Now aluminum coils have become a sought-after material for decoration. Benefiting from the excellent functions of aluminum coils, strong corrosion resistance, and lighter weight, many industries use aluminum coils as a substitute for traditional metal materials. Therefore, many aluminum coil manufacturers have emerged in recent years. Aluminum coil manufacturers may encounter defects on the surface of aluminum coils when making aluminum coils. Then, do you know the reasons for the defects on the surface of aluminum coils?
Incorrect folded (folded) roll shape, for example, the bearing of the calender is heated, which makes both ends of the roll swell, and the center of the extruded sheet is thick and thin at both ends; , and then produce folds; when the sheet is calendered, it is easy to cause folds; the thickness difference between the two ends of the plate is large, which is easy to produce folds, and surface bubbles: the uneven surface of the ingot is dirty, and there is no surface before loading. Wipe clean.
After etching, there are residual traces of etching on the surface of the ingot and the aluminum coil; if the heating time is too long or the temperature is too high, the surface of the ingot is oxidized; the ingot is cracked: the reduction amount is too large during hot rolling, and the end of the ingot is cracked; The ingot heating temperature is too high or too low. Aluminium and aluminium alloy sheet and strip are supplied in coils in hot rolled condition, annealed condition, various grades of soft condition and various heat treatment conditions.
The preparation before hot rolling mainly includes ingot quality inspection, soaking, sawing, milling, aluminum coating and heating, etc. During semi-continuous casting, the cooling rate is very high, the dispersion process in the solid phase is difficult, and the chemical composition inside the ingot is easy to form If there are defects such as segregation, slag inclusion, scarring and cracks on the surface of the ingot, the surface of the ingot should be milled (see the milling surface of the non-ferrous alloy ingot).
Sanmen United Building Materials Co., Ltd. (aluminum coil manufacturer) is a modern enterprise specializing in deep processing of aluminum surfaces. The products cover a variety of surface effects and are favored by the majority of users. The company has now formed a production and sales of color-coated aluminum, mirror aluminum, brushed aluminum, wood-grained aluminum, stone-grained aluminum, embossed aluminum, etc., quality control, product development, and after-sales service. A complete operating system
The company will adhere to continuous innovation, integrity-based, quality first, and won the recognition and trust of customers. The company's products are exported to dozens of countries and regions such as India, Vietnam, Russia, South Korea, the Middle East, and Southeast Asia. We look forward to working with our trading partners. Establish a solid, mutually beneficial and win-win strategic partnership. Contact: 86-576-83381188