{"id":5223,"date":"2019-06-18T07:26:20","date_gmt":"2019-06-18T07:26:20","guid":{"rendered":"http:\/\/www.adtechamm.com\/?p=5223"},"modified":"2019-06-18T07:26:20","modified_gmt":"2019-06-18T07:26:20","slug":"degassing-of-aluminium-alloys","status":"publish","type":"post","link":"https:\/\/www.adtechamm.com\/tr\/degassing-of-aluminium-alloys\/","title":{"rendered":"Al\u00fcminyum Ala\u015f\u0131mlar\u0131n\u0131n Gazdan Ar\u0131nd\u0131r\u0131lmas\u0131"},"content":{"rendered":"

Al\u00fcminyum Ala\u015f\u0131mlar\u0131n\u0131n Gazdan Ar\u0131nd\u0131r\u0131lmas\u0131<\/strong><\/p>\n

Al\u00fcminyum Ala\u015f\u0131mlar\u0131n\u0131n Gazdan Ar\u0131nd\u0131r\u0131lmas\u0131 Sistemi, fiziksel (hidrojen gaz\u0131 kal\u0131nt\u0131lar\u0131), kimyasal (alkali metaller) ve metalurjik (alkali tuzlar\u0131 ve intermetalik \u00e7amur) safs\u0131zl\u0131klar\u0131 gidererek metali temizleyen bir gazdan ar\u0131nd\u0131rma ve ar\u0131tma ekipman\u0131d\u0131r.
\nAdtech, erimi\u015f al\u00fcminyumun en iyi \u015fekilde ar\u0131t\u0131lmas\u0131 i\u00e7in patentli gaz \u00f6n \u0131s\u0131tma sistemi ve di\u011fer geli\u015fmi\u015f \u00f6zellikler sunmaktad\u0131r.
\nSistemin \u00e7al\u0131\u015fmas\u0131, y\u00fcksek enerjili dif\u00fczyon ve kimyasal olarak y\u00f6nlendirilen k\u00fctle transferi gibi kan\u0131tlanm\u0131\u015f ilkelere dayanmaktad\u0131r. S\u0131v\u0131 Al\u00fcminyum Ar\u0131tma Sistemi, end\u00fcstride y\u0131llard\u0131r kullan\u0131lmaktad\u0131r.<\/p>\n

\u0130nert gazla temizleme, Al\u00fcminyum Ala\u015f\u0131mlar\u0131n\u0131n Gazdan Ar\u0131nd\u0131r\u0131lmas\u0131<\/strong>
\n\u0130nert gaz, erimi\u015f al\u00fcminyum ve \u00e7\u00f6z\u00fcnm\u00fc\u015f hidrojenle kimyasal olarak reaksiyona girmeyen ve al\u00fcminyumda \u00e7\u00f6z\u00fcnmeyen bir gaz\u0131 ifade eder; genellikle azot veya argondur.
\nAzot gaz\u0131 s\u0131v\u0131n\u0131n i\u00e7ine \u00fcflendikten sonra \u00e7ok say\u0131da ince kabarc\u0131k olu\u015fur; bu kabarc\u0131klar, eriyikten ge\u00e7erken eriyik i\u00e7indeki oksitlenmi\u015f kal\u0131nt\u0131larla kar\u015f\u0131la\u015f\u0131r ve kal\u0131nt\u0131lar kabarc\u0131klar\u0131n y\u00fczeyine adsorbe olarak kabarc\u0131klarla birlikte eriyik y\u00fczeyine do\u011fru y\u00fckselir. S\u0131v\u0131 y\u00fczeyine ta\u015f\u0131nan oksitler, gaz faz\u0131ndan otomatik olarak ayr\u0131\u015ft\u0131r\u0131lamaz ve al\u00fcminyum s\u0131v\u0131s\u0131na yeniden kat\u0131lamaz; bu nedenle, al\u00fcminyum s\u0131v\u0131s\u0131n\u0131n y\u00fczeyinde birikerek daha sonra uzakla\u015ft\u0131r\u0131lmak \u00fczere bekletilir.
\nAdsorpsiyon, kabarc\u0131k ile eriyik aras\u0131ndaki aray\u00fczde ger\u00e7ekle\u015fti\u011fi i\u00e7in, kabarc\u0131k sadece s\u0131n\u0131rl\u0131 miktarda eriyikle temas edebilir ve bu da c\u00fcruf giderme etkisini s\u0131n\u0131rlar. Ar\u0131tma etkisini art\u0131rmak i\u00e7in, ar\u0131tma gaz\u0131na ne kadar \u00e7ok kabarc\u0131k \u00fcflenirse, kabarc\u0131k yar\u0131\u00e7ap\u0131 o kadar k\u00fc\u00e7\u00fck olur. Da\u011f\u0131l\u0131m ne kadar homojen olursa, \u00fcfleme s\u00fcresi o kadar uzun olur ve c\u00fcruf giderme etkisi o kadar belirgin hale gelir.<\/p>\n

