微量钼对微合金钢动态再结晶的影响

钢铁研究学报, 2009, 21(1): 33-0.

微量钼对微合金钢动态再结晶的影响

1.1. 昆明理工大学材料与冶金学院, 云南昆明 650093；2. 中国钢研科技集团公司结构所, 北京100081； 3. 北京科技大学材料科学与工程学院, 北京100083

1.1. Faculty of Materials and Metallurgical Engineering，Kunming University of Science and Technology, Kunming 650093, Yunnan China

2.2. Institute for Structural Materials, Central Iron and Steel Research Institute, Beijing 100081, China

3.3. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

关键词：钼;动态再结晶;微合金钢

Effect of Microalloying Element Mo on Dynamic Recrystallization of Microalloyed Steels

XIE Zhixiang , LIU Qingyou , YANG Jinghong , GAN Guoyou

Keywords： Mo;dynamic recrystallization;microalloyed steel

通过NbVTi和NbVTiMo两种微合金钢在高温(td=900~1 100 ℃)和不同应变速率(=001~10 s-1)下的单道次压缩模拟试验，研究了热变形参数对两种微合金钢的动态再结晶过程的影响，求出动态再结晶形变激活能及相关参数，建立了热变形方程，并通过对比，分析了钼对微合金钢动态再结晶的影响。结果表明：含钼钢的动态再结晶更困难。这是因为钼的自扩散系数大，致使钢具有更高的动态再结晶激活能。

The specimens of NbVTi and NbVTiMo microalloyed steels were compressed at high temperature (900-1 100 ℃) and different strain rates ranging from 001 to 10 s-1 by using a Gleeble 2000 thermomechanical simulator. By analysing the curves of the flow stress and microstructure observation, the influence of thermomechanical treatment paramerters on the dynamic recrystallization (DRX) behavior of the steel has been investigated. It has been found that microalloying element Mo addition produces a retardation of dynamic recrystallization and grain growth as the solid solute drag effect.

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