| GCr15轴承钢冶炼过程钢液洁净度变化 |
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| 引用本文： | 杨光维,郝鑫,杨叠,王新华,黄福祥,王万军.GCr15轴承钢冶炼过程钢液洁净度变化[J].钢铁,2014,49(11):31-35. |
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| 作者姓名： | 杨光维 郝鑫 杨叠 王新华 黄福祥 王万军 |
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| 作者单位： | 北京科技大学冶金与生态工程学院， 北京 100083 |
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| 基金项目： | 国家重点基础研究发展计划资助项目(2010CB630806)；国家自然科学基金资助项目 |
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| 摘 要： | 研究了EAF→LF→VD→软搅→CC工艺生产GCr15轴承钢冶炼过程钢中TO]及非金属夹杂物的变化情况。通过将电炉出钢碳质量分数控制为0.2%～0.4%、出钢加铝强脱氧及造预精炼渣、LF精炼过程造高碱度强还原性炉渣、VD真空强搅拌及防止中间包二次氧化，可以生产w(TO])]等于8×10－6的轴承钢。在炉外精炼过程中夹杂物经历了Al2O3→MgO·Al2O3→CaO-MgO-Al2O3演变。LF精炼过程夹杂物平均尺寸减小，经过VD真空处理后尺寸增加，接着在软搅和中间包过程继续减小。利用VD真空处理可以去除高达74%的夹杂物。
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| 关 键 词： | GCr轴承钢 夹杂物 T[O] AlO AlO·MgO CaO-MgO-AlO |
| 收稿时间： | 2013-11-13 |
Cleanliness of GCr15 Bearing Steel During Steelmaking Process |
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| YANG Guang-wei,HAO Xin,YANG Die,WANG Xin-hua,HUANG Fu-xiang,WANG Wan-jun.Cleanliness of GCr15 Bearing Steel During Steelmaking Process[J].Iron & Steel,2014,49(11):31-35. |
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| Authors: | YANG Guang-wei HAO Xin YANG Die WANG Xin-hua HUANG Fu-xiang WANG Wan-jun |
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| Affiliation: | School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China |
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| Abstract: | TO] and inclusions during EAF→LF→VD→Purging→CC process were investigated on GCr15 bearing steel. Through controlling carbon content at EAF tapping from 0.2% to 0.4%, adding aluminum and flux during tapping for deoxidation and pre-refining, making high basicity slag with little (TFe+MnO) content during LF refing, stirring the steel in VD and preventing steel reoxidation in tundish, bearing steel with w(TO])=8×10－6] can be produced. Inclusions changed in order of Al2O3→MgO·Al2O3→CaO-MgO-Al2O3 during the secondary refining process. The average size of inclusions decreased after ladle refining, while picked up after vacuum treatment, and continously decreased during purging and in tundish. Inclusion number can be reduced by 74% through VD process. |
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| Keywords: | GCr15 bearing steel inclusion T[O] Al2O3 Al2O3·MgO CaO-MgO-Al2O3 |
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