| 特厚板温度梯度轧制有限元模拟与实验研究 |
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| 引用本文： | 李高盛, 余伟, 蔡庆伍. 特厚板温度梯度轧制有限元模拟与实验研究[J]. 工程科学学报, 2014, 36(10): 1322-1327. DOI: 10.13374/j.issn1001-053x.2014.10.007 |
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| 作者姓名： | 李高盛 余伟 蔡庆伍 |
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| 作者单位： | 1.北京科技大学高效轧制国家过程研究中心, 北京 100083 |
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| 摘 要： | 针对特厚板再结晶型轧制，板坯中心难以变形导致心部晶粒粗大的问题，使用Q345B钢，采用有限元方法建立了特厚板轧制的仿真模型，以研究在特厚板轧制过程中引入厚度方向上的温度梯度对钢板心部应变的影响，并与传统均温轧制进行对比，预测了两种温度场条件下奥氏体再结晶的晶粒尺寸.采用大试样平面应变实验对模拟结果进行验证.研究结果表明，温度梯度轧制有利于增加坯料心部应变量，最大增加了61.35%.计算和实验结果显示温度梯度轧制可以减小特厚板心部晶粒尺寸，晶粒度级别提高了一个等级，说明该工艺对提高特厚板中心区域性能有利.
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| 关 键 词： | 钢板 轧制 温度梯度 有限元分析 再结晶 大试样 平面应变 |
| 收稿时间： | 2013-07-25 |
Finite element simulation and experimental investigation of temperature gradient rolling for ultra-heavy plates |
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| LI Gao-sheng, YU Wei, CAI Qing-wu. Finite element simulation and experimental investigation of temperature gradient rolling for ultra-heavy plates[J]. Chinese Journal of Engineering, 2014, 36(10): 1322-1327. DOI: 10.13374/j.issn1001-053x.2014.10.007 |
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| Authors: | LI Gao-sheng YU Wei CAI Qing-wu |
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| Affiliation: | 1.National Engineering Research Center of Advanced Rolling, University of Science and Technology Beijing, Beijing 100083, China |
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| Abstract: | A finite element model of Q345B ultra-heavy plate rolling was established and the effect of temperature gradient on the strain in the plate core was investigated during the rolling process. The grain size after austenite recrystallization was calculated and compared with tradition processes. The result of simulation was proved by large specimen plane stain experiment and indicated that the process with temperature gradient is favor of strain increasing in the plate core, and the maximum of increment is 61.35%. The calculation and experiment proclaim that the grain size in the plate core is refined by temperature gradient rolling, moreover, increasing the mechanical properties of the ultra-heavy plate. |
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| Keywords: | steel plate rolling temperature gradient finite element analysis recrystallization large specimens plane strain |
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