Efecto de la granulometría frente al desgaste producido por un compuesto de matriz metálica en acero 316 reforzado con TiC sinterizado mediante plasma

Abstract

This research presents an analysis of the coefficient behavior of the dry wear of a metal matrix composite (MMC) in stainless steel 316 reinforced with particles of Titanium Carbide (TiC) according to ASTM G99 standard [1], in a pin-on-disc tribo meter. This study tests the granulometry effects on the MMC manufactured with 3% in volume of TiC, in samples compacted at 700 MPa and sintered through the abnormal glow discharge, at a temperature of 1200°C ± 5 ºC, with a protection atmosphere H2 – N2 and a permanence time of 30 minutes.

This research has demonstrated that the best wear behavior is obtained for the granulometry; as a result of the mixture milling process for 80 minutes . Under this parameter a highest density, a smaller size of pore and a low coefficient of friction were got, guaranteeing that the incorporation of ceramic particles (TiC) in a matrix of austenitic steel (316) shows significant improvements in the resistance to the wear, behavior observed in the topographical analysis and in the footprint profile by obtaining the least depth.