HRB400钢热物性参数对小方坯连铸凝固传热模型影响的研究  

Research in effect of thermo-physical parameters about HRB400 on numerical simulation of solidification and heat transfer in continuous billet casting

作　　者：李璐 周存龙[1] 刘丽晶 王强[1] 李杰 邢建军 LI Lu;ZHOU Cun-long;LIU Li-jing;WANG Qiang;LI Jie;XING Jian-Jun(Key Laboratory of Metallurgical Equipment Design Theory and Technology of Shanxi Province,Taiyuan University of Science and Technology,Taiyuan 030024,Shanxi,China;Research and Development Institute,HBIS Group Co.,Ltd.,Shijiazhuang 050000,Hebei,China;HBIS Group Chengsteel Company,Chengde 067000,Hebei,China)

机构地区：[1]太原科技大学山西省冶金设备设计理论与技术重点实验室,机械工程学院,山西太原030024 [2]河钢集团钢研总院,河北石家庄050000 [3]河钢集团承钢公司,河北承德067000

出　　处：《连铸》2019年第5期14-20,共7页Continuous Casting

基　　金：国家重点专项重点研发计划项目(2017YFB0304202);山西省科技重大专项项目(20181101008);山西省回国留学人员科研资助项目(2017-080)

摘　　要：针对热物性参数的取值直接影响数值模拟连铸凝固传热计算精度的问题,以某钢铁公司小方坯连铸段生产线为参考,利用大型有限元软件ANSYS建立了HRB400钢的小方坯连铸过程温度场,比较了传统方法,日本学者早期低碳钢试验数据及商用金属材料性能软件JMatPro等3种热物性参数选取对模拟精度的影响,并对铸坯凝固过程温度变化分析,结果表明:(1)采用JMatPro相平衡计算出的HRB400热物性参数可使模拟值与实测值相对误差控制在5%范围内,满足分析精度要求;(2)在明确热物性参数选取方法后,分析了在现行工艺条件下,小方坯在连铸凝固过程中的温度及壳厚变化趋势,提出了解决角部温降的措施及提高拉速的方法。通过对连铸过程的数值模拟,对连铸过程的优化具有一定的指导意义。Aiming to the problem of which the value of thermo-physical parameters directly affects the calculation accuracy in numerical simulation of solidification and heat transfer for continuous casting billet,a mathematic model of the billet temperature field is established by FEM software ANSYS and refering to continuous casting production line in a Iron and Steel Corporation. Comparing the effects of the value of thermo-physical parameters computed by traditional formula,Low carbon steel experimental data made by Japanese scholars,the material performance simulation software JMatPro on the simulation precision. Then analyzing the temperature change during solidification. The results indicate:(1)the simulation consequences,which use thermo-physical parameters computed by JMatPro,compare with measured results the accuracy rate is less than 5%.(2)After determining the selection method of thermal properties parameters,the variation trend of temperature and shell thickness of billet during solidification in continuous casting was analyzed under the current process conditions,and the measures to solve the temperature drop of corner and to improve the casting speed were proposed. This study is helpful to optimize the continuous casting process by numerical simulation of continuous casting process.

关 键 词：HRB400 铸坯温度 热物性参数 数值模拟 凝固 

分 类 号：TG3[金属学及工艺—金属压力加工]