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Abstract
Cylindrical parts made from pre-strengthened Fe–Cu–C and Fe–Zn–C powders, fabricated under 1000 MPa-cold press, were welded in a vacuum furnace at different temperatures by diffusion welding. A novel approach was used where powder metallurgy parts were sintered together with diffusion welding with no extra pressure applied during the welding process. Chemical composition, cold press pressure, and sintering time (consequently welding time) were constant during the experimental works. Samples were examined by means of optical microscopy for metallographic inspection and by energy dispersive spectroscopy for compositional analysis. The shear strength and hardness profiles of joints were determined. It was observed that shear strength and hardness values of welding increased with increasing welding temperature.