Abstract
Steel 30 KhG was used as a base for studying the effect of microalloying vanadium, niobium and titanium on structure and property formation of medium-carbon chromium-manganese steel after hot working. The steel microstructure parameters were analyzed using regression equations and included: volume fraction of pearlite, average pearlite grain size, pearlite microhardness and ferrite microhardness. The combined microalloying additives to steel type 30KhG was found to be unidirectional, not additive, and resulted in a redistribution of nitrogen between precipitating carbonitride phases, a change in the temperature range for their precipitation, and an increase in nitrogen content.
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