| 自耗电极冶金质量对G20CrNi2Mo轴承钢电渣锭洁净度的影响 |
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| 引用本文： | 李世健,成国光,苗志奇,陈列,姜新岩.自耗电极冶金质量对G20CrNi2Mo轴承钢电渣锭洁净度的影响[J].特殊钢,2018,39(6):6-10. |
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| 作者姓名： | 李世健 成国光 苗志奇 陈列 姜新岩 |
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| 作者单位： | 1北京科技大学钢铁冶金新技术国家重点实验室，北京100083 ；
2西宁特殊钢股份有限公司，西宁810005 |
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| 摘 要： | 研究了G20CrNi2Mo轴承钢电渣重熔过程自耗电极对电渣锭洁净度的影响。结果表明,电渣锭洁净度与自耗电极的冶金质量有较大的相关性。随着自耗电极氧含量的升高,电渣锭氧含量呈升高趋势。通过扫描电镜-能谱仪分析发现,氧含量较高的自耗电极中低熔点CaO-MgO-Al2O3夹杂物数量比低氧含量自耗电极的要多。由于低熔点夹杂物与钢液的界面能较低,限制了其在电渣重熔过程中的去除效率,从而导致电渣锭氧含量较高。通过电弧炉出钢高拉碳操作,氧含量低于0. 002 0%的锭子数量占到总量的90%以上。
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| 收稿时间： | 2018-05-20 |
Effect of Consumable Electrode Metallurgical Quality on Cleanliness of Bearing Steel G20CrNi2Mo ESR Ingot |
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| Li Shijian,Cheng Guoguang,Miao Zhiqi,Chen Lie,Jiang Xinyan.Effect of Consumable Electrode Metallurgical Quality on Cleanliness of Bearing Steel G20CrNi2Mo ESR Ingot[J].Special Steel,2018,39(6):6-10. |
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| Authors: | Li Shijian Cheng Guoguang Miao Zhiqi Chen Lie Jiang Xinyan |
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| Affiliation: | 1 State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083 ；
2 Xining Special Steel Co. , Ltd, Xining 810005 |
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| Abstract: | The effect of consumable electrode on ESR ingot cleanliness was investigated during electroslag remelting (ESR) of G20CrNi2Mo bearing steel. The results show that the ingot cleanliness is much correlated with that of electrode. The ingot oxygen content presents a rising trend with increasing electrode oxygen content. The SEM-EDS analysis reveals that the number density of low-melting-point CaO-MgO-Al2O3 inclusions in high oxygen-containing electrode is much larger than that in low oxygen-containing electrode. The low interfacial energy between low-melting-point inclusions and steel significantly limits the efficiency of inclusions removal, thus resulting in relatively high ingot oxygen content. With increasing carbon content before EAF tapping, the number of ingots less than 0.002 0% oxygen occupies total more than 90%. |
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