摘要
利用TMTS热物理模拟机对18MnD5钢试样进行等温恒应变速率热压缩实验,获得材料流变应力和微观组织演变规律。通过分析Zener-Hollomon参数与峰值应变、稳态应变、发生50%动态再结晶时的应变及动态再结晶晶粒尺寸之间的关系,对实验结果进行修正,排除误差较大的实验数据。采用修正后的数据建立高精度的18MnD5钢动态再结晶模型,并利用Deform软件对18MnD5钢进行微观组织演变的模拟分析。
In order to determine the flow stress and microstructure evolution of 18MnD5 steel, the hot compression test at isothermal constant strain rate is carried out by TMTS thermal physical simulation machine. By analyzing the functional relationship among the Zener-Hollomon parameter with peak strain, steady strain, strain of 50% dynamic re- crystallization, grain size of dynamic recrystallization, the original experiment data have been corrected and the large error experimental data have been excluded. The high precision dynamic recrystallization model of 18MnD5 steel has been established by applying corrected data and the microstructure evolution simulation of 18MnD5 steel has been ana- lyzed by Deform software.
出处
《大型铸锻件》
2013年第2期4-6,共3页
Heavy Casting and Forging
