采用Gleeble1500热模拟机对不同钒-氮含量的微合金钢进行了热模拟实验,并对析出物的量进行了理论计算,观察了不同成分、温度、应变量对再结晶的影响,并与铌微合金钢进行了比较。结果表明,随着钢中V-N含量的增加,实验钢中奥氏体的再结晶被逐渐抑制;随着变形温度的降低,再结晶倾向也逐渐减小。但是与含Nb钢相比,再结晶趋势较大,主要原因是V-N钢与Nb钢的析出动力学的不同,Nb钢中Nb（CN）由于应变诱导可迅速析出,从而抑制了再结晶的发生,而钒氮钢中V（CN）的析出较慢,不能快速抑制再结晶的发生。
Theoretical calculations and thermal simulation on V-N microalloyed steels were carried out and influence of V and N content,temperature and strain on the static recrystallization of austenite was investigated.The results show that with increasing of nitrogen and vanadium content and decreasing of deformation temperature,static recrystallization of austenite is suppressed gradually.Compared with niobium microalloyed steel,the V-N microalloyed steels trend foward austenite recrystallization and the different precipitation kinetics of Nb(CN) and V(CN) carbides in the two types of steels should be responsible for the different recrystallization behavior.Nb(CN) in the niobium steel can precipitate rapidly,and so austenite recrystallization can be suppressed effectively.In contrast,precipitation rate of V(CN) carbides in the V-N steel is more slower and thus effect of nitrogen and vanadium on austenite recrystallization is weaker.
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