Influencia de la adición de niobio sobre la resistencia al desgaste y a la corrosión de recubrimientos duros a base de hierro y alto cromo

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dc.contributor.advisorPiamba Tulcan, Oscar Edwin
dc.contributor.advisorOlaya Florez, Jhon Jairo
dc.contributor.authorPerez Cepeda, Jaime Andres
dc.contributor.orcidPerez, Jaime [0000000172978663]spa
dc.contributor.researchgroupGrupo de Investigación en Corrosión, Tribologia y Energíaspa
dc.date.accessioned2024-02-28T15:14:24Z
dc.date.available2024-02-28T15:14:24Z
dc.date.issued2024
dc.descriptionilustraciones, diagramasspa
dc.description.abstractEn el campo de los recubrimientos duros es frecuente encontrar aplicaciones que se vean sometidas a procesos de desgaste, por tal motivo, es importante analizar cómo la variación de niobio en el contenido del revestimiento de un electrodo aplicado en un proceso de soldadura por arco con electrodo revestido (shielded metal arc weldind, SMAW por sus siglas en inglés) afecta la microestructura,el desgaste abrasivo, corrosivo, el coeficiente de rozamiento, la dilución y la entrada de calor obtenido con diferentes condiciones eléctricas y numero de capas. Para la realización de este trabajo se aplicaron seis tipos diferentes de recubrimiento de con variaciones de 0, 2, 4, 6 y 8% de Niobio sobre sustratos de acero de baja aleación. Sobre ellos se realizaron ensayos de desgaste por deslizamiento de tipo esfera sobre disco (sphere on disk), desgaste corrosivo EIS (espectroscopia de impedancia Electroquimica), desgaste abrasivo (ASTM G65), medición de dilución en primera capa, obtención de la entrada de calor, donde se obtuvieron los correspondientes]. Además, se analizó la microestructura que se obtuvo de cada uno de los recubrimientos por medio de microscopia óptica y electrónica (SEM), respectivamente. A partir de los ensayos realizados se logró obtener que la mejor condición de aplicación se da con contenido de 2%Nb y parámetros de soldadura de 120 A y 3 capas. (Texto tomado de la fuente)spa
dc.description.abstractIn the field of hard coatings, applications often undergo wear processes, therefore, it is essential to analyze how the variation of niobium in the content of the electrode coating applied in a shielded metal arc welding (SMAW) process affects the microstructure, abrasive and corrosive wear, friction coefficient, dilution, and heat input under different electrical conditions and number of layers. This study applied six different types of coatings with variations of 0, 2, 4, 6, and 8% niobium on low-alloy steel substrates. Wear tests were conducted, including sphere-on-disk sliding wear, corrosive wear using Electrochemical Impedance Spectroscopy (EIS), and abrasive wear (ASTM G65). Dilution measurement in the first layer and heat input were also obtained. The microstructure of each coating was analyzed using optical and electron microscopy (SEM). The results showed that the best application condition is achieved with 2% Nb content and welding parameters of 120 A and 3 layers.eng
dc.description.degreelevelDoctoradospa
dc.description.degreenameDoctor en Ingenieríaspa
dc.description.researchareaSoldaduraspa
dc.format.extentxviii, 175 páginasspa
dc.format.mimetypeapplication/pdfspa
dc.identifier.instnameUniversidad Nacional de Colombiaspa
dc.identifier.reponameRepositorio Institucional Universidad Nacional de Colombiaspa
dc.identifier.repourlhttps://repositorio.unal.edu.co/spa
dc.identifier.urihttps://repositorio.unal.edu.co/handle/unal/85733
dc.language.isospaspa
dc.publisherUniversidad Nacional de Colombiaspa
dc.publisher.branchUniversidad Nacional de Colombia - Sede Bogotáspa
dc.publisher.facultyFacultad de Ingenieríaspa
dc.publisher.placeBogotá, Colombiaspa
dc.publisher.programBogotá - Ingeniería - Doctorado en Ingeniería - Ciencia y Tecnología de Materialesspa
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dc.rights.accessrightsinfo:eu-repo/semantics/openAccessspa
dc.rights.licenseReconocimiento 4.0 Internacionalspa
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/spa
dc.subject.ddc620 - Ingeniería y operaciones afines::622 - Minería y operaciones relacionadasspa
dc.subject.ddc670 - Manufactura::672 - Hierro, acero, otras aleaciones ferrosasspa
dc.subject.lembNiobiospa
dc.subject.lembNiobiumeng
dc.subject.lembSurfaces (technology) - Analysiseng
dc.subject.lembSuperficies (Tecnologia)-Analisisspa
dc.subject.lembAdherenciaspa
dc.subject.lembAdhesioneng
dc.subject.proposalSoldaduraspa
dc.subject.proposalWeldingeng
dc.subject.proposalHardfacingeng
dc.subject.proposalNiobiumeng
dc.subject.proposalSMAWeng
dc.subject.proposalRecubrimientos durosspa
dc.subject.proposalNiobiospa
dc.subject.proposalDesgastespa
dc.subject.proposalWeareng
dc.subject.proposalCorrosiónspa
dc.subject.proposalAbrasiónspa
dc.subject.proposalEntrada de calorspa
dc.subject.proposalDiluciónspa
dc.titleInfluencia de la adición de niobio sobre la resistencia al desgaste y a la corrosión de recubrimientos duros a base de hierro y alto cromospa
dc.title.translatedInfluence of the addition of niobium on the wear resistance and corrosion resistance of hard coatings based on iron and high chromeeng
dc.typeTrabajo de grado - Doctoradospa
dc.type.coarhttp://purl.org/coar/resource_type/c_db06spa
dc.type.coarversionhttp://purl.org/coar/version/c_ab4af688f83e57aaspa
dc.type.contentTextspa
dc.type.driverinfo:eu-repo/semantics/doctoralThesisspa
dc.type.redcolhttp://purl.org/redcol/resource_type/TDspa
dc.type.versioninfo:eu-repo/semantics/acceptedVersionspa
dcterms.audience.professionaldevelopmentEstudiantesspa
dcterms.audience.professionaldevelopmentInvestigadoresspa
dcterms.audience.professionaldevelopmentPúblico generalspa
oaire.accessrightshttp://purl.org/coar/access_right/c_abf2spa

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