稀土合金化石油套管钢精炼-连铸-轧制过程夹杂物演变行为

梁雨雨, 倪培远, 刘麒麟, 厉英

Evolution Behavior of Inclusions in Rare Earth Metal Alloying Oil Casing Steel During Refining and Casting and Hot-Rolling Process

LIANG Yuyu, NI Peiyuan, LIU Qilin, LI Ying

图1 未添加稀土和添加稀土的石油套管钢的生产工艺及取样示意图

Fig.1 Schematics of production process and sampling process of oil casing steel (a) RE-free furnace (RE—rare earth, RF2—vacuum degassing (VD) calcium treatment of RE-free steel, RF5—casting billet of RE-free steel, RF6—hot rolled tube blank of RE-free steel) (b) RE furnace (R1—ladle furnace (LF) RE alloying of RE steel, R2—VD calcium treatment of RE steel, R3—VD RE alloying of RE steel, R4—tundish sample of ladle with 80 t of RE steel, R5—casting billet of RE steel, R6—hot rolled tube blank of RE steel)