Forging process

A method of producing a unitary workpiece from at least two components of different materials comprising the steps of forming one of said components as a body made of a smelt-metallurgical material, forming the other of said components as a pressed and presintered forming member made of a powder-metallurgical material, one of said members having a conically tapering hole and the other of said members having a conformingly tapered plug adapted to fit in said hole in close contact therewith, thereafter locating said components in respective die-halves of a forging press in a hole and plur interconnecting arrangement, said die-halves having both radial and axial restriction surfaces for each of said components and thereafter forging said components into a desired shape by relative axial movement of said die-halves to compress the axial distance therebetween and under such conditions of heat and pressure as to upset the material of each of said components at least along the juncture of their interconnection in both the radial and axial direction to simultaneously form a welded bond therebetween.