{"id":3990,"date":"2020-08-21T09:32:48","date_gmt":"2020-08-21T09:32:48","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=3990"},"modified":"2020-08-21T09:32:48","modified_gmt":"2020-08-21T09:32:48","slug":"grain-refinement","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/grain-refinement\/","title":{"rendered":"Refinamiento del grano"},"content":{"rendered":"<p>El refinamiento del grano es uno de los procesos m\u00e1s importantes en la fundici\u00f3n y el moldeo de aleaciones de aluminio, y tambi\u00e9n constituye una de las medidas m\u00e1s eficaces para resolver defectos de fundici\u00f3n como la porosidad, los granos gruesos y las grietas. En la fundici\u00f3n de aleaciones, se trata de una cristalizaci\u00f3n fuera de equilibrio. Todos los elementos de impureza (incluidos, por supuesto, los elementos de aleaci\u00f3n) se concentran principalmente en los l\u00edmites de grano. Cuanto m\u00e1s peque\u00f1os son los granos, mayor es la superficie de los l\u00edmites de grano. Cuanto m\u00e1s peque\u00f1os son los granos, mayor es la uniformidad de los elementos de impureza (o elementos de aleaci\u00f3n). <a href=\"http:\/\/www.alalloycasting.com\/es\/flux-refining\/\">Refinado por fundente<\/a>, la desgasificaci\u00f3n y el filtrado en l\u00ednea permiten refinar la granulometr\u00eda.<\/p>\n<p>En el caso de los elementos de impureza, una alta uniformidad puede reducir sus efectos nocivos e incluso convertir en beneficiosos los efectos nocivos de una peque\u00f1a cantidad de dichos elementos. En cuanto a los elementos de aleaci\u00f3n, la alta uniformidad permite potenciar sus propiedades de aleaci\u00f3n y lograr el objetivo de aprovechar al m\u00e1ximo los recursos.<\/p>\n<p>En la producci\u00f3n de aleaciones de aluminio, en el caso de los materiales abrasivos, la distribuci\u00f3n uniforme de los elementos de aleaci\u00f3n y de las impurezas es especialmente importante, ya que el perfil debe someterse a un proceso de corrosi\u00f3n para obtener una superficie arenosa uniforme. Cuanto m\u00e1s finos sean los granos, m\u00e1s uniforme ser\u00e1 la distribuci\u00f3n de los elementos de aleaci\u00f3n (impurezas) y m\u00e1s uniforme resultar\u00e1 la superficie arenosa tras la corrosi\u00f3n.<\/p>\n<p>Una temperatura de fundici\u00f3n adecuada es tambi\u00e9n un factor importante en la producci\u00f3n de varillas de aluminio de alta calidad. Una temperatura demasiado baja puede provocar f\u00e1cilmente defectos de fundici\u00f3n, como inclusiones de escoria y agujas. Si la temperatura es demasiado alta, es probable que se produzcan defectos de fundici\u00f3n como granos gruesos y cristales en forma de pluma.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3991\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/08\/Grain-Refinement.jpg\" alt=\"Refinamiento del grano\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/08\/Grain-Refinement.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/08\/Grain-Refinement-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>Tras el refinado del aluminio fundido, la temperatura de fundici\u00f3n puede aumentarse adecuadamente y, por lo general, puede mantenerse entre 720 y 740 grados. Esto se debe a que, tras el refinado del grano, el aluminio fundido se vuelve pegajoso y se solidifica con facilidad.<\/p>\n<p>En el proceso de fundici\u00f3n, la barra de aluminio presenta una zona de transici\u00f3n bif\u00e1sica l\u00edquido-s\u00f3lido en el frente de cristalizaci\u00f3n. Una temperatura de fundici\u00f3n m\u00e1s elevada da lugar a una zona de transici\u00f3n m\u00e1s estrecha. Esta zona de transici\u00f3n estrecha favorece la salida del gas que se desprende del frente de cristalizaci\u00f3n. Por supuesto, la temperatura no debe ser demasiado alta, ya que una temperatura de fundici\u00f3n demasiado elevada acortar\u00e1 el tiempo efectivo del refinador de grano y har\u00e1 que los granos sean relativamente m\u00e1s grandes.<\/p>","protected":false},"excerpt":{"rendered":"<p>Grain refinement is one of the important processes in aluminum alloy melting and casting, and it is also one of the most effective measures to&hellip;<\/p>","protected":false},"author":1,"featured_media":3991,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[4496],"class_list":["post-3990","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-grain-refinement"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Grain Refinement in aluminum alloy melting and 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