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矩形坯连铸结晶器铜管构型优化
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Abstract:
管式结晶器易于变形的问题限制了矩形坯连铸拉速的提高。为此本研究设计了不同形式水槽结构的矩形坯结晶器铜管，通过有限元方法计算了铜板的温度分布、应力分布与节点位移，分析了三个不同类型结构对结晶器寿命的影响。结果表明，大倒角弧形水槽矩形结晶器构型最佳，且结构优化后结晶器变形程度降低，铜板传热能力和冷却均匀性显著提高。其中在温度分布上，铜板热面最高温度下降7℃~8℃，平均温度下降3℃~4℃，角部温度变化最小。在应力应变分布上，应力变化最大截面的应力应变呈层状有序分布，且水槽和倒角周围应力变化率下降至10%~20%，水槽根部平均节点位移在5.85 × 10？5 m。
The easy deformation of tubular mold limits the improvement of drawing speed of rectangular billet continuous casting. In this study, the copper tubes of rectangular billet mould with different flume structures were designed. The temperature distribution, stress distribution and joint displacement of the copper plates were calculated by finite element method, and the influence of three different structures on the life of the mould was analyzed. The results show that the rectangular mould with large chamfered curved water tank has the best configuration, and the deformation degree of the mould is reduced after optimization, and the heat transfer capacity and cooling uniformity of the copper plate are significantly improved. In terms of temperature distribution, the maximum temperature of the hot surface of the copper plate decreased by 7？C~8？C, the average temperature decreased by 3？C~4？C, and the corner temperature changed the least. In terms of the stress-strain distribution, the stress-strain distribution of the section with the largest stress change is stratified and orderly, and the stress change rate around the flume and chamfer decreases to 10%~20%, and the average node displacement of the flume root is 5.85 × 10？5 m.
| [1] | 朱广侠. 中国中冶: 绿色、低碳、智能引领钢铁产业转型升级[J]. 国际工程与劳务, 2022(3): 22-25. |
| [2] | 郭林. 绿色冶金在环境保护中的重要作用[J]. 资源节约与环保, 2018(2): 120. https://doi.org/10.16317/j.cnki.12-1377/x.2018.02.070 |
| [3] | 江中块, 李俊杰, 张森森, 等. 板坯连铸结晶器铜板冷却水槽结构优化[J]. 材料与冶金学报, 2019, 18(2): 101-105. https://doi.org/10.14186/j.cnki.1671-6620.2019.02.004 |
| [4] | 尹雪琳. 连铸结晶器铜板热——力耦合模拟及冷却系统研究[D]: [硕士学位论文]. 大连: 大连理工大学, 2016. |
| [5] | 聂荣恩, 么旭林, 崔猛. 矩形坯高拉速连铸结晶器开发与应用[J]. 炼钢, 2023, 39(5): 48-56 |
| [6] | Wang, S.J., Xu, P., Zhou, Y.Z., Duan, H.M., Chen, D.F. And Long, M.J. (2023) The Effect of Mold Structure and Cooling Parameters on Heat Transfer during Billet High-Speed Continuous Casting. Materials, 16, Article 3361. https://doi.org/10.3390/ma16093361 |
| [7] | Thomas, B., Li, G., Moitra, A., et al. (1998) Analysis of Theramal and Mechanical Behavior of Copper Molds during Continuous Casting of Steelslabs. 80th Steelmaking Conference, Warrendale, 13-16 April 1997, 125-143. |
| [8] | 王颖, 等. 水槽深度对板坯结晶器热/力行为的影响[J]. 连铸, 2016, 41(3): 20-22. |
| [9] | 任飞飞. 倒角结晶器铜板传热过程数值仿真[D]: [硕士学位论文]. 北京: 钢铁研究总院, 2017. |
| [10] | 王卫华, 王文军, 刘洋, 等. 倒角结晶器温度场应力场有限元模拟[J]. 连铸, 2013(1): 5-9+13. https://doi.org/10.13228/j.boyuan.issn1005-4006.2013.01.009 |
| [11] | 郝鸿鑫. 特厚矩型坯结晶器流场与温度场模拟及锥度计算[D]: [硕士学位论文]. 秦皇岛: 燕山大学, 2016. |
| [12] | 杨昌霖, 高琦, 姚成功, 曾晶. 板坯连铸结晶器铜板水槽的优化设计[J]. 中国冶金, 2021, 31(3): 102-112. |
| [13] | 江中块, 李俊杰, 张森森, 等. 板坯连铸结晶器铜板冷却水槽结构优化[J]. 材料与冶金学报, 2019, 18(2): 101-105. https://doi.org/10.14186/j.cnki.1671-6620.2019.02.004 |
| [14] | Yu, S., Long, M.J., Chen, D.F., Fan, H.L., Yu, H.S., Duan, H.M., Xie, X. and Liu, T. (2019). Effect of the Mold Corner Structure on the Friction Behavior in Slab Continuous Casting Molds. Journal of Materials Processing Technology, 270, 157-167. https://doi.org/10.1016/j.jmatprotec.2019.02.009 |
| [15] | 姜嵇银, 蔡兆镇, 朱苗勇. 板坯连铸结晶器铜板热/力学行为数值模拟研究[C]//中国金属学会. 第十四届中国钢铁年会论文集——炼钢与连铸. [出版者不详], 2023: 8. |
| [16] | 刘旭东, 朱苗勇, 程乃良. 板坯连铸结晶器的热弹塑性力学分析[J]. 金属学报, 2006(11): 1137-1142. |
| [17] | Du, F.M., Wang, X.D., Liu, Y., Wang, S.J., Zhang, Z. and Yao, M. (2015) Investigation on Thermo-Mechanical Behavior of Mold Corner for Continuous Casting Slab. ISIJ International, 55, 2150-2157. https://doi.org/10.2355/isijinternational.isijint-2015-230 |
