| 宽板坯凝固前沿轻压下率模型的研究 |
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| 引用本文： | 程常桂,帅静,余乐,万文成,刘中天.宽板坯凝固前沿轻压下率模型的研究[J].武汉科技大学学报(自然科学版),2011,34(2). |
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| 作者姓名： | 程常桂 帅静 余乐 万文成 刘中天 |
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| 作者单位： | 武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,湖北,武汉,430081 |
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| 基金项目： | 湖北省自然科学基金资助项目(2009CDB358) |
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| 摘 要： | 结合连铸坯凝固规律及轻压下技术改善铸坯中心偏析的冶金原理,建立宽板坯轻压下率理论模型。根据某厂连铸宽板坯实际生产条件,以传热模型计算的铸坯凝固温度数据作为轻压下率模型计算条件,分析拉速、浇注温度、坯壳凝固收缩特性对铸坯轻压下率的影响规律。结果表明,在相同的拉速和浇注温度条件下,铸坯轻压下率沿拉坯方向的分布总体呈减小趋势;拉速较高时的起始轻压下率小于拉速较低时对应的起始轻压下率;拉速与平均轻压下率呈线性递减关系:拉速每升高0.1m/min,平均轻压下率减小0.015mm/m;浇注温度越低,轻压下区起始轻压下率的值越高;浇注温度对平均轻压下率的影响较小,浇注温度每升高10℃,平均轻压下率仅减小0.002 5mm/m;铸坯外部凝固坯壳的收缩对整个轻压下区平均轻压下率的贡献量为20.4%～22.3%。
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| 关 键 词： | 连铸 宽板坯 轻压下率 凝固前沿 |
Soft reduction gradient model in solidification front of continuous wide slab casting |
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| Cheng Changgui,Shuai Jing,Yu Le,Wan Wencheng,Liu Zhongtian.Soft reduction gradient model in solidification front of continuous wide slab casting[J].Journal of Wuhan University of Science and Technology(Natural Science Edition),2011,34(2). |
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| Authors: | Cheng Changgui Shuai Jing Yu Le Wan Wencheng Liu Zhongtian |
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| Institution: | Cheng Changgui,Shuai Jing,Yu Le,Wan Wencheng,Liu Zhongtian (Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education,Wuhan University of Science and Technology,Wuhan 430081,China) |
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| Abstract: | This paper has derived soft reduction gradient model by using the solidification law of continuous casting strand and the metallurgical principle of soft reduction technology to improve centerline segregation.According to the production conditions of the wide slab in a certain plant,it analyzes the influence of casting speed,casting temperature,and solidification characteristics on the soft reduction gradient subjected to the strand temperature distribution and thickness of solidification shell which are ca... |
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| Keywords: | continuous casting wide slab soft reduction gradient solidification front |
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