含Cu取向硅钢中第二相粒子析出演变行为研究  

Precipitation and Evolution Behavior of Second Phase Particles in Grain-oriented Silicon Steel with Cu

作　　者：李志超 党宁 江海涛[2] 夏振海 LI Zhi-chao;DANG Ning;JIANG Hai-tao;XIA Zhen-hai

机构地区：[1]北京科技大学钢铁共性技术协同创新中心,北京100083 [2]北京科技大学冶金工程研究院,北京100083 [3]北德克萨斯州大学材料科学与工程学院,美国丹顿市76203

出　　处：《材料工程》2017年第12期10-16,共7页Journal of Materials Engineering

基　　金：中央高校基本科研业务费专项资金资助项目(新教师基金TP-A3类;FRF-TP-15-063A3);US Army Research Laboratory(ARL)(ARLBAA_W911NF-12-R-0011-03-Mod_26MAR15)

摘　　要：使用场发射扫描电子显微镜(SEM)观察CGO硅钢制备过程中第二相粒子的析出行为及分布状态,统计粒子的平均尺寸、面密度及Zener因子。结果表明:试样中主要存在两种析出物,一种是(Cu,Mn)S复合析出物,尺寸为1μm左右,称为A类析出物,另一种是Cu_2S析出物,尺寸为10~30nm,称为B类析出物,Cu_2S起主要抑制作用。第二相粒子在热轧阶段大量弥散析出,平均粒子尺寸最小,面密度最高,高温退火前的加工阶段,粒子的平均尺寸不断增加,面密度逐渐降低;高温退火过程中,随着析出物体积分数的降低,其抑制能力呈下降趋势,960℃时析出物发生明显的聚集现象,当Zener因子A低于临界值0.19nm^(-1)时,二次再结晶发生,残留的粒子不会产生有效的抑制作用。The precipitation behavior and distribution of second phase particles in conventional grain-o-riented silicon steel during manufacturing process were observed by field emission scanning electron microscopy,and the average particle size,the areal particle density,and the Zener factor were statisti-cally analyzed.The results show that the samples mainly contain two kinds of precipitates:A class is the(Cu,Mn)S composite precipitates with the average size of1/j.m;B class is the Cu2S precipitates with the size of10-30nm,the key inhibition effect is produced by Cu2S.Hot rolling leads to a large a-mount of fine second phase particles precipitation,which has the minimum average particle size and the highest areal density;in the manufacturing process before high temperature annealing,the average particle size is increasing and the areal density is decreasing;in the process of high temperature annea-ling,with the decrease of volume fraction of precipitates,the inhibition ability exhibits reducing trend,obvious aggregation occurs at960oC,secondary recrystallization will happen when Zener factor A decreases below the critical value of0.19nm_1,and the residual particles will not produce valid in-hibition effect

关 键 词：CGO硅钢 抑制剂 第二相粒子 析出 

分 类 号：TG142.1[一般工业技术—材料科学与工程]