{"id":2076,"date":"2020-05-28T09:40:42","date_gmt":"2020-05-28T09:40:42","guid":{"rendered":"http:\/\/alalloycasting.com\/?p=2076"},"modified":"2020-09-14T09:28:29","modified_gmt":"2020-09-14T09:28:29","slug":"6063-aluminum-alloy-melting","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/6063-aluminum-alloy-melting\/","title":{"rendered":"Fusion de l'alliage d'aluminium 6063"},"content":{"rendered":"

L'alliage d'aluminium 6063 est largement utilis\u00e9 dans la fabrication de portes, fen\u00eatres et murs-rideaux en aluminium ; il s'agit d'un alliage d'aluminium tr\u00e8s courant. Afin de garantir que les portes, fen\u00eatres et murs-rideaux pr\u00e9sentent une r\u00e9sistance \u00e9lev\u00e9e \u00e0 la pression du vent, de bonnes performances d'assemblage, une bonne r\u00e9sistance \u00e0 la corrosion et des qualit\u00e9s esth\u00e9tiques, les exigences globales en mati\u00e8re de performances des profil\u00e9s en alliage d'aluminium sont bien sup\u00e9rieures aux normes industrielles applicables aux profil\u00e9s. La fusion de l'alliage d'aluminium constitue l'\u00e9tape la plus importante du moulage de l'alliage d'aluminium 6063, car elle influe sur la qualit\u00e9 du produit. La fusion de l'alliage d'aluminium n\u00e9cessite de contr\u00f4ler les aspects suivants.<\/p>\n

Temp\u00e9rature de fusion de l'alliage d'aluminium 6063<\/h2>\n

La fusion des alliages d'aluminium constitue l'une des \u00e9tapes les plus importantes du processus de fabrication de barres de coul\u00e9e de haute qualit\u00e9. Elle doit faire l'objet d'un contr\u00f4le rigoureux. Si le processus n'est pas correctement ma\u00eetris\u00e9, les barres de coul\u00e9e pr\u00e9senteront des d\u00e9fauts tels que des scories, des pores, un grain grossier, des cristaux en plumes et d'autres d\u00e9fauts de coul\u00e9e.<\/p>\n

Il est pr\u00e9f\u00e9rable de maintenir la temp\u00e9rature de fusion de l'alliage d'aluminium 6063 entre 750 et 760 \u00b0C. Une temp\u00e9rature trop basse favorisera la formation d'inclusions de scories, tandis qu'une temp\u00e9rature trop \u00e9lev\u00e9e augmentera l'absorption d'hydrog\u00e8ne et l'oxydation. Des \u00e9tudes ont montr\u00e9 que la solubilit\u00e9 de l\u2019hydrog\u00e8ne dans l\u2019aluminium fondu augmente fortement au-del\u00e0 de 760 \u00b0C. Il existe de nombreux moyens de limiter l\u2019absorption d\u2019hydrog\u00e8ne, tels que le s\u00e9chage des fours de fusion et des outils de fusion, afin d\u2019\u00e9viter que l\u2019utilisation de fondants ne soit compromise par l\u2019humidit\u00e9. Cependant, la temp\u00e9rature de fusion reste l\u2019un des facteurs les plus d\u00e9terminants. Une temp\u00e9rature de fusion excessive entra\u00eene non seulement un gaspillage d\u2019\u00e9nergie et une augmentation des co\u00fbts, mais constitue \u00e9galement une cause directe de d\u00e9fauts tels que les pores, les grains grossiers et les cristaux en plumes.<\/p>\n

S\u00e9lectionnez \u00ab Excellent Flux \u00bb<\/strong><\/p>\n

Flux<\/a> Il s'agit d'un mat\u00e9riau auxiliaire important utilis\u00e9 dans la fusion des alliages d'aluminium. Les principaux composants des fondants actuellement disponibles sur le march\u00e9 sont les chlorures et les fluorures. Parmi ceux-ci, les chlorures pr\u00e9sentent une forte capacit\u00e9 d'absorption d'eau et sont sensibles \u00e0 l'humidit\u00e9. Par cons\u00e9quent, les mati\u00e8res premi\u00e8res utilis\u00e9es dans la production de fondants doivent \u00eatre s\u00e9ch\u00e9es. Il convient d\u2019\u00e9liminer compl\u00e8tement l\u2019humidit\u00e9, de sceller l\u2019emballage, d\u2019\u00e9viter tout dommage pendant le transport et le stockage, et de pr\u00eater attention \u00e0 la date de fabrication. Si la dur\u00e9e de stockage est trop longue, une absorption d\u2019humidit\u00e9 se produira \u00e9galement. Lors de la fusion de l\u2019alliage d\u2019aluminium 6063, si le flux, tel que l\u2019agent d\u2019affinage ou l\u2019agent de recouvrement, absorbe de l\u2019humidit\u00e9, cela entra\u00eenera une absorption d\u2019hydrog\u00e8ne \u00e0 des degr\u00e9s divers par l\u2019aluminium liquide.<\/p>\n

