Gaz Giderici Ak\u0131\u015fkanlar<\/a>
\nD\u00f6k\u00fcmhanede esas olarak su buhar\u0131n\u0131n ayr\u0131\u015fmas\u0131 sonucu olu\u015fan hidrojen, s\u0131v\u0131 al\u00fcminyum ala\u015f\u0131mlar\u0131nda olduk\u00e7a iyi \u00e7\u00f6z\u00fcn\u00fcrken, kat\u0131 fazda \u00e7\u00f6z\u00fcn\u00fcrl\u00fc\u011f\u00fc \u00e7ok daha d\u00fc\u015f\u00fckt\u00fcr. Al\u00fcminyum kat\u0131la\u015ft\u0131\u011f\u0131nda, \u00e7\u00f6z\u00fcnm\u00fc\u015f fazla hidrojen \u00e7\u00f6zeltiden ayr\u0131l\u0131r ve i\u011fne deli\u011fi b\u00fcy\u00fckl\u00fc\u011f\u00fcnden \u00e7ok daha b\u00fcy\u00fck boyutlara kadar kabarc\u0131klar olu\u015fturur. D\u00f6k\u00fcmden \u00f6nce gazdan ar\u0131nd\u0131r\u0131lmam\u0131\u015f metal, bu t\u00fcr kusurlara kar\u015f\u0131 hassast\u0131r. Gaz giderici ak\u0131\u015fkanlar, hidrojeni, ayr\u0131ca oksitleri ve di\u011fer safs\u0131zl\u0131klar\u0131 da giderir.<\/p>\nEkzotermik Ak\u0131lar
\nBu t\u00fcr eriticiler, c\u00fcrufta hapsolmu\u015f metali serbest b\u0131rakmak ve b\u00f6ylece eritme kay\u0131plar\u0131n\u0131 azaltmak amac\u0131yla c\u00fcrufa uygulan\u0131r.<\/p>\n
F\u0131r\u0131n Duvar\u0131 Temizleme Ak\u0131\u015fkanlar\u0131
\nF\u0131r\u0131n duvarlar\u0131nda biriken oksitler, f\u0131r\u0131n\u0131n \u00f6mr\u00fcn\u00fc k\u0131saltman\u0131n yan\u0131 s\u0131ra i\u015fleri zorla\u015ft\u0131r\u0131r ve f\u0131r\u0131n\u0131n hacmini azalt\u0131r. Birikim kontrol alt\u0131nda tutulmazsa, oksitler \u00e7\u0131kar\u0131lmas\u0131 \u00e7ok zor bir malzeme olan korindon olu\u015fturabilir. Duvar temizleme ak\u0131\u015fkanlar\u0131, birikintileri yumu\u015fat\u0131r ve kaz\u0131nmas\u0131n\u0131 kolayla\u015ft\u0131r\u0131r.<\/p>\n
![\"Al\u00fcminyum](\"http:\/\/www.adtechamm.com\/wp-content\/uploads\/2017\/09\/Slag-Conglomeration-Agent.jpg\")
<\/p>\n
Kaplama ve C\u00fcruf Giderme Ak\u0131\u015fkanlar\u0131
\n(d\u00fc\u015f\u00fck flor\u00fcrl\u00fc, d\u00fc\u015f\u00fck ve y\u00fcksek s\u0131cakl\u0131kta kullan\u0131labilen ve sodyum i\u00e7ermeyen \u00e7e\u015fitleri mevcuttur)<\/p>\n
Al\u00fcminyum kimyasal olarak olduk\u00e7a aktiftir. Yeni a\u00e7\u0131\u011fa \u00e7\u0131kan t\u00fcm y\u00fczeylerde, \u00f6zellikle de erimi\u015f haldeyken, al\u00fcminyum oksitten olu\u015fan sert bir tabaka veya kabuk h\u0131zla olu\u015fur. Eriyi\u011fe hurda veya k\u00fcl\u00e7e ilavesi, kar\u0131\u015ft\u0131rma ve \u00e7alkalama i\u015flemleri, al\u00fcminyum oksidin eriyik i\u00e7inde as\u0131l\u0131 kalmas\u0131na neden olur. Bu oksitler d\u00f6k\u00fcm \u00fcr\u00fcne kar\u0131\u015f\u0131rsa kusurlara yol a\u00e7abilece\u011finden, eriyikten uzakla\u015ft\u0131r\u0131lmalar\u0131 gerekir. Oksitlerin \u00e7o\u011fu al\u00fcminyumdan olu\u015fur, ancak magnezyum, demir, bak\u0131r ve titanyum gibi ala\u015f\u0131m elementleri de kendi oksitlerini olu\u015fturabilir.<\/p>\n
Temizleme ak\u0131\u015fkanlar\u0131, eriyikten oksitleri gidermek i\u00e7in gereklidir; kaplama ak\u0131\u015fkanlar\u0131 ise eriyik y\u00fczeyini oksit olu\u015fumuna kar\u015f\u0131 koruyan bir bariyer g\u00f6revi g\u00f6r\u00fcr. Genellikle ayn\u0131 ak\u0131\u015fkan her iki ama\u00e7 i\u00e7in de kullan\u0131labilir.<\/p>\n
