{"id":8260,"date":"2021-03-31T05:30:37","date_gmt":"2021-03-31T05:30:37","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=8260"},"modified":"2021-03-31T05:30:37","modified_gmt":"2021-03-31T05:30:37","slug":"aluminium-casting-tips","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/aluminium-casting-tips\/","title":{"rendered":"Conseils pour le moulage de l'aluminium"},"content":{"rendered":"

Au cours du processus de coul\u00e9e et de laminage, il est indispensable que l'\u00e9coulement de la masse fondue dans la cavit\u00e9 soit stable et que le champ de flux thermique de fusion \u00e0 la sortie de la buse soit r\u00e9parti uniform\u00e9ment dans le sens de la largeur ; les blocs de d\u00e9rivation doivent donc \u00eatre r\u00e9partis de mani\u00e8re judicieuse. Les buses de coul\u00e9e d\u2019aluminium constituent des composants cl\u00e9s de la coul\u00e9e \u00e0 deux cylindres de bandes minces \u00e0 grande vitesse, et elles influent directement sur la qualit\u00e9 de la t\u00f4le d\u2019aluminium.<\/p>\n

La coul\u00e9e \u00e0 deux cylindres de bandes minces \u00e0 grande vitesse est une technologie de transformation \u00e0 \u00e9coulement court permettant d'obtenir des pi\u00e8ces de forme proche de la forme finale. Ce proc\u00e9d\u00e9 de coul\u00e9e-laminage rel\u00e8ve de la cat\u00e9gorie de la solidification quasi-rapide, et sa vitesse de refroidissement est comprise entre 102 \u00b0C\/s et 104 \u00b0C\/s.<\/p>\n

Cette technologie pr\u00e9sente notamment l'avantage d'affiner les grains cristallins et de limiter la s\u00e9gr\u00e9gation ; elle permet d'am\u00e9liorer la microstructure du produit, d'obtenir d'excellentes performances lors des \u00e9tapes de transformation ult\u00e9rieures et de fabriquer des produits difficiles \u00e0 obtenir dans des conditions de fabrication classiques.<\/p>\n

En raison de ses caract\u00e9ristiques techniques, cette technologie n\u00e9cessite un refroidissement rapide du m\u00e9tal en fusion lors de la coul\u00e9e et du laminage, ainsi qu'un champ d'\u00e9coulement ad\u00e9quat dans la cavit\u00e9 de la buse ; \u00e0 d\u00e9faut, la qualit\u00e9 des produits en bandes minces ainsi que la stabilit\u00e9 des pi\u00e8ces moul\u00e9es et du processus de laminage seraient compromises.<\/p>\n

La structure et les composants de la cavit\u00e9 de la buse sont les \u00e9l\u00e9ments cl\u00e9s qui influencent la r\u00e9partition du champ d'\u00e9coulement et du champ de temp\u00e9rature \u00e0 l'int\u00e9rieur de celle-ci. Il est donc n\u00e9cessaire de mettre au point un nouveau type de buse de moule, dot\u00e9e d'une capacit\u00e9 de refroidissement accrue et permettant une r\u00e9partition plus optimale du champ d'\u00e9coulement dans la cavit\u00e9 de la buse.<\/p>\n

\"Buses<\/p>\n

Les buses de coul\u00e9e d'aluminium sont fabriqu\u00e9es \u00e0 partir de fibres c\u00e9ramiques et d'autres mat\u00e9riaux r\u00e9fractaires. La surface d'ouverture et la surface de travail sont recouvertes d'un rev\u00eatement lisse, ce qui permet de r\u00e9sister \u00e0 la corrosion de l'aluminium liquide et de garantir la puret\u00e9 de la plaque d'aluminium.<\/p>\n

Les embouts de coul\u00e9e pr\u00e9sentent d'excellentes propri\u00e9t\u00e9s anti-mouillage, une faible conductivit\u00e9 thermique, une stabilit\u00e9 \u00e0 haute temp\u00e9rature, une densit\u00e9 homog\u00e8ne, une surface lisse et des tol\u00e9rances serr\u00e9es ; il s'agit de produits de haute qualit\u00e9 destin\u00e9s \u00e0 la coul\u00e9e continue de bandes d'aluminium.<\/p>\n

Le embouts et buses de coul\u00e9e<\/a> sont compos\u00e9s de fibres c\u00e9ramiques et de mat\u00e9riaux c\u00e9ramiques inorganiques, et pr\u00e9sentent les avantages d'une \u00e9lasticit\u00e9 mod\u00e9r\u00e9e, d'une faible d\u00e9formation et d'une longue dur\u00e9e de vie.<\/p>\n

Cela permet d'emp\u00eacher efficacement l'aluminium en fusion de corroder le cavit\u00e9 de la buse<\/a> du moule de coul\u00e9e, ce qui constitue une garantie efficace de la qualit\u00e9 de la t\u00f4le d'aluminium coul\u00e9e et lamin\u00e9e.<\/p>\n

En fonction des besoins des clients, il est possible de fabriquer des embouts d'alimentation et des buses de diff\u00e9rents types et selon divers modes d'alimentation.<\/p>","protected":false},"excerpt":{"rendered":"

During the casting and rolling process, the melt flow in the cavity is required to be stable, and the melting heat flow field at the…<\/p>","protected":false},"author":1,"featured_media":8261,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-8260","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ceramic-fiber-castertip"],"yoast_head":"\nAluminium Casting Tips -sales@alalloycasting.com<\/title>\n<meta name=\"description\" content=\"The aluminium casting tips are made of ceramic fiber and other refractory materials. 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