The effects of several fluxes on purification, microstructures and properties of A00 aluminum have
been studied. The experimental results and analyses indicate that many cracks and large porosities exist in the
surface film above the melt purified by C2Cl6 and that the film is floc and mostly composed of Al2O3 and pure
aluminum, which carries many carbon particles and AlCl3 not fully volatilized. And then over 50% (mass fraction)
of the all-melting residue is pure aluminum, which is one of the major reasons for high melting loss. Moreover,
because of a mass of gas bubbles and a state of seethe, there are many inclusions which size is under 10 μm in the
microstructure of A00 aluminum purified with C2Cl6 or fluxes containing C2Cl6. With this purifying method, the
aluminum crystal grains are extended along the radius that was observed firstly and the average crystal size of
A00 aluminum are about 100—150 μm. In addition, small size inclusions have little affected on tensile strength
and micro inclusions under 10 μm have little affected on elongation.
NI Hong-jun1 (倪红军), SUN Bao-de2 (孙宝德), WANG Xing-xing1 (汪兴兴)
. Purification Effects of C2Cl6 on A00 Aluminum[J]. Journal of Shanghai Jiaotong University(Science), 2012
, 17(3)
: 277
-281
.
DOI: 10.1007/s12204-012-1268-y
[1] Ni Hong-jun, Huang Ming-yu, Sun Bao-de. The purifying effects and mechanism of JDN-II flux on A356
alloy melt [J]. Journal of Shanghai Jiaotong University,2005, 39(11): 1779-1783 (in Chinese).
[2] Wu Rui-zhi, Qu Zhi-kun, Sun Bao-de, et al. Effects of spray degassing parameters on hydrogen content and
properties of commercial purity aluminum [J]. Materials Science and Engineering A, 2007, 456(1-2): 386-390.
[3] Sofyan B T, Kharistal D J, Trijati L, et al. Grain refinement of AA333 aluminium cast alloy by Al—Ti
granulated flux [J]. Materials and Design, 2010, 31(sup1): S36-S43.
[4] Ni Hong-jun, Zhu Yu, Huang Ming-yu, et al. Purifying effects and mechanism of a new composite filter [J].
Materials Science and Engineering A, 2006, 426(1-2):53-58.
[5] Majidi O, Shabestari S G, Aboutalebi M R. Study of fluxing temperature in molten aluminum refining
process [J]. Journal of Materials Processing Technology,2007, 182(1-3): 450-455.
[6] Mashhadi H A, Moloodi A, Golestanipour M, et al. Recycling of aluminium alloy turning scrap via
cold pressing and melting with salt flux [J]. Journal of Materials Processing Technology, 2009, 209(7): 3138-3142.
[7] Verran G O, Kurzawa U. An experimental study of aluminum can recycling using fusion in induction furnace
[J]. Resources, Conservation and Recycling, 2008,52(5): 731-736.
[8] Shi Ting-zao, Wang Yu-wei. Casting applied handbook [M]. Shenyang, China: Northeast University Press, 1994 (in Chinese).
[9] Ni Hong-jun, Sun Bao-de, Jiang Hai-yan, et al. Aluminum and aluminum alloy rare earth flux [P]. CN, ZL00116611.5, 2004-10-27.
[10] Ni Hong-jun, Sun Bao-de, Liu Man-ping, et al. Purification of the scrap aluminum foil and aluminum melt
covering and protecting and atomic purification theory [J]. Transactions of Nonferrous Metals Society of China, 2003, 13(3): 521-526.
[11] Lu Wen-hua, Li Long-sheng, Huang Liang-yu. Casting alloys and melting [M]. Beijing: Mechanical Industrial Press, 1996 (in Chinese).
[12] Ni Hong-jun, Huang Ming-yu, Sun Bao-de. Covering and protecting effects of rare earth flux on aluminum
melt [J]. Journal of Shanghai Jiaotong University,2005, 39(1): 23-26 (in Chinese).
[13] Gaustad G, Olivetti E, Kirchain R. Improving aluminum recycling: A survey of sorting and impurity
removal technologies [J]. Resources, Conservation and Recycling, 2012, 58: 79-87.
