Análisis de falla de elementos de transmisión obtenidos de DINISSAN

Abstract

In this project, failure analysis is presented to determine the causes and events that gave rise to the fracture in a differential by means of a study of fatigue and fracture. The analysis was performed by cutting a highly affected sample, in which a roughing was done through a sanding process to obtain a mirror shine on the surface, in addition to a chemical attack to achieve more accurate parameters in the metallographic analysis. The presence of martensite reave in the form of traces, a ferritic matrix (Gray) and a hardness value under the structure belonging to a steel 1040 or 4140 was observed. The cause of such failure was an erroneous maintenance in the process of lubrication of the pieces, as a thermal treatment of tempering in its manufacture causing a decrease in its hardness, it should be noted that being a purely experimental analysis is not necessary to perform mathematical calculations. (Apartes del texto)