cavit\u00e9 de la buse<\/a>, non seulement le ph\u00e9nom\u00e8ne de scories de r\u00e9action, mais aussi le d\u00e9p\u00f4t d\u2019inclusions fines dans la masse fondue. Lorsque la vitesse de coul\u00e9e atteint 7 m\/min, le champ d\u2019\u00e9coulement \u00e0 l\u2019int\u00e9rieur de la cavit\u00e9 de la buse se complexifie \u00e0 mesure que la vitesse de coul\u00e9e augmente, et les particules d\u2019inclusions pr\u00e9sentes dans la masse fondue sont contraintes de subir des mouvements physiques et des collisions. L\u2019int\u00e9rieur du mat\u00e9riau de la buse est constitu\u00e9 de fibres entrelac\u00e9es comportant de nombreux trous. La r\u00e9action entra\u00eene une surface irr\u00e9guli\u00e8re de la buse de coul\u00e9e et la pr\u00e9sence de ses propres trous, de sorte que la surface de la buse de coul\u00e9e pr\u00e9sente une surface sp\u00e9cifique plus importante et une \u00e9nergie d\u2019adsorption plus \u00e9lev\u00e9e, et dispose d\u2019une forte capacit\u00e9 \u00e0 intercepter les inclusions solides non m\u00e9talliques pr\u00e9sentes dans la masse fondue. Parall\u00e8lement, les minuscules particules de TiB pr\u00e9sentes dans l\u2019agent d\u2019affinage ajout\u00e9 au cours du processus de coul\u00e9e seront intercept\u00e9es par les inclusions pr\u00e9sentes sur la buse de coul\u00e9e. Cela affectera non seulement l\u2019affinage du grain de la plaque en aluminium moul\u00e9e finale, mais aggravera \u00e9galement l\u2019obstruction de la buse de coul\u00e9e.<\/p>\nL'augmentation de la rugosit\u00e9 et de la surface sp\u00e9cifique de la cavit\u00e9, provoqu\u00e9e par la r\u00e9action au sein de celle-ci et par la formation de scories, favorise la solidification de l'alliage d'aluminium liquide sur la surface interne de la cavit\u00e9 de la buse, ce qui entra\u00eene un r\u00e9tr\u00e9cissement suppl\u00e9mentaire de cette derni\u00e8re. Parall\u00e8lement, en raison du ph\u00e9nom\u00e8ne de solidification de l\u2019alliage d\u2019aluminium, la force d\u2019adh\u00e9rence entre les inclusions, ainsi qu\u2019entre celles-ci et le mat\u00e9riau de la buse, s\u2019en trouve accrue. Le flux \u00e0 grande vitesse de l'alliage d'aluminium liquide ne parvient pas \u00e0 agir efficacement sur la formation de scories lors de l'\u00e9rosion de la cavit\u00e9 de la buse de coul\u00e9e, ce qui rend le colmatage de la buse de coul\u00e9e susceptible de se produire au cours du processus de coul\u00e9e-laminage.<\/p>","protected":false},"excerpt":{"rendered":"
The casting nozzle is the “throat part” of the continuous casting and rolling mill that the aluminum melt is sent to, and its role is…<\/p>","protected":false},"author":1,"featured_media":9768,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-9754","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\n
Casting Nozzle Clogging, Caster Tips and Nozzle Cavity<\/title>\n<meta name=\"description\" content=\"Once the aluminum casting nozzle clogging problems occur, the casting and rolling machine can only be shut down for replacement.\" \/>\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\/casting-nozzle-clogging\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Casting Nozzle Clogging, Caster Tips and Nozzle Cavity\" \/>\n<meta property=\"og:description\" content=\"Once the aluminum casting nozzle clogging problems occur, the casting and rolling machine can only be shut down for replacement.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.alalloycasting.com\/fr\/casting-nozzle-clogging\/\" \/>\n<meta property=\"og:site_name\" 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<\/p>\n