Examinando por Materia "Desgaste"
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- PublicaciónRestringidoAnálisis de la influencia de las variables: carga normal, dureza del material y rugosidad en el comportamiento al desgaste de un acero AISI 1045, utilizando el ensayo Pin-on-disk(Universidad de Ibagué, 2018) Macías Tole, Cristian Andrés; Pérez Ruiz, Eduardo AlbertoThe aim of this grade work is to show the tribological behaviour of AISI-SAE 1045 steel subjected to wear test under ASTM G-99 standard, using different variables for testing among them: contact load, roughness and hardness. Within the tests to know the mechanical behaviour, the indentation test stands out, with which it is possible to identify specific properties in a material. However, for the evaluation of the wear behavior present in the study steel, it is necessary to consider the application of normal loads to the surface of the body under study, thus achieving to reproduce the contact and relative movement of the bodies. In order to study the behavior of AISI 1045 steel in commercial state and change of hardness obtained through thermal treatment, it was necessary to use a pin on disk sliding wear machine (ASTM G-99). The experimental work is carried out with a tribological pair of steel AISI-SAE 1045. This pair was machined, and polished with sandpapers by means of a rotary polisher until obtaining a surface with a roughness of 0,15; 0,48; 0,7μm. The loads used in the experimental tests are: 10N; 15N; 20N respectively; The tests are carried out with a sliding distance of 1000 m according to the ASTM G-99 standard. The behavior of the coefficient of friction with respect to the time and the sliding distance was studied, as well as the loss of mass in each one of the pins; the obtained data are compared with what is found in the literature, which are within the range of the studies of coefficient of friction between steel and steel reported by the literature.
- PublicaciónAcceso abiertoRediseño e instrumentación del banco para la medición de desgaste abrasivo bajo la norma ASTM G-65 de la Universidad de Ibagué(Universidad de Ibagué, 2019) Murcia Yara, Marcos Esgar; Pérez, EduardoThe most frequent wear that occurs in machine elements is abrasive wear, which, as a consequence of irregularities in counter-bodies, the detachment of particles from the surface or the action of external agents, leads to the appearance of grooves and the deterioration of the surface of materials. For the analysis of this phenomenon, the University of Ibagué has a wear test bench under the ASTM G-65 [1] standard, which presents problems in the reproduction of the test due to its design, in addition to not having instrumentation that allows the measurement of variables of interest such as test time, friction force (coefficient of friction) and contact temperature. The purpose of this project is to mechanically redesign the structural components, which so far affect the reliability of the results obtained in the tests, as is the case of the abrasive storage and dosage system, the system of assembly, disassembly and fixation of work loads, among others. It also seeks to select and install the instrumentation required for the measurement and subsequent analysis of variables related to the wear behavior of the materials mentioned above. Once the bench is redesigned and instrumented, wear tests will be performed to verify the functionality and easy operation of the bench.