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The wire-feeding spheroidization treatment is important research and how to realize visual control of the process is an unsolved problem all along. In this work, an improved model of cored wire-feeding spheroidization coupled with more proper boundary conditions was developed, in which both the heat transfer effect of Mg-core and steel shell are considered. In our simulation, an implicit time integration scheme was given in the framework of FVM to ensure the convergence of calculations. The reliability performance of the presented model was verified by comparing it with the test of the artificial insertion method. Particularly, the relationship among the temperature of the iron melt, the speed of wire-feeding and melt-explosion depth of cored wire was investigated using our model. In addition, we also study the temperature variation rules at different positions of the cross-section of cored wire, and the effects of parameters on the microstructures and properties of ductile iron could provide theoretical guidance for industrial production.

An improved simulation modelling on the heat transfer process of wire-feeding spheroidization in iron melt