Abstract：In order to reveal the causes of unqualified inspection of large round forgings, the forms and composition of various types of defects are discussed, the macroscopic and microscopic characteristics of each type of defects are analyzed,and the causes of the defects and the solutions are proposed. There are three forms of slag inclusion, internal crack and stress that they cause unqualified inspection of large round forging, and the main technological measures to prevent the failure of flaw detection are preventions of secondary oxidation slag,mould fluxes and nozzle blocking to ensure uniform cooling in the cooling process of continuous casting, at the same time reduce the oxygen content in the steel, and avoid the processing method of stress concentration etc.
韩蕾蕾, 邹春锋. 大圆坯环形锻件探伤缺陷类型及机理论述[J]. 连铸, 2022, 41(5): 114-119.
HAN Lei-lei, ZOU Chun-feng. Discussion on defect types and mechanism of ring forgings forged from round billets. CONTINUOUS CASTING, 2022, 41(5): 114-119.
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