{"id":3542,"date":"2020-10-23T09:29:15","date_gmt":"2020-10-23T09:29:15","guid":{"rendered":"https:\/\/www.aluminiumceramicfiber.com\/?p=3542"},"modified":"2020-10-23T09:29:15","modified_gmt":"2020-10-23T09:29:15","slug":"defects-of-metal","status":"publish","type":"post","link":"https:\/\/www.aluminiumceramicfiber.com\/id\/defects-of-metal\/","title":{"rendered":"Cacat pada Logam"},"content":{"rendered":"

Pada permukaan atau bagian dalam lembaran logam yang diproduksi dengan metode cor-gulung, cacat logam atau inklusi logam yang berbeda dari logam dasar baik dalam struktur makro maupun mikro, serta yang terdeteksi dalam pemeriksaan ultrasonik, akan merusak kontinuitas struktur dasar dan merupakan cacat yang tidak dapat diperbaiki. Pada kasus yang parah, lembaran tersebut akan dibuang.<\/p>\n

Cacat pada Logam: Penyebab Utama<\/strong><\/p>\n

Ingot aluminium, paduan induk, dan bahan limbah dalam bahan baku mengandung kotoran seperti minyak dan kelembapan, yang mudah membentuk oksida dan inklusi refraktori; hal tersebut agen pelapis<\/a>, bahan pembentuk terak, bahan pemurnian, dan bahan pemurnian dalam aditif tersebut mudah bereaksi membentuk kalium, natrium, klorin, Al\u2082Ti, TiB\u2082, dll., dicampur dengan rotor grafit, emulsi grafit, dan media pembakaran yang digunakan dalam penyemprotan termal, gas yang telah dimurnikan, serta media pembakaran untuk peleburan dan pemanasan saluran, seperti minyak berat, gas cair, dll., yang mudah membentuk karbon dan nitrida aluminium, klorin, belerang, serta inklusi lainnya.<\/p>\n

Tungku, sistem aliran, dan perkakas tidak bersih; nosel pengecoran dalam kondisi baik; nosel pengecoran terkelupas; dan terak mudah membentuk inklusi seperti kalsium, silika, dan alumina.
\nProses dan pengoperasian yang tidak tepat, seperti terak lelehan yang tidak bersih, pencampuran yang tidak tepat, suhu peleburan yang terlalu tinggi, dan waktu peleburan yang terlalu lama, dan sebagainya, berpotensi menyebabkan terjadinya oksidasi.
\nEfek penghilangan gas dan penyaringan tidak optimal.<\/p>\n

\"Cacat<\/p>\n

Metode Pencegahan Inklusi Logam<\/strong><\/p>\n

Pastikan bahan baku dan bahan pembantu dalam keadaan bersih, serta ingot aluminium, paduan antara, dan bahan limbah yang digunakan bebas dari minyak dan kelembapan; gunakan aditif berkualitas tinggi, emulsi grafit, dan media pembakaran.<\/p>\n

Tungku harus dibersihkan secara teratur untuk memastikan bahwa tungku, sistem aliran, peralatan, dan sebagainya dalam keadaan kering dan bersih.<\/p>\n

Apabila menggunakan penyemprotan termal atau penyemprotan grafit, perbandingan dan jumlah penyemprotan harus disesuaikan untuk memastikan hasil penyemprotan yang merata.<\/p>\n

Memperkuat proses pemurnian dan penghilangan gas serta penyaringan dan pemurnian bahan cair, serta meningkatkan ketepatan penyaringan.<\/p>\n

Persingkat waktu peleburan sebanyak mungkin, turunkan suhu peleburan secara tepat, dan hindari tercampurnya kerak oksida ke dalam cairan logam selama proses produksi.<\/p>\n

Yang rongga nozel<\/a> dan sisa-sisa aluminium pada permukaan rol harus dibersihkan sebelum mencapai pelat vertikal guna meminimalkan pembentukan terak. Jika nosel pengecoran rusak, hentikan proses dan segera ganti nosel tersebut.<\/p>","protected":false},"excerpt":{"rendered":"

On the surface or inside of the cast-rolled sheet, the defects of metal or metal inclusions that are different from the base metal in the macro or microstructure, and in the ultrasonic inspection will destroy the continuity of the base structure and are an irreparable defect. In severe cases, it will be scrapped. Defects of […]<\/p>\n","protected":false},"author":1,"featured_media":3544,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86],"tags":[],"class_list":["post-3542","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nDefects of Metal Main Reason and Prevention Method<\/title>\n<meta name=\"description\" content=\"On the surface or inside of the cast-rolled sheet, the defects of metal that are different from the base metal in the macro.\" \/>\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\/defects-of-metal\/\" \/>\n<meta property=\"og:locale\" content=\"id_ID\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Defects of Metal Main Reason and Prevention 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