{"id":3197,"date":"2020-07-30T10:20:49","date_gmt":"2020-07-30T10:20:49","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=3197"},"modified":"2020-10-19T08:49:30","modified_gmt":"2020-10-19T08:49:30","slug":"aluminum-degassing-treatment","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/aluminum-degassing-treatment\/","title":{"rendered":"Traitement de d\u00e9gazage de l'aluminium"},"content":{"rendered":"

La teneur en hydrog\u00e8ne et les impuret\u00e9s non m\u00e9talliques pr\u00e9sentes dans l'alliage d'aluminium fondu dans l'atelier de fusion et de coul\u00e9e ont une incidence consid\u00e9rable sur la qualit\u00e9 de la pi\u00e8ce moul\u00e9e. G\u00e9n\u00e9ralement, au cours du processus de solidification, la solubilit\u00e9 de l\u2019hydrog\u00e8ne diminuant, il est trop tard pour que l\u2019hydrog\u00e8ne s\u2019\u00e9chappe de la solution, et il est trop tard pour que les impuret\u00e9s non m\u00e9talliques remontent \u00e0 la surface du liquide avant l\u2019entr\u00e9e dans le cristallisoir, ce qui entra\u00eenera l\u2019apparition de plaques et de feuilles lors du processus de laminage ult\u00e9rieur. Les taches blanches et les piq\u00fbres \u00e0 la surface du mat\u00e9riau se multiplient, et ses propri\u00e9t\u00e9s m\u00e9caniques se d\u00e9t\u00e9riorent, ce qui conduit finalement au rejet du produit. C\u2019est pourquoi le traitement de d\u00e9gazage de l\u2019aluminium est essentiel.<\/p>\n

Traitement de d\u00e9gazage de l'aluminium<\/h2>\n

Le principe de fonctionnement du D\u00e9gazage de l'aluminium<\/a> Le traitement consiste \u00e0 utiliser un gaz inerte qui ne r\u00e9agit pas chimiquement avec l'aluminium liquide \u00e0 la temp\u00e9rature de fusion et qui est insoluble dans la masse fondue.<\/p>\n

Il est inject\u00e9 dans le bain d'aluminium en fusion par l'arbre en graphite tournant \u00e0 grande vitesse, ce qui permet de former un grand nombre de petites bulles continues.<\/p>\n

Lorsque les bulles de gaz inerte remontent depuis le fond de la chambre de fusion, sous l'effet de la diff\u00e9rence de pression, l'hydrog\u00e8ne pr\u00e9sent dans la masse fondue continue \u00e0 se diffuser vers ces bulles.<\/p>\n

Une fois que les bulles remontent \u00e0 la surface, l'hydrog\u00e8ne qu'elles contiennent s'\u00e9chappe dans l'atmosph\u00e8re. Au cours de leur remont\u00e9e, lorsque les bulles rencontrent des inclusions non m\u00e9talliques, celles-ci adh\u00e8rent \u00e0 leur surface sous l'effet de la tension superficielle et sont ainsi \u00e9limin\u00e9es \u00e0 mesure que les bulles remontent.<\/p>\n

Parall\u00e8lement, le m\u00e9dia filtrant situ\u00e9 dans la cavit\u00e9 du filtre retient davantage les impuret\u00e9s, de sorte que les s\u00e9diments provenant du r\u00e9servoir sont retenus dans le m\u00e9dia filtrant, ce qui permet de purifier compl\u00e8tement l'aluminium en fusion.<\/p>\n

Les caissons de filtration \u00e0 plaques constituent des \u00e9quipements indispensables aux syst\u00e8mes de purification par filtration utilis\u00e9s dans la coul\u00e9e continue et la coul\u00e9e semi-continue, afin d'assurer une filtration stable.<\/p>","protected":false},"excerpt":{"rendered":"

The hydrogen content and non-metallic impurities of the molten aluminum alloy in the melting and casting workshop will seriously affect the quality of the casting.…<\/p>","protected":false},"author":1,"featured_media":3198,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[138],"tags":[1755,1754],"class_list":["post-3197","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seo","tag-aluminum-degassing-treatment","tag-degassing-process-in-aluminium"],"yoast_head":"\nAluminum Degassing Treatment,Degassing Process In Aluminium<\/title>\n<meta name=\"description\" content=\"Aluminum Degassing Treatment uses the inert gas that does not chemically react with the aluminum liquid at the melting temperature.\" \/>\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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