{"id":1239,"date":"2020-04-17T09:48:50","date_gmt":"2020-04-17T09:48:50","guid":{"rendered":"http:\/\/alalloycasting.com\/?p=1239"},"modified":"2020-08-28T06:24:09","modified_gmt":"2020-08-28T06:24:09","slug":"degassing-in-casting","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/degassing-in-casting\/","title":{"rendered":"Desgaseifica\u00e7\u00e3o na fundi\u00e7\u00e3o"},"content":{"rendered":"<p>O alum\u00ednio \u00e9 um metal frequentemente utilizado por sua resist\u00eancia relativa, dada sua leveza. No entanto, quando o alum\u00ednio \u00e9 fundido, impurezas conhecidas como inclus\u00f5es podem criar pontos fracos no produto. Essas inclus\u00f5es levam a defeitos na estrutura da pe\u00e7a fundida de liga de alum\u00ednio. Com o aumento da demanda por produtos de alum\u00ednio de maior qualidade, especialmente na ind\u00fastria aeroespacial, cresce tamb\u00e9m a necessidade de produtos de liga de alum\u00ednio de alta qualidade. Para remover as impurezas da massa fundida e obter um alum\u00ednio mais puro e de melhor qualidade, um dos m\u00e9todos de limpeza mais eficazes \u00e9 a desgaseifica\u00e7\u00e3o do alum\u00ednio. A desgaseifica\u00e7\u00e3o na fundi\u00e7\u00e3o \u00e9, portanto, essencial para remover o hidrog\u00eanio e as inclus\u00f5es n\u00e3o met\u00e1licas do metal fundido antes do processo.<\/p>\n<h2>Desgaseifica\u00e7\u00e3o na fundi\u00e7\u00e3o<\/h2>\n<p>A desgaseifica\u00e7\u00e3o do alum\u00ednio baseia-se no princ\u00edpio de que o hidrog\u00eanio gasoso dissolvido se deslocar\u00e1 de uma \u00e1rea de alta concentra\u00e7\u00e3o (na massa fundida) para uma \u00e1rea de baixa concentra\u00e7\u00e3o (no g\u00e1s inerte). O hidrog\u00eanio gasoso se dispersa no metal fundido da mesma forma que se fosse liberado em qualquer espa\u00e7o confinado. Ele manter\u00e1 uma concentra\u00e7\u00e3o constante em toda a massa fundida.<\/p>\n<p>O g\u00e1s hidrog\u00eanio pode migrar no metal l\u00edquido quase t\u00e3o rapidamente quanto no ar. Portanto, n\u00e3o \u00e9 necess\u00e1rio colocar cada on\u00e7a de metal em contato com o g\u00e1s inerte. A efici\u00eancia da desgaseifica\u00e7\u00e3o do alum\u00ednio \u00e9 determinada por dois fatores: a taxa de transfer\u00eancia na interface metal\/g\u00e1s e a \u00e1rea superficial total dispon\u00edvel para a transfer\u00eancia.<\/p>\n<p>Os sistemas tradicionais de desgaseifica\u00e7\u00e3o de hidrog\u00eanio faziam borbulhar gases especiais (cloro, freon ou SF\u2086) atrav\u00e9s do metal para acelerar a transfer\u00eancia do hidrog\u00eanio pela interface metal-g\u00e1s, formando grandes bolhas. Havia um limite pr\u00e1tico para a remo\u00e7\u00e3o de hidrog\u00eanio em dias \u00famidos, pois, \u00e0 medida que as grandes bolhas rompiam a superf\u00edcie, era criada uma \u00e1rea superficial maior do metal, que ent\u00e3o absorvia mais hidrog\u00eanio da atmosfera \u00famida.<\/p>\n<figure id=\"attachment_1583\" aria-describedby=\"caption-attachment-1583\" style=\"width: 500px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1583\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/05\/Aluminium-Liquid-Degasser.jpg\" alt=\"Desgaseificador de alum\u00ednio l\u00edquido\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/05\/Aluminium-Liquid-Degasser.