{"id":2950,"date":"2020-07-20T09:13:44","date_gmt":"2020-07-20T09:13:44","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=2950"},"modified":"2020-10-19T06:06:01","modified_gmt":"2020-10-19T06:06:01","slug":"cast-aluminum-alloys","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/cast-aluminum-alloys\/","title":{"rendered":"Aleaciones de aluminio fundido"},"content":{"rendered":"<p>Las aleaciones de aluminio se clasifican en aleaciones de aluminio deformadas y aleaciones de aluminio fundidas seg\u00fan sus usos. Las aleaciones de aluminio forjadas incluyen puertas y ventanas de aleaci\u00f3n de aluminio de uso cotidiano, as\u00ed como materiales para los mecanismos del transbordador espacial, que pueden someterse o no a un tratamiento t\u00e9rmico en funci\u00f3n de los distintos requisitos de uso; el otro tipo son las aleaciones de aluminio fundido, que incluyen principalmente aleaciones de aluminio y silicio, <a href=\"http:\/\/www.alalloycasting.com\/es\/cast-aluminum-alloys\/\">aleaci\u00f3n de aluminio y cobre<\/a>, as\u00ed como aleaciones de aluminio y magnesio, aleaciones de aluminio y zinc y aleaciones de aluminio y tierras raras, etc.<\/p>\n<p>En el proceso de producci\u00f3n real, las aleaciones de aluminio fundido se clasifican en funci\u00f3n del contenido de diversos elementos qu\u00edmicos. En el proceso de fundici\u00f3n es necesario aumentar o reducir la cantidad de materias primas en funci\u00f3n de la composici\u00f3n qu\u00edmica real.<\/p>\n<p>Utilizando lingotes de aluminio puro como materia prima, el proceso de fundici\u00f3n ajusta la composici\u00f3n qu\u00edmica en funci\u00f3n de las necesidades reales de producci\u00f3n. Permite fundir aleaciones de aluminio l\u00edquidas de diferentes calidades y adaptarse a las necesidades de distintos productos, con una amplia variedad de tipos. Antes de fundir la aleaci\u00f3n de aluminio, la composici\u00f3n debe ajustarse a los requisitos establecidos. La composici\u00f3n debe basarse en los grados de aleaci\u00f3n, y hay que tener en cuenta la combusti\u00f3n de diversos elementos en el proceso de fundici\u00f3n del material nuevo, el material reciclado y la aleaci\u00f3n madre.<\/p>\n<p>El m\u00e9todo de fundici\u00f3n m\u00e1s econ\u00f3mico y habitual en la fundici\u00f3n de aleaciones de aluminio es la fundici\u00f3n en horno de gas, que requiere: una fundici\u00f3n r\u00e1pida, un tiempo reducido y una menor absorci\u00f3n de aire. El orden de alimentaci\u00f3n no solo afecta a la eficiencia de la fusi\u00f3n y al consumo de aleaci\u00f3n, sino que tambi\u00e9n influye directamente en la calidad del aluminio fundido. El principio de alimentaci\u00f3n es el siguiente: primero lo peque\u00f1o, luego lo grande; primero lo que se funde f\u00e1cilmente y luego lo que se funde con dificultad; primero lo que se quema menos, luego lo que se quema f\u00e1cilmente y, por \u00faltimo, lo que se deteriora.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-5762\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/07\/Cast-Aluminum-Alloys.jpg\" alt=\"Aleaciones de aluminio fundido\" width=\"400\" height=\"320\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/07\/Cast-Aluminum-Alloys.jpg 400w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/07\/Cast-Aluminum-Alloys-300x240.jpg 300w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/p>\n<p>En primer lugar, se a\u00f1aden peque\u00f1os trozos de material de recalentamiento, lingotes de aleaci\u00f3n de aluminio con un punto de fusi\u00f3n m\u00e1s bajo (como la aleaci\u00f3n Al-Si); a continuaci\u00f3n, se a\u00f1aden lingotes de aluminio de mayor volumen y punto de fusi\u00f3n m\u00e1s alto, as\u00ed como aleaciones intermedias (como Al-Mn), Mg, etc., que se queman f\u00e1cilmente; estos elementos se a\u00f1aden en \u00faltimo lugar. Los trozos peque\u00f1os de material reciclado se colocan primero en el fondo del horno para proteger el cuerpo del mismo y reducir el impacto en la pared del horno cuando se introducen los trozos grandes de carga. Adem\u00e1s, dado que el material reciclado tiene un punto de fusi\u00f3n bajo y se funde f\u00e1cilmente, se puede mejorar la eficiencia de fusi\u00f3n cuando posteriormente se funden las materias primas con puntos de fusi\u00f3n m\u00e1s altos. A\u00f1adir Mg para reducir la temperatura y disminuir as\u00ed las p\u00e9rdidas por combusti\u00f3n.