Abrasive wear mechanisms of gray cast iron application to cylinder bore abrasion
- Autores: Luis Alberto Franco Fernández, Amilton Sinatora
- Localización: Proceedings of the VIII Iberian Conference on Tribology: Conference proceedings / Ana Eva Jiménez Ballesta (aut.), Tulia Espinosa Rodríguez (aut.), Noelia Saurín Serrano (aut.), Joaquín Arias Pardilla (aut.), María Dolores Bermúdez Olivares (aut.), 2015, ISBN 978-84-606-8904-1, págs. 95-101
- Idioma: inglés
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Resumen
A significant part of the friction losses in the automotive engine results from the abrasive action of particles formed in the interface between cylinder and piston/rings. Those particles are responsible for axial grooves that are observed in the liners of used engines. The objective of this work was to get a better understanding of the wear mechanisms related to liner/bore grooving and to identify a laboratory testing setup that might reproduce them under controlled conditions. Specimens of Gray Cast Iron (GCI) and of AISI 1070 steel with matrix hardness close to that found in GCI (≈200HV30) were submitted to scratch tests in a tribometer. It was found that scratches performed under 20-50 mN indenter load were similar to grooves observed in cylinder liners. No sharp transition between abrasion mechanisms was observed. Calculation of material removal factor fab from optical profilometry resulted in values with a large dispersion; they could not be associated with different ...
