【作者】 梁新增； 衣海龙； 朱伏先；

【Author】 Liang Xinzeng;Yi Hailong;Zhu Fuxian;The State Key Laboratory of Rolling & Automation, Northeastern University;

【机构】 东北大学轧制技术及连轧自动化国家重点实验室；

【摘要】 采用Gleeble-1500热模拟实验机对Cr含量不同的钒氮微合金钢进行了单道次压缩实验,研究了变形温度为850¹100℃、应变速率为0.01¹s^-1的动态再结晶行为。研究表明:实验钢的动态再结晶行为在较高温度和较低应变速率下更容易发生;且Cr含量越高,越易发生动态再结晶;对应力应变曲线处理得到的θ-σ曲线都出现拐点特征,且?θ/?σ-σ曲线都相应出现最值点,该最值点即为临界应变;建立动态再结晶数学模型。更多还原

【Abstract】 The Gleeble-1500 thermal simulation experiment was used to study the dynamic recrystallization behavior of the vanadium-nitrogen microalloyed steel with different Cr content. The dynamic recrystallization behavior was studied at the deformation temperature of 850¹100 ℃ and the strain rate of 0.01¹ s^-1. The results show that the dynamic recrystallization behavior of experimental steels is more likely to occur at higher temperatures and lower strain rates. The higher the Cr content is, the more likely the dynamic recrystallization occurs. The θ-σ curves obtained by the stress-strain curve Inflection point characteristics, and ?θ/?σ-σ curves corresponding to the most significant point, the most point is the critical strain; the establishment of dynamic recrystallization mathematical model.更多还原