{"id":12417,"date":"2022-01-21T03:54:04","date_gmt":"2022-01-21T03:54:04","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=12417"},"modified":"2022-01-21T03:54:04","modified_gmt":"2022-01-21T03:54:04","slug":"%d0%bb%d0%b8%d1%82%d0%b5%d0%b9%d0%bd%d1%8b%d0%b5-%d0%b8-%d0%bf%d1%80%d0%be%d0%ba%d0%b0%d1%82%d0%bd%d1%8b%d0%b5-%d1%81%d0%be%d0%bf%d0%bb%d0%b0","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/%d0%bb%d0%b8%d1%82%d0%b5%d0%b9%d0%bd%d1%8b%d0%b5-%d0%b8-%d0%bf%d1%80%d0%be%d0%ba%d0%b0%d1%82%d0%bd%d1%8b%d0%b5-%d1%81%d0%be%d0%bf%d0%bb%d0%b0\/","title":{"rendered":"Buses de coul\u00e9e et de laminage"},"content":{"rendered":"

Les buses de coul\u00e9e et de laminage sont calcin\u00e9es \u00e0 haute temp\u00e9rature et ne contiennent aucune substance organique. Leur taux de retrait \u00e0 800 \u00b0C est nul, ce qui permet de les utiliser dans divers laminoirs \u00e0 deux cylindres destin\u00e9s \u00e0 la coul\u00e9e continue de brutes. Buse de coul\u00e9e douce en fibre c\u00e9ramique sans bille de scories, utilis\u00e9e pour la production de t\u00f4les et de feuilles d'aluminium destin\u00e9es aux mat\u00e9riaux d'emballage m\u00e9dicaux et alimentaires. Buse de coul\u00e9e dure en fibre c\u00e9ramique, sans bille de scories ni charge import\u00e9e, pr\u00e9sentant des caract\u00e9ristiques de haute r\u00e9sistance, de surface lisse et de r\u00e9sistance \u00e0 l'usure, et adapt\u00e9e \u00e0 la coul\u00e9e et au laminage \u00e0 grande vitesse de t\u00f4les d'aluminium.<\/p>\n

Les buses de coul\u00e9e et de laminage sont fabriqu\u00e9es \u00e0 partir de mat\u00e9riaux de haute qualit\u00e9 (\u00e0 l'exception du silicate de sodium) ; elles pr\u00e9sentent un rev\u00eatement antiadh\u00e9sif en aluminium de bonne qualit\u00e9, une faible conductivit\u00e9 thermique, une r\u00e9sistance thermique \u00e9lev\u00e9e, une densit\u00e9 homog\u00e8ne, une surface lisse et des dimensions pr\u00e9cises.<\/p>\n

Les protub\u00e9rances en forme de bandes qui apparaissent sur toute la longueur de la surface d'un produit en aluminium constituent un d\u00e9faut de surface du mat\u00e9riau en aluminium. Sur le c\u00f4t\u00e9 du produit, on observe une protub\u00e9rance unilat\u00e9rale accompagn\u00e9e de protub\u00e9rances bilat\u00e9rales de part et d'autre. Certaines d'entre elles sont pr\u00e9sentes sur l'ensemble du produit, tandis que d'autres apparaissent localement, de mani\u00e8re sporadique ou p\u00e9riodique. Les protub\u00e9rances apparaissant \u00e0 la surface du produit doivent \u00eatre \u00e9limin\u00e9es.<\/p>\n

