结晶器电磁搅拌对IF钢连铸坯表层纯净度的影响

钢铁研究学报, 2011, 23(10): 15-19.

结晶器电磁搅拌对IF钢连铸坯表层纯净度的影响

1.1. 北京科技大学冶金与生态工程学院, 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>

1.1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing,Beijing 100083, China 2. State Key Laboratory for Advanced Metals and Materials, University ofScience and Technology Beijing, Beijing 100083, China>

基金项目: 国家自然科学基金

关键词： IF钢 , continuous casting slab , M-EMS , blow hole defect , non-metallic inclusion

Effects of M-EMS on Surface Cleaniness of IF Steel Slab

HU Zhao-fan1 , ZHANG Jiong-ming1 , CAI Zhen2 , YUAN Yang-yang1 , CHEN Shao-dong1

Keywords： IF steel , 连铸坯 , 结晶器电磁搅拌 , 皮下气泡 , 非金属夹杂物

应用扫描电镜分析、能谱分析和显微镜技术等分析手段，研究了结晶器电磁搅拌对IF钢铸坯表层纯净度的影响。结果表明：结晶器电磁搅拌可有效改善铸坯表面质量，使铸坯表层皮下气泡和显微夹杂物显著减少；IF钢铸坯中夹杂物主要是Al2O3、TiN和Al2O3-TiN、Al2O3-Ti2O3、Al2O3-Ti2O3-TiN型复合夹杂物；铸坯表层皮下气孔在铸坯宽度和厚度方向上均呈非均匀分布，气泡直径主要分布在50~350μm之间。

Effects of M-EMS on surface cleaniness of IF steel slab were investigated by means of SEM, EDS and microscopic techniques, etc. The results indicate that M-EMS can improve surface cleanliness and reduce inclusions, blow hole defects effectively. Al2O3, TiN and Al2O3-TiN, Al2O3-Ti2O3, Al2O3-Ti2O3-TiN are main inclusions in the slab. The distribution of bubbles in slabs is non-homogeneous in respect of width and depth, the bubble size range of 50 to 350μm.

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