The Iron-removed Process Research Of Recycled ADC12 Aluminum Alloy

This topic has studied to reduce the coom content in the ADC 12 alloy by adding modifier and filtenn E. nidi the help of ICP direct reading spectrometer. SEM·EDS. metallograsphic observation, mechanical performance test methods. Metamorphic agent chooses among Al-10wt% Mn alloy, at the same time, studies the mfluence of gas content and the impact on the alloy microstmcture.Filter adopt, fiber filter, using different specifications of the filter and seting different temperature esperiment validation, finally comparling alloy mechanical properties and cotosion resistance.Espenrnental results show that recycled ADC 12 aluminum alloy adding Mn element can effectively reduce the content of Fe, change the iron-rich phase morphology, also Live certain effect to eutectk silicon metainoiphism the addition of Mn degassing effect with the size of the iron reasm-al rate ane basically Edentical.when MnFe =1.0. under 640℃ heat preseivation 60 min iron removal rate reaches 27.22%, the iron-rich phase is small block distribution rules, with the increase of Me element content iron rich phase tend to be irregular with star shape distribution. As adding Mn element .the lenem of dse eutectic silicon become shorter then Erowth longer . when MnFe=1.0 sample ranEe reduce the Length of the eutectic silicon, especially under the condition of the insulation under 720℃ for 30 min the (?) arsiage leneth is only 21μm .After adding lower Mn element content, filtering experiments further reduce the iron content in the alloy, choose 2.0×2.0mm specifications of the filter screen in the 640℃ iron removal rate as high as 13.36%. composite craft Fe content in recycled ADC12 aluminum alloy reduced from 0.782% to 0.502%.Adding Mn element m recycled ADC12 aluminum alloy to improved tensile strength significantly. but excess Mn can make alloy tensile strength decreased and breaken elongation have certain amplitude in crease.From fractre analysis can dearly see the fediue of the original alloy often results from acccular iron-iich phase in the alloy, and a moderate amount of Mn element can effectively change fracture mechanisms. On the one hand. Filterin E reduces thee alloy iron content, on the other hand, it also reduced the oxide inclusions in the alloy. and improved the tensile strength and. elongation of alley, under 640℃ choosing 2.5×2.5 nm filter be filtered alloy tensile strength up to 185.32 MPa, the elongation is 2.50%.Mn element to a certain extent improve the inttergranular corrosion resistant ability of ADC12 aluminum alloy, alloy corrosion weight loss rate when MnFe=0.8 (?) 7.6214×10-4 g/(cm2h). where part of the intererystalline corroston and local comosion of eutectic area, conqiared with the untreated alloy specimens corrosion to shallow to narrow gap.With fuither increase of Mn element content, we can see the intergranular and eutectic alloy samples were happened, area of corrostion. and comosion in eutectic area depth and width of the black clearance (?) with the increase of Mn element content.