TP2铜管坯水平连铸工艺一次水冷数值模拟  

Numerical Simulation of Primary Water Cooling for Horizontal Continuous Casting Process of TP2 Copper Pipe Billet

作　　者：项凯 岳峰丽[1] 孙红运 陈大勇[2] 陈传来 XIANG Kai;YUE Fengi;SUN Hongyun;CHEN Dayong;CHEN Chuanai(School of Automotive and Transportation,Shenyang Ligong University,Shenyang 110159,China;Shi-changxu Innovation Center for Advanced Materials,Institue of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;Eastran Group Changzhou Enreach Copper Co.,Ltd.,Changzhou 213149,China)

机构地区：[1]沈阳理工大学汽车与交通学院,辽宁沈阳110159 [2]中国科学院金属研究所师昌绪材料创新中心,辽宁沈阳110016 [3]东方润安集团常州润来科技有限公司,江苏常州213149

出　　处：《铜业工程》2024年第6期54-65,共12页Copper Engineering

基　　金：辽宁省教育厅基本科研项目(LJKMZ20220591)资助。

摘　　要：水平连铸工艺是生产TP2铜管的第一道工序且过程繁琐,铸坯的质量直接决定了其成品的质量。在实际生产过程中结晶器处于密闭状态,不能直接观测一冷水在铜套内的变化规律。为探究一冷水在水路中流速的变化以及对铜套外表面温度场的影响,采取数值分析的方法,建立结晶器有限元稳态模型,采用BSLk-omega湍流模型进行求解,对进水流量和差异水流量在铜套内的流场和温度场进行模拟,并绘制一冷水在水路中的流速变化曲线以及铜套外表面中线处的稳态温度曲线。结果表明,在浇铸温度为1165℃、牵引速度为382mm/min以及进水温度为32℃的初始条件下,当上下进水流量相同时,每增加4L/min进水流量,水缝处流速平均增加1.75m/s,在铜套外表面中线0.23m处温度平均降低5.7℃。在上下进水流量存在差异且受到重力作用的情况下,当流量差异每增大4L/min时,下半部一冷水的流速平均增加0.32m/s,铜套外表面中线0.23m处温度平均降低6.5℃;当流量差异为3L/min时,可以缓解下半部冷却强度不足的情况。The horizontal continuous casting process is the first step in the production of TP2 copper tubes,and the process is cumbersome.The quality of the cast billet directly determines the quality of the final product.In the actual production process,the mold is in a closed state,and the change rule of the primary cooling water inside the copper sleeve cannot be directly observed.To explore the change of the flow velocity of the primary cooling water in the waterway and its influence on the temperature field on the outer surface of the copper sleeve,numerical analysis was adopted to establish a finite element steady-state model of the mold.The BSL k-omega turbulence model was used to solve the problem,simulating the flow field and temperature field inside the copper sleeve under different inlet flow rates and differential water flow rates.The flow velocity variation curve of the primary cooling water in the waterway and the steady-state temperature curve at the midline of the outer surface of the copper sleeve were plotted.The results show that when the pouring temperature is 1165℃,the hauling speed is 382 mm/min,and the inlet water temperature is 32℃,with the same upper and lower inlet flow rates,the flow velocity at the water gap increases by an average of 1.75 m/s for every 4 L/min increase in inlet flow rate,and the temperature at 0.23 m from the midline of the outer surface of the copper sleeve decreases by an average of 5.7℃.When there is a difference in the upper and lower inlet flow rates and under the influence of gravity,the flow velocity of the primary cooling water in the lower half increases by an average of 0.32 m/s for every 4 L/min increase in flow rate difference,and the temperature at 0.23 m from the midline of the outer surface of the copper sleeve decreases by an average of 6.5℃.A flow rate difference of 3 L/min can alleviate the insufficient cooling intensity in the lower half.

关 键 词：水平连铸 TP2铜管坯 石墨结晶器 一次水冷 数值模拟 

分 类 号：TG29[金属学及工艺—铸造]