{"id":7150,"date":"2021-10-14T09:25:39","date_gmt":"2021-10-14T09:25:39","guid":{"rendered":"https:\/\/www.aluminiumceramicfiber.com\/?p=7150"},"modified":"2021-10-14T09:25:39","modified_gmt":"2021-10-14T09:25:39","slug":"degassing-flux","status":"publish","type":"post","link":"https:\/\/www.aluminiumceramicfiber.com\/id\/degassing-flux\/","title":{"rendered":"Flux Penghilang Gas"},"content":{"rendered":"

Untuk aluminium dan paduan aluminium, proses penghilangan gas dan pembentukan terak dengan menggunakan fluks merupakan metode yang penting. Saat menggunakan pemurnian dengan fluks, terbentuklah sejumlah besar tetesan fluks yang tersebar dan berukuran halus di dalam cairan logam. Berdasarkan hukum kesetimbangan pelarutan, hidrogen atomik dalam cairan logam dibawa ke permukaan cairan akibat difusi tetesan fluks, sehingga mengurangi kandungan hidrogen dalam cairan logam.<\/p>\n

\"Flux<\/p>\n

Selama proses pengecoran, logam cair mengandung sejumlah besar gas dan mengeras, sehingga membentuk lubang bulat dengan permukaan bagian dalam yang halus pada ingot. Penyebab utama terbentuknya pori-pori adalah: bahan baku yang digunakan dalam keadaan basah, serta tungku dan peralatan yang belum benar-benar kering. Suhu peleburan tinggi, cakupan peleburan buruk, waktu tinggal pada suhu tinggi lama, dan logam cair menyerap sejumlah besar gas. Jika proses penghilangan gas dan pemurnian tidak tuntas, selama proses kristalisasi, gas tidak dapat keluar dari logam cair dan membentuk pori-pori. Setelah proses penekanan, pori-pori tersebut dapat dikompresi, namun proses penekanan ini tidak mudah dilakukan, dan hal ini mudah menyebabkan cacat seperti pembentukan lapisan kulit dan gelembung pada produk yang telah diproses dan dipanaskan, serta berbagai sifat logam tersebut menurun drastis.<\/p>\n

Yang bahan pelebur untuk pengecoran aluminium<\/a> adalah garam dengan titik leleh rendah, kepadatan rendah, tegangan permukaan rendah, aktivitas tinggi, dan kapasitas adsorpsi yang kuat terhadap oksida. Saat menggunakannya, masukkan sepotong kecil fluks ke dalam sangkar besi, lalu masukkan ke bagian bawah tungku pencampur dan aduk bolak-balik. Setelah fluks habis, keluarkan sangkar besi dan diamkan selama 5\u201310 menit. Bersihkan endapan di permukaan, lalu lakukan pengecoran.<\/p>\n

Jika diperlukan, fluks penutup juga dapat ditaburkan di atas permukaan untuk menutupinya. Meskipun fluks dapat melarutkan hidrogen dan menghasilkan gas yang mudah menguap saat bereaksi dengan aluminium, fluks tersebut memiliki efek penghilangan gas. Namun, praktik telah membuktikan bahwa efek degassing tersebut lebih buruk dibandingkan dengan pemurnian gas dan degassing, sedangkan efek penghilangan terak dalam cairan logam jauh lebih baik daripada pemurnian gas. Efek penghilangan terak dari fluks ini terutama dicapai melalui proses adsorpsi, pelarutan, dan reaksi kimia fluks terhadap terak alumina dalam cairan logam.<\/p>","protected":false},"excerpt":{"rendered":"

For aluminum and aluminum alloys, degassing and slagging with flux is an important method. When using flux refining, a large number of dispersed and fine flux droplets are formed in the melt. According to the law of dissolution equilibrium, the atomic hydrogen in the melt is brought to the liquid surface due to the diffusion […]<\/p>\n","protected":false},"author":1,"featured_media":7151,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-7150","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"yoast_head":"\nDegassing Flux Used for Aluminum Smelter and Foundry<\/title>\n<meta name=\"description\" content=\"The degassing flux has a low melting point, low density, low surface tension, high activity, and strong adsorption capacity for oxides.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.aluminiumceramicfiber.com\/id\/degassing-flux\/\" \/>\n<meta property=\"og:locale\" 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