{"id":16103,"date":"2018-03-09T09:03:34","date_gmt":"2018-03-09T09:03:34","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/estudio-fenomenologico-y-termodinamico-de-la-sinterizacion-de-aceros-rapidos-pulvimetalurgicos-en-atmosfera-de-nitrogeno\/"},"modified":"2018-03-09T09:03:34","modified_gmt":"2018-03-09T09:03:34","slug":"estudio-fenomenologico-y-termodinamico-de-la-sinterizacion-de-aceros-rapidos-pulvimetalurgicos-en-atmosfera-de-nitrogeno","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/estudio-fenomenologico-y-termodinamico-de-la-sinterizacion-de-aceros-rapidos-pulvimetalurgicos-en-atmosfera-de-nitrogeno\/","title":{"rendered":"Estudio fenomenol\u00f3gico y termodin\u00e1mico de la sinterizaci\u00f3n de aceros r\u00e1pidos pulvimetal\u00fargicos en atm\u00f3sfera de nitr\u00f3geno"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Sixto Gim\u00e9nez Juli\u00e1 <\/strong><\/h2>\n<p>El trabajo realizado en esta tesis doctoral est\u00e1 basado en el estudio de los aceros r\u00e1pidos de herramienta m35mhv, t42 y m42si sinterizados en atm\u00f3sfera con diferentes presiones parciales de nitr\u00f3geno comprendidas entre 0.2 y 8 bar. Se ha estudiado experimentalmente la evoluci\u00f3n de la sinterizabilidad de estas aleaciones con la presi\u00f3n parcial de n en t\u00e9rminos de temperatura de sinterizaci\u00f3n \u00f3ptima (tso) y ventana de sinterizaci\u00f3n (vs). Este estudio se ha completado mediante la caracterizaci\u00f3n metalogr\u00e1fica, qu\u00edmica y cristalogr\u00e1fica de las fases presentes en la microestructura.  los resultados obtenidos muestran que la sinterizabilidad de las aleacciones de acero r\u00e1pido con un contenido de vanadio superior al 2% es funci\u00f3n del contenido de nitr\u00f3geno captado por el acero durante la sinterizaci\u00f3n (aleaciones m35mhv y t42). A su vez, en estos aceros, el contenido de n captado depende de la presi\u00f3n parcial n en la atm\u00f3sfera. En la composici\u00f3n m42si (1.17% v), la presi\u00f3n parcial de n en la atm\u00f3sfera no afecta a la sinterizabilidad de la aleaci\u00f3n.  la sinterizabilidad de las aleaciones empleadas se ha relacionado con su composici\u00f3n qu\u00edmica y su interacci\u00f3n con la atm\u00f3sfera de sinterizaci\u00f3n a trav\u00e9s del c\u00e1lculo termodin\u00e1mico de diagramas de fase multicomponentes que se ha llevado a cabo con el software thermo-calc y la base de datos ssol. El estudio realizado demuestra que la sinterizaci\u00f3n directa de los aceros empleados ocurre mediante un mecanismo supers\u00f3lidus y tiene lugar en la zona del diagrama de fases l+y+m6c+m(c,n). Adem\u00e1s existe una relaci\u00f3n directa entre la sinterizabilidad de las aleaciones estudiadas y la separaci\u00f3n entre las l\u00edneas de coexistencia de fases que limitan dicha zona del diagrama.  la buena correspondencia obtenida entre sinterizabilidad y composici\u00f3n qu\u00edmica a trav\u00e9s de los diagramas de fase multicomponentes se ha utilizado para el dise\u00f1o asistido por ordenador de aleaciones p<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Estudio fenomenol\u00f3gico y termodin\u00e1mico de la sinterizaci\u00f3n de aceros r\u00e1pidos pulvimetal\u00fargicos en atm\u00f3sfera de nitr\u00f3geno<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Estudio fenomenol\u00f3gico y termodin\u00e1mico de la sinterizaci\u00f3n de aceros r\u00e1pidos pulvimetal\u00fargicos en atm\u00f3sfera de nitr\u00f3geno <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Sixto Gim\u00e9nez Juli\u00e1 <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Navarra<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 15\/03\/2002<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>\u00ed\u00f1igo Iturriza Zubillaga<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: javier Gil sevillano <\/li>\n<li> Verdeja gonz\u00e1lez Jos\u00e9 ignacio (vocal)<\/li>\n<li>Jos\u00e9 Manuel Torralba castello (vocal)<\/li>\n<li>justino Fernandez diaz (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Sixto Gim\u00e9nez Juli\u00e1 El trabajo realizado en esta tesis doctoral est\u00e1 basado en el estudio de los 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