Failure Analysis and Countermeasures of Converter Hood

Cracking failure of a converter hood in some steel plant resulted in leakage of cooling water. The failure reasons were analyzed through analyses of macroscopic morphology, chemical composition, microstructure, corrosion products and other aspects using metallographic microscope, scanning electron microscope and other equipment. And corresponding preventive measures were proposed. The results show that heat stress, high temperature oxidation and welding defects were the main reasons for cracking failure of the hood.