Minimization of Macrosegregation in DC Cast Ingots Through Jet Processing

TitleMinimization of Macrosegregation in DC Cast Ingots Through Jet Processing
Publication TypeJournal Article
Year of Publication2016
AuthorsWagstaff, SR, Allanore, A
JournalMetallurgical and Materials Transactions B-Process Metallurgy and Materials Processing Science
Volume47
Issue5
Pagination3132 - 3138
Date Published2016/10//
ISBN Number1073-5615
Keywordsbed, plumes, sediment transport
Abstract

With an increase in demand for aluminum alloys, industrial suppliers are seeking to increase the size and speed of casting processes. Unfortunately operating the existing Direct-Chill (DC) process in such conditions tends to enhance metallurgical defects. Perhaps the most recognized of these defects is macrosegregation, whose effects are permanent once the material is solidified. In order to facilitate the expansion of the DC process without increasing the presence of macrosegregation, a novel jet mixing method to distribute the liquid metal is presented. The governing equations for this process are derived and the operating parameters necessary to minimize the centerline macrosegregation are predicted. The results of commercial-scale tests are presented, validating the predictive equations and performance of this process.

Short TitleMetall. Mater. Trans. B-Proc. Metall. Mater. Proc. Sci.