Oleynik I. Increase abrasive and impact-abrasive wear resistance of steels and irons for metastable austenite expense

Investigations object - the new eсonomic wear resistance cast-irons which impact-abrasive wear resistance. Purpose of investigations - is devoted to a creation of new economic wear resistance cast-irons with metastable austenite. Research techniques - metalografic, X-raying analysis, durometric investigations, and testes of mechanical properties and mathematical processing results of investigations. The cast-irons strengthening during operation at the phase transformation deformation which result in the surface layers of parts, and methods of for substitute of the espensive cast-irons. The high impact - abrasive wear resistance of new cast-irons is achieved, thanks to development of the deformation phase transformations (DPT) (martensitic, dynamic deformation againg), which resulting in the surface layers of the parts under cartful-action of abrasive and cast-irons be strengthened in the process of operation. The phase structure and kinetic of DPT during impact - abrasive wear regulating by alloys and modes of heat treatment. The correlation established between kinetic of DPT by wear and forming impact -abrasive wear resistance of developed cast-irons. The intensity of DPT increasing, the intensity of wear diminishing, and the impact -abrasive wear resistance of cast-irons increasing. The impact -abrasive wear are proportional to the quantity of the hard phases (martensite and carbides), that forming in the surface layers of the cast-irons because of DPT in the process of wear. The results of dissertation have passed the industrial inculcation and approlation. The economic effect made 40228 grn.