Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Ceramics cutting tools apply on dry turning of gray and nodular cast iron
Submission Author:
Taise Azevedo de Sousa , SP
Co-Authors:
Taise Azevedo de Sousa
doi://10.26678/ABCM.COBEM2017.COB17-2830
Abstract
The goal of this work was to compare the cutting performance of the alumina (Al2O3) and silicon nitride (Si3N4) inserts under dry cutting environment on nodular and gray cast iron using the cutting speed (Vc) of 500 m/min, feed rate (f) of 0.25 and 0.33 mm/rev and depth of cut (ap) of 0.50 and 1.0 mm respectively. Tools performance was evaluated with respect at tool wear, temperature, surface finish produced and cutting forces generated during dry turning, using light optical microscopy (LOM), non-contact infrared pyrometer, surface roughness meter and dynamometer with data acquisition system respectively. Higher micro hardness of silicon nitride samples (1760 HV) compared to alumina (1530 HV) is observed and depicts better resistance against abrasion. The tool life of Si3N4 insert is found to be better than the Al2O3 insert with cutting length above of 10500 meters. The dominant wear mechanism was found to be abrasion with progression of wear was steady. In the general, we can attribute the favorable cutting performance of cutting to effect positive of graphite as solid lubrificant, besides of the research have shown high efficiency of dry cutting due to not harmful to the environment in comparison with traditional technologies using cutting fluids.
Keywords
Si3N4 and Al2O3 cutting tools, Flank wear, gray cast iron, Nodular Cast Iron
