E36船板钢动态再结晶行为研究

Research on Dynamic Recrystallization Behavior of E36 Ship Plate Steel

利用MMS-200热模拟试验机对E36船板钢进行单道次压缩试验,研究了试验钢在变形温度850~1100℃,应变速率为0.01~1s^(-1)条件下的动态再结晶行为。结果表明,E36船板钢在变形过程中发生了动态再结晶,且随着变形温度的升高和应变速率的降低,动态再结晶越易发生。通过计算得到的试验钢的变形激活能为373.78kJ/mol,并由此建立了试验钢的本构方程及动态再结晶临界应变模型,为试验钢热变形工艺参数的制定提供了理论支持。

Dynamic recrystallization behavior of E36 ship plate steel was studied by means of single-pass compression tests on MMS-200 thermo-simulation machine at temperature of 850 ℃ to1 100 ℃ and strain rate of 0. 01 s^（-1） to 1. 00 s^（-1）. The results showed that dynamic recrystallization occurred for E36 ship plate steel during deformation,and higher deformation temperature and smaller strain rate rendered the dynamic recrystallization easier. The dynamic recrystallization activation energy of E36 steel calculated was 373. 78 k J/mol,and in view of the above the constitutive equation and dynamic recrystallization critical strain model was also set up,which could provide theoretical support for the development of hot deformation process parameters.