{"id":3945,"date":"2020-08-20T03:00:54","date_gmt":"2020-08-20T03:00:54","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=3945"},"modified":"2020-08-20T03:00:54","modified_gmt":"2020-08-20T03:00:54","slug":"melting-and-pouring-process","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/melting-and-pouring-process\/","title":{"rendered":"Proc\u00e9d\u00e9 de fusion et de coul\u00e9e"},"content":{"rendered":"<p>Les processus de fusion et de coul\u00e9e constituent des \u00e9tapes cruciales dans la production de pi\u00e8ces moul\u00e9es. La plupart des rebuts sont dus \u00e0 un contr\u00f4le inad\u00e9quat de ces processus. Un contr\u00f4le rigoureux de l'ensemble du processus de fusion et de coul\u00e9e joue un r\u00f4le essentiel dans la pr\u00e9vention des d\u00e9fauts de moulage (tels que les pores, les piq\u00fbres, les inclusions, les zones non coul\u00e9es, les sous-coul\u00e9es et les fissures). En raison de son absorption par l'aluminium fondu, celui-ci poss\u00e8de un fort pouvoir oxydant et dissout facilement le fer. Plus la temp\u00e9rature est \u00e9lev\u00e9e, plus la tendance \u00e0 l'absorption d'hydrog\u00e8ne est forte, et plus la dur\u00e9e est longue, plus cette absorption est importante. Des mesures pr\u00e9ventives adapt\u00e9es doivent \u00eatre prises tout au long du processus de fusion et de coul\u00e9e afin de produire des pi\u00e8ces moul\u00e9es conformes aux sp\u00e9cifications.<\/p>\n<h2>Proc\u00e9d\u00e9 de fusion et de coul\u00e9e<\/h2>\n<p>Pour obtenir un aluminium fondu conforme aux normes, il convient tout d'abord de s\u00e9lectionner des mati\u00e8res premi\u00e8res de qualit\u00e9. Une gestion rigoureuse et un traitement ad\u00e9quat de ces mati\u00e8res premi\u00e8res sont \u00e9galement indispensables, faute de quoi la qualit\u00e9 de l'aluminium fondu s'en trouverait gravement compromise.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3947\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/08\/Melting-and-Pouring-Process-1.jpg\" alt=\"Proc\u00e9d\u00e9 de fusion et de coul\u00e9e\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/08\/Melting-and-Pouring-Process-1.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/08\/Melting-and-Pouring-Process-1-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>Cette \u00e9tude, qui porte sur l'influence des lingots d'alliage aluminium-silicium sur la formation de porosit\u00e9s capillaires dans les alliages d'aluminium, a r\u00e9v\u00e9l\u00e9 qu'aucune porosit\u00e9 capillaire n'apparaissait lorsque l'on utilisait de l'aluminium pur pour couler des blocs d'essai en sable. En revanche, lorsqu'on ajoute un lingot d'alliage aluminium-silicium pr\u00e9sentant une macrostructure non conforme, le bloc d'essai pr\u00e9sente des porosit\u00e9s capillaires importantes et des particules plus grossi\u00e8res. Cela s'explique par le fait que, en raison de l'h\u00e9r\u00e9dit\u00e9 du mat\u00e9riau, l'h\u00e9r\u00e9dit\u00e9 de l'alliage aluminium-silicium augmente avec la teneur en silicium. Afin de rem\u00e9dier aux d\u00e9fauts de coul\u00e9e caus\u00e9s par l'h\u00e9r\u00e9dit\u00e9 de la charge, il est n\u00e9cessaire de choisir des cha\u00eenes d'aluminium, <a href=\"http:\/\/www.alalloycasting.com\/fr\/aluminum-alloy-additives\/\">additifs pour alliages d'aluminium<\/a>, ainsi que d'autres minerais pr\u00e9sentant une grande qualit\u00e9 m\u00e9tallurgique.<\/p>\n<p>La charge doit \u00eatre sabl\u00e9e avant utilisation afin d\u2019\u00e9liminer la rouille, la graisse et toute autre salet\u00e9 pr\u00e9sente \u00e0 la surface. La dur\u00e9e de stockage n\u2019\u00e9tant pas longue, les lingots en alliage d\u2019aluminium et les mat\u00e9riaux de recharge dont les surfaces sont relativement propres peuvent \u00eatre trait\u00e9s sans sablage ; en revanche, le filtre en fer, les copeaux, les blocs de sable et les incrustations pr\u00e9sents dans la charge doivent \u00eatre \u00e9limin\u00e9s. L'ensemble de la charge doit \u00eatre pr\u00e9chauff\u00e9 avant d'entrer dans le four et l'humidit\u00e9 adsorb\u00e9e \u00e0 la surface doit \u00eatre \u00e9limin\u00e9e, ce qui permet de r\u00e9duire le temps de fusion \u00e0 moins de 3 heures. \u00c0 condition de garantir la s\u00e9cheresse de la charge, le pr\u00e9chauffage n'est pas n\u00e9cessaire. En r\u00e9sum\u00e9, la charge doit \u00eatre maintenue s\u00e8che, propre et exempte de d\u00e9bris avant son introduction dans le four.<\/p>","protected":false},"excerpt":{"rendered":"<p>Melting and pouring process is important links in casting production. Most scraps are caused by improper control of the smelting and pouring process. Strict control&hellip;<\/p>","protected":false},"author":1,"featured_media":3946,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[4395,4396,4384,4387,4391,4390,4393,4394,4399,4397,4383,4379,4385,4386,4398,4378,4377,4380,4381,4389,4382,4388,4400,4401,4392],"class_list":["post-3945","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-aluminium-strip-melting-and-pouring-process","tag-aluminum-ingot-melting-and-pouring-process","tag-aluminum-metallurgy-melting-and-pouring-process","tag-aluminum-or-aluminium-melting-and-pouring-process","tag-cast-aluminum-melting-and-pouring-process","tag-castable-refractory-melting-and-pouring-process","tag-ceramic-insulation-melting-and-pouring-process","tag-continuous-casting-melting-and-pouring-process","tag-foundry-factory-melting-and-pouring-process","tag-foundry-melting-and-pouring-process","tag-liquid-aluminum-melting-and-pouring-process","tag-materials-and-metallurgy-melting-and-pouring-process","tag-melting-aluminum-melting-and-pouring-process","tag-melting-point-of-aluminum-melting-and-pouring-process","tag-metal-foundry-melting-and-pouring-process","tag-metal-metallurgy-melting-and-pouring-process","tag-metallurgical-engineering-melting-and-pouring-process","tag-metallurgical-industry-melting-and-pouring-process","tag-metallurgical-products-melting-and-pouring-process","tag-metallurgy-company-melting-and-pouring-process","tag-metallurgy-of-aluminium-melting-and-pouring-process","tag-molten-aluminum-melting-and-pouring-process","tag-shell-casting-melting-and-pouring-process","tag-shell-mould-casting-melting-and-pouring-process","tag-what-is-melting-and-pouring-process"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Melting and Pouring Process in Aluminum Casting Production<\/title>\n<meta name=\"description\" content=\"Melting and pouring process is important links in casting production. 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