![\"Al\u00fcminyum](\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/05\/Aluminum-Alloy-Casting-1.jpg\")
<\/p>\nAl\u00fcminyum ala\u015f\u0131ml\u0131 d\u00f6k\u00fcm, y\u00fcksek kaliteli al\u00fcminyum \u00fcr\u00fcnler elde etmek a\u00e7\u0131s\u0131ndan \u00f6nemlidir. Al\u00fcminyum ala\u015f\u0131ml\u0131 k\u00fcl\u00e7e homojenle\u015ftirme \u0131s\u0131l i\u015flemine tabi tutulduktan sonra, bazen y\u00fczeyde kabarc\u0131klar olu\u015fur. Al\u00fcminyum ala\u015f\u0131ml\u0131 d\u00f6k\u00fcmlerin y\u00fczeyi da\u011f\u0131n\u0131k bir \u015fi\u015fkinlik \u015feklinde g\u00f6r\u00fcn\u00fcr ve bu \u015fi\u015fkinlik bir oyuktur. B\u00fcy\u00fct\u00fclerek incelendi\u011finde, oyu\u011fun i\u00e7 duvar\u0131nda parlak metalik bir \u0131\u015f\u0131lt\u0131 g\u00f6r\u00fcl\u00fcr.<\/p>\n
Gev\u015fek ve homojen tavlamadan sonra kalan dendrit yap\u0131s\u0131, kabarc\u0131k bo\u015flu\u011funun yak\u0131n\u0131nda yer al\u0131r ve kabarc\u0131\u011f\u0131n i\u00e7 duvar\u0131ndaki kar\u015f\u0131l\u0131k gelen konumdaki dendrit yap\u0131s\u0131 ile bir e\u015fle\u015fme g\u00f6sterir. Elektron mikroskobuyla incelendi\u011finde, kabarc\u0131\u011f\u0131n i\u00e7 duvar\u0131nda teras benzeri bir desen g\u00f6r\u00fcl\u00fcr ve kabarc\u0131\u011f\u0131n y\u00fczeyi gev\u015fektir. Al\u00fcminyum ala\u015f\u0131ml\u0131 k\u00fcl\u00e7enin y\u00fczeyindeki kabarc\u0131klar, d\u00f6k\u00fcmden sonra de\u011fil, ancak d\u00f6k\u00fcm\u00fcn homojen bir \u015fekilde tavlanmas\u0131ndan sonra ortaya \u00e7\u0131kar. Bu, metalurjik bir kusur gibi g\u00f6r\u00fcnmemekle birlikte, k\u00fcl\u00e7e \u00fcretim s\u00fcrecindeki a\u015f\u0131r\u0131 y\u00fcksek hidrojen i\u00e7eri\u011finden kaynaklanmaktad\u0131r.<\/p>\n
<\/p>\n
Al\u00fcminyum ala\u015f\u0131m\u0131n\u0131n eritilmesi s\u00fcrecinde, gaz gideriminin tam olarak ger\u00e7ekle\u015ftirilememesi nedeniyle eriyik i\u00e7inde kalan a\u015f\u0131r\u0131 miktarda gaz (ba\u015fl\u0131ca hidrojen), al\u00fcminyum k\u00fcl\u00e7esinde birikir. Hidrojen i\u00e7eri\u011fi \u00e7ok y\u00fcksek olursa, al\u00fcminyum k\u00fcl\u00e7esinde kabarc\u0131klar olu\u015fur.<\/p>\n
Al\u00fcminyum k\u00fcl\u00e7esinin hidrojen i\u00e7eri\u011finin yan\u0131 s\u0131ra, al\u00fcminyum k\u00fcl\u00e7esinin y\u00fczeyindeki hava kabarc\u0131klar\u0131 da so\u011fuma h\u0131z\u0131 ve homojenle\u015ftirme s\u0131cakl\u0131\u011f\u0131yla ilgilidir. Al\u00fcminyum-magnezyum-silikon ala\u015f\u0131mlar\u0131 \u00fczerine yap\u0131lan ara\u015ft\u0131rmalara g\u00f6re, k\u00fcl\u00e7edeki hidrojen i\u00e7eri\u011fi ayn\u0131 oldu\u011funda, d\u00f6k\u00fcm\u00fcn so\u011fuma h\u0131z\u0131 ne kadar y\u00fcksek ve homojenle\u015ftirme s\u0131cakl\u0131\u011f\u0131 ne kadar y\u00fcksek olursa, al\u00fcminyum k\u00fcl\u00e7enin y\u00fczeyinde kabarc\u0131klar\u0131n olu\u015fmas\u0131 o kadar kolay olur. K\u00fctle aktivitesindeki hidrojen i\u00e7eri\u011fi ne kadar y\u00fcksekse, so\u011fuma h\u0131z\u0131ndan ba\u011f\u0131ms\u0131z olarak \u00fcretim y\u00fczeyindeki kabarc\u0131klar\u0131n homojenle\u015ftirme s\u0131cakl\u0131\u011f\u0131 o kadar d\u00fc\u015f\u00fck olur.<\/p>\n
Al\u00fcminyum ala\u015f\u0131mlar\u0131, d\u00f6k\u00fcm k\u00fcl\u00e7elerinin yan\u0131 s\u0131ra, \u0131s\u0131l i\u015flem s\u0131ras\u0131nda levhalar ve ekstr\u00fczyon \u00fcr\u00fcnleri gibi i\u015flenmi\u015f \u00fcr\u00fcnlerin y\u00fczeyinde de kabarc\u0131klar olu\u015fturabilir. Ayr\u0131ca bu durum, \u0131s\u0131l i\u015flem f\u0131r\u0131n\u0131ndaki a\u015f\u0131r\u0131 nemle de ilgilidir.<\/p>\n
Su buhar\u0131 ve al\u00fcminyum ala\u015f\u0131m\u0131 y\u00fczeyinde atomik hidrojen olu\u015fur. Hidrojen atomu k\u00fc\u00e7\u00fck bir yar\u0131\u00e7apa sahiptir ve tane s\u0131n\u0131rlar\u0131 ile kristal kafes boyunca metal tabakas\u0131na yay\u0131l\u0131r. F\u0131r\u0131ndaki s\u0131cakl\u0131k d\u00fc\u015ft\u00fc\u011f\u00fcnde, f\u0131r\u0131ndaki hidrojen konsantrasyonu \u00e7ok d\u00fc\u015f\u00fck olur ve hidrojen kat\u0131 \u00e7\u00f6zeltiden \u00e7\u00f6kelir. Bas\u0131n\u00e7, atmosfer bas\u0131nc\u0131n\u0131n katlar\u0131 seviyesine ula\u015f\u0131r ve bu da y\u00fczeydeki metali \u015fi\u015firerek kabarc\u0131klar olu\u015fturur.<\/p>\n
![\"Al\u00fcminyum](\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/05\/Aluminum-Alloy-Casting-2.jpg\")
<\/p>\n
Al\u00fcminyum k\u00fcl\u00e7elerinin ve al\u00fcminyum \u00fcr\u00fcnlerin y\u00fczeyinde kabarc\u0131k olu\u015fumunu \u00f6nlemek i\u00e7in a\u015fa\u011f\u0131daki d\u00f6rt husustan yola \u00e7\u0131kabiliriz:<\/p>\n
1. Uygun al\u00fcminyum s\u0131v\u0131s\u0131n\u0131 se\u00e7in gaz giderme sistemi<\/a> ve filtreleme ekipman\u0131<\/a> al\u00fcminyum k\u00fcl\u00e7esindeki hidrojen i\u00e7eri\u011fini en aza indirmek i\u00e7in.<\/p>\n 2. Al\u00fcminyum k\u00fcl\u00e7elere homojen tavlama ve \u0131s\u0131l i\u015flem uygulan\u0131rken, tavlama f\u0131r\u0131n\u0131n\u0131n s\u0131cakl\u0131\u011f\u0131 s\u0131k\u0131 bir \u015fekilde kontrol edilmelidir. Ayr\u0131ca tavlama s\u00fcresi \u00e7ok uzun olmamal\u0131d\u0131r.<\/p>\n 3. Homojen tavlama f\u0131r\u0131n\u0131ndaki nem oran\u0131 \u00e7ok y\u00fcksek olmamal\u0131d\u0131r; ayr\u0131ca \u0131s\u0131l i\u015flem ekipman\u0131n\u0131n bak\u0131m\u0131 ve neme dayan\u0131kl\u0131l\u0131\u011f\u0131 da i\u015f \u00f6zetine dahil edilmelidir.<\/p>\n 4. Al\u00fcminyum ala\u015f\u0131ml\u0131 k\u00fcl\u00e7eler, al\u00fcminyum \u00fcr\u00fcnler ile \u00fcretim aletleri ve gere\u00e7leri kuru tutulmal\u0131 ve nemden korunmal\u0131d\u0131r.<\/p>","protected":false},"excerpt":{"rendered":" Aluminum Alloy Casting is important for getting the high quality aluminum products. After the aluminum alloy ingot is subjected to homogenization heat treatment, sometimes blister…<\/p>","protected":false},"author":1,"featured_media":4461,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[148,236],"class_list":["post-2045","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-aluminum-alloy-casting","tag-aluminum-alloy-ingot"],"yoast_head":"\n