| 中厚板尾部裂纹的分析与控制 |
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| 引用本文： | 李永强,李新东,侯刚.中厚板尾部裂纹的分析与控制[J].轧钢,2015,32(3):70-72. |
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| 作者姓名： | 李永强 李新东 侯刚 |
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| 作者单位： | 莱芜钢铁集团，a.郑州经贸有限公司 ; b.银山型钢有限公司宽厚板事业部，山东莱芜271104 |
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| 摘 要： | 针对莱芜钢铁集团银山型钢有限公司4 300mm宽厚板生产线在生产过程中出现的钢板尾部时常存在明显深度裂纹的问题,通过统计分析的方法对存在尾部裂纹的钢板进行工艺排查,找出其原因是由于除鳞水聚集在钢板尾部形成黑带,轧制时黑带处存在较大的张应力而引起开裂。对此通过调整上下辊速比和轧制线高度使钢板头尾保持平直,并控制除鳞水开启道次以避免钢板表面形成黑印,基本控制了该问题的发生。
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| 关 键 词： | 关键词：尾部裂纹 统计分析 工艺排查 |
| 收稿时间： | 2014-06-16 |
Analysis and control of the crack in plate tail |
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| LI Yong-qiang;LI Xin-dong;HOU Gang.Analysis and control of the crack in plate tail[J].Steel Rolling,2015,32(3):70-72. |
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| Authors: | LI Yong-qiang;LI Xin-dong;HOU Gang |
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| Affiliation: | a.Zhengzhou Economy and Trade Co.,Ltd. ; b.Heavy and Wide Plate Dept.,Yinshan Section Steel Co.,Ltd.,Laiwu Iron & Steel Group Co.,Laiwu 271104,China |
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| Abstract: | Aimed at the crack defects on the surface of plate end in 4 300 mm plate production line of Laiwu Iron & Steel Group Co.,the cause was analyzed by statistical analysis technology,and found that descaling water assembling on the plate tail surface made its temperature down,and caused the crack defects.These defects were avoided by the measures of adjusting the rolling line elevation and the speed ratio of two rolls,and optimizing descaling water usage. |
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| Keywords: | Keywords: tail crack statistical analysis technology Process screen |
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