Preparation of semi-solid slurry at power frequency by annulus electromagnetic stirring method

摘要：

The effect of stirring frequency on the semi-solid A357 aluminum alloy microstructure was investigated by annulus electromagnetic stirring(AEMS) method. The microstructures obtained by AEMS method and ordinary electromagnetic stirring(EMS)method were compared and analyzed. The results show that the primary α(Al)particles become more spherical and fine, and disperse uniformly in a liquid matrix with increasing stirring frequency, and higher stirring frequency is advantageous to obtain the fine spherical semi-solid microstructure by AEMS. Compared with the microstructures obtained at stirring frequency of 50 Hz in EMS, the fine spherical and uniformly distributed semi-solid microstructures can be still obtained at stirring frequency of 50 Hz in AEMS, so stirring frequency of 50 Hz is recommended in AEMS to save investment cost on frequency-conversion facilities.

关键词： A357 aluminum alloy semi-solid electromagnetic stirring slurry preparation

作者: BAI Yue-long XU Jun ZHANG Zhi-feng SHI Li-kai

作者单位: General Research Institute for Non ferrous Metals, Beijing 100088, China

会议类型: 国际会议

会议名称: 2009 Frontier Symposium of China Postductors on Materrials Science(2009年中国博士后材料科学前言论坛)

会议地点: 长沙

会议语种:英文

页码: 531-536

在线出版日期: 2009-11-22（万方平台首次上网日期，不代表论文的发表时间）