取向硅钢奥氏体中AlN沉淀析出的动力学计算  

Kinetics of Precipitation for AlN in Austenite of Grain-oriented Silicon Steel

作　　者：刘磊 乔家龙 尹思博 胡金文 项利[1] 仇圣桃[1] Liu Lei;Qiao Jialong;Yin Sibo;Hu Jinwen;Xiang Li;Qiu Shengtao(Engineering and Research Center for Continuous Casting Technology,Central Iron and Steel Research Institute,Beijing 100081,China;State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100083,China;College of Metallurgical Engineering,Anhui University of Technology,Ma'anshan 243032,Anhui,China)

机构地区：[1]钢铁研究总院连铸技术国家工程研究中心,北京100081 [2]北京科技大学钢铁冶金新技术国家重点实验室,北京100083 [3]安徽工业大学冶金工程学院,安徽马鞍山243032

出　　处：《钢铁钒钛》2020年第2期158-162,共5页Iron Steel Vanadium Titanium

基　　金：国家重点研发计划(2016YFB0300305)。

摘　　要：利用第二相沉淀析出的理论计算了取向硅钢奥氏体中AlN沉淀析出的动力学,结果表明:AlN在奥氏体中不同形核机制的临界形核尺寸相同,且临界形核尺寸随着温度的升高而增加。AlN在晶界形核的临界形核功最小,相对形核率最大,开始析出时间最短。虽然均匀形核和位错形核的临界形核功相当,但是AlN均匀形核的相对形核率比位错形核大2~3个数量级,均匀形核的开始析出时间也比位错形核短,奥氏体中AlN的主要形核机制是晶界形核。The kinetics of precipitation of AlN in austenite of oriented silicon steel was calculated by the theory of second phase precipitation.The results show that the critical nucleation sizes of AlN in austenite under different nucleation mechanisms are identical and the critical nucleation size increases with the increase of temperature.The critical nucleation energy of AlN at grain boundary is the smallest,the relative nucleation rate is the largest and the precipitation time is the shortest.Although the critical nucleation energy of homogeneous nucleation and dislocation nucleation is equal,the relative nucleation rate of homogeneous nucleation of AlN is 2~3 orders larger than that of dislocation nucleation,and the initial precipitation time of homogeneous nucleation is also shorter than that of dislocation nucleation.The main nucleation mechanism of AlN in austenite is controlled by grain boundary nucleation.

关 键 词：取向硅钢 ALN 抑制剂 析出 

分 类 号：TF76[冶金工程—钢铁冶金]