Study on Corrosion Cause of the Aluminum Wheel Mold During Low Pressure Die-casting Process
Author of the article:CHEN Zhenming;LIN Jiahua;FU Jiapan;CHEN Qingxun;ZHAO Haidong
Author's Workplace：Foshan Nanhai Superband Mould Co., Ltd., Foshan 528234,China;Nation Engineering Research Center for Metallic Net Shape Forming, South China University of Technology, Guangzhou 510640, China
Key Words：aluminum alloy wheel low pressure die-casting mold soldering corrosion
Abstract：
The corrosion phenomenon in the wheel mold during low pressure die casting process was investigated with optical microscope and scanning electron microscope. The results show that the surface of the mold cavity reacts with the high-temperature aluminum liquid after the falling off of the coating, which results in soldering in the mold surface. Then,the transition layer is formed and it composes of Fe-Al-Si intermetallic compound. Finally, after the cyclic action of the high-temperature aluminum liquid, the transition layer continuously diffuses and falls off from the mold surface, and it eventually causes corrosion of the mold.
