旋转交变磁场和静磁场对Al-18%Si合金变质处理的影响

Effect of Rotary Magnetic & Static Magnetic Field on Modification of Al-18% Si Alloy

分别研究了旋转磁场和静磁场对过共晶Al-18%Si合金变质处理的影响。结果表明:变质处理后,不施加磁场的条件下,块状初晶Si偏聚在试样边缘处,试样中心处为共晶Si;施加旋转交变磁场的条件下,粗大的板条状初晶Si偏聚在试样边缘处,试样中心处为共晶Si;施加静磁场的条件下,在试样整个横断面上初晶Si都是细小的块状,且大小和分布均匀。

The effects of rotary magnetic field and static magnetic field on P-salt modification of Al-18%Si alloy were studied. The results show that, without magnetic field, the plate-like primary Si concentrates at the edge of the sample, and the center is concentrated with the eutectic Si;exerting rotary magnetic field on the P-Salt modified hypereutectic Al-1 8%Si alloy, the primary Si is thick and block-like and concentrates at the edge of the sample, and the center concentrates with the eutectic Si;exerting static magnetic field on the P-Salt modified hypereutectic Al-18%Si alloy, the primary Si is in fined block and the distribution is even.