Erimi\u015f metalin ar\u0131t\u0131lmas\u0131 ve ta\u015f\u0131nmas\u0131 s\u00fcrecinde, oksit kabu\u011fu, intermetalik bile\u015fikler ve ocak par\u00e7alar\u0131 gibi yabanc\u0131 maddeler kolayca erimi\u015f metale kar\u0131\u015farak metalik olmayan kal\u0131nt\u0131lar olu\u015fturur. Bu metalik olmayan kal\u0131nt\u0131lar \u00e7o\u011funlukla oksit kal\u0131nt\u0131lar\u0131d\u0131r. Ergitme ve d\u00f6k\u00fcm s\u00fcrecindeki farkl\u0131 olu\u015fum d\u00f6nemlerine g\u00f6re, birincil oksit kapan\u0131mlar\u0131 ve ikincil oksit kapan\u0131mlar\u0131 olarak s\u0131n\u0131fland\u0131r\u0131labilir.<\/p>\n
Birincil oksit kal\u0131nt\u0131lar\u0131, esas olarak erimi\u015f al\u00fcminyum d\u00f6k\u00fclmeden \u00f6nce olu\u015fan t\u00fcm oksit kal\u0131nt\u0131lar\u0131n\u0131 ifade eder. Birincil oksit kal\u0131nt\u0131lar\u0131, \u015fekillerine g\u00f6re iki t\u00fcre ayr\u0131labilir: Bunlardan biri, makro yap\u0131da d\u00fczensiz da\u011f\u0131l\u0131m g\u00f6steren b\u00fcy\u00fck kal\u0131nt\u0131lard\u0131r. Bu t\u00fcr kal\u0131nt\u0131lar, ala\u015f\u0131m yap\u0131s\u0131n\u0131 s\u00fcreksiz hale getirir, i\u015f par\u00e7as\u0131n\u0131n hava s\u0131zd\u0131rmazl\u0131\u011f\u0131n\u0131 azalt\u0131r ve korozyonun kayna\u011f\u0131 olur. Al\u00fcminyum ala\u015f\u0131mlar\u0131n\u0131n mukavemetini ve plastisitesini \u00f6nemli \u00f6l\u00e7\u00fcde azalt\u0131r ve genellikle par\u00e7alarda \u00e7atlaklar\u0131n kayna\u011f\u0131 olur. \u0130kinci tip oksit kal\u0131nt\u0131lar\u0131 ise, dikkatli bir ar\u0131tma i\u015fleminden sonra bile tamamen giderilemeyen k\u00fc\u00e7\u00fck ve da\u011f\u0131n\u0131k kal\u0131nt\u0131lar\u0131 ifade eder. Bu kal\u0131nt\u0131lar erimi\u015f metalin viskozitesini art\u0131r\u0131r. Kat\u0131la\u015fma s\u0131ras\u0131nda erimi\u015f al\u00fcminyumun besleme kabiliyetini azalt\u0131r ve bu da d\u00f6k\u00fcmlerde b\u00fcz\u00fclmeye kolayca yol a\u00e7ar.<\/p>\n
\u0130kincil oksit kal\u0131nt\u0131lar\u0131, endojen kal\u0131nt\u0131lar olarak da bilinir ve esas olarak d\u00f6k\u00fcm i\u015flemi s\u0131ras\u0131nda olu\u015fur. Genel olarak, endojen kal\u0131nt\u0131lar\u0131n da\u011f\u0131l\u0131m\u0131 nispeten d\u00fczg\u00fcnd\u00fcr ve par\u00e7ac\u0131klar nispeten k\u00fc\u00e7\u00fckt\u00fcr. D\u00f6k\u00fcm i\u015flemi s\u0131ras\u0131nda erimi\u015f al\u00fcminyumun s\u0131\u00e7ramas\u0131 ve t\u00fcrb\u00fclans\u0131, ikincil oksit kal\u0131nt\u0131lar\u0131n\u0131n ba\u015fl\u0131ca kaynaklar\u0131d\u0131r. Kum kal\u0131b\u0131nda, erimi\u015f al\u00fcminyum kumdaki nemle reaksiyona girer ve su, oksijen ve hidrojene ayr\u0131\u015f\u0131r. Oksijen, al\u00fcminyumla reaksiyona girerek oksit kal\u0131nt\u0131lar\u0131 olu\u015fturur; hidrojen ise erimi\u015f al\u00fcminyumda \u00e7\u00f6z\u00fcn\u00fcr.<\/p>\n
Erimi\u015f metal rafinaj ak\u0131s\u0131<\/a> esas olarak f\u0131r\u0131nlarda birincil oksit kal\u0131nt\u0131lar\u0131n\u0131n giderilmesinde kullan\u0131l\u0131r. Seramik k\u00f6p\u00fck filtre<\/a> Erimi\u015f metaldeki kal\u0131nt\u0131lar\u0131 filtreleyebilir; esas olarak ikincil oksit kal\u0131nt\u0131lar\u0131n\u0131n giderilmesinde kullan\u0131l\u0131r.<\/p>","protected":false},"excerpt":{"rendered":" In the process of refining and transportation of molten metal, foreign matter such as oxide scale, intermetallic compounds, and hearth fragments are easily brought into…<\/p>","protected":false},"author":1,"featured_media":7218,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-7217","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\n