Research on Behavior of Non-metallic Inclusions in Non-oriented Silicon Steel During Refining Process
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摘要: 采用SEM-EDS等分析方法,分析了KR-BOF-RH-ASP流程生产无取向硅钢精炼过程非金属夹杂物的变化,并确定了夹杂物的主要来源。试验结果表明,RH处理后夹杂物以不规则形状的Al2O3为主,中间包试样中Al2O3类夹杂物大幅减少,而含CaS、MgO-Al2O3类的复合夹杂有所增加;各工位夹杂物尺寸多集中在0.5~3μm。Abstract: During the refining process,the transformation of non-metallic inclusions in non-oriented silicon steel produced by the process of KR-BOF-RH-ASP is analyzed using the methods of SEM-EDS and main sources of non-metallic inclusions are identified in this paper.The results show that the inclusions after RH process are mainly Al2O3 and sulfides at l μm;then in the tundish,the amount of Al2O3 in the sample remarkably decreases while compound inclusions containing CaS,MgO-Al2O3 and sulfides increase to a certain extent,sizes of inclusions in different working sections are mainly at 0.5~3 μm.
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Key words:
- non-oriented silicon steel /
- refining process /
- non-metallic inclusions /
- number /
- size distribution /
- SEM
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