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利用有限元技术分析了转动管半固态制浆工艺过程的热流耦合场。结果表明,在转动输送管内壁对合金液的剪切作用下,熔体流经输送管期间的紊流效应增强,有利于提高熔融态合金的有效形核数目和等轴非枝晶的形成。合金液温度从输送管入口到出口逐渐下降,合金温度场等温线沿着输送管转动的切向方向发生偏移,温度沿着切向递增。随着合金液浇注温度的升高或者输送管转速的降低,半固态浆料的出口温度升高,与实验结果一致。
The finite element method was used to analyze the heat and fluid coupling field in semi-solid slurry spinning process of rotating tube. The results show that the turbulent effect of the melt flowing through the delivery pipe is enhanced under the shear effect of the alloy liquid on the inner wall of the rotating transfer tube, which is beneficial to increase the effective nucleation number and the formation of equiaxed non-dendrites in the molten alloy. The temperature of the alloy liquid gradually decreases from the inlet to the outlet of the delivery pipe, and the temperature field isotherm of the alloy shifts along the tangential direction of the rotation of the delivery pipe, and the temperature increases along the tangential direction. With the increase of pouring temperature of molten alloy or the decrease of conveying speed, the outlet temperature of semi-solid slurry increased, which is consistent with the experimental results.