QUALITY ASSURANCE OF DUCTILE CAST IRONS
The relationship between the structure of the metal base and the shape and size of graphite inclusions is shown. It is shown that the quality of ductile cast irons when obtaining the required grade implies the correct balance of the ratio of pearlite and ferrite, as well as the degree of spheroi-dization of graphite in the structure of cast iron. The influence of the silicon content on the mechanical characteristics and casting properties of ductile cast irons has been investigated.