المجلة الجزائرية للعلوم

Impact Of Burnishing On Sk, Svk, Spk And Wear Behavior Of Cr–mo Steel.

Auteurs : Achouri Sihem . Mounira Bourebia . Soumaya Meddah .

Résumé

This work focuses on investigating the influence of burnishing parameters, such as load and number of passes, on core roughness depth (Sk), reduced valley depth (Svk), and core height. reduced peak (Spk) of chrome-molybdenum steel. The tribological tests were carried out under lubrication. By examining the 3D morphology of the wear grooves for the lowest loads and number of passes, we observed wider and deeper grooves compared to those observed for other values. Analysis of Sk values , Svk and Spk shows that increasing the load and the number of passes during burnishing tends to reduce Sk, while increasing Svk and Spk. The burnishing-treated samples show improved wear characteristics compared to the untreated sample, with a notable reduction in Sk, Svk, and Spk values. The worn surfaces of chrome-molybdenum steel were analyzed by scanning electron microscopy in order to highlight the wear mechanisms under the experimental conditions studied. We observed the presence of grooves parallel to the sliding direction, produced by abrasive and adhesive wear, caused by delamination of the contact surface due to hard debris resulting from wear and plastic deformation of the asperities of the surface. These observations are in good agreement with the 3D profiles and the values of Sk, Svk and Spk.

Mots clés

Chrome molybdenum steel, Burnishing, Friction, Lubrication, Core Roughness Depth,Reduced Valley Depth, Reduced Peak Height.