杂质元素对0.90%Si无取向电工钢消除应力退火性能的影响  

The Microstructure and Magnetic Properties of Non-oriented Electrical Steel after Stress Relief Annealing

作　　者：杜军 夏雪兰[1] 裴英豪[1] DU Jun;XIA Xuelan;PEI Yinghao(Technical Center,Maanshan Iron and Steel Co.,Ltd,Anhui Ma'anshan 24300,China)

机构地区：[1]马鞍山钢铁股份有限公司技术中心,安徽马鞍山243000

出　　处：《电工材料》2021年第4期14-18,共5页Electrical Engineering Materials

摘　　要：对比分析了不同杂质元素∑(C+S+N+Ti)总含量下0.90%Si的无取向电工钢消除应力退火后的磁性能、显微组织,结果表明:消除应力退火前后,磁感B_(50)几乎不变,仅铁损P_(1.5/50)发生了较大变化;杂质元素含量为60 ppm的试验钢铁损最低,铁损下降率达到25.37%,杂质元素含量109 ppm的实验钢铁损最高,铁损下降率仅为11.34%。透射电镜检测分析表明分布在晶界处的夹杂物,特别是Ti(CN)及Ti(CN)+MnS/Cu_(x)S复合型夹杂物严重阻碍消除应力退火后晶粒的长大,导致铁损下降率较低。The microstructure and magnetic properties of non-oriented electrical steel with three different contents of harmful impurity elements∑(C+S+N+Ti)after stress relief annealing were detected and analyzed.The results show that the magnetic induction B_(50) were almost unchanged no matter making stress relief annealing or not,but the iron loss P_(1.5/50) had changed a lot.The iron loss was the lowest and the reduction rate reached 25.37%among three experimental steels with low content of impurity elements at∑(C+S+N+Ti)=60 ppm.On the contrary,the iron loss was the worst and the reduction rate was only 11.34%which had high content of impurity elements at∑(C+S+N+Ti)=109 ppm.Transmission electron microscopy analysis showed that fine inclusions distributed at grain boundaries,especially Ti(CN)and Ti(CN)+MnS/Cu_(x)S composite inclusions seriously hindered grain growth after stress relief annealing,resulting in a low reduction rate of iron loss.

关 键 词：无取向电工钢 消除应力退火 夹杂物 

分 类 号：TM275[一般工业技术—材料科学与工程] TG156[电气工程—电工理论与新技术]