Ak\u0131\u015fkan i\u00e7indeki flor\u00fcr bile\u015fikleri, etkinli\u011fini art\u0131r\u0131r ve daha d\u00fc\u015f\u00fck s\u0131cakl\u0131klarda kullan\u0131lmas\u0131n\u0131 sa\u011flar. Bununla birlikte, flor\u00fcrler zararl\u0131 dumanlar yayabilir; bu nedenle, \u00e7evresel nedenlerle baz\u0131 d\u00f6k\u00fcmhaneler d\u00fc\u015f\u00fck flor\u00fcrl\u00fc ak\u0131\u015fkanlar\u0131 kullanmay\u0131 tercih eder. Sodyum, fosforun tane inceltilmesini engelleyebilece\u011finden, hipereutektik ala\u015f\u0131mlarda (>12% silikon i\u00e7eri\u011fi) sodyum i\u00e7ermeyen ak\u0131\u015fkanlar kullan\u0131l\u0131r. Farkl\u0131 s\u0131cakl\u0131k aral\u0131klar\u0131 i\u00e7in mevcut ak\u0131\u015fkanlar, \u00f6ncelikle erime noktalar\u0131 bak\u0131m\u0131ndan farkl\u0131l\u0131k g\u00f6sterir.<\/p>\n
Sodyum \u0130\u00e7eren Ak\u0131 Modifiye Ediciler
\nSilikon i\u00e7eren hipoeutektik ala\u015f\u0131mlarda, sodyum veya stronsiyum ilavesi, mekanik \u00f6zelliklerde (\u00e7ekme mukavemeti veya uzama) ve d\u00f6k\u00fclebilirlikte iyile\u015fme sa\u011flayan de\u011fi\u015ftirilmi\u015f bir silikon yap\u0131s\u0131 ortaya \u00e7\u0131kar\u0131r. De\u011fi\u015ftirilmi\u015f ala\u015f\u0131mlarda, kat\u0131la\u015fma s\u0131ras\u0131nda meydana gelen d\u00f6k\u00fcm b\u00fcz\u00fclmesi, b\u00fcy\u00fck bo\u015fluklarda lokalize olmak yerine da\u011f\u0131n\u0131k bir \u015fekilde ger\u00e7ekle\u015fir. Sodyum ile modifikasyon, b\u00fcz\u00fclme g\u00f6zeneklili\u011finin \u00f6nlenmesinde de olduk\u00e7a etkilidir.<\/p>\n
Tah\u0131l \u0130ncelme Ak\u0131\u015fkanlar\u0131
\nAl\u00fcminyum ala\u015f\u0131mlar\u0131ndaki tane boyutu, bir d\u00f6k\u00fcm par\u00e7as\u0131 i\u00e7indeki tek tek al\u00fcminyum kristallerinin boyutunu ifade eder. Bu kristallerin boyutu, kat\u0131la\u015fma s\u00fcrecinin en erken a\u015famalar\u0131nda olu\u015fan tane veya \u00e7ekirdek say\u0131s\u0131 ile do\u011frudan ili\u015fkilidir; tane say\u0131s\u0131 ne kadar fazla olursa, tane boyutu o kadar ince olur. \u0130ri tane boyutu, besleme i\u015flemini zorla\u015ft\u0131r\u0131r ve d\u00f6k\u00fcm\u00fcn sa\u011flaml\u0131\u011f\u0131n\u0131 ve mekanik \u00f6zelliklerini d\u00fc\u015f\u00fcr\u00fcr. Tane inceltme i\u015flemi, kat\u0131la\u015fma s\u00fcrecinin erken a\u015famalar\u0131nda kristalle\u015fme \u00e7ekirdeklerinin say\u0131s\u0131n\u0131 art\u0131rarak taneleri k\u00fc\u00e7\u00fclt\u00fcr; bu, t\u0131pk\u0131 bir ya\u011fmur bulutuna kuru buz eklemek gibi bir i\u015flemdir.<\/p>\n
Tah\u0131l ar\u0131tman\u0131n avantajlar\u0131 \u015funlard\u0131r:
\nG\u00f6zeneklili\u011fin da\u011f\u0131l\u0131m\u0131.
\nS\u0131cak g\u00f6zya\u015flar\u0131n\u0131n \u00f6nlenmesi.
\nHava kabarc\u0131klar\u0131n\u0131n \u00f6nlenmesi sayesinde bas\u0131n\u00e7 s\u0131zd\u0131rmazl\u0131\u011f\u0131n\u0131n art\u0131r\u0131lmas\u0131.
\nTitanyum, bor ve zirkonyum, yayg\u0131n olarak kullan\u0131lan tane incelticilerdir. Silikonun al\u00fcminyumdan \u00f6nce \u00e7\u00f6kelme g\u00f6sterdi\u011fi hipereutektik ala\u015f\u0131mlarda, tane inceltme amac\u0131yla fosfor kullan\u0131l\u0131r.<\/p>","protected":false},"excerpt":{"rendered":"
Aluminum Fluxes Aluminum Fluxes Degassing Fluxes Hydrogen, found in the foundry primarily due to the decomposition of water vapor, is very soluble in liquid aluminum alloys, but much less so in the solid phase. When aluminum solidifies, the excess dissolved hydrogen comes out of solution…<\/p>","protected":false},"author":1,"featured_media":2638,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[52],"tags":[],"yoast_head":"\n
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