| 二冷强度对连铸小方坯凝固过程影响规律的数模研究 |
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| 引用本文： | 陈亚楠,包燕平,彭尊,赵立华,王敏.二冷强度对连铸小方坯凝固过程影响规律的数模研究[J].沈阳黄金学院学报,2014(1):60-65,70. |
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| 作者姓名： | 陈亚楠 包燕平 彭尊 赵立华 王敏 |
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| 作者单位： | [1]北京科技大学钢铁冶金新技术国家重点实验室,北京100083 [2]北京科技大学冶金与生态工程学院,北京100083 [3]国家板带生产先进装备工程技术研究中心,北京科技大学,北京100083 |
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| 基金项目： | 国家自然科学基金项目（No.51074019） |
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| 摘 要： | 针对连铸小方坯的中心疏松等质量缺陷，建立了凝固传热数学模型，以研究二冷强度对连铸小方坯凝固过程的影响规律，优化二冷制度，改善铸坯质量.本文基于射钉和测温实验所建立的小方坯凝固传热模型精细度较高，用此模型深入研究二冷喷嘴的数量和喷射范围对小方坯凝固传热的影响；经验证，模拟结果与实测结果误差在1.7％以内.利用该模型定量分析了二冷强度对铸坯温度，凝固坯壳厚度和凝固终点的影响规律.结果表明，随着二冷强度的增大，二冷区内的铸坯表面中心温度降低，而进入空冷区后则逐渐趋于一致.二冷强度每增加10％，足辊段出口处温度平均降低8℃，二冷一段出口处温度平均降低10.75℃，二冷二段出口处温度平均降低10.75℃，二冷三段出口处温度平均降低9.75℃，铸坯凝固终点缩短约0.168m.
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| 关 键 词： | 二冷强度 连铸 小方坯 数学模型 |
Numerical simulation for effect of secondary cooling intensity on solidification during continuous billet casting |
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| Authors: | Chen Yanan Bao Yanping Peng Zun Zhao Lihua Wang Min |
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| Affiliation: | 1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China 2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China; 3. National Engineering Research Center of Flat Rolling Equipment, University of Science and Technology Beijing, Beijing 100083 |
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| Abstract: | Aimed at the loosening in the billet center, a sohdification heat transfer mathematical model was established in order to study influence of the secondary cooling intensity on the continuous casting process and to optimize the secondary cooling system, so it can improve the casting quality. The model based on the pin shooting and the temperature measuring had a higher accuracy taken into account the amount of secondary cooling nozzle and the spray range. It proved that the compared simulation results with the measured ones there was an error less than 1.7% . The influences of secondary cooling intensity on the continuous casting billet temperature, thickness of the shell and the terminal point of the solidification were analyzed. The results showed that, surface temperature of the billet decreased by about 8℃ on the outlet of the foot roller segment; surface temperature of the billet decreased by about 10. 75℃ on the outlet of first and second sections in secondary cooling zone; surface temperature of the billet decreased by about 9.75℃ on the outlet of third sections in secondary cooling zone ; the terminal point of the solidification was shorten about 0.168 m when secondary cooling water increased by 10%. |
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| Keywords: | secondary cooling intensity continuous casting billet mathematical model |
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