{"id":7117,"date":"2020-08-07T08:39:32","date_gmt":"2020-08-07T08:39:32","guid":{"rendered":"http:\/\/www.adtechamm.com\/?p=7117"},"modified":"2020-08-07T08:39:32","modified_gmt":"2020-08-07T08:39:32","slug":"liquid-aluminum-degassing","status":"publish","type":"post","link":"https:\/\/www.adtechamm.com\/tr\/liquid-aluminum-degassing\/","title":{"rendered":"S\u0131v\u0131 al\u00fcminyumun gazdan ar\u0131nd\u0131r\u0131lmas\u0131"},"content":{"rendered":"

S\u0131v\u0131 al\u00fcminyumun gazdan ar\u0131nd\u0131r\u0131lmas\u0131 y\u00f6ntemi<\/strong>
\nY\u00fcksek kaliteli al\u00fcminyum d\u00f6k\u00fcmler \u00fcretmek i\u00e7in, d\u00f6k\u00fcmhaneler erimi\u015f metalden fazla hidrojeni gidermeli ve bunun ger\u00e7ekten b\u00f6yle olup olmad\u0131\u011f\u0131n\u0131 do\u011frulamak amac\u0131yla testler yapmal\u0131d\u0131r.<\/p>\n

S\u0131v\u0131 al\u00fcminyum son derece reaktif oldu\u011fundan, nemli hava veya nemli aletlerle temas etti\u011finde, suyun ayr\u0131\u015fmas\u0131 sonucu eriyik i\u00e7inde hidrojen a\u00e7\u0131\u011fa \u00e7\u0131kar.
\nBu \u00e7\u00f6z\u00fcnm\u00fc\u015f gaz\u0131n a\u015f\u0131r\u0131 miktarlar\u0131n\u0131n, nihai al\u00fcminyum d\u00f6k\u00fcm\u00fcn mekanik \u00f6zellikleri \u00fczerinde zararl\u0131 bir etkisi oldu\u011fu belgelenmi\u015ftir.
\nD\u00f6k\u00fcm yapan herkes i\u00e7in, \u00e7\u00f6z\u00fcnm\u00fc\u015f gazlar\u0131n g\u00f6zeneklilik ve b\u00fcz\u00fclmenin da\u011f\u0131l\u0131m\u0131 ve say\u0131s\u0131 \u00fczerinde \u00f6nemli bir etkiye sahip oldu\u011fu iyi bilinmektedir.
\nAt\u0131klar\u0131 azaltmak i\u00e7in \u00e7\u00f6z\u00fcnm\u00fc\u015f hidrojen seviyesi kontrol edilmelidir. Al\u00fcminyumdaki gaz\u0131 kontrol edebilmek i\u00e7in d\u00f6k\u00fcmc\u00fc iki \u015feyi yerine getirmelidir:
\n1. Eriyi\u011fe hidrojen girmesini \u00f6nlemek ve en aza indirmek.
\n2. D\u00f6kmeden \u00f6nce hidrojen miktar\u0131n\u0131 \u00f6l\u00e7\u00fcn ve hidrojenin tamam\u0131n\u0131 bo\u015falt\u0131n.<\/p>\n

S\u0131v\u0131 al\u00fcminyumdan gaz\u0131n giderilmesi, genellikle bir d\u00f6ner gaz giderme \u00fcnitesi vas\u0131tas\u0131yla eriyik i\u00e7ine verilen bir temizleme gaz\u0131 kullan\u0131larak sa\u011flan\u0131r.
\nS\u0131v\u0131 al\u00fcminyumun gazdan ar\u0131nd\u0131r\u0131lmas\u0131 i\u015flemi, termodinamik yasalar\u0131yla s\u0131n\u0131rl\u0131d\u0131r.
\nErgitmeye ar\u0131nd\u0131rma kabarc\u0131klar\u0131 kat\u0131ld\u0131\u011f\u0131nda, bunlar y\u00fczeye do\u011fru y\u00fckselir ve bu sayede hidrojeni toplar. En iyi durumda, hidrojenle doymu\u015f bu kabarc\u0131klar ergitmeden ayr\u0131l\u0131r ve hidrojen i\u00e7eri\u011fini azalt\u0131r.
\nBu durumda, termodinamik a\u00e7\u0131dan bak\u0131ld\u0131\u011f\u0131nda, i\u015fleme verimlili\u011fi 100%\u2019dir. Ancak, eriyikteki gaz i\u00e7eri\u011fi azald\u0131k\u00e7a, kabarc\u0131klar i\u00e7indeki hidrojenin denge bas\u0131nc\u0131 da azalaca\u011f\u0131ndan, art\u0131k hidrojeni gidermek i\u00e7in gereken temizleme gaz\u0131 miktar\u0131 art\u0131r\u0131lmal\u0131d\u0131r.<\/p>\n

