{"id":4775,"date":"2020-12-16T01:26:57","date_gmt":"2020-12-16T01:26:57","guid":{"rendered":"https:\/\/www.aluminiumceramicfiber.com\/?p=4775"},"modified":"2020-12-16T01:29:03","modified_gmt":"2020-12-16T01:29:03","slug":"aluminum-strontium-master-alloy","status":"publish","type":"post","link":"https:\/\/www.aluminiumceramicfiber.com\/id\/aluminum-strontium-master-alloy\/","title":{"rendered":"Paduan Induk Aluminium-Strontium"},"content":{"rendered":"

Paduan aluminium-silikon banyak digunakan dalam produksi produk cor untuk suku cadang pesawat terbang, piston, selongsong katup, serta suku cadang mesin pembakaran dalam lainnya. Untuk mendapatkan produk cor yang sesuai (berkualitas tinggi), perlu dilakukan pemurnian struktural pada proses pengecoran. Paduan tersebut dilelehkan untuk memicu pembentukan kristal silikon yang relatif kecil selama proses pengkristalan. Dibandingkan dengan kasus di mana tidak digunakan bahan penghalus struktur, produk cor yang dihasilkan menunjukkan peningkatan sifat mekanis, seperti keuletan, kekuatan, dan sebagainya. Paduan induk aluminium-strontium cocok digunakan sebagai bahan penghalus struktur selama proses pembekuan paduan aluminium-silikon cair.<\/p>\n

\"Paduan<\/p>\n

Natrium telah digunakan pada paduan aluminium-silikon yang disebutkan di atas, terutama sebagai agen pemurnian struktur untuk paduan aluminium-silikon eutektik atau sub-eutektik, yaitu paduan dengan kandungan silikon hingga sekitar 12% berdasarkan berat. Saat ini, orang-orang menggunakan strontium sebagai pengganti natrium karena strontium memiliki efek penyempurnaan struktur yang lebih baik daripada natrium, lebih ekonomis (dibandingkan dengan natrium, memiliki kehilangan pembakaran yang terbatas), dan kurang berbahaya.<\/p>\n

Dalam proses pemadatan paduan aluminium-silikon hipoeutektik, kristal aluminium primer terbentuk terlebih dahulu hingga tercapai komposisi eutektik, kemudian kristal aluminium dan kristal silikon terbentuk secara bersamaan. Apabila tidak digunakan penghalus struktur, kristal silikon memiliki bentuk seperti jarum dan ukurannya cukup besar. Apabila penghalus struktur digunakan, kristal silikon ini berukuran relatif kecil dan menunjukkan karakteristik berserat, sehingga menghasilkan peningkatan sifat-sifat yang telah disebutkan di atas.<\/p>\n

Saat melarutkan paduan induk aluminium-strontium, partikel-partikel kecil senyawa intermetalik aluminium-strontium (Al\u2084Sr) terlepas, dan senyawa intermetalik aluminium-strontium (Al\u2084Sr) tersebut kemudian larut sehingga membentuk strontium dalam larutan. Selama proses pemadatan, strontium tersebut secara signifikan meningkatkan jumlah kristal silikon, sehingga menghasilkan sejumlah besar kristal kecil alih-alih beberapa kristal besar.<\/p>\n

Paduan strontium<\/a> dapat ditambahkan ke dalam lelehan aluminium-silikon dalam bentuk logam murni atau paduan antara. Karena penambahan logam strontium sangat merepotkan, strontium umumnya ditambahkan dalam bentuk paduan induk.<\/p>","protected":false},"excerpt":{"rendered":"

Aluminum-silicon alloy is widely used in the production of casting products for aircraft parts, pistons and valve sleeves, and other internal combustion engine parts. In order to obtain suitable (high-quality) casting products, it is necessary to add a structural refinery to the casting. The alloy is melted to induce the formation of relatively small silicon […]<\/p>\n","protected":false},"author":1,"featured_media":4776,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[85],"tags":[],"class_list":["post-4775","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seo"],"yoast_head":"\nAluminum Strontium Master Alloy -sales@aluminiumceramicfiber.com<\/title>\n<meta name=\"description\" content=\"Aluminum strontium master alloy is suitable for use as structure refiner during the solidification of molten aluminum-silicon alloys.\" \/>\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\/aluminum-strontium-master-alloy\/\" \/>\n<meta property=\"og:locale\" content=\"id_ID\" \/>\n<meta property=\"og:type\" 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