Microstructure and dry sliding wear properties of 3Si-2Ni and 3Si-2Mn powder metallurgy steels with different graphite content

Tekeli S., Gural A., Ozyurek D.

Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, vol.225, no.8, pp.814-820, 2011 (SCI-Expanded) identifier identifier


In this study, plain iron powder (ASC.100.29) was mixed with 0.35-1.1% graphite +3%Si+2%Ni and 0.35-1.1% graphite+3%Si+2%Mn powders. While coarse pearlitic structure with homogeneous distribution of Mn was obtained in Mn-added specimens, Ni-rich austenitic areas with divorced pearlite structure were observed in Ni-added specimens. Wear tests were carried out at a load of 50 N. The experimental results showed that the highest wear resistance was obtained in the Ni-added specimen. While subsurface brittle cracking caused more wear in the Mn-added specimens, the wear occured by plastic deformation of surface Ni-added specimens.