Effect of middle-frequency electromagnetic field on the semi-continuous casting for ZK60 billets

Casting Technology and Quality Improvement of Magnesium Alloys

“…Billets of AZ31 magnesium alloy with and without intermediate frequency electromagnetic field were investigated by Pang et al [24] In his work, compared with microstructures and mechanical properties of the DC casting billet, the medium-frequency electromagnetic continuous casting (MFEMC) billets shows refined and even microstructures throughout the whole section of the billet and improved mechanical properties, the microstructures of AZ31 billets cast in different processes are shown in Fig.10. Ren et al [25] have studied the effects of middle frequency electromagnetic field on the precipitations of ZK60 magnesium alloys, the results show that the microstructure are refined and distribution uniformity of precipitations is observed after applying the middle frequency electromagnetic field (Fig.11). The refined microstructure is in connection with increased nuclei which are likely to be as a result of electromagnetic undercooling which decreases the free energy barrier of nucleation and increases the nucleation tendency by an induced undercooling ∆ and forced convection.…”

Effect of Ca, Sc and Er Microalloying on the Microstructure and Properties of AZ61 Alloys by Electromagnetic Casting

“…The effects of Ca, Sc and Er microalloying on microstructure and properties of AZ61 alloy are investigated. Electromagnetic casting billet processing distinct merits, such as refined microstructure, reduced porosity, segregation and homogenized alloying element [18][19][20], is employed in this work.…”