HW300×300H型钢热力耦合模拟计算分析

Analysis on Simulation Calculation of Thermodynamic Couple for HW300×300 H Beam

以HW300×300为典型案例采用双线性硬化材料模型计算了H型钢变形过程中温度、应变、外形尺寸的变化,分析了轧制过程的变形特点。用全流程思维使用热力耦合计算方法进行计算,轧件变形温度使用过程温度,充分考虑了横断面温度不均匀的影响,计算结果更加接近真实情况,为工艺优化提供可靠依据。计算结果表明,由于不均变形导致H型钢腰部在三角区附近出现“颈缩”现象,翼缘端部的局部变形会导致翼缘宽度精度的变化,轧制变形功会转化为热能,导致轧件内部温度出现升高迹象。

The deformation characteristics in rolling process are analyzed through calculating the changes of temperature,strain and external dimensions during the deformation process of H beam with bilinear hardened material model by taking HW300×300 as the typical case.The calculations are with the thinking of all process and calculation method of thermodynamic couple,process temperature is used as deformation temperature of rolled piece as well as the effects of uneven temperature of cross section are taken into full consideration so that the calculation results are more close to actual situations,which provide the reliable basis for process optimization.The calculation results showed that there was necking near the trigonum on waist of H beam due to inhomogeneous deformation,local deformation at flange end would cause precision of flange width to change as well as rolling deformation work would transform into heat energy so that internal temperature of rolled pieces would rise.