{"id":4881,"date":"2020-12-23T07:22:43","date_gmt":"2020-12-23T07:22:43","guid":{"rendered":"https:\/\/www.aluminiumceramicfiber.com\/?p=4881"},"modified":"2020-12-23T07:22:43","modified_gmt":"2020-12-23T07:22:43","slug":"degassing-of-aluminum-alloy-casting","status":"publish","type":"post","link":"https:\/\/www.aluminiumceramicfiber.com\/id\/degassing-of-aluminum-alloy-casting\/","title":{"rendered":"Penghilangan Gas pada Coran Paduan Aluminium"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-4882\" src=\"https:\/\/aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/12\/Degassing-of-Aluminum-Alloy-Casting.jpg\" alt=\"Penghilangan Gas pada Coran Paduan Aluminium\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/12\/Degassing-of-Aluminum-Alloy-Casting.jpg 500w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/12\/Degassing-of-Aluminum-Alloy-Casting-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>Proses penghilangan gas pada coran paduan aluminium sangat penting untuk menghasilkan produk aluminium berkualitas tinggi.<\/p>\n<p>Setelah proses perlakuan panas homogenisasi pada ingot paduan aluminium, terkadang terbentuk gelembung-gelembung permukaan (blister) di permukaannya. Permukaan coran paduan aluminium tampak berupa tonjolan-tonjolan yang tersebar, dan tonjolan-tonjolan tersebut merupakan rongga. Jika diamati dengan pembesaran, dinding bagian dalam rongga tersebut memiliki kilau logam yang berkilau.<\/p>\n<p>Struktur dendritik yang tersisa setelah proses anil yang longgar dan seragam akan berada di dekat rongga gelembung, dan struktur dendritik pada posisi yang sesuai di dinding bagian dalam gelembung memiliki hubungan yang saling berkaitan. Berdasarkan pengamatan dengan mikroskop elektron, dinding bagian dalam gelembung memiliki pola trapesium, sedangkan permukaan gelembung tampak longgar. Setelah pengecoran, tidak terdapat gelembung pada permukaan ingot paduan aluminium, dan hal ini baru terjadi setelah ingot tersebut dianil secara seragam. Hal ini tampaknya bukan merupakan cacat metalurgi, melainkan disebabkan oleh kandungan hidrogen yang tinggi dalam proses pengecoran ingot.<\/p>\n<p>Dalam proses peleburan paduan aluminium, akibat proses penghilangan gas yang tidak tuntas, gas berlebih (terutama hidrogen) yang masih tersisa dalam cairan peleburan akan terperangkap dalam ingot aluminium. Jika kadar hidrogennya terlalu tinggi, gelembung akan terbentuk di dalam ingot aluminium.<\/p>\n<p>Uap air dan permukaan paduan aluminium menghasilkan hidrogen atomik. Atom hidrogen memiliki jari-jari yang kecil dan berdifusi ke dalam lapisan logam sepanjang batas butir dan kisi kristal. Ketika suhu di dalam tungku diturunkan, konsentrasi hidrogen di dalam tungku menjadi sangat rendah, dan hidrogen mengendap dari larutan padat. Ketika tekanan mencapai beberapa kali tekanan atmosfer, logam pada permukaan mengembang dan membentuk gelembung.<\/p>\n<p>Untuk mencegah munculnya gelembung di permukaan ingot aluminium dan produk aluminium, proses penghilangan gas pada pengecoran paduan aluminium sangatlah penting. Kita dapat memilih cairan aluminium yang sesuai <a href=\"https:\/\/www.aluminiumceramicfiber.com\/id\/degassing-system\/\">sistem penghilang gas<\/a> serta peralatan penyaringan untuk meminimalkan kandungan hidrogen pada ingot aluminium.<\/p>","protected":false},"excerpt":{"rendered":"<p>The degassing of aluminum alloy casting is very important for obtaining high-quality aluminum products. After the homogenization heat treatment of the aluminum alloy ingot, blister surface bubbles are sometimes formed on the surface. The surface of the aluminum alloy casting appears as scattered protrusions, and the protrusions are cavities. Through magnification, the inner wall of [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4882,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86],"tags":[],"class_list":["post-4881","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Degassing of Aluminum Alloy Casting | Degassing System<\/title>\n<meta name=\"description\" content=\"The degassing of aluminum alloy casting is very important for obtaining high-quality aluminum products. We can choose degassing system.\" \/>\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-of-aluminum-alloy-casting\/\" \/>\n<meta property=\"og:locale\" content=\"id_ID\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Degassing of Aluminum Alloy Casting | Degassing System\" \/>\n<meta property=\"og:description\" content=\"The degassing of aluminum alloy casting is very important for obtaining high-quality aluminum products. 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