(大连理工大学铸造工程研究中心，大连116023)
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、100、120 L/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5~20 mm处施加了频率为2 500 Hz的电磁场。结果表明：与传统连铸方法相比，施加电磁场后空心管坯的质量得到了明显的改善。
关键字: 电磁连续铸造；空心管坯；热交换系数
of hollow billets
（ Engineering Research Center of Foundry,
Dalian University of Technology, Dalian 116023, China）
Abstract: 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 5-20 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.
Key words: electromagnetic continuous casting; hollow billet; heat transfer coefficient
