(1. 哈尔滨工业大学 材料科学与工程学院，哈尔滨 150001；2. 天津航天长征火箭制造有限公司，天津 410083)
摘 要: 利用实验测量和数值模拟方法研究电磁冷坩埚连续熔铸高铌钛铝合金的温度场，利用Ansys软件建立温度场的计算模型。结果表明：冷坩埚内的感应加热由集肤层开始，向炉料内部和底部传热，经过一段时间后达到热传递平衡，温度不再升高；随着加热功率的增加，高铌钛铝熔体稳态温度和最高温度都升高，50 kW时，具有一定的过热度，在0.7 mm/min抽拉速度和50 kW条件下可成功实现冷坩埚连续熔铸高铌钛铝合金锭。
关键字: 高铌钛铝合金；电磁冷坩埚；温度场；连续熔铸；数值模拟
（1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;
2. Tianjin Spaceflight Changzheng Missile Manufacture Limited Company, Tianjin 410083, China）
Abstract:The temperature field in electromagnetic cold crucible continuous melting and solidifying of high Nb containing TiAl alloys was researched by experimental and numerical simulation methods, the calculation model was established with Ansys software. The results show that, the induction heating originates from the skin layer of the ingot in the cold crucible, and then transfers to the inner and lower parts, thermal equilibrium will be reached after some time, and the temperature will not increase further. Both the steady temperature and highest temperature of the melt increase with the power increasing, the melt is overheated when the power is 50 kW. The electromagnetic cold crucible continuous melting and solidifying high Nb containing TiAl alloy is achieved successfully under the condition of 50 kW and 0.7 mm/min.
Key words: high Nb containing TiAl alloy; electromagnetic cold crucible; temperature field; continuous casting; numerical simulation
