Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
MICROHARDNESS BEHAIVOUR FOR TiSiN/AlCrN AFTER HIGHT TEMPETRURE TRIBOLIGICAL TEST
Submission Author:
Carlos Bernardo Pereira , PR , Brazil
Co-Authors:
Carlos Bernardo Pereira, Ricardo Torres, Paulo Soares
Presenter: Carlos Bernardo Pereira
doi://10.26678/ABCM.COBEM2017.COB17-2142
Abstract
Coated tools are largely used at metallurgical industry, for they can improve the productivity of the machining process. During the machine process, the temperature at tool can raise up to 1000°C in some points, because that is important to know how the material works at this temperature. The goal of this research was to evaluate temperature and tribological effect on coating hardness behavior of TiSiN/AlCrN coating. To accomplish this work, samples are produced with coating WC-Co disks with TiSiN/AlCrN by CAE/PVD processes to obtain a commercial coating used on cutting tools. The coating has micro hardness, adhesion tested before and after the tribological test, to be sure no issue regarding adhesion can modify the tribological result. The wear test was done using a Pin-on-disk test where the sample was tested at 20°C, 500°C and 800°C. The microhardness was measured by Knop technique, with different loads from 25 gr to 1000 gr and penetration at each sample. After that, they were submitted to a tribological test. Measurement was done at the surface of the coating and in the wear track to analyze if there are any changes in the coating’s microhardness, due to the temperature and the load applied on coating during tribological test. The results show there are no changes in the microhardness profile when compared to the original microhardness coating, though there was an oxidation of the coating tested at 800ºC.
Keywords
TiSiN/AlCrN, Microhardness, Helica
