中南大学学报（自然科学版）2016，Vol.47Issue(6)：1888-1895,8.DOI:10.11817/j.issn.1672-7207.2016.06.010
纯钛高温变形行为及其在精轧板中的应用
Hot deformation behavior of pure titanium and its application in hot sheet finish rolling
摘要
Abstract
The hot deformation behaviors of pure titanium TA1 were studied by thermal simulation experiment with deformation temperature of 700−800℃, strain rate of 1−20 s−1, and deformation degree of 60%. According to the true stress−true strain data obtained from thermal simulation experiment, the processing maps at strain of 0.3 and 0.6 were established to determine the optimum hot rolling temperature region, respectively, and a deformation resistance model based on the J−C model was developed and verified. The results show that the flow stress of TA1 decreases with the increase of the deformation temperature, while increases with the increase of the strain rate. The temperature and strain rate affect the deformation mechanism greatly. The deformation is mainly dynamic recovery when the temperature is 700 ℃and the strain rate is 1 s−1. The degree of dynamic recrystallization increases continuously with the increase of temperature and strain rate. The dynamic recrystallization is well-completed at the temperature of 800℃and the strain rate of 20 s−1, whose microstructure is homogeneous. The rolling effect is better using the deformation resistance model and controlling the temperature region effectively, and the rolled pure titanium sheet can meet the requirements of the national standard.关键词
纯钛/热变形/变形抗力/热加工图/热轧Key words
pure titanium/hot deformation/deformation resistance/hot processing map/hot rolling分类
矿业与冶金引用本文复制引用
李军,于辉,史庆南,刘利刚,任万波..纯钛高温变形行为及其在精轧板中的应用[J].中南大学学报（自然科学版）,2016,47(6):1888-1895,8.基金项目
国家自然科学基金资助项目(51275445)(Project(51275445) supported by the National Natural Science Foundation of China) （51275445）
