{"id":5346,"date":"2020-09-30T07:42:02","date_gmt":"2020-09-30T07:42:02","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=5346"},"modified":"2020-09-30T07:42:02","modified_gmt":"2020-09-30T07:42:02","slug":"aluminium-degassing","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/aluminium-degassing\/","title":{"rendered":"Desgasificaci\u00f3n del aluminio"},"content":{"rendered":"

La desgasificaci\u00f3n del aluminio en la fundici\u00f3n a presi\u00f3n de aleaciones de aluminio es muy importante para las propiedades mec\u00e1nicas de la pieza fundida. La absorci\u00f3n de hidr\u00f3geno es la causa principal de la formaci\u00f3n de poros diminutos en las piezas fundidas de aleaciones de aluminio, as\u00ed como de la disminuci\u00f3n de la estanqueidad y de las propiedades mec\u00e1nicas. Por lo tanto, deben adoptarse diversas medidas para controlar estrictamente el contenido de hidr\u00f3geno y otros gases.<\/p>\n

Medidas para controlar el contenido de hidr\u00f3geno<\/strong><\/p>\n

    \n
  1. Antes de introducir la carga en el horno, es necesario eliminar minuciosamente el \u00f3xido y las manchas de aceite de la misma y precalentarla hasta la temperatura especificada.<\/li>\n
  2. El horno debe precalentarse antes de introducir la carga para eliminar la humedad presente en su interior y evitar as\u00ed que la humedad y los hidrocarburos entren en contacto con la carga.<\/li>\n
  3. Antes de entrar en contacto con la aleaci\u00f3n de aluminio fundida, debe precalentarse completamente para eliminar la humedad, y la superficie de las herramientas de hierro debe recubrirse con un agente de recubrimiento.<\/li>\n
  4. Controla la temperatura y el tiempo de fundici\u00f3n, evita que la aleaci\u00f3n de aluminio fundida se sobrecaliente y genere gases, y utiliza el agente refinador<\/a> para el refinado de la aleaci\u00f3n de aluminio fundida. El agente refinador debe estar completamente seco antes de su uso.<\/li>\n
  5. El hidr\u00f3geno contenido en el aluminio fundido se precipita mediante el lavado del aluminio fundido en el recipiente de transferencia con un gas inerte, con el fin de reducir el contenido de hidr\u00f3geno en la aleaci\u00f3n de aluminio fundido.<\/li>\n<\/ol>\n

    \"Desgasificaci\u00f3n<\/p>\n

    El proceso de gas consiste en transportar el aluminio fundido que se encuentra en el paquete de transferencia hasta el unidad de desgasificaci\u00f3n de aluminio<\/a>, y el llenado del aluminio fundido con gas inerte a trav\u00e9s de los orificios de ventilaci\u00f3n del rotor de grafito para precipitar el hidr\u00f3geno, reduciendo as\u00ed el contenido de hidr\u00f3geno en el l\u00edquido fundido. En la operaci\u00f3n normal de fundici\u00f3n, se optimiza y mejora el proceso de desgasificaci\u00f3n por transferencia, y se utilizan diferentes tipos de gases inertes para llenar la masa fundida de aleaci\u00f3n de aluminio en proceso de transferencia, de modo que el hidr\u00f3geno contenido en la masa fundida de aleaci\u00f3n de aluminio pueda precipitarse de forma eficaz, reduciendo as\u00ed el valor de la densidad de la masa fundida de aleaci\u00f3n de aluminio.<\/p>\n

    Elegimos dos tipos diferentes de gases inertes: nitr\u00f3geno y arg\u00f3n, mezclados en distintas proporciones, y posteriormente desgasificados durante el transporte. A partir de los datos experimentales, se observa que, si se utiliza una mayor proporci\u00f3n de arg\u00f3n para la desgasificaci\u00f3n durante el transporte, su densidad se reduce significativamente, pero el coste de producci\u00f3n en lo que respecta al uso de la desgasificaci\u00f3n aumenta en m\u00e1s de un 25%. Tras un an\u00e1lisis exhaustivo y la consideraci\u00f3n de factores como el control de los costes de producci\u00f3n, el equipo de investigaci\u00f3n decidi\u00f3 finalmente utilizar nitr\u00f3geno.<\/p>","protected":false},"excerpt":{"rendered":"

    The aluminium degassing of die-casting aluminum alloy is very important to the mechanical properties of the casting. The hydrogen absorption is the main reason for…<\/p>","protected":false},"author":1,"featured_media":5347,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-5346","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nAluminium Degassing with Nitrogen | Degassing Unit<\/title>\n<meta name=\"description\" content=\"The aluminium degassing with nitrogen of die-casting aluminum alloy is very important to the mechanical properties of the casting.\" \/>\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\/aluminium-degassing\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" 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