{"id":4018,"date":"2020-08-22T14:36:25","date_gmt":"2020-08-22T14:36:25","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=4018"},"modified":"2020-08-22T14:36:25","modified_gmt":"2020-08-22T14:36:25","slug":"aluminum-melt-refining","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/aluminum-melt-refining\/","title":{"rendered":"Affinage de l'aluminium fondu"},"content":{"rendered":"<p>L'affinage de l'aluminium en fusion consiste \u00e0 \u00e9liminer les gaz et les inclusions pr\u00e9sents dans la masse fondue et \u00e0 uniformiser la composition de l'alliage. L'affinage est une \u00e9tape tr\u00e8s importante du processus de fusion de l'aluminium. Le <a href=\"http:\/\/www.alalloycasting.com\/fr\/refining-flux\/\">flux de raffinage <\/a>Il convient de choisir correctement ce composant et d'en contr\u00f4ler le dosage afin d'am\u00e9liorer la qualit\u00e9 de l'alliage de 0,5% \u00e0 0,7%. Il faut ma\u00eetriser la temp\u00e9rature d'affinage, qui est g\u00e9n\u00e9ralement maintenue entre 700 et 720 \u2103.<\/p>\n<p>Au cours du processus d'affinage de l'aluminium en fusion, environ les deux tiers du flux d'affinage sont introduits par lots \u00e0 la surface du bain de fusion \u00e0 l'aide d'un couvercle en forme de cloche, puis le tout est tourn\u00e9 lentement et uniform\u00e9ment dans le sens des aiguilles d'une montre. La vitesse doit \u00eatre lente et le mouvement r\u00e9gulier afin d'\u00e9viter tout d\u00e9placement important du m\u00e9tal en fusion et d'emp\u00eacher ainsi l'augmentation de la teneur en hydrog\u00e8ne.<\/p>\n<p>L'affinage des alliages d'aluminium est un processus essentiel dans la production de pi\u00e8ces moul\u00e9es. De nombreuses ann\u00e9es d'exp\u00e9rience dans ce domaine ont d\u00e9montr\u00e9 que, si le processus de fusion n'est pas rigoureusement contr\u00f4l\u00e9, les pi\u00e8ces moul\u00e9es sont sujettes \u00e0 l'apparition de piq\u00fbres, de scories d'oxyde, d'inclusions, de cavit\u00e9s de retrait et d'autres d\u00e9fauts qui affectent directement leur qualit\u00e9.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-4019\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/08\/Aluminum-Melt-Refining-1.jpg\" alt=\"Affinage de l&#039;aluminium fondu\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/08\/Aluminum-Melt-Refining-1.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/08\/Aluminum-Melt-Refining-1-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>Le four de pr\u00e9chauffage est rempli de lingots d'alliage pr\u00e9form\u00e9s et de mat\u00e9riaux de chauffage de haute qualit\u00e9, puis les \u00e9l\u00e9ments d'alliage sont ajout\u00e9s en dernier lieu. Le flux de recouvrement, le flux d'affinage et le modificateur au Sr sont utilis\u00e9s conform\u00e9ment au cahier des charges du proc\u00e9d\u00e9 \u00e9tabli.<\/p>\n<p>Il convient de contr\u00f4ler rigoureusement la temp\u00e9rature de fusion de l'alliage d'aluminium. Ce n'est qu'\u00e0 la bonne temp\u00e9rature qu'il est possible d'obtenir un alliage liquide de haute qualit\u00e9 et d'\u00e9viter toute surchauffe. Si la temp\u00e9rature est trop \u00e9lev\u00e9e, les pertes par oxydation et combustion des diff\u00e9rents \u00e9l\u00e9ments pr\u00e9sents dans l'alliage augmenteront, et la composition chimique de l'alliage sera alt\u00e9r\u00e9e. Si la temp\u00e9rature est trop basse, la composition chimique de l'alliage n'est pas homog\u00e8ne, les inclusions d'oxyde et les gaz pr\u00e9sents dans l'alliage ont du mal \u00e0 s'\u00e9chapper, et les performances de l'alliage s'en trouvent r\u00e9duites, ce qui affectera les performances de coul\u00e9e.<\/p>\n<p>Un contr\u00f4le rigoureux de la dur\u00e9e de fusion et une mise en \u0153uvre rapide peuvent r\u00e9duire l'absorption d'impuret\u00e9s et les inclusions d'oxydation, augmenter la perte par combustion des \u00e9l\u00e9ments d'alliage et alt\u00e9rer la composition chimique de l'alliage.<\/p>","protected":false},"excerpt":{"rendered":"<p>Aluminum melt refining is to remove gas and inclusion in melt and make alloy composition uniform. Refining is a very important process in aluminum smelting&hellip;<\/p>","protected":false},"author":1,"featured_media":4020,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[4498],"class_list":["post-4018","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-aluminum-melt-refining"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Aluminum Melt Refining in Aluminum Alloy Smelting Process<\/title>\n<meta name=\"description\" content=\"Aluminum melt refining in aluminum alloy smelting process is to remove gas and inclusion in melt and make alloy composition uniform.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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