{"id":5632,"date":"2019-08-30T09:27:04","date_gmt":"2019-08-30T09:27:04","guid":{"rendered":"http:\/\/www.adtechamm.com\/?p=5632"},"modified":"2019-08-30T09:27:04","modified_gmt":"2019-08-30T09:27:04","slug":"reference-parameter-on-the-use-of-foam-filters","status":"publish","type":"post","link":"https:\/\/www.adtechamm.com\/tr\/reference-parameter-on-the-use-of-foam-filters\/","title":{"rendered":"K\u00f6p\u00fck filtrelerin kullan\u0131m\u0131na ili\u015fkin referans parametre."},"content":{"rendered":"

K\u00f6p\u00fck filtrelerin kullan\u0131m\u0131na ili\u015fkin referans parametre.<\/p>\n

Gerekli \u00f6zellikler.
\nA\u00e7\u0131k\u00e7as\u0131, filtre, kal\u0131nt\u0131 par\u00e7ac\u0131klar\u0131n\u0131 etkili bir \u015fekilde gidermeli, ancak metal ak\u0131\u015f\u0131na a\u015f\u0131r\u0131 diren\u00e7 g\u00f6stermemelidir. Ba\u015far\u0131l\u0131 bir \u015fekilde \u00e7al\u0131\u015fabilmesi i\u00e7in filtre, d\u00f6k\u00fcm s\u0131ras\u0131nda ortaya \u00e7\u0131kan termal ve mekanik gerilmelere de dayanabilmelidir. Filtre, metal-c\u00fcruf-filtre etkile\u015fimleri nedeniyle t\u0131kanmamal\u0131 ve metal ak\u0131\u015f\u0131 s\u0131ras\u0131nda filtreye etki eden kuvvetler nedeniyle korozyona u\u011framamal\u0131d\u0131r.<\/p>\n

Filtre t\u00fcrleri.
\nPiyasada bulunan filtreler ya 1) sabit kesitli do\u011frudan g\u00f6zeneklere (bal pete\u011fi) ya da 2) k\u00f6p\u00fckleme yoluyla elde edilen, y\u00f6n ve kesit a\u00e7\u0131s\u0131ndan say\u0131s\u0131z de\u011fi\u015fiklik g\u00f6steren birbirine ba\u011fl\u0131 g\u00f6zeneklere sahiptir. \u00dc\u00e7\u00fcnc\u00fc filtre t\u00fcr\u00fc ise huni \u015feklindedir ve huni \u015feklindeki g\u00f6vdede dar yar\u0131klar bulunur. En yayg\u0131n olarak kullan\u0131lan refrakter malzemeler al\u00fcmina, zirkonyum oksit, spinel zirkonyum oksit, silikon karb\u00fcr ve bu malzemelerin kar\u0131\u015f\u0131mlar\u0131d\u0131r.<\/p>\n

 <\/p>\n

G\u00f6zenek boyutu (h\u00fccreler) ve g\u00f6zeneklilik.
\nH\u00fccresel (g\u00f6zenekli) ve seramik k\u00f6p\u00fck filtreler, belirli bir g\u00f6zenek boyutu aral\u0131\u011f\u0131nda \u00fcretilir. H\u00fccresel filtrelerde g\u00f6zenek boyutu genellikle in\u00e7 kare ba\u015f\u0131na h\u00fccre say\u0131s\u0131 oran\u0131 olarak ifade edilir. K\u00f6p\u00fck filtrelerde ise g\u00f6zenek boyutu genellikle bir d\u00fcz \u00e7izginin kesi\u015fti\u011fi g\u00f6zenek say\u0131s\u0131n\u0131n oran\u0131, yani in\u00e7 ba\u015f\u0131na g\u00f6zenek say\u0131s\u0131 olarak ifade edilir.<\/p>\n

Ekstr\u00fcde (ekstr\u00fcde edilmi\u015f) filtrelerin g\u00f6zenek boyutu genellikle in\u00e7 kare ba\u015f\u0131na 64 ile 121 ve 240 g\u00f6zenek aras\u0131nda de\u011fi\u015fmektedir. K\u00f6p\u00fck filtrelerde ise en yayg\u0131n g\u00f6zenek boyutlar\u0131 in\u00e7 ba\u015f\u0131na 10, 20 ve 30 g\u00f6zenektir. Demir ve \u00e7elik d\u00f6k\u00fcmlerinde, yeterli kal\u0131p dolum h\u0131zlar\u0131 sa\u011flamak i\u00e7in daha b\u00fcy\u00fck g\u00f6zenek boyutlar\u0131 tercih edilir. Daha k\u00fc\u00e7\u00fck g\u00f6zenek boyutlar\u0131, ala\u015f\u0131mlar\u0131n \u00e7ok y\u00fcksek a\u015f\u0131r\u0131 \u0131s\u0131nma ile d\u00f6k\u00fcld\u00fc\u011f\u00fc durumlarda ve filtrenin kal\u0131pla birlikte \u0131s\u0131t\u0131ld\u0131\u011f\u0131 hassas d\u00f6k\u00fcmde kullan\u0131labilir.<\/p>\n

Preslenmi\u015f petek filtrelerde ger\u00e7ek g\u00f6zenek boyutlar\u0131 ve y\u00fczey alan\u0131 h\u0131zl\u0131 bir \u015fekilde belirlenir. G\u00f6zenekli filtrelerin geometrisi ise k\u0131yaslanamayacak kadar daha karma\u015f\u0131kt\u0131r. Seramik k\u00f6p\u00fck filtreler, birka\u00e7 \u201cpencere\u201d vas\u0131tas\u0131yla birbirine ba\u011flanan yuvarlak h\u00fccrelerden olu\u015fur. Bu h\u00fccrelerin \u00e7ap\u0131, seramik k\u00f6p\u00fck filtrenin i\u00e7 y\u00fczeyini belirler. Pencere boyutu ise erimi\u015f metalin ge\u00e7i\u015fi i\u00e7in daraltma kanal\u0131n\u0131n \u00e7ap\u0131n\u0131 temsil eder.<\/p>\n

Filtrenin yerle\u015ftirilmesi.
\nFiltreler, kal\u0131b\u0131n alt k\u0131sm\u0131ndaki kal\u0131p yuvas\u0131na yatay olarak yerle\u015ftirilir; bu sayede erimi\u015f metal, filtrenin a\u00e7\u0131k y\u00fczeyinden ge\u00e7ebilir. Metal, filtre y\u00fczeyini h\u0131zla kapatarak filtre yap\u0131s\u0131ndaki termal gradyanlar\u0131 azalt\u0131r. Bu sistem, metalin filtre \u00fczerinde ak\u0131\u015f\u0131ndan kaynaklanabilecek darbelere kar\u015f\u0131 koruma sa\u011flar ve filtre ar\u0131zas\u0131 olas\u0131l\u0131\u011f\u0131n\u0131 azalt\u0131r.<\/p>\n

Filtreler dik konumda da sorunsuz \u00e7al\u0131\u015f\u0131r; ancak bu durumda de\u011fi\u015ftirilmesi daha zordur. Yuvarlak filtrelerin dikey olarak tak\u0131lmas\u0131, kare filtrelere g\u00f6re daha kolayd\u0131r.<\/p>","protected":false},"excerpt":{"rendered":"

Reference parameter on the use of foam filters. Necessary properties. Obviously, the filter should effectively remove particles of inclusions, but not provide excessive resistance to metal flow. To work successfully, the filter must also withstand the thermal and mechanical stresses that occur during casting. 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