Estudio de la variación de la microestructura y su correlación con los valores de microdureza en uniones soldadas de acero SAE 8620

Abstract

The following document presents the results of a comparative, statistical and analytical study between the variation of the microstructure and the values ​​of microhardness tests of welded joints worked in SAE 8620 steel. Due to the use of an optical microscope, an electron microscope Sweep and durometers, a synthesis of all the experimental procedure carried out to prepare the samples is shown. A correlation is executed, having as variables the grain size and the volumetric fraction of phase for five samples. In short, the statistical correlation implemented with the established variables allows a very close coincidence of data with a low percentage of error between the microhardness and the microstructure for all the unions. As previously stated, there are high indices in most Las Correlations, ranging from 71% to 99%, thus creating a linear behavior in which the experimental data are related to the real values ​​of microhardness and microstructure.