\"Buses<\/p>\n

Conseils aux lanceurs de sorts<\/a> Ils fendent l'\u00e9pi, car lors du laminage, le m\u00e9tal s'\u00e9coule dans l'orifice fini, tandis que les exc\u00e8s de m\u00e9tal sont expuls\u00e9s dans l'interstice du cylindre. Les causes pr\u00e9cises sont les suivantes :
\n(1) Une conception inad\u00e9quate de l'orifice, un mauvais r\u00e9glage du laminoir ou une usure importante de l'orifice dans le produit fini, ce qui entra\u00eene la pr\u00e9sence d'un grand nombre d'orifices dans le produit fini et, par cons\u00e9quent, la formation d'oreilles des deux c\u00f4t\u00e9s ;
\n(2) Le guide d'entr\u00e9e de l'orifice fini est mal install\u00e9, mal ajust\u00e9, le jeu est trop important, ou le type d'orifice d'entr\u00e9e ne se pr\u00eate pas \u00e0 la fabrication d'une oreille unilat\u00e9rale ou d'une oreille bilat\u00e9rale discontinue ;
\n(3) La temp\u00e9rature du produit lamin\u00e9 est faible ou l'\u00e9cart de temp\u00e9rature sur toute la longueur est important ;
\n(4) Mauvais r\u00e9glage du laminoir continu.
\n(5) Le m\u00e9tal est d\u00e9coup\u00e9 au niveau de l'ouverture avant du produit fini, ce qui entra\u00eene l'apparition d'une enveloppe convexe \u00e0 la surface du produit lamin\u00e9 et la formation d'une oreille p\u00e9riodique lors du laminage.<\/p>\n

M\u00e9thodes de pr\u00e9vention et de r\u00e9solution :<\/strong>
\n(1) Choisissez un coefficient de largeur adapt\u00e9 et am\u00e9liorez la conception de l'orifice ;
\n(2) renforcer le r\u00e9glage du laminoir et r\u00e9partir judicieusement la r\u00e9duction ;
\n(3) Installez correctement le guide de l'orifice d'entr\u00e9e pr\u00e9assembl\u00e9 ;
\n(4) Remplacez la rainure us\u00e9e en cas d'usure importante ;
\n(5) Am\u00e9liorer la qualit\u00e9 du chauffage de la pi\u00e8ce et obtenir une temp\u00e9rature homog\u00e8ne.<\/p>","protected":false},"excerpt":{"rendered":"

\u041b\u0438\u0442\u0435\u0439\u043d\u044b\u0435 \u0438 \u043f\u0440\u043e\u043a\u0430\u0442\u043d\u044b\u0435 \u0441\u043e\u043f\u043b\u0430 \u043f\u0440\u043e\u043a\u0430\u043b\u0438\u0432\u0430\u044e\u0442\u0441\u044f \u043f\u0440\u0438 \u0432\u044b\u0441\u043e\u043a\u043e\u0439 \u0442\u0435\u043c\u043f\u0435\u0440\u0430\u0442\u0443\u0440\u0435 \u0438 \u043d\u0435 \u0441\u043e\u0434\u0435\u0440\u0436\u0430\u0442 \u043e\u0440\u0433\u0430\u043d\u0438\u0447\u0435\u0441\u043a\u0438\u0445 \u0432\u0435\u0449\u0435\u0441\u0442\u0432. \u0421\u043a\u043e\u0440\u043e\u0441\u0442\u044c \u0443\u0441\u0430\u0434\u043a\u0438 \u043f\u0440\u0438 800 \u00b0\u0421 \u0440\u0430\u0432\u043d\u0430 \u043d\u0443\u043b\u044e, \u0447\u0442\u043e \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0435\u0433\u043e \u0432…<\/p>","protected":false},"author":1,"featured_media":12418,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[13198,13199],"class_list":["post-12417","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-13198","tag-13199"],"yoast_head":"\n\u041b\u0438\u0442\u0435\u0439\u043d\u044b\u0435 \u0438 \u043f\u0440\u043e\u043a\u0430\u0442\u043d\u044b\u0435 \u0441\u043e\u043f\u043b\u0430, \u041d\u0430\u043a\u043e\u043d\u0435\u0447\u043d\u0438\u043a \u0438\u0437 \u043a\u0435\u0440\u0430\u043c\u0438\u0447\u0435\u0441\u043a\u043e\u0433\u043e \u0432\u043e\u043b\u043e\u043a\u043d\u0430<\/title>\n<meta name=\"description\" content=\"\u041b\u0438\u0442\u0435\u0439\u043d\u044b\u0435 \u0438 \u043f\u0440\u043e\u043a\u0430\u0442\u043d\u044b\u0435 \u0441\u043e\u043f\u043b\u0430 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