{"id":7120,"date":"2020-12-20T08:52:06","date_gmt":"2020-12-20T08:52:06","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=7120"},"modified":"2020-12-20T08:52:06","modified_gmt":"2020-12-20T08:52:06","slug":"aluminum-rotating-degassing","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/aluminum-rotating-degassing\/","title":{"rendered":"D\u00e9gazage par rotation de l'aluminium"},"content":{"rendered":"<p>En raison de sa l\u00e9g\u00e8ret\u00e9, l'aluminium est un m\u00e9tal tr\u00e8s couramment utilis\u00e9. Cependant, lors de la coul\u00e9e de l'aluminium, des impuret\u00e9s appel\u00e9es \u00ab inclusions \u00bb peuvent cr\u00e9er des points de faiblesse dans le produit. Ces inclusions entra\u00eenent des d\u00e9fauts structurels dans les pi\u00e8ces moul\u00e9es en alliage d'aluminium. Alors que la demande en produits en aluminium de haute qualit\u00e9 ne cesse d\u2019augmenter, notamment dans l\u2019industrie a\u00e9rospatiale, les exigences en mati\u00e8re de qualit\u00e9 des produits en alliage d\u2019aluminium s\u2019accroissent \u00e9galement. Afin d\u2019\u00e9liminer les impuret\u00e9s de la masse fondue et d\u2019obtenir ainsi un aluminium plus pur et de meilleure qualit\u00e9, l\u2019une des m\u00e9thodes de purification les plus efficaces est le d\u00e9gazage rotatif de l\u2019aluminium. Il est donc indispensable d\u2019\u00e9liminer au pr\u00e9alable l\u2019hydrog\u00e8ne et les inclusions non m\u00e9talliques du m\u00e9tal en fusion.<\/p>\n<p>L'aluminium en fusion est extr\u00eamement r\u00e9actif ; ainsi, lorsqu'il entre en contact avec de l'air humide ou des outils humides, l'eau se d\u00e9compose et lib\u00e8re de l'hydrog\u00e8ne dans la masse fondue. Les gaz dissous jouent un r\u00f4le important dans la r\u00e9partition et l'ampleur de la porosit\u00e9 et du retrait. Le d\u00e9gazage de l'aluminium est un proc\u00e9d\u00e9 utilis\u00e9 pour \u00e9liminer l'hydrog\u00e8ne et d'autres impuret\u00e9s solides de l'aluminium fondu. Le d\u00e9gazage de l'aluminium permet de pr\u00e9venir et de minimiser l'introduction d'hydrog\u00e8ne dans la masse fondue, ainsi que d'\u00e9liminer l'hydrog\u00e8ne avant la coul\u00e9e.<\/p>\n<p>AdTech a d\u00e9velopp\u00e9 un <a href=\"http:\/\/www.alalloycasting.com\/fr\/online-degassing-device\/\">dispositif de d\u00e9gazage en ligne<\/a> en utilisant divers syst\u00e8mes de d\u00e9gazage des alliages d'aluminium pour \u00e9liminer les gaz et les inclusions. La fonction principale du syst\u00e8me de d\u00e9gazage en continu est d'\u00e9liminer l'hydrog\u00e8ne dissous dans le m\u00e9tal en fusion, tandis que sa fonction secondaire consiste \u00e0 \u00e9liminer les m\u00e9taux alcalins et les inclusions. Le choix de l'\u00e9quipement de d\u00e9gazage en continu d\u00e9pend de la fonction du produit moul\u00e9 final.<\/p>\n<p>Principe du d\u00e9gazage par rotation de l'aluminium : un gaz inerte (azote ou argon) est introduit dans le m\u00e9tal pr\u00e9sent dans le four \u00e0 travers le rotor creux en graphite. La turbine du rotor permet de briser efficacement les petites bulles. Les m\u00e9taux alcalins, les inclusions et l'hydrog\u00e8ne sont directement \u00e9limin\u00e9s du four en un temps de r\u00e9action court. De plus, gr\u00e2ce \u00e0 l'agitation provoqu\u00e9e par le rotor, l'uniformit\u00e9 de la temp\u00e9rature et de la composition chimique du m\u00e9tal dans le four est am\u00e9lior\u00e9e.<\/p>","protected":false},"excerpt":{"rendered":"<p>In view of its light weight, aluminum is a frequently used metal. However, when casting aluminum, impurities called inclusions can create weak points in the&hellip;<\/p>","protected":false},"author":1,"featured_media":7121,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-7120","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>Aluminum Rotating Degassing with Oline Degassing Unit<\/title>\n<meta name=\"description\" content=\"In order to remove impurities from the melt to provide cleaner aluminum, one of the most effective methods is aluminum rotating degassing.\" \/>\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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