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 ›› 2009, Vol. 30 ›› Issue (5): 50-52.

• 工艺技术 • 上一篇    下一篇

LF喂Si-Ca线对X70管线钢夹杂物变性的影响

王 敏,包燕平,刘建华,李太全   

  1. 北京科技大学冶金与生态工程学院,北京 100083
  • 收稿日期:2009-04-08 出版日期:2009-10-01 发布日期:2022-11-18
  • 作者简介:王敏(1982-),男,博士研究生,钢的洁净度和夹杂物控制。

Effect of LF Feeding Si-Ca Wire on Modification of Inclusion in Pipeline Steel X70

Wang Min , Bao Yanping , Liu Jianhua , Li Taiquan   

  1. School of Metallurgical and Ecological Engineering,University of Science and Technology,Beijing 100083
  • Received:2009-04-08 Published:2009-10-01 Online:2022-11-18

摘要: 100 t BOF-LF-RH-CC流程冶炼X70管线钢[%:0.04C、1.53Mn、0.106(Nb+V+Ti)],并在LF精炼时采用喂Φ13 mm 60Si-28Ca线处理。经计算和生产试验得出,喂线速度由100 m/min提高至200 m/min时,平均钙收得率由4.05%提高至14.93%,以200 m/min喂入Si-Ca线420~500 m时满足硫化物变性要求,铸坯中69%夹杂为2~10μm球形或类球形夹杂,且处在CaO-Al2O3-MgO系相图低熔点区,变性效果好。

关键词: X70管线钢, LF, 钙处理, 喂线

Abstract: Pipeline steel X70 [%:0.04C,1.53Mn,0.106(Nb+V+Ti)] is melted by 100t BOF-LF-RH-CC flow sheet and feeding Φ13 mm 60Si-28Ca wire treatment is used during LF refining.It is obtained by calculation and commercial production test that with increasing wire feeding speed to 200 m/min from 100 m/min,the average calcium yield increases to 14.93% from 4.05%,and with feeding 420~500 m Si-Ca wire by 200 m/min,the requirement of modification on sulfide is satisfied,69% inclusions in cast billet are 2~10 μm globular and similar to globoid which locate at low-melting-point zone in CaO-Al2O3-MgO phase diagram with nice modifcation effect.

Key words: Pipeline Steel X70, LF, Calcium Treatment, Wire Feeding