Ingeniería Civil y Mecánica

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Subject: search.filters.subject.DUREZA SHORE

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    Análisis del desgaste abrasivo en los aceros inoxidables AISI 304, AISI 316 y AISI 420, en un medio acuoso evaluado bajo la norma ASTM G105-20
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2024-02) Barragán Moreta, Cristina Alejandra; Vaca Ortega, Wilson Henry
    Stainless steels are widely used in industry for their corrosion resistance capacity, but abrasive wear is not taken into account in these materials. This lack of consideration can lead to an incomplete view of the performance of these materials in industrial environments. In this research, tests were carried out on AISI 304, AISI 316 and AISI 420 stainless steels, under the ASTM G105-20 standard, to address this problem. For this, tests were carried out on 5 specimens of each material for each disk of Shore A50 and Shore A70 hardness. In these tests, standardized parameters and conditions were applied, such as the rotation speed of the discs, which in this case is 350 rpm, applied load of 222 N, an abrasive mixture of 1.5 kg of silica sand and 0.94 kg of water, each of the specimens were subjected to wear in an aqueous medium for five time intervals of 3 minutes, followed by weighing to determine the amount of material lost in grams. With the results, it can be determined that both abrasive wear and the speed of abrasive wear are lower in AISI 420 stainless steel and higher in AISI 304 and AISI 316 stainless steels, due to their respective hardness. It was also determined that the speed of abrasive wear with each disc and in each time interval was similarly constant, while the abrasive wear increased gradually.
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    Estudio de las propiedades de componentes termoplásticos, obtenidos a partir de la resina ingeniería-tough y resina standard en orientación paralela, mediante la aplicación de la técnica aditiva para impresión 3D (SLA)
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2021-07) Yumbolema Narváez, Darío Javier; Pérez Salinas, Cristian Fabian
    The present experimental work was focused on the study of the properties obtained from a thermoplastic component obtained by applying the additive technique of 3D printing SLA. The specimens were obtained by applying a high-power laser beam in order to harden the liquid resin to form the desired three-dimensional elements, that is, Type I and Type II specimens, which are used in Hardness and wear tests respectively. For the elaboration of these samples, two types of components were taken into account, standard resin and Ingenieril Tough resin with the aim of making a simultaneous comparison between them after the stereolithographic process. In determining the weight, a digital analytical balance of thousandths of grams in precision STX 223 OHAUS recommended by the ISO 9352 standard of abrasive wheel wear was used; the data on wear was carried out in the Taber Type Abrasion tester with the abrasive wheels H22. The Hardness test was performed using the Shore D Durometer and the ASTM D2240 standard in the Laboratory of the Technical University of Ambato.