Разработка параметров термоупрочнения катаных мелющих шаров повышенной эксплуатационной стойкости / Ф. К. Ткаченко, В. Г. Ефременко, С. О.Кузьмин, О. И. Труфанова // Захист металургійних машин від поломок: зб. наукових праць / ПДТУ. - Маріуполь, 2010. - Вип. 12. - С.244-249.
The particularities of the shaping of microstructure of rail steels of marks М74 and 75ХГСМ under continuous cooling with different velocities from austenite interval of temperature are described; the temperature borders of the areas of phase transformations are presented.
The effect of the regime of heat treatment with interrupted quenching on the properties of balls 80 mm in diameter produced from low-alloy chromium-bearing steel is investigated. It is shown that in the case of through hardening that provides a hardness of over 52 HRC e the balls crack over the entire cross section after the self-tempering finishes. The susceptibility of cracking increases when the time of residence of the balls in the quenching medium is increased and the cooling in the stage of self-tempering is accelerated.
The effect of various tempering regimes on the structure and operating properties of white chromium cast iron hardened at different temperatures is investigated.
The thermodynamics and kinetics of pearlitic transformation in steels have been examined to determine whether pearlitic transformation in carbon steel has its own individual temperature region and to establish the reasons for the reduction in the rate of pearlitic transformation when alloying elements having different effects on carbon diffusion are introduced.
Composition-property diagrams obtained in using the simplex-lattice method of experiment planning for manganese steels on varying the elements within the range from 6.0 to 8.0% of Mn and 0.05–0.60% of C make it possible to optimize steel compositions with respect to mechanical properties.
The crystalline structure defects of tool steels created by cold hydroextrusion in the ferrite-pearlite condition are characterized by high thermal stability. The alloy content of the worked material and the presence of excess carbide phase promote preservation of this stability.
Tempering at 550–650°C leads to refinement of the structure and a change in the phase composition of hardened G8 steel.