10Ti钢高温变形流变应力模型及晶粒大小变化  

MATHEMATICAL MODEL OF FLOW STRESS AND CHANGES OF GRAIN SIZE OF 10Ti STEEL IN HIGH TEMPERATURE DEFORMATION

作　　者：徐有容[1] 侯大华[1] 王德英[1] 郁韶荣[1] 许华平[1] 罗德信[1] 钟定忠[1] 

机构地区：[1]上海大学,武汉钢铁公司

出　　处：《钢铁》1995年第3期33-38,共6页Iron and Steel

基　　金：国家自然科学基金

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.

关 键 词：10Ti钢 高温变形 流变应力模型 钛钢 晶粒大小 

分 类 号：TG115.53[金属学及工艺—物理冶金]