Influence of carbon on the structural-phase composition and hardness of steel ingots of the Fe-Cr-Mo-N-C system obtained by the SHS method under nitrogen pressure

The possibility of obtaining solid ingots (without gas porosity in the volume) from high-nitrogen steel Fe-Cr-Mo-N-C system by method self-propagating high-temperature synthesis under nitrogen pressure is shown present paper. It has been established that with an increase mass fraction carbon 0.09 % to 0.30 as-cast metal, hardness metal increases. At same time, structural-phase composition consists a pseudo-pearlitic structure (ferrite-nitride mixture) and austenitic different ratios since content leads amount pseudo-pearlite. heat treatment specimens at 1250°C for two hours their complete austenization. In this case, steels both compositions decreases 22 – 24 HRC (0.09 wt.% carbon) 28 30 (0.30 carbon).