{"id":6574,"date":"2020-11-19T08:54:02","date_gmt":"2020-11-19T08:54:02","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=6574"},"modified":"2020-11-19T08:54:02","modified_gmt":"2020-11-19T08:54:02","slug":"aluminum-alloy-melting","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/aluminum-alloy-melting\/","title":{"rendered":"Fusi\u00f3n de aleaciones de aluminio"},"content":{"rendered":"<p><strong>La relaci\u00f3n entre el aluminio y el hidr\u00f3geno en el proceso de fundici\u00f3n de aleaciones de aluminio<\/strong><\/p>\n<p>La aleaci\u00f3n de aluminio tiende a absorber gas cuando se encuentra en estado l\u00edquido. El gas absorbido procede principalmente de dos fuentes. Por un lado, es el gas contenido en el aluminio en bruto. Por otro lado, es el que se incorpora mediante los distintos m\u00e9todos de fundici\u00f3n. El gas absorbido en el horno, la humedad y la grasa que se adhieren a la carga del horno procedentes del aire h\u00famedo del entorno, el desgasificador sin secar y la humedad absorbida durante la fundici\u00f3n. Las investigaciones experimentales demuestran que el hidr\u00f3geno es el gas m\u00e1s presente en la absorci\u00f3n de la aleaci\u00f3n de aluminio, por lo que el hidr\u00f3geno es el principal objetivo de la desgasificaci\u00f3n.<\/p>\n<p>La cantidad de hidr\u00f3geno disuelto en la aleaci\u00f3n de aluminio aumenta con la temperatura de calentamiento del aluminio fundido. Empieza a absorber hidr\u00f3geno a partir de unos 600 \u00b0C y aumenta gradualmente hasta los 750 \u00b0C. La temperatura debe superar los 750 \u00b0C para evitar la absorci\u00f3n de grandes cantidades de hidr\u00f3geno. El hidr\u00f3geno se disuelve en la mucosidad y forma una \u201cfase l\u00edquida\u201d con el aluminio. Durante la solidificaci\u00f3n, el hidr\u00f3geno se escapa sin disolverse en el aluminio. Sin embargo, dado que la superficie de la pieza fundida se solidifica primero, el hidr\u00f3geno no puede escapar, por lo que permanece en la pieza y forma poros.<\/p>\n<p><strong>Agente desgasificador<\/strong><\/p>\n<p>El objetivo de la <a href=\"http:\/\/www.alalloycasting.com\/es\/aluminium-refining-agent\/\">agente desgasificante<\/a> consiste en eliminar el hidr\u00f3geno absorbido en la soluci\u00f3n de la aleaci\u00f3n de aluminio, evitar la formaci\u00f3n de poros en el interior de la pieza fundida y hacer que el cristal sea m\u00e1s fino. Los agentes desgasificantes se pueden clasificar en dos tipos: agentes desgasificantes s\u00f3lidos y agentes desgasificantes gaseosos. Entre los agentes desgasificantes s\u00f3lidos se encuentran el ZnCl\u2082, el MnCl\u2082 y el AlCl\u2083, entre otros, mientras que entre los agentes desgasificantes gaseosos se encuentran el cloro y el nitr\u00f3geno.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6481\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/11\/Molten-Aluminium-Casting-Flux.jpg\" alt=\"Fundente para fundici\u00f3n de aluminio fundido\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/11\/Molten-Aluminium-Casting-Flux.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/11\/Molten-Aluminium-Casting-Flux-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p><strong>Oxidaci\u00f3n de las aleaciones de aluminio<\/strong><\/p>\n<p>El \u00f3xido de aluminio se forma cuando el aluminio se oxida. Este absorbe gran cantidad de hidr\u00f3geno del aluminio fundido. Al mismo tiempo, el aluminio y su aleaci\u00f3n en estado l\u00edquido se contaminan con \u00f3xido de aluminio, lo que deteriora gravemente sus prestaciones. La al\u00famina no es soluble en el aluminio fundido, pero reduce la fluidez de la aleaci\u00f3n, lo que provoca la aparici\u00f3n de poros, grietas y marcas en las piezas fundidas, reduciendo as\u00ed sus propiedades mec\u00e1nicas y de mecanizado.<\/p>\n<p>Para conseguir las condiciones necesarias para obtener una aleaci\u00f3n de aluminio relativamente pura, lo primero es utilizar una carga seca y libre de impurezas. La humedad y los productos de corrosi\u00f3n presentes en la superficie del metal son la causa principal de la contaminaci\u00f3n de la aleaci\u00f3n debida a la oxidaci\u00f3n. Durante la fundici\u00f3n, la oxidaci\u00f3n de la aleaci\u00f3n de aluminio se produce debido a la interacci\u00f3n con la atm\u00f3sfera del horno. Cuanto mayor es la temperatura del aluminio fundido, m\u00e1s intenso es el grado de oxidaci\u00f3n. Por lo tanto, unas buenas condiciones de fusi\u00f3n son fundamentales para evitar la oxidaci\u00f3n de la aleaci\u00f3n de aluminio, siempre que el aluminio fundido no se sobrecaliente.<\/p>","protected":false},"excerpt":{"rendered":"<p>The relationship between aluminum and hydrogen in Aluminum Alloy Melting Process Aluminum alloy has a tendency to absorb gas when it is in a liquid&hellip;<\/p>","protected":false},"author":1,"featured_media":6580,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-6574","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>Aluminum Alloy Melting | Refining and Degassing Process<\/title>\n<meta name=\"description\" content=\"The degassing agent can 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