Фазовый состав, микроструктура и микротвердость высокоазотистой аустенитной стали Х23АГ17, состаренной при температурах 600°С и 700°С

Abstract

We studied the effect of age-hardening at temperatures of 600°C and 700°C (0,5, 1, 2, 5, 10, 50 h) on the phase composition, microstructure and microhardness of high nitrogen austenitic steel Fe-23Cr-17Mn-0,1C0,6N. Age-hardening at the temperatures of 600°C and 700°C is accompanied by the formation of microstructures consisting of two types of grains: grains in which phase decomposition occurred with the release of Cr2(N,C) and [sigma]-phase particles, as well as austenitic grains, not undergone phase decomposition. At temperature of 700°C, the process of phase decomposition realizes more intensive when compared to agehardening at 600°C. Grains, which have undergone phase decomposition, have higher microhardness values in comparison with undecomposed grains.