external work done during the process is nearly all transformed into heat, that means all the heat making wire temperature rise come from the shear power along tangential velocity discontinuity lines in deformation zone, which called thermal distribution lines or ＇heat lines＇. The temperature rise for a pass is the sum of temperature rises of those heat lines in the deformation zone of the pass. From the theory and assumption that for a single pass the elliptic long or minor axis is not deformed, a formula of temperature rise of the wire during finish rolling was derived out. The calculated and measured temperature rises for ~ 6.5 mm wire are compared. The results show that the calculated temperature rise is slightly less than the measured one and the lower temperature of wire at entry, the higher the accumulative temperature rise is.

关 键 词： 热线 速度不连续线 剪切功率 温升 高速线材轧制

领　　域： [金属学及工艺]