hot ingot rolling
Đầu tiên, nhôm nóng chảy được đúc thành tấm, và sau khi đồng nhất, cán nóng, cán nguội, ủ trung gian và các quá trình khác, nó tiếp tục được cán nguội thành tấm có độ dày khoảng 0,4 ~ 1,0 mm dưới dạng phôi giấy bạc (đúc → phôi cán nóng → cán nguội → cán lá).
Trong phương pháp cán nóng phôi, the hot rolled billet is first milled to remove defects such as oxide layer and impurities on the surface of the ingot, and then homogenized to make the microstructure of the ingot more uniform, followed by hot rolling, cold rolling and intermediate After multiple processes such as annealing, the internal structure uniformity and grain size of the billet have been significantly improved after multiple recovery and recrystallization. Vì thế, the hot-rolled billet is usually of good quality and suitable for high-quality double zero aluminum foil and deep processing. Sản phẩm lá nhôm. Tuy nhiên, in the deep drawing process of hot-rolled billets, there are problems such as high ear rate, easy cracking, and uneven deformation area, which restricts the improvement of the yield of high-quality aluminum foil.
phương pháp đúc cuộn đôi
Compared with the ingot hot rolling method, the process flow of the aluminum foil blank production by the casting and rolling method is relatively simple; it does not need to go through complicated process steps such as smelting ingot, milling, homogenization and hot rolling, but pours the aluminum melt directly. The two rotating casting rolls (khuôn mẫu) are inserted into the casting and rolling area, and the two processes of solidification and hot rolling are simultaneously completed within 2~3s in the casting and rolling area to obtain a plate with a thickness of 4~7mm. Similar to the hot-rolled aluminum foil billet, the cast-rolled sheet also needs to undergo a series of cold rolling and intermediate annealing processes, and finally rolled into a 0.3~0.7mm thick sheet as an aluminum foil billet.
