{"id":12300,"date":"2022-01-17T07:59:25","date_gmt":"2022-01-17T07:59:25","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=12300"},"modified":"2022-01-17T07:59:25","modified_gmt":"2022-01-17T07:59:25","slug":"aluminum-rotary-degasser","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/aluminum-rotary-degasser\/","title":{"rendered":"D\u00e9gazeur rotatif en aluminium"},"content":{"rendered":"<p>Le d\u00e9gazeur rotatif pour aluminium sert principalement \u00e0 \u00e9liminer les gaz et autres impuret\u00e9s de l'aluminium fondu avant le processus de coul\u00e9e.<\/p>\n<p>Dans une application typique d'un d\u00e9gazeur rotatif pour l'aluminium fondu, l'hydrog\u00e8ne dissous est le gaz cible qui est \u00e9limin\u00e9 de la masse fondue avant l'\u00e9tape suivante du processus, telle que la coul\u00e9e. Par exemple, si de l'hydrog\u00e8ne reste pr\u00e9sent dans l'aluminium lors de la coul\u00e9e, l'hydrog\u00e8ne qui s'\u00e9chappe de la solution peut entra\u00eener un ou plusieurs probl\u00e8mes de coul\u00e9e, tels que le gauchissement, l'\u00e9caillage, la formation de cloques, voire des fissures. L'hydrog\u00e8ne dissous doit g\u00e9n\u00e9ralement \u00eatre \u00e9limin\u00e9 avant l'\u00e9tape suivante du processus.<\/p>\n<p>Les teneurs en hydrog\u00e8ne dissous peuvent varier consid\u00e9rablement selon les applications, mais elles vont g\u00e9n\u00e9ralement de 0,20 ml\/100 g d'Al pour les billettes extrud\u00e9es \u00e0 usage g\u00e9n\u00e9ral \u00e0 0,10 ml\/100 g d'Al pour les brames lamin\u00e9es destin\u00e9es \u00e0 des applications a\u00e9rospatiales.<\/p>\n<p>L'hydrog\u00e8ne est g\u00e9n\u00e9ralement \u00e9limin\u00e9 de l'aluminium fondu en injectant un gaz inerte dans le m\u00e9tal. Parmi les gaz inertes pouvant \u00eatre utilis\u00e9s, on peut citer notamment l'argon ou l'azote.<\/p>\n<p>Outre l'\u00e9limination de l'hydrog\u00e8ne par l'utilisation de gaz inertes, il est souvent souhaitable d'\u00e9liminer d'autres impuret\u00e9s au cours du processus de raffinage, et cette \u00e9limination peut \u00e9galement avoir lieu pendant le processus de d\u00e9gazage.<\/p>\n<p>Par exemple, l'ajout de faibles quantit\u00e9s de chlore au gaz inerte permet d'\u00e9liminer diverses inclusions et impuret\u00e9s de m\u00e9taux alcalins de mani\u00e8re relativement efficace.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-12301\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2022\/01\/Aluminum-Rotary-Degasser.jpg\" alt=\"D\u00e9gazeur rotatif en aluminium\" width=\"600\" height=\"500\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2022\/01\/Aluminum-Rotary-Degasser.jpg 600w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2022\/01\/Aluminum-Rotary-Degasser-300x250.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<p>Les inclusions pr\u00e9sentes dans l'aluminium fondu peuvent provenir de diff\u00e9rentes sources au sein des fours de fusion pendant les op\u00e9rations de fusion. Si ces inclusions ne sont pas \u00e9limin\u00e9es de mani\u00e8re ad\u00e9quate, cela peut entra\u00eener des d\u00e9chirures et des d\u00e9fauts de surface sur les t\u00f4les d'aluminium lamin\u00e9es, ainsi que des piq\u00fbres et une usure accrue des matrices lors de l'extrusion.<\/p>\n<p>Dans certaines applications, l'objectif est d'\u00e9liminer environ 50% des inclusions non mouill\u00e9es pr\u00e9sentes dans le <a href=\"http:\/\/www.alalloycasting.com\/fr\/degassing-system-for-molten-aluminium\/\">syst\u00e8me de d\u00e9gazage<\/a>. On utilise souvent ensuite un filtre en mousse c\u00e9ramique pour filtrer l'aluminium fondu en aval du syst\u00e8me de d\u00e9gazage, afin de r\u00e9duire encore davantage les inclusions dans le m\u00e9tal fondu.<\/p>","protected":false},"excerpt":{"rendered":"<p>Aluminum Rotary Degasser is mainly used to remove gas and other impurities from molten aluminum before\u00a0the casting process. In a typical application of a rotary&hellip;<\/p>","protected":false},"author":1,"featured_media":12301,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18],"tags":[],"class_list":["post-12300","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-degassing-unit"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Aluminum Rotary Degasser -sales@alalloycasting.com<\/title>\n<meta name=\"description\" content=\"Aluminum Rotary Degasser is mainly used to remove gas and other impurities from molten aluminum before\u00a0the casting process.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.alalloycasting.com\/fr\/aluminum-rotary-degasser\/\" \/>\n<meta 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