(北京科技大學(xué) 材料科學(xué)與工程學(xué)院，北京 100083)
摘 要: 針對(duì)玻璃包覆純銅微絲的制備， 建立熔融紡絲微熔池溫度場(chǎng)的有限元模型， 采用磁熱耦合方法分析原料質(zhì)量、 加熱電流、 感應(yīng)線圈匝數(shù)及錐角對(duì)微熔池平均溫度及下部與上部溫差的影響規(guī)律。 結(jié)果表明： 隨著原料質(zhì)量的增大， 平均溫度降低， 溫差增大； 加熱電流對(duì)微熔池溫度影響較大； 考慮綜合效果， 采用錐角為110°的4匝螺旋錐型感應(yīng)線圈是較合理的。 以數(shù)值模擬結(jié)果為基礎(chǔ)， 實(shí)驗(yàn)制備了芯絲直徑為14 μm、 玻璃包覆層厚度為15 μm的玻璃包覆純銅微絲。
關(guān)鍵字: 玻璃包覆金屬微絲; 熔融紡絲; 微熔池； 磁熱耦合； 數(shù)值模擬
（ 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
