利用Gleeble-2000热/力模拟实验机模拟了柔性化薄板坯连铸连轧(FTSR)生产线轧制低碳含Nb钢的动态软化行为. 根据不同Nb含量试样在不同变形温度下的应力-应变曲线, 得出Nb含量对动态再结晶数学模型中各参数的影响规律.结果表明: 随Nb含量的增加, 动态再结晶激活能逐渐增加, 且高于传统流程的动态再结晶激活能; 随Nb含量的增加, 模型参数中A值线性增加, Avrami指数m线性减小, n值线性增加, B值逐渐增加, 动态再结晶变得困难. 所计算的动态再结晶率以及峰值应力与实测的结果吻合良好.
Dynamic recrystallization action for Nb bearing steel on flexible thin slab rolling has been investigated by Gleeble-2000 thermal/mechanical simulation tester. Considering the effect of Nb content, modelling of dynamic recrystallization have been studied. Research results show that with the increasing of Nb content, (the activation energy of dynamic recrystallization) increase and the value of is higher than that of the traditional hot strip rolling. With the increasing of Nb content, the value of A and n increases linearly, the value of m decreases linearly and the value of B increases. The calculated and experimental results are in good agreement. That is, the modelling of dynamic recrystallization can simulate the dynamic softening action for Nb bearing steel on flexible thin slab rolling and provide the direction for rolling technique.
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| [3] | |
| [4] | |
| [5] | |
| [6] |
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