A sintered material based on pre-alloyed powders (Fe-Ni-Mo) is expansively applied in
the automotive industry and Distaloy is today the most widely used raw material worldwide for the
production of complex, precise, high strength PM machine parts. In this study a diffusion bonded
powder type of Distaloy DC (Fe-2 wt. % Ni-1.5 wt. % Mo, Höganäs-Sweden) was used. It was
alloyed by 0.5 and 1 wt. % silicon carbide with the addition of 0.6 wt. % lubricant in the form of
introlube®. All the powder mixtures were compacted at 600 MPa, and then sintered for 30 min. in
argon atmosphere at 1120° C. After the completed sintering process, the sintered alloy samples
were gas-nitrided 1h at 490 °C and 6h at 540 °C, respectively, and cooled slowly to room
temperature still under the ammonia atmosphere. The effects of varied amounts of SiC particles on
the tribological behavior of nitrided-sintered Distaloy DC composites were investigated.
Keywords: Distaloy DC, nitriding, SiC, sintered steel, wear.