Eventos Anais de eventos
CONEM 2018
X Congresso Nacional de Engenharia Mecânica
CHARACTERIZATION GRAY CAST IRON APPLIED IN BRAKE DISCS UTILITY VEHICLES
Submission Author:
Sérgio Brandão , GO
Co-Authors:
Sérgio Brandão
Presenter: Sérgio Brandão
doi://10.26678/ABCM.CONEM2018.CON18-1428
Abstract
Gray cast iron has been widely used in the manufacture of brake discs of automotive systems from new vehicles. With its development, there has also been a growth in the supply of this type of components with different manufacturers, besides the diversification of the geometries to intensify the heat dissipation to the environment. This study aims to characterize the Brinell microstructures and hardness of new and used brake discs from two different manufacturers applied in the same vehicle utility model. Materials characterization is an important task to evaluate the main mechanical properties, the microstructure present, their composition, within a context of relevance to a particular process, product or property.To characterize the brake discs evaluated in this study, microstructural analysis was performed using Optical Microscopy (OM), Scanning Electron Microscopy (SEM), chemical composition with Energy Dispersion Spectroscopy (EDS) and Brinell hardness tests (HB). The results showed that the microstructure of the metallic matrix of the gray cast iron applied in both discs is ferrite + perlite, being the perlite predominant, it was also observed that the morphology of the graphite is of the lamellar type and with distribution AI, according to ISO 945:2008. Some chemical compositions sample were also obtained, which showed consistent results according foreseen literature. In addition, the results of the Brinell hardness analyzes presented similar discs values of both manufacturers, new and used sample discs.
Keywords
Materials Characterization, Cast Iron Gray, Brake Disc
