ANALYSIS OF THE INFLUENCE OF HARMFUL ELEMENTS ON THE QUALITY OF CASTINGS IN GREY CAST IRON MELTING
Keywords:
Grey cast iron, S, Al, Zr, Ti, induction furnace, high superheating in the furnace, preconditioning.Abstract
The article proposes a three-stage model for the formation of flake graphite based on [(Mn, X)S-type crystalline nuclei]. In this model, three important groups of elements are involved: • deoxidizing elements, • Mn and S, • modifying elements. During the pre-treatment of the molten metal, various materials—such as carbon materials and metallurgical silicon carbide—are used to control the level of oxidation and to promote the formation of active graphite nucleation sites.
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