中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 10 No. 4 August 2000 |
（1. Foundry Institute, University of Science and Technology Beijing, Beijing 100083, P.R.China;
2. Beijing Institute of Aeronautical Materials, Beijing 100095, P.R.China）
Abstract:Semisolid hypereutectic Al-Si alloy billets were obtained by electromagnetic stirring, in which microstructure of primary silicon gets rounder and there are a large number of rosetteαphases appearing. Compared with conventional gravity die casting alloys, the tensile strength and elongation of semisolid forming hypereutectic Al-Si get obviously improved. Change of primary silicon morphology of semisolid hypereutectic Al-Si alloy made by electromagnetic stirring is the main reason of better tensile strength, and a large number of rosetteαphases precipitation is the main reason of better elongation.
Key words: semisolid processing; hypereutectic Al-Si alloy; tensile strength; elongation