Ala\u015f\u0131m elementleri de hidrojenin \u00e7\u00f6z\u00fcn\u00fcrl\u00fc\u011f\u00fcn\u00fc etkiler.<\/strong>
\nAla\u015f\u0131m elementlerinin rol\u00fc, ala\u015f\u0131m d\u00fczeltme katsay\u0131lar\u0131ndaki de\u011fi\u015fikliklerle belirlenir. Tablo 1\u2019de baz\u0131 yayg\u0131n d\u00f6k\u00fcm ala\u015f\u0131mlar\u0131 g\u00f6sterilmi\u015ftir.
\nDe\u011ferleri daha y\u00fcksek olan ala\u015f\u0131mlar\u0131n gazdan ar\u0131nd\u0131r\u0131lmas\u0131 daha zordur; bu nedenle, \u00f6rne\u011fin, al\u00fcminyum 535\u2019in gazdan ar\u0131nd\u0131rma s\u00fcresi, al\u00fcminyum 535\u2019inkinin d\u00f6rt kat\u0131d\u0131r.
\nSaf al\u00fcminyum. Neyse ki, \u00e7o\u011fu durumda bu fakt\u00f6rler kontrol alt\u0131na al\u0131nabilir ve al\u00fcminyum d\u00f6k\u00fcmlerdeki a\u015f\u0131r\u0131 g\u00f6zeneklili\u011fi ortadan kald\u0131rmak i\u00e7in gereken gaz i\u00e7eri\u011fi ve i\u015flem, a\u015f\u0131r\u0131 zorluklara yol a\u00e7madan sa\u011flanabilir.<\/p>\n

\"S\u0131v\u0131<\/p>\n

Pratik gaz giderme program\u0131<\/strong>
\nGaz giderme i\u015flemi genellikle metal d\u00f6k\u00fcm ekipman\u0131n\u0131n \u015fu \u00fc\u00e7 alan\u0131ndan birinde ger\u00e7ekle\u015ftirilir:
\n1. Aktar\u0131m kep\u00e7esinde, eritme f\u0131r\u0131n\u0131 ile bekletme f\u0131r\u0131n\u0131 aras\u0131nda metalin ta\u015f\u0131nmas\u0131nda kullan\u0131l\u0131r.
\n2. Pota f\u0131r\u0131n\u0131nda, genellikle al\u00fcminyum eriyi\u011fi d\u00f6k\u00fclmeden \u00f6nce.
\n3. Tandem sistemde, metal oluk arac\u0131l\u0131\u011f\u0131yla bekletme f\u0131r\u0131n\u0131na aktar\u0131ld\u0131\u011f\u0131nda.
\n\u0130lk iki se\u00e7enek en yayg\u0131n se\u00e7eneklerdir ve bu iki se\u00e7ene\u011fin gaz giderme i\u015flemini tamamlamak i\u00e7in genellikle d\u00f6ner pervaneli gaz giderici (RID) kullan\u0131l\u0131r.
\nAsl\u0131nda, t\u00fcm d\u00f6ner gaz gidericiler ayn\u0131 de\u011fildir. Verimli k\u00fc\u00e7\u00fck kabarc\u0131klar \u00fcretmek i\u00e7in en iyi nozul tasar\u0131m\u0131na sahip olmak \u00f6nemlidir.
\n\u0130\u015fleme s\u00fcresinin k\u0131salmas\u0131 ve gaz t\u00fcketiminin azalmas\u0131, maliyetlerde \u00f6nemli bir tasarruf sa\u011flayabilir.
\nGe\u00e7mi\u015fte, metal d\u00f6k\u00fcm end\u00fcstrisi genellikle basit nozul tasar\u0131mlar\u0131n\u0131 tercih ediyordu. Bu t\u00fcr makinelerin i\u015fleme maliyeti daha d\u00fc\u015f\u00fck olmakla birlikte, daha b\u00fcy\u00fck kabarc\u0131klar olu\u015fturur.
\nVerimlilikteki d\u00fc\u015f\u00fc\u015f nedeniyle, bu yol yanl\u0131\u015f ekonomik faydalar sa\u011flam\u0131\u015ft\u0131r.<\/p>\n

