{"id":8523,"date":"2021-04-25T08:42:16","date_gmt":"2021-04-25T08:42:16","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=8523"},"modified":"2021-04-25T08:42:16","modified_gmt":"2021-04-25T08:42:16","slug":"degassing-and-grain-refining","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/degassing-and-grain-refining\/","title":{"rendered":"Desgasificaci\u00f3n y refinado del grano"},"content":{"rendered":"<p>Por lo general, el aluminio fundido se somete a un tratamiento antes de la fundici\u00f3n para eliminar el hidr\u00f3geno disuelto en la masa fundida. Este tratamiento se conoce como \u00abdesgasificaci\u00f3n y refinado de grano\u00bb.<\/p>\n<h2>Desgasificaci\u00f3n y refinado del grano<\/h2>\n<p>La desgasificaci\u00f3n es una pr\u00e1ctica habitual para reducir el contenido de hidr\u00f3geno gaseoso en el aluminio fundido y sus aleaciones.<\/p>\n<p>Una de las primeras t\u00e9cnicas de desgasificaci\u00f3n consist\u00eda en tratar la masa fundida (aluminio o aleaci\u00f3n de aluminio fundida) con hexacloroetano. En este proceso, la desgasificaci\u00f3n se produce gracias al cloro gaseoso que se desprende de la descomposici\u00f3n del hexacloroetano al pasar este a trav\u00e9s de la masa fundida.<\/p>\n<p>Con el fin de mejorar la eficacia de la eliminaci\u00f3n del hidr\u00f3geno, as\u00ed como para facilitar el funcionamiento y reducir los riesgos medioambientales; <a href=\"http:\/\/www.alalloycasting.com\/es\/online-degassing\/\">Desgasificaci\u00f3n en l\u00ednea<\/a> ha sido adoptado por el sector.<\/p>\n<p>En el desgasificado en l\u00ednea, se inyecta nitr\u00f3geno o un gas inerte, como el arg\u00f3n, a trav\u00e9s de la masa fundida mediante boquillas giratorias especialmente dise\u00f1adas, lo que permite que el hidr\u00f3geno disuelto salga de la masa fundida en forma de burbujas. Algunos de los equipos disponibles en el mercado para este fin son SNIF, LARS, etc.<\/p>\n<p>En los \u00faltimos avances, se ha a\u00f1adido un peque\u00f1o porcentaje de cloro al gas de purga. Esto ha contribuido a mejorar la eficacia del proceso de desgasificaci\u00f3n y, por ello, ha ido ganando aceptaci\u00f3n. Sin embargo, la adici\u00f3n de cloro conlleva sus propias complicaciones y riesgos, adem\u00e1s del coste.<\/p>\n<p>El refinado de grano del aluminio y sus aleaciones se lleva a cabo con el fin de mejorar la microestructura del producto fundido, de modo que se mejoren la velocidad de fundici\u00f3n, la resistencia al agrietamiento en caliente y las propiedades mec\u00e1nicas, en particular la tenacidad y la ductilidad, etc.<\/p>\n<p>Si describimos brevemente los fundamentos metal\u00fargicos del refinado de grano, el refinador de grano, al introducirse en el aluminio fundido y sus aleaciones, aumenta el n\u00famero de sitios disponibles para la formaci\u00f3n de granos. En tales condiciones, se forman m\u00e1s granos a costa del tama\u00f1o de cada uno de ellos. De este modo, la microestructura del material presentar\u00e1 granos m\u00e1s peque\u00f1os y finos y, por lo tanto, mejores propiedades mec\u00e1nicas.<\/p>","protected":false},"excerpt":{"rendered":"<p>Molten Aluminum is generally processed before casting for the removal of Hydrogen dissolved in the melt. This treatment is known as Degassing and Grain Refining.&hellip;<\/p>","protected":false},"author":1,"featured_media":8543,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-8523","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Degassing and Grain Refining Molten Aluminum Alloy<\/title>\n<meta name=\"description\" content=\"Degassing and Grain Refining: Molten Aluminum is generally processed before casting for the removal of Hydrogen dissolved in the melt.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.alalloycasting.com\/es\/degassing-and-grain-refining\/\" 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