薄板坯连铸连轧含Nb钢变形抗力模型研究  

Research of Deformation Resistance Modeling for Nb Bearing Steel During Compact Strip Process

作　　者：张晓芳[1] 周晓光[1] 刘振宇[1] 王国栋[1] 吴迪[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：《钢铁》2007年第3期37-40,共4页Iron and Steel

基　　金：国家自然科学基金资助项目(50334010和50474086)

摘　　要：利用本钢Gleeble-2000热/力模拟试验机结合本钢薄板坯连铸连轧生产线生产低碳含Nb钢X46的生产工艺,对不同Nb含量的低碳钢进行单道次压缩实验。考虑了钢中Mn和Nb的影响,回归了变形抗力模型。现场数据和热模拟实验结果表明:管线钢X46的再结晶终止温度为981.3℃。薄板坯连铸连轧粗轧阶段的动态软化率接近于1。考虑动态再结晶以及未再结晶区的应变累计,计算的变形抗力与现场实测的变形抗力吻合良好。表明该模型能够预测薄板坯连铸连轧生产线生产低碳含Nb钢的变形抗力。Single pass reduction test of X46 steel produced by compact strip rolling line at Benxi Steel was performed by Gleeble-2000 thermal/mechanical simulation tester. Considering the effect of Mn and Nb content, deformation resistance modeling was studied. Production data and single pass reduction test results show that and temperature of recrystallization for X46 steel is 981.3 ℃;Dynamic recrystallization fraction is close to 1 during rough rolling; Calculated deformation resistances are in good agreement with experimental results by considering the effect of dynamic recrystallization and accumulative strain, showing that the developed model can predict deformation resistance of low carbon Nb bearing steel in compact strip process.

关 键 词：薄板坯连铸连轧 变形抗力 动态再结晶 含NB钢 

分 类 号：TF777[冶金工程—钢铁冶金] TG335.5[金属学及工艺—金属压力加工]