一重技术
一重技術
일중기술
CFHI TECHNOLOGY
2015年
4期
61-64
,共4页
SA508GR.3钢%热压缩变形%动态再结晶%加工图
SA508GR.3鋼%熱壓縮變形%動態再結晶%加工圖
SA508GR.3강%열압축변형%동태재결정%가공도
SA508GR.3 steel%hot compressive deformation%dynamic recrystallization%processing map
采用Gleeble-1500D热/力模拟试验机研究SA508GR.3钢在应变速率为0.01~1 s-1、变形温度为900~1100℃条件下的热变形行为。讨论变形温度和应变速率对流变应力的影响规律，并获得SA508GR.3钢的热变形激活能和热变形本构方程。基于动态材料模型，建立起SA508GR.3钢的加工图，研究发现SA508GR.3钢的功率耗散效率η在0.1~0.5之间，当功率耗散效率η高于0.3时，在1050~1100℃的区间内，将发生动态再结晶。
採用Gleeble-1500D熱/力模擬試驗機研究SA508GR.3鋼在應變速率為0.01~1 s-1、變形溫度為900~1100℃條件下的熱變形行為。討論變形溫度和應變速率對流變應力的影響規律，併穫得SA508GR.3鋼的熱變形激活能和熱變形本構方程。基于動態材料模型，建立起SA508GR.3鋼的加工圖，研究髮現SA508GR.3鋼的功率耗散效率η在0.1~0.5之間，噹功率耗散效率η高于0.3時，在1050~1100℃的區間內，將髮生動態再結晶。
채용Gleeble-1500D열/력모의시험궤연구SA508GR.3강재응변속솔위0.01~1 s-1、변형온도위900~1100℃조건하적열변형행위。토론변형온도화응변속솔대류변응력적영향규률，병획득SA508GR.3강적열변형격활능화열변형본구방정。기우동태재료모형，건립기SA508GR.3강적가공도，연구발현SA508GR.3강적공솔모산효솔η재0.1~0.5지간，당공솔모산효솔η고우0.3시，재1050~1100℃적구간내，장발생동태재결정。
The true stress-strain curves of SA508GR.3 steel are obtained through isothermal compression tests on a Gleeble-1500D thermal-mechanical simulator. The effect of temperature and strain on the flow stress is discussed and the hot deformation constitutive equation and deformation activation energy are applied to model the peak stress. A processing map of SA508GR.3 steel is developed on the principles of dynamic material modeling. The efficiency of power dissipation valueηof SA508GR.3 steel is between about 0.1~0.5, when the power dissipation of the power dissipation map efficiency greater than 0.3 and temperature range between 1 050℃and 1 100℃, dynamic recrystallization will occur.
