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在Gleeble-3800热模拟实验机上对F35MnVN非调质钢进行双道次压缩实验,获得不同变形条件下的应力应变曲线,根据Avrami方程建立静态再结晶动力学模型,计算出静态再结晶激活能为178.2kJ.mol-1。在Gleeble-3800热模拟实验机上对F35MnVN非调质钢进行单道次压缩实验(与双道次条件相同),对试样进行金相实验,并建立静态再结晶晶粒尺寸模型。研究结果表明,实验结果与模型预测结果吻合较好,此模型可适用于F35MnVN非调质钢热变形过程中的数值模拟以获得较好的热加工工艺参数。
On the Gleeble-3800 thermal simulator, the F35MnVN non-quenched and tempered steel was subjected to two-pass compression experiments to obtain the stress-strain curves under different deformation conditions. The static recrystallization kinetics model was established according to the Avrami equation and the static recrystallization activation energy 178.2 kJ.mol-1. The single-pass compression experiments of F35MnVN non-quenched and tempered steel on the Gleeble-3800 thermal simulator were carried out (same as the double pass conditions). The microstructure of the samples was investigated and the static recrystallization grain size model was established. The results show that the experimental results agree well with the model predictions. This model can be applied to the numerical simulation of F35MnVN non-quenched and tempered steel in the hot deformation process to obtain better thermal processing parameters.