ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2011, Vol. 32 ›› Issue (5): 41-42.

• 工艺技术 • 上一篇    下一篇

120 t BOF-LF-Φ200 mm坯连铸工艺试制X52管线钢

陈亮   

  1. 攀钢集团研究院有限公司,成都 611731
  • 收稿日期:2011-04-06 出版日期:2011-10-01 发布日期:2022-11-02
  • 作者简介:陈亮(1983-),男,硕士,工程师,2009年昆明理工大学毕业,二次精炼和质量控制研究。

Pilot Production of Pipe Line Steel X52 by 120 t BOF-LF-Φ 200 mm Round Bloom Concasting Process

Chen Liang   

  1. Pansteel Group Research Institute Co Ltd, Chengdu 611731
  • Received:2011-04-06 Published:2011-10-01 Online:2022-11-02

摘要: 由于方圆连铸机浇铸X52管线钢(%:0.14~0.18C、0.30~0.50Si、1.25~1.40Mn、≤0.025P、≤0.025S、0.03~0.06Nb)易发生水口堵塞和难控制铸坯质量,故采用转炉出钢时根据钢中的碳含量加入200~500kg/炉Fe-Al脱氧剂进行脱氧,在LF用高碱度渣(%:≥70CaO、≤5Al2O3、≤5SiO2、≥5CaF2、≤5MgO、≤0.05N)进行精炼,精炼结束软吹氩≥5 min等技术措施生产X52管线钢。结果表明,LF平均脱硫率37%,钢中S≤0.011%、P≤0.015%,Φ200 mm连铸圆坯表面质量良好,低倍各项评级均小于1.0级。

关键词: X52管线钢, 转炉, LF精炼, Φ200 mm圆坯连铸

Abstract:  In consideration of easier nozzle clogging and difficult control of bloom quality for casting pipe line steel X52 ( % : 0.14~0.18C, 0.30〜0.50Si, 1.25〜1.40Mn, ≤0.025P, ≤0.025S, 0.03~0.06Nb) in casting by square round bloom caster, the pipe line steel X52 is produced with using the technoiogy including according to carbon content in liquid adding 200 ~ 500 kg/heat Fe-Al deoxidizer at tapping of BOF, refining by high basicity slag (% :%:≥70CaO、≤5Al2O3、≤5SiO2、≥5CaF2、≤5MgO、≤0.05N) in LF process, and soft blowing argon for 5 min after refining. Results show that the average desulphurization rate is 37% , in steel the S ≤0.011 % and P ≤0.015% , the surface quality of Φ200 mm round bloom is nice and the rating of each item of macro-etch test is less than rating 1.0

Key words: Pipe Line Steel X52, BOF, LF Refining, Φ200 mm Round Bloom Casting