flux en poudre<\/a> au fond du four. Une fois la charge du four nivel\u00e9e, saupoudrez uniform\u00e9ment une couche de flux en poudre sec pour la recouvrir, puis saupoudrez rapidement le flux \u00e0 la surface du m\u00e9tal fondu \u00e0 nu afin d\u2019\u00e9viter toute inhalation. Le flux est efficace pour \u00e9liminer les impuret\u00e9s, mais son efficacit\u00e9 d\u00e9pend en grande partie des caract\u00e9ristiques physiques et chimiques du flux lui-m\u00eame et du processus de purification, notamment la quantit\u00e9 de flux, les conditions de contact entre le flux et le m\u00e9tal en fusion, ainsi que la temp\u00e9rature de traitement.<\/p>\n![\"\"](\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2021\/09\/Aluminum-Casting-Flux-Purification.jpg\")
<\/p>\n
Dans le processus de fusion des alliages d'aluminium, l'\u00e9limination des scories et le d\u00e9gazage s'effectuent gr\u00e2ce \u00e0 l'adsorption, \u00e0 la dissolution, \u00e0 des r\u00e9actions chimiques et \u00e0 la diff\u00e9rence de pression de gaz entre le fondant et les inclusions. Le fondant utilis\u00e9 pour la purification est un sel pr\u00e9sentant un faible point de fusion, une faible densit\u00e9, une faible tension superficielle, une activit\u00e9 \u00e9lev\u00e9e et une forte capacit\u00e9 d'adsorption des oxydes.<\/p>\n
La capacit\u00e9 d'adsorption du flux d\u00e9pend de sa composition chimique. En ce qui concerne les alliages d'aluminium, toutes choses \u00e9gales par ailleurs, le chlorure pr\u00e9sente une meilleure capacit\u00e9 de mouillage et d'adsorption que le fluorure ; les chlorures de m\u00e9taux alcalins sont plus efficaces que ceux des m\u00e9taux alcalino-terreux ; et le m\u00e9lange de chlorure de sodium et de chlorure de potassium est plus performant que les chlorures purs. L'ajout de fluorure au m\u00e9lange de chlorure de sodium et de chlorure de potassium am\u00e9liore consid\u00e9rablement sa capacit\u00e9 d'adsorption.<\/p>","protected":false},"excerpt":{"rendered":"
There are many types of melting furnace flux used in aluminum alloy casting production, which can be divided into two categories: refining agent and covering…<\/p>","protected":false},"author":1,"featured_media":10352,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[120],"tags":[],"class_list":["post-10350","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fluxes"],"yoast_head":"\n
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