| CSP热轧板卷边部裂纹成因 |
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| 引用本文： | 赵长亮,孙彦辉,田志红,蔡开科,刘建华,成小军,吴光亮,周春泉.CSP热轧板卷边部裂纹成因[J].北京科技大学学报,2007,29(5):499-503. |
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| 作者姓名： | 赵长亮 孙彦辉 田志红 蔡开科 刘建华 成小军 吴光亮 周春泉 |
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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. 湖南华菱涟源钢铁有限公司,娄底,417000 |
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| 摘 要： | 用光学显微镜、扫描电镜、透射电镜和能谱分析等方法研究了涟钢CSP热轧板卷边部裂纹的成因.结果表明:连铸坯表面的深振痕是热轧板卷边部裂纹的起源,连铸坯角部过冷导致奥氏体晶界AlN的细小析出,加剧了连铸坯对裂纹的敏感性.连铸坯经过精轧机组的轧制后,连铸坯表面的横裂纹扩展成为热轧板卷的锯齿状裂纹,严重时会造成烂边或掉块.
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| 关 键 词： | CSP 热轧板卷 边部裂纹 成因 热轧板卷 卷边 裂纹成因 hot rolled causes cracking 掉块 严重 锯齿状 裂纹扩展 轧制 精轧机组 敏感性 晶界 奥氏体 过冷 角部 连铸坯 振痕 铸坯表面 |
| 修稿时间： | 2006-02-052006-08-28 |
Edge cracking causes of hot rolled strips produced by CSP |
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| ZHAO Changliang,SUN Yanhui,TIAN Zhihong,CAI Kaike,LIU Jianhua,CHENG Xiaojun,WU Guangliang,ZHOU Chunquan.Edge cracking causes of hot rolled strips produced by CSP[J].Journal of University of Science and Technology Beijing,2007,29(5):499-503. |
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| Authors: | ZHAO Changliang SUN Yanhui TIAN Zhihong CAI Kaike LIU Jianhua CHENG Xiaojun WU Guangliang ZHOU Chunquan |
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| Institution: | 1. Metallurgical and Ecological Engineering School, University of Science and Technology, Beijing 10083, China; 2. Lianyuan Steel, Loudi 417000, China |
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| Abstract: | The edge cracking causes of hot rolled strips produced by CSP were investigated by optical microscope (OM), scanning electron microscope (SEM), transmittion electron microscope (TEM) and energy-dispersive X-ray analysis (EDX). The results indicated that deep oscillations of thin slabs were the origin of the edge cracks of hot rolled strips and AlN precipitates around the prior austenite grain boundaries due to intensive cooling rate rendered the slabs more susceptible to cracks. After seven rolling stands, the transverse cracks of the slabs would propagate to serrated edge cracks, even drop-out type cracks of hot rolled strips. |
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| Keywords: | CSP hot rolled strip edge cracks cause |
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