Nb(C,N)沉淀析出动力学计算  

Nucleation kinetics of niobium carbo-nitride in microalloyed austenite

作　　者：曹慧泉[1] 李广敏[1,2] 颜慧成[1] 罗登[2] 夏政海[2] 林鹏[1] 仇圣桃[1] 干勇[1] 

机构地区：[1]钢铁研究总院先进钢铁流程及材料国家重点实验室,北京100081 [2]华菱集团湘潭钢铁有限公司,湖南湘潭650091

出　　处：《炼钢》2009年第5期48-51,共4页Steelmaking

摘　　要：对动力学模型进行了优化,对模型中的常数做了修正,引入界面能修正因子为0.38,推导出了动力学计算中的常数B的理论值为1.365×1010;对含Nb贝氏体钢980℃和950℃不同应变速率和应变量计算表明,随着应变速率和应变量的增加,析出时间是减少的,并且最快析出温度在930℃。The kinetics model is optimized and the constant in the model is revised and the interfacial energy modifier in the presence of boron is 0. 38. The derived value of constant B is 1. 365 × 1050 in the kinetic calculation. The different strain and different strain rate of the Nb bearing steel at 980 ℃ and 950 ℃ are calculated. Results show that with the increase of the strain and strain rate the precipitation time is reduced and the quickest precipitation juncture is at 930℃.

关 键 词：形核率 Zener-Hollomon参量 Nb(C N) 

分 类 号：TF031[冶金工程—冶金物理化学]