\"Fusion<\/p>\n

Le choix d'un bon agent d'affinage et d'un proc\u00e9d\u00e9 d'affinage adapt\u00e9 rev\u00eat \u00e9galement une grande importance. \u00c0 l'heure actuelle, l'affinage de l'alliage d'aluminium 6063 s'effectue principalement par affinage en poudre. Cette m\u00e9thode permet \u00e0 l'agent d'affinage d'entrer pleinement en contact avec l'aluminium en fusion, ce qui optimise son efficacit\u00e9.<\/p>\n

Proc\u00e9d\u00e9 de raffinage adapt\u00e9<\/strong><\/p>\n

Bien que cette fonctionnalit\u00e9 soit \u00e9vidente, le proc\u00e9d\u00e9 de raffinage<\/a> Il convient \u00e9galement de le noter, sinon cela n'aura pas l'effet escompt\u00e9. La pression d'azote utilis\u00e9e lors de l'affinage de la poudre doit \u00eatre faible et permettre de r\u00e9pondre aux exigences li\u00e9es \u00e0 la soufflage de la poudre.<\/p>\n

De plus, la pression de l'azote gazeux est \u00e9lev\u00e9e et les vagues de roulement g\u00e9n\u00e9r\u00e9es par l'aluminium en fusion sont importantes, ce qui augmente le risque de formation de scories oxyd\u00e9es. Si l'on utilise de l'azote de haute puret\u00e9 lors de l'affinage, la pression d'affinage est \u00e9lev\u00e9e et les bulles g\u00e9n\u00e9r\u00e9es sont volumineuses. Ces grosses bulles ont une grande flottabilit\u00e9 dans l'aluminium en fusion ; elles remontent rapidement \u00e0 la surface et leur temps de s\u00e9jour dans l'aluminium en fusion est court. L'efficacit\u00e9 de l'\u00e9limination de l'hydrog\u00e8ne est alors insuffisante, ce qui entra\u00eene une augmentation des co\u00fbts. Il convient donc d'utiliser moins d'azote et davantage de flux de raffinage<\/a>. L'objectif principal du proc\u00e9d\u00e9 d'affinage de la poudre est d'utiliser le moins de gaz possible et de pulv\u00e9riser le plus d'agent d'affinage possible dans l'aluminium fondu.<\/p>\n

Affinage du grain<\/h2>\n

L'affinage du grain est l'un des processus les plus importants dans la coul\u00e9e d'alliages d'aluminium, et c'est \u00e9galement l'une des mesures les plus efficaces pour rem\u00e9dier aux d\u00e9fauts de coul\u00e9e. Dans la coul\u00e9e d'alliages, tous les processus rel\u00e8vent d'une cristallisation hors \u00e9quilibre. La plupart des \u00e9l\u00e9ments d'impuret\u00e9 (y compris, bien s\u00fbr, les \u00e9l\u00e9ments d'alliage) se concentrent aux joints de grains. Plus le grain est fin, plus la surface des joints de grains est importante. La r\u00e9partition des \u00e9l\u00e9ments d'impuret\u00e9 (ou des \u00e9l\u00e9ments d'alliage) s'en trouve d'autant plus homog\u00e8ne.<\/p>\n

En ce qui concerne les \u00e9l\u00e9ments d'impuret\u00e9, cette grande uniformit\u00e9 permet d'en r\u00e9duire les effets n\u00e9fastes, voire de transformer la nocivit\u00e9 d'une faible quantit\u00e9 de ces \u00e9l\u00e9ments en un effet b\u00e9n\u00e9fique. Quant aux \u00e9l\u00e9ments d'alliage, leur grande uniformit\u00e9 permet de tirer pleinement parti de leur pouvoir d'alliage. L'objectif est ainsi d'exploiter pleinement les ressources.<\/p>\n

Dans la production de l'alliage d'aluminium 6063, en ce qui concerne les mat\u00e9riaux abrasifs, la r\u00e9partition homog\u00e8ne des \u00e9l\u00e9ments d'alliage et des impuret\u00e9s rev\u00eat une importance particuli\u00e8re, car il est n\u00e9cessaire d'obtenir une surface de sable uniforme par corrosion. Plus le grain est fin, plus la r\u00e9partition des \u00e9l\u00e9ments d'alliage (et des impuret\u00e9s) est homog\u00e8ne, et plus la surface sabl\u00e9e obtenue apr\u00e8s corrosion est uniforme.<\/p>","protected":false},"excerpt":{"rendered":"

6063 aluminum alloy is widely used in the construction of aluminum doors, windows and curtain walls, and is a common aluminum alloy model. In order…<\/p>","protected":false},"author":1,"featured_media":4436,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[294,295,296],"class_list":["post-2076","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-aluminum-alloy-melting","tag-control-melting-temperature","tag-refining-process"],"yoast_head":"\n6063 Aluminum Alloy Melting and Refining Process<\/title>\n<meta name=\"description\" content=\"The aluminum alloy melting is the most important step in 6063 aluminum alloy casting, it will affect the product quality.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.alalloycasting.com\/fr\/6063-aluminum-alloy-melting\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" 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