Evaluation and Control of Melt Quality during Melting and Casting of 3104 Alloy for Can Body
Taking 3104 aluminum alloy for can body as object,offline inclusion analysis was carried out using PoDFA(Porous Disc Filtration Apparatus),focusing on the identification of type and content of inclusions at different loca-tions of casting line.The results indicate that for 3104 ingots produced by electrolytic aluminum alloying,the inclusions at the exit of the holding furnace are mainly composed of TiB2 and spinel particles,and the content is high,which is 0.202 mm2/kg.After online degassing,the content of TiB2 and spinel is decreased to 0.129 mm2/kg,however,the overall content remains high with the same inclusion type.After deep-bed filtration,the inclusion is predominately spi-nel with content further decreased to 0.031 mm2/kg.By properly reducing the temperature of the melt in the holding fur-nace,prolonging the holding time,and adding CFF before deep-bed filtration,the melt quality of 3104 alloy is effec-tively enhanced,significantly reducing the rate of broken can during the subsequent punching process.
3104 Alloy for Can BodyMelt QualityEvaluationControl
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