INTRAFORM CAST-IRON MODIFICATION. IMPACT STUDIES OF SILICON CARBIDE MODIFIERS ON CRYTALLIZATION OF GREY IRON. REPORT 1

The paper presents the impact studies of silicon carbide and protector metal modifiers on crystallization of grey iron by intraform modification. The modifiers in the form of powder have been obtained in overlapped processing of carbide with metals (chromium and zirconium) in planet-centrifugal activators. Using organic bands or copper powder, 8 – 25 mm in diameter tablets have been formed. The introduction of modifiers numbering 0.05 % (active phase) leads to the ratio changes between ferrite and pearlite up to the full removal of ferrite components, as well as it changes the distribution of graphite inclusions. The application of compacted modifiers is much more preferable.

graphite, silicon carbide, crystallization, casting mold, protector metal, pearlite, planet-centrifugal activator, ultimate fracture strength, grey iron, solidity, ferrite, chromium, zirconium

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