{"id":3094,"date":"2018-02-26T03:09:17","date_gmt":"2018-02-26T03:09:17","guid":{"rendered":"http:\/\/www.adtechamm.com\/?p=3094"},"modified":"2018-02-26T03:09:17","modified_gmt":"2018-02-26T03:09:17","slug":"aluminum-flux","status":"publish","type":"post","link":"https:\/\/www.adtechamm.com\/id\/aluminum-flux\/","title":{"rendered":"Flux Aluminium"},"content":{"rendered":"

Flux Aluminium:
\nAgen Pembersih, Agen Penghilang Magnetik, Agen Pemurnian, Agen Pelapis
\nBahan Penghalus Butiran
\nUkuran butir pada paduan aluminium mengacu pada ukuran masing-masing kristal aluminium dalam sebuah benda cor. Ukuran kristal-kristal ini berkaitan langsung dengan jumlah butir atau inti yang terbentuk pada tahap-tahap paling awal proses pemadatan; semakin banyak butirnya, semakin halus ukuran butirnya. Ukuran butir yang kasar meningkatkan kesulitan proses pengisian dan menurunkan kualitas serta sifat mekanis suatu coran. Penghalusan butir membuat butir-butir menjadi lebih kecil dengan meningkatkan jumlah inti kristalisasi pada tahap awal pengkristalan, mirip seperti menaburkan es kering ke awan hujan.
\nKeuntungan dari proses pemurnian biji-bijian antara lain:
\nPenyebaran porositas.
\nPencegahan air mata panas.
\nPeningkatan ketahanan terhadap tekanan melalui pencegahan terbentuknya lubang udara.
\nTitanium, boron, dan zirkonium merupakan bahan penghalus butir yang umum digunakan. Pada paduan hipereutektik, di mana silikon mengendap lebih dulu daripada aluminium, fosfor digunakan untuk menghaluskan butir.<\/p>\n

\"Flux<\/a><\/p>\n

(tersedia dalam varian rendah fluorida, suhu rendah dan tinggi, serta bebas natrium)
\nAluminium bersifat sangat reaktif secara kimia. Lapisan tipis atau kulit aluminium oksida yang kokoh terbentuk dengan cepat pada semua permukaan yang baru terpapar, terutama dalam keadaan cair. Penambahan sisa logam atau ingot ke dalam cairan logam, serta proses pengadukan dan pengocokan, menyebabkan aluminium oksida tersuspensi di dalam cairan logam. Jika oksida-oksida ini terperangkap dalam produk cor, hal tersebut dapat menyebabkan cacat, sehingga harus dihilangkan dari cairan logam. Sebagian besar oksida tersebut berasal dari aluminium, namun unsur-unsur paduan seperti magnesium, besi, tembaga, dan titanium juga dapat membentuk oksida masing-masing.
\nFlux pembersih diperlukan untuk menghilangkan oksida dari logam cair, sedangkan flux pelindung berfungsi sebagai penghalang pada permukaan logam cair untuk mencegah pembentukan oksida. Umumnya, flux yang sama dapat digunakan untuk kedua tujuan tersebut.
\nSenyawa fluorida dalam fluks meningkatkan efektivitasnya dan memungkinkan fluks tersebut digunakan pada suhu yang lebih rendah. Namun, fluorida dapat melepaskan asap berbahaya, sehingga karena alasan lingkungan, beberapa pabrik pengecoran lebih memilih menggunakan fluks dengan kandungan fluorida rendah. Flux bebas natrium digunakan pada paduan hipereutektik (kadar silikon >12%), karena natrium dapat mengganggu proses penghalusan butir fosfor. Flux yang tersedia untuk rentang suhu yang berbeda terutama berbeda dalam titik lelehnya.<\/p>","protected":false},"excerpt":{"rendered":"

Aluminum Flux: Cleaner Agent Demagging Agent Refine Agent Covering agent Grain Refining Fluxes Grain size in aluminum alloys refers to size of individual aluminum crystals in a cast piece. The size of these crystals is directly related to the number of grains or nuclei formed…<\/p>","protected":false},"author":1,"featured_media":3095,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[52],"tags":[761],"yoast_head":"\nAluminum Flux-AdTech Metallurgical Materials Co.,Ltd.<\/title>\n<meta name=\"description\" content=\"Aluminum Flux AdTech Metallurgical Materials Co.,Ltd. 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