buse de coul\u00e9e<\/a>, ce qui entra\u00eene une r\u00e9partition in\u00e9gale de la masse fondue dans le sens axial du rouleau de coul\u00e9e. Par exemple, si la vitesse d'\u00e9coulement au centre de la sortie de la buse de coul\u00e9e est trop \u00e9lev\u00e9e, le centre du rouleau de coul\u00e9e se dilatera localement, ce qui entra\u00eenera une convexit\u00e9 excessive de ce dernier.<\/p>\n![\"Buse](\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2022\/01\/Aluminum-Caster-Tip-Nozzle.jpg\")
<\/p>\n
La \u00ab bande chaude \u00bb est un d\u00e9faut pr\u00e9sent dans la zone de coul\u00e9e-laminage de l'aluminium en fusion : certaines zones ne sont pas compl\u00e8tement solidifi\u00e9es et sont mises en \u00e9vidence par les cylindres de coul\u00e9e-laminage. Les trous apparaissent dans la moiti\u00e9 sup\u00e9rieure de la section transversale de la billette coul\u00e9e et s\u2019\u00e9tendent dans le sens longitudinal de celle-ci, formant un canal blanc \u00e0 la surface de la billette, l\u00e0 o\u00f9 les trous se sont form\u00e9s. Une partie de ce canal blanc occupe une position fixe et est continue. D\u2019autres se d\u00e9placent lat\u00e9ralement \u00e0 la surface de la bande ; il arrive parfois que deux canaux blancs se d\u00e9pla\u00e7ant lat\u00e9ralement fusionnent en un seul, et qu\u2019un trou apparaisse au point de jonction. Il existe de nombreuses causes \u00e0 l\u2019apparition de points chauds\/trous, mais la r\u00e9partition lat\u00e9rale de la temp\u00e9rature de la masse fondue \u00e0 la sortie de la buse est in\u00e9gale, et la non-solidification partielle de la billette coul\u00e9e est \u00e9galement l\u2019une des causes de ces d\u00e9fauts.<\/p>\n
Comme nous le savons tous, dans l'industrie de la transformation de la feuille d'aluminium, le traitement de la feuille d'aluminium ultra-fine est complexe. Cependant, la production de feuille d'aluminium ultra-fine \u00e0 partir de billettes coul\u00e9es-lamin\u00e9es s'av\u00e8re encore plus difficile, ce qui impose des exigences tr\u00e8s strictes en mati\u00e8re de qualit\u00e9 interne de ces billettes. La structure de l'aluminium buse \u00e0 embout rotatif<\/a> Cela a une incidence directe sur l'uniformit\u00e9 de la r\u00e9partition transversale de la masse de la plaque moul\u00e9e, ce qui favorise l'apparition de d\u00e9fauts de qualit\u00e9 localis\u00e9s sur la plaque moul\u00e9e et la bande au cours du processus de production. Cela affecte les performances de transformation en profondeur de la feuille d'aluminium et peut m\u00eame entra\u00eener directement la mise au rebut du produit.<\/p>","protected":false},"excerpt":{"rendered":"The aluminum caster tip has a great influence on the quality of the cast-rolled strip, especially the uniformity of the velocity distribution and temperature distribution…<\/p>","protected":false},"author":1,"featured_media":10249,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-10248","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\n
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