(北京科技大学 材料科学与工程学院，北京 100083)
摘 要: 针对玻璃包覆纯铜微丝的制备， 建立熔融纺丝微熔池温度场的有限元模型， 采用磁热耦合方法分析原料质量、 加热电流、 感应线圈匝数及锥角对微熔池平均温度及下部与上部温差的影响规律。 结果表明： 随着原料质量的增大， 平均温度降低， 温差增大； 加热电流对微熔池温度影响较大； 考虑综合效果， 采用锥角为110°的4匝螺旋锥型感应线圈是较合理的。 以数值模拟结果为基础， 实验制备了芯丝直径为14 μm、 玻璃包覆层厚度为15 μm的玻璃包覆纯铜微丝。
关键字: 玻璃包覆金属微丝; 熔融纺丝; 微熔池； 磁热耦合； 数值模拟
（ School of Materials Science and Engineering,
University of Science and Technology Beijing, Beijing 100083, China）
Abstract: The finite element model of temperature field of micro melting bath in melting spinning was developed based on the fabrication of glass-coated pure copper. By using the method of magnetic-thermo coupling, the influence rules of some process parameters, including the mass of raw material, heating current, the number of turns and cone angle of induction coil, on mean temperature and temperature difference between the bottom and top of micro melting bath were analyzed. The results show that the mean temperature decreases and temperature difference increases with the mass of raw material increasing, and the heating current has great effect on the temperature of micro melting bath, and the spiral induction coil of 4 turns and cone angle of 110° is more suitable for comprehensive results. Based on the numerical simulation results, the glass-coated pure copper microwire of 14 μm in core diameter and 15 μm in glass-coated thickness was fabricated.
Key words: glass-coated metal microwire; melting spinning; micro melting bath; magnetic-thermo coupling; numerical simulation
