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 ›› 2015, Vol. 36 ›› Issue (4): 28-30.

• 工艺技术 • 上一篇    下一篇

Nb-Ti微合金化含铬J55石油套管用钢的生产实践

吕国成1,包丽明1,朱金禄2,尚冰2   

  1. 1吉林电子信息职业技术学院冶金学院,吉林132021 ;
    2通化钢铁股份公司技术中心,通化134003
  • 收稿日期:2015-02-15 出版日期:2015-08-01 发布日期:2022-08-25
  • 作者简介:吕国成(1982-),男,硕士(辽宁科技大学),讲师,2006年鞍山科技大学(本科)毕业,冶金传输研究。

Production Practice of Nb-Ti Microalloying and Containing Cr Steel J55 for Oil Casing Tube

Lu Guocheng1, Bao Liming1, Zhu Jinlu2 , Shang Bing2   

  1. 1 Metallurgical Institute, Jilin Technology college of Electric Information Jilin 132021 ;
    2 Technology Center, Tonghua 134003
  • Received:2015-02-15 Published:2015-08-01 Online:2022-08-25

摘要: 8~10 mm J55石油套管用钢板的生产流程为铁水预处理-120 t顶底复吹转炉-LF精炼-87 mm薄板坯连铸-连轧工艺。通过在原有0.015%~0.025%Nb微合金化钢的基础上优化J55石油套管钢的成分(/%:0.16~0.18C,0.5~0.7Mn,≤0.20Si,≤0.025P,≤0.010S,0.03~0.04Cr, 0.01~0.03Ti,0.005~0.010Nb),转炉出钢加200~400 kg铝镁钙预脱氧、精炼过程喂铝线深脱氧,T[O]≤20×10-6时钙处理,板柸加热温度1 100~1 130℃,终轧855~860℃,轧后快速冷却,(610±10)℃卷取等工艺措施,成品钢板屈服强度437~465 MPa,抗拉强度549~575 MPa,伸长率30%~36%,-20℃冲击功60~96 J,180°冷弯合格,各项性能稳定。

关键词: 含铬J55石油套管用钢, 铌钛微合金化, 120tBOF-LF-薄板连铸-连轧, 控轧控冷, 力学性能

Abstract: The production flowsheet of 8〜10 mm plate of steel J55 for oil casing tube is hot metal pretreatment-120 t top and bottom combined blowing converter-LF refining-87 mm thin slab casting-continuous rolling process. With the process measures including based on original 0.015% ~0.025% Nb microalloying steel optimizing the composition of J55 steel for oil casing tube (/%:0.16 ~0.18C, 0.5-0.7Mn, ≤0.20Si, ≤0.025P, ≤ 0.010S, 0.03 ~0.04Cr, 0.01 ~ 0.03Ti, 0.005 ~0.010Nb) pre-oxidizing by adding 200 ~ 400 kg aluminium magnesium calcium alloy at converter tapping, deep de-oxidizing by feeding aluminium wire and calcium treating at T[O]≤20 x 10-6 during refining process, slab heating at 1 100 - 1 130 ℃ , finishing rolling at 855 ~ 860 °C and quick cooling after rolling, and coiling at (610 ± 10) ℃, the properties of finished steel plate are yield strength 437 ~465 MPa, tensile strength 549 〜575 MPa, elongation 30% 〜 36%, impact energy at -20 ℃ 60 ~ 96 J, 180℃ cold-bending test qualified, and each properties of products are steady.