Purification effects of
glass flux on A356 melt
glass flux on A356 melt
(School of Materials Science and Engineering,
Shanghai Jiaotong University, Shanghai 200030, China)
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