alliage-ma\u00eetre<\/a> est efficace aussi bien \u00e0 des vitesses de refroidissement faibles qu\u2019\u00e9lev\u00e9es pour l\u2019alliage aluminium-silicium destin\u00e9 \u00e0 y \u00eatre utilis\u00e9. La vitesse de dissolution est tr\u00e8s \u00e9lev\u00e9e (g\u00e9n\u00e9ralement inf\u00e9rieure \u00e0 une minute). Par rapport \u00e0 l\u2019alliage-ma\u00eetre traditionnel \u00e0 base d\u2019aluminium et de strontium moul\u00e9, sa perte de temp\u00e9rature est relativement faible, et ce dernier pr\u00e9sente une teneur en strontium plus faible. L\u2019alliage obtenu \u00e9tant tr\u00e8s ductile, il peut \u00eatre produit sous forme de fil ou de bobine, ce qui permet de l\u2019alimenter \u00e0 l\u2019aide d\u2019un d\u00e9vidoir classique.<\/p>\nLa teneur en strontium se situe de pr\u00e9f\u00e9rence entre 7,5 et 25%. La teneur en aluminium dans l'alliage-m\u00e8re est g\u00e9n\u00e9ralement comprise entre 65 et 95%. L'alliage-m\u00e8re peut contenir une faible quantit\u00e9 d'un ou plusieurs autres \u00e9l\u00e9ments, tels que le fer et le silicium. Il peut \u00e9galement y avoir des traces d\u2019impuret\u00e9s habituelles.<\/p>\n
Dans un mode de r\u00e9alisation pr\u00e9f\u00e9r\u00e9, l'alliage-ma\u00eetre contient \u00e9galement du titane et\/ou du bore, car ces \u00e9l\u00e9ments exercent un tr\u00e8s bon effet d'affinage de la structure sur les cristaux d'aluminium, ce qui permet d'obtenir des alliages d'aluminium-silicium destin\u00e9s \u00e0 la fonderie dont les propri\u00e9t\u00e9s sont encore am\u00e9lior\u00e9es. La teneur en titane est de pr\u00e9f\u00e9rence comprise entre 0,5 et 5%, et la teneur en bore est de pr\u00e9f\u00e9rence comprise entre 0,02 et 2%. De pr\u00e9f\u00e9rence, la teneur en titane est comprise entre 1 et 31 TP3T et la teneur en bore entre 0,05 et 11 TP3T.<\/p>","protected":false},"excerpt":{"rendered":"
The aluminum strontium master alloy is suitable for use as a structure refiner during the solidification of molten aluminum-silicon alloys, and is a molten alloy…<\/p>","protected":false},"author":1,"featured_media":7030,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[138],"tags":[1460,1468,1469,7667,1459,4663],"class_list":["post-7029","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seo","tag-aluminum-alloy-modification-process","tag-aluminum-alloy-modifier","tag-aluminum-strontium-alloy","tag-aluminum-strontium-master-alloy","tag-modification-treatment-technology","tag-sr-modification"],"yoast_head":"\n
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