Minimization of Macrosegregation Through Jet Erosion of a Continuously Cast Ingot

Recent investigations have suggested important benefits in using a turbulent mixing jet impinging into the molten pool of a continuously cast Al4.5Cu ingot [1]. It was for example demonstrated that such jet can significantly modify the macrosegregation patterns found in large castings. One possible reason put forth for this modification is the ability of the jet to suspend sedimented grains from the ingot centerline. In this study, we propose a model to optimize the re-suspension of grains through the use of an engineered jet. We have recently completed series of full scale experiments using a variety of jet powers for Al4.5Cu ingots. In this study we completed a blind study of a new alloy (AA3104) cast under different conditions in order to validate the robustness of our model. Results confirm the potential of a turbulent jet to mitigate the degree of centerline segregation in DC cast products for a relatively broad range of alloys.