齿轮钢20CrMnTi方坯凝固过程传热数值模拟  

Mathematical simulation on solidification process of square billet of 20CrMnTi gear steel in continuous casting

作　　者：史建凯 岳峰 郑力宁 翟万里[3] 张洪才[3] 刘佳伟 SHI Jiankai;YUE Feng;ZHENG Lining;ZHAI Wanli;ZHANG Hongcai;LIU Jiawei(Collaborative Innovation Center of Steel Technology,University of Science and Technology Beijing,Beijing 100083,China;School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China;Jiangsu Shagang Group Huai Steel Special Steel Corporation,Huaian 223001,Jiangsu,China)

机构地区：[1]北京科技大学钢铁共性技术协同创新中心,北京100083 [2]北京科技大学材料科学与工程学院,北京100083 [3]江苏沙钢集团淮钢特钢有限公司,江苏淮安223001

出　　处：《江西冶金》2021年第5期17-23,共7页Jiangxi Metallurgy

摘　　要：基于薄片移动边界法建立200 mm×200 mm方坯凝固过程传热数学模型,通过商业软件ProCAST对方坯20CrMnTi的温度场进行数值模拟,计算出了热物性参数。将工业现场实测的铸坯表面温度与模拟结果进行比对分析,其误差在工程误差允许范围(5%)内,因此,本数学模型能够较准确地反映现场的实际生产情况。在此模型的基础上讨论了不同过热度、拉速、二冷水量对方坯表面温度、中心温度、中心固相率及液芯长度的影响,对连铸工艺参数的优化提供有效指导。In this paper,based on the thin section moving boundary method,a mathematical model of heat transfer in solidification process of 200 mm×200 mm billet was established.The temperature field of 20CrMnTi billet was numerically simulated by the commercial software ProCAST,and the thermal physical properties of the billet were calculated.By comparing and analyzing the measured billet surface temperature in the industrial field with the simulation results,the error is within the allowable range of engineering error(5%),so the mathematical model can more accurately reflect the actual production situation in the field.On the basis of this model,the effects of different superheat,drawing speed and secondary cooling water rate on surface temperature,center temperature,central solid ratio and core length of the blank were discussed to provide effective guidance for the optimization of continuous casting process parameters.

关 键 词：20CrMnTi齿轮钢 方坯 温度场 凝固 数值模拟 

分 类 号：TG244[金属学及工艺—铸造] TF713.2[冶金工程—钢铁冶金]