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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 10    No. 1    February 2000

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Effects of solid deformation and melt vibration on structure and refining performance of Al5Ti1B master alloy①
QI Xiao-gang(亓效刚)1, LIU Xiang-fa(刘相法)1,
BIAN Xiu-fang(边秀房)1, WANG Da-qing(王大庆)2, MA Jia-ji(马家骥)1

1. College of Materials Science and Engineering, Shandong University of Technology,
Jinan 250061, P.R.China;
2. ShandongNormal University, Jinan 250014, P.R.China

Abstract:Grain refinement can offer significant benefits to both continuous casting and cast-to-shape products, and Al5Ti1B master alloy containing mainly TiAl3and TiB2particles in Al matrix has been proven to perform well for giving the best refinement, but the working method of adding Al5Ti1B rod to the furnace during casting are often related to solid deformation, and melt vibration may help to reduce the size of TiAl3and improve the distribution of TiB2. Therefore the effects of solid deformation and melt vibration on the structures and refinement performance of Al5Ti1B master alloys were studied. The experimental results show that both solid deformation and melt vibration can improve the distribution of TiB2 in Al5Ti1B master alloys, increase the interface energy and nucleation activity of TiB2particles. In the meantime, solid deformation can store deformation energy and melt vibration can break fragile plate-like TiAl3compounds. So both methods can improve the refinement effectiveness of Al5Ti1B master alloys.

 

Key words: Al5Ti1B master alloy; solid deformation; melt vibrationDocument code: A

ISSN 1672-7029
CN 43-1423/U

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