BORIDED HOT-WORKED POWDER MATERIALS BASED ON IRON. I. KINETICS OF DIFFUSION BORIDING FOR POWDER MATERIALS

摘要

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