![\"Al\u00fcminyum](\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/08\/Flux-for-Aluminum-Refining-1.jpg\")
<\/p>\nAl\u00fcminyum ar\u0131tma i\u00e7in ak\u0131 maddesi uygun oranda eklenmelidir. Al\u00fcminyum konsantresi genellikle %0,31 al\u00fcminyum ala\u015f\u0131m\u0131ndan olu\u015fur. Uygulanan y\u00f6ntemde, erimi\u015f al\u00fcminyumun taban\u0131ndan 20 cm uzakl\u0131kta yerle\u015ftirilen diki\u015fsiz \u00e7elik boru kullan\u0131lm\u0131\u015f ve ar\u0131tma maddesi azot veya argon ile p\u00fcsk\u00fcrt\u00fclm\u00fc\u015ft\u00fcr.<\/p>\n
P\u00fcsk\u00fcrtmeyi ar\u0131nd\u0131rd\u0131ktan sonra, 15-20 dakika boyunca azot veya argon \u00fcfleyin. Ar\u0131nd\u0131rma i\u015fleminden sonra 10-15 dakika bekletin ve ard\u0131ndan al\u00fcminyum c\u00fcrufunu temizleyin.<\/p>\n
\u00c7e\u015fitli d\u00f6k\u00fcm halindeki demir d\u0131\u015f\u0131 metaller, gaz emme \u00f6zelli\u011fine sahiptir. Ergitme veya tutma i\u015flemi s\u0131ras\u0131nda, ala\u015f\u0131m s\u0131cakl\u0131\u011f\u0131n\u0131n artmas\u0131yla birlikte emilen gaz\u0131n \u00e7\u00f6z\u00fcn\u00fcrl\u00fc\u011f\u00fc h\u0131zla artar.<\/p>\n
Bu nedenle, eritme ve d\u00f6k\u00fcm s\u00fcrecinin tamam\u0131n\u0131n do\u011fru bir \u015fekilde kontrol edilmesinin yan\u0131 s\u0131ra, ala\u015f\u0131m s\u0131v\u0131s\u0131n\u0131n a\u015f\u0131r\u0131 \u0131s\u0131nmas\u0131n\u0131 \u00f6nlemek i\u00e7in s\u0131v\u0131 alt\u0131n\u0131n y\u00fcksek s\u0131cakl\u0131ktaki \u0131s\u0131 tutma etkisi m\u00fcmk\u00fcn oldu\u011funca azalt\u0131lmal\u0131d\u0131r.<\/p>\n
Erimesi kolay ala\u015f\u0131mlarda, kaplama maddesinin korumas\u0131 alt\u0131nda eritme i\u015flemi ger\u00e7ekle\u015ftirilerek delikler ve pinholes olu\u015fumu \u00f6nlenebilir.<\/p>\n
Al\u00fcminyum ala\u015f\u0131m\u0131n\u0131n oksidasyonunu azaltmak amac\u0131yla, uygun bir eritme f\u0131r\u0131n\u0131 se\u00e7menin yan\u0131 s\u0131ra, kal\u0131p d\u00f6k\u00fcm \u00fcretiminde \u0131s\u0131y\u0131 korumak i\u00e7in bekletme f\u0131r\u0131n\u0131 da kullan\u0131lmal\u0131d\u0131r.<\/p>\n
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Eritme ve bas\u0131n\u00e7l\u0131 d\u00f6k\u00fcm i\u015flemlerinde kar\u0131\u015ft\u0131rmay\u0131 m\u00fcmk\u00fcn oldu\u011funca azalt\u0131n ve s\u0131v\u0131 y\u00fczeyindeki oksit tabakas\u0131n\u0131 bozulmadan koruyun. Ala\u015f\u0131m s\u0131v\u0131s\u0131n\u0131n gereksiz yere a\u015f\u0131r\u0131 \u0131s\u0131nmas\u0131n\u0131 \u00f6nleyin ve ala\u015f\u0131m\u0131n bekletme f\u0131r\u0131n\u0131nda kalma s\u00fcresini k\u0131saltmaya \u00e7al\u0131\u015f\u0131n.<\/p>\n
Bas\u0131n\u00e7l\u0131 d\u00f6k\u00fcm i\u015flemi s\u0131ras\u0131nda, bas\u0131n\u00e7 odas\u0131ndaki gaz\u0131n bir k\u0131sm\u0131 kal\u0131ptan d\u0131\u015far\u0131 at\u0131lamaz ve erimi\u015f metale kar\u0131\u015f\u0131r. Doldurma i\u015flemi s\u0131ras\u0131nda, ak\u0131\u015f h\u0131z\u0131n\u0131 azaltmak i\u00e7in bir kar\u015f\u0131 bas\u0131n\u00e7 olu\u015fur; bu da so\u011fuk b\u00f6lgelerin olu\u015fmas\u0131na, yetersiz d\u00f6k\u00fcmlere, kabarc\u0131k olu\u015fumuna ve gev\u015fek d\u00f6k\u00fcmlere yol a\u00e7ar.<\/p>\n
Bunun neden oldu\u011fu d\u00f6k\u00fcm kusurlar\u0131n\u0131 ortadan kald\u0131rmak i\u00e7in kal\u0131p, tahliye olu\u011fuyla donat\u0131lmal\u0131d\u0131r. Tahliye olu\u011fu genellikle ta\u015fma olu\u011fuyla e\u015fle\u015ftirilir ve ta\u015fma olu\u011funun arka ucunda yer al\u0131r. Baz\u0131 durumlarda tahliye olu\u011fu, kal\u0131p bo\u015flu\u011funa ayr\u0131 olarak da yerle\u015ftirilebilir.<\/p>\n
Erime s\u0131cakl\u0131\u011f\u0131 ne kadar y\u00fcksek olursa, erime s\u00fcresi ve erime sonras\u0131 al\u00fcminyumun tutma s\u00fcresi o kadar uzar; erimi\u015f al\u00fcminyumda hidrojen dif\u00fczyonu o kadar yeterli olur; erimi\u015f al\u00fcminyum taraf\u0131ndan emilen hidrojen miktar\u0131 o kadar artar ve bu durumun meydana gelme olas\u0131l\u0131\u011f\u0131 da o kadar artar.<\/p>\n