碳和氮含量对V(C,N)在形变奥氏体中析出的影响

来源期刊：钢铁2011年第3期

论文作者：方芳 尹云洋 雍岐龙

文章页码：60 - 65

关键词：含钒钢； 形变； 析出

Key words：V microalloyed steel； deformation； predipitation

摘    要：采用Thermo-Calc和经典动力学理论对2组碳、氮含量的中碳V-N微合金化钢分别进行了热力学和动力学分析,研究了V(C,N)在形变奥氏体中的析出规律。结果表明:在1 000~800℃温度区间变形时,形变储能ΔG_s的存在导致V(C,N)的形变诱导析出;当氮的质量分数增加0.005%时,V(C,N)的析出开始时间(5%析出量)缩短近1个数量级;当氮的质量分数较高时(大于0.01%),碳含量对V(C,N)在奥氏体中析出行为的影响几乎可以忽略。

Abstract: Two groups of medium V-N microalloyed steel with different carbon and nitrogen contents were calculated by Thermo-Calc and classical dynamic theories to predict the rules for V(C,N) precipitate in deformed austenite.The results indicate that,when deformed in a temperature range of 1 000-800 ℃ the existence of ΔG_s causes the strain induced precipitation of V(C,N);as nitrogen content increases by 0.005%,the precipitation-start time can be shorted by one order;when nitrogen content is more than 0.01%,the effect of carbon content on the behavior for V(C,N) precipitate in austenite can be neglected.