The Microstructure of The Semi-solid ZL201 Alloy Obtained by Near-Liquidus Electromagnetic Casting and The Fine Mechanism
Electromagnetic field was applied by ZL201 alloy melt when it was cast in near-liquidus temperature. The effects of electromagnetic stirring power and cooling condition on microstructure were studied. The result showed that, by using electromagnetic field at near-liquidus temperature, alloy microstructures were the fine and uniform non-dendritic grains. Moreover, with current strength increasing and cooling condition strengthening, the trend of the fine and uniform reinforced. When ZL201 alloy was cast at low superheat, the radius of the critical nucleus reduced. Under electromagnetic field, the melt temperature gradient decreased, and the formation of quasi-solid phase atom clusters in the melt was promoted. So the nucleation rate increased and microstructures were fine and uniform. Electromagnetic field made solute uniform, and the rapidity of nucleus growing up in all directions was almost at the same rate, therefore, the grain grew up near-spherical shape.
ZL201 alloy Electromagnetic field Near-liquidus temperature Non-dendritic Fine
Wang Ping Liang Tian
The Key Laboratory of Ministry of Education for Electromagnetic Processing of Materials, Northeastern University, Shenyang 110004, China
国际会议
青岛
英文
1419-1422
2009-10-09（万方平台首次上网日期，不代表论文的发表时间）