400MPa级超级钢热连轧过程中温度及MFS的预测  

Prediction of Temperature Distribution and Flow Stress Evolution During the Multipass Hot Rolling of 400?MPa Super-Steel

作　　者：许云波[1] 郑晖[1] 刘相华[1] 王国栋[1] 

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2002年第6期569-572,共4页Journal of Northeastern University(Natural Science)

基　　金：国家重点基础研究发展规划项目 (G19980 615 0 9);辽宁省自然科学基金资助项目 (2 0 0 110 10 2 1)

摘　　要：采用有限单元法对热连轧生产过程中沿带钢厚度方向的温度场分布进行了预测 ,计算中考虑了带钢在机架间从表面的辐射和对流传热 ,在轧制过程中与轧辊表面的热传导和变形热·在温度场模型基础上 ,同时考虑动态、亚动态及静态再结晶的影响 ,尤其是低温区形变诱导相变软化作用 ,建立了计算精轧过程应力 应变曲线的流变应力模型 ,并对 4 0 0MPa级超级钢细晶化工业轧制中各道次的平均流变应力进行了预测 ,该模型的计算结果与Sims结果吻合较好 。Finite element method was used to calculate the temperature distribution through the thickness of the workpiece during hot rolling. Based on the temperature model, the multipass stress strain curve and mean flow stress were predicted during the finishing rolling of 400?MPa super steel. The model incorporates the effects of dynamic, metadynamic, and stastic recrystallization, and takes deformation induced transformation into account. The measured mean flow stress values agree with the predicted values over the whole range of rolling temperatures.

关 键 词：超级钢 热连轧 MFS 预测 温度分布 平均流变应力 应力-应变曲线 再结晶 

分 类 号：TG335.1[金属学及工艺—金属压力加工]