Fracture analysis of casting connector for power grid equipments

Various failures of casting connector were discussed here. In order to analyze the failure reasons of different samples, a series of tests were carried out, such as macro check, metallographic observation and X-ray penetration method. It turned out that the material defect, casting defect and improper heat process are assigned to be the main reason, respectively. In addition, the corresponding countermeasures were also proposed to improve the quality of power grid equipments. (paper)