彭宁琦,唐广波,刘正东,雍岐龙

• 1:钢铁研究总院结构材料研究所

摘要(Abstract)：

以微合金元素的析出热力学和析出动力学为基础,针对Fe-Nb-V-Ti-Al-C-N合金系,定量计算了热连轧过程中(Nb,V,Ti)(C,N)和AlN在奥氏体中的析出行为,并进一步分析了热轧制温度对析出行为的影响。计算结果表明,对所研究的钢种成分和工艺条件,在加热过程中(Nb,V,Ti)(C,N)就已经析出,在粗轧阶段,(Nb,V,Ti)(C,N)析出粒子平均半径逐渐减小,在精轧阶段,(Nb,V,Ti)(C,N)基本达到平衡析出量,终轧后析出粒子平均半径保持在23 nm左右。轧制时的热变形增大了形核率,促进了析出,使析出粒子的平均半径减小。随加热和轧制温度的降低,(Nb,V,Ti)(C,N)的析出量有所增加,粒子平均半径减小。

关键词(KeyWords)： 微合金钢;碳氮化物;析出;热力学;动力学

Abstract:

Keywords:

基金项目(Foundation): 国家“十一五”科技支撑计划资助项目(2006BAE03A08和2006BAE03A04)

作者(Author): 彭宁琦,唐广波,刘正东,雍岐龙

DOI: 10.13289/j.issn.1009-6264.2011.06.029

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