DIFFUSION BONDING OF HARDMETALS (WC-CO) WITH METALLIC INTERLAYERS

Diffusion bonding of hardmetals (WC-Co) to themselves or with other me tallic material (mild-steel) has been evaluated in the present paper. Metallographic studies and mechanical tests have been used to determin ate the influence of the bonding parameters (temperature, pressure and time) on the bond microstructure and strength. Different metallic int erlayers applied in form of thick foils were used (nickel, nickel-copp er and stainless steel). Special interest was dedicated to the solid s tate reactions occurred in the bond interfaces.