Análisis de revestimientos duros aplicados por proceso SMAW sobre acero al carbono A36 y su incidencia en el desgaste abrasivo evaluado bajo la norma ASTM G-65

Abstract

This experimental work has as main objective: Analyze the hard coatings applied by the SMAW process on carbon steel A36 and its incidence in the abrasive wear evaluated under the ASTM G-6 standard, for which 72 x 60 x 12 mm specimens were manufactured , were coated with three types of Indura brand electrodes, 10 specimens were coated with chromium carbide based electrode (Overlay - 62), 5 with one pass and 5 with two passes, the same procedure was performed with the electrodes based on Martensitic alloys (Antifrix-450) and with the electrodes based on Austenitic alloys high in manganese. The machine in which the abrasive wear tests were carried out established the parameters of the ASTM G-65 standard. The metallography tests helped to verify their microstructure in each type of electrode, hardness and spectrometry tests were also carried out to obtain their percentage in chemical composition, in order to analyze the parameters that provide better resistance to wear. Finally the samples were weighed to obtain the difference of mass loss (g) and calculate the volumetric losses in each one of the cases, with which it was possible to determine that the smaller volumetric loss was obtained with the electro-Overlay-62 with a volumetric loss of 49.909mm3 and 41.697 mm3 with one and two passes respectively the second best result was with the Weldmang-14 electrode with a volumetric loss of 74.58 mm3 and 65.189 mm3with one and two passes respectively, The electrode that did not provide good characteristics for wear resistance was the Antifrix-450 electrode with a loss of 305.548mm3 and 274.876 with one and two passes respectively