中國有色金屬學(xué)報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 13 No. 1 February 2003 |
thermal treatment on A356 alloy
JIANG Wan(江 莞)2, SUN Bao-de(孫寶德)1,
ZHOU Yao-he(周堯和)1
（1. School of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai 200030, China;
2. State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics,
Chinese Academy of Sciences,Shanghai 200050, China）
Abstract:Effects of the melt pulse electric current and thermal treatment on solidification structures of A356 alloy were investigated. In the experiments, the low temperature melt(953K and 903K) treated by pulse electric current was mixed with high temperature melt(1223K). By the control experiments, the results show that the solidification structure of A356 alloy is refined apparently by the pulse electric current together with melt thermal treatment process, and the mechanical properties, especially the elongation ratio of the specimen treated is improved greatly. The structure change of the melt by pulse electric current and melt thermal treatment is the main reason for the refinement of the solidification structure of A356 alloy.
Key words: A356 alloy; low temperature melt; solidification structure; pulse electric current; melt thermal treatment
