Heat transfer behavior of AZ80–1%Y alloy during low-frequency electromagnetic casting

Heat transfer behaviors of AZ80–1%Y alloy during low frequency electromagnetic casting (LFEC) and direct chilling casting were studied by in-situ temperature measurement. The results demonstrated that the low frequency electromagnetic field (EM) caused forced convection in the melt during LFEC. The...

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Bibliographic Details
Published in:Transactions of Nonferrous Metals Society of China 2015-11, Vol.25 (11), p.3618-3624
Main Authors: BAO, Lei, ZHANG, Zhi-qiang, LE, Qi-chi, RU, Li-li, CUI, Jian-zhong
Format: Article
Language:English
Subjects:
Billet casting
Direct chill casting
Forced convection
Heat transfer
heat transfer behavior
in-situ temperature measurement
Levitation casting
Low frequencies
low-frequency electromagnetic casting
magnesium alloy
Magnesium base alloys
Microstructure
solidification
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Summary:Heat transfer behaviors of AZ80–1%Y alloy during low frequency electromagnetic casting (LFEC) and direct chilling casting were studied by in-situ temperature measurement. The results demonstrated that the low frequency electromagnetic field (EM) caused forced convection in the melt during LFEC. The forced convection led to uniform solidification velocity and temperature field. EM frequency, excitation current intensity and casting temperature could control the heat transfer behavior. The forced convection could improve the microstructure and degrade the difference in microstructure between the edge and center of billet. Appropriate parameters of low frequency EM for casting Mg alloy are 20 Hz of frequency and 60 A of electric current intensity.
ISSN:1003-6326
DOI:10.1016/S1003-6326(15)64003-1