Abstract:
The researchs purpose was to develop the flux for microstructure modification in
recycled Al-Si-Fe cast alloys. There were eight fluxs for modification in level of 4 wt.%
content and constant holding time (30 min). The alloy was melted and cast into stainless
mold. The experimental results showed an addition of KCl-NaCl-NaF flux results in an
acicular eutectic Si and flake-like -Al
5FeSi phase microstructure. The additions of SrCl2
and SrCl
2-MnO3 fluxs partly modified the eutectic Si into the fibrous morphology.
The additions of MnCl
2 flux were effective to modify the -Al5FeSi phase into the
-Al
15(Mn,Cr,Fe)3Si2 phase, while the eutectic Si was unmodified. The addition of CrCl2,
SrCl
2-MnCl2 and SrCl2-CrCl2 flux fully modifies the -Al5FeSi phase into -Al15(Mn,Cr,Fe)3Si2
phase, while the eutectic Si was modified into fibrous morphology.