| 攀钢板坯连铸机不同断面铸坯角部横裂纹分析 |
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| 引用本文： | 李菊艳,文光华,唐萍,黎建全,向成礼. 攀钢板坯连铸机不同断面铸坯角部横裂纹分析[J]. 北京科技大学学报, 2011, 33(3): 296-301 |
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| 作者姓名： | 李菊艳 文光华 唐萍 黎建全 向成礼 |
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| 作者单位： | 重庆大学材料科学与工程学院;攀钢集团攀枝花钢钒有限公司; |
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| 摘 要： | 通过喷嘴性能测试、重熔凝固冷却实验和计算机仿真软件计算,研究了攀钢不同断面板坯角部冷却情况对铸坯角部横裂纹的影响.研究表明:对于1 160、1 080和1 250mm三个断面尺寸的铸坯,较强的冷却使角部温度较早低于A3温度,矫直前沿奥氏体晶界形成大量膜状先共析铁素体,矫直时容易沿奥氏体晶界形成角部横裂纹.为解决角部横裂纹问题,通过改变铸坯表层组织来控制铸坯角部横裂纹的产生,并将其应用于攀钢现场生产.
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| 关 键 词： | 连铸 二次冷却 裂纹 微观组织控制 |
Analysis on corner transverse cracks of slabs with different section dimensions cast with Pangang slab casting machine |
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| LI Ju-yan,WEN Guang-hua,TANG Ping,LI Jian-quan,XIANG Cheng-li. Analysis on corner transverse cracks of slabs with different section dimensions cast with Pangang slab casting machine[J]. Journal of University of Science and Technology Beijing, 2011, 33(3): 296-301 |
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| Authors: | LI Ju-yan WEN Guang-hua TANG Ping LI Jian-quan XIANG Cheng-li |
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| Affiliation: | LI Ju-yan1),WEN Guang-hua1),TANG Ping1),LI Jian-quan2),XIANG Cheng-li2)1) College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China2) Pangang Group Panzhihua Steel & Vanagium Co.Ltd.,Panzhihua 617000,China |
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| Abstract: | The effect of cooling conditions on the corner transverse cracks of slabs with different section dimensions was studied by nozzle performance measurements,remelting and solidification cooling experiments and numerical simulations.The results show that the corner temperature is lower than the A3 temperature earlier for slabs with section dimensions of 1 000,1 160 and 1 250 mm during a stronger cooling.There is a large number of film-like proeutectoid ferrite along grain boundaries,and transverse cracks form ... |
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| Keywords: | continuous casting secondary cooling cracks microstructure control |
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