![\"D\u00f6nen](\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2021\/08\/Rotating-Rotor-Degassing-Method.jpg\")
<\/p>\n\u00c7evrimi\u00e7i d\u00f6ner gaz giderme i\u015flemi, t\u00fcm erimi\u015f metal \u00fcretiminde gereklidir. \u00c7evrimi\u00e7i d\u00f6ner gaz giderme y\u00f6nteminde, ar\u0131t\u0131lm\u0131\u015f gaz\u0131n k\u00fc\u00e7\u00fck ve e\u015fit da\u011f\u0131lm\u0131\u015f kabarc\u0131klara d\u00f6n\u00fc\u015ft\u00fcr\u00fclmesi i\u00e7in y\u00fcksek h\u0131zl\u0131 d\u00f6nen bir pervaneden yararlan\u0131l\u0131r. Bu k\u00fc\u00e7\u00fck gaz kabarc\u0131klar\u0131 s\u0131v\u0131 y\u00fczeyine yava\u015f\u00e7a y\u00fckselir ve bu da reaksiyon s\u00fcresini uzat\u0131r.<\/p>\n
Al\u00fcminyumun erime s\u0131cakl\u0131\u011f\u0131nda (700 \u00b0C ve \u00fczeri), su buhar\u0131 hidrojen ve oksijene ayr\u0131\u015f\u0131r. Oksijen, s\u0131v\u0131 al\u00fcminyumla reaksiyona girerek al\u00fcmina olu\u015fturur; hidrojen (H) ise hidrojen atomlar\u0131na (H) ayr\u0131\u015f\u0131r ve s\u0131v\u0131 al\u00fcminyumun i\u00e7ine \u00e7\u00f6z\u00fcn\u00fcr. Bu nedenle, erimi\u015f al\u00fcminyumda hidrojenin \u00e7\u00f6z\u00fcnmesi ka\u00e7\u0131n\u0131lmazd\u0131r ve ne kadar \u00e7\u00f6z\u00fcnece\u011fi havan\u0131n nemine ba\u011fl\u0131d\u0131r. Ard\u0131ndan, erimi\u015f al\u00fcminyumda hidrojenin \u00e7\u00f6z\u00fcn\u00fcrl\u00fc\u011f\u00fc kat\u0131 al\u00fcminyumdakinden \u00e7ok daha y\u00fcksek oldu\u011fundan, \u00e7\u00f6z\u00fcnm\u00fc\u015f hidrojenin kat\u0131la\u015fma s\u0131cakl\u0131\u011f\u0131n\u0131n keskin bir \u015fekilde d\u00fc\u015fmesi s\u0131ras\u0131nda kristal tane s\u0131n\u0131rlar\u0131nda g\u00f6zenekler olu\u015facakt\u0131r. Metal i\u00e7indeki g\u00f6zenekler, metalin mukavemetine zarar verebilir. Metalin mukavemetini art\u0131rmak i\u00e7in, metal s\u0131v\u0131 haldeyken gaz\u0131n b\u00fcy\u00fck bir k\u0131sm\u0131n\u0131n uzakla\u015ft\u0131r\u0131lmas\u0131 d\u00fc\u015f\u00fcn\u00fclmelidir.<\/p>\n
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\u00c7evrimi\u00e7i d\u00f6ner gaz giderme teknolojisi sayesinde daha h\u0131zl\u0131 bir gaz giderme h\u0131z\u0131 elde edilebilir. Grafit \u015faft ve pervane kafas\u0131 erimi\u015f metal havuzuna dald\u0131r\u0131l\u0131r ve b\u00fcy\u00fck kabarc\u0131klar k\u00fc\u00e7\u00fck, homojen kabarc\u0131klara b\u00f6l\u00fcn\u00fcr.<\/p>\n
Ar\u0131t\u0131lm\u0131\u015f gaz\u0131n kabarc\u0131klar\u0131n\u0131n boyutundaki azalma, ar\u0131t\u0131lm\u0131\u015f gaz\u0131n y\u00fczey alan\u0131n\u0131 ve kalma s\u00fcresini \u00f6nemli \u00f6l\u00e7\u00fcde art\u0131r\u0131r. Pervane kafas\u0131n\u0131n kar\u0131\u015ft\u0131rma etkisi, ar\u0131t\u0131lm\u0131\u015f gaz\u0131n daha e\u015fit bir \u015fekilde da\u011f\u0131lmas\u0131n\u0131 sa\u011flar; b\u00f6ylece ar\u0131t\u0131lm\u0131\u015f gaz, al\u00fcminyum s\u0131v\u0131s\u0131ndaki hidrojenle tam olarak temas edebilir ve bu da hidrojenin uzakla\u015ft\u0131r\u0131lmas\u0131na yard\u0131mc\u0131 olur.<\/p>\n
\u00c7evrimi\u00e7i d\u00f6ner gaz giderme y\u00f6ntemi, hidrojen giderme verimlili\u011fini art\u0131rmada etkili olsa da, oksitlerin giderilmesindeki rol\u00fcn\u00fc belirlemek zordur. Yap\u0131lan ara\u015ft\u0131rmalar, d\u00f6ner gaz giderme y\u00f6nteminde olu\u015fan k\u00fc\u00e7\u00fck argon veya azot kabarc\u0131klar\u0131n\u0131n, oksitin s\u0131v\u0131 y\u00fczeyine \u00e7\u0131kmas\u0131na neden olabilece\u011fini g\u00f6stermi\u015ftir.<\/p>\n
Ar\u0131t\u0131lm\u0131\u015f gaza az miktarda klor eklenirse, oksitlerin giderilme verimlili\u011fi art\u0131r\u0131labilir. Klor, erimi\u015f al\u00fcminyumun y\u00fczey gerilimini de\u011fi\u015ftirebildi\u011finden, oksitlerin ar\u0131t\u0131lm\u0131\u015f gaz\u0131n kabarc\u0131klar\u0131na yap\u0131\u015fmas\u0131 kolayla\u015f\u0131r.<\/p>\n