Features of Structure Formation, Kinetics of Phase Transformations, Mechanical and Tribological Properties of the Fe-Based Cr–Mn–Ni Alloys

The paper reviews and analyses solutions of theoretical and practical problem consisting in increasing the complex of tribological properties and heat resistance of the iron-based alloys for the state-of-the-art mechanical engineering industry. A composition of new sparingly alloyed wear-resistant iron-based chromium–manganese–nickel alloys is developed. The distribution of the alloying elements between phases and structural components is studied, the dependence of change of mechanical properties on structural parameters and phase composition is determined. For the first time, the kinetics of bainitic transformation and the regularities of forming a nanostructured bainitic matrix of Fe-based Cr–Mn–Ni alloys are investigated by means of dilatometric analysis. Diagrams of isothermal decomposition of supercooled austenite are plotted. Tribological properties of as-cast Cr–Mn–Ni alloys are studied.