【摘要】 采用ASPEX自动扫描电镜和场发射扫描电镜,分析了不同铝、硅质量分数的无取向电工钢中的夹杂物和析出物的种类和形貌特征。采用FactSage热力学软件对夹杂物和析出物的形成进行了热力学分析。随着无取向电工钢中铝质量分数增加,氧化物类型转变规律为SiO₂-Al₂O₃-MnO→Al₂O₃→MgO·Al₂O₃。对于铝脱氧无取向电工钢,氮化物类型为多边形的AlN。钢中铝质量分数和AlN的平均尺寸之间符合以下公式:{d}_μm=3.75·[%Al]-0.57。随着铝质量分数增加,对耐火材料的侵蚀逐渐增强,钢中的镁质量分数逐渐增加。随着无取向电工钢中镁质量分数增加和硫含量降低,硫化物的转变规律为:（Mn,Cu）S→（Mn,Mg）S→MgS。更多还原

【Abstract】 In the current study,automatic scanning electron microscope and field emission scanning electron microscope were employed to analyze types and morphologies of inclusions and precipitates in non-oriented electrical steels.A thermodynamic software FactSage was conducted to analyze the inclusion formation behavior.With the increase of aluminum content,oxide inclusions changed with the the sequence of SiO₂-Al₂O₃-MnO→Al₂O₃→MgO·Al₂O₃.For Al-deoxidized non-oriented electrical steels,angular AlN was the dominative nitride.Besides,the relationship between the average size of AlN and Al content was {d}μm=3.75·[%Al]-0.57.The content of Mg increased with the increasing Al content.With the increase of magnesium content and the decrease of sulfur,sulfides changed with the sequence of（Mn,Cu）S→（Mn,Mg）S→MgS.更多还原