低碳、Ti-V复合微合金化钢的流变应力模型  

Flow Stress Modeling in Low Carbon Titanium-Vanadium Microalloyed Steel

作　　者：沈继程[1] 贾涛[1] 刘振宇[1] 

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2016年第5期638-641,667,共5页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(51204048);辽宁省教育厅科学研究一般项目(L2013112)

摘　　要：通过单道次压缩实验,研究了一种低碳、Ti-V复合微合金化钢在温度为1 173~1 373 K及应变速率为0.1~10 s-1条件下的奥氏体应力-应变行为;基于Akben等对溶质阻碍动态再结晶的量化研究工作,获得了本实验钢的近似的形变激活能Qdef及Zener-Hollomon参数;采用Jonas等的分析方法,计算得到回复参数r和r’、屈服应力σ0、饱和流变应力σsat和动态再结晶临界应力σc与Z参数的关系;获得了动态再结晶动力学,并最终建立流变应力数学模型.Using the single-pass compression experiment, the stress-strain behavior of austenite in a low carbon titanium-vanadium microalloyed steel was studied. The investigated temperature and strain rate were in a range of 1 173-1 373 K and 0. 1 - 10 s^-1, respectively. The deformation activation energy Qdef and Zener-Hollomon parameter were determined according to Akben＇ s work which quantified the drag effect of solutes on the dynamic recrystallization. Based on Jonas＇ analysis, the recovery parameters r and r＇ , yield stress σ0, saturation stress σsat, and the critical stress for dynamic recrystallization σc were formulated as functions of Z-parameter and then the kinetics for dynamic recrystallization was derived. Eventually, a flow stress model was established.

关 键 词：钛钒微合金钢 动态再结晶 流变应力 数学模型 单道次压缩 

分 类 号：TG111.5[金属学及工艺—物理冶金]