{"id":3051,"date":"2018-01-23T09:12:45","date_gmt":"2018-01-23T09:12:45","guid":{"rendered":"http:\/\/www.adtechamm.com\/?p=3051"},"modified":"2018-01-23T09:13:04","modified_gmt":"2018-01-23T09:13:04","slug":"flux-for-aluminum-melting","status":"publish","type":"post","link":"https:\/\/www.adtechamm.com\/id\/flux-for-aluminum-melting\/","title":{"rendered":"Flux untuk Peleburan Aluminium"},"content":{"rendered":"

Flux untuk Peleburan Aluminium<\/strong> adalah zat padat (umumnya campuran garam klorida dan fluorida) yang digunakan di pabrik pengecoran aluminium untuk mengurangi oksidasi logam cair, meminimalkan penetrasi hidrogen dari atmosfer, menyerap inklusi non-logam yang tersuspensi dalam logam cair, menjaga dinding tungku\/wadah tetap bersih dari endapan oksida, mengurangi kandungan aluminium yang terperangkap dalam terak, menghilangkan hidrogen yang terlarut dalam logam cair, memperhalus butiran aluminium selama proses pembekuan, memodifikasi inklusi silikon dalam paduan yang mengandung silikon, serta mengoksidasi magnesium yang berlebih.<\/p>\n

Praktik umum dalam penambahan fluks adalah dengan cara manual.
\nSebagian besar bahan pelebur diaplikasikan pada permukaan cairan logam dan diaduk ke dalam cairan logam tersebut. Beberapa bahan pelebur (untuk penghilangan gas dan penghalusan butiran) diturunkan ke dasar wadah menggunakan corong berlubang yang telah dipanaskan terlebih dahulu dan dalam keadaan bersih.<\/p>\n

Bahan pelebur juga dapat dimasukkan ke dalam cairan logam melalui injeksi dalam bentuk bubuk yang disalurkan dalam aliran gas inert (argon atau nitrogen).
\nTeknik injeksi fluks yang paling sederhana adalah dengan menggunakan lancing yang dicelupkan ke dalam cairan logam.
\nMetode pengenalan fluks yang paling efektif adalah injeksi menggunakan degasser rotari.<\/p>\n

\"Flux<\/p>\n

Laju penghilangan gas<\/strong>
\nFlux yang terdiri dari garam-garam yang mengandung klorin dan fluorin digunakan untuk menghilangkan gas dari paduan aluminium cair. Flux penghilang gas umumnya berbentuk tablet. Proses penghilangan gas dimulai ketika sebuah tablet flux ditekan ke dasar tungku menggunakan bel berlubang yang telah dipanaskan terlebih dahulu dan dalam keadaan bersih. Komponen fluks bereaksi dengan aluminium membentuk senyawa gas (klorida aluminium, fluorida aluminium). Gas tersebut menggelembung dan naik melalui cairan logam. Tekanan parsial hidrogen dalam gelembung yang terbentuk sangat rendah, sehingga hidrogen berdifusi dari aluminium cair ke dalam gelembung. Gelembung-gelembung tersebut keluar dari cairan logam dan gas kemudian dibuang melalui sistem pembuangan. Proses ini berlanjut hingga gelembung-gelembung tersebut berhenti. Fluks degassing juga dapat dimasukkan melalui metode injeksi. Dalam hal ini, gas inert berfungsi sebagai pembawa untuk fluks berbentuk butiran. Selain efek degassing, perlakuan degassing ini memungkinkan penghilangan inklusi non-logam yang tersuspensi dalam cairan logam (efek pembersihan).<\/p>\n

Penyuling biji-bijian<\/strong><\/a>
\nBahan pelebur penghalus butiran yang terdiri dari garam-garam yang mengandung titanium dan boron (K\u2082TiF\u2086 dan KBF\u2084). Bahan pelebur tersebut memicu pembentukan banyak inti TiAl\u2083 dan TiB\u2082 saat lelehan aluminium mendingin. Butiran aluminium mulai mengeras di permukaan inti tersebut. Ukuran rata-rata butiran padat ditentukan oleh konsentrasi inti dalam cairan sebelum pengkristalan. Struktur butiran halus ditandai dengan fluiditas yang lebih baik selama proses pengkristalan, tingkat mikrosegregasi pengotor yang rendah, serta porositas susut yang rendah. Metode alternatif untuk pemurnian butiran aluminium adalah dengan memasukkan paduan induk yang mengandung titanium dan boron (misalnya Al-5%Ti-1%B).<\/p>","protected":false},"excerpt":{"rendered":"

Flux For Aluminum Melting is solid substances (commonly mixtures of chloride and fluoride salts) used in aluminum foundries in order to reduce the melt oxidation, minimize penetration of the atmospheric Hydrogen, absorb non-metallic inclusions suspended in the melt, keep the furnace\/ladle wall clean from the…<\/p>","protected":false},"author":1,"featured_media":3034,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[52],"tags":[763,757,758,759],"yoast_head":"\nFlux For Aluminum Melting-AdTech Metallurgical Materials Co.,Ltd.<\/title>\n<meta name=\"description\" content=\"Flux For Aluminum Melting is solid substances (commonly mixtures of chloride and fluoride salts) used in aluminum foundries in order to reduce the melt....\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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