Transactions of Nonferrous Metals Society of China
JOURNAL OF RAILWAY SCIENCE AND ENGINEERING
|Vol. 12 No. 2 April 2002|
glass flux on A356 melt
（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