Ingeniería Civil y Mecánica

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Subject: search.filters.subject.AISI 1018

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    Evaluación del desgaste de las herramientas de corte y acabado superficial en el fresado del acero inoxidable AISI 304 y acero AISI 1018 utilizando lubricación híbrida (nanofluidos +CO2)
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2024-01) Llumitasig Tubón, Wilmer Alexander; Núñez Núñez, Diego Fernando; Ocaña Guzmán, Adriel Santiago
    The present project focused on the analysis of the effect of the hybrid lubrication method and a Minimum Quantity Lubricant (MQL) system together with Titanium Dioxide and Alumina nanoparticles on the milling process of AISI 1018 and AISI 304 steels, cutting tool flank wear and surface finish, which will be carried out on a CNC milling machine. In this analysis hard metal inserts with PVD TiAlN coating were used, cutting speed is the variable parameter, the recommended and maximum values by the manufacturer were used to establish the experimental combinations, for the hybrid lubrication methods two types of nanoparticles were used, Titanium Dioxide and Alumina for AISI 1018 and AISI 304 steels respectively at a concentration of 0. 5 percent by weight; using a combination of liquid and gaseous CO2 together with the system of minimum amount of lubricant directed to the contact zone of the work material and cutting tool to minimize the friction and temperatures generated in the cutting process. For the evaluation of flank wear and roughness, standard instruments such as the scanning electron microscope, based on the ISO 8688-1 standard specialized in this type of evaluations, and a roughness meter for the measurement of surface quality Ra and Rz were used. After analysis of the results, the surface finish of the steels was improved and the service life of the cutting tools was increased.
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    Análisis de soldadura del acero inoxidable martensítico AISI 420 con acero de medio carbono AISI 1045 y bajo carbono AISI 1018 por soldadura SMAW y su influencia en las propiedades mecánicas
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2020) Acosta Acosta, Christian Javier; Vaca Ortega, Wilson Henry
    The work was carried out with the objective of choosing a suitable electrode to weld a martensitic stainless steel with a medium and low carbon steel in order to generate technological benefits in the industry, as well as study the microstructural changes that may have problems in this material during the welding process which makes it necessary to study the union of these materials. This project was carried out with the SMAW process under the AWS code B4.0 "Standard methods for mechanical welding tests" which establishes the general provisions for the realization of the tensile and impact probes for the joints of AISI 420 stainless steel joints with AISI 1045 medium carbon steel and AISI 1018 low carbon steel using input materials E 308L-16, E 3016L-16 and E 312-16. The tests were carried out in the laboratories of the Center for Productive Development of Mechanical Metalworking of the Municipal Government of Tungurahua. After having performed the required tests, the procedure is analyzed with the respective analysis and interpretation of the results, and the best mechanical properties found in the union of the stainless steel AISI 420 stainless steel and AISI 1018 low carbon steel with the material of E312-16 contribution obtaining a maximum effort of 613,61 MPa, in addition to an elongation percentage of 16.79 percent likewise the impact energy of 61.27 J and a maximum hardness of 269.38 VHI.