{"id":5486,"date":"2020-10-12T06:45:08","date_gmt":"2020-10-12T06:45:08","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=5486"},"modified":"2020-10-12T06:45:08","modified_gmt":"2020-10-12T06:45:08","slug":"refining-aluminum-with-argon","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/refining-aluminum-with-argon\/","title":{"rendered":"Refinado de aluminio con arg\u00f3n"},"content":{"rendered":"

Los defectos de poros finos en las piezas fundidas de aleaci\u00f3n de aluminio son la causa m\u00e1s importante de los desechos de fundici\u00f3n. La presencia de poros finos no solo reduce la superficie \u00fatil de la pieza fundida, sino que tambi\u00e9n constituye un punto de origen de grietas y acelera el proceso de propagaci\u00f3n de las mismas, lo que, en \u00faltima instancia, provoca una disminuci\u00f3n de las propiedades mec\u00e1nicas del material. Los poros se deben principalmente al contenido de escoria y de hidr\u00f3geno en la masa fundida. El hidr\u00f3geno representa aproximadamente el 85% del gas total presente en el aluminio fundido. Dado que la solubilidad del hidr\u00f3geno en el aluminio s\u00f3lido es aproximadamente 1\/20 de la que tiene en estado l\u00edquido, el hidr\u00f3geno disuelto en \u00e9l se precipitar\u00e1 para formar poros diminutos cuando el aluminio se solidifique. El refinado de la aleaci\u00f3n de aluminio mediante inyecci\u00f3n rotativa de arg\u00f3n permite eliminar el hidr\u00f3geno y la escoria, purificar el aluminio l\u00edquido y lograr el objetivo de eliminar los poros diminutos en las piezas fundidas.<\/p>\n

Refinado de aluminio con arg\u00f3n<\/h2>\n

El principio de funcionamiento de unidad de desgasificaci\u00f3n<\/a> es que, cuando el motor hace girar el rotor (normalmente a una velocidad de entre 380 y 450 rpm), el gas arg\u00f3n (con un caudal de entre 0,5 m\u00b3\/hora y 1,5 m\u00b3\/hora) se fragmenta en burbujas muy peque\u00f1as. La presencia de estas peque\u00f1as burbujas reduce la concentraci\u00f3n de hidr\u00f3geno en el aluminio fundido y la presi\u00f3n parcial en su superficie, lo que reduce la concentraci\u00f3n de hidr\u00f3geno en el aluminio fundido, de modo que el hidr\u00f3geno es expulsado de la superficie del aluminio fundido por el arg\u00f3n y se quema en la superficie del l\u00edquido.<\/p>\n

\"Refinado<\/p>\n

Adem\u00e1s, cuando las peque\u00f1as burbujas de arg\u00f3n se desplazan hacia la superficie l\u00edquida en el fondo del aluminio fundido, al entrar en contacto el hidr\u00f3geno disuelto en el aluminio fundido con la interfaz l\u00edquido-arg\u00f3n-aluminio, el hidr\u00f3geno pasa de un estado disuelto a un estado adsorbido, que se encuentra en la capa de adsorci\u00f3n. Los \u00e1tomos de gas presentes en la fase gaseosa reaccionan para producir mol\u00e9culas de hidr\u00f3geno. A medida que las burbujas crecen, ascienden hasta la superficie del aluminio fundido y se queman. Adem\u00e1s, cuando las peque\u00f1as burbujas de arg\u00f3n se desplazan desde el fondo del aluminio fundido hacia la superficie del l\u00edquido, las part\u00edculas en suspensi\u00f3n en el aluminio fundido se agitan, y las inclusiones chocan, se agrupan y crecen. Cuando las inclusiones alcanzan un determinado tama\u00f1o, pueden chocar con las burbujas flotantes, quedar atrapadas y ser arrastradas hasta la superficie del l\u00edquido, con lo que se consigue el efecto de eliminaci\u00f3n de escorias.<\/p>","protected":false},"excerpt":{"rendered":"

Pinhole defects in aluminum alloy castings are the most prominent cause of casting scrap. The existence of pinholes not only reduces the effective working area…<\/p>","protected":false},"author":1,"featured_media":5487,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-5486","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nRefining Aluminum with Argon | AdTech Degassing Unit<\/title>\n<meta name=\"description\" content=\"Refining aluminum alloy with rotating argon injection can remove hydrogen and slag, purify aluminum liquid, and eliminate pinholes.\" \/>\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\/refining-aluminum-with-argon\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta 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