Nb-V-Ti低碳合金钢的流变失稳问题及图像辅助分析  

Rheological Instability Problem of Low-Carbon Alloy Steel Nb-V-Ti and Image-Aided Analysis

作　　者：戚爽[1] 郑睿颖[2] 

机构地区：[1]长春金融高等专科学校,吉林长春130028 [2]江西科技师范大学材料与机电学院,江西南昌310031

出　　处：《铸造技术》2015年第7期1656-1658,共3页Foundry Technology

基　　金：吉林省教育厅"十二五"科学技术研究项目"基于改进的关键点间相对距离的掌纹识别系统的设计与开发"(吉教科合字2015第447号)

摘　　要：研究了Nb-V-Ti低碳微合金钢的流变行为，并基于动态模型建立了该钢的加工图。结果表明，热变形流变应力对变形温度以及应变速率很敏感，温度越高、应变速率越低时流变应力越低，越容易发生动态再结晶。当温度在1008～1150℃范围、应变速率在0．13-3．16区域时，可以获得等轴的完全动态再结晶组织。The flow behavior of the low-carbon alloy steel Nb-V-Ti was investigated, and the processing figure of the steel was established based on dynamic model. The results show that the flow stress during hot deformation is sensitive to the deformation temperature and strain rate. The flow stress decreases with the increase of the temperature and the decrease of the strain rate, and dynamic recrystallization becomes easy. The equiaxial completed dynamic recrystallization microstructures can be obtained when the temperature is 1 008-1 150 ℃ and the strain rate is 0.13-3.16.

关 键 词：流变应力 应变速率 动态再结晶 

分 类 号：TG142.1[一般工业技术—材料科学与工程]