Multi-field Coupled Analysis of Thermal-mechanical Control Process of Large Sized Nb-V Microalloyed Steel Rod
Recently,the property and its formation mechanism of large sized Nb-V microalloyed steel rod get more and more attention from consumers and researchers.In order to deeply describe the whole production process of the large sized Nb-V microalloyed steel rod,the thermal-mechanical control process(TMCP)of the steel rod was investigated by multi-field coupled numerical simulation.The austenite grain evolution models and TTT curve of the tested steel were obtained from the isothermal hot compression tests and isothermal transformation experiment of undercooled austenite,respectively.Then,based on the above tested results,finite element models coupled with austenite grain evolution and phase transformation were developed by FE software MSC.Marc.Using the developed FE models,Nb-V microalloyed steel rod during TMCP was successfully simulated.The simulation results clearly showed the field variable and microstructure evolutions in the rod during the rolling process.The phase transformation during cooling process was also simulated,and the final phase composition in the rod was predicted as ferrite/pearlite,bainite and martensite.Additionally,the simulated temperature,grain size and phase composition in the cross section of rod are agreed well with the experimental ones,which illustrates that the developed FE models are valid and the simulation results can provide useful references for the actual production.
thermal-mechanical control process large sized rod microalloyed steel austenite grain evolution phase transformation numerical simulation
ZHANG Liwen SHEN Wenfei ZHANG Chi CUI Yan XU Yifeng BIE Lifang
School of Materials Science and Engineer,Dalian University of Technology,Dalian 116023,Liaoning,Chin Suxin Special Steel Group Co.,Ltd.,Suzhou 215151,Jiangsu,China
国际会议
STEELSIM2017(第七届冶金过程及钢铁材料模拟及仿真国际会议)
青岛
英文
375-378
2017-08-16（万方平台首次上网日期，不代表论文的发表时间）