Borided hot-worked powder materials based on iron. I. Kinetics of diffusion boriding for powder materials

The effect of diffusion boriding temperature and time, hot-worked powder billet porosity, and the carbon content within them, on borided layer thickness is studied. A difference is established in impregnation at the temperature for eutectic formation in the system Fe - B within the surface layer of a billet from boriding in the absence of a liquid phase. The processes are conditionally called liquid-phase and solid-phase boriding. The difference involves a higher impregnation rate and the possibility of porous billet infiltration with melt during liquid-phase boriding. Optimum production parameters are determined for boriding.