\u0130\u015flem parametrelerini ayarlay\u0131n<\/strong>
\n\u015eaft yerle\u015ftirildikten sonra, RID \u00fcnitesi s\u0131v\u0131 metalin i\u00e7ine tamamen indirildi\u011finde, s\u0131v\u0131 al\u00fcminyumun gazdan ar\u0131nd\u0131r\u0131lmas\u0131 i\u015flemi ba\u015flat\u0131labilir.
\nEn uygun mil konumu, s\u0131v\u0131 metalde girdap olu\u015fumunu \u00f6nlemek amac\u0131yla pota veya kep\u00e7enin merkez hatt\u0131ndan hafif\u00e7e kayd\u0131r\u0131lm\u0131\u015f konumdur.
\nMerkez \u00e7izgisinden sapma mesafesi genellikle 2-4 in\u00e7tir.
\nB\u00f6lmelerin kullan\u0131lmas\u0131 da iyi bir fikirdir, \u00e7\u00fcnk\u00fc bu b\u00f6lmeler metalin d\u00f6ng\u00fcsel hareketine diren\u00e7 g\u00f6sterebilir ve girdap olu\u015fumunu azaltabilir. \u0130\u00e7inde bir b\u00f6lme bulunmaktad\u0131r. Adtech gaz giderme \u00fcnitesi<\/a>.<\/p>\n

RID\u2019yi do\u011fru konuma yerle\u015ftirin, cihaz\u0131 \u00e7al\u0131\u015ft\u0131r\u0131n ve eksen h\u0131z\u0131n\u0131 300 RPM olarak ayarlay\u0131n.
\n\u0130nert gaz ak\u0131\u015f\u0131 da a\u00e7\u0131lmal\u0131 ve ard\u0131ndan operat\u00f6r gaz ak\u0131\u015f\u0131n\u0131 ve \u015faft h\u0131z\u0131n\u0131 ayarlamal\u0131d\u0131r.
\nS\u0131v\u0131 metalin y\u00fczeyinde y\u00fczen kabarc\u0131klar g\u00f6rene kadar gaz ak\u0131\u015f\u0131n\u0131 art\u0131rmal\u0131s\u0131n\u0131z.
\nHava ak\u0131\u015f\u0131 artt\u0131k\u00e7a, kabarc\u0131klar\u0131n boyutu da artmal\u0131d\u0131r.<\/p>\n

\u0130stenen sonu\u00e7, y\u00fczeyin nispeten sakin kalmas\u0131n\u0131 sa\u011flarken k\u00fc\u00e7\u00fck kabarc\u0131klar\u0131n iyi bir \u015fekilde da\u011f\u0131lmas\u0131d\u0131r.
\nAk\u0131\u015f ve \u015faft h\u0131z\u0131 aras\u0131ndaki en uygun kombinasyonu belirlerken, ileride kullanmak \u00fczere bu parametrelere dikkat ediniz.
\nAyr\u0131ca, s\u0131cakl\u0131k y\u00fcksek olmad\u0131\u011f\u0131 veya gereken gaz miktar\u0131 az olmad\u0131\u011f\u0131 s\u00fcrece, toplam gaz giderme s\u00fcresinin genellikle d\u00f6rt ile sekiz dakika aras\u0131nda oldu\u011funu da unutmay\u0131n.<\/p>","protected":false},"excerpt":{"rendered":"

Liquid aluminum degassing method In order to produce high-quality aluminum castings, foundries must remove excess hydrogen from the molten metal while conducting tests to ensure that this is indeed the case. Liquid aluminum is extremely reactive, so when it comes in contact with moist air…<\/p>","protected":false},"author":1,"featured_media":7118,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[52],"tags":[],"yoast_head":"\nLiquid aluminum degassing | Adtech China -sales@adtechamm.com<\/title>\n<meta name=\"description\" content=\"Liquid aluminum degassing process is limited by the laws of thermodynamics. 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