At present, such materials as aluminum sheets and aluminum coils have a broad consumer market on the market.Its performance is very good and it has a strong corrosion resistance effect. In many industries, aluminum plates are used as a substitute for traditional metal materials, so the price is also going higher.
In recent years, many aluminum sheet manufacturers have emerged. Aluminum sheet manufacturers may encounter defects in the appearance of aluminum sheets when manufacturing aluminum plates. Then, do you know the reasons for the defects in the appearance of aluminum plates? The reasons are as follows:
First, the calender roll type is incorrect. For example, if the calender bearing heats up, the two ends of the roll are swollen, and the center of the plate is thick and the two ends are thin. Creasing; it is easy to produce creasing when the sheet is not fed correctly when calendering; the thickness difference between the two ends of the sheet is easy to produce creasing.
Second, the appearance of bubbles: the surface of the ingot is uneven, there is a dirty east, not cleaned before the furnace is installed; after the erosion, the ingot and the aluminum plate have corrosion residues on the surface; the heating time is too long or the temperature is too high, the ingot Surface oxidation
Third. Ingot cracking: excessive reduction during hot rolling, cracking from the ingot end; ingot heating temperature is too high or too low
Do you know the above three reasons that cause defects on the aluminum sheet surface?
