{"id":8966,"date":"2021-05-27T08:43:57","date_gmt":"2021-05-27T08:43:57","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=8966"},"modified":"2021-05-27T08:43:57","modified_gmt":"2021-05-27T08:43:57","slug":"european-foundries-ceramic-filters","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/european-foundries-ceramic-filters\/","title":{"rendered":"Filtres c\u00e9ramiques des fonderies europ\u00e9ennes"},"content":{"rendered":"

Dans les fonderies europ\u00e9ennes, la plupart des filtres de fonderie en c\u00e9ramique expans\u00e9e sont utilis\u00e9s pour r\u00e9duire les inclusions dans l'alliage d'aluminium liquide. Ces filtres sont l\u00e9gers, tr\u00e8s r\u00e9sistants et dot\u00e9s de larges ouvertures. En g\u00e9n\u00e9ral, la plage d'utilisation des filtres en c\u00e9ramique alv\u00e9ol\u00e9e est comprise entre 10 et 30 PPI. La porosit\u00e9 est mesur\u00e9e par le nombre de pores types par pouce de longueur de filtre. Un filtre \u00e0 mailles larges, comportant un faible nombre de trous par pouce, peut offrir un d\u00e9bit plus \u00e9lev\u00e9 sans pour autant pr\u00e9senter une zone aveugle plus longue.<\/p>\n

L'utilisation optimale des filtres en mousse c\u00e9ramique d'European Foundries permet d'am\u00e9liorer les propri\u00e9t\u00e9s m\u00e9caniques des mat\u00e9riaux de fonderie. La ductilit\u00e9 (allongement) a \u00e9t\u00e9 consid\u00e9rablement am\u00e9lior\u00e9e.<\/p>\n

Le m\u00e9tal filtr\u00e9 avec un filtre en mousse c\u00e9ramique pour fonderie<\/a> peut \u00e9galement produire des pi\u00e8ces moul\u00e9es dont les propri\u00e9t\u00e9s m\u00e9caniques ne subissent que de l\u00e9g\u00e8res variations.<\/p>\n

\"Filtration<\/p>\n

Ces am\u00e9liorations s'expliquent par le fait que les inclusions peuvent provoquer des fractures et des fissures de fatigue dans les pi\u00e8ces moul\u00e9es. La r\u00e9duction du nombre d'inclusions gr\u00e2ce \u00e0 l'utilisation de filtres en mousse c\u00e9ramique permettra de diminuer le nombre de sites susceptibles de donner naissance \u00e0 ces fissures, am\u00e9liorant ainsi les propri\u00e9t\u00e9s m\u00e9caniques du m\u00e9tal moul\u00e9 et limitant la propagation de ces fissures.<\/p>\n

Lors de la fusion et du traitement de l'aluminium fondu, un film se forme g\u00e9n\u00e9ralement \u00e0 la surface du m\u00e9tal en fusion ; ce film est principalement compos\u00e9 d'oxyde d'aluminium et\/ou de composants de son alliage, et il se d\u00e9compose et se disperse au fur et \u00e0 mesure qu'il est m\u00e9lang\u00e9 au m\u00e9tal en fusion, puis est transf\u00e9r\u00e9 dans la poche de coul\u00e9e ou le moule lors de l'agitation.<\/p>\n

De plus, des particules provenant de la peau peuvent se trouver sur le m\u00e9tal solide charg\u00e9 dans le four, ou des particules r\u00e9fractaires peuvent se d\u00e9tacher du rev\u00eatement du four ou de la cuve de transport. Bien qu\u2019il faille faire preuve d\u2019une extr\u00eame prudence lors du frittage et du d\u00e9graissage du m\u00e9tal en fusion, certaines particules solides non m\u00e9talliques finement divis\u00e9es subsistent dans le m\u00e9tal solidifi\u00e9. Bien que ces impuret\u00e9s non m\u00e9talliques soient inoffensives dans certaines pi\u00e8ces moul\u00e9es, elles sont ind\u00e9sirables dans d\u2019autres, notamment lorsqu\u2019elles emp\u00eachent d\u2019obtenir une finition fine ou qu\u2019elles servent de noyaux \u00e0 la formation de vides remplis de gaz.<\/p>","protected":false},"excerpt":{"rendered":"

In European foundries, most foam ceramic foundry filters are used to reduce inclusions in the liquid aluminum alloy. These filters are light in weight, high…<\/p>","protected":false},"author":1,"featured_media":8967,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-8966","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nEuropean Foundries Ceramic Filters for Molten Metal Filtration<\/title>\n<meta name=\"description\" content=\"Most European foundries use foam ceramic foam filters are used to reduce inclusions in molten aluminum, improve the mechanical properties.\" \/>\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\/european-foundries-ceramic-filters\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta 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