Aluminum Die Casting are usually cast with relatively moderate metal melting point, such as aluminum and zinc as raw materials, and various products are cast by aluminum die casting technology. Because of various casting processes and complicated die casting process, aluminum die casting are easy to be damaged.
Generally, aluminum die casting are cast with relatively moderate metal melting point, such as aluminum and zinc as raw materials, and various products are cast by using aluminum die casting technology. Because of various casting processes and complicated die casting process, aluminum die casting are easy to be damaged. Testing strength is to test the integrity of die castings in each process, which has become a major difficulty in the production process. Cracking is a common defect of die casting, because the stress does not reach the corresponding standard in the process of die casting, which will lead to die casting damage.
What factors affect the stress? Actually, it is mainly energy conversion. When producing die castings, mechanical energy, chemical energy and thermal energy are converted into thermal stress of equipment. Therefore, if manufacturers want to keep the working environment of equipment relatively stable, they must adjust the error of energy conversion manually. The damage of die-casting products usually occurs in the processing of the next batch of products. Therefore, the staff should properly adjust the equipment temperature and equipment operating environment in the later processing, so as to ensure the qualified rate of products.
Generally, the surface treatment methods of aluminum die casting include aluminum phosphating, alkaline electrolytic polishing of aluminum, environmental-friendly chemical polishing of aluminum and its alloys, electrochemical surface strengthening of aluminum and its alloys, surface oxidation treatment of aluminum alloys and so on. Through our many studies, it is proved that the leveling effect of DC constant voltage electrolytic polishing can be achieved by pulse electrolytic polishing, but its leveling speed is slow. In addition, special substances added in phosphoric acid-sulfuric acid should be able to inhibit pitting corrosion, slow down overall corrosion, and have leveling and brightening effects. In fact, not all products are suitable for a surface treatment method, which varies from product to product.
