管坯电磁连铸内结晶器侧换热系数的模拟与研究  

Numerical simulation and experimental research of heat transfer coefficient in electromagnetic continuous casting of hollow billets

作　　者：张琦[1] 李丘林[1] 李廷举[1] 郑贤淑[1] 金俊泽[1] 

机构地区：[1]大连理工大学铸造工程研究中心,大连116023

出　　处：《中国有色金属学报》2004年第12期2073-2078,共6页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目 ( 5 9995 44 2 ) ;中科院精密铜管开发中心资助项目

摘　　要：将实验得到的初始凝固坯壳的形状与数值模拟结果相结合的反推法确定了内结晶器冷却水量与内结晶器侧壁换热系数之间的关系 ,模拟了冷却水流量为 80、10 0、12 0L/s时凝固坯壳的形状和位置 ;在模拟得到的固液界面位置附近 ,即距液面 5～ 2 0mm处施加了频率为 2 5 0 0Hz的电磁场。结果表明 :与传统连铸方法相比 。The relationship between the cooling water flow rate and the heat transfer coefficient at the billet/core interface was built up via the trial-and-error approach. The position and shape of the initial solidified shell were predicted by the numerical simulation when the cooling water flow rate is 80, 100 and 120 L/s. The electromagnetic field with the frequency of 2 500 Hz was imposed to the position of liquid/solid interface which was 520 mm close to the liquid level. The results show that comparing with the conventional continuous cast one, the electromagnetic cast has obviously improved billet quality.

关 键 词：电磁连续铸造 空心管坯 热交换系数 

分 类 号：TG213[金属学及工艺—铸造]