Efecto de la temperatura de revenido sobre la dureza y microestructura del acero 30XГC
Fecha
2011-07-20
Autores
Gómez Machado, Rigoberto
Título de la revista
ISSN de la revista
Título del volumen
Editor
Universidad Central "Marta Abreu" de Las Villas
Resumen
Ante la situación financiera por la que atraviesa el país para la compra de acero de alta resistencia que cumpla con las especificaciones deseadas, en la Fabrica Planta Mecánica Fabric Aguilar Noriega, se ha decidido emplear acero 30XГC ya que con un tratamiento térmico se pueden alcanzar las condiciones deseadas de dureza, para arribar a estos resultados fue necesarios realizar una serie de pasos: las muestras fueron tratadas térmicamente a una temperatura de temple de 880 ºC y enfriadas
bruscamente en agua, seguidas de un revenido desde 200 a 600 ºC , para la caracterización metalográfica fueron desbastadas en papel esmeril, se pulieron en una mota con óxido de cromo como abrasivo, luego fueron atacadas químicamente, después de este paso se realizaron ensayos de dureza Vickers. Desde el punto de vista microestructural con el temple se obtuvo una estructura compuesta
fundamentalmente por placas de martensita; la cual fue transformándose, trayendo como resultado una disminución gradual de la dureza del acero.
Acording to the financial and economic position of Cuba at present ,the purchase of steel of high resistance in response with the desired spesifications , at the Planta Mecánica Fabric Aguilar Noriega factory , it has been decided to use 30XГC steel because with a heat tratment it´spossible to ge the desired hardnessconditions, to achieve these results it was necessary to perfom some steps like: samples weretreated thermicly to a temperature of 880 ºCand cooled sudenly in water followed by a tempewring from 200 to 600 ºC, to the metalographic characterizations the samples were roughed down in emery paper then they were polished in a speck with oxide of chromo like abrasibe next the samples were chemically treated and after this step some vickers essays were done. From the microestructural point of viewit bwas abtained a estructurecomposed mainly by martensita´s plates itself, which went transmultingtbringing out as result a gradual decrease of the steel hardness.
Acording to the financial and economic position of Cuba at present ,the purchase of steel of high resistance in response with the desired spesifications , at the Planta Mecánica Fabric Aguilar Noriega factory , it has been decided to use 30XГC steel because with a heat tratment it´spossible to ge the desired hardnessconditions, to achieve these results it was necessary to perfom some steps like: samples weretreated thermicly to a temperature of 880 ºCand cooled sudenly in water followed by a tempewring from 200 to 600 ºC, to the metalographic characterizations the samples were roughed down in emery paper then they were polished in a speck with oxide of chromo like abrasibe next the samples were chemically treated and after this step some vickers essays were done. From the microestructural point of viewit bwas abtained a estructurecomposed mainly by martensita´s plates itself, which went transmultingtbringing out as result a gradual decrease of the steel hardness.
Descripción
Palabras clave
Acero, Fabrica Planta Mecánica Fabric Aguilar Noriega, Tratamiento Térmico