Browsing by Author "Paredes Zumbana, Jorge Alexandro"

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    Análisis del blindaje del acero AISI 1045 por proyección térmica de aleación micropulverizada Eutalloy 11496 y su influencia en la resistencia al desgaste superficial
    (Universidad Técnica de Ambato, Facultad de Ingeniería Civil y Mecánica. Maestría en Diseño Mecánico, 2017) Paredes Zumbana, Jorge Alexandro; Espín Lagos, Segundo Manuel
    In the present research, shielding tests were carried out on three surfaces of different roughness, which have as substrate the AISI 1045 steel, extracted from a cane miller. The three types of roughness were obtained by means of the processes of mechanical polishing with abrasive disc, sandblasting with mineral abrasive of volcanic nature and metallic blasting. The shielding material was the Eutalloy micropulverized alloy 11496, applied by means of the flame thermal projection technique. Shielded samples were subjected to abrasion wear tests and accelerated corrosion wear in a salt spray chamber; The results indicate that the best resistance to abrasive wear occurs in samples prepared superficially by sandblasting, which have a surface preheating between 320 and 420 ° C, to achieve a suitable anchorage of the metal alloy. The results of accelerated corrosion showed the highest corrosion rates in the unshielded substrate and it was also evidenced that the corrosion resistance in the shielding is good as long as there are no surface defects. Finally, a procedure proposal is proposed for the shielding of a cane mill tipping machine, in order to ensure that its useful life is favorable to milling with a duration of 8 months.