摘要
采用MMS-300热/力模拟实验机,研究30Mn27Al4V无磁钢在变形温度900℃~1150℃、应变速率0.1s-1~10s-1条件下的热变形规律。结果表明,在热变形过程中,当变形温度为1000℃~1150℃、应变速率为0.1s-1~10s-1条件下,实验用钢均发生明显的动态再结晶。确定变形激活能为503.7kJ/mol以及Z参数,得到了30Mn27Al4V无磁钢的高温流变应力本构方程。根据实验数据回归,建立了该钢的高温塑性变形抗力数学模型。
The hot deformation behavior of 30Mn27Al4V non-magnetic steel at the strain rates of 0.1s-1~10s-1 and deformation temperatures of 900℃~1150℃ was studied by MMS-300 thermomechanical simulator.The results show that full dynamic recrystallization occurs at the strain rates of 0.1s-1~10s-1 and deformation temperatures of 1000℃~1150℃.The activation energy of the steel is 503.7kJ/mol for hot deformation.The Zener-Hollomon parameter was obtained.The constitutive equation and mathematic model of deformation resistance were also established.
出处
《塑性工程学报》
CAS
CSCD
北大核心
2012年第2期66-69,共4页
Journal of Plasticity Engineering
基金
国家自然科学基金资助项目(51174057
50534020)
关键词
无磁钢
热变形
变形抗力模型
本构方程
non-magnetic steel
hot deformation
deformation resistance model
constitutive equation