{"id":4625,"date":"2020-09-10T07:35:37","date_gmt":"2020-09-10T07:35:37","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=4625"},"modified":"2020-09-10T07:35:37","modified_gmt":"2020-09-10T07:35:37","slug":"rotary-degassing-with-nitrogen","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/tr\/rotary-degassing-with-nitrogen\/","title":{"rendered":"Azotla D\u00f6ner Gaz Giderme"},"content":{"rendered":"

Azotlu D\u00f6ner Gaz Giderme y\u00f6ntemi ilk olarak b\u00fcy\u00fck eritme f\u0131r\u0131nlar\u0131ndaki s\u00fcrekli ar\u0131tma i\u015flemlerinde uygulanm\u0131\u015ft\u0131r. \u0130nert gaz, \u00f6zel olarak tasarlanm\u0131\u015f d\u00f6ner bir \u00e7ubuk ve kanat\u00e7\u0131klar arac\u0131l\u0131\u011f\u0131yla s\u0131v\u0131ya verilir. Noz\u00fcl\u00fcn d\u00f6n\u00fc\u015f\u00fc ve kanat\u00e7\u0131klar\u0131n kesme etkisi, inert gaz kabarc\u0131klar\u0131n\u0131n pota s\u0131v\u0131s\u0131 i\u00e7inde e\u015fit \u015fekilde da\u011f\u0131lmas\u0131n\u0131 sa\u011flar. Ayn\u0131 zamanda, s\u0131v\u0131n\u0131n derin k\u0131sm\u0131nda yava\u015f\u00e7a y\u00fckselen bir girdap olu\u015fur; b\u00f6ylece kabarc\u0131k ile s\u0131v\u0131 aras\u0131nda en geni\u015f temas alan\u0131 sa\u011flan\u0131r ve bu da etkili hidrojen giderimi ve c\u00fcruf giderimi i\u00e7in elveri\u015fli ko\u015fullar yarat\u0131r.<\/p>\n

Buna ek olarak, inert gaz ile erimi\u015f al\u00fcminyum aras\u0131nda herhangi bir kimyasal reaksiyon meydana gelmez ve kabarc\u0131klar\u0131n y\u00fczeyinde, hidrojeni ve oksitlenmi\u015f c\u00fcrufu kolayca emebilen ve kabarc\u0131klar\u0131n kald\u0131rma kuvveti sayesinde s\u0131v\u0131 y\u00fczeyine y\u00fckselen bir pasivasyon tabakas\u0131 bulunmaz. Buna ek olarak, gaz d\u00f6nen kanatlar taraf\u0131ndan kesilir, kabarc\u0131klar eriyik i\u00e7inde son derece homojen bir \u015fekilde da\u011f\u0131l\u0131r ve eriyik makul \u00f6l\u00e7\u00fcde kar\u0131\u015ft\u0131r\u0131l\u0131r; b\u00f6ylece aray\u00fcz ve etki alan\u0131 \u00f6nemli \u00f6l\u00e7\u00fcde geni\u015fler, etki s\u00fcresi uzar ve hidrojenin kabarc\u0131klara dif\u00fczyonu artar. K\u00fctle transferinin konsantrasyon gradyan\u0131, hidrojen giderimi ve c\u00fcruf gideriminin rol\u00fcn\u00fc g\u00fc\u00e7lendirir.<\/p>\n

Erimi\u015f havuzun derin k\u0131sm\u0131ndaki kuvvetli kar\u0131\u015ft\u0131rma, k\u00fc\u00e7\u00fck c\u00fcruf kal\u0131nt\u0131lar\u0131n\u0131n birikmesini de te\u015fvik eder ve y\u00fczen maddelerin uzakla\u015ft\u0131r\u0131lmas\u0131n\u0131 kolayla\u015ft\u0131r\u0131r. Ala\u015f\u0131m\u0131n s\u0131v\u0131 y\u00fczeyi, \u015fiddetli \u00e7alkant\u0131 olmaks\u0131z\u0131n sadece d\u00fczenli bir \u015fekilde d\u00f6ner; bu nedenle c\u00fcruf olu\u015fumu daha azd\u0131r ve hava emilimi de daha azd\u0131r.<\/p>\n

