Wear mechanisms and wear resistance of austempered ductile iron in reciprocal sliding contact

Austempered ductile irons (ADIs) are used in applications commonly exposed to severe contact conditions, and as a consequence wear damage frequently followed by failure of components. Hence, resistance the material governs final life time component. In present work, sliding two ausferritic spheroidal graphite ADI1 ADI2 mining construction equipment was investigated. were heat treated similar strength, volume fraction carbon-rich austenite around 30% 16%, respectively, they both contained 10 – 13% nodular graphite. The tests performed using slider-on-flat-surface (SOFS) tribometer. Case-hardened steel plates made high strength steel, 22NiCrMo12–F, counterface. conducted under lubricated at normal loads 50, 100, 200 300 N, each load level m. friction force between contacting surfaces continuously monitored during sliding. lubrication investigation mineral-oil-based paste where frictional heating is generated. Wear mechanisms tested specimens investigated means optical scanning electron microscopy X-ray diffraction, quantified 3D-profile interferometer. main mechanisms, plastic deformation surface delamination, discussed concerning test conditions properties. grade with higher displayed better loads. promoted larger beneath initiated transformation into hard martensite. Thus, it concluded that increase due formation marteniste. On other hand, silicon content showed lower This associated cracking proeutectoid ferrite presented ADI2.