{"id":4989,"date":"2020-12-30T06:05:25","date_gmt":"2020-12-30T06:05:25","guid":{"rendered":"https:\/\/www.aluminiumceramicfiber.com\/?p=4989"},"modified":"2020-12-30T06:05:25","modified_gmt":"2020-12-30T06:05:25","slug":"rotary-degassing-of-molten-aluminum","status":"publish","type":"post","link":"https:\/\/www.aluminiumceramicfiber.com\/id\/rotary-degassing-of-molten-aluminum\/","title":{"rendered":"Penghilangan Gas secara Rotari pada Aluminium Cair"},"content":{"rendered":"

Penghilangan gas secara rotari pada paduan aluminium cair merupakan proses komersial yang banyak digunakan untuk mengendalikan kandungan hidrogen, logam alkali, dan inklusi dalam cairan logam sebelum pengecoran.<\/p>\n

Di pabrik pengecoran saat ini, terdapat dua masalah utama terkait kualitas logam cair: kandungan gas dan inklusi. Saat mengembangkan paduan yang mengeras karena penuaan, keberadaan pori-pori menjadi lebih problematis karena pori-pori yang berada di dekat permukaan selalu menimbulkan gelembung di permukaan. Selain itu, ditemukan bahwa seiring meningkatnya tingkat porositas, sifat mekanis seperti kekuatan tarik mengalami penurunan yang signifikan.<\/p>\n

\"Penghilangan<\/p>\n

Yang penghilang gas tipe rotari<\/a> merupakan cara yang paling ramah lingkungan, ekonomis, dan dapat diulang untuk menghilangkan gas dari aluminium cair. Cara ini dapat memberikan pengoperasian yang hemat biaya dan efisien bagi pabrik pengecoran aluminium.<\/p>\n

Rotor pada unit degassing berputar menyedot gas inert ke dalam aluminium cair dan menghancurkannya menjadi gelembung-gelembung halus yang tersebar merata. Gelembung-gelembung nitrogen yang tersebar halus tersebut tersebar di dalam aluminium cair, menangkap hidrogen terlarut dan inklusi, serta membawanya ke permukaan.<\/p>\n

Proses penghilangan hidrogen dari aluminium didasarkan pada prinsip berikut: hidrogen akan berpindah dari daerah bertekanan tinggi di dalam logam cair ke daerah bertekanan rendah di dalam gas inert. Hidrogen akan tersebar merata di seluruh logam cair, sama seperti halnya hidrogen yang dilepaskan di ruang tertutup mana pun. Hal ini akan menjaga tekanan tetap konstan di seluruh logam cair.<\/p>\n

Kemampuan hidrogen untuk bergerak dalam logam cair dan menyeimbangkan tekanannya hampir secepat di udara. Oleh karena itu, tidak perlu semua logam bersentuhan dengan gas inert. Tingkat dan laju pelepasan gas dari termit bergantung pada dua faktor: laju perpindahan melintasi antarmuka logam\/gas dan luas permukaan gas yang terpapar pada logam.<\/p>\n

Prinsip degassing rotari adalah untuk meningkatkan luas permukaan gas inert yang dimasukkan ke dalam aluminium cair. Semakin besar luas permukaan gelembung gas inert, semakin cepat proses degassing berlangsung. Untuk volume gas yang sama, semakin kecil ukuran gelembung, semakin besar luas permukaan total gas tersebut, dan semakin cepat pula proses degassing berlangsung.<\/p>","protected":false},"excerpt":{"rendered":"

Rotary degassing of molten aluminum alloys is a widely used commercial process to control the content of hydrogen, alkali metals, and inclusions in the melt before casting. In today’s foundries, we recognize two major issues with molten metal quality: gas content and inclusions. When age-hardening alloys are developed, the presence of pores becomes more problematic […]<\/p>\n","protected":false},"author":1,"featured_media":4990,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[85],"tags":[],"class_list":["post-4989","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seo"],"yoast_head":"\nRotary Degassing of Molten Aluminum, Rotating Degassing Unit<\/title>\n<meta name=\"description\" content=\"Rotary degassing of molten aluminum alloys is a widely used commercial process to control the content of hydrogen and inclusions.\" \/>\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\/rotary-degassing-of-molten-aluminum\/\" \/>\n<meta property=\"og:locale\" content=\"id_ID\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Rotary Degassing of Molten Aluminum, Rotating Degassing Unit\" \/>\n<meta property=\"og:description\" content=\"Rotary degassing of molten aluminum alloys is a widely used commercial process to control the content of hydrogen and inclusions.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.aluminiumceramicfiber.com\/id\/rotary-degassing-of-molten-aluminum\/\" \/>\n<meta property=\"og:site_name\" content=\"Tap Out Cone,Refining Flux,Ceramic Foam Filter,Aluminum Cast Materials\" \/>\n<meta property=\"article:published_time\" content=\"2020-12-30T06:05:25+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/12\/Rotary-Degassing-of-Molten-Aluminum.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"400\" \/>\n\t<meta property=\"og:image:height\" content=\"500\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" 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