摘要
用热模拟试验机在１１５０～８５０℃变形温度、６０～０．１ｓ￣（－１）变形速率条件下对１０Ｔｉ钢做恒温单道次压缩实验。得到变形激活能４２０ｋＪ／ｍｏｌ，应力指数１２和峰值前流变应力数学模型及临界应变、流变应力、峰值应力与Ｚ参数关系。随变形温度升高，应变速率下降，晶粒大小呈上升趋势。得到动态再结晶晶粒大小与Ｚ参数关系。
The isothermal single-stage compression tests of 10Ti steel have been carried out by using THERMECMASTORI-Z Simulator at the temperature range of 850 ℃ to 1150 ℃,strain rate range of 0.1s ￣(-1) to 60 s￣(-1).The deformation activation energy is 420 kJ/mol,and stress exponent is 12.The mathematical model of flow stress before peak in high temperature deformation,the dependence of the critical strain ε flow stress σ(ε=0.2)and the peak stress σ_P on Z parameter have been studied.The microstructure changes have also been studied by means of optical microscope. The results show that with the rising of the deformaton temperature and the falling of the strain rate,the grain size tends to increase,The dependence of dynamic recrystallization grain size D_r on Z is also obtained.
出处
《钢铁》
CAS
CSCD
北大核心
1995年第3期33-38,共6页
Iron and Steel
基金
国家自然科学基金
