锻压技术

F45V非调质钢动态再结晶模型及数值模拟

英文标题：Dynamic recrystallization model and numerical simulation for F45V nonquenched and tempered steel

作者：马文龙王进王宝平许德鹏陈学文

分类号：TG142.1

出版年,卷(期):页码：2013,38(2):138-142

摘要：

采用Gleeble-1500热模拟实验机对F45V非调质钢进行热模拟实验，实验中变形温度控制在950～1200℃、应变速率在0.01～10s-1、应变量为0.8。通过数据采集获得真应力应变曲线，建立了动态再结晶分数模型、晶粒尺寸模型。应用Deform3D有限元软件模拟F45V非调质钢热变形过程与动态再结晶行为，研究工艺参数与锻件变形程度对动态再结晶的影响。研究结果表明：大变形区域先发生动态再结晶，并且再结晶分数高于其他变形区域；提高变形温度、降低应变速率有利于动态再结晶的生成；模拟结果与实验结果吻合较好。

A thermal simulation experiment on F45V non-quenched and tempered steel was finished on Gleeble-1500 thermal simulation machine and dynamic recrystallization fraction model, grain size model and the different flow stress-strain curves were obtained under 9501200℃, the strain rate of 0.01 to 10s-1 and the strain of 0.8. The hot deformation process and the behavior of dynamic recrystallization for F45V non-quenched and tempered steel were investigated on the software platform of Deform-3D. The simulated results show that the DRX occurs sufficiently at the large deformation zones of the forging with sufficient deformations, and the recrystallized fraction is higher than the other deformation zone; raising deformation temperature and reducing strain rate are contributed to the DRX of F45V. The simulation results are in good agreement with the experimental results.

基金项目：

山东省自然基金资助项目（ZR2010EQ027）

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