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在恒定磁场作用下对Al-Pb合金进行连续凝固实验,研究了磁场对Al-Pb偏晶合金凝固特性的影响。结果表明,在恒定磁场作用下得到了弥散相均匀分布于基体的凝固试样。随着磁场强度的提高试样中富Pb相粒子的弥散度增加。恒定磁场能增加合金熔体的有效粘度,减小弥散相液滴相对于基体熔体的运动速度,抑制基体熔体对流,促进偏晶合金形成弥散型复合凝固组织。
The continuous solidification experiment of Al-Pb alloy under constant magnetic field was carried out to study the influence of magnetic field on the solidification property of Al-Pb monotectic alloy. The results show that under the action of a constant magnetic field, a solidified sample with uniform dispersed phase in the matrix is obtained. With the increase of magnetic field strength, the dispersion of Pb-rich phase particles in the sample increases. The constant magnetic field can increase the effective viscosity of the alloy melt, reduce the movement speed of the dispersed phase droplets relative to the matrix melt, suppress the convection of the matrix melt and promote the dispersion solidification structure of the amorphous alloy.