利用透射电镜和X射线衍射技术研究了一种低碳微合金钢中Nb、Ti碳氮化物的回溶行为.研究结果表明,随着加热温度的升高,保温时间的延长,第二相粒子发生回溶,第二相粒子的数量减少,尺寸也逐渐变细小.同时,粒子形貌由主要呈近球形逐渐变为主要呈方形.加热过程中,Nb和Ti的碳氮化物均会发生溶解,Nb的回溶速度要比Ti快.
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