【摘要】 对圆坯电磁软接触铸造过程中的温度场进行了数值模拟分析,研究了电磁场参数感应热、安培匝、频率以及下拉速度、结晶器壁厚、结晶器开缝数对熔体温度场的影响,研究表明施加电磁场后使得熔体内温度趋于均匀;熔体的温度对拉速非常敏感,拉速每增加0.01m/s,结晶器内熔体平均温度降低量减少约30K;施加电磁场之后熔体平均温度随着安培匝的增加而升高;在其他参数固定前提下,结晶器壁厚每降低1mm熔体温度平均升高约1.6K;开缝数每增加一个,平均温度增加约0.2K;在其他参数固定前提下,频率对温度场的影响不明显。更多还原

【Abstract】 The temperature field during soft-contact electromagnetic casting of round duraluminium alloy billets is numerically simulated. The influences of induction heat, withdrawal rate, ampere winding, the thickness of crystallizer wall, the number of slits and the frequency on the temperature distribution are discussed in detail. The simulation results indicate that the temperature pattern of melt is very sensitive to the withdrawal rate and symmetrical in the presence of the electromagnetic field. The reduction of average temperature reduces about 30 K when the withdrawal rate increases 0.01 m/s. The average temperature of melt increases with the increase of ampere windings. The average temperature of melt heightens about 1.6 K when the thickness of mould wall reduces 1mm and 0.2 K when the number of slits of mould increases one. The influence of the frequency on the temperature pattern is not obvious.更多还原