Effect of Sr Additive Amount and Holding Time on Microstructure of A390 Aluminum Alloy

2017 4th International Conference on Advanced Materials, Mechanics and Structural Engineering

材料科学;机械制造

Zhang, J.H.^1 ; Xing, S.M.^1 ; Han, Q.Y.^2 ; Guo, Q.^3 ; Wang, R.F.^3

School of Mechanical and Electronic Control Engineering, Beijing Jiaotong University, China^1

Department of Materials Engineering, Purdue University, United States^2

Tianjin Lizhong Alloy Group Company Limited, China^3

关键词: Direct readings;    Energy spectrum analysis;    Eutectic silicon;    Modification effect;    Primary silicon;    Short incubations;    Small furnaces;    Sr additions;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/269/1/012015/pdf
DOI  :  10.1088/1757-899X/269/1/012015

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The microstructure of A390 alloy under different Sr additive amounts and holding times was studied by means of direct reading spectrum analysis, energy spectrum analysis, optical microscope and electron microscope. The results show that Sr has a good modification to eutectic Si, while it has a negative effect on primary silicon. The Sr addition will increase the size of primary silicon. When the addition amount of Al-10Sr alloy is 0.6%, the modification of eutectic silicon is the optimum. The Sr has a short incubation period and a fine modification at 10min, but it is more serious burning rate in small furnace smelting, and the modification effect disappears basically after 100min.