<\/p>\n<p>La fusi\u00f3n es un proceso en el que un s\u00f3lido se calienta hasta convertirse en un l\u00edquido con fluidez. Una vez completada la alimentaci\u00f3n, comienza la fusi\u00f3n. Durante el proceso de fusi\u00f3n, hay que asegurarse de que esta sea r\u00e1pida y uniforme, y de que la temperatura cerca de la llama sea m\u00e1s alta, alcanzando los 1200 \u2103 o m\u00e1s. Para evitar el sobrecalentamiento local y las altas temperaturas, una oxidaci\u00f3n grave de la aleaci\u00f3n de aluminio causar\u00e1 problemas en el posterior refinado del producto. Se debe realizar una agitaci\u00f3n durante el proceso de fusi\u00f3n, y la carga no fundida debe introducirse con un rastrillo en el aluminio fundido para que quede casi completamente sumergida y se remueva de manera uniforme, con el fin de evitar el sobrecalentamiento local. En el caso de los \u00faltimos elementos sumergidos, como el Mg, la llama no puede calentarlos ni fundirlos directamente. Dado que el aluminio l\u00edquido est\u00e1 sumergido en las materias primas, la temperatura se reduce y los elementos como el Mg se mantienen a una temperatura relativamente baja para fundirse, lo que reduce la p\u00e9rdida por combusti\u00f3n y mejora la eficiencia de la misma.<\/p>\n<p>La aleaci\u00f3n de aluminio comienza a fundirse a unos 600 \u2103; la temperatura se eleva hasta los 660 \u2103 para que se funda por completo, y se controla para que la temperatura de fusi\u00f3n no supere los 760 \u2103. Cuando la temperatura de fusi\u00f3n supera los 770 \u2103, la oxidaci\u00f3n de la aleaci\u00f3n de aluminio es grave, aumentan la absorci\u00f3n de hidr\u00f3geno y las inclusiones de escoria durante el proceso de fusi\u00f3n, los granos cristalinos se vuelven gruesos durante el proceso de colada y solidificaci\u00f3n, y se reducen las propiedades mec\u00e1nicas. Para reducir la oxidaci\u00f3n de la aleaci\u00f3n de aluminio durante la fusi\u00f3n, se a\u00f1ade entre 0,41 TP3T y 0,51 TP3T de agente de recubrimiento con el fin de proteger la pel\u00edcula de \u00f3xido de la superficie de la aleaci\u00f3n de aluminio y evitar que resulte da\u00f1ada. El tipo de agente de recubrimiento es similar a la composici\u00f3n qu\u00edmica del agente de limpieza.<\/p>\n<p>La temperatura del proceso de fundici\u00f3n se mantiene entre 720 y 760 \u2103. Una vez fundida una parte del lingote de aluminio, se a\u00f1aden materias primas con puntos de fusi\u00f3n m\u00e1s elevados, como el silicio (Si) y el titanio (Ti). El titanio forma n\u00facleos heterog\u00e9neos en la aleaci\u00f3n para refinar la estructura. Se introduce a presi\u00f3n en el aluminio fundido para que se funda y se reduzca la p\u00e9rdida por combusti\u00f3n. Una vez que el lingote de aluminio se ha fundido pr\u00e1cticamente por completo, se a\u00f1aden elementos de aleaci\u00f3n como el magnesio (Mg) y el cobre (Cu), que se queman con facilidad. No deben a\u00f1adirse demasiado pronto, para reducir las p\u00e9rdidas por combusti\u00f3n, ni demasiado tarde, para no afectar a la difusi\u00f3n y la segregaci\u00f3n. Cierre la puerta del horno para continuar con la fundici\u00f3n.<\/p>","protected":false},"excerpt":{"rendered":"<p>Aluminum alloys are classified into deformed aluminum alloys and cast aluminum alloys according to their uses. Wrought aluminum alloys include daily-used aluminum alloy doors and&hellip;<\/p>","protected":false},"author":1,"featured_media":5762,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[1676],"class_list":["post-2950","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-cast-aluminum-alloys"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Cast Aluminum Alloys,Smelting Process for Aluminum Alloys<\/title>\n<meta name=\"description\" content=\"Cast aluminum alloys mainly including aluminum-silicon alloys, aluminum-copper alloys, and aluminum-magnesium alloys, Aluminum-zinc alloy.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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