| Nb-V微合金化H型钢BS55C表面裂纹成因分析 |
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| 引用本文： | 刘建华,包燕平,周杰,杜松林,李建中,汤寅波. Nb-V微合金化H型钢BS55C表面裂纹成因分析[J]. 特殊钢, 2006, 27(1): 45-47 |
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| 作者姓名： | 刘建华 包燕平 周杰 杜松林 李建中 汤寅波 |
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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马鞍山钢铁股份有限公司，马鞍山243002 |
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| 摘 要： | 分析了成分为(%):0.14~0.17C,0.45~0.55Si,1.25~1.45Mn,0.08~0. 10V,0.03～0.05Nb H 型 钢BS55C表面裂纹形成原因。结果表明，该钢凝固时纵裂的敏感性较大，700~950℃范围内的塑性较低，使H 型钢表面易产生裂纹。由168炉Nb-V微合金化H 型钢BS55C生产数据分析得出，采用LF精炼，控制钢中S≤ 0.015%、P≤0.020%,优化浇铸水口，采用弱二次水冷工艺，避免在700~900℃范围矫直，可有效减少Nb-V微 合金化H 型钢的表面裂纹
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| 关 键 词： | Nb-V微合金化 H型钢 表面裂纹 |
| 收稿时间： | 2005-07-15 |
| 修稿时间： | 2005-07-15 |
An Analysis on Surface Cracks Formation of H Beam of Nb-V Microalloying Steel BS55C |
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| Liu Jianhua,Bao Yanping,Zhou Jie,Du Songlin,Li Jianzhong,Tang Yinbo. An Analysis on Surface Cracks Formation of H Beam of Nb-V Microalloying Steel BS55C[J]. Special Steel, 2006, 27(1): 45-47 |
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| Authors: | Liu Jianhua Bao Yanping Zhou Jie Du Songlin Li Jianzhong Tang Yinbo |
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| Affiliation: | 1 School of Metallurgical and Ecological Engineering,University of Science and Technology,Beijing 100083;2 Maanshan Iron and Steel Co Ltd,Maanshan 243002 |
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| Abstract: | The causes of surface cracks formation of H beam of Nb-V microalloying steel BS55C-0. 14~0. 17C,0.45~0.55Si,1.25~1.45Mn,0.08～0. 10V,0.03～0.05Nb have been analyzed. The results showed that the steel was sensitive to longitudinal crack at solidification and its plasticity at 700~950 ℃ was lower,therefore,the cracks were easily produced at surface of H beam. Based on analysis of 168 heats production data of Nb-V microalloying steel BS55C,it was obtained that it was available to effectively decrease the surface cracks of H beam of Nb-V microalloying steel by using LF refining,controlling [s]≤0.015% and [P]≤0.020%,optimizing cast nozzle, adopting weak secondary water cooling and avoiding straightening at 700～900 ℃ |
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| Keywords: | Nb-V Microalloying H Beam Steel Surface Crack |
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