Bainitic reaction kinetics in ductile iron contained according to Ukrainian standard (weight %) 3.603.80 carbon, 2.60-2.80 Si, 0.12 Mn, 0.60 Cu and additionally alloyed by Mo (0.15-0.20) has been studied. It was found that the overall transformation kinetics becomes slower as transformation temperature increase. This is because more intensive redistribution of carbon into austenite at higher te...

Abstract Thermomechanical processing consisted of hot-rolling in the austenitic region with deformation both above and below non-recrystallization temperature. Immediately after rolling, specimens were directly quenched water to three different temperatures 560 °C, 420 °C room The first two samples, which 560° C 420°C, immediately cooled slowly furnace. microstructure samples mostly comprised u...

The first evidence is provided for the existence of a tetragonal or slightly orthorhombic unit cell of bainitic ferrite. It supports the hypothesis that the excess carbon that persists in the ferrite, which is in contact with austenite, is a consequence of an increased solubility due to the change in symmetry from the conventional cubic unit cell. The deviations from the cubic cell are maintain...

In this study, the sliding wear of a DIN 18MnCrSiMo6-4 continuous cooling bainitic steel plasma nitrided with nitrogen rich gas composition was investigated. To evaluate influence processing time and temperature on mechanical microstructural characteristics layer, samples were at 400, 450, 500 550 °C for 3, 6 9 h. The produced layers characterized concerning microstructure, phase composition, m...

In this study, the effects of Mo and Nb on microstructure Charpy impact properties coarse-grain heat affected zone (CGHAZ) in high-strength low-alloy (HSLA) steels were investigated. The high-Mo steel had a lower volume fraction acicular ferrite (AF) higher granular bainite (GB) than those low steel. CGHAZ specimen AF GB compared to low-Mo specimen. This is because, an increase lowers transform...