{"id":17951,"date":"2022-08-22T06:39:54","date_gmt":"2022-08-22T06:39:54","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=17951"},"modified":"2022-08-24T08:22:29","modified_gmt":"2022-08-24T08:22:29","slug":"aluminum-ceramic-foundry-filters","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/aluminum-ceramic-foundry-filters\/","title":{"rendered":"Les filtres en c\u00e9ramique d'aluminium utilis\u00e9s en fonderie sont sensibles aux champs magn\u00e9tiques"},"content":{"rendered":"<p>Aluminium <a href=\"https:\/\/www.alalloycasting.com\/fr\/foundry-filters\/\">filtres en c\u00e9ramique pour fonderie<\/a> sont influenc\u00e9s par les champs magn\u00e9tiques<\/p>\n<p><strong>1 Introduction<\/strong><\/p>\n<p>Les pi\u00e8ces moul\u00e9es en aluminium de qualit\u00e9 sup\u00e9rieure exigent un haut niveau de puret\u00e9 du m\u00e9tal et sont indispensables pour les composants structurels critiques. Le d\u00e9veloppement de m\u00e9thodes de filtration plus efficaces pour l\u2019aluminium liquide est donc essentiel \u00e0 la production d\u2019aluminium tr\u00e8s pur, c\u2019est-\u00e0-dire permettant d\u2019\u00e9liminer les particules d\u2019une taille allant jusqu\u2019\u00e0 10 \u00b5m. Par cons\u00e9quent, l\u2019efficacit\u00e9 d\u2019\u00e9limination des particules de <a href=\"https:\/\/www.alalloycasting.com\/fr\/porous-ceramic-filter-product\/\">filtre en c\u00e9ramique poreuse<\/a>s est devenu un sujet d'int\u00e9r\u00eat.<\/p>\n<p>La g\u00e9n\u00e9ration d'un champ magn\u00e9tique par une bobine d'induction associ\u00e9e \u00e0 de l'aluminium <a href=\"https:\/\/www.alalloycasting.com\/fr\/foundry-filters\/\">filtres en c\u00e9ramique pour fonderie<\/a>\u00a0provoque la fusion du produit \u00e0 travers le m\u00e9dia filtrant, modifiant ainsi l'espacement en pouces. L'application d'un champ magn\u00e9tique alternatif produit par un sol\u00e9no\u00efde pr\u00e9sente clairement plusieurs avantages, \u00e0 savoir : ( 1 ) l'absence de contamination par contact physique avec le dispositif d'agitation, ( ii ) l'absence de sous-refroidissement pendant la filtration, (iii) un meilleur amor\u00e7age de l\u2019\u00e9l\u00e9ment filtrant avec une hauteur de colonne m\u00e9tallique plus faible, et (iv) par cons\u00e9quent, des d\u00e9bits de coul\u00e9e plus \u00e9lev\u00e9s pour les grades de filtres \u00e0 haute densit\u00e9 de pores par pouce (PPI).<\/p>\n<p>Dans la pr\u00e9sente \u00e9tude, nous examinerons l'influence du champ magn\u00e9tique sur la capacit\u00e9 d'amor\u00e7age et de mouillage de l'alliage d'aluminium A356 sur la surface c\u00e9ramique des filtres de fonderie en aluminium-c\u00e9ramique, ainsi que l\u2019impact \u00e9ventuel de ce champ sur les m\u00e9canismes de filtration \u00e0 l\u2019int\u00e9rieur des filtres en c\u00e9ramique, en analysant la distribution des particules de SiC de 1 323 \u00b5m \u00e0 l\u2019aide de mod\u00e8les COMSOL(version 4.2) et une mod\u00e9lisation analytique seront r\u00e9alis\u00e9s pour estimer les forces thermiques et de Lorentz produites, ainsi que pour \u00e9tudier le r\u00e9gime d'\u00e9coulement induit par la masse fondue \u00e0 l'int\u00e9rieur des \u00e9l\u00e9ments filtrants<\/p>\n<figure id=\"attachment_17952\" aria-describedby=\"caption-attachment-17952\" style=\"width: 