{"id":3622,"date":"2020-08-12T10:06:51","date_gmt":"2020-08-12T10:06:51","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=3622"},"modified":"2020-08-19T06:35:20","modified_gmt":"2020-08-19T06:35:20","slug":"aluminum-melt-protection","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/aluminum-melt-protection\/","title":{"rendered":"Protecci\u00f3n contra la fusi\u00f3n del aluminio"},"content":{"rendered":"<p>Los m\u00e9todos de protecci\u00f3n del aluminio fundido incluyen dos t\u00e9cnicas: una consiste en cubrir la superficie del fundido con un fundente de recubrimiento. El otro consiste en utilizar una aleaci\u00f3n protectora, es decir, a\u00f1adir elementos oxidables a la aleaci\u00f3n para formar una pel\u00edcula protectora densa de \u00f3xido en la superficie del fundido. El objetivo fundamental de estos dos m\u00e9todos es crear una superficie inerte, de modo que el gas y el fundido no interact\u00faen o se reduzca considerablemente la actividad de la reacci\u00f3n qu\u00edmica, con el fin de lograr la protecci\u00f3n del fundido de aluminio.<\/p>\n<p>El primer m\u00e9todo es aplicable a todas las aleaciones de aluminio. No solo previene la oxidaci\u00f3n del metal fundido y la absorci\u00f3n de hidr\u00f3geno, sino que tambi\u00e9n tiene el efecto de eliminar el hidr\u00f3geno. Esto se debe a que el punto de fusi\u00f3n del <a href=\"http:\/\/www.alalloycasting.com\/es\/flux-for-aluminum-melt\/\">flujo de recubrimiento<\/a> suele ser inferior a la del metal fundido, su densidad es menor que la del metal fundido y presenta una buena humectabilidad. Se puede formar una pel\u00edcula de recubrimiento l\u00edquido continua sobre la superficie del metal fundido para separarlo del gas del horno. En general, el ox\u00edgeno y el vapor de agua no pueden reaccionar, o lo hacen en contadas ocasiones, con el metal fundido a trav\u00e9s de la pel\u00edcula de recubrimiento, mientras que los \u00e1tomos de hidr\u00f3geno disueltos en el metal fundido pueden penetrar en la pel\u00edcula y escapar debido a su peque\u00f1o radio.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-3625\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/08\/Aluminum-Melt-Protection-1.jpg\" alt=\"Protecci\u00f3n contra la fusi\u00f3n del aluminio\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/08\/Aluminum-Melt-Protection-1.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/08\/Aluminum-Melt-Protection-1-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>La superficie de la aleaci\u00f3n est\u00e1 compuesta por una pel\u00edcula suelta de \u00f3xido de magnesio con un contenido superior al 1%. Esta pel\u00edcula no puede impedir la reacci\u00f3n entre el metal y el gas. Por lo tanto, adem\u00e1s del primer m\u00e9todo de protecci\u00f3n, tambi\u00e9n se adopta el m\u00e9todo de aleaci\u00f3n protectora.<\/p>\n<p>Se a\u00f1ade berilio (5-50) \u00d7 10\u207b\u2074 a la aleaci\u00f3n para evitar su oxidaci\u00f3n durante el reposo, la fundici\u00f3n y los posteriores tratamientos t\u00e9rmicos y conformado en caliente. En el aluminio fundido, el berilio es un material tensioactivo. Su afinidad por el ox\u00edgeno es mayor que la del aluminio, pero su radio i\u00f3nico es menor que el del aluminio y el magnesio. El berilio se difunde preferentemente hacia la superficie de la masa fundida o rellena las rupturas de la pel\u00edcula de MgO y se oxida. El \u00f3xido de berilio, con \u03b2 &gt; 1, tambi\u00e9n presenta caracter\u00edsticas de alta