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Date of Publication:2022-10-06

Journal:中国有色金属学报

Issue:7

Page Number:1282-1289

ISSN No.:1004-0609

Abstract:By the numerical simulation and experimental investigation, the 7050 ingots were successfully produced by soft-contact electromagnetic demicontinuous casting (SEC). Simulation results show that fluid flow field and thermal field inside the ingot are changed by the electromagnetic field. Experimental results show that, with the soft-contact electromagnetic casting, the surface roughness of the ingot decreases from 101.1 μm to 48.6 μm, the grain size and grain unevenness of ingots decrease from 80-85 μm and 21.69% to 55-70 μm and 11.50%, respectively. The segregations of alloying elements Zn, Mg and Cu are suppressed by applying the soft-contact electromagnetic field. In the demicontinuous (DC) casting, the segregation rates of alloying elements Zn, Mg and Cu are 6.62%, 9.54% and 7.92%, respectively. After applying the soft-contact electromagnetic field, the segregation rates of alloying elements Zn, Mg and Cu decrease to 3.87%, 3.63% and 1.36%, respectively. The distributions of alloying elements are more uniform.

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