Technological special features of manufacturing cast iron billets for parts of blow glass-forming molds

One of the important branches of the macroeconomics and industry, which satisfies the various needs of numerous industries, is the glass container production. In order to be competitive, it needs developments and strategies based on new trends and solutions that will significantly increase production volumes and reduce the cost of products, both at the industry level and at individual enterprises. One of the technological problems faced by manufacturers of glass packaging products is the low stability of mold sets for the production under difficult thermocyclic conditions, which, in turn, prompts the adjustment of the properties of the materials for the molds.

This paper presents the results of investigation into the methods of forming a directed gradient structure with ferrite metal matrix in cast iron billets for molds. Additional treatment of heat-resistant silicon cast iron with SB5 inoculator and VL63(М) modifier was studied. A metallographic study was carried out, and the mechanical properties of structural components were determined.

The technological recommendations for the production of cast billets from heat-resistant silicon ferritic cast iron for the parts of mold sets.

It is found out that the use of the combined effect of ladle treatment and mold parts with enhanced thermalphysic properties leads to the formation of target structure of both metal matrix and graphite inclusions in the cast billets. Lamellar graphite inclusions were observed; their shape and morphology changed from fine interdendritic to uniformly distributed across the cross section. In addition, fine inclusions of spherical graphite, which transferred into lamellar one, were observed in the working layer of the billet of the second mold set.