Papers by Author: Jian Zhong Cui

Abstract: During the low frequency electromagnetic casting process, the electromagnetic parameter plays an important role among the casting parameters. In this work, effects of electromagnetic parameters on the electromagnetic field and body force are analyzed by constructing a two-dimensional finite element model and using ANSYS software which is a kind of commercial FEM analysis software. The results show that the current frequency mainly influences the distribution of electromagnetic body force, the current intensity determines the intensity of electromagnetic body force, and the current frequency and intensity should be matched during the low frequency electromagnetic casting process.

Abstract: Surface segregation layer are frequently encountered during aluminium alloy direct chill casting process, and the removal of the surface segregation layer before further processing of the ingot decreases the ingot yield. In this work, the low frequency electromagnetic field was applied to study the effects of low frequency electromagnetic field on segregation layer during the direct chill casting process. The results show that under the effect of the low frequency electromagnetic field, the surface quality of ingot is improved, the structure of the ingot is refined, and the thickness of segregation layer is decreased.

Abstract: On the basis of conventional level casting, low frequency electromagnetic field is applied during conventional level casting process. Effects of low frequency electromagnetic field on melt flow, macrostructure and microstructure have been studied. The experiment is performed on the Al-4.5% Cu alloy, and the experimental results show that with the application of the low frequency electromagnetic field, the macrostructure and microstructure are changed greatly. The reasons for the low frequency electromagnetic field changing the macrostructure and microstructure of the ingot were summarized.