來源：http://www.fuzore.com 發布時間：2020-03-20 14:06:05
The ingot for 5052 aluminum plate roll is melted in the reverberatory furnace and semi continuous casting is carried out. In order to meet the requirements of strict thickness control (5 μ m) in cold rolling, the chemical composition of metal fishing must be controlled within the limits. This is because the change of chemical composition greatly affects the output of the X-ray thickness gauge, that is, the standard value (value) of the metal X-ray absorption calculation is based on the chemical composition of the metal, and the calculated value is fed into the necessary compensation of the cold rolling mill thickness control system.
控制金屬的含氫量，消除熔煉和鑄造過程中的非金屬夾雜物，一直是鑄造工程師關注的主要問題。圖2所示的在線脫氣過濾裝置是由鋁板制造商開發的。將氬氣和氮氣混合后，旋轉金屬中的正常氫氣濃度為0.15-0.20ml / 100g Al。鋁板制造商的實驗室開發了一種奇讀氣體分析儀。它已成功地用于該公司的在線脫氣和過濾系統。氣體分析儀是根據類似于Telegas儀器的熱物理原理設計的，并使用微處理器進行計算。這些分析儀現在已經可以在鋁板制造商之外的地方買到，并且得到了廣泛的應用。
Controlling the hydrogen content of metal and eliminating the non-metallic inclusions in smelting and casting process are always the main concerns of foundry engineers. The on-line degassing filter shown in Figure 2 was developed by an aluminum plate manufacturer. After mixing argon and nitrogen, the normal hydrogen concentration in rotating metal is 0.15-0.20ml/100g al. A strange reading gas analyzer has been developed in the laboratory of aluminum plate manufacturer. It has been successfully used in the company's online degassing and filtration system. The gas analyzer is designed according to the thermophysical principle similar to that of the telegas instrument, and is calculated by microprocessor. These analyzers are now available outside the aluminum plate manufacturers and have been widely used.
In order to eliminate or reduce the non-metallic inclusions in the molten metal, the porous ceramic tube filter as shown in Figure 3 is used in the online degasser and filter system. Four porous ceramic filters of different grades (porosity) can be selected as the filter, as shown in Figure 4, class B (y-e, with relatively thick holes (very thin holes). According to the quality requirements of the plate, choose the grade of ceramic pipe. The medium porosity C-type ceramic tube is usually used, but the porosity of D-type ceramic tube is fine, which is used to eliminate the computer disk blank except for the metal inclusion. Practice shows that even if the molten metal is filtered, the metal will occasionally be polluted by the tiny refractory material falling off the filter structure material. In order to ensure the purity of the metal and avoid contamination by inclusions, the proper refractory lining should be selected for the convection tank.
In order to produce high quality anodized plate, the microstructure and metallographic structure of ingot must be fine and uniform. During casting, the molten metal near the ingot surface should be cooled as deep and uniform as possible. Commonly used hot top casting, ceramic fiberboard is attached to the inside of the ingot, as shown in the figure.
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