| 板坯中间裂纹产生原因及防止措施 |
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| 引用本文： | 宋勇军,胡纳新,刘连队,陈志敏,孙中强,代景鑫.板坯中间裂纹产生原因及防止措施[J].天津冶金,2012(3):7-8,18. |
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| 作者姓名： | 宋勇军 胡纳新 刘连队 陈志敏 孙中强 代景鑫 |
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| 作者单位： | 1. 天铁冶金集团热轧板有限公司,河北涉县,056404
2. 沈阳东北大学冶金技术研究所有限公司,沈阳,110004 |
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| 摘 要： | 针对天铁热轧1#板坯连铸机生产的板坯中间裂纹严重的问题,通过低倍检验分析形成板坯中间裂纹的影响因素。结果表明:拉坯速度、Mn/S比、设备辊缝精度与铸坯中间裂纹密切相关,其中设备精度是影响铸坯中间裂纹的主要因素;将拉速控制在0.85m/min,可以防止Q235B钢铸坯中间裂纹产生;当钢中Mn/S>90,普碳钢铸坯无中间裂纹产生;将辊缝偏差调整至0.3mm以下,可有效防止铸坯中间裂纹的产生。
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| 关 键 词： | 板坯 裂纹 拉速 设备 精度 |
Cause and Prevention Measure of Slab Central Crack |
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| Song Yongjun,Hu Naxin,Liu Liandui,Chen Zhimin,Sun Zhongqiang,Dai Jingxin.Cause and Prevention Measure of Slab Central Crack[J].Tianjin Metallurgy,2012(3):7-8,18. |
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| Authors: | Song Yongjun Hu Naxin Liu Liandui Chen Zhimin Sun Zhongqiang Dai Jingxin |
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| Affiliation: | 1.Hot Rolling Plate Mill, Tiantie Metallurgy Group, She County, Hebei Province 056404; 2.Shenyang Northeast University Metallurgy Technology Institute Company Limited, Shenyang, Liaoning Province 110004,China) |
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| Abstract: | In order to address the problem of serious central crack at Tiantie Hot Rolling Mill Slab Caster 1, macroscopic inspection is carried out to analyze the influential factors. Results indicate that casting speed, Mn/S ratio and roll gap precision are closely related to slab central crack, among them equipment precision is the main factor; casting speed less than 0.85 m/min can prevent central crack from forming at Q235B slab; no central crack of carbon slab forms with Mn/S >90; slab central crack can be effectively avoided with roll gap deviation under 0.3 mm. |
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| Keywords: | slab crack casting speed equipment precision |
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