| 热轧带钢冷弯开裂原因分析 |
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| 引用本文： | 耿绍卿,魏跃军,罗波,李建志,张召峰. 热轧带钢冷弯开裂原因分析[J]. 河北冶金, 2017, 0(5). DOI: 10.13630/j.cnki.13-1172.2017.0506 |
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| 作者姓名： | 耿绍卿 魏跃军 罗波 李建志 张召峰 |
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| 作者单位： | 1. 河钢集团承钢公司板带事业部,河北承德,067002;2. 河北省钒钛工程技术研究中心,河北承德067002;河钢集团承钢公司技术中心,河北承德067002 |
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| 摘 要： | 冷弯性能是衡量钢材塑性好坏的一项重要的力学性能指标,并且直接影响产品质量和经济效益。针对某厂Q235B、SS400钢种出现的冷弯不合格情况,通过采用金相分析和扫描电镜检测,认为热轧带钢冷弯开裂与钢材中心存在偏析带、团状珠光体和大量的魏氏体组织有关。严格控制连铸钢水过热度在20~30℃以内,铸坯入炉温度500℃,在炉时间≤180 min等工艺参数后,基本消除了热轧带钢冷弯开裂现象。
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| 关 键 词： | 热轧带钢 冷弯开裂 偏析带 团状珠光状 魏氏体 |
CAUSES ANALYSIS OF COLD BENDING CRACKING OF HOT ROLLED STRIP STEEL |
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| Geng Shaoqing,Wei Yuejun,Luo Bo,Li Jianzhi,Zhang Shaofeng. CAUSES ANALYSIS OF COLD BENDING CRACKING OF HOT ROLLED STRIP STEEL[J]. Hebei Metallurgy, 2017, 0(5). DOI: 10.13630/j.cnki.13-1172.2017.0506 |
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| Authors: | Geng Shaoqing Wei Yuejun Luo Bo Li Jianzhi Zhang Shaofeng |
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| Abstract: | Cold bending performance is one of the important mechanical properties on measuring steel plasticity, and has a direct impact on product quality and economic benefits.Aiming at the cold bending failure of Q235B、SS400 steel in a certain factory, it is believed that the cold bending cracking of hot rolled strip is related with segregated band, agglomerate pearlite and a large number of widmanstatten structure in central part, by means of metallographic analysis and SEM test.The cold bending cracking phenomenon is basically eliminated by means of strictly controlling the superheat of casting molten steel at 20 ~ 30 ℃, billet charging temperature less than 500 ℃, time in the furnace less than or equal to 180 min. |
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| Keywords: | hot rolled strip cold bending cracking segregated band agglomerate pearlite widmanstatten |
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