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Effects of the Microstructures on the Wear Characteristics of Cast irons  

Kim, Sug-Won (Division of New Engineering, RCIT, Engineering Research Institute)
Park, Jin-Sung (Division of New Engineering, RCIT, Engineering Research Institute)
Lee, Hyung-Chul (Division of New Engineering, RCIT, Engineering Research Institute)
Kim, Ki-Kon (Division of New Engineering, RCIT, Engineering Research Institute)
Publication Information
Journal of Korea Foundry Society / v.24, no.6, 2004 , pp. 323-330 More about this Journal
Abstract
This study aims to investigate on the effects of the microstructures on the wear characteristics of the different grey cast iron(GC) and spheroidal ductile cast iron(DCI). Wear test using wear tester of pin-on-disc type was carried out under the conditions of load 47.2N , velocity 0.2m/s, distance 4000m. At the GC, Wear rates depend on graphite type and oxide layer formed at wear surface. Weak rosette graphites are easily broken and formed wear debris over 30 ${\mu}m$. This wear debris occurs scuffing at wear surface. As a result of surface deformation, Narrow regions of the matrix between the graphite flakes and the contact surface lead to the failure of the necks. Wear rate for the DCI depended on hardness of matrix more than size of graphite.
Keywords
Wear; GC; DCI; Graphite type; Oxide layer; Failed neck.;
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