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通过Deform-3D有限元分析软件及正交实验,模拟并优化了20A钢棒材热连轧过程的工艺参数,并对该热轧工艺条件下的20A钢棒材的晶粒组织的有限元数值模拟以及物理实验验证进行探索。对比数值模拟值与物理实验值,研究结果表明:在最佳工艺参数条件下,数值模拟的20A钢棒材平均晶粒尺寸为45.8 mm,而物理实验中的平均晶粒尺寸为47.56 mm,二者数值均满足技术要求,且误差仅为3.7%,通过有限元模拟能够成功地预测热轧变形过程晶粒尺寸大小。
Through the Deform-3D finite element analysis software and orthogonal experiment, the process parameters of the hot rolling process of 20A steel bar were simulated and optimized, and the finite element numerical value of the grain structure of 20A steel bar under the hot rolling process Simulation and physics experiment to explore. The results of numerical simulation and physical experiment show that the average grain size of 20A steel bar is 45.8 mm, and the average grain size is 47.56 mm in physical experiment under the optimum technological parameters. The numerical values all meet the technical requirements and the error is only 3.7%. Through the finite element simulation, the grain size of hot-rolling deformation can be successfully predicted.