{"id":5936,"date":"2020-10-24T13:57:53","date_gmt":"2020-10-24T13:57:53","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=5936"},"modified":"2020-10-24T13:57:53","modified_gmt":"2020-10-24T13:57:53","slug":"inclusions-in-strip","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/inclusions-in-strip\/","title":{"rendered":"Inclusions dans la bande"},"content":{"rendered":"<p>La bande lamin\u00e9e \u00e0 chaud contient du laitier, du fondant, divers fragments de mat\u00e9riaux r\u00e9fractaires, des oxydes m\u00e9talliques et d'autres impuret\u00e9s, que l'on appelle des inclusions. Il existe de nombreux types d'inclusions dans la bande lamin\u00e9e \u00e0 chaud ; elles sont pour la plupart de couleur noire ou de la couleur des mat\u00e9riaux r\u00e9fractaires, et pr\u00e9sentent des formes irr\u00e9guli\u00e8res.<\/p>\n<p><strong>Causes des inclusions dans les bandes<\/strong><\/p>\n<p>Les raisons sont les suivantes : les lingots d'aluminium, les alliages-ma\u00eetres et les d\u00e9chets pr\u00e9sents dans les mati\u00e8res premi\u00e8res contiennent des impuret\u00e9s telles que de l'huile, de l'humidit\u00e9, etc., qui sont susceptibles de former des oxydes ainsi que des inclusions r\u00e9fractaires et autres ; quant aux additifs, <a href=\"http:\/\/www.alalloycasting.com\/fr\/tundish-flux\/\">agents de rev\u00eatement<\/a>, agents de scories, agents d'affinage, affineurs, etc. ; des impuret\u00e9s de potassium, de sodium et de chlore se forment facilement ; le combustible utilis\u00e9 pour le graphite et la projection thermique, ainsi que celui utilis\u00e9 pour le gaz d\u2019affinage, la fusion et le chauffage des goulottes, tels que le fioul lourd, le gaz liqu\u00e9fi\u00e9, etc., peut facilement donner lieu \u00e0 la formation d\u2019inclusions de carbone, de nitrure d\u2019aluminium, de chlore, de soufre et autres ; les bavures de four, les syst\u00e8mes d\u2019alimentation en coul\u00e9e, les outils, etc., ne sont pas exempts de d\u00e9fauts ; les fines copeaux provenant des buses de coul\u00e9e, l\u2019\u00e9caillage des buses de coul\u00e9e, les scories, etc., sont susceptibles de devenir des inclusions telles que le calcium, le silicium, l\u2019alumine, etc. ; des op\u00e9rations de proc\u00e9d\u00e9 inappropri\u00e9es, telles qu\u2019un laitier de fusion impur, un m\u00e9lange incorrect, une temp\u00e9rature de fusion \u00e9lev\u00e9e, etc., favorisent \u00e9galement leur formation.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-5960\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/10\/Inclusions-in-Strip.jpg\" alt=\"Inclusions dans la bande\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/10\/Inclusions-in-Strip.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/10\/Inclusions-in-Strip-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p><strong>Mesures pr\u00e9ventives contre les inclusions dans les bandes<\/strong><\/p>\n<p>Les mesures pr\u00e9ventives \u00e0 prendre sont les suivantes : s'assurer que les mati\u00e8res premi\u00e8res et auxiliaires sont propres, et que les lingots d'aluminium, les alliages interm\u00e9diaires et les d\u00e9chets utilis\u00e9s sont exempts d'huile et d'humidit\u00e9 ; choisir des additifs, des \u00e9mulsions de graphite et des agents de combustion de haute qualit\u00e9 ; le four doit \u00eatre nettoy\u00e9 r\u00e9guli\u00e8rement afin de garantir que le four, le syst\u00e8me d\u2019alimentation, les outils, etc. soient secs et propres ; lors de l\u2019utilisation de la projection thermique ou de la projection de graphite, ajuster le rapport et le volume de projection pour assurer une projection uniforme ; renforcer <a href=\"http:\/\/www.alalloycasting.com\/fr\/refining-and-degassing-in-aluminum-alloy\/\">raffinage et d\u00e9gazage<\/a> et la filtration de la masse fondue afin d'am\u00e9liorer la pr\u00e9cision de la filtration. Il convient de r\u00e9duire au minimum le temps de fusion, de diminuer de mani\u00e8re appropri\u00e9e la temp\u00e9rature de fusion et d'\u00e9viter que la couche d'oxyde ne se m\u00e9lange \u00e0 la masse fondue pendant les op\u00e9rations de production ; les copeaux d'aluminium pr\u00e9sents dans la cavit\u00e9 et sur la surface des rouleaux doivent \u00eatre \u00e9limin\u00e9s avant la mise en place de la plaque verticale afin de minimiser la formation de scories ; si la buse de coul\u00e9e est endommag\u00e9e, il faut l'arr\u00eater \u00e0 temps et la remplacer.<\/p>","protected":false},"excerpt":{"rendered":"<p>The cast-rolled strip contains slag, flux, various refractory fragments, metal oxides and other impurities, which are called inclusions. There are many kinds of inclusions in&hellip;<\/p>","protected":false},"author":1,"featured_media":5960,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-5936","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Inclusions in Strip | Refining Degassing and Melt Filtering<\/title>\n<meta name=\"description\" content=\"There are many kinds of inclusions in strip, mostly black or refractory color, with irregular shapes. 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