中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 15 No. 5 October 2005 |
（1. Materials Engineering College, Dalian University of Technology,
Dalian 116024, China;
2. Electromechanics and Materials Engineering College, Dalian Maritime University, Dalian 116026, China）
Abstract: Effects of high magnetic field on modification of Al-6%Si hypoeutectic alloy, Al-12.6%Si eutectic alloy and Al-18%Si hypereutectic alloy were studied. For the Al-6%Si alloy, it is found that the sample modified by Na-salt does not lose efficacy after remelting under high magnetic field. For the Al-12.6%Si alloy, if the sample modified by Na-salt is kept at the temperature of modification reaction, high magnetic field can postpone the effective time of the modification. For Al-18%Si alloy modified by P-salt, the primary Si in solidified structure concentrates at the edge of the sample and eutectic Si appears in the center of the sample under the condition without high magnetic field, while the primary Si distributes evenly in the sample when the high magnetic field is imposed. It is thought that the high magnetic field restrains the convection of the melt.
Key words: high magnetic field; Al-Si alloy; modification
