Direct-chilling casting of Mg alloy under electromagnetic and ultrasonic combined field

来源期刊：中国有色金属学报(英文版)2010年增刊第2期

论文作者：崔建忠 张志强 乐启炽

文章页码：297 - 305

Key words：low frequency electromagnetic field; ultrasonic field; Mg alloy; DC casting

Abstract: The effects of low frequency electromagnetic (LFEC) field and ultrasonic (US) field on the microstructures, macrosegregation of alloying elements and the mechanical properties of DC cast AZ80 alloy were studied. The results show that both LFEC and US fields can refine the grains of the billets, which results in the increase in mechanical properties and uniformity of alloying element distribution. The effective refinement takes place on the edge of ingots when LFEC field is applied, while in the center of billets when field US is adopted. Combined the characteristics of LFEC and US fields, a new process for direct-chilling (DC) casting of Mg-electromagnetic-ultrasonic (ECUS) casting is developed, by which the grains are refined significantly and are more uniform in the whole ingots, and the mechanical properties of the ingots are improved.