On the role of residual austenite in improving the complex of properties of ductile cast iron

This article is analyzing the prospects and ways to expand field of applying ductile cast iron-high-strength iron in technology. Ductile occupies a special place among structural materials. With same level mechanical properties, having less specific weight than steel, it provides products comparison with steel. reduces consumption raw materials energy resources manufacture operation machines mechanisms. There positive effect both terms economy ecology. In addition, has better casting properties recent years, scientists engineers have focused their efforts on finding new improve complex operational iron. will make possible application obtain additional advantages. A very effective direction – obtaining bainite matrix great amount stable austenite structure by heat treatment allows realize martensitic transformation most loaded parts during thereby increases adaptability. this case, addition traditional type - one-stage isothermal hardening, technology two-stage hardening actively implemented, which for providing more dispersed ferrite structure. fundamentally approach favorable microstructure organization foundry that makes ferrite-austenite mixture directly from state, bypassing separate