取向电工钢加工过程中第二相粒子的析出行为  

Precipitation behaviors of second-phase particles in grain-oriented electrical steels during manufacturing processes

作　　者：李阳[1] 毛卫民[1,2] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]北京科技大学新金属材料国家重点实验室,北京100083

出　　处：《北京科技大学学报》2011年第4期439-443,共5页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金资助项目(No.50871015);冶金工程研究院基础理论研究基金资助项目(YJ2010--005)

摘　　要：利用场发射扫描电镜观察了以MnS为主要抑制剂的普通取向电工钢加工过程中第二相粒子的分布状态,统计了粒子面密度、平均尺寸以及相应的尺寸分布.结果显示,热轧加工造成了大量第二相粒子弥散、细小地析出,同时基体仍保持过饱和状态.冷轧变形会造成第二相粒子的回溶行为,而基体的过饱和状态会减弱回溶现象.中间退火与脱碳退火过程中会同时存在新粒子的形核及已析出粒子的粗化两个过程,而在最终二次再结晶升温阶段则以第二相粒子明显粗化为主.The distribution of second phase particles in conventional grain-oriented electrical steels during manufacturing processes with MnS as inhibitors was observed by field emission scanning electron microscopy,while the areal particle density,the average particle size and the corresponding size distribution were statistically determined.It is indicated that hot rolling leads to dispersive precipitation of a large amount of fine second phase particles and the matrix keeps a supersaturated state further.Certain dissolution behaviors of second phase particles can be induced by cold rolling,in which the supersaturated state may reduce the dissolution.The precipitation nucleation of new particles and the coarsening of the particles coexist during the intermediate annealing and decarburizing annealing processes,after which the second-phase particles experience predominately the coarsening process during the final temperature rising stage of secondary recrystallization annealing.

关 键 词：取向电工钢 第二相粒子 析出 抑制剂 

分 类 号：TG111.7[金属学及工艺—物理冶金] TM275[金属学及工艺—金属学]