{"id":2708,"date":"2020-07-09T08:58:35","date_gmt":"2020-07-09T08:58:35","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=2708"},"modified":"2020-10-14T08:10:48","modified_gmt":"2020-10-14T08:10:48","slug":"aluminum-ingot-quality","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/aluminum-ingot-quality\/","title":{"rendered":"Qualit\u00e9 des lingots d'aluminium"},"content":{"rendered":"

Si la structure et le principe de conception du moule de moulage sous pression ne sont pas adapt\u00e9s, cela posera non seulement des difficult\u00e9s lors de la fabrication du moule, mais il sera \u00e9galement difficile de garantir la qualit\u00e9 des lingots d'aluminium.<\/p>\n

La fusion de l'aluminium utilise le proc\u00e9d\u00e9 Hall-H\u00e9roult pour extraire l'aluminium m\u00e9tallique de son oxyde, l'alumine. Dans cette m\u00e9thode, l'alumine est dissoute dans de la cryolite dans un creuset \u00e0 environ 1 000 \u00b0C. Le m\u00e9lange est ensuite \u00e9lectrolys\u00e9 afin de d\u00e9poser de l'aluminium liquide, plus dense, sur la cathode situ\u00e9e au fond du creuset. L\u2019aluminium peut ensuite \u00eatre transf\u00e9r\u00e9 vers des \u00e9quipements de moulage ou d\u2019extrusion pour son formage final, ou bien \u00eatre coul\u00e9 en lingots en vue d\u2019une refonte. \u00c0 l\u2019heure actuelle, la plupart des entreprises utilisent la m\u00e9thode du moulage sous pression pour produire des pi\u00e8ces moul\u00e9es sous pression. Cette m\u00e9thode permet non seulement d\u2019obtenir une haute pr\u00e9cision moulage sous pression<\/a> des moules, des surfaces de moulage lisses, de bonnes propri\u00e9t\u00e9s m\u00e9caniques, mais aussi une grande efficacit\u00e9 de production. Toutefois, cette excellente qualit\u00e9 des lingots d\u2019aluminium d\u00e9pend principalement du concept de conception structurelle des pi\u00e8ces moul\u00e9es sous pression.<\/p>\n

\"Qualit\u00e9<\/p>\n

Facteurs influant sur la qualit\u00e9 des lingots d'aluminium<\/h2>\n

1. Le choix des lingots d\u2019aluminium destin\u00e9s au moulage sous pression est soumis \u00e0 certaines contraintes. Les moules de moulage sous pression \u00e9tant soumis \u00e0 des restrictions de temp\u00e9rature, le point de fusion de certains lingots d\u2019aluminium est trop \u00e9lev\u00e9, ce qui r\u00e9duit la dur\u00e9e de vie des moules destin\u00e9s aux pi\u00e8ces d\u00e9tach\u00e9es et entra\u00eene des co\u00fbts suppl\u00e9mentaires importants. \u00c0 ce jour, les lingots d'aluminium produits par moulage sous pression comprennent des alliages de zinc, des lingots d'aluminium, des alliages de magn\u00e9sium, des alliages de cuivre et d'autres m\u00e9taux non ferreux.<\/p>\n

2. La surface du moule de moulage sous pression pr\u00e9sente de petits pores semi-circulaires. Le gaz contenu dans ces pores se dilatant et se contractant \u00e0 haute temp\u00e9rature, la surface de la pi\u00e8ce moul\u00e9e sous pression se bombe. En cons\u00e9quence, l'aspect des pi\u00e8ces moul\u00e9es sous pression s'en trouve alt\u00e9r\u00e9, et leur qualit\u00e9 globale est r\u00e9duite. C'est pourquoi les pi\u00e8ces moul\u00e9es sous pression ne sont g\u00e9n\u00e9ralement pas soumises \u00e0 un traitement thermique ni soud\u00e9es, et ne sont pas adapt\u00e9es \u00e0 une utilisation dans des environnements \u00e0 haute temp\u00e9rature.<\/p>\n

3. La pr\u00e9cision dimensionnelle des pi\u00e8ces moul\u00e9es sous pression est \u00e9galement limit\u00e9e. La taille du moule de moulage sous pression est limit\u00e9e par la force de serrage de la machine de moulage sous pression et par la taille du moule. Par cons\u00e9quent, le proc\u00e9d\u00e9 de moulage sous pression ne convient pas \u00e0 la production de pi\u00e8ces de grande taille, mais uniquement \u00e0 celle de certaines pi\u00e8ces de petite taille. Toutefois, pour les pi\u00e8ces pr\u00e9sentant des surfaces concaves plus complexes, la fabrication des moules de moulage sous pression s'av\u00e8re plus difficile.<\/p>","protected":false},"excerpt":{"rendered":"

If the structure and design principle of the die-casting mold are not good, it will not only bring difficulties to the die-casting mold manufacturing, but…<\/p>","protected":false},"author":1,"featured_media":5558,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[813,812],"class_list":["post-2708","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-die-casting","tag-influencing-factors-of-aluminum-ingot-quality"],"yoast_head":"\nAluminum Ingot Quality Influencing Factors | Die Casting<\/title>\n<meta name=\"description\" content=\"If the structure and design principle of the die-casting mold are not good, it will affect the die casting and aluminum ingot quality.\" \/>\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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