resistencia, baja presi\u00f3n de descomposici\u00f3n y buena estabilidad t\u00e9rmica. Junto con el MgO, forma una pel\u00edcula densa de \u00f3xido de berilio y magnesio con estructura de espinela, lo que mejora la resistencia a la oxidaci\u00f3n de la aleaci\u00f3n y desempe\u00f1a una funci\u00f3n protectora eficaz. Si no se a\u00f1ade berilio a la aleaci\u00f3n de aluminio con alto contenido en magnesio, resulta dif\u00edcil controlar el contenido de magnesio en la cuasi-aleaci\u00f3n durante el proceso de fusi\u00f3n y colada.<\/p>","protected":false},"excerpt":{"rendered":"<p>Aluminum melt protection methods include two methods: one is to cover the surface of the melt with covering flux. The other is a protective alloy,&hellip;<\/p>","protected":false},"author":1,"featured_media":3624,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[3334,3344,3357,3358,3369,3370,3371,3373,3372,3360,3367,3361,3366,3365,3364,3362,3363,3368,3356,3336,3340,3339,3341,3338,3343,3342,3346,3337,3345,3347,3350,3349,3352,3355,3353,3348,3351,3354,3335,3359,3333],"class_list":["post-3622","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-aluminum-melt-protection-alcoa-fjardaal","tag-aluminum-melt-protection-alcoa-iceland-aluminium","tag-aluminum-melt-protection-alcoa-iceland-aluminum","tag-aluminum-melt-protection-aluminium-company-in-iceland","tag-aluminum-melt-protection-century-aluminium","tag-aluminum-melt-protection-century-aluminium-goose-creek-sc","tag-aluminum-melt-protection-century-aluminium-india","tag-aluminum-melt-protection-century-aluminium-railings","tag-aluminum-melt-protection-century-aluminium-works","tag-aluminum-melt-protection-century-aluminum","tag-aluminum-melt-protection-century-aluminum-hawesville","tag-aluminum-melt-protection-century-aluminum-jobs","tag-aluminum-melt-protection-century-aluminum-news","tag-aluminum-melt-protection-century-aluminum-robards-ky","tag-aluminum-melt-protection-century-aluminum-sebree","tag-aluminum-melt-protection-century-aluminum-sebree-ky","tag-aluminum-melt-protection-century-aluminum-sebree-llc","tag-aluminum-melt-protection-century-aluminum-ware","tag-aluminum-melt-protection-century-iceland-aluminum","tag-aluminum-melt-protection-iceland-aluminium","tag-aluminum-melt-protection-iceland-aluminium-company","tag-aluminum-melt-protection-iceland-aluminium-exports","tag-aluminum-melt-protection-iceland-aluminium-factory","tag-aluminum-melt-protection-iceland-aluminium-foil","tag-aluminum-melt-protection-iceland-aluminium-industry","tag-aluminum-melt-protection-iceland-aluminium-mine","tag-aluminum-melt-protection-iceland-aluminium-production","tag-aluminum-melt-protection-iceland-aluminium-smelter","tag-aluminum-melt-protection-iceland-aluminium-statistics","tag-aluminum-melt-protection-iceland-aluminum","tag-aluminum-melt-protection-iceland-aluminum-company","tag-aluminum-melt-protection-iceland-aluminum-exports","tag-aluminum-melt-protection-iceland-aluminum-industry","tag-aluminum-melt-protection-iceland-aluminum-plants","tag-aluminum-melt-protection-iceland-aluminum-production","tag-aluminum-melt-protection-iceland-aluminum-smelter","tag-aluminum-melt-protection-iceland-aluminum-smelting-plant","tag-aluminum-melt-protection-iceland-aluminum-tariffs","tag-aluminum-melt-protection-nordic-aluminum-conordural","tag-aluminum-melt-protection-rio-tinto-alcan-aluminium-smelter","tag-aluminum-melt-protection-rio-tinto-alcan-iceland-co-ltd-isal"],"yoast_head":"<!-- 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