| 低[Al]s齿轮钢20CrMnTi的洁净度研究 |
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| 引用本文： | 王永胜,王新华,王万军. 低[Al]s齿轮钢20CrMnTi的洁净度研究[J]. 特殊钢, 2009, 30(3): 25-27 |
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| 作者姓名： | 王永胜 王新华 王万军 |
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| 作者单位： | 1北京科技大学冶金与生态工程学院，北京100083；2酒泉钢铁(集团)有限公司，嘉峪关735100) |
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| 基金项目： | 国家重点基础研究发展规划(973计划) |
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| 摘 要： | 80 t LD-LF-CC工艺生产齿轮钢20CrMnTi时,[Al]s从0.030%降至0.015%可使吨钢成本降低25.8元。为不影响钢水洁净度,转炉出钢严格挡渣,出钢加入2 kg/t钢芯铝,同时加入CaO≥70%、SiO2≤5%的高碱度渣进行渣洗,吹氩喂铝线使[Al]s为0.015%。LF精炼加入石灰块和AD粉(Al+Al2O3)对炉渣改质,然后喂Ca-Si线,软吹氩≥10 min。5炉试验结果表明,改进工艺后铸坯具有较高的洁净度,T[O](14～15)×10-6,[S] 0.012%～0.015%,[P]0.012%～0.018%。
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| 关 键 词： | 酸溶铝 齿轮钢20CrMnT LD-LF 洁净度 |
| 收稿时间： | 2008-11-21 |
A Study on Cleanliness of Gear Steel 20 CrMnTi with Low [Al] s |
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| Wang Yongsheng,Wang Xinhua,Wang Wanjun. A Study on Cleanliness of Gear Steel 20 CrMnTi with Low [Al] s[J]. Special Steel, 2009, 30(3): 25-27 |
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| Authors: | Wang Yongsheng Wang Xinhua Wang Wanjun |
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| Affiliation: | 1 School of Metallurgical and Ecological Engineering, University of Science and Technology, Beijing 100083 ；2 Jiuquan Iron and Steel (Group) Co Ltd, Jiayuguan 735100 |
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| Abstract: | With gear steel 20CrMnTi producing by 80 t LD-LF-CC process, as [Al] s decreases from 0. 030% to 0. 015% , the production cost per ton steel shall be decreased by 25. 8 yuan. In order to un-influence the cleanliness of liquid steel, in LD tapping the slag was strictly stopped, the 2 kg/t steel-clad aluminium was added with adding high basicity slag containing ≥70% CaO and ≤5% SiO2 to carry out slag washing, argon blowing and feeding aluminium wire to [ Al ] s 0. 015% , in LF refining, lime lump and AD powder ( Al + Al2O3) were added to modify slag ingredient, then feeding Ca- Si wire and soft-blowing argon for more than 10 min. Results by 5 heats test showed that with improved process, the cast billet had higher cleanliness with ( 14-15) x 10-6T [0] , 0. 012% 〜0. 015% [S] and 0. 012% -0. 018% [P]. |
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| Keywords: | LD-LF |
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