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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 13    No. 3    June 2003

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Phase transition of Al-Fe-V-Si heat-resistant alloy by spray deposition
TAN Dun-qiang(谭敦强)1, LI Wen-xian(黎文献)1,
XIAO Yu-de(肖于德)1, WANG Ri-chu(王日初)1, 
MA Zheng-qing(马正青)1, XIONG Bai-qing(熊柏清)

1. School of Materials Science and Engineering,
Central South University, Changsha 410083, China;
2. General Research Institute for Nonferrous Metals, Beijing 100088, China

Abstract:Solidification curve of Al-8.5Fe-1.7Si was calculated by thermodynamic models. Phase constitutions of Al-8.5Fe, Al-8.5Fe-1.7Si and Al-8.5Fe-1.7Si-1.3V alloys were analysed at different cooling rates by means of optical microscopy, X-ray diffraction, transmission electron microscopy and so on. Microstructures of spraying deposited ingots and their hot-processed samples were detected, and the phase transitions during spraying deposition, heating process and hot-processing were also studied. The results show that, by spraying deposition, the ideal structures of α(Al) and Al12(Fe, V)3Si can be obtained when cooling rate is above 105K/s; and restraining the formation of Al8(Fe,V)2Si/Al13Fe4 can improve the properties of the alloy.

 

Key words:  spraying deposition; heat-resistant Al alloy; phase constitute; phase transition

ISSN 1672-7029
CN 43-1423/U

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