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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 15    No. 1    February 2005

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Microstructure and properties of AZ31 magnesium alloy with rapid solidification
ZHAO Hong-liang(赵红亮), GUAN Shao-kang(关绍康),
ZHENG Fei-yan(郑飞燕), LI Qing-kui(李庆奎), WANG Li-guo(王利国)

College of Materials Engineering, Zhengzhou University, Zhengzhou 450002, China

Abstract:Rapidly solidified (RS) AZ31 magnesium alloy ribbons were made using melt spinning technique. The results show that its microhardness increases with the wheel speed, and after heat treatment, the microhardness of the ribbons produced at 1600r/min also increases. Rapid solidification leads to reduction of grain size. When the wheel speed reaches 1600r/min, no Mg17Al12 phase precipitates, while heat treatment at 200℃ leads to precipitation of Mg17Al12 phase. Al-Mn intermetallic compounds with size no larger than 10nm appear in as-spun ribbons. The corrosion potential of the as-cast ingots is lower than that of the as-spun ribbons.

 

Key words: rapid solidification; magnesium alloy; microstructure; properties

ISSN 1672-7029
CN 43-1423/U

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