在有、无磁场作用下进行Al-10％Bi过偏晶合金的凝固实验，分析了1 T 水平稳恒磁场对富 Bi 相分布的影响。结果表明，磁场作用下的合金试样上部的富 Bi 相粒子密度增加，下部的富 Bi 相粒子密度较少，且富 Bi相粒子尺寸分布范围变窄。水平稳恒磁场在一定程度上阻碍了液滴的碰撞凝并和重力沉降，避免了液滴的局部聚集，提高了液滴沿重力方向的均匀程度，有利于获得富Bi相均匀分布的合金凝固组织。
The solidification experiment of Al-10%Bi hypermonotectic alloy were carried out respectively under horizontal static magnetic field and the gravity condition.The effect of 1 T horizontal static magnetic field on Bi-rich phase distribution of hypermonotectic alloy was examined.The results showed that Bi-rich particles density increased in the middle of sample and particles density decreased in the bottom of sample as well as in the width of the Bi-rich particles size distribution under the static magnetic field.The static magnetic hinders collision con-densation between droplets and gravity sedimentation,avoids the local accumulation of droplets,and improves the homogeneous degree of droplets along the direction of gravity to some extent.It’s beneficial to obtain solidi-fication organization of uniformly distributed Bi-rich phase.
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