Study of fluxing temperature in molten aluminum refining process

Aluminum melts are often contaminated with non-metallic inclusions. Large amounts of these inclusions and oxides accelerate the trend of porosity formation in casting parts. They significantly decrease the corrosion resistance and mechanical properties of the aluminum castings. Fluxing is one of the conventional methods for removing inclusions from melts. Efficiency of this process is affected by several parameters, such as: chemical composition, morphology, granulation, the amount of flux, fluxing temperature, fluxing time, and the fluxing method. In this paper, the effect of fluxing temperature on the refining process of molten aluminum alloy has been studied. They have been investigated using tensile test, reduced pressure test (RPT), K-mould test, metallography, SEM, radioscopy, and the optimum temperature of fluxing has been determined.