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设计了5种电脉冲处理Al-5%Cu合金熔体实验方案,分别探讨了脉冲电场、脉冲磁场、脉冲电流、等效直流电热效应对熔体的作用以及空白试验。结果表明,脉冲电场、脉冲电流对该合金的晶粒起到明显的细化作用,而脉冲磁场、等效直流电热效应对晶粒的细化没有明显影响;脉冲电场、脉冲电流作用下熔体凝固点明显降低、过冷度加大,而脉冲磁场、等效直流电热效应对熔体的过冷度没有明显影响;脉冲电场、脉冲电流作用下该合金基体显微硬度明显增大,脉冲磁场、等效直流电热效应对合金基体的显微硬度没有明显影响。
Five kinds of experiment schemes of electric pulse treatment Al-5% Cu alloy melt were designed. The effects of pulsed electric field, pulsed magnetic field, pulse current, equivalent DC electric heating effect on the melt and blank test were discussed respectively. The results show that pulsed electric field and pulsed electric current can obviously refine the grain of the alloy. However, pulsed magnetic field and equivalent DC electric heating effect have no obvious effect on the grain refinement. Under the pulsed electric field and pulsed electric current, the melt solidification point Obviously decreased and the degree of undercooling increased. However, the pulsed magnetic field and equivalent DC electric effect had no significant effect on the undercooling of the melt. The microhardness of the alloy matrix increased obviously under the pulsed electric field and pulsed current. The pulsed magnetic field was equivalent The effect of direct current heating on the microhardness of the alloy matrix has no significant effect.