摘要
利用热模拟压缩试验测定了不同钒含量的钒微合金化低碳钢在 900~1 000℃温度区间和0 1~1s-1变形速率范围内的真应力-真应变曲线。对曲线的分析表明: 随钢中钒含量的增加, 低碳钢的动态再结晶开始时间延长, 变形奥氏体的动态再结晶名义激活能提高. 实验钢薄膜试样的TEM观察表明, 钢中的微量钒以固溶态存在于奥氏体中, 微量的固溶钒对奥氏体动态再结晶起到抑制作用.
The hot compression tests for two vanadium microalloyed low carbon steels were carried out using Gleeble-1500 thermal simulator in the temperature range of 900~1000℃ and strain rates of 0.1~1s^(-1). The true stress-true strain curves of test steels during hot compression were measured. The results show that the starting time of dynamic recrystallization was delayed and the nominal activation energy of dynamic recrystallization was increased with increasing the vanadium content in low carbon steels. No carbonitrides of vanadium were observed by TEM in vanadium microalloyed steels, which suggested that vanadium has been dissolved in the matrix. It can be concluded that dissolved vanadium restrains the dynamic recrystallization of austenite during high temperature deformation.
出处
《材料与冶金学报》
CAS
2005年第1期51-54,共4页
Journal of Materials and Metallurgy
基金
中国金属学会-国际钒委员会资助项目.
关键词
钒微合金化低碳钢
高温变形
奥氏体
动态再结晶
名义激活能
vanadium microalloyed steel
high temperature deformation
austenite
dynamic recrystallization
nominal activation energy
