WEAR MECHANISM OF PISTON CYLINDER LINER PAIRING MADE OF CAST IRON-COMPOSITE MATERIAL REINFORCED WITH AL2O3 FIBERS PLACED TANGENTIAL TO WEAR SURFACE
Journal Title: Tribologia - Year 2010, Vol 233, Issue 5
Abstract
The wear mechanism of piston ring-cylinder liner pairing produced from cast iron and eutectic silumine reinforced with alumina fibers has been presented in this paper. Grey or spheroid cast iron is used for the production of piston rings and composite material is used for cylinder liners of combustion engines. EN-AC-4700 –alloy is the matrix of composite and alumina fibers are the reinforcing phase. The function of the reinforcing phase is the decrease of the tendency to adhesion tacking between cast iron and the aluminium matrix. During sliding, the contact exists between cast iron and alumina fibers protruding over the matrix surface. The content of fibers and their orientation to the friction surface determine the level of local stresses and stains, which exercise a significant influence on friction forces and the wear of pairing. The calculated results of local stresses and strains made by MES on the model are presented. The fibers in this model are oriented tangentially to the friction surface and perpendicularly to the direction of movement.<br/><br/>
Authors and Affiliations
Andrzej Posmyk, Henryk Bąkowski
Keywords
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