{"id":5043,"date":"2020-09-25T03:36:11","date_gmt":"2020-09-25T03:36:11","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=5043"},"modified":"2020-09-25T03:36:11","modified_gmt":"2020-09-25T03:36:11","slug":"inclusions-filtration","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/inclusions-filtration\/","title":{"rendered":"Filtraci\u00f3n de inclusiones"},"content":{"rendered":"<p>La filtraci\u00f3n de inclusiones es un m\u00e9todo de purificaci\u00f3n de la masa fundida mediante diversos medios r\u00edgidos o fundentes l\u00edquidos, y constituye el \u00faltimo proceso de purificaci\u00f3n cercano a la fase final de la fusi\u00f3n y la colada. Anteriormente, tras el reposo en el horno, el refinado con gas y el refinado con cuatro fundentes, entre otros, aunque se hab\u00edan eliminado las inclusiones y el gas de los aceros 60% a 80%, el metal fundido segu\u00eda conteniendo part\u00edculas m\u00e1s finas de \u201chidr\u00f3geno residual\u201d dispersas y distribuidas. Durante el proceso de refinado, refinado de grano y fluidez, se producen nuevas inclusiones secundarias. Antes de la colada, estas impurezas finas deben recogerse y separarse. En comparaci\u00f3n con otros m\u00e9todos de purificaci\u00f3n, el <a href=\"http:\/\/www.alalloycasting.com\/es\/ceramic-foam-filter-for-metal\/\">filtro de espuma cer\u00e1mica<\/a> Este m\u00e9todo de filtraci\u00f3n se ha convertido en la opci\u00f3n preferida para la eliminaci\u00f3n final de impurezas debido a su bajo consumo energ\u00e9tico, su sencillo funcionamiento, su baja intensidad de mano de obra, su alta eficacia en la eliminaci\u00f3n de impurezas y su menor generaci\u00f3n de contaminaci\u00f3n secundaria.<\/p>\n<p>En sentido estricto, las inclusiones presentes en el aluminio fundido tambi\u00e9n deber\u00edan incluir gas, principalmente hidr\u00f3geno. Existe una relaci\u00f3n parasitaria entre las inclusiones y el gas. Las inclusiones act\u00faan como n\u00facleos de nucleaci\u00f3n del gas y lo adsorben. Cuando el contenido de inclusiones s\u00f3lidas finas es elevado, tras la solidificaci\u00f3n se producen m\u00e1s poros de gas (pin) en el interior de la aleaci\u00f3n, que adsorben tanto las inclusiones como el gas del metal fundido. La porosidad h\u00fameda empeora, y el gas tiende a permanecer en suspensi\u00f3n en el metal fundido, lo que aumenta la dificultad de su eliminaci\u00f3n y puede provocar defectos en el producto, como poros, falta de compactaci\u00f3n y grietas. La presencia de inclusiones es un factor limitante clave para la dificultad de eliminaci\u00f3n del gas.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-5096\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/09\/Inclusions-Filtration-1.jpg\" alt=\"Filtraci\u00f3n de inclusiones\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/09\/Inclusions-Filtration-1.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/09\/Inclusions-Filtration-1-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>En cuanto al rango de control del tama\u00f1o de las inclusiones, cada producto presenta una sensibilidad diferente. Las inclusiones peque\u00f1as no se detectan f\u00e1cilmente debido al movimiento continuo de la interfaz solidificada, por lo que es muy probable que se conviertan en el punto de nucleaci\u00f3n de burbujas; adem\u00e1s, las inclusiones de entre 10 y 20 \u03bcm pueden afectar a la calidad de las piezas fundidas. Con el aumento de la demanda de piezas de fundici\u00f3n m\u00e1s finas y ligeras, los requisitos relativos al tama\u00f1o de las inclusiones se han vuelto cada vez m\u00e1s estrictos. En el caso de los componentes de aleaciones de aluminio para la industria aeroespacial, se considera generalmente que las inclusiones superiores a 3-5 \u03bcm son perjudiciales. El contenido de inclusiones en el aluminio fundido sin ning\u00fan tratamiento es de aproximadamente 0,005\u20130,02 vol. %. Si el tama\u00f1o medio de las inclusiones es de 40 \u03bcm, entonces una concentraci\u00f3n de inclusiones de 1 ppm tambi\u00e9n significa que hay unas 110 part\u00edculas en 1 kg de fundido. El contenido de inclusiones nocivas deber\u00eda controlarse, por lo general, en el orden de varios pm.<\/p>\n<p>La eliminaci\u00f3n de impurezas nocivas, la mejora continua de la pureza del aluminio fundido y la minimizaci\u00f3n de los defectos internos y externos de los productos son cuestiones que siguen cobrando cada vez m\u00e1s importancia en la industria del aluminio. Su importancia no se limita \u00fanicamente al aluminio utilizado en sectores de alta gama como la aviaci\u00f3n, el sector aeroespacial, la electr\u00f3nica, el embalaje y la automoci\u00f3n, sino que tambi\u00e9n suscita gran inter\u00e9s en el \u00e1mbito de la ampliaci\u00f3n del uso del aluminio reciclado. Con el continuo aumento de la proporci\u00f3n de materiales de desecho reciclados, las fuentes y los tipos de inclusiones en el fundido son complejos, y la dificultad para eliminarlas ha aumentado. La filtraci\u00f3n de inclusiones se ha convertido en el problema m\u00e1s dif\u00edcil al que se enfrenta la producci\u00f3n de aluminio de alta gama a partir de aluminio reciclado.<\/p>","protected":false},"excerpt":{"rendered":"<p>Inclusions filtration is a method of purifying the melt with various rigid media or liquid flux media, and it is the last purification process close&hellip;<\/p>","protected":false},"author":1,"featured_media":5095,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-5043","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>Inclusions Filtration in Molten Metal by Ceramic Foam Filter<\/title>\n<meta name=\"description\" content=\"Inclusions filtration is 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