高锰TRIP钢热变形行为研究  

Hot Deformation Behavior of High-Manganese TRIP Steel

作　　者：张维娜[1] 刘振宇[1] 王国栋[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110004

出　　处：《东北大学学报（自然科学版）》2010年第11期1582-1585,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(50874131)

摘　　要：通过单轴压缩实验,研究了高锰TRIP钢(Fe15Mn3Si3Al)在800～1050℃温度范围内、应变速率ε.=0.01～5.0s-1条件下的热变形行为和组织变化,讨论了热变形参数对流变应力和显微组织的影响.结果表明:动态再结晶只在较高变形温度和低应变速率下发生.实验钢对温度和应变速率都很敏感,而应变速率对实验钢的热变形行为影响较大.高锰TRIP钢的表观应力指数n=3.909,变形激活能Q=353.167kJ/mol.根据实验数据,建立了高锰TRIP钢高温变形的热加工方程.The hot deformation behavior and microstructure evolution of high-manganese TRIP （transformation induced plasticity） steel（Fe15Mn3Si3Al） were investigated via hot compression test in a temperature range from 800 to 1 050 ℃ and strain rate ranging from 0.01 to 5.0 s-1. The effects of temperature,strain rate and true strain on the flow behavior and microstructure of the steel were discussed. The results showed that the dynamic recrystallization occurs only at higher temperature and lower strain rate. Hot deformation behavior of the steel specimens is sensitive to temperature and strain rate,while the strain rate affects the hot deformation behavior greatly. The apparent stress exponent and the apparent activation energy of the specimens are 3.909 and 353.167 kJ/mol,respectively. With the experimental data,the hot working equation of the steel is given.

关 键 词：高锰TRIP钢 热变形 微观组织 动态再结晶 

分 类 号：TG142.3[一般工业技术—材料科学与工程]