Investigated effect of high temperature thermo-mechanical (HTTM) treatment and austempering combinations on structure and wear resistance of low- silicon ADI. Showing strong positive influence of combined use of austempering processes and HTTM treatment on the wear ADI. Established for the investigated compositions of ADI it is revealed the possibility of control by the degree and mechanism transformation of austenite in the intermediate temperature range; the optimum combination of high strength and good wear resistant properties of ADI is caused by the ultrafine bainite structure and variable content of retained austenite. Implementation of the works have allowed us to determine the optimal conditions of deformation and subsequent austempering of the ductile irons which provide maximum wear-resistance and fatigue properties. This will allow us to develop new production processes, reduce the costs of production, improve the reliability of gears, and prolong their service life.Investigated effect of high-temperature treatment (HTTM) and austempering combinations on structure and wear resistance of low-silicon ADI. It showed strong positive influence of combined use of austempering processes and HTTM treatment on the wear ADI. Established that, for the investigated compositions of ADI it is revealed the possibility of control by the degree and mechanism transformation of austenite in the intermediate temperature rang; the optimum combination of high strength and good wear resistant properties of ADI is caused by the ultrafine bainite structure and the variable content of retained austenite. Implementation of the works have allowed us to determine the optimal conditions of deformation and subsequent austempering of the ductile irons which provide maximum wear-resistance and fatigue properties. This will allow us to develop new production processes, to reduce the costs of production, to improve the reliability of gears, to prolong their service life.