Study on the Characteristics of Non-metallic Inclusions in 37Mn5 Steel for Oil Casing Pipe
The characteristics of total oxygen,nitrogen content,micro and large non-metallic inclusions in 37Mn5 steel produced by Tianjin New Tiangang United Special Steel Co.,Ltd.were studied.The results show that the oxygen content after LF refining is reduced by about 31.34％,and the content of non-metallic inclusions is reduced by 18.89％.LF refining has a significant effect on the removal of non-metallic inclusions.There are many non-metallic inclusions containing La and Ce elements in the tundish and slab,indicating that there is a serious slag entrapment phenomenon in the tundish and mold.From the proportion of tracer elements,slag entrapment of mold flux is the main source of large inclusions in slab,followed by tundish covering agent,ladle slag and tundish lining,and the proportion is about 66:44:37:14.Protective casting and preventing secondary oxidation are the main means to control non-metallic inclusions in 37Mn5 steel.
37Mn5 Steelnitrogen and oxygen contentnon-metallic inclusiontracer elements
万方数据
维普
