Method for treating fused aluminium alloy through flux spraying method

Abstract

The invention relates to a method for treating fused aluminium alloy through a flux spraying method. The aluminium alloy is prepared from, by weight, 13-45 parts of Si, 0.5-5 parts of Mg, 0.05-0.20 part of Mn, 0.1-0.4 part of Cu, 0.10-0.20 part of Cr, 0.1-0.3 part of Zn, 0.1-0.6 part of Fe, 0.1-1 part of rare earth (RE) and the balance aluminium; in the step of treating the fused aluminium alloy through the flux spraying method, a spray gun is used, inert gas is used as a carrier, powder flux is sprayed in the direction vertical to the flowing direction of aluminium alloy liquid, even dispersion of the flux in fused aluminium is achieved, and the residue removal effect is obviously improved; meanwhile, the application amount of flux powder can be lowered, and the efficient method of treating the fused aluminium alloy through energy saving is established.

Description

technical field [0001] The invention relates to the field of smelting aluminum alloy profiles, in particular to a method for processing molten aluminum alloys by spraying flux. Background technique [0002] During the production process of aluminum alloy, some non-metallic inclusions will be brought in, and non-metallic inclusions will also be produced during the remelting process. These non-metallic inclusions are mainly oxidized inclusions, some of which are brought in by the charge, and some of which are oxidized by liquid metal before pouring. Large particle inclusions will make the casting structure discontinuous, reduce the air tightness of the workpiece, become the source of corrosion, significantly reduce the strength and plasticity of the material, and often become the source of cracks in the parts. In addition, the distribution of fine inclusions in the aluminum melt will increase the viscosity of the aluminum melt, thereby reducing the feeding ability of the alum...

AI Technical Summary

Problems solved by technology

With the continuous use of the porous ceramic tube, more and more impurity particles are deposited, intercepted and adsorbed in the filter channel. Small, the liquid metal flow rate increases, the energy applied to the inclusion particles increases, and as a result, the solid particles that have been deposited and adsorbed are easily washed into the liquid metal again, reducing the filtration efficiency, and the purification effect and reliability need to be improved.

Especially for micron-sized small-sized inclusions, the removal efficiency is lower. Therefore, the removal of small-sized non-metallic inclusions is the focus and difficulty of aluminum alloy melt purification. Therefore, it is necessary to find a more effective separation of inclusions craft