600px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-17952\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2022\/08\/79.png\" alt=\"filtres en c\u00e9ramique pour fonderie\" width=\"600\" height=\"600\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2022\/08\/79.png 600w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2022\/08\/79-300x300.png 300w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2022\/08\/79-150x150.png 150w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2022\/08\/79-120x120.png 120w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><figcaption id=\"caption-attachment-17952\" class=\"wp-caption-text\">filtres en c\u00e9ramique pour fonderie<\/figcaption><\/figure>\n<p><strong>2 Mat\u00e9riaux et m\u00e9thodes exp\u00e9rimentales<\/strong><\/p>\n<p>Dans le dispositif exp\u00e9rimental consid\u00e9r\u00e9, le champ magn\u00e9tique variable dans le temps induit des courants dans le m\u00e9tal en fusion contenu dans l'appareil. Le produit vectoriel du courant induit et du champ magn\u00e9tique g\u00e9n\u00e8re \u00e0 son tour une pression magn\u00e9tique, et le gradient de densit\u00e9 de flux le long de l'axe de la bobine cr\u00e9e un gradient de pression. Ce gradient de pression entra\u00eene un rot qui induit alors un \u00e9coulement volumique dans le m\u00e9tal. Le rot de la force de Lorentz d\u00e9pend fortement de la conductivit\u00e9 du m\u00e9tal et de la conductivit\u00e9 effective du m\u00e9tal au sein de l'aluminium. <a href=\"https:\/\/www.alalloycasting.com\/fr\/foundry-filters\/\">filtres en c\u00e9ramique pour fonderie<\/a>, qui est r\u00e9duite en raison de la tortuosit\u00e9 et de la porosit\u00e9 du filtre. La vitesse induite du m\u00e9tal liquide \u00e0 l\u2019int\u00e9rieur des filtres de fonderie en c\u00e9ramique d\u2019aluminium peut \u00eatre d\u00e9termin\u00e9e \u00e0 l\u2019aide de la perm\u00e9abilit\u00e9 fluidique du milieu filtrant. En raison de la vitesse induite \u00e9lev\u00e9e \u00e0 l\u2019int\u00e9rieur du filtre, il est n\u00e9cessaire de r\u00e9soudre \u00e0 la fois les termes de perm\u00e9abilit\u00e9 darcienne et non darcienne pour obtenir le champ d\u2019\u00e9coulement r\u00e9sultant \u00e0 l\u2019aide d\u2019un mod\u00e8le par \u00e9l\u00e9ments finis (FEM). Une synth\u00e8se de la th\u00e9orie pertinente\u00b2, des d\u00e9veloppements exp\u00e9rimentaux et de la validation du \u201c mod\u00e8le COMSOL de chauffage par induction \/ champ magn\u00e9tique \u201d a d\u00e9j\u00e0 \u00e9t\u00e9 publi\u00e9e par des membres du pr\u00e9sent groupe de recherche. Les d\u00e9tails des calculs du mod\u00e8le d\u00e9passent le cadre du pr\u00e9sent article et peuvent \u00eatre consult\u00e9s ailleurs.<br \/>\n<iframe loading=\"lazy\" title=\"Lecteur vid\u00e9o YouTube\" src=\"https:\/\/www.youtube.com\/embed\/nxbgHCyjzCM\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>","protected":false},"excerpt":{"rendered":"<p>Aluminum ceramic foundry filters are affected by magnetic fields 1 Introduction Premium quality aluminum castings require a high level of metal cleanliness and are crucial&hellip;<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[9,1727],"class_list":["post-17951","post","type-post","status-publish","format-standard","hentry","category-blog","tag-ceramic-foam-filters","tag-ceramic-foundry-filters"],"yoast_head":"<!-- This site is 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