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/05\/Aluminium-Liquid-Degasser-300x240.jpg 300w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/05\/Aluminium-Liquid-Degasser-125x100.jpg 125w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><figcaption id=\"caption-attachment-1583\" class=\"wp-caption-text\">Desgaseificador de alum\u00ednio l\u00edquido<\/figcaption><\/figure>\n<h2>Fabricante de unidades de desgaseifica\u00e7\u00e3o<\/h2>\n<p>A AdTech h\u00e1 muito tempo est\u00e1 ciente da necessidade de um tratamento eficaz com g\u00e1s de fluxo para remover hidrog\u00eanio e inclus\u00f5es. Assim, a unidade de desgaseifica\u00e7\u00e3o em linha da AdTech pode atender a essa exig\u00eancia e alcan\u00e7ar a melhor efici\u00eancia de desgaseifica\u00e7\u00e3o poss\u00edvel. A desgaseifica\u00e7\u00e3o rotativa representa um grande avan\u00e7o na desgaseifica\u00e7\u00e3o automatizada, eficiente e econ\u00f4mica. O princ\u00edpio de funcionamento das m\u00e1quinas de desgaseifica\u00e7\u00e3o, que conta com um rotor, permite a gera\u00e7\u00e3o de bolhas muito finas de gases inertes, distribu\u00eddas de maneira uniforme e consistente por todo o banho de metal.<\/p>\n<p><a href=\"https:\/\/www.alalloycasting.com\/pt\/degassing-unit\/\">Unidade de desgaseifica\u00e7\u00e3o<\/a> possui um corpo de forno de vida \u00fatil ultralonga, fabricado com uma nova tecnologia de produ\u00e7\u00e3o de material fundido com alto teor de sil\u00edcio. O rotor de desgaseifica\u00e7\u00e3o, a manga de prote\u00e7\u00e3o do aquecedor e a manga de prote\u00e7\u00e3o do termopar s\u00e3o todos fabricados com tecnologia de cer\u00e2mica de nitreto de sil\u00edcio (Si\u2083N\u2084). O objetivo \u00e9 eliminar o hidrog\u00eanio e outros res\u00edduos contidos no alum\u00ednio fundido e em suas ligas, que afetam sua qualidade e propriedades mec\u00e2nicas.<\/p>","protected":false},"excerpt":{"rendered":"<p>Aluminum is a metal used often for its relative strength given its lightweight. When aluminum is cast, however, impurities known as inclusions can create weak&hellip;<\/p>","protected":false},"author":1,"featured_media":4272,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18,138],"tags":[1248,1256,1249,1237,1240,1244,1243,116,1246,1255,1247,1250,1252,1236,1232,1238,1239,1251,1231,1230,1233,1234,1242,1235,1241,1253,1254],"class_list":["post-1239","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-degassing-unit","category-seo","tag-degassing-in-aluminium-strip","tag-degassing-in-aluminum-billet-casting","tag-degassing-in-aluminum-ingot","tag-degassing-in-aluminum-metallurgy","tag-degassing-in-aluminum-or-aluminium","tag-degassing-in-cast-aluminum","tag-degassing-in-castable-refractory","tag-degassing-in-casting","tag-degassing-in-ceramic-insulation","tag-degassing-in-ceramic-shell-casting","tag-degassing-in-continuous-casting","tag-degassing-in-foundry","tag-degassing-in-foundry-factory","tag-degassing-in-liquid-aluminum","tag-degassing-in-materials-and-metallurgy","tag-degassing-in-melting-aluminum","tag-degassing-in-melting-point-of-aluminum","tag-degassing-in-metal-foundry","tag-degassing-in-metal-metallurgy","tag-degassing-in-metallurgical-engineering","tag-degassing-in-metallurgical-industry","tag-degassing-in-metallurgical-products","tag-degassing-in-metallurgy-company","tag-degassing-in-metallurgy-of-aluminium","tag-degassing-in-molten-aluminum","tag-degassing-in-shell-casting","tag-degassing-in-shell-mould-casting"],"yoast_head":"<!-- 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