\u0130nsanlar toz halindeki maddeyi p\u00fcsk\u00fcrt\u00fcyor ar\u0131tma maddesi<\/a> Klor\u00fcr ve inert gaz\u0131n birlikte potan\u0131n taban\u0131na p\u00fcsk\u00fcrt\u00fclmesi yoluyla, bir dizi fiziksel ve kimyasal etki sayesinde gaz giderme ve c\u00fcruf giderme ama\u00e7lar\u0131na ula\u015f\u0131l\u0131r. S\u0131v\u0131daki gaz ve c\u00fcruf kal\u0131nt\u0131lar\u0131 \u00f6nemli \u00f6l\u00e7\u00fcde azal\u0131r; hidrojen giderme ve c\u00fcruf giderme etkileri belirgindir. Bunun nedeni, d\u00f6nen p\u00fcsk\u00fcrtme i\u015flemi ger\u00e7ekle\u015ftirilirken, noz\u00fcl\u00fcn d\u00f6nen kanatlar\u0131n\u0131n gaz\u0131 keserken ayn\u0131 zamanda ar\u0131tma maddesini potadaki s\u0131v\u0131 i\u00e7inde e\u015fit bir \u015fekilde da\u011f\u0131tmas\u0131d\u0131r. Al\u00fcminyum s\u0131v\u0131s\u0131n\u0131n \u00e7e\u015fitli k\u0131s\u0131mlar\u0131, ar\u0131tma maddesinin al\u00fcminyum s\u0131v\u0131s\u0131ndaki gazla daha tam olarak reaksiyona girmesini sa\u011flar ve etki s\u00fcresi uzar; bu da al\u00fcminyum s\u0131v\u0131s\u0131ndaki kal\u0131nt\u0131lar\u0131n ve gaz\u0131n giderilmesine daha elveri\u015flidir.<\/p>\n

\"Azotla<\/p>\n

Test s\u00fcrecinde, ayn\u0131 ar\u0131tma maddesi kullan\u0131larak; ar\u0131tma maddesinin a\u011f\u0131rl\u0131\u011f\u0131 ve gaz giderme s\u00fcresinin ayn\u0131 oldu\u011fu ko\u015fulda, manuel gaz giderme y\u00f6ntemiyle kar\u015f\u0131la\u015ft\u0131r\u0131ld\u0131\u011f\u0131nda, gaz giderme i\u015fleminden sonra ala\u015f\u0131m c\u00fcruf kal\u0131nt\u0131 durumu ve i\u011fne deli\u011fi derecesi incelenmi\u015ftir. Bu durum, ar\u0131tma maddesinin ve inert gaz\u0131n \u00f6zel olarak tasarlanm\u0131\u015f d\u00f6ner \u00e7ubuklar ve b\u0131\u00e7aklar arac\u0131l\u0131\u011f\u0131yla s\u0131v\u0131ya enjekte edilmesinden kaynaklanmaktad\u0131r. Noz\u00fcl\u00fcn d\u00f6n\u00fc\u015f\u00fc ve b\u0131\u00e7aklar\u0131n kesme hareketi sayesinde, ar\u0131tma maddesi ve inert gaz eriyik i\u00e7inde ayn\u0131 anda e\u015fit bir \u015fekilde da\u011f\u0131t\u0131l\u0131r. Bu homojen da\u011f\u0131l\u0131m derecesi, manuel gaz gidermedeki homojen da\u011f\u0131l\u0131m derecesinden \u00e7ok farkl\u0131d\u0131r. S\u00fcre\u00e7 s\u0131ras\u0131nda gaz giderme i\u015flemi<\/a>, erimi\u015f al\u00fcminyumun y\u00fczeyine bak\u0131ld\u0131\u011f\u0131nda kaynama derecesi g\u00f6r\u00fclebilir. D\u00f6nen jetli gaz giderme i\u015fleminde s\u0131v\u0131 y\u00fczeyindeki kabarc\u0131klar\u0131n boyutu ve kaynama derecesi temelde ayn\u0131d\u0131r; oysa manuel gaz giderme i\u015fleminde s\u0131v\u0131 y\u00fczeyindeki kabarc\u0131klar kaynamaz. Ayn\u0131 a\u011f\u0131rl\u0131ktaki ar\u0131tma maddesi i\u00e7in, etki s\u00fcresi fark\u0131 yakla\u015f\u0131k 1\/3\u2019t\u00fcr.<\/p>\n

Geleneksel al\u00fcminyum ala\u015f\u0131m\u0131 s\u0131v\u0131 ar\u0131tma i\u015flemiyle kar\u015f\u0131la\u015ft\u0131r\u0131ld\u0131\u011f\u0131nda, Azotlu D\u00f6ner Gaz Giderme ar\u0131tma teknolojisi a\u015fa\u011f\u0131daki avantajlara sahiptir:<\/p>\n