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<\/p>\nErimi\u015f al\u00fcminyumdan gaz\u0131n giderilmesi, genellikle bir inert gaz kullan\u0131larak ger\u00e7ekle\u015ftirilir; bu gaz, tipik olarak bir d\u00f6ner gaz giderme \u00fcnitesi vas\u0131tas\u0131yla eriyik i\u00e7ine verilir. Bu gaz giderme i\u015flemi termodinamik yasalarla s\u0131n\u0131rl\u0131d\u0131r; ar\u0131nd\u0131rma gaz\u0131 kabarc\u0131klar\u0131 eriyik i\u00e7ine verildi\u011finde, y\u00fczeye do\u011fru y\u00fckselirken hidrojen toplarlar. En ideal durum, bu hidrojenle doymu\u015f kabarc\u0131klar\u0131n eriyikten ayr\u0131lmas\u0131 ve hidrojen seviyelerini d\u00fc\u015f\u00fcrmesidir. Bu durumda, termodinamik a\u00e7\u0131dan bak\u0131ld\u0131\u011f\u0131nda i\u015flemin verimlili\u011fi 100%'dir. Ancak eriyikteki gaz i\u00e7eri\u011fi azald\u0131k\u00e7a, kabarc\u0131klar i\u00e7indeki hidrojenin denge bas\u0131nc\u0131 da azal\u0131r; dolay\u0131s\u0131yla kalan hidrojeni uzakla\u015ft\u0131rmak i\u00e7in gereken gaz miktar\u0131 artmak zorundad\u0131r.<\/p>\n
1400F (760C) \u00fczerindeki saf al\u00fcminyum i\u00e7in denge gaz giderim h\u0131z\u0131. \u00d6rne\u011fin, 200 de\u011ferindeki bir gaz giderim h\u0131z\u0131, bir litre hidrojeni gidermek i\u00e7in 200 litre inert gaz gerekece\u011fi anlam\u0131na gelir. Bu durum, metalurjistlerin hidrojeni \u00e7ok d\u00fc\u015f\u00fck seviyelere kadar giderme yetene\u011fini s\u0131n\u0131rlar. \u00c7\u00f6z\u00fcn\u00fcrl\u00fck de s\u0131cakl\u0131kla birlikte katlanarak artar; yani 200F (111C)l\u0131k bir art\u0131\u015f, \u00e7\u00f6z\u00fcn\u00fcrl\u00fc\u011f\u00fc iki kat\u0131na \u00e7\u0131kar\u0131r. Di\u011fer t\u00fcm ko\u015fullar sabit kald\u0131\u011f\u0131nda, d\u00f6k\u00fcm al\u00fcminyumun s\u0131cakl\u0131\u011f\u0131n\u0131n y\u00fcksek olmas\u0131, gerekli gaz giderme s\u00fcresini uzat\u0131r.<\/p>\n
Ala\u015f\u0131m elementleri de hidrojenin \u00e7\u00f6z\u00fcn\u00fcrl\u00fc\u011f\u00fcn\u00fc etkileyebilir. Daha y\u00fcksek de\u011ferlere sahip ala\u015f\u0131mlar\u0131n gazdan ar\u0131nd\u0131r\u0131lmas\u0131 daha zordur; bu nedenle, \u00f6rne\u011fin 535 al\u00fcminyumun gazdan ar\u0131nd\u0131r\u0131lmas\u0131, saf al\u00fcminyuma k\u0131yasla d\u00f6rt kat daha uzun s\u00fcrer. Neyse ki bu fakt\u00f6rler kontrol edilebilir ve al\u00fcminyum d\u00f6k\u00fcmlerdeki a\u015f\u0131r\u0131 g\u00f6zeneklili\u011fi gidermek i\u00e7in gereken gaz i\u00e7eri\u011fi ve i\u015flem, \u00e7o\u011fu durumda a\u015f\u0131r\u0131 zorluk \u00e7ekilmeden sa\u011flanabilir.<\/p>\n
<\/p>\n
Erimi\u015f Al\u00fcminyumun Gaz\u0131 Nas\u0131l Giderilir?<\/p>\n
Gaz giderme i\u015flemi genellikle metal d\u00f6k\u00fcm tesisinin \u015fu \u00fc\u00e7 b\u00f6l\u00fcm\u00fcnden birinde ger\u00e7ekle\u015ftirilir:<\/p>\n
1. Ergitme f\u0131r\u0131nlar\u0131 ile bekletme f\u0131r\u0131nlar\u0131 aras\u0131nda metali ta\u015f\u0131mak i\u00e7in kullan\u0131lan transfer kep\u00e7esinde.
\n2. Potal\u0131 f\u0131r\u0131nlarda, genellikle erimi\u015f al\u00fcminyumun d\u00f6k\u00fcm\u00fcnden hemen \u00f6nce.
\n3. S\u0131ral\u0131 bir sistemde, metal bir haz\u0131rlama hatt\u0131 arac\u0131l\u0131\u011f\u0131yla bekletme f\u0131r\u0131nlar\u0131na y\u00f6nlendirildi\u011finde.<\/p>\n