Q345A厚板中间坯冷却过程的数值模拟分析
Numerical Simulation Analysis on Cooling Process for Q345A Thick Plates Intermediate Billet
杨 颖, 侯华兴, 敖列哥, 赵宝纯
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作者单位:(鞍钢股份有限公司 技术中心, 辽宁 鞍山 114001)
中文关键字:中间坯; 有限元; 温度场; 数值模拟
英文关键字:intermediate billet; FEM; temperature field; numerical simulation
中文摘要:为了控制表层超细晶钢中间坯温度场变化及表层组织转变,采用Abaqus有限元数值模拟软件,建立了二阶段轧制过程中Q345A厚板中间坯冷却的有限元模型,模拟了快速冷却 + 回温过程中温度场的变化,获得了瞬态温度场的分布云图以及钢坯上表面与中心的温度沿时间的变化曲线,模拟结果与现场的实测结果基本一致,并研究了入水时间对中间坯厚度截面温度的影响,为后续研究超细表层的深度和组织细化机理提供了理论依据。
英文摘要:To control temperature field changes and surface microstructure transformation of intermediate billet of SUF(Surface layers with Ultra Fine grains) steel, using Abaqus simulation software, FEM model of cooling process for Q345A intermediate billet in two stages of rolling was built, and the evolution of temperature field in a rapid cooling and tempering process was simulated. The distribution of transient temperature field and the temperature-time curve of billet surface and center was obtained. The simulated results are in good accordance with practical test results. Besides, the effects of water cooling time on temperature field of billet cross-section were studied. The results can offer a theoretical foundation for investigating the depth of ultra-fine layer and the grain refinement mechanism.