{"id":6706,"date":"2020-11-26T07:22:48","date_gmt":"2020-11-26T07:22:48","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=6706"},"modified":"2020-11-27T01:03:56","modified_gmt":"2020-11-27T01:03:56","slug":"filter-purification-method","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/filter-purification-method\/","title":{"rendered":"M\u00e9thode de purification par filtration"},"content":{"rendered":"<p>Les inclusions et les gaz pr\u00e9sents dans le m\u00e9tal ont un impact significatif sur la r\u00e9sistance m\u00e9canique, la r\u00e9sistance \u00e0 la fatigue, la r\u00e9sistance \u00e0 la corrosion et la r\u00e9sistance \u00e0 la fissuration par corrosion sous contrainte du mat\u00e9riau. Ma\u00eetriser efficacement les inclusions oxyd\u00e9es dans la masse fondue afin d\u2019am\u00e9liorer la qualit\u00e9 des barres moul\u00e9es et des t\u00f4les lamin\u00e9es est devenu un objectif commun poursuivi par les industries m\u00e9tallurgiques, de la fonderie et des mat\u00e9riaux de tous les pays. Actuellement, le <a href=\"http:\/\/www.alalloycasting.com\/fr\/ceramic-foam-filter-pal\/\">filtre en mousse c\u00e9ramique<\/a> Cette m\u00e9thode de purification est largement utilis\u00e9e pour \u00e9liminer les inclusions pr\u00e9sentes dans les bains de fusion d'alliages d'aluminium.<\/p>\n<p><strong>Formation d'inclusions dans un alliage d'aluminium<\/strong><\/p>\n<p>Une partie des inclusions pr\u00e9sentes dans les alliages d'aluminium provient directement de la charge, et la plupart d'entre elles se forment au cours des processus de fusion et de coul\u00e9e ; il s'agit principalement d'inclusions d'oxyde. Toutes les inclusions pr\u00e9sentes avant la coul\u00e9e sont appel\u00e9es \u00ab inclusions d\u2019oxydation primaires \u00bb ; elles peuvent \u00eatre class\u00e9es en deux cat\u00e9gories en fonction de leur taille : d\u2019une part, les grandes inclusions, r\u00e9parties de mani\u00e8re in\u00e9gale dans la macrostructure, qui rendent la structure de l\u2019alliage discontinue et r\u00e9duisent la compacit\u00e9 de la pi\u00e8ce moul\u00e9e. Elles constituent une source de corrosion et de fissures, r\u00e9duisant ainsi consid\u00e9rablement la r\u00e9sistance et la plasticit\u00e9 de l\u2019alliage ; l\u2019autre type est constitu\u00e9 de petites<\/p>\n<p>Les inclusions dispers\u00e9es sont des inclusions qui ne peuvent pas \u00eatre enti\u00e8rement \u00e9limin\u00e9es apr\u00e8s l'affinage ; elles augmentent la viscosit\u00e9 du m\u00e9tal en fusion et r\u00e9duisent la capacit\u00e9 d'\u00e9coulement de l'aluminium fondu lors de la solidification. Les inclusions d'oxydation secondaires se forment principalement pendant le processus de coul\u00e9e. Lors de la coul\u00e9e, l\u2019aluminium fondu entre en contact avec l\u2019air, et l\u2019oxyg\u00e8ne r\u00e9agit avec l\u2019aluminium pour former des inclusions d\u2019oxyde. Au cours du processus de fusion, l\u2019alliage d\u2019aluminium entre en contact avec divers composants pr\u00e9sents dans les gaz du four, ce qui g\u00e9n\u00e8re des compos\u00e9s tels que l\u2019Al\u2082O\u2083. La pr\u00e9sence d\u2019Al\u2082O\u2083 dans l\u2019aluminium fondu augmente la teneur en hydrog\u00e8ne de ce dernier. Par cons\u00e9quent, la teneur en Al\u2082O\u2083 de l\u2019aluminium fondu a une grande influence sur la formation de pores dans la pi\u00e8ce moul\u00e9e en aluminium.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6722\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/11\/Filter-Purification-Method.jpg\" alt=\"M\u00e9thode de purification par filtration\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/11\/Filter-Purification-Method.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/11\/Filter-Purification-Method-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p><strong>M\u00e9thode de purification par filtration<\/strong><\/p>\n<p>La technologie de filtration par c\u00e9ramique expans\u00e9e a fait son apparition dans les ann\u00e9es 1970 et s'est rapidement g\u00e9n\u00e9ralis\u00e9e aux \u00c9tats-Unis, au Canada, au Japon, en France, en Australie et en Suisse. Il s'agit du moyen le plus efficace pour \u00e9liminer les inclusions pr\u00e9sentes dans la masse d'aluminium fondu.<\/p>\n<p>Ces derni\u00e8res ann\u00e9es, de nouvelles technologies de purification de l\u2019aluminium fondu ont fait l\u2019objet de recherches tant en France qu\u2019\u00e0 l\u2019\u00e9tranger, telles que le traitement dynamique sous vide, la purification par d\u00e9gazage continu par ultrasons et les filtres en c\u00e9ramique de corindon, qui ont donn\u00e9 de tr\u00e8s bons r\u00e9sultats. Cependant, ces proc\u00e9d\u00e9s sont relativement complexes et co\u00fbteux, et il est difficile de les g\u00e9n\u00e9raliser dans la production industrielle. Quant \u00e0 la filtration \u00e0 l'aide de tamis m\u00e9talliques et de toiles en fibres, elle ne permet d'\u00e9liminer que les grosses inclusions pr\u00e9sentes dans la masse fondue d'alliage d'aluminium, mais ne parvient pas \u00e0 \u00e9liminer les inclusions inf\u00e9rieures au micron ; de plus, les tamis m\u00e9talliques risquent \u00e9galement de contaminer l'alliage d'aluminium. L\u2019utilisation de plaques filtrantes en c\u00e9ramique alv\u00e9ol\u00e9e permet d\u2019\u00e9liminer les inclusions fines et d\u2019am\u00e9liorer consid\u00e9rablement les propri\u00e9t\u00e9s m\u00e9caniques et l\u2019aspect des pi\u00e8ces moul\u00e9es.<\/p>\n<p><strong>Principe de la m\u00e9thode de purification par filtration<\/strong><\/p>\n<p>La plaque filtrante en mousse c\u00e9ramique pr\u00e9sente une structure en r\u00e9seau multicouche et des trous traversants multidimensionnels, qui communiquent entre eux. Lors de la filtration, l\u2019aluminium fondu, charg\u00e9 d\u2019inclusions, s\u2019\u00e9coule le long des canaux sinueux et des pores, et est directement intercept\u00e9, adsorb\u00e9, d\u00e9pos\u00e9, etc. lorsqu\u2019il entre en contact avec la structure alv\u00e9olaire de la plaque filtrante. Lorsque la masse fondue s'\u00e9coule dans le trou, le canal de la plaque filtrante \u00e9tant courb\u00e9, la masse fondue qui le traverse change de direction d'\u00e9coulement, et les inclusions entrent en collision avec la paroi du trou et y adh\u00e8rent fermement.<\/p>","protected":false},"excerpt":{"rendered":"<p>Inclusions and gases in the metal have a significant impact on the strength, fatigue resistance, corrosion resistance, and stress corrosion cracking performance of the material.&hellip;<\/p>","protected":false},"author":1,"featured_media":6721,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[7179,7192,7193,7202,7200,7201,7181,7198,7199,7197,7196,7195,7188,7190,7182,7184,7185,7183,7189,7191,7187,7186,7180,7177,7194,7178],"class_list":["post-6706","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-filter-purification-for-deepak-dubal","tag-filter-purification-for-dubai-aluminium-dubal-careers","tag-filter-purification-for-dubai-aluminium-co-ltd-dubal","tag-filter-purification-for-dubai-aluminium-company-ltd-dubal","tag-filter-purification-for-dubai-aluminium-company-ltd-uae","tag-filter-purification-for-dubai-aluminium-company-ltd-v-salaam","tag-filter-purification-for-dubai-aluminium-company-ltd-v-salaam-and-others","tag-filter-purification-for-dubai-aluminum-co-ltd-v-salaam","tag-filter-purification-for-dubai-aluminum-co-ltd","tag-filter-purification-for-dubai-aluminum-company-dubal","tag-filter-purification-for-dubai-aluminum-company-limited-dubal","tag-filter-purification-for-dubai-aluminum-company-ltd-dubal","tag-filter-purification-for-dubal-dubai-aluminium-company-limited","tag-filter-purification-for-dubal-dubai-aluminium-co","tag-filter-purification-for-dubal-aluminium-career","tag-filter-purification-for-dubal-aluminium-company-dubai","tag-filter-purification-for-dubal-aluminium-driver-jobs","tag-filter-purification-for-dubal-aluminium-suggestion-scheme","tag-filter-purification-for-dubal-dubai-aluminium","tag-filter-purification-for-dubal-dubai-aluminium-company","tag-filter-purification-for-dubal-dubai-aluminium-company-ltd","tag-filter-purification-for-dubal-dubai-aluminium-company-uae","tag-filter-purification-for-dubal-lab","tag-filter-purification-for-dubal-reviews","tag-filter-purification-for-jobs-in-dubal-dubai-aluminium","tag-filter-purification-for-working-at-dubal"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Filter Purification Method Used in Aluminum Alloy Melt<\/title>\n<meta name=\"description\" content=\"Ceramic foam filter purification method is widely used to remove inclusions in molten aluminum. 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Il s'agit d'une m\u00e9thode \u00e0 la fois plus \u00e9conomique et plus efficace.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.alalloycasting.com\/fr\/filter-purification-method\/","og_locale":"fr_FR","og_type":"article","og_title":"Filter Purification Method Used in Aluminum Alloy Melt","og_description":"Ceramic foam filter purification method is widely used to remove inclusions in molten aluminum. 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