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在2024铝合金的凝固过程中施加低压脉冲磁场处理,研究了低压脉冲磁场作用下2024铝合金凝固组织的变化,考察了浇注温度和放电电压对2024铝合金凝固组织中α-Al相形貌和尺寸的影响。结果表明,在低压脉冲磁场的作用下,2024铝合金凝固组织中的初生α-Al相和共晶组织均显著细化。浇注温度越接近液相线温度,初生α-Al的平均晶粒尺寸越小。随着放电电压的升高,初生α-Al的平均晶粒尺寸逐渐减小,当放电电压为250V时,平均晶粒尺寸达到最小值。
In the process of 2024 aluminum alloy solidification, low-pressure pulsed magnetic field was applied to study the changes of solidification microstructure of 2024 aluminum alloy under low-pressure pulsed magnetic field. The effects of pouring temperature and discharge voltage on the morphology and Effect of size. The results show that the primary α-Al phase and the eutectic structure of 2024 aluminum alloy solidified microstructure are significantly refined under the action of low-voltage pulsed magnetic field. The closer the pouring temperature is to the liquidus temperature, the smaller the average grain size of primary α-Al. With the increase of discharge voltage, the average grain size of primary α-Al gradually decreases. When the discharge voltage is 250V, the average grain size reaches the minimum value.