{"id":6742,"date":"2020-11-27T02:33:41","date_gmt":"2020-11-27T02:33:41","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=6742"},"modified":"2020-11-27T02:33:41","modified_gmt":"2020-11-27T02:33:41","slug":"molten-aluminum-degassing","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/molten-aluminum-degassing\/","title":{"rendered":"D\u00e9gazage de l'aluminium fondu"},"content":{"rendered":"

Une fois l'alliage d'aluminium destin\u00e9 au moulage sous pression fondu et affin\u00e9, l'aluminium fondu est pr\u00e9lev\u00e9 apr\u00e8s affinage et d\u00e9gazage ; les moments d'ajout de l'agent d'affinage, le d\u00e9bit d'azote lors du d\u00e9gazage par rotation, la vitesse de la unit\u00e9 de d\u00e9gazage<\/a>\u00a0le rotor en graphite, le temps de d\u00e9gazage, ainsi que le diam\u00e8tre et la hauteur du rotor en graphite. La densit\u00e9 de l'aluminium fondu est mesur\u00e9e et analys\u00e9e tout au long du processus de production.<\/p>\n

Apr\u00e8s le d\u00e9gazage, l'efficacit\u00e9 du d\u00e9gazage varie selon la position du bain d'aluminium liquide dans la ligne de sous-traitance, et c'est \u00e0 proximit\u00e9 du plateau tournant qu'elle est la plus faible ;<\/p>\n

Le d\u00e9bit d'azote a une certaine incidence sur l'emplacement de formation des bulles ; les bulles g\u00e9n\u00e9r\u00e9es par un d\u00e9bit \u00e9lev\u00e9 se propagent plus loin, mais elles provoquent un brassage plus important de l'aluminium en fusion, ce qui peut entra\u00eener des risques pour la s\u00e9curit\u00e9 de la production ;<\/p>\n

La vitesse a une grande influence sur l'efficacit\u00e9 du d\u00e9gazage de l'aluminium en fusion, et une vitesse \u00e9lev\u00e9e permet d'assurer une diffusion plus efficace des gaz et d'\u00e9viter que l'aluminium en fusion ne forme des vagues ;<\/p>\n

Le temps de mise en place du agent de raffinage<\/a> n'a qu'un effet limit\u00e9 sur le d\u00e9gazage par rotation et ne permet pas d'atteindre l'objectif d'affinage de l'int\u00e9rieur de l'aluminium fondu. Les scories de surface pr\u00e9sentes \u00e0 la surface de l'aluminium fondu peuvent \u00eatre trait\u00e9es. Il est recommand\u00e9 d'utiliser un agent d'\u00e9limination des scories pour traiter les scories d'aluminium de surface. Selon le cahier des charges de l'agent d'affinage, la temp\u00e9rature d'utilisation de celui-ci est comprise entre 700 et 750 \u2103, tandis que celle de l'agent de d\u00e9gazage et d'\u00e9limination des scories est \u2265 680 \u2103. Difficile \u00e0 contr\u00f4ler ;<\/p>\n

\"D\u00e9gazage<\/p>\n

La vitesse et le d\u00e9bit d'azote doivent \u00eatre r\u00e9gl\u00e9s conjointement afin de garantir l'effet de d\u00e9gazage et d'\u00e9viter que l'aluminium en fusion ne forme des vagues et ne s'oxyde. Un d\u00e9bit de 15 L\/min \u00e0 400 tr\/min permet de r\u00e9pondre \u00e0 ces exigences ;<\/p>\n

Au cours du processus de d\u00e9gazage, les conditions de rotation de l'aluminium fondu et la pr\u00e9sence ou non de projections d'aluminium fondu ont une incidence sur le d\u00e9gazage et l'oxydation de l'aluminium fondu.<\/p>\n

Apr\u00e8s le d\u00e9gazage, les scories d'aluminium pr\u00e9sentes \u00e0 la surface du bain d'aluminium fondu et la densit\u00e9 de l'\u00e9chantillon permettent d'\u00e9valuer l'efficacit\u00e9 du d\u00e9gazage du bain d'aluminium fondu.<\/p>","protected":false},"excerpt":{"rendered":"

After the die-casting aluminum alloy is melted and refined, the molten aluminum is taken after refining and degassing, the time before and after the refining…<\/p>","protected":false},"author":1,"featured_media":6743,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-6742","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nMolten Aluminum Degassing Effect Influencing Factors<\/title>\n<meta name=\"description\" content=\"The speed and nitrogen flow must be used together to ensure the molten aluminum degassing effect and will not roll and be oxidized.\" \/>\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\/molten-aluminum-degassing\/\" \/>\n<meta property=\"og:locale\" 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