Effect of mould material on aluminum alloy ingot quality under low frequency electromagnetic casting

摘要

With the aid of ANSYS software, the effect of different mould external part materials onmagnetic flux density and electromagnetic body force in the liquid aluminum was investigated. Calculatedresults showed that magnetic flux density and electromagnetic body force in the aluminum melt aregreatly increased when the external part of mould is made from A3 steel. A low-frequency electromagneticcasting 6063 aluminum alloy experiment was conducted in the laboratory with the current value of 120 Aand frequency value of 15 Hz. The experiment showed that the microstructure and surface quality ofingots with mould outer part made from A3 steel under low-frequency electromagnetic field are betterthan that of ingots with mould outer part made from austenitic stainless steel. The surface of the ingotswith mould outer part made from A3 steel is smooth and free from exudations and cold shut defects. Theas-cast microstructure consists of fine, uniformly distributed equiaxed grains