摘要
以细晶高强IF钢汽车板为研究对象,在MMS-300热力模拟实验机上,测定了在变形温度为950、900℃时,变形速率分别为0.1、0.5、1、5和10 s-1的应力应变曲线。结果表明,IF钢在950及900℃变形时,应力应变曲线为动态回复型,流变应力随着变形速率的增加而增加;在两种变形温度下,变形速率为0.1、0.5 s-1时对流变应力的影响差异较大。同时通过显微组织观察可发现,随变形速率的提高晶粒变细。
The fine-grain and high-strength 1F steel was studied. The strain-stress curves were draw on MMS-300 thermal mechanical simulator at the deformation temperature of 950,900℃ and strain rate of 0.1, 0.5, 1, 5, 10s^-1. The results show that the stress-strain curves of the fine-grain and high strength IF steel are the model of dynamic recovery. The flow stress increases with the increase of strain rate. When strain rate is 0.1 s^-1 and strain amount is 0.5 s^-1, the difference of influence on the stress is larger. The microstructure observation results show that the ferrite grain becomes finer with the increase of strain rate.
出处
《热加工工艺》
CSCD
北大核心
2008年第14期47-49,共3页
Hot Working Technology
关键词
细晶高强汽车板
热模拟
再结晶
应力-应变曲线
fine-grain and high-strength IF steel
thermal simulation
recrystallization
strain-stress curve
