Increasing the uniformity of the cast structure aluminum alloy impact constant magnetic field when it is poured
Keywords:
aluminum alloy, cast structure, microscale perturbations, constant magnetic fieldAbstract
It is shown, that when the aluminum Al−Cu−REM alloy is poured into the mold under the condition Re> 2300, microscаle perturbations arise in the metal flow, leading to mixing of its local volumes having different temperatures due to uneven cooling of the flow. Under conditions of cooling of the casting at Fo = 5, the inhomogeneity of the distribution of inclusions of the metallic phases is fixed in the metal structure. Zones of more cooled volumes existed in the melt stream are enriched of inclusions, and ess cooled depleted. The application of a constant magnetic field to the melt (Ha = 13.6, N = 0.04, Al = 3.8), suppresses the perturbations in the melt flow, which contributes to the formation of a uniform casting structure.
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