Research on non-metallic inclusions of 20G Steel

In the early production of 20G in Steel,crack defects and macro examination unqualified.So the type,resource,amount and distribution of non-inclusions are systemically studied by the actual combination of laboratory and field research methods for the production process of 20G steel,The result shows: Volume ratio of micro-inclusion is 0.149%and 0.184% in normal and casting clab;The content of macro-inclusion in normal and casting clab is 1.81 mg/kg and 3.31 mg/kg.Inclusions are mainly derived from the mold surface with the flux,followed by Tundish complex agent and slag ladle complex.