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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 12    No. 2    April 2002

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Purification effects of
glass flux on A356 melt
NI Hong-jun(倪红军), SUN Bao-de(孙宝德), JIANG Hai-yan(蒋海燕),
CHEN Chen(陈  晨), DING Wen-jiang(丁文江)

School of Materials Science and Engineering,
Shanghai Jiaotong University, Shanghai 200030, China

Abstract:In order to remove hydrogen and inclusions from A356 alloy melt, a low melting-point glass flux, JDN-Ⅱ,was developed. The results indicated that JDN-Ⅱ flux has distinct effect of purification and protection on A356 alloy melt. When the dosage of the flux was 3%, the content of hydrogen in A356 melt was only 2.6mL/kg at 857℃ and 0.7mL/kg even at 750℃. In the meantime, the mechanical properties of the alloy increase greatly with the covering of 3% JDN-Ⅱ flux. Compared with no flux, the tensile strength of A356 alloy increases by 9.42% and the elongation inc r eases by 22%. The purification mechanism of JDN-Ⅱ glass flux was discussed too.

 

Key words: JDN-Ⅱ flux; A356 alloy; degassing; borate glass with low melting-point

ISSN 1672-7029
CN 43-1423/U

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