ujung roda<\/a> dan celah nozzle memiliki pengaruh besar terhadap pembentukan garis-garis memanjang. Dalam produksi normal, akibat kesalahan perakitan nozzle atau kualitas nozzle yang buruk, celah antara rol nozzle menjadi terlalu kecil atau tidak merata di beberapa bagian, dan nozzle tergerus setelah terjadi kontak antara rol dan nozzle. Inklusi seperti serbuk dan terak aluminium selama proses pengecoran dan penggulungan akan menumpuk di ujung depan luar nozzle. Saat cairan aluminium mengalir melaluinya, kondisi kristalisasi di sini sangat berbeda dengan kondisi kristalisasi di tempat lain. Perbedaan struktural yang jelas terbentuk pada permukaan gulungan yang digulung akibat kondisi kristalisasi yang berbeda tersebut. Jika perbedaan ini parah, akan timbul cacat sliver; jika ringan, garis-garis memanjang akan muncul. Setelah garis-garis memanjang terbentuk, pola garis tersebut akan tercetak pada posisi yang sama di silinder. Dan secara bertahap membentuk strip aluminium kecil yang tidak rata dan lengket di sepanjang lingkar silinder. Akibat interaksi antara silinder dan gulungan yang dicetak-digulung, garis-garis memanjang ini sulit dihilangkan secara online, terkadang membentang sepanjang seluruh panjang gulungan.<\/p>\nBerdasarkan penyesuaian parameter proses lainnya, celah antara rol nozel diperlebar, dan hasil uji menunjukkan bahwa hampir tidak ada garis-garis pada permukaan billet cor-gulung, garis-garis memanjang terkendali dengan baik, kualitas permukaan blanko telah meningkat secara signifikan, namun celah antara rol nozel terlalu besar. Pada kondisi ini, lapisan oksida di celah antara rol nozel mudah retak dan tergeser ke permukaan pelat, sehingga membentuk cacat lipatan pada lapisan oksida. Dalam kasus yang parah, lapisan oksida pecah dan menyebabkan aluminium kembali ke permukaan. Oleh karena itu, perlu dilakukan dengan hati-hati saat meningkatkan celah antara rol nozel.<\/p>","protected":false},"excerpt":{"rendered":"
Increase the gap on nozzle and rolls, optimize the nozzle flow pattern, help eliminate the longitudinal streak defects, and improve the surface quality of the cast-rolled strip. The surface features of the longitudinal stripes are defects that run through the entire length of the cast-rolled sheet. The longitudinal stripes are bright bands, sometimes deep. The […]<\/p>\n","protected":false},"author":1,"featured_media":3018,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86],"tags":[],"class_list":["post-3006","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\n
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