The structure and phase composition of hard alloys of the Cr3C2-Ti system produced by explosive compacting of powders

The work presents the findings of theoretical and experimental studies by scanning electron microscopy and energy-dispersive electron microprobe analysis of the phase composition of hard alloys produced by explosive compacting of the powders of chromium carbide Cr3C2 with titanium. It was found that when the powder mixture is heated in shock waves to 660 °C, the phase composition of hard alloys corresponds to that of the initial components of the powder mixture. With the increasing intensity of the explosive compacting, formation of secondary carbides is observed on the border of the initial components. A further increase in temperature results in a local melting and formation of new fine phases. With the subsequent temperature rise in the shock waves, a transition to the calculated equilibrium composition is observed.