Influence of surface topography and surface modifications on seizure initiation in lean lubricated sliding contacts
2007 (English)In: Wear, ISSN 0043-1648, E-ISSN 1873-2577, Vol. 262, 986-995 p.Article in journal (Refereed) Published
Seizure initiation in lean-lubricated contacts was experimentally studied using a transient test method of ball-on-disc type at two different sliding velocities, 2 and 3.8 m/s. Four different nodular cast iron surfaces were tested against a bearing ball of 100Cr6 steel: a fine-milled and roller-burnished surface, a ground and lapped surface, a ground and lapped laser-melted surface, and finally a ground surface. The results show that the ground surface, even though it is smoother than the fine-milled and roller-burn i shed surface, shows indications of seizure at a lower load. No graphite nodules from the nodular cast iron were visible in the surfaces on inspection with an optical light microscope. In contrast, the ground and lapped surface suffered no initial or total seizure in these tests. In this case, many graphite nodules were visible in the surface, and these nodules became detached in the contact zone, where they probably acted as a solid lubricant. Many graphite nodules were also visible in the ground and laser-melted surface, though in this case the graphite nodules did not become detached. This surface topography initiated seizure under a low normal load, and increased sliding velocity lowered the total seizure load significantly.
Place, publisher, year, edition, pages
2007. Vol. 262, 986-995 p.
seizure, surface topography, sliding velocity, lubrication, nodular cast iron
Reliability and Maintenance
IdentifiersURN: urn:nbn:se:kth:diva-11577DOI: 10.1016/j.wear.2006.10.014ISI: 000245063500026ScopusID: 2-s2.0-33847060484OAI: oai:DiVA.org:kth-11577DiVA: diva2:277797
QC 201007212009-11-202009-11-202010-11-18Bibliographically approved