{"id":4030,"date":"2018-11-29T07:01:10","date_gmt":"2018-11-29T07:01:10","guid":{"rendered":"http:\/\/www.adtechamm.com\/?p=4030"},"modified":"2018-11-29T07:01:10","modified_gmt":"2018-11-29T07:01:10","slug":"temperature-control-during-melting-of-aluminum-alloy","status":"publish","type":"post","link":"https:\/\/www.adtechamm.com\/id\/temperature-control-during-melting-of-aluminum-alloy\/","title":{"rendered":"Pengendalian suhu selama proses peleburan paduan aluminium"},"content":{"rendered":"

Pengendalian suhu selama proses peleburan paduan aluminium<\/strong><\/p>\n

Proses peleburan harus dilakukan pada suhu yang cukup tinggi untuk memastikan bahwa logam dan unsur-unsur paduan benar-benar meleleh dan larut.
\nApabila suhu pemanasan terlalu tinggi, laju peleburan akan meningkat, dan waktu di mana logam serta gas tungku, lapisan dalam tungku, dan sejenisnya saling merusak akan berkurang.
\nPraktik produksi telah menunjukkan bahwa pemanasan cepat untuk mempercepat peleburan bahan baku dan mempersingkat waktu peleburan bermanfaat untuk meningkatkan produktivitas dan kualitas.<\/p>\n

Di sisi lain, suhu yang terlalu tinggi cenderung menyebabkan panas berlebih, dan terutama ketika dipanaskan menggunakan tungku pantulan api, nyala api bersentuhan langsung dengan bahan baku, serta memanaskan logam cair atau setengah cair dengan sangat kuat, sehingga gas dengan mudah meresap ke dalam logam cair tersebut.
\nDi sisi lain, semakin tinggi suhunya, semakin cepat pula interaksi logam dengan gas tungku, lapisan pelindung, dan sebagainya, serta semakin besar pula kehilangan logam dan penurunan kualitas logam cair.
\nPanas berlebih tidak hanya mudah menyerap gas dalam jumlah besar, tetapi juga cenderung membuat struktur butir ingot menjadi kasar setelah proses pemadatan, sehingga meningkatkan risiko retak pada ingot, serta memengaruhi sifat-sifat paduan tersebut.
\nOleh karena itu, selama proses peleburan, suhu peleburan harus dikendalikan untuk mencegah cairan logam menjadi terlalu panas.<\/p>\n

Suhu leleh yang terlalu rendah tidak memiliki arti dalam praktik produksi.
\nOleh karena itu, dalam proses produksi yang sebenarnya, perlu dilakukan upaya untuk mencegah lelehan menjadi terlalu panas, mempercepat proses pelelehan, dan mempersingkat waktu pelelehan.<\/p>\n

\"Pengendalian<\/p>\n

Pengendalian suhu selama proses peleburan paduan aluminium sangatlah penting.<\/strong>
\nSaat ini, sebagian besar pabrik menggunakan metode peleburan cepat bersuhu tinggi setelah proses pengisian cepat, di mana logam dalam keadaan semi-padat dan semi-cair dipaparkan pada gas tungku dan nyala api yang kuat selama waktu singkat, guna mengurangi oksidasi, kehilangan akibat pembakaran, dan peleburan logam. Selanjutnya, ketika lapisan logam cair muncul setelah tungku diratakan, untuk mengurangi panas berlebih lokal pada logam cair, suhu peleburan harus diturunkan secara tepat, dan pengadukan ditingkatkan selama proses peleburan guna memfasilitasi perpindahan panas pada logam cair.
\nSecara khusus, suhu leleh di mana bahan baku benar-benar meleleh perlu dikendalikan.
\nKarena adanya panas laten pada logam atau paduan, suhu akan naik ketika bahan baku telah sepenuhnya meleleh. Pada saat ini, jika suhu leleh diatur terlalu tinggi, logam di seluruh kolam lelehan akan mengalami pemanasan berlebih.
\nDalam praktik produksi, sebagian besar kelebihan panas lelehan yang terjadi disebabkan oleh pengendalian suhu yang kurang baik dalam kasus ini.
\nPemilihan suhu leleh yang sebenarnya secara teoritis seharusnya ditentukan berdasarkan suhu leleh berbagai paduan logam.
\nBerbagai jenis paduan memiliki titik leleh yang berbeda-beda; dengan kata lain, pada paduan dengan komposisi yang berbeda, suhu di mana zat padat mulai meleleh (yang disebut suhu solidus) dan suhu di mana zat padat tersebut sepenuhnya meleleh (yang disebut suhu liquidus) juga berbeda-beda.
\nPada kedua rentang suhu tersebut, logam tersebut berada dalam keadaan setengah cair dan setengah padat.<\/p>\n

Agar pengaturan suhu dapat dilakukan secara akurat selama proses peleburan paduan aluminium<\/a>, suhu leleh harus diukur. Metode paling akurat untuk menentukan suhu leleh masih menggunakan metode termokopel.
\nNamun, para pekerja yang memiliki pengalaman praktis dapat menilai suhu lelehan dengan mengamati berbagai fenomena fisik dan kimia yang terjadi selama proses operasi.
\nMisalnya, warna permukaan bak peleburan, tingkat pembakaran terak, serta kandungan aluminium atau pelunakan alat operasi dalam cairan logam; namun, indikator-indikator ini tidak sepenuhnya dapat diandalkan, karena dipengaruhi oleh cahaya dan cuaca, yang pada gilirannya memengaruhi keakuratannya.<\/p>\n

Kisaran suhu leleh sebagian besar paduan logam cukup luas. Ketika logam berada dalam keadaan setengah padat dan setengah cair\u2014misalnya akibat terpapar dalam waktu lama terhadap gas tungku panas atau nyala api\u2014logam tersebut paling mudah terhirup.
\nOleh karena itu, dalam proses produksi sebenarnya, suhu yang lebih tinggi dari suhu liquidus, yaitu 50 hingga 60 \u00b0C, dipilih sebagai suhu peleburan guna menghindari rentang suhu keadaan setengah cair dengan cepat.<\/p>","protected":false},"excerpt":{"rendered":"

Temperature control during melting of aluminum alloy The smelting process must have a sufficiently high temperature to ensure that the metal and alloying elements are fully melted and dissolved. When the heating temperature is too high, the melting speed is increased, and the time during…<\/p>","protected":false},"author":1,"featured_media":4031,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[52],"tags":[],"yoast_head":"\nTemperature control during melting of aluminum alloy<\/title>\n<meta name=\"description\" content=\"In order to accurately control Temperature control during melting of aluminum alloy, the melt temperature must be measured.\" \/>\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.adtechamm.com\/id\/temperature-control-during-melting-of-aluminum-alloy\/\" \/>\n<meta property=\"og:locale\" content=\"id_ID\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Temperature control during melting of aluminum alloy\" \/>\n<meta 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