{"id":9869,"date":"2021-08-12T01:42:59","date_gmt":"2021-08-12T01:42:59","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=9869"},"modified":"2021-08-12T01:42:59","modified_gmt":"2021-08-12T01:42:59","slug":"ceramic-foam-filter-system","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/ceramic-foam-filter-system\/","title":{"rendered":"Syst\u00e8me de filtration \u00e0 mousse c\u00e9ramique"},"content":{"rendered":"<p>Le syst\u00e8me de filtration \u00e0 mousse c\u00e9ramique \u00e9limine efficacement la plupart des inclusions pr\u00e9sentes dans la masse fondue, ce qui permet de r\u00e9duire les \u00e9carts au niveau de la r\u00e9sistance \u00e0 la traction, de la limite d'\u00e9lasticit\u00e9 et de l'allongement de la pi\u00e8ce, et d'\u00e9viter la diminution des propri\u00e9t\u00e9s m\u00e9caniques due \u00e0 ces inclusions.<\/p>\n<p>Le m\u00e9canisme de purification du syst\u00e8me de filtration \u00e0 mousse c\u00e9ramique comprend, en gros, les aspects suivants : interception et blocage. En g\u00e9n\u00e9ral, les inclusions de grand volume sont facilement intercept\u00e9es et bloqu\u00e9es par le filtre. Au fur et \u00e0 mesure du passage d\u2019une certaine quantit\u00e9 de m\u00e9tal en fusion, un g\u00e2teau de filtration se forme \u00e0 la surface de l\u2019entr\u00e9e du filtre, apr\u00e8s quoi le d\u00e9bit du m\u00e9tal en fusion \u00e0 travers le filtre est consid\u00e9rablement r\u00e9duit. D'une part, en raison de la diminution du diam\u00e8tre int\u00e9rieur de l'entr\u00e9e, la probabilit\u00e9 d'interception des inclusions de plus petite taille augmente, tout comme l'efficacit\u00e9 d'\u00e9limination de ces derni\u00e8res. D\u2019autre part, en raison de la r\u00e9duction de la section transversale du canal d\u2019\u00e9coulement du m\u00e9tal en fusion, le r\u00e9approvisionnement en m\u00e9tal en fusion est bloqu\u00e9, ce qui peut entra\u00eener des d\u00e9fauts de coul\u00e9e tels qu\u2019un retard d\u2019alimentation et un retrait.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-9589\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2021\/07\/Foam-Ceramic-Filtering.jpg\" alt=\"Filtration par mousse c\u00e9ramique\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/07\/Foam-Ceramic-Filtering.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/07\/Foam-Ceramic-Filtering-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>Le m\u00e9tal en fusion et les inclusions sont g\u00e9n\u00e9ralement non mouillants. Plus la taille des particules des inclusions est petite, plus la mouillabilit\u00e9 est faible. Par cons\u00e9quent, les inclusions \u00e0 petites particules, inf\u00e9rieures \u00e0 50 \u00b5m, doivent \u00eatre \u00e9limin\u00e9es par le m\u00e9canisme d'adsorption. Lorsque les inclusions traversent la paroi du filtre, comme elles sont en contact avec la surface du filtre avec laquelle elles pr\u00e9sentent une meilleure mouillabilit\u00e9 mutuelle, elles sont facilement s\u00e9par\u00e9es du m\u00e9tal en fusion et absorb\u00e9es par la paroi du filtre. Si les pores du <a href=\"http:\/\/www.alalloycasting.com\/fr\/molten-metal-filter\/\">filtre pour m\u00e9tal en fusion<\/a> Si les particules sont petites, que le canal du filtre est long et que le d\u00e9bit est suffisamment lent, les inclusions pr\u00e9sentes dans le m\u00e9tal en fusion sont plus susceptibles d'entrer en contact avec la paroi interne du filtre, ce qui augmente l'efficacit\u00e9 de leur capturation par le filtre. Cependant, les inclusions sous forme de petites particules inf\u00e9rieures \u00e0 10 \u00b5m sont difficiles \u00e0 \u00e9liminer par adsorption. Le m\u00e9tal en fusion traverse le filtre de telle sorte que son \u00e9coulement, initialement turbulent, tend \u00e0 devenir laminaire. Cela permet au m\u00e9tal en fusion de s'\u00e9couler en douceur \u00e0 travers le filtre, \u00e9vitant ainsi son oxydation secondaire.<\/p>","protected":false},"excerpt":{"rendered":"<p>The ceramic foam filter system effectively removes most of the inclusions in the melt, so that the deviation of the tensile strength, yield strength, and&hellip;<\/p>","protected":false},"author":1,"featured_media":9870,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[21,89,1452],"class_list":["post-9869","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ceramic-foam-filter","tag-ceramic-foam-filter","tag-molten-aluminum-filter","tag-molten-metal-filtration"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Ceramic Foam Filter System for Molten Metal 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