\"Al\u00fcminyum<\/p>\n

AL\u00dcM\u0130NYUM GAZ G\u0130DERME S\u00dcREC\u0130<\/a><\/p>\n

Al\u00fcminyum Ala\u015f\u0131mlar\u0131n\u0131n Gazdan Ar\u0131nd\u0131r\u0131lmas\u0131, k\u0131smi bas\u0131n\u00e7la gazdan ar\u0131nd\u0131rma ilkesine dayan\u0131r. Azot kabarc\u0131\u011f\u0131 i\u00e7indeki ba\u015flang\u0131\u00e7taki P^sO de\u011feri nedeniyle, kabarc\u0131k ile s\u0131v\u0131 al\u00fcminyum aras\u0131ndaki hidrojenin denge k\u0131smi bas\u0131nc\u0131 aras\u0131nda bir fark olu\u015fur; bu sayede metale \u00e7\u00f6z\u00fcnm\u00fc\u015f hidrojen, kabarc\u0131\u011fa s\u00fcrekli olarak yay\u0131l\u0131r. .
\nKabarc\u0131k i\u00e7indeki hidrojen k\u0131smi bas\u0131nc\u0131, al\u00fcminyum s\u0131v\u0131s\u0131ndaki hidrojenin denge k\u0131smi bas\u0131nc\u0131na e\u015fit olana kadar; kabarc\u0131k s\u0131v\u0131 y\u00fczeyinden yukar\u0131 do\u011fru y\u00fckseldikten sonra, kabarc\u0131k i\u00e7indeki hidrojen de atmosfere ka\u00e7ar; b\u00f6ylece kabarc\u0131\u011f\u0131n y\u00fckselme s\u00fcreci, oksit kal\u0131nt\u0131lar\u0131n\u0131 y\u00fczeye \u00e7\u0131kar\u0131r. Hidrojen gaz\u0131 da d\u0131\u015far\u0131 at\u0131l\u0131r ve azot alt\u0131ndaki al\u00fcminyum s\u0131v\u0131s\u0131n\u0131n s\u0131cakl\u0131\u011f\u0131, azot ile al\u00fcminyum s\u0131v\u0131s\u0131n\u0131n reaksiyona girerek al\u00fcminyum nitr\u00fcr olu\u015fturmas\u0131n\u0131 \u00f6nlemek i\u00e7in 710-720 \u00b0C'de tutulur.<\/p>\n

Al\u00fcminyum ve al\u00fcminyum ala\u015f\u0131mlar\u0131n\u0131n parlamay\u0131 \u00f6nleme \u00f6zelliklerine ili\u015fkin gereklilikler, malzemelerin kullan\u0131m alan\u0131na g\u00f6re de\u011fi\u015fiklik g\u00f6sterir.<\/strong>
\nGenel olarak, s\u0131radan \u00fcr\u00fcnler i\u00e7in hidrojen i\u00e7eri\u011fi 0,15-0,2 mL\/(100 gAl) seviyesinin alt\u0131nda tutulmal\u0131 ve metalik olmayan kal\u0131nt\u0131lar\u0131n tekil par\u00e7ac\u0131k boyutu 1 \u03bcm\u2019den k\u00fc\u00e7\u00fck olmal\u0131d\u0131r; \u00f6zel havac\u0131l\u0131k malzemeleri i\u00e7in ise \u00e7ift s\u0131f\u0131r folyonun hidrojen i\u00e7eri\u011fi kontrol edilmelidir. 0,1 mL\/(100 gAl) de\u011ferinin alt\u0131nda, metalik olmayan kal\u0131nt\u0131lar\u0131n tekil par\u00e7ac\u0131k boyutu 5 \u03bcm'den az olmal\u0131d\u0131r. Elbette, \u00f6l\u00e7\u00fclen hidrojen i\u00e7eri\u011fi, tespit y\u00f6ntemine ba\u011fl\u0131 olarak de\u011fi\u015fiklik g\u00f6sterecektir. Metalsiz kal\u0131nt\u0131lar genellikle k\u00fcl\u00e7elerin d\u00fc\u015f\u00fck b\u00fcy\u00fctme oran\u0131nda incelenmesi ve al\u00fcminyumun ultrasonik testi yoluyla nitel olarak veya c\u00fcruf \u00f6l\u00e7erler kullan\u0131larak nicel olarak tespit edilir.
\n\u00c7\u00fcnk\u00fc al\u00fcminyum eriyik ile al\u00fcminyum oksit birbirlerini \u0131slatmazlar. Bunlar termodinamik y\u00fczey enerjisi ili\u015fkisine uymaktad\u0131r; dolay\u0131s\u0131yla al\u00fcminyum eriyik i\u00e7indeki A1203 kal\u0131nt\u0131s\u0131, ar\u0131tma maddesinin y\u00fczeyine adsorbe edilerek uzakla\u015ft\u0131r\u0131labilir.<\/p>\n