Аннотации:
The impact toughness of the quenched 40KhGM steel has been investigated as a function of the heat treatment conditions in the austenitic region. The maximum impact toughness was observed after heating to 1300°C, intermediate annealing at 1050°C, and quenching with low-temperature tempering. According to the results of the fractographic and electron-microscopic examinations, the high impact toughness is due to the specific type of the manganese sulfide precipitation from the γ solid solution. The results of a theoretical estimation of the average sulfur solubility in the γ solid solution are presented. © Nauka/Interperiodica 2007.
