厚规格钢板差厚轧制数值模拟与工艺研究
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摘要
基于ABAQUS有限元软件,采用显式动力学算法对厚规格钢板三维常规轧制与差厚轧制热力耦合过程进行模拟仿真,获得差厚轧制变形区金属流动与应力、应变分布规律,研究常规轧制与差厚轧制在轧制过程中轧制力与轧制力矩的变化规律,分析差厚轧制对于轧制过程钢板咬入条件的改善.差厚轧制试验结果表明,制定合理的差厚轧制工艺,可以克服厚板坯轧制时的咬入限制,减小头部冲击造成的力矩峰值的影响,增加厚规格钢板心部变形的渗透,在一定程度上可以改善变形均匀性和组织均匀性.
Based on ABAQUS finite element software,dynamic coupling process about threedimensional conventional rolling and differential thickness rolling for thick steel plates were simulated by an explicit dynamic algorithm.The flow feature and the stress/strain distribution in the distorted region were obtained,the variation laws of rolling force and rolling moment during the process of conventional rolling and differential thickness rolling were studied and the improvement of the biting condition of steel plate during rolling process was analyzed.The results of the differential thickness rolling process show that the reasonable process for the differential rolling can overcome the bite limit of slab rolling,reduce the influence of peak torque caused by head impact and increase the penetration of the core deformation thickness of thick steel plate.Moreover,it can also improve the deformation uniformity and microstructure uniformity at a certain degree.
Based on ABAQUS finite element software,dynamic coupling process about threedimensional conventional rolling and differential thickness rolling for thick steel plates were simulated by an explicit dynamic algorithm.The flow feature and the stress/strain distribution in the distorted region were obtained,the variation laws of rolling force and rolling moment during the process of conventional rolling and differential thickness rolling were studied and the improvement of the biting condition of steel plate during rolling process was analyzed.The results of the differential thickness rolling process show that the reasonable process for the differential rolling can overcome the bite limit of slab rolling,reduce the influence of peak torque caused by head impact and increase the penetration of the core deformation thickness of thick steel plate.Moreover,it can also improve the deformation uniformity and microstructure uniformity at a certain degree.
引文
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[2]Shi G,Hu F X,Shi Y J.Recent research advances of high strength steel structures and codification of design specification in China[J].International Journal of Steel Structures,2014,14(4):873-887.
[3]Moon C H,Lee Y.Approximate model for predicting roll force and torque in plate rolling with peening effect considered[J].ISIJ International,2008,48(10):1409-1418.
[4]Zhu F W,Hu X L,Zhao Z,et al.Analysis of process control model of plate MAS rolling[J].Journal of Iron and Steel Research,International,2010,17(4):31-33.
[5]胡贤磊,曾庆亮,丁敬国.厚板尾部大压下法的应用[J].钢铁,2014,49(12):54-58.(Hu Xian-lei,Zeng Qing-liang,Ding Jing-guo.End heavyreduction method for plate rolling process[J].Iron and Steel,2014,49(12):54-58.)
[6]Jang Y C,Lee Y S,An G B,et al.Temperature dependent fracture model and its application to ultra-heavy thick steel plate used for ship building[J].International Journal of Modern Physics:B,2008,22(31/32):5483-5488.
[7]李永池,谭福利,郭扬,等.金属损伤演化方程和层裂准则的确定[J].宁波大学学报(理工版),2003,16(4):442-446.(Li Yong-chi,Tan Fu-li,Guo Yang,et al.Determination of the damage evolution equation and spallation criterion of metals[J].Journal of Ningbo University(Natural Science&Engineering Edition),2003,16(4):442-446.)
[8]Martineau R L,Anderson C A,Smith F W.Expansion of cylindrical shells subjected to internal explosive detonations[J].Experimental Mechanics,2000,40(2):219-225.
[9]Kane A,Brvik T,Hopperstad O S,et al.Finite element analysis of plugging failure in steel plates struck by blunt projectiles[J].Journal of Applied Mechanics,2009,76(5):911-914.
[10]林莉,支旭东,范峰,等.Q235B钢Johnson-Cook模型参数的确定[J].振动与冲击,2014,33(9):153-158.(Lin Li,Zhi Xu-dong,Fan Feng,et al.Determination of parameters of Johnson-Cook models of Q235B steel[J].Journal of Vibration and Shock,2014,33(9):153-158.)