摘要
为了研究高温变形参数对热轧纯钛卷精轧段高温变形行为的影响,利用Gleeble-3800热模拟机对纯钛进行高温热压缩试验。根据热轧纯钛卷精轧过程的轧制工艺要求,考虑变形温度范围为700-800℃,应变速率范围为0.01-10 s^-1,变形量为80%。结果表明：纯钛的流变应力随变形温度升高而降低,随应变速率升高而升高;在700-775℃时发生了动态回复,在800℃下且应变速率小于1 s^-1时还会发生动态再结晶。基于Arrhenius双曲正弦模型,利用线性回归方法建立了纯钛的本构方程,为纯钛的数值模拟和热加工工艺的制定提供了理论基础。
In order to study the effect of high temperature deformation parameters on the high temperature deformation behaviors of hot rolled pure titanium tape in finish rolling process,Gleeble- 3800 thermal simulation machine was employed to the high temperature compressive test of pure titanium. According to the finishing process parameters for hot rolling pure titanium,hot compression temperature was set at the range of 700 - 800℃,strain rate was determined at the range of 0. 01 - 10 s^-1and the deformation degree was 80%. The results show that the flow stress of pure titanium decreases with the increasing deformation temperature and increases with the increasing strain rate,dynamic recovery occurs at 700 - 775 ℃ and dynamic recrystallization happens only under the condition of 800 ℃ and less than 1 s^-1of strain rate. Based on the hyperbolic sine Arrhenius model,the constitutive equation of pure titanium was established by use of linear regression method,which provided a theoretical basis for the numerical simulation and thermal processing of pure titanium.
出处
《钢铁钒钛》
CAS
北大核心
2015年第1期32-37,共6页
Iron Steel Vanadium Titanium
关键词
纯钛
精轧
热压缩
动态再结晶
本构方程
pure titanium
finishing rolling
hot compression
dynamic recrystallization
constitutive equation
