| 409L不锈钢连铸浸入式水口结瘤分析和改进措施 |
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| 引用本文： | 郑宏光,陆斌,李实,王立江,陈旭. 409L不锈钢连铸浸入式水口结瘤分析和改进措施[J]. 特殊钢, 2006, 27(6): 50-51 |
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| 作者姓名： | 郑宏光 陆斌 李实 王立江 陈旭 |
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| 作者单位： | 宝山钢铁股份有限公司不锈钢分公司，上海200431 |
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| 摘 要： | 采用扫描电镜和X射线衍射法,分析了EAF-AOD-VOD精炼409L不锈钢(%:0.009～0.011C、11.36～11.63Cr、0.15～0.22Ti、0.0074～0.0112N)连铸水口结瘤的物相。结果表明:水口结瘤中的物相主要有TiO2和金属。喂钛线后吹氩搅拌过强时,由于钢水的二次氧化会显著增加钢中TiO2夹杂物的数量,导致结瘤层明显变厚。喂钛线后采用吹氩弱搅拌,能尽可能排除钢中TiO2夹杂物;同时应避免连铸时铸流二次氧化,从而减少水口结瘤的发生。
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| 关 键 词： | 409L不锈钢 TiO? 连铸 浸入式水口 结瘤 |
| 收稿时间： | 2006-05-27 |
| 修稿时间： | 2006-05-27 |
Analysis on Clogging of Submerged Entry Nozzle for 409L Stainless Steel Concasting and Improved Measure |
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| Zheng Hongguang,Lu Bin,Li Shi,Wang Lijiang,Chen Xu. Analysis on Clogging of Submerged Entry Nozzle for 409L Stainless Steel Concasting and Improved Measure[J]. Special Steel, 2006, 27(6): 50-51 |
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| Authors: | Zheng Hongguang Lu Bin Li Shi Wang Lijiang Chen Xu |
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| Affiliation: | Stainless Steel Branch,Baoshan Iron and Steel Co Ltd,Shanghai 200431 |
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| Abstract: | The phases of clogging of nozzle during concasting of 409L stainless steel(0.009～0.011C,11.36~ 11.63Cr,0. 15~0.22Ti,0.0074～0.0112N)melted by EAF-AOD-VOD refining has been analyzed by scanning electron microscope(SEM)and X- ray diffraction method. The results indicated that phases of clog in nozzle consisted of TiO₂ and metal;and with over strong argon stiring after titanium wire feeding the amount of TiO₂ inclusion obviously increased due to reoxidization of molten steel, it led to clog being obvious thickening. The clogging of submerged entry nozale decreased by using soft argon stiring after titanium feeding to remove TiO₂ inclusion in molten steel and avoiding reoxidization of cast strand. |
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| Keywords